:root {
      color-scheme: dark;
      --bg: #090c12;
      --surface: #101620;
      --surface-2: #151d2a;
      --surface-3: #1d2736;
      --line: #273345;
      --line-soft: rgba(255, 255, 255, 0.08);
      --text: #f6f7fb;
      --muted: #9aa8bd;
      --subtle: #65748b;
      --accent: #5f6df2;
      --accent-strong: #7c89ff;
      --success: #34d399;
      --warning: #f5b84b;
      --danger: #fb7185;
      --wood: #9a7048;
      --radius: 8px;
      --shadow: 0 24px 70px rgba(0, 0, 0, 0.38);
      --light-square: #eeeed2;
      --dark-square: #769656;
      --light-coord: #769656;
      --dark-coord: #eeeed2;
    }

    :root[data-appearance="light"] {
      color-scheme: light;
      --bg: #f3f6fb;
      --surface: #ffffff;
      --surface-2: #edf2f8;
      --surface-3: #dfe7f1;
      --line: #d2dbe8;
      --line-soft: rgba(12, 18, 28, 0.10);
      --text: #151d2a;
      --muted: #536176;
      --subtle: #718096;
      --accent: #4057d6;
      --accent-strong: #5f6df2;
      --shadow: 0 20px 54px rgba(21, 29, 42, 0.16);
    }

    * {
      box-sizing: border-box;
    }

    html,
    body {
      width: 100%;
      height: 100%;
      margin: 0;
    }

    body {
      min-height: 100vh;
      overflow: hidden;
      background:
        linear-gradient(135deg, rgba(95, 109, 242, 0.10), transparent 34%),
        linear-gradient(315deg, rgba(52, 211, 153, 0.09), transparent 32%),
        var(--bg);
      color: var(--text);
      font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      letter-spacing: 0;
      user-select: none;
    }

    :root[data-appearance="light"] body {
      background:
        linear-gradient(135deg, rgba(64, 87, 214, 0.12), transparent 35%),
        linear-gradient(315deg, rgba(52, 211, 153, 0.12), transparent 34%),
        var(--bg);
    }

    button,
    input {
      font: inherit;
    }

    button {
      cursor: pointer;
    }

    img {
      display: block;
    }

    .app-header {
      position: sticky;
      top: 0;
      z-index: 40;
      height: 68px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      padding: 0 18px;
      border-bottom: 1px solid var(--line);
      background: rgba(9, 12, 18, 0.88);
      backdrop-filter: blur(16px);
    }

    :root[data-appearance="light"] .app-header {
      background: rgba(255, 255, 255, 0.88);
    }

    .brand-lockup {
      display: inline-flex;
      align-items: center;
      gap: 11px;
      min-width: 218px;
      color: var(--text);
      text-decoration: none;
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      flex: 0 0 auto;
      display: grid;
      place-items: center;
      border-radius: 10px;
      background: linear-gradient(135deg, #f6f7fb 0%, #d8deea 46%, #7c89ff 47%, #5f6df2 100%);
      box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.52), 0 12px 26px rgba(0, 0, 0, 0.28);
    }

    .brand-mark svg {
      width: 28px;
      height: 28px;
      color: #101620;
    }

    .brand-copy {
      display: grid;
      min-width: 0;
      gap: 2px;
    }

    .brand-copy strong {
      color: var(--text);
      font-size: 16px;
      font-weight: 950;
      line-height: 1;
      white-space: nowrap;
    }

    .brand-copy span {
      color: var(--muted);
      font-size: 11px;
      font-weight: 750;
      white-space: nowrap;
    }

    .app-nav {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-width: 0;
    }

    .nav-button {
      min-height: 36px;
      padding: 0 12px;
      border: 1px solid transparent;
      border-radius: var(--radius);
      background: transparent;
      color: var(--muted);
      font-size: 12px;
      font-weight: 900;
      transition: background 140ms ease, color 140ms ease, border-color 140ms ease;
    }

    .nav-button:hover,
    .nav-button:focus-visible {
      background: var(--surface-2);
      border-color: var(--line);
      color: var(--text);
    }

    .trust-pill {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 7px;
      min-height: 34px;
      padding: 0 11px;
      border: 1px solid rgba(52, 211, 153, 0.28);
      border-radius: 999px;
      background: rgba(52, 211, 153, 0.08);
      color: #bbf7d0;
      font-size: 11px;
      font-weight: 900;
      white-space: nowrap;
    }

    .trust-pill i {
      color: var(--success);
    }

    /* ── New header layout ───────────────────────────────────────────── */
    .masthead-row {
      display: flex;
      align-items: center;
      gap: 10px;
      width: 100%;
      min-width: 0;
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 6px;
      margin-left: auto;
      flex-shrink: 0;
    }

    /* More dropdown */
    .nav-more-wrap {
      position: relative;
    }

    .nav-more-btn {
      display: flex;
      align-items: center;
      gap: 5px;
    }

    .nav-more-chevron {
      font-size: 9px;
      transition: transform 0.18s ease;
    }

    .nav-more-wrap.open .nav-more-chevron {
      transform: rotate(180deg);
    }

    .nav-more-menu {
      position: absolute;
      top: calc(100% + 6px);
      left: 50%;
      transform: translateX(-50%);
      z-index: 60;
      min-width: 170px;
      padding: 6px;
      border: 1px solid var(--line);
      border-radius: 12px;
      background: color-mix(in srgb, var(--surface) 96%, transparent);
      backdrop-filter: blur(16px);
      box-shadow: 0 16px 40px rgba(0,0,0,0.32);
      display: flex;
      flex-direction: column;
      gap: 2px;
    }

    .nav-more-menu[hidden] { display: none; }

    .nav-more-item {
      display: flex;
      align-items: center;
      gap: 10px;
      width: 100%;
      padding: 9px 12px;
      border: 0;
      border-radius: 8px;
      background: transparent;
      color: var(--muted);
      font-family: inherit;
      font-size: 13px;
      font-weight: 700;
      text-align: left;
      cursor: pointer;
      transition: background 0.12s, color 0.12s;
    }

    .nav-more-item:hover {
      background: var(--surface-2);
      color: var(--text);
    }

    .nav-more-item i {
      width: 16px;
      text-align: center;
      color: var(--accent);
      font-size: 12px;
      flex-shrink: 0;
    }

    /* ── User pill ───────────────────────────────────────────────────── */
    .user-pill {
      display: flex;
      align-items: center;
      gap: 8px;
      height: 36px;
      padding: 0 10px 0 4px;
      border: 1px solid var(--line);
      border-radius: 999px;
      background: color-mix(in srgb, var(--surface-2) 80%, transparent);
      color: var(--text);
      font-family: inherit;
      cursor: pointer;
      transition: border-color 0.15s, background 0.15s;
      white-space: nowrap;
    }

    .user-pill:hover {
      border-color: var(--accent);
      background: color-mix(in srgb, var(--accent) 10%, var(--surface-2));
    }

    .user-pill-avatar {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      font-size: 12px;
      flex-shrink: 0;
      background: var(--surface-2);
      border: 1px solid var(--line);
    }

    .user-pill-info {
      display: flex;
      flex-direction: column;
      gap: 0px;
      min-width: 0;
    }

    .user-pill-name {
      font-size: 12px;
      font-weight: 800;
      line-height: 1.2;
      color: var(--text);
    }

    .user-pill-rating {
      font-size: 10px;
      font-weight: 700;
      color: var(--accent-strong);
      line-height: 1.2;
    }

    .user-pill-chevron {
      font-size: 9px;
      color: var(--muted);
      flex-shrink: 0;
    }

    /* Logged-in state: accent border */
    .user-pill.is-logged-in {
      border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
    }

    /* ── Account page (full-screen profile workspace) ─────────────────── */
    .account-backdrop {
      z-index: 90;
      padding: 0;
      align-items: stretch;
      background:
        linear-gradient(135deg, color-mix(in srgb, var(--surface) 96%, transparent), color-mix(in srgb, var(--surface-2) 92%, transparent)),
        var(--surface);
    }

    .account-sheet {
      width: 100%;
      max-width: none;
      height: 100dvh;
      border-radius: 0;
      display: flex;
      flex-direction: column;
      margin: 0;
      border: 0;
      background:
        radial-gradient(circle at 20% 0%, color-mix(in srgb, var(--accent) 10%, transparent), transparent 30%),
        var(--surface);
      box-shadow: none;
    }

    .account-page-header {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 18px clamp(18px, 4vw, 48px);
      border-bottom: 1px solid var(--line);
      background: color-mix(in srgb, var(--surface) 96%, transparent);
      backdrop-filter: blur(12px);
      flex-shrink: 0;
      position: sticky;
      top: 0;
      z-index: 2;
    }

    .account-page-title {
      flex: 1;
      margin: 0;
      font-size: clamp(22px, 3vw, 34px);
      font-weight: 900;
      color: var(--text);
      font-family: var(--display-font);
      line-height: 1;
    }

    .account-signout-btn,
    .account-signin-btn {
      min-height: 42px;
      font-size: 13px;
      padding: 0 16px;
      white-space: nowrap;
    }

    .account-page-body {
      flex: 1;
      overflow-y: auto;
      padding: clamp(18px, 4vw, 48px);
      display: grid;
      grid-template-columns: minmax(280px, 0.78fr) minmax(0, 1.22fr);
      align-content: start;
      gap: 20px;
      width: min(1180px, 100%);
      margin: 0 auto;
    }

    /* Identity card */
    .account-identity-card {
      display: flex;
      align-items: flex-start;
      gap: 18px;
      padding: 22px;
      border: 1px solid var(--line);
      border-radius: 16px;
      background:
        linear-gradient(180deg, color-mix(in srgb, var(--surface-2) 92%, transparent), color-mix(in srgb, var(--surface) 84%, transparent));
      box-shadow: 0 18px 45px rgba(35, 28, 20, 0.10);
      position: sticky;
      top: 92px;
    }

    .account-avatar-display {
      width: 112px;
      height: 112px;
      border-radius: 24px;
      display: grid;
      place-items: center;
      font-size: 42px;
      flex-shrink: 0;
      background: var(--surface-2);
      border: 2px solid var(--line);
      box-shadow: inset 0 0 0 1px color-mix(in srgb, #fff 30%, transparent);
    }

    /* An uploaded photo fills its avatar container completely. */
    .has-photo { overflow: hidden; }
    .account-avatar-display.has-photo { padding: 0; }
    .avatar-photo-img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      border-radius: inherit;
      display: block;
    }

    /* Profile photo upload controls */
    .account-photo-row {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .account-photo-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      align-items: center;
    }
    .account-photo-hint {
      margin: 0;
      font-size: 12px;
      color: var(--muted);
      line-height: 1.5;
    }

    .account-identity-info {
      min-width: 0;
      display: flex;
      flex-direction: column;
      gap: 8px;
      padding-top: 4px;
    }
    .account-display-name {
      font-size: clamp(24px, 3vw, 34px);
      font-weight: 900;
      color: var(--text);
      margin: 0;
      line-height: 1;
      font-family: var(--display-font);
      overflow-wrap: anywhere;
    }
    .account-email-line {
      font-size: 13px;
      color: var(--muted);
      margin: 0;
      overflow-wrap: anywhere;
    }

    .account-rating-badge {
      display: inline-flex;
      align-items: baseline;
      gap: 6px;
      width: fit-content;
      padding: 7px 13px;
      border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--line));
      border-radius: 999px;
      background: color-mix(in srgb, var(--accent) 10%, transparent);
    }

    .account-rating-num { font-size: 20px; font-weight: 900; color: var(--accent-strong); }
    .account-rating-label { font-size: 11px; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; }

    /* Section structure */
    .account-section {
      display: flex;
      flex-direction: column;
      gap: 12px;
      padding: 18px;
      border: 1px solid var(--line);
      border-radius: 14px;
      background: color-mix(in srgb, var(--surface-2) 84%, transparent);
      box-shadow: 0 10px 26px rgba(35, 28, 20, 0.06);
    }

    .account-section-title {
      margin: 0;
      font-size: 12px;
      font-weight: 900;
      text-transform: uppercase;
      letter-spacing: 0.1em;
      color: var(--muted);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .account-section-title i { color: var(--accent); }

    /* Avatar grid */
    .account-avatar-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(86px, 1fr));
      gap: 10px;
    }

    .account-avatar-chip {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 6px;
      min-height: 92px;
      padding: 12px 8px;
      border: 1px solid var(--line);
      border-radius: 12px;
      background: var(--surface);
      cursor: pointer;
      transition: border-color 0.14s, background 0.14s, transform 0.14s;
      font-size: 10px;
      font-weight: 700;
      color: var(--muted);
    }

    .account-avatar-chip:hover {
      border-color: var(--accent);
      transform: translateY(-2px);
      color: var(--text);
    }

    .account-avatar-chip.selected {
      border-color: var(--accent);
      background: color-mix(in srgb, var(--accent) 12%, var(--surface-2));
      color: var(--text);
      box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
    }

    .account-avatar-icon {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      font-size: 16px;
    }

    /* Field row */
    .account-field-row {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 10px;
    }

    .account-name-input { font-size: 15px; min-height: 42px; }

    /* Elo card */
    .account-elo-card {
      padding: 0;
      border: 0;
      border-radius: 0;
      background: transparent;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .account-elo-display {
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .account-elo-big {
      font-size: 52px;
      font-weight: 900;
      line-height: 1;
      color: var(--accent-strong);
      font-variant-numeric: tabular-nums;
    }

    .account-elo-meta { display: flex; flex-direction: column; gap: 4px; }
    .account-elo-label { font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
    .account-elo-games { font-size: 12px; color: var(--subtle); }

    .account-elo-note {
      font-size: 12px;
      color: var(--muted);
      line-height: 1.5;
      margin: 0;
      padding-top: 4px;
      border-top: 1px solid var(--line-soft);
    }

    .account-elo-manual summary.account-elo-manual-toggle {
      font-size: 12px;
      font-weight: 700;
      color: var(--accent-strong);
      cursor: pointer;
      list-style: none;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .account-elo-manual summary::-webkit-details-marker { display: none; }
    .account-elo-manual summary::before { content: "\25B6"; font-size: 9px; transition: transform 0.18s; }
    .account-elo-manual[open] summary::before { transform: rotate(90deg); }

    .account-elo-manual-body {
      padding-top: 10px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .account-elo-manual-note {
      font-size: 11px;
      color: var(--muted);
      line-height: 1.45;
      margin: 0;
    }

    .account-reset-btn { align-self: flex-start; font-size: 11px; min-height: 32px; padding: 0 12px; }

    /* Server card */
    .account-server-card {
      padding: 0;
      border: 0;
      border-radius: 0;
      background: transparent;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .account-server-note { font-size: 13px; color: var(--muted); margin: 0; line-height: 1.5; }
    .account-server-note strong { color: var(--text); }

    .account-history-card {
      padding: 0;
      border: 0;
      border-radius: 0;
      background: transparent;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .account-history-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
    }

    .account-history-head p {
      margin: 0;
      font-weight: 900;
      color: var(--text);
    }

    .account-history-list {
      display: flex;
      flex-direction: column;
      gap: 8px;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.45;
    }

    .history-game {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 6px 12px;
      padding: 12px;
      border: 1px solid var(--line-soft);
      border-radius: 10px;
      background: color-mix(in srgb, var(--surface) 88%, transparent);
    }

    .history-game strong {
      color: var(--text);
      font-size: 13px;
    }

    .history-game span {
      color: var(--muted);
      font-size: 11px;
    }

    .history-result {
      font-weight: 900;
      color: var(--accent-strong);
      font-variant-numeric: tabular-nums;
    }

    .history-actions {
      grid-column: 1 / -1;
      display: flex;
      justify-content: flex-end;
      padding-top: 4px;
    }

    .history-view-button {
      min-height: 32px;
      padding: 0 12px;
      color: var(--text);
    }

    @media (min-width: 900px) {
      .account-page-body > .account-section {
        grid-column: 2;
      }

      .account-page-body > .account-identity-card {
        grid-column: 1;
        grid-row: 1 / span 4;
      }
    }

    @media (max-width: 899px) {
      .account-page-body {
        grid-template-columns: 1fr;
      }

      .account-identity-card {
        position: static;
      }
    }

    /* Mobile: account page full-screen */
    @media (max-width: 620px) {
      .account-page-header {
        padding: 12px;
        gap: 8px;
      }
      .account-page-title {
        font-size: 22px;
      }
      .account-signout-btn,
      .account-signin-btn {
        min-height: 38px;
        padding: 0 11px;
        font-size: 12px;
      }
      .account-page-body {
        padding: 14px;
        gap: 14px;
      }
      .account-identity-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
      }
      .account-identity-info {
        align-items: center;
      }
      .account-avatar-display {
        width: 104px;
        height: 104px;
        border-radius: 22px;
      }
      .account-avatar-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
      .account-elo-big { font-size: 42px; }
      .account-history-head { align-items: flex-start; flex-direction: column; }
      .account-field-row { grid-template-columns: 1fr; }
      .user-pill-info { display: none; }
    }

    @media (max-width: 820px) {
      .app-nav { display: none; }
    }

    .app-shell {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 340px;
      height: calc(100vh - 68px);
      min-height: 0;
    }

    .game-area {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 348px;
      gap: 18px;
      min-width: 0;
      min-height: 0;
      padding: 16px;
      overflow: auto;
    }

    .records-rail {
      display: flex;
      flex-direction: column;
      gap: 14px;
      min-width: 0;
      min-height: 0;
      overflow: auto;
    }

    .records-rail .panel {
      margin: 0;
    }

    .board-column {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-width: 0;
      min-height: 660px;
    }

    .player-card,
    .panel,
    .video-card,
    .device-panel,
    .diagnostics {
      border: 1px solid var(--line);
      background: color-mix(in srgb, var(--surface) 92%, transparent);
      box-shadow: 0 14px 34px rgba(0, 0, 0, 0.22);
    }

    .top-bar {
      width: var(--board-width);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      margin-bottom: 10px;
      padding: 10px 12px;
      border-radius: var(--radius);
    }

    .turn-block {
      display: flex;
      align-items: center;
      gap: 10px;
      min-width: 0;
    }

    .turn-dot {
      width: 14px;
      height: 14px;
      flex: 0 0 auto;
      border-radius: 50%;
      background: #fff;
      border: 1px solid rgba(0, 0, 0, 0.45);
      box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.08);
    }

    .turn-dot.black {
      background: #22252d;
      border-color: #515a6a;
      box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.05);
    }

    .eyebrow {
      margin: 0;
      color: var(--subtle);
      font-size: 10px;
      font-weight: 800;
      letter-spacing: 0.12em;
      text-transform: uppercase;
    }

    .headline {
      margin: 2px 0 0;
      color: var(--text);
      font-size: 14px;
      font-weight: 800;
      line-height: 1.15;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .status-text {
      margin: 2px 0 0;
      color: var(--muted);
      font-size: 12px;
      line-height: 1.2;
    }

    .status-text.check {
      color: var(--danger);
      font-weight: 800;
    }

    .status-text.done {
      color: var(--warning);
      font-weight: 800;
    }

    .toolbar {
      display: flex;
      align-items: center;
      gap: 8px;
      flex-wrap: wrap;
      justify-content: flex-end;
    }

    .icon-button,
    .text-button,
    .primary-button,
    .ghost-button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 7px;
      min-height: 36px;
      border-radius: var(--radius);
      border: 1px solid var(--line);
      color: var(--text);
      background: var(--surface-2);
      transition: transform 140ms ease, border-color 140ms ease, background 140ms ease, color 140ms ease;
      touch-action: manipulation;
    }

    .icon-button {
      width: 38px;
      padding: 0;
    }

    .mobile-menu-button {
      display: none;
    }

    .text-button,
    .primary-button,
    .ghost-button {
      padding: 0 12px;
      font-size: 12px;
      font-weight: 800;
    }

    .primary-button {
      background: var(--accent);
      border-color: color-mix(in srgb, var(--accent) 75%, white);
      color: #fff;
    }

    .ghost-button {
      background: transparent;
      color: var(--muted);
    }

    .icon-button:hover,
    .text-button:hover,
    .primary-button:hover,
    .ghost-button:hover {
      transform: translateY(-1px);
      border-color: color-mix(in srgb, var(--accent) 65%, white);
      background: color-mix(in srgb, var(--surface-3) 86%, var(--accent));
      color: #fff;
    }

    .primary-button:hover {
      background: var(--accent-strong);
    }

    .icon-button.off {
      color: var(--subtle);
      background: transparent;
    }

    .icon-button.danger-control {
      color: #efb2ac;
    }

    .icon-button.danger-control:hover {
      border-color: rgba(220, 64, 54, 0.7);
      background: rgba(150, 38, 38, 0.92);
      color: #fff;
    }

    #btn-engine-hints-top[aria-pressed="true"] {
      border-color: color-mix(in srgb, var(--accent) 70%, white);
      background: color-mix(in srgb, var(--accent) 18%, var(--surface-2));
      color: var(--text);
    }

    .icon-button:focus-visible,
    .text-button:focus-visible,
    .primary-button:focus-visible,
    .ghost-button:focus-visible,
    .square:focus-visible,
    .join-input:focus-visible {
      outline: 3px solid rgba(124, 137, 255, 0.36);
      outline-offset: 2px;
    }

    .role-badge {
      display: none;
      align-items: center;
      min-height: 28px;
      padding: 0 9px;
      border-radius: 999px;
      border: 1px solid rgba(124, 137, 255, 0.36);
      background: rgba(95, 109, 242, 0.13);
      color: #b9c0ff;
      font-size: 10px;
      font-weight: 900;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .role-badge.show {
      display: inline-flex;
    }

    .player-card {
      width: var(--board-width);
      display: grid;
      grid-template-columns: 1fr auto;
      align-items: center;
      gap: 8px 12px;
      padding: 10px 12px;
    }

    /* Top card: player-meta | actions+badge | clock — three columns */
    .player-card.top {
      grid-template-columns: 1fr auto auto;
      border-radius: var(--radius) var(--radius) 0 0;
      border-bottom: 0;
      background: color-mix(in srgb, var(--surface) 74%, transparent);
    }

    .player-card.bottom {
      border-radius: 0 0 var(--radius) var(--radius);
      border-top: 0;
      background: color-mix(in srgb, var(--surface) 88%, transparent);
    }

    /* Toolbar icons row inside the top player card */
    .player-card-actions {
      display: flex;
      align-items: center;
      gap: 2px;
      flex-shrink: 0;
    }

    .player-card-actions .icon-button {
      width: 30px;
      height: 30px;
      min-width: 30px;
      padding: 0;
    }

    .player-card-actions .role-badge {
      margin-left: 4px;
    }

    /* Turn elements are kept in DOM for JS but invisible */
    .turn-status-hidden {
      display: none;
    }

    /* Screen-reader-only utility */
    .sr-only {
      position: absolute;
      width: 1px;
      height: 1px;
      padding: 0;
      margin: -1px;
      overflow: hidden;
      clip: rect(0,0,0,0);
      white-space: nowrap;
      border: 0;
    }

    .blog-panel {
      width: var(--board-width);
      margin: 0 0 12px;
      padding: 14px;
    }

    .blog-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      margin-bottom: 12px;
    }

    .blog-kicker {
      color: var(--subtle);
      font-size: 10px;
      font-weight: 900;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      white-space: nowrap;
    }

    .blog-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 10px;
    }

    .blog-card {
      display: grid;
      gap: 7px;
      min-height: 128px;
      padding: 12px;
      border: 1px solid var(--line-soft);
      border-radius: var(--radius);
      background:
        linear-gradient(180deg, color-mix(in srgb, var(--surface-2) 90%, transparent), color-mix(in srgb, var(--surface) 90%, transparent));
    }

    .blog-meta {
      margin: 0;
      color: var(--accent-strong);
      font-size: 10px;
      font-weight: 900;
      letter-spacing: 0.12em;
      text-transform: uppercase;
    }

    .blog-card h3 {
      margin: 0;
      color: var(--text);
      font-family: var(--serif);
      font-size: 15px;
      line-height: 1.1;
    }

    .blog-card p {
      margin: 0;
      color: var(--muted);
      font-size: 12px;
      line-height: 1.5;
    }

    .blog-link {
      align-self: start;
      color: var(--accent-strong);
      font-size: 11px;
      font-weight: 900;
      text-decoration: none;
      text-transform: uppercase;
      letter-spacing: 0.08em;
    }

    .blog-link:hover,
    .blog-link:focus-visible {
      text-decoration: underline;
    }

    .player-meta {
      display: flex;
      align-items: center;
      gap: 10px;
      min-width: 0;
    }

    .avatar {
      width: 36px;
      height: 36px;
      flex: 0 0 auto;
      display: grid;
      place-items: center;
      border-radius: 50%;
      border: 1px solid var(--line);
      background: var(--surface-2);
      color: var(--accent-strong);
    }

    /* On the board, the player photo/avatar is a larger rounded square
       (chess.com-style). The circular look is reserved for the profile page. */
    .player-card .avatar {
      width: 46px;
      height: 46px;
      border-radius: 9px;
    }

    .avatar.white {
      background: linear-gradient(135deg, #f6f7fb, #d8deea);
      color: #232936;
    }

    .avatar.black {
      background: linear-gradient(135deg, #232936, #111722);
      color: #f6f7fb;
    }

    .avatar.profile {
      --avatar-a: #7c89ff;
      --avatar-b: #34d399;
      border-color: rgba(255, 255, 255, 0.36);
      background:
        radial-gradient(circle at 28% 22%, rgba(255, 255, 255, 0.42), transparent 24%),
        linear-gradient(135deg, var(--avatar-a), var(--avatar-b));
      color: #fff;
      box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.25);
    }

    .avatar.profile i {
      filter: drop-shadow(0 2px 3px rgba(0, 0, 0, 0.24));
    }

    .player-name {
      margin: 0;
      font-size: 13px;
      font-weight: 900;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .player-detail {
      margin: 2px 0 0;
      color: var(--muted);
      font-size: 11px;
    }

    .clock {
      min-width: 72px;
      padding: 7px 9px;
      border-radius: var(--radius);
      border: 1px solid var(--line-soft);
      background: rgba(0, 0, 0, 0.22);
      color: #eef2ff;
      font-variant-numeric: tabular-nums;
      font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
      font-size: 15px;
      font-weight: 900;
      text-align: right;
    }

    .clock.active {
      border-color: rgba(52, 211, 153, 0.55);
      box-shadow: inset 0 0 0 1px rgba(52, 211, 153, 0.15);
    }

    .board-frame {
      position: relative;
      width: min(100%, 560px);
      aspect-ratio: 1 / 1;
      overflow: hidden;
      border: 6px solid #171f2d;
      background: #171f2d;
      box-shadow: var(--shadow);
    }

    .chessboard {
      display: grid;
      grid-template-columns: repeat(8, 1fr);
      grid-template-rows: repeat(8, 1fr);
      width: 100%;
      height: 100%;
      touch-action: none;
    }

    .square {
      position: relative;
      display: grid;
      place-items: center;
      width: 100%;
      height: 100%;
      border: 0;
      padding: 0;
      color: inherit;
      cursor: pointer;
      overflow: hidden;
      touch-action: none;
    }

    .chessboard.dragging,
    .chessboard.dragging .square {
      cursor: grabbing;
    }

    .square.light {
      background: var(--light-square);
    }

    .square.dark {
      background: var(--dark-square);
    }

    .square.last-move::before {
      content: "";
      position: absolute;
      inset: 0;
      background: rgba(247, 247, 105, 0.42);
      z-index: 1;
    }

    .square.selected::after {
      content: "";
      position: absolute;
      inset: 0;
      border: 4px solid rgba(245, 184, 75, 0.96);
      background: rgba(245, 184, 75, 0.20);
      z-index: 4;
      pointer-events: none;
    }

    .square.drag-source .piece-shell {
      opacity: 0.18;
      transform: scale(0.9);
    }

    .square.drag-over::after {
      content: "";
      position: absolute;
      inset: 5px;
      z-index: 5;
      border: 3px solid rgba(52, 211, 153, 0.90);
      border-radius: 10px;
      pointer-events: none;
    }

    .square.drag-over.illegal::after {
      border-color: rgba(251, 113, 133, 0.90);
    }

    .square.king-check {
      box-shadow: inset 0 0 0 999px rgba(251, 113, 133, 0.30);
    }

    .square.premove::before {
      content: "";
      position: absolute;
      inset: 0;
      background: rgba(255, 84, 62, 0.50);
      z-index: 2;
    }

    .square.premove-select::after {
      content: "";
      position: absolute;
      inset: 0;
      border: 4px solid rgba(255, 84, 62, 0.95);
      background: rgba(255, 84, 62, 0.22);
      z-index: 4;
      pointer-events: none;
    }

    :root[data-appearance="light"] .square.premove::before {
      background: rgba(214, 64, 44, 0.46);
      box-shadow: inset 0 0 0 2px rgba(214, 64, 44, 0.58);
    }

    :root[data-appearance="light"] .square.premove-select::after {
      border-color: rgba(196, 52, 34, 0.95);
      background: rgba(214, 64, 44, 0.20);
    }

    .coord {
      position: absolute;
      z-index: 5;
      font-size: 10px;
      font-weight: 900;
      line-height: 1;
      pointer-events: none;
    }

    .coord.file {
      right: 5px;
      bottom: 4px;
    }

    .coord.rank {
      top: 5px;
      left: 5px;
    }

    .square.light .coord {
      color: var(--light-coord);
    }

    .square.dark .coord {
      color: var(--dark-coord);
    }

    .piece-shell {
      position: relative;
      z-index: 3;
      display: grid;
      place-items: center;
      width: 100%;
      height: 100%;
      transition: transform 120ms ease;
      will-change: transform;
      pointer-events: none;
    }

    .square:hover .piece-shell {
      transform: translateY(-2px) scale(1.025);
    }

    .piece-img {
      width: 86%;
      height: 86%;
      object-fit: contain;
      filter: drop-shadow(0 5px 6px rgba(0, 0, 0, 0.24));
      pointer-events: none;
    }

    .drag-ghost {
      position: fixed;
      left: 0;
      top: 0;
      z-index: 1000;
      width: var(--drag-size, 70px);
      height: var(--drag-size, 70px);
      display: grid;
      place-items: center;
      pointer-events: none;
      transform: translate(-50%, -50%);
      filter: drop-shadow(0 18px 22px rgba(0, 0, 0, 0.34));
    }

    .drag-ghost .piece-img {
      width: 92%;
      height: 92%;
    }

    .piece-fallback {
      display: grid;
      place-items: center;
      width: 72%;
      height: 72%;
      border-radius: 50%;
      color: #0d1118;
      background: rgba(255, 255, 255, 0.78);
      border: 2px solid rgba(0, 0, 0, 0.5);
      font-size: clamp(18px, 5vw, 38px);
      font-weight: 900;
      line-height: 1;
    }

    .piece-fallback.black {
      color: #f6f7fb;
      background: rgba(17, 22, 32, 0.90);
      border-color: rgba(255, 255, 255, 0.34);
    }

    .hint {
      position: absolute;
      z-index: 2;
      pointer-events: none;
    }

    .hint.move {
      width: 18%;
      height: 18%;
      border-radius: 50%;
      background: rgba(0, 0, 0, 0.20);
    }

    .hint.capture {
      width: 82%;
      height: 82%;
      border-radius: 50%;
      border: 5px solid rgba(0, 0, 0, 0.18);
    }

    .overlay {
      position: absolute;
      inset: 0;
      z-index: 20;
      display: none;
      align-items: center;
      justify-content: center;
      padding: 24px;
      background: rgba(9, 12, 18, 0.86);
      backdrop-filter: blur(12px);
    }

    .overlay.show {
      display: flex;
    }

    .overlay-box {
      width: min(100%, 360px);
      padding: 22px;
      border-radius: var(--radius);
      border: 1px solid var(--line);
      background: var(--surface);
      text-align: center;
      box-shadow: var(--shadow);
    }

    .overlay-icon {
      display: grid;
      place-items: center;
      width: 58px;
      height: 58px;
      margin: 0 auto 12px;
      border-radius: 50%;
      background: rgba(95, 109, 242, 0.16);
      color: var(--accent-strong);
      border: 1px solid rgba(124, 137, 255, 0.35);
      font-size: 24px;
    }

    .overlay-title {
      margin: 0;
      font-size: 22px;
      font-weight: 950;
      letter-spacing: 0;
    }

    .overlay-desc {
      margin: 8px 0 18px;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.45;
    }

    .promotion-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 10px;
    }

    .promotion-button {
      display: grid;
      place-items: center;
      aspect-ratio: 1 / 1;
      border-radius: var(--radius);
      border: 1px solid var(--line);
      background: var(--surface-2);
      transition: transform 140ms ease, background 140ms ease, border-color 140ms ease;
    }

    .promotion-button:hover {
      transform: translateY(-2px);
      background: var(--surface-3);
      border-color: var(--accent-strong);
    }

    .promotion-button img {
      width: 82%;
      height: 82%;
      object-fit: contain;
    }

    .side-panel {
      display: flex;
      flex-direction: column;
      gap: 14px;
      min-width: 0;
      min-height: 0;
    }

    .panel {
      border-radius: var(--radius);
      padding: 14px;
      /* Isolate each panel's layout/paint so changes in one don't recalc others. */
      contain: layout style;
    }

    .panel-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
      margin-bottom: 10px;
    }

    .panel-title {
      display: flex;
      align-items: center;
      gap: 8px;
      margin: 0;
      color: var(--text);
      font-size: 13px;
      font-weight: 900;
    }

    .panel-title i {
      color: var(--accent-strong);
    }

    .panel-copy {
      margin: 0 0 12px;
      color: var(--muted);
      font-size: 12px;
      line-height: 1.48;
    }

    .button-stack {
      display: grid;
      gap: 9px;
    }

    .join-row {
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 8px;
    }

    .join-input {
      min-width: 0;
      min-height: 36px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: 0 10px;
      color: var(--text);
      background: rgba(0, 0, 0, 0.18);
      outline: 0;
      user-select: text;
      transition: border-color 0.15s ease, box-shadow 0.15s ease;
    }

    .join-input:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent);
    }

    /* In the welcome/auth forms, use larger touch targets and 16px font
       (16px prevents iOS Safari from zooming in when you tap a field). */
    .auth-field .join-input {
      min-height: 46px;
      padding: 0 14px;
      font-size: 16px;
      border-radius: 10px;
    }

    .join-input::placeholder {
      color: var(--subtle);
    }

    .room-box {
      display: none;
      margin-top: 12px;
      padding-top: 12px;
      border-top: 1px solid var(--line-soft);
    }

    .privacy-relay-row {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-top: 10px;
      padding: 8px 10px;
      border: 1px solid var(--line-soft);
      border-radius: var(--radius);
      cursor: pointer;
      user-select: none;
      transition: background 0.15s ease;
    }

    .privacy-relay-row:hover {
      background: rgba(0,0,0,0.12);
    }

    .privacy-relay-checkbox {
      width: 15px;
      height: 15px;
      flex-shrink: 0;
      accent-color: var(--accent);
      cursor: pointer;
    }

    .privacy-relay-text {
      font-size: 12px;
      font-weight: 600;
      color: var(--muted);
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 6px;
      line-height: 1.3;
    }

    .privacy-relay-hint {
      flex-basis: 100%;
      font-size: 10.5px;
      font-weight: 500;
      color: var(--subtle);
      line-height: 1.4;
      margin-top: 2px;
    }

    .privacy-relay-text i {
      color: var(--accent);
      font-size: 11px;
    }

    .privacy-relay-row:has(.privacy-relay-checkbox:checked) .privacy-relay-text {
      color: var(--text);
    }

    .room-box.show {
      display: block;
    }

    .copy-row {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 38px;
      gap: 8px;
      align-items: center;
    }

    .room-id {
      min-width: 0;
      min-height: 36px;
      display: flex;
      align-items: center;
      padding: 0 10px;
      border-radius: var(--radius);
      border: 1px solid var(--line-soft);
      background: rgba(0, 0, 0, 0.24);
      color: #cbd5e1;
      font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
      font-size: 11px;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
      user-select: all;
    }

    .mini-status {
      min-height: 16px;
      margin-top: 7px;
      color: var(--success);
      font-size: 11px;
      font-weight: 800;
      text-align: center;
    }

    .mode-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 8px;
    }

    /* ---- Difficulty selector + Practice Rating ---- */
    .difficulty-box {
      margin-top: 12px;
      padding: 12px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: color-mix(in srgb, var(--surface) 60%, transparent);
    }

    .difficulty-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 8px;
      margin-bottom: 10px;
      flex-wrap: wrap;
    }

    .difficulty-label {
      font-size: 12px;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 0.04em;
      color: var(--text);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .difficulty-label i { color: var(--accent); }

    .difficulty-auto {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 11px;
      font-weight: 600;
      color: var(--muted);
      cursor: pointer;
      user-select: none;
    }

    .difficulty-auto input { accent-color: var(--accent); cursor: pointer; }

    .difficulty-levels {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 4px;
    }

    .difficulty-chip {
      padding: 7px 2px;
      border: 1px solid var(--line);
      border-radius: 6px;
      background: transparent;
      color: var(--muted);
      font-size: 10px;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 0.02em;
      cursor: pointer;
      transition: all 0.14s ease;
      text-align: center;
    }

    .difficulty-chip:hover { border-color: var(--accent); color: var(--text); }

    .difficulty-chip.active {
      background: var(--accent);
      border-color: var(--accent);
      color: #f8ead0;
    }

    .difficulty-levels.is-auto .difficulty-chip {
      opacity: 0.55;
      cursor: default;
    }

    .difficulty-levels.is-auto .difficulty-chip.active {
      opacity: 1;
    }

    .difficulty-blurb {
      margin: 8px 0 0;
      font-size: 11px;
      color: var(--muted);
      line-height: 1.4;
    }

    .rating-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
      margin-top: 12px;
      padding-top: 12px;
      border-top: 1px solid var(--line-soft);
    }

    .rating-value { display: flex; flex-direction: column; line-height: 1; }

    .rating-number {
      font-family: var(--serif, inherit);
      font-size: 30px;
      font-weight: 700;
      color: var(--accent);
    }

    .rating-caption {
      margin-top: 3px;
      font-size: 10px;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      color: var(--subtle);
    }

    .rating-reset { min-height: 32px; padding: 0 12px; font-size: 11px; }

    .rating-note {
      margin: 10px 0 0;
      font-size: 10px;
      line-height: 1.45;
      color: var(--subtle);
    }

    @media (max-width: 620px) {
      .difficulty-levels { grid-template-columns: repeat(3, 1fr); }
    }

    .log-panel {
      flex: 1 1 auto;
      min-height: 280px;
      display: flex;
      flex-direction: column;
    }

    .match-log {
      flex: 1 1 auto;
      min-height: 180px;
      max-height: 280px;
      overflow: auto;
      padding: 10px;
      border-radius: var(--radius);
      border: 1px solid var(--line-soft);
      background: rgba(0, 0, 0, 0.24);
      color: #cbd5e1;
      font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
      font-size: 11px;
      line-height: 1.45;
    }

    .log-entry {
      margin-bottom: 5px;
      white-space: normal;
      overflow-wrap: anywhere;
    }

    .log-entry.success {
      color: var(--success);
      font-weight: 800;
    }

    .log-entry.error {
      color: var(--danger);
      font-weight: 800;
    }

    .log-entry.move {
      color: #f3f4f6;
      font-weight: 800;
    }

    .log-entry.media,
    .log-entry.net {
      color: #aab4ff;
    }

    .attribution {
      margin-top: 12px;
      color: var(--subtle);
      font-size: 10px;
      line-height: 1.45;
    }

    .attribution a {
      color: #b9c0ff;
      text-decoration: none;
    }

    .attribution a:hover {
      text-decoration: underline;
    }

    .app-footer {
      grid-column: 1 / -1;
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      align-items: center;
      gap: 14px;
      min-width: 0;
      padding: 14px 16px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: color-mix(in srgb, var(--surface) 90%, transparent);
      box-shadow: 0 12px 28px rgba(0, 0, 0, 0.18);
    }

    .footer-brand {
      display: grid;
      gap: 3px;
      min-width: 0;
    }

    .footer-brand strong {
      color: var(--text);
      font-size: 12px;
      font-weight: 950;
      letter-spacing: 0.06em;
      text-transform: uppercase;
    }

    .footer-brand span {
      color: var(--muted);
      font-size: 12px;
      line-height: 1.45;
    }

    .footer-links {
      display: flex;
      flex-wrap: wrap;
      justify-content: flex-end;
      gap: 8px;
    }

    .footer-link {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      min-height: 32px;
      padding: 0 10px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--surface-2);
      color: var(--text);
      font-size: 11px;
      font-weight: 900;
      text-decoration: none;
      transition: transform 140ms ease, border-color 140ms ease, background 140ms ease, color 140ms ease;
    }

    .footer-link:hover,
    .footer-link:focus-visible {
      transform: translateY(-1px);
      border-color: color-mix(in srgb, var(--accent) 65%, white);
      background: color-mix(in srgb, var(--surface-3) 86%, var(--accent));
      color: #fff;
      outline: 0;
    }

    .video-pane {
      display: flex;
      flex-direction: column;
      min-width: 0;
      min-height: 0;
      border-left: 1px solid var(--line);
      background: color-mix(in srgb, var(--surface) 92%, transparent);
    }

    .video-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      min-height: 64px;
      padding: 14px;
      border-bottom: 1px solid var(--line);
    }

    .live-dot {
      width: 9px;
      height: 9px;
      border-radius: 50%;
      background: var(--success);
      box-shadow: 0 0 0 5px rgba(52, 211, 153, 0.10);
    }

    .video-scroll {
      flex: 1 1 auto;
      min-height: 0;
      overflow: auto;
      padding: 14px;
    }

    .video-card {
      position: relative;
      overflow: hidden;
      aspect-ratio: 16 / 9;
      margin-bottom: 14px;
      border-radius: var(--radius);
      background: #070a0f;
    }

    .video-card video,
    .video-card canvas {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .hidden {
      display: none !important;
    }

    .video-caption {
      position: absolute;
      inset: auto 0 0;
      z-index: 3;
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 10px;
      padding: 34px 12px 12px;
      background: linear-gradient(to top, rgba(0, 0, 0, 0.76), transparent);
    }

    .video-name {
      margin: 0;
      font-size: 12px;
      font-weight: 900;
    }

    .video-detail {
      margin: 2px 0 0;
      color: rgba(255, 255, 255, 0.62);
      font-size: 10px;
    }

    .media-state-card {
      position: absolute;
      top: 8px;
      left: 8px;
      z-index: 6;
      width: min(250px, calc(100% - 72px));
      display: grid;
      grid-template-columns: 30px minmax(0, 1fr);
      gap: 8px;
      align-items: center;
      padding: 8px;
      border: 1px solid rgba(255, 255, 255, 0.16);
      border-radius: var(--radius);
      background: rgba(8, 12, 20, 0.76);
      color: #fff;
      box-shadow: 0 12px 28px rgba(0, 0, 0, 0.28);
      backdrop-filter: blur(12px);
    }

    .media-state-card.safe {
      border-color: rgba(52, 211, 153, 0.34);
      background: rgba(8, 28, 24, 0.76);
    }

    .media-state-card.ready {
      border-color: rgba(245, 184, 75, 0.38);
      background: rgba(34, 27, 12, 0.78);
    }

    .media-state-card.live {
      border-color: rgba(52, 211, 153, 0.48);
      background: rgba(8, 31, 24, 0.84);
    }

    .media-state-card.off {
      border-color: rgba(251, 113, 133, 0.40);
      background: rgba(36, 12, 18, 0.80);
    }

    .media-state-icon {
      display: grid;
      place-items: center;
      width: 30px;
      height: 30px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.12);
      color: var(--success);
      font-size: 12px;
    }

    .media-state-card.ready .media-state-icon {
      color: var(--warning);
    }

    .media-state-card.off .media-state-icon {
      color: var(--danger);
    }

    .media-state-title {
      display: block;
      color: #fff;
      font-size: 11px;
      font-weight: 950;
      line-height: 1.15;
    }

    .media-state-copy {
      display: block;
      margin-top: 2px;
      color: rgba(255, 255, 255, 0.72);
      font-size: 9px;
      font-weight: 750;
      line-height: 1.25;
    }

    .status-icons {
      display: flex;
      gap: 6px;
    }

    .status-pill {
      width: 25px;
      height: 25px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      background: rgba(12, 18, 28, 0.82);
      color: var(--success);
      font-size: 11px;
    }

    .status-pill.off {
      color: var(--danger);
    }

    .preview-controls {
      position: absolute;
      top: 8px;
      right: 8px;
      z-index: 6;
      display: flex;
      gap: 6px;
    }

    .preview-control {
      width: 30px;
      height: 30px;
      display: grid;
      place-items: center;
      border: 1px solid rgba(255, 255, 255, 0.18);
      border-radius: 999px;
      background: rgba(8, 12, 20, 0.70);
      color: #fff;
      font-size: 11px;
      box-shadow: 0 8px 18px rgba(0, 0, 0, 0.22);
      backdrop-filter: blur(10px);
      transition: transform 140ms ease, background 140ms ease, color 140ms ease;
    }

    .preview-control:hover {
      transform: translateY(-1px);
      background: rgba(20, 27, 40, 0.90);
    }

    .preview-control.off {
      color: var(--danger);
    }

    .remote-mask {
      position: absolute;
      inset: 0;
      z-index: 4;
      display: grid;
      place-items: center;
      padding: 18px;
      background: rgba(7, 10, 15, 0.86);
      text-align: center;
    }

    .local-video-mask {
      position: absolute;
      inset: 0;
      z-index: 5;
      display: grid;
      place-items: center;
      padding: 16px;
      background: rgba(7, 10, 15, 0.86);
      color: var(--muted);
      text-align: center;
      font-size: 12px;
      font-weight: 900;
    }

    .local-video-mask i {
      display: grid;
      place-items: center;
      width: 38px;
      height: 38px;
      margin: 0 auto 8px;
      border-radius: 50%;
      border: 1px solid var(--line);
      color: var(--danger);
      background: var(--surface);
      font-size: 15px;
    }

    .remote-mask i {
      display: grid;
      place-items: center;
      width: 46px;
      height: 46px;
      margin: 0 auto 10px;
      border-radius: 50%;
      border: 1px solid var(--line);
      color: var(--subtle);
      background: var(--surface);
      font-size: 18px;
    }

    .remote-mask p {
      margin: 0;
      color: #d7deea;
      font-size: 12px;
      font-weight: 850;
    }

    .remote-mask span {
      display: block;
      margin-top: 4px;
      color: var(--subtle);
      font-size: 10px;
    }

    .device-panel {
      display: grid;
      gap: 13px;
      margin-top: 2px;
      padding: 14px;
      border-radius: var(--radius);
    }

    .media-safety-note {
      display: grid;
      grid-template-columns: 32px minmax(0, 1fr);
      gap: 10px;
      align-items: center;
      padding: 11px;
      border: 1px solid rgba(52, 211, 153, 0.22);
      border-radius: var(--radius);
      background: rgba(52, 211, 153, 0.07);
      color: var(--text);
    }

    .media-safety-note.ready {
      border-color: rgba(245, 184, 75, 0.26);
      background: rgba(245, 184, 75, 0.08);
    }

    .media-safety-note.live {
      border-color: rgba(52, 211, 153, 0.34);
      background: rgba(52, 211, 153, 0.10);
    }

    .media-safety-note.off {
      border-color: rgba(251, 113, 133, 0.30);
      background: rgba(251, 113, 133, 0.08);
    }

    .media-safety-note i {
      display: grid;
      place-items: center;
      width: 32px;
      height: 32px;
      border-radius: 50%;
      color: var(--success);
      background: rgba(255, 255, 255, 0.08);
    }

    .media-safety-note.ready i {
      color: var(--warning);
    }

    .media-safety-note.off i {
      color: var(--danger);
    }

    .media-safety-note strong,
    .media-safety-note span {
      display: block;
    }

    .media-safety-note strong {
      font-size: 12px;
      font-weight: 950;
      line-height: 1.2;
    }

    .media-safety-note span {
      margin-top: 3px;
      color: var(--muted);
      font-size: 11px;
      font-weight: 750;
      line-height: 1.35;
    }

    .device-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      color: var(--muted);
      font-size: 12px;
      font-weight: 800;
    }

    .switch {
      position: relative;
      width: 44px;
      height: 26px;
      flex: 0 0 auto;
      border: 1px solid rgba(124, 137, 255, 0.36);
      border-radius: 999px;
      background: var(--accent);
      padding: 0;
    }

    .switch::after {
      content: "";
      position: absolute;
      top: 3px;
      left: 21px;
      width: 18px;
      height: 18px;
      border-radius: 50%;
      background: #fff;
      transition: left 160ms ease;
    }

    .switch.off {
      border-color: var(--line);
      background: var(--surface-3);
    }

    .switch.off::after {
      left: 4px;
    }

    .diagnostics {
      padding: 12px 14px;
      border-width: 1px 0 0;
      background: rgba(0, 0, 0, 0.24);
      color: var(--subtle);
      font-size: 10px;
    }

    .diag-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      margin: 3px 0;
    }

    .diag-value {
      color: #b9c0ff;
      font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    }

    .support-actions {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 8px;
    }

    .support-list {
      display: grid;
      gap: 7px;
      margin: 12px 0 0;
      padding: 0;
      list-style: none;
      color: var(--muted);
      font-size: 12px;
      line-height: 1.4;
    }

    .support-list li {
      display: flex;
      align-items: flex-start;
      gap: 8px;
    }

    .support-list i {
      width: 14px;
      margin-top: 2px;
      color: var(--success);
      font-size: 11px;
    }

    .sheet-backdrop {
      position: fixed;
      inset: 0;
      z-index: 80;
      display: none;
      place-items: center;
      padding: 18px;
      background: rgba(4, 7, 12, 0.72);
      backdrop-filter: blur(12px);
    }

    .sheet-backdrop.show {
      display: grid;
    }

    .sheet-backdrop.over-beta {
      z-index: 130;
    }

    .beta-backdrop {
      z-index: 120;
      padding: 0;
      place-items: start center;
      overflow-y: auto;
      background: rgba(5, 7, 11, 0.92);
    }

    .beta-backdrop.show {
      display: grid;
    }

    .beta-sheet {
      width: min(100%, 440px);
      margin: auto;
      align-self: start;
      height: max-content;
      overflow: hidden;
      border-radius: 18px;
      display: flex;
      flex-direction: column;
    }

    .beta-hero > * { flex-shrink: 0; }

    /* Hero: a chessboard motif — the signature element */
    .beta-hero {
      position: relative;
      flex-shrink: 0;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      gap: 14px;
      padding: 34px 24px 26px;
      border-bottom: 1px solid var(--line);
      overflow: hidden;
      background:
        linear-gradient(180deg, color-mix(in srgb, var(--accent) 22%, var(--surface)) 0%, var(--surface) 100%);
    }

    /* Faint 8x8 board grid drawn behind the hero content */
    .beta-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(45deg, rgba(255,255,255,0.04) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.04) 75%),
        linear-gradient(45deg, rgba(255,255,255,0.04) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.04) 75%);
      background-size: 44px 44px;
      background-position: 0 0, 22px 22px;
      opacity: 0.5;
      pointer-events: none;
      mask-image: linear-gradient(180deg, rgba(0,0,0,0.9), transparent 90%);
      -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,0.9), transparent 90%);
    }

    .beta-icon {
      position: relative;
      display: grid;
      place-items: center;
      width: 66px;
      height: 66px;
      border-radius: 18px;
      border: 1px solid color-mix(in srgb, var(--accent-strong) 40%, transparent);
      background: linear-gradient(145deg, var(--accent), var(--accent-strong));
      color: #fff;
      font-size: 30px;
      box-shadow: 0 12px 30px color-mix(in srgb, var(--accent) 40%, transparent);
    }

    .beta-kicker {
      position: relative;
      margin: 0;
      color: var(--accent-strong);
      font-size: 11px;
      font-weight: 800;
      letter-spacing: 0.16em;
      text-transform: uppercase;
    }

    .beta-title {
      position: relative;
      margin: 2px 0 0;
      color: var(--text);
      font-size: 30px;
      font-weight: 950;
      line-height: 1.05;
      letter-spacing: -0.01em;
    }

    .beta-copy {
      position: relative;
      margin: 4px 0 0;
      max-width: 320px;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.55;
    }

    .beta-body {
      padding: 20px;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .onboard-trust-row {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 8px;
    }

    .onboard-trust-item {
      min-height: 42px;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      padding: 9px 8px;
      border: 1px solid var(--line-soft);
      border-radius: 8px;
      background: color-mix(in srgb, var(--surface-2) 74%, transparent);
      color: var(--muted);
      font-size: 11px;
      font-weight: 800;
      text-align: center;
    }

    .onboard-trust-item i {
      color: var(--accent);
      font-size: 12px;
    }

    .beta-points {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 10px;
      margin-bottom: 12px;
    }

    .beta-point {
      display: grid;
      grid-template-columns: 32px minmax(0, 1fr);
      gap: 10px;
      padding: 12px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--surface-2);
    }

    .beta-point i {
      display: grid;
      place-items: center;
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.07);
      color: var(--success);
    }

    .beta-point strong,
    .beta-point span {
      display: block;
    }

    .beta-point strong {
      color: var(--text);
      font-size: 12px;
      font-weight: 950;
    }

    .beta-point span {
      margin-top: 3px;
      color: var(--muted);
      font-size: 11px;
      line-height: 1.4;
    }

    .storage-note {
      display: grid;
      grid-template-columns: 22px minmax(0, 1fr);
      gap: 10px;
      align-items: start;
      padding: 0;
      border: 0;
      background: none;
      color: var(--muted);
    }

    .storage-note i {
      display: grid;
      place-items: center;
      width: 22px;
      height: 22px;
      color: var(--warning);
      font-size: 13px;
    }

    /* Segmented tab control */
    .onboard-tabs {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 4px;
      padding: 4px;
      border-radius: 12px;
      background: var(--surface-2);
      border: 1px solid var(--line);
    }

    .onboard-tab {
      appearance: none;
      border: 0;
      background: transparent;
      color: var(--muted);
      font-family: inherit;
      font-size: 14px;
      font-weight: 700;
      padding: 11px 8px;
      border-radius: 9px;
      cursor: pointer;
      transition: background 0.18s ease, color 0.18s ease;
    }

    .onboard-tab i {
      margin-right: 6px;
      font-size: 12px;
    }

    .onboard-tab:hover { color: var(--text); }

    .onboard-tab.is-active {
      background: var(--accent);
      color: #fff;
      box-shadow: 0 4px 12px color-mix(in srgb, var(--accent) 36%, transparent);
    }

    .onboard-panel {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .onboard-panel-intro {
      margin: 0;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.55;
    }

    .onboard-panel[hidden] {
      display: none;
    }

    .btn-block {
      width: 100%;
      justify-content: center;
    }

    /* Divider with centered label */
    .onboard-divider {
      display: flex;
      align-items: center;
      gap: 12px;
      color: var(--muted);
      font-size: 11px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.1em;
    }

    .onboard-divider::before,
    .onboard-divider::after {
      content: "";
      flex: 1;
      height: 1px;
      background: var(--line);
    }

    .onboard-footer {
      display: flex;
      flex-direction: column;
      gap: 12px;
      padding-top: 4px;
    }

    .guest-button {
      border-color: color-mix(in srgb, var(--accent) 36%, var(--line));
      background: color-mix(in srgb, var(--accent) 8%, var(--surface-2));
      color: var(--text);
    }

    .guest-button:hover,
    .guest-button:focus-visible {
      background: color-mix(in srgb, var(--accent) 14%, var(--surface-2));
    }

    .text-link {
      appearance: none;
      border: 0;
      background: none;
      color: var(--accent-strong);
      font-family: inherit;
      font-size: 13px;
      font-weight: 700;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 7px;
      align-self: center;
      padding: 4px;
    }

    .text-link:hover { text-decoration: underline; }

    /* Bigger, comfortable buttons in the welcome/auth flow */
    .beta-body .btn-block,
    .auth-sheet .sheet-actions .primary-button {
      min-height: 50px;
      font-size: 15px;
      border-radius: 11px;
    }

    /* Welcome sheet on phones: fill the screen edge-to-edge, scroll inside */
    @media (max-width: 560px) {
      .beta-sheet {
        width: 100%;
        max-width: 100%;
        min-height: 100dvh;
        border-radius: 0;
      }

      .beta-hero {
        padding: 30px 20px 24px;
      }

      .beta-title { font-size: 27px; }

      .beta-body {
        padding: 18px 18px 28px;
      }

      .onboard-trust-row {
        grid-template-columns: 1fr;
      }
    }

    .storage-note strong,
    .storage-note span {
      display: block;
    }

    .storage-note strong {
      font-size: 12px;
      font-weight: 950;
    }

    .storage-note span {
      margin-top: 3px;
      color: var(--muted);
      font-size: 11px;
      line-height: 1.45;
    }

    .info-sheet {
      width: min(940px, 100%);
      max-height: calc(100vh - 36px);
      overflow: auto;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--surface);
      box-shadow: var(--shadow);
    }

    .sheet-header {
      position: sticky;
      top: 0;
      z-index: 2;
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      gap: 14px;
      padding: 18px;
      border-bottom: 1px solid var(--line);
      background: color-mix(in srgb, var(--surface) 96%, transparent);
      backdrop-filter: blur(12px);
    }

    .sheet-title {
      margin: 3px 0 0;
      color: var(--text);
      font-size: 28px;
      line-height: 1.08;
      font-weight: 950;
      letter-spacing: 0;
    }

    .sheet-body {
      padding: 18px;
    }

    .sheet-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 12px;
    }

    .sheet-section {
      border: 1px solid var(--line-soft);
      border-radius: var(--radius);
      padding: 14px;
      background: color-mix(in srgb, var(--surface-2) 78%, transparent);
    }

    .profile-form {
      display: grid;
      gap: 14px;
    }

    /* ── Onboarding welcome screen ── */
    .onboard-form {
      padding: 16px;
      border: 1px solid var(--line);
      border-radius: 8px;
      background: color-mix(in srgb, var(--surface-2) 70%, transparent);
    }

    .onboard-heading {
      margin: 0 0 14px;
      font-size: 15px;
      font-weight: 800;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .onboard-heading i { color: var(--accent); }

    .onboard-divider {
      display: flex;
      align-items: center;
      gap: 14px;
      margin: 14px 0;
      color: var(--subtle);
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.08em;
    }

    .onboard-divider::before,
    .onboard-divider::after {
      content: "";
      flex: 1;
      height: 1px;
      background: var(--line-soft);
    }

    .onboard-login-section {
      border: 1px solid var(--line-soft);
      border-radius: 8px;
      overflow: hidden;
    }

    .onboard-login-toggle {
      padding: 12px 16px;
      font-size: 13px;
      font-weight: 700;
      color: var(--muted);
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 8px;
      list-style: none;
      transition: color 0.15s;
    }

    .onboard-login-toggle:hover { color: var(--text); }
    .onboard-login-toggle::-webkit-details-marker { display: none; }
    .onboard-login-toggle::before { content: "\25B6"; font-size: 9px; transition: transform 0.2s; }
    details[open] .onboard-login-toggle::before { transform: rotate(90deg); }

    .onboard-login-form {
      padding: 0 16px 16px;
      display: grid;
      gap: 12px;
    }

    /* ── Password strength meter ── */
    .password-strength {
      margin-top: 6px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .strength-bar {
      flex: 1;
      height: 5px;
      background: var(--line-soft);
      border-radius: 3px;
      overflow: hidden;
    }

    .strength-fill {
      height: 100%;
      width: 0%;
      border-radius: 3px;
      transition: width 0.25s ease, background-color 0.25s ease;
    }

    .strength-fill[data-level="weak"]   { width: 25%; background: #e74c3c; }
    .strength-fill[data-level="fair"]   { width: 50%; background: #f39c12; }
    .strength-fill[data-level="good"]   { width: 75%; background: #27ae60; }
    .strength-fill[data-level="strong"] { width: 100%; background: #2ecc71; }

    .strength-label {
      font-size: 10px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.04em;
      color: var(--subtle);
      white-space: nowrap;
      min-width: 54px;
    }

    .auth-form {
      display: grid;
      gap: 14px;
    }

    .auth-backdrop {
      align-items: center;
      padding: 18px;
    }

    .auth-sheet {
      width: min(94vw, 430px);
      max-height: min(92dvh, 680px);
      overflow: auto;
    }

    .auth-sheet .sheet-header {
      padding: 16px 16px 10px;
    }

    .auth-sheet .sheet-body {
      padding: 0 16px 16px;
    }

    .auth-choice-row {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 6px;
      padding: 4px;
      border: 1px solid var(--line);
      border-radius: 12px;
      background: color-mix(in srgb, var(--surface-2) 78%, transparent);
    }

    .auth-choice {
      min-height: 48px;
      display: grid;
      place-items: center;
      gap: 4px;
      padding: 8px 7px;
      border: 0;
      border-radius: 9px;
      background: transparent;
      color: var(--text);
      font-size: 11px;
      font-weight: 900;
      text-align: center;
      transition: transform 150ms var(--motion-smooth, ease), border-color 150ms ease, background 150ms ease, color 150ms ease;
    }

    .auth-choice i {
      color: var(--accent);
      font-size: 15px;
    }

    .auth-choice:hover,
    .auth-choice:focus-visible,
    .auth-choice[aria-pressed="true"] {
      background: color-mix(in srgb, var(--accent) 14%, var(--surface-2));
      color: var(--text);
      outline: 0;
    }

    .auth-choice:disabled,
    .primary-button:disabled,
    .ghost-button:disabled {
      cursor: wait;
      opacity: 0.62;
      transform: none;
    }

    .field-hint {
      color: var(--subtle);
      font-size: 11px;
      line-height: 1.35;
    }

    .field-hint.good {
      color: var(--success);
      font-weight: 800;
    }

    .field-hint.bad {
      color: var(--danger);
      font-weight: 800;
    }

    .auth-copy {
      margin: 0;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.55;
    }

    .auth-forgot-link {
      justify-self: start;
      align-self: start;
      margin-top: -4px;
      padding: 2px 0;
      font-size: 12px;
    }

    .auth-grid {
      display: grid;
      gap: 12px;
    }

    .auth-field {
      display: grid;
      gap: 7px;
    }

    .auth-label {
      color: var(--text);
      font-size: 12px;
      font-weight: 800;
    }

    .muted-inline {
      color: var(--subtle);
      font-weight: 700;
    }

    .auth-status {
      min-height: 0;
      display: none;
      align-items: center;
      padding: 10px 12px;
      border: 1px solid var(--line-soft);
      border-radius: var(--radius);
      background: color-mix(in srgb, var(--surface-2) 86%, transparent);
      color: var(--muted);
      font-size: 12px;
      line-height: 1.5;
    }

    .auth-status:not(:empty) {
      display: grid;
    }

    .auth-status.success {
      border-color: color-mix(in srgb, var(--success) 42%, white);
      background: color-mix(in srgb, var(--success) 12%, var(--surface-2));
      color: color-mix(in srgb, var(--success) 82%, var(--text));
    }

    .auth-status.error {
      border-color: color-mix(in srgb, var(--danger) 50%, white);
      background: color-mix(in srgb, var(--danger) 10%, var(--surface-2));
      color: color-mix(in srgb, var(--danger) 82%, var(--text));
    }

    .auth-status.warning {
      border-color: color-mix(in srgb, var(--warning) 54%, white);
      background: color-mix(in srgb, var(--warning) 12%, var(--surface-2));
      color: color-mix(in srgb, var(--warning) 86%, var(--text));
    }

    .auth-status.info {
      border-color: color-mix(in srgb, var(--accent-strong) 46%, white);
      background: color-mix(in srgb, var(--accent-strong) 10%, var(--surface-2));
      color: color-mix(in srgb, var(--accent-strong) 82%, var(--text));
    }

    .auth-meta {
      display: grid;
      gap: 7px;
      padding: 12px;
      border: 1px solid var(--line-soft);
      border-radius: var(--radius);
      background: color-mix(in srgb, var(--surface-2) 82%, transparent);
    }

    .auth-meta strong {
      font-size: 12px;
      letter-spacing: 0.04em;
      text-transform: uppercase;
    }

    .auth-meta span {
      color: var(--muted);
      font-size: 12px;
      line-height: 1.5;
      word-break: break-word;
    }

    .auth-note {
      margin: 0;
      color: var(--subtle);
      font-size: 11px;
      line-height: 1.55;
    }

    .hidden-field {
      display: none;
    }

    .auth-fields {
      display: grid;
      gap: 12px;
    }

    .host-color-row {
      display: grid;
      grid-template-columns: auto 1fr 1fr;
      gap: 8px;
      align-items: center;
      margin: 12px 0;
      padding: 8px;
      border: 1px solid var(--line-soft);
      border-radius: 8px;
      background: color-mix(in srgb, var(--surface-2) 70%, transparent);
    }

    .host-color-row > span {
      color: var(--muted);
      font-size: 12px;
      font-weight: 900;
      text-transform: uppercase;
      letter-spacing: 0.06em;
    }

    .host-color-chip {
      min-height: 38px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 7px;
      border: 1px solid var(--line);
      border-radius: 7px;
      background: color-mix(in srgb, var(--surface) 65%, transparent);
      color: var(--text);
      font: inherit;
      font-size: 12px;
      font-weight: 900;
      cursor: pointer;
    }

    .host-color-chip.active {
      border-color: var(--accent);
      background: color-mix(in srgb, var(--accent) 15%, var(--surface-2));
      color: var(--accent-strong);
    }

    .auth-logged-in {
      display: grid;
      gap: 14px;
    }

    .auth-user-card {
      padding: 14px;
      border: 1px solid var(--line-soft);
      border-radius: var(--radius);
      background: color-mix(in srgb, var(--surface-2) 82%, transparent);
    }

    .auth-user-info { display: grid; gap: 4px; }
    .auth-welcome {
      margin: 0;
      color: var(--accent);
      font-size: 11px;
      font-weight: 900;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }
    .auth-user-name { font-weight: 800; font-size: 16px; margin: 0; }
    .auth-user-email { color: var(--muted); font-size: 12px; margin: 0; }
    .auth-user-rating { color: var(--accent); font-size: 13px; font-weight: 700; margin: 4px 0 0; }

    .profile-grid {
      display: grid;
      grid-template-columns: repeat(5, minmax(0, 1fr));
      gap: 10px;
    }

    .avatar-option {
      display: grid;
      gap: 7px;
      justify-items: center;
      min-height: 104px;
      padding: 10px 6px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: color-mix(in srgb, var(--surface-2) 72%, transparent);
      color: var(--muted);
      font-size: 10px;
      font-weight: 900;
      text-align: center;
      transition: transform 140ms ease, border-color 140ms ease, background 140ms ease;
    }

    .avatar-option:hover {
      transform: translateY(-2px);
      border-color: var(--accent-strong);
      background: color-mix(in srgb, var(--surface-3) 78%, transparent);
    }

    .avatar-option.selected {
      border-color: var(--success);
      box-shadow: inset 0 0 0 1px rgba(52, 211, 153, 0.35);
      color: var(--text);
    }

    .avatar-preview {
      --avatar-a: #7c89ff;
      --avatar-b: #34d399;
      width: 54px;
      height: 54px;
      display: grid;
      place-items: center;
      border-radius: 16px;
      background:
        radial-gradient(circle at 28% 22%, rgba(255, 255, 255, 0.42), transparent 24%),
        linear-gradient(135deg, var(--avatar-a), var(--avatar-b));
      color: #fff;
      font-size: 24px;
      box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.28), 0 10px 20px rgba(0, 0, 0, 0.20);
    }

    .sheet-section h3 {
      margin: 0 0 7px;
      color: var(--text);
      font-size: 14px;
      font-weight: 920;
      line-height: 1.2;
    }

    .sheet-section p,
    .sheet-section li {
      color: var(--muted);
      font-size: 13px;
      line-height: 1.52;
    }

    .sheet-section p {
      margin: 0;
    }

    .sheet-section ul {
      display: grid;
      gap: 6px;
      margin: 0;
      padding-left: 18px;
    }

    .faq-list {
      display: grid;
      gap: 10px;
    }

    .faq-list details {
      border: 1px solid var(--line-soft);
      border-radius: var(--radius);
      background: rgba(0, 0, 0, 0.18);
    }

    .faq-list summary {
      min-height: 48px;
      display: flex;
      align-items: center;
      padding: 0 14px;
      color: var(--text);
      font-size: 14px;
      font-weight: 900;
      cursor: pointer;
    }

    .faq-list p {
      margin: 0;
      padding: 0 14px 14px;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.52;
    }

    .contact-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 12px;
      margin-top: 12px;
    }

    .contact-link {
      display: flex;
      align-items: center;
      gap: 10px;
      min-height: 54px;
      padding: 0 14px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--surface-2);
      color: var(--text);
      text-decoration: none;
      font-size: 13px;
      font-weight: 900;
    }

    .contact-link i {
      color: var(--accent-strong);
    }

    .sheet-actions {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 14px;
    }

    .mobile-video-dock {
      position: fixed;
      right: 12px;
      bottom: 12px;
      z-index: 60;
      display: none;
      width: min(292px, calc(100vw - 24px));
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: rgba(9, 12, 18, 0.92);
      box-shadow: 0 18px 48px rgba(0, 0, 0, 0.42);
      backdrop-filter: blur(14px);
      overflow: hidden;
    }

    .mobile-video-head {
      min-height: 34px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
      padding: 0 8px 0 10px;
      border-bottom: 1px solid var(--line-soft);
      color: var(--muted);
      font-size: 11px;
      font-weight: 900;
    }

    .mobile-video-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 8px;
      padding: 8px;
    }

    .mobile-video-tile {
      position: relative;
      overflow: hidden;
      aspect-ratio: 4 / 3;
      border: 1px solid var(--line-soft);
      border-radius: var(--radius);
      background: #05070b;
    }

    .mobile-video-tile video {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .mobile-video-label {
      position: absolute;
      left: 6px;
      bottom: 5px;
      z-index: 2;
      padding: 2px 6px;
      border-radius: 999px;
      background: rgba(0, 0, 0, 0.62);
      color: #fff;
      font-size: 9px;
      font-weight: 900;
    }

    .mobile-video-tile .preview-controls {
      top: 5px;
      right: 5px;
      gap: 4px;
    }

    .mobile-video-tile .preview-control {
      width: 25px;
      height: 25px;
      font-size: 10px;
    }

    .mobile-video-mask {
      position: absolute;
      inset: 0;
      display: grid;
      place-items: center;
      background: rgba(5, 7, 11, 0.86);
      color: var(--subtle);
      font-size: 15px;
    }

    .mobile-video-tile .local-video-mask {
      padding: 8px;
      font-size: 10px;
    }

    .mobile-video-tile .local-video-mask i {
      width: 28px;
      height: 28px;
      margin-bottom: 4px;
      font-size: 12px;
    }

    .mobile-video-dock.collapsed {
      width: 170px;
    }

    .mobile-video-dock.collapsed .mobile-video-grid {
      display: none;
    }

    @media (max-width: 1180px) {
      .app-shell {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto;
        height: auto;
        min-height: calc(100vh - 68px);
        overflow: auto;
      }

      body {
        overflow: auto;
      }

      .game-area {
        overflow: visible;
      }

      .video-pane {
        min-height: auto;
        border-left: 0;
        border-top: 1px solid var(--line);
      }

      .video-scroll {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 14px;
      }

      .video-card {
        margin-bottom: 0;
      }

      .device-panel {
        grid-column: 1 / -1;
      }
    }

    @media (max-width: 860px) {
      .app-header {
        gap: 12px;
      }

      .trust-pill {
        display: none;
      }

      .game-area {
        grid-template-columns: 1fr;
      }

      .records-rail {
        order: 3;
        overflow: visible;
      }

      .board-column {
        order: 1;
        min-height: auto;
      }

      .side-panel {
        order: 2;
      }

      .side-panel {
        min-height: 0;
      }

      .mobile-video-dock {
        display: block;
      }
    }

    @media (max-width: 620px) {
      .app-header {
        height: 58px;
        align-items: center;
        flex-direction: row;
        justify-content: space-between;
        gap: 8px;
        padding: 8px 10px;
      }

      .brand-lockup {
        flex: 1 1 auto;
        min-width: 0;
      }

      .brand-mark {
        width: 38px;
        height: 38px;
      }

      .brand-copy strong {
        max-width: 132px;
        font-size: 15px;
        overflow: hidden;
        text-overflow: ellipsis;
      }

      .brand-copy span {
        display: none;
      }

      .mobile-menu-button {
        display: inline-flex;
        flex: 0 0 auto;
      }

      .app-nav {
        position: absolute;
        top: calc(100% + 8px);
        left: 10px;
        right: 10px;
        z-index: 70;
        display: none;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 6px;
        min-width: 0;
        padding: 8px;
        border: 1px solid var(--line);
        border-radius: var(--radius);
        background: color-mix(in srgb, var(--surface) 96%, transparent);
        box-shadow: var(--shadow);
        backdrop-filter: blur(14px);
      }

      .app-header.nav-open .app-nav {
        display: grid;
      }

      .nav-button {
        min-height: 34px;
        padding: 0 8px;
      }

      .mobile-video-dock {
        right: 8px;
        bottom: 8px;
        width: min(196px, calc(100vw - 16px));
      }

      .mobile-video-head {
        min-height: 28px;
        padding: 0 6px 0 8px;
        font-size: 10px;
      }

      .mobile-video-grid {
        gap: 6px;
        padding: 6px;
      }

      .mobile-video-tile {
        aspect-ratio: 4 / 3;
      }

      .mobile-video-label {
        left: 4px;
        bottom: 4px;
        padding: 2px 5px;
        font-size: 8px;
      }

      .mobile-video-tile .preview-controls {
        top: 4px;
        right: 4px;
      }

      .mobile-video-tile .preview-control {
        width: 22px;
        height: 22px;
        font-size: 9px;
      }

      .mobile-video-dock.collapsed {
        width: 146px;
      }

      .game-area {
        padding: 10px 10px 124px;
        gap: 12px;
      }

      .app-shell {
        min-height: calc(100vh - 58px);
      }

      .top-bar {
        align-items: flex-start;
        flex-direction: column;
      }

      .toolbar {
        width: 100%;
        justify-content: space-between;
      }

      .board-frame {
        border-width: 4px;
      }

      .video-scroll {
        grid-template-columns: 1fr;
      }

      .join-row,
      .copy-row {
        grid-template-columns: 1fr;
      }

      .copy-row .icon-button {
        width: 100%;
      }

      .sheet-grid,
      .contact-grid,
      .profile-grid,
      .support-actions {
        grid-template-columns: 1fr;
      }

      .beta-hero {
        grid-template-columns: 1fr;
        gap: 10px;
        padding: 16px;
      }

      .beta-title {
        font-size: 24px;
      }

      .beta-points {
        grid-template-columns: 1fr;
      }

      .sheet-title {
        font-size: 23px;
      }
    }

    /* Toast Notification Styles */
    .toast-notification {
      position: fixed;
      bottom: 24px;
      left: 50%;
      transform: translateX(-50%) translateY(100px);
      background: var(--surface-3);
      color: var(--text);
      padding: 12px 24px;
      border-radius: 999px;
      box-shadow: var(--shadow);
      font-weight: 800;
      font-size: 13px;
      z-index: 1000;
      opacity: 0;
      transition: transform 0.3s ease, opacity 0.3s ease;
      border: 1px solid var(--accent);
      pointer-events: none;
    }

    .toast-notification.show {
      transform: translateX(-50%) translateY(0);
      opacity: 1;
    }

    /* Bot Thinking Animation */
    .bot-thinking {
      color: var(--accent);
      font-weight: 800;
      animation: pulse-text 1.5s infinite;
    }

    @keyframes pulse-text {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.4; }
    }

    /* Chessmate newspaper skin */
    :root,
    :root[data-appearance="light"] {
      color-scheme: light;
      --paper: #f2ecdd;
      --paper-2: #ece4d1;
      --paper-3: #e4dac2;
      --ink: #221d16;
      --ink-soft: #544a3b;
      --ink-faint: #81745f;
      --rule: #cabfa3;
      --rule-soft: #d8cfb6;
      --oxblood: #8a2b27;
      --oxblood-deep: #6f211e;
      --brass: #9c7320;
      --forest: #3f5f3a;
      --board-frame: #3a2a1b;
      --bg: var(--paper);
      --surface: var(--paper);
      --surface-2: var(--paper-2);
      --surface-3: var(--paper-3);
      --line: var(--rule);
      --line-soft: var(--rule-soft);
      --text: var(--ink);
      --muted: var(--ink-soft);
      --subtle: var(--ink-faint);
      --accent: var(--oxblood);
      --accent-strong: var(--oxblood-deep);
      --success: var(--forest);
      --warning: var(--brass);
      --danger: #a93c38;
      --radius: 3px;
      --shadow: 0 26px 54px rgba(58, 42, 27, 0.18);
      --light-square: #ecd6ad;
      --dark-square: #a9794c;
      --light-coord: #9a6a3c;
      --dark-coord: #f6ead0;
      --serif: "Fraunces", Georgia, serif;
      --sans: "Hanken Grotesk", Inter, system-ui, sans-serif;
    }

    :root[data-appearance="dark"] {
      color-scheme: dark;
      --paper: #15120e;
      --paper-2: #1a1612;
      --paper-3: #201b14;
      --ink: #f2ecdd;
      --ink-soft: #ddc0bd;
      --ink-faint: #9e9178;
      --rule: #564240;
      --rule-soft: #2d2822;
      --oxblood: #a23d37;
      --oxblood-deep: #c44b43;
      --primary-bright: #ffb3ac;
      --brass: #d9c49c;
      --forest: #8caf76;
      --board-frame: #120e0a;
      --bg: var(--paper);
      --surface: var(--paper);
      --surface-2: var(--paper-2);
      --surface-3: var(--paper-3);
      --line: var(--rule);
      --line-soft: var(--rule-soft);
      --text: var(--ink);
      --muted: var(--ink-soft);
      --subtle: var(--ink-faint);
      --accent: var(--oxblood);
      --accent-strong: var(--oxblood-deep);
      --success: var(--forest);
      --warning: var(--brass);
      --danger: #f08a83;
      --shadow: 0 28px 58px rgba(0, 0, 0, 0.5);
      --light-square: #ecd6ad;
      --dark-square: #a9794c;
      --light-coord: #9a6a3c;
      --dark-coord: #f6ead0;
    }

    body {
      overflow: auto;
      background: var(--paper);
      color: var(--ink);
      font-family: var(--sans);
      line-height: 1.45;
      -webkit-font-smoothing: antialiased;
    }

    body::before,
    body::after {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
    }

    body::before {
      z-index: 0;
      opacity: 0.045;
      mix-blend-mode: multiply;
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E");
    }

    body::after {
      z-index: 0;
      background: radial-gradient(120% 90% at 50% 0%, transparent 56%, rgba(60, 42, 24, 0.10) 100%);
    }

    :root[data-appearance="dark"] body::before {
      opacity: 0.08;
      mix-blend-mode: screen;
    }

    :root[data-appearance="dark"] body::after {
      background: radial-gradient(120% 90% at 50% 0%, transparent 52%, rgba(0, 0, 0, 0.34) 100%);
    }

    .app-header,
    .app-shell,
    .mobile-video-dock {
      position: relative;
      z-index: 1;
    }

    /* The header (and its dropdown menus) must sit above the content panels,
       which each create their own stacking context via contain:layout. Kept
       below the modal backdrops (80+) so dialogs still cover the header. */
    .app-header {
      z-index: 50;
    }

    .app-header {
      height: auto;
      display: grid;
      grid-template-columns: 1fr;
      gap: 10px;
      padding: 18px 26px 14px;
      border-bottom: 3px double var(--ink);
      background: color-mix(in srgb, var(--paper) 94%, transparent);
      backdrop-filter: blur(10px);
      box-shadow: none;
    }

    .edition-strip {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      padding-bottom: 8px;
      border-bottom: 1px solid var(--rule);
      color: var(--ink-faint);
      font-size: 11px;
      font-weight: 800;
      text-transform: uppercase;
    }

    .edition-strip span:nth-child(2) {
      color: var(--oxblood);
    }

    .masthead-row {
      display: grid;
      grid-template-columns: minmax(240px, auto) minmax(320px, 1fr) auto auto auto;
      align-items: center;
      gap: 14px;
    }

    .brand-lockup {
      min-width: 0;
      gap: 13px;
    }

    .brand-mark {
      width: 34px;
      height: 34px;
      border-radius: 3px;
      border: 0;
      background: transparent;
      box-shadow: none;
    }

    .brand-mark svg {
      color: var(--oxblood);
      width: 34px;
      height: 34px;
    }

    .brand-copy {
      gap: 3px;
    }

    .brand-copy strong {
      color: var(--primary-bright, var(--accent));
      font-family: var(--serif);
      font-size: 46px;
      font-weight: 650;
      line-height: 0.9;
      letter-spacing: 0;
    }

    .brand-copy span {
      color: var(--ink-soft);
      font-family: var(--serif);
      font-size: 15px;
      font-style: italic;
      font-weight: 500;
      letter-spacing: 0;
    }

    .app-nav {
      justify-content: flex-end;
      flex-wrap: wrap;
      gap: 6px;
      padding: 4px 0;
    }

    .nav-button {
      min-height: 32px;
      padding: 0 10px;
      border: 1px solid transparent;
      border-bottom: 2px solid transparent;
      border-radius: 2px;
      color: var(--ink-soft);
      font-size: 12px;
      font-weight: 800;
      letter-spacing: 0;
      text-transform: uppercase;
      transition: color 0.15s ease, border-color 0.15s ease;
    }

    .nav-button:hover,
    .nav-button:focus-visible {
      background: transparent;
      border-color: transparent;
      border-bottom-color: var(--accent);
      color: var(--accent);
    }

    .trust-pill {
      min-height: 32px;
      border-color: color-mix(in srgb, var(--forest) 55%, var(--rule));
      background: color-mix(in srgb, var(--forest) 12%, transparent);
      color: var(--forest);
      border-radius: 999px;
      letter-spacing: 0;
    }

    .trust-pill i {
      color: var(--forest);
    }

    .app-shell {
      grid-template-columns: minmax(0, 1fr) 340px;
      height: auto;
      min-height: calc(100vh - 138px);
    }

    .game-area {
      grid-template-columns: minmax(0, 1fr) 348px;
      gap: 22px;
      padding: 20px 24px 26px;
      overflow: visible;
    }

    .board-column {
      justify-content: flex-start;
      min-height: 0;
    }

    .player-card,
    .panel,
    .video-card,
    .device-panel,
    .diagnostics,
    .info-sheet {
      border-color: var(--rule);
      background: color-mix(in srgb, var(--paper-2) 84%, transparent);
      box-shadow: var(--shadow);
    }

    .turn-dot {
      width: 12px;
      height: 12px;
      border-color: var(--ink);
      box-shadow: 0 0 0 3px color-mix(in srgb, var(--ink) 8%, transparent);
    }

    .turn-dot.black {
      background: var(--ink);
      border-color: var(--ink);
    }

    .eyebrow {
      color: var(--ink-faint);
      font-size: 11px;
      font-weight: 800;
      letter-spacing: 0;
    }

    .headline {
      color: var(--ink);
      font-family: var(--serif);
      font-size: 21px;
      font-weight: 650;
      letter-spacing: 0;
    }

    .status-text,
    .panel-copy,
    .player-detail,
    .support-list,
    .attribution,
    .device-row,
    .media-safety-note span,
    .beta-copy,
    .beta-point span,
    .storage-note span,
    .sheet-section p,
    .sheet-section li,
    .faq-list p {
      color: var(--ink-soft);
    }

    .icon-button,
    .text-button,
    .primary-button,
    .ghost-button,
    .join-input,
    .room-id,
    .contact-link,
    .avatar-option,
    .promotion-button {
      border-radius: 2px;
      border-color: var(--rule);
      background: transparent;
      color: var(--ink);
    }

    .text-button,
    .primary-button,
    .ghost-button {
      min-height: 38px;
      font-size: 12px;
      font-weight: 800;
      letter-spacing: 0;
    }

    .primary-button {
      background: var(--oxblood);
      border-color: var(--oxblood);
      color: #f8ead0;
    }

    .ghost-button {
      color: var(--ink-soft);
    }

    .icon-button:hover,
    .text-button:hover,
    .primary-button:hover,
    .ghost-button:hover,
    .contact-link:hover,
    .avatar-option:hover {
      transform: translateY(-1px);
      border-color: var(--ink);
      background: var(--ink);
      color: var(--paper);
    }

    .primary-button:hover {
      background: var(--oxblood-deep);
      border-color: var(--oxblood-deep);
      color: #fff6e6;
    }

    .role-badge {
      border-color: color-mix(in srgb, var(--oxblood) 42%, var(--rule));
      background: color-mix(in srgb, var(--oxblood) 10%, transparent);
      color: var(--oxblood);
      border-radius: 999px;
      letter-spacing: 0;
    }

    .player-card {
      width: var(--board-width);
      padding: 7px 12px;
      background: var(--paper-2);
    }

    .player-card.top,
    .player-card.bottom {
      border-radius: 0;
      background: var(--paper-2);
    }

    /* Keep the top card's three-column layout in newspaper mode */
    .player-card.top {
      grid-template-columns: 1fr auto auto;
    }

    .player-card-actions .icon-button {
      border-color: transparent;
      color: var(--ink-soft);
    }

    .player-card-actions .icon-button:hover {
      border-color: var(--rule);
      background: var(--paper-3);
      color: var(--ink);
      transform: none;
    }

    .avatar {
      border-radius: 2px;
      border-color: var(--rule);
      background: var(--paper-3);
      color: var(--oxblood);
    }

    .avatar.white {
      background: linear-gradient(135deg, #f8efdc, #dcc79d);
      color: var(--ink);
    }

    .avatar.black {
      background: linear-gradient(135deg, #332617, #17100a);
      color: #f8efdc;
    }

    .player-name {
      color: var(--ink);
      font-family: var(--serif);
      font-size: 15px;
      font-weight: 650;
    }

    .clock {
      min-width: 76px;
      border-color: var(--rule);
      background: color-mix(in srgb, var(--paper) 70%, transparent);
      color: var(--ink);
      font-family: var(--serif);
      font-size: 17px;
      font-weight: 650;
    }

    .clock.active {
      border-color: var(--forest);
      box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--forest) 28%, transparent);
    }

    .board-frame {
      width: min(100%, 590px);
      border: 18px solid var(--board-frame);
      border-radius: 3px;
      background: var(--board-frame);
      box-shadow:
        0 1px 0 rgba(255, 255, 255, 0.08) inset,
        0 0 0 1px rgba(242, 236, 221, 0.10),
        0 30px 64px rgba(0, 0, 0, 0.55);
    }

    .board-frame::after {
      content: "";
      position: absolute;
      inset: 7px;
      z-index: 6;
      border: 4px double rgba(242, 236, 221, 0.30);
      border-radius: 2px;
      pointer-events: none;
    }

    .chessboard {
      border: 1px solid rgba(0, 0, 0, 0.28);
    }

    .square.last-move::before {
      background: rgba(156, 115, 32, 0.28);
      box-shadow: inset 0 0 0 2px rgba(156, 115, 32, 0.42);
    }

    .square.selected::after {
      border-color: var(--oxblood);
      background: color-mix(in srgb, var(--oxblood) 18%, transparent);
    }

    .square.drag-over::after {
      border-color: var(--forest);
      border-radius: 3px;
    }

    .piece-img {
      width: 88%;
      height: 88%;
      filter: drop-shadow(0 5px 5px rgba(48, 31, 17, 0.32));
    }

    .hint.move {
      background: rgba(34, 29, 22, 0.24);
    }

    .hint.capture {
      border-color: rgba(34, 29, 22, 0.22);
    }

    .panel {
      padding: 15px;
      border-radius: 3px;
    }

    .panel-title,
    .sheet-section h3,
    .faq-list summary,
    .video-name,
    .media-safety-note strong,
    .beta-title,
    .beta-point strong,
    .storage-note strong,
    .sheet-title {
      color: var(--ink);
      font-family: var(--serif);
      font-weight: 650;
      letter-spacing: 0;
    }

    .panel-title {
      font-size: 17px;
    }

    .panel-title i,
    .contact-link i {
      color: var(--oxblood);
    }

    .join-input,
    .room-id,
    .match-log,
    .faq-list details,
    .sheet-section,
    .beta-point,
    .storage-note {
      background: color-mix(in srgb, var(--paper) 68%, transparent);
    }

    .join-input,
    .room-id {
      color: var(--ink);
    }

    .match-log {
      color: var(--ink-soft);
      border-color: var(--rule-soft);
      font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    }

    .log-entry.move,
    .log-entry.success {
      color: var(--forest);
    }

    .log-entry.media,
    .log-entry.net {
      color: var(--oxblood);
    }

    .attribution a {
      color: var(--oxblood);
    }

    .video-pane {
      border-left-color: var(--rule);
      background: color-mix(in srgb, var(--paper-2) 90%, transparent);
    }

    .video-header {
      min-height: 68px;
      border-bottom-color: var(--rule);
    }

    .live-dot {
      background: var(--oxblood);
      box-shadow: 0 0 0 5px color-mix(in srgb, var(--oxblood) 12%, transparent);
    }

    .video-card {
      border-radius: 3px;
      border-color: var(--board-frame);
      background:
        linear-gradient(135deg, color-mix(in srgb, var(--paper-2) 82%, white), var(--paper-3));
    }

    .video-card::after {
      content: "";
      position: absolute;
      inset: 6px;
      z-index: 2;
      border: 1px solid rgba(58, 42, 27, 0.26);
      pointer-events: none;
    }

    .video-caption {
      z-index: 5;
      padding: 28px 12px 12px;
      background: linear-gradient(to top, rgba(34, 29, 22, 0.82), transparent);
    }

    .media-state-card,
    .preview-control,
    .status-pill {
      border-radius: 2px;
      border-color: rgba(242, 236, 221, 0.26);
      background: rgba(34, 29, 22, 0.58);
      color: #fff6e6;
    }

    .media-state-card {
      width: min(250px, calc(100% - 108px));
      box-shadow: 0 12px 28px rgba(34, 29, 22, 0.16);
    }

    .media-state-card.safe {
      border-color: rgba(63, 95, 58, 0.34);
      background: rgba(242, 236, 221, 0.88);
      color: var(--ink);
    }

    .media-state-card.safe .media-state-title {
      color: var(--ink);
    }

    .media-state-card.safe .media-state-copy {
      color: var(--ink-soft);
    }

    .media-state-card.safe .media-state-icon {
      background: color-mix(in srgb, var(--forest) 14%, var(--paper-2));
      color: var(--forest);
    }

    .media-state-icon {
      color: var(--forest);
    }

    .preview-controls {
      top: 10px;
      right: 10px;
      gap: 7px;
    }

    .preview-control {
      width: 34px;
      height: 34px;
      border-color: rgba(242, 236, 221, 0.30);
      color: #f6ead0;
    }

    .preview-control.off {
      color: #f3c2b9;
      background: rgba(138, 43, 39, 0.46);
    }

    .video-caption .status-icons {
      display: none;
    }

    .status-pill {
      width: 23px;
      height: 23px;
      color: #cfe0c0;
      font-size: 10px;
    }

    .status-pill.off {
      color: #f3c2b9;
    }

    .remote-mask,
    .local-video-mask {
      background: color-mix(in srgb, var(--ink) 82%, transparent);
    }

    .remote-mask p {
      color: #fff6e6;
    }

    .media-safety-note {
      border-color: color-mix(in srgb, var(--forest) 38%, var(--rule));
      background: color-mix(in srgb, var(--forest) 10%, transparent);
    }

    .media-safety-note i {
      background: color-mix(in srgb, var(--paper) 58%, transparent);
      color: var(--forest);
    }

    .switch {
      border-color: var(--forest);
      background: var(--forest);
    }

    .switch.off {
      border-color: var(--rule);
      background: var(--paper-3);
    }

    .switch.off::after {
      background: var(--ink-faint);
    }

    .diagnostics {
      background: color-mix(in srgb, var(--paper-3) 72%, transparent);
      border-color: var(--rule);
    }

    .diag-value {
      color: var(--oxblood);
    }

    .sheet-backdrop {
      background: rgba(34, 29, 22, 0.58);
    }

    .beta-backdrop {
      background:
        radial-gradient(circle at 78% 16%, color-mix(in srgb, var(--oxblood) 20%, transparent), transparent 32%),
        radial-gradient(circle at 18% 82%, color-mix(in srgb, var(--forest) 18%, transparent), transparent 30%),
        rgba(34, 29, 22, 0.72);
    }

    .info-sheet {
      border-radius: 3px;
      background: var(--paper);
    }

    .sheet-header,
    .beta-hero {
      border-bottom-color: var(--rule);
      background: color-mix(in srgb, var(--paper) 94%, transparent);
    }

    .beta-icon,
    .overlay-icon {
      border-radius: 3px;
      border-color: color-mix(in srgb, var(--oxblood) 34%, var(--rule));
      background: color-mix(in srgb, var(--oxblood) 12%, transparent);
      color: var(--oxblood);
    }

    .beta-kicker {
      color: var(--oxblood);
      letter-spacing: 0;
    }

    .overlay {
      background: rgba(34, 29, 22, 0.72);
    }

    .overlay-box {
      border-color: var(--rule);
      border-radius: 3px;
      background: var(--paper);
    }

    .overlay-title {
      color: var(--ink);
      font-family: var(--serif);
      font-weight: 650;
    }

    .overlay-desc {
      color: var(--ink-soft);
    }

    .mobile-video-dock {
      border-color: var(--rule);
      border-radius: 3px;
      background: color-mix(in srgb, var(--paper-2) 94%, transparent);
    }

    .mobile-video-head {
      border-bottom-color: var(--rule-soft);
      color: var(--ink-soft);
    }

    .mobile-video-label {
      border-radius: 2px;
      background: rgba(34, 29, 22, 0.72);
    }

    @media (max-width: 1180px) {
      .app-shell {
        grid-template-columns: 1fr;
        min-height: 0;
      }

      .video-pane {
        border-left: 0;
        border-top: 1px solid var(--rule);
      }
    }

    @media (max-width: 980px) {
      .masthead-row {
        grid-template-columns: minmax(0, 1fr) auto auto;
      }

      .app-nav {
        position: absolute;
        top: calc(100% + 8px);
        left: 14px;
        right: 14px;
        z-index: 70;
        display: none;
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 6px;
        padding: 8px;
        border: 1px solid var(--rule);
        border-radius: 3px;
        background: color-mix(in srgb, var(--paper) 96%, transparent);
        box-shadow: var(--shadow);
      }

      .app-header.nav-open .app-nav {
        display: grid;
      }

      .mobile-menu-button {
        display: inline-flex;
      }

      .trust-pill {
        display: none;
      }
    }

    @media (max-width: 860px) {
      .game-area {
        grid-template-columns: 1fr;
      }

      .side-panel {
        min-height: 0;
      }

      .mobile-video-dock {
        display: block;
      }
    }

    @media (max-width: 620px) {
      .app-header {
        height: auto;
        padding: 8px 10px;
        gap: 6px;
      }

      .edition-strip {
        display: none;
      }

      .masthead-row {
        grid-template-columns: minmax(0, 1fr) auto auto;
        gap: 8px;
      }

      .brand-mark {
        width: 30px;
        height: 30px;
      }

      .brand-copy strong {
        max-width: 150px;
        font-size: 28px;
        overflow: hidden;
        text-overflow: ellipsis;
      }

      .brand-copy span {
        display: none;
      }

      .app-nav {
        left: 10px;
        right: 10px;
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .game-area {
        padding: 10px 10px 126px;
        gap: 12px;
      }

      .top-bar {
        width: 100%;
        align-items: flex-start;
        flex-direction: column;
      }

      .headline {
        font-size: 23px;
      }

      .player-card,
      .board-frame {
        width: 100%;
      }

      .board-frame {
        border-width: 9px;
      }

      .mobile-video-dock {
        right: 8px;
        bottom: 8px;
        width: min(200px, calc(100vw - 16px));
      }

      .sheet-grid,
      .contact-grid,
      .profile-grid,
      .support-actions {
        grid-template-columns: 1fr;
      }
    }
    /* ===== Scoresheet & game review ===== */
    .scoresheet-panel {
      display: flex;
      flex-direction: column;
    }

    .scoresheet-status {
      font-family: var(--sans);
      font-size: 10px;
      font-weight: 800;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      padding: 3px 9px;
      border-radius: 999px;
      border: 1px solid var(--rule);
      color: var(--ink-soft);
      white-space: nowrap;
    }

    .scoresheet-status.live {
      color: var(--forest);
      border-color: color-mix(in srgb, var(--forest) 45%, var(--rule));
      background: color-mix(in srgb, var(--forest) 10%, transparent);
    }

    .scoresheet-status.reviewing {
      color: var(--warning);
      border-color: color-mix(in srgb, var(--warning) 48%, var(--rule));
      background: color-mix(in srgb, var(--warning) 12%, transparent);
    }

    .scoresheet-nav {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 6px;
      margin-bottom: 10px;
    }

    .scoresheet-nav .icon-button {
      width: 100%;
      min-height: 34px;
    }

    .scoresheet-nav .icon-button:disabled {
      opacity: 0.32;
      pointer-events: none;
    }

    .scoresheet-moves {
      flex: 1 1 auto;
      min-height: 132px;
      max-height: 300px;
      overflow: auto;
      padding: 0;
      border-radius: 3px;
      border: 1px solid var(--rule-soft);
      background: color-mix(in srgb, var(--paper) 68%, transparent);
    }

    .scoresheet-empty {
      padding: 22px 12px;
      text-align: center;
      color: var(--ink-faint);
      font-size: 12px;
      font-style: italic;
      font-family: var(--serif);
    }

    .scoresheet-row {
      display: grid;
      grid-template-columns: 36px 1fr 1fr;
      align-items: stretch;
      border-bottom: 1px solid var(--rule-soft);
    }

    .scoresheet-row:last-child {
      border-bottom: 0;
    }

    .scoresheet-no {
      display: flex;
      align-items: center;
      justify-content: center;
      font-family: var(--serif);
      font-size: 13px;
      font-weight: 650;
      color: var(--ink-faint);
      background: color-mix(in srgb, var(--paper-3) 48%, transparent);
    }

    .scoresheet-ply {
      appearance: none;
      border: 0;
      border-left: 1px solid var(--rule-soft);
      background: transparent;
      text-align: left;
      margin: 0;
      padding: 8px 10px;
      min-height: 33px;
      font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
      font-size: 12.5px;
      font-weight: 700;
      color: var(--ink);
      cursor: pointer;
      transition: background 0.12s ease, color 0.12s ease;
    }

    .scoresheet-ply.empty {
      cursor: default;
      color: var(--ink-faint);
    }

    .scoresheet-ply:not(.empty):hover {
      background: var(--ink);
      color: var(--paper);
    }

    .scoresheet-ply.active {
      background: var(--oxblood);
      color: #f8ead0;
    }

    .scoresheet-ply.active:hover {
      background: var(--oxblood-deep);
      color: #fff6e6;
    }

    .board-frame.reviewing {
      box-shadow:
        0 0 0 2px var(--warning),
        0 1px 0 rgba(255, 255, 255, 0.08) inset,
        0 28px 56px rgba(58, 42, 27, 0.30);
    }

    /* ===== Match video strip (mobile) ===== */
    /* Toolbar toggle: mobile only */
    #btn-video-toggle {
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    #btn-video-toggle.active,
    #btn-video-panel-toggle.active {
      border-color: var(--oxblood);
      background: var(--oxblood);
      color: #f8ead0;
    }

    /* Reset the old floating dock into an inline strip above the board */
    .mobile-video-dock {
      position: static;
      inset: auto;
      right: auto;
      bottom: auto;
      top: auto;
      left: auto;
      width: min(100%, 590px);
      margin: 0 0 4px;
      display: none;
      backdrop-filter: none;
      box-shadow: none;
    }

    .mobile-video-dock.open {
      display: block;
    }

    .mobile-video-head {
      cursor: default;
      user-select: none;
    }

    @media (max-width: 1180px) {
      /* Footer video pane is replaced by the toolbar-toggled strip on phones */
      .video-pane {
        display: none;
      }

      #btn-video-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
      }

      .mobile-video-dock.open {
        display: block;
      }

      .mobile-video-dock .mobile-video-tile {
        aspect-ratio: auto;
        height: 104px;
      }
    }

    @media (max-width: 620px) {
      .mobile-video-dock .mobile-video-tile {
        height: 92px;
      }
    }
    /* ===== Start / welcome screen + time controls ===== */
    .start-box {
      max-width: 390px;
      width: min(92%, 390px);
      padding: 18px;
      background:
        linear-gradient(180deg, color-mix(in srgb, var(--paper) 94%, transparent), color-mix(in srgb, var(--paper-2) 96%, transparent));
      box-shadow:
        0 24px 70px rgba(0, 0, 0, 0.36),
        0 0 0 1px color-mix(in srgb, var(--brass) 26%, transparent);
    }

    .start-overlay {
      background:
        radial-gradient(circle at 50% 38%, rgba(192, 71, 63, 0.18), transparent 32%),
        radial-gradient(circle at 50% 54%, rgba(12, 10, 7, 0.36), rgba(12, 10, 7, 0.88) 68%),
        rgba(12, 10, 7, 0.82);
      backdrop-filter: blur(14px) saturate(0.9);
    }

    .start-box .overlay-icon {
      width: 46px;
      height: 46px;
      margin-bottom: 8px;
      font-size: 20px;
    }

    .start-kicker {
      margin: 0 0 3px;
      font-family: var(--sans);
      font-size: 10px;
      font-weight: 800;
      letter-spacing: 0.22em;
      text-transform: uppercase;
      color: var(--oxblood);
    }

    .start-mode-grid {
      display: grid;
      gap: 7px;
      width: 100%;
      margin: 12px 0 12px;
    }

    .start-mode-card {
      appearance: none;
      display: grid;
      grid-template-columns: 28px minmax(0, 1fr);
      grid-template-rows: auto auto;
      align-items: center;
      gap: 1px 10px;
      width: 100%;
      min-height: 56px;
      padding: 9px 11px;
      border: 1px solid var(--rule);
      border-radius: 6px;
      background: color-mix(in srgb, var(--paper-2) 72%, transparent);
      color: var(--ink);
      text-align: left;
      cursor: pointer;
      transition: border-color 0.14s ease, background 0.14s ease, transform 0.1s ease;
    }

    .start-mode-card:hover {
      border-color: var(--ink-faint);
      background: color-mix(in srgb, var(--paper-2) 92%, transparent);
    }

    .start-mode-card:active {
      transform: scale(0.985);
    }

    .start-mode-card.selected {
      border-color: var(--oxblood);
      background: color-mix(in srgb, var(--oxblood) 12%, var(--paper-2));
      box-shadow: 0 0 0 3px color-mix(in srgb, var(--oxblood) 12%, transparent);
    }

    .start-mode-card i {
      grid-row: 1 / span 2;
      width: 28px;
      height: 28px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      color: var(--oxblood);
      background: color-mix(in srgb, var(--oxblood) 10%, transparent);
    }

    .start-mode-card span {
      min-width: 0;
      font-family: var(--sans);
      font-size: 11px;
      font-weight: 900;
      letter-spacing: 0.02em;
      text-transform: uppercase;
    }

    .start-mode-card small {
      min-width: 0;
      color: var(--muted);
      font-family: var(--sans);
      font-size: 10.5px;
      font-weight: 600;
      line-height: 1.25;
    }

    .time-control-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 8px;
      width: 100%;
      margin: 0 0 18px;
    }

    .time-chip {
      appearance: none;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 2px;
      padding: 11px 6px;
      border: 1px solid var(--rule);
      border-radius: 3px;
      background: color-mix(in srgb, var(--paper-2) 70%, transparent);
      color: var(--ink);
      cursor: pointer;
      transition: border-color 0.14s ease, background 0.14s ease, transform 0.1s ease;
    }

    .time-chip:hover {
      border-color: var(--ink-faint);
    }

    .time-chip:active {
      transform: scale(0.97);
    }

    .time-chip .time-chip-label {
      font-family: var(--sans);
      font-size: 10px;
      font-weight: 800;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--ink-faint);
    }

    .time-chip .time-chip-detail {
      font-family: var(--serif);
      font-size: 16px;
      font-weight: 650;
      line-height: 1.1;
    }

    .time-chip.selected {
      border-color: var(--oxblood);
      background: color-mix(in srgb, var(--oxblood) 16%, transparent);
    }

    .time-chip.selected .time-chip-label {
      color: var(--oxblood);
    }

    .start-button {
      width: 100%;
      justify-content: center;
      background: var(--forest);
      border-color: var(--forest);
      color: #11160e;
    }

    .start-button:hover {
      background: color-mix(in srgb, var(--forest) 84%, #fff);
      border-color: color-mix(in srgb, var(--forest) 84%, #fff);
      color: #0d1209;
    }

    .start-wait {
      display: none;
      align-items: center;
      justify-content: center;
      gap: 9px;
      margin: 4px 0 0;
      font-family: var(--sans);
      font-size: 13px;
      color: var(--ink-soft);
    }

    .start-wait-dot {
      width: 9px;
      height: 9px;
      border-radius: 50%;
      background: var(--brass);
      box-shadow: 0 0 0 0 color-mix(in srgb, var(--brass) 70%, transparent);
      animation: waitPulse 1.5s ease-out infinite;
    }

    @keyframes waitPulse {
      0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--brass) 65%, transparent); }
      70% { box-shadow: 0 0 0 7px transparent; }
      100% { box-shadow: 0 0 0 0 transparent; }
    }

    /* Gentle entrance so first load doesn't pop in */
    .start-overlay.show .overlay-box {
      animation: startBoxIn 0.42s cubic-bezier(0.22, 1, 0.36, 1) both;
    }

    @keyframes startBoxIn {
      from { opacity: 0; transform: translateY(10px) scale(0.97); }
      to { opacity: 1; transform: translateY(0) scale(1); }
    }

    .app-shell {
      animation: appShellIn 0.5s ease both;
    }

    @keyframes appShellIn {
      from { opacity: 0; }
      to { opacity: 1; }
    }

    /* Mobile polish layer: keeps the board readable and motion light on phones. */
    :root {
      --motion-fast: 120ms;
      --motion-medium: 220ms;
      --motion-smooth: cubic-bezier(0.22, 1, 0.36, 1);
    }

    .piece-shell {
      transition: transform var(--motion-fast) var(--motion-smooth), filter var(--motion-fast) ease;
      will-change: auto;
    }

    .square.drag-source .piece-shell,
    .square:active .piece-shell {
      will-change: transform;
    }

    .mobile-video-dock {
      overflow: hidden;
      transform-origin: top center;
    }

    .mobile-video-dock.open {
      animation: videoStripIn var(--motion-medium) var(--motion-smooth) both;
    }

    @keyframes videoStripIn {
      from { opacity: 0; transform: translateY(-6px) scale(0.985); }
      to { opacity: 1; transform: translateY(0) scale(1); }
    }

    @media (max-width: 1180px) {
      .app-header {
        position: sticky;
        top: 0;
        z-index: 80;
      }

      .game-area {
        align-items: start;
      }

      .side-panel {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .scoresheet-panel,
      .log-panel {
        grid-column: 1 / -1;
      }

      .blog-panel {
        display: none;
      }
    }

    @media (max-width: 620px) {
      body {
        min-height: 100svh;
      }

      .app-header {
        padding: 7px 9px;
        border-bottom-width: 1px;
        backdrop-filter: none;
      }

      .brand-copy strong {
        max-width: 132px;
        font-size: 25px;
      }

      .icon-button {
        width: 36px;
        height: 36px;
      }

      .app-nav {
        position: fixed;
        top: 54px;
        left: 8px;
        right: 8px;
      }

      .game-area {
        padding: 8px 8px 20px;
        gap: 10px;
        min-height: calc(100svh - 58px);
        align-content: start;
      }

      .top-bar {
        margin-bottom: 4px;
        padding: 7px 0;
      }

      .turn-block {
        gap: 8px;
      }

      .headline {
        font-size: 20px;
        line-height: 1.05;
      }

      .status-text {
        font-size: 12px;
      }

      .toolbar {
        width: 100%;
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        justify-content: flex-start;
        gap: 6px;
      }

      .toolbar .icon-button {
        flex: 0 0 36px;
      }

      .role-badge {
        flex: 1 1 118px;
        margin-left: auto;
        min-height: 30px;
        max-width: 100%;
      }

      .app-footer {
        grid-column: 1 / -1;
        order: 99;
        align-self: end;
        margin-top: auto;
        grid-template-columns: 1fr;
        align-items: start;
        padding: 12px;
      }

      .footer-links {
        width: 100%;
        justify-content: flex-start;
      }

      .footer-link {
        flex: 1 1 120px;
      }

      .player-card {
        min-height: 50px;
        padding: 7px 8px;
      }

      .avatar {
        width: 34px;
        height: 34px;
      }

      .player-name {
        font-size: 14px;
      }

      .player-detail {
        max-width: 160px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
      }

      .clock {
        min-width: 64px;
        padding: 6px 8px;
        font-size: 15px;
      }

      .board-frame {
        border-width: 7px;
        width: min(100%, calc(100vw - 16px));
        max-width: calc(100vw - 16px);
        aspect-ratio: 1 / 1;
        align-self: center;
      }

      .board-frame::after {
        inset: 4px;
      }

      .mobile-video-dock {
        width: 100%;
        margin: 0 0 6px;
        border-radius: 2px;
      }

      .mobile-video-head {
        min-height: 34px;
        padding: 6px 8px;
        font-size: 11px;
      }

      .mobile-video-grid {
        gap: 6px;
        padding: 7px;
      }

      .mobile-video-dock .mobile-video-tile {
        height: 76px;
      }

      .mobile-video-label {
        left: 6px;
        bottom: 5px;
        padding: 2px 5px;
        font-size: 9px;
      }

      .preview-controls {
        top: 6px;
        right: 6px;
        gap: 5px;
      }

      .preview-control {
        width: 30px;
        height: 30px;
        background: rgba(34, 29, 22, 0.42);
      }

      .side-panel {
        grid-template-columns: 1fr;
        gap: 10px;
      }

      .panel {
        padding: 11px;
      }

      .scoresheet-moves,
      .match-log {
        max-height: 168px;
      }

      .overlay {
        padding: 12px;
        align-items: end;
      }

      .start-overlay {
        align-items: center;
        padding: 16px;
      }

      .start-box {
        max-width: none;
        width: min(100%, 380px);
        padding: 12px;
        max-height: min(620px, calc(100dvh - 24px));
        overflow: auto;
      }

      .start-box .overlay-icon {
        display: none;
      }

      .start-kicker {
        margin-bottom: 2px;
        font-size: 8px;
        letter-spacing: 0.18em;
      }

      .start-box .overlay-title {
        font-size: 28px;
        line-height: 1;
      }

      .start-box .overlay-desc {
        margin: 5px 0 8px;
        font-size: 12px;
        line-height: 1.3;
      }

      .start-mode-grid {
        gap: 6px;
        margin: 8px 0;
      }

      .start-mode-card {
        min-height: 46px;
        grid-template-columns: 26px minmax(0, 1fr);
        padding: 8px 10px;
      }

      .start-mode-card i {
        width: 26px;
        height: 26px;
        font-size: 13px;
      }

      .start-mode-card span {
        font-size: 11px;
      }

      .start-mode-card small {
        display: none;
      }

      .time-control-grid {
        gap: 6px;
        margin: 8px 0 10px;
      }

      .time-chip {
        min-height: 48px;
        padding: 7px 4px;
      }

      .time-chip .time-chip-label {
        font-size: 8px;
      }

      .time-chip .time-chip-detail {
        font-size: 16px;
      }

      .start-button {
        min-height: 44px;
        padding: 10px 12px;
      }
    }

    .result-box {
      position: relative;
      overflow: hidden;
      max-width: 390px;
      text-align: center;
    }

    .result-box::before,
    .result-box::after {
      content: "";
      position: absolute;
      pointer-events: none;
      opacity: 0;
    }

    .gameover-actions {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
      width: 100%;
      margin-top: 32px;
    }

    .gameover-overlay.draw .overlay-icon,
    .gameover-overlay.default .overlay-icon {
      background: linear-gradient(150deg, #7d8a93, #59636b);
      color: #f4f6f7;
      box-shadow: 0 12px 30px rgba(89, 99, 107, 0.4), inset 0 2px 6px rgba(255,255,255,0.22);
    }

    .gameover-overlay.draw .overlay-icon::before,
    .gameover-overlay.default .overlay-icon::before {
      background: radial-gradient(circle, rgba(125,138,147,0.26), transparent 72%);
      transform: scale(1.7);
    }

    .gameover-overlay {
      align-items: center;
      justify-content: center;
      padding: 20px;
      background: rgba(34, 29, 22, 0.28);
      backdrop-filter: none;
      pointer-events: none;
    }

    .gameover-overlay.show {
      pointer-events: none;
    }

    .gameover-overlay .result-box {
      pointer-events: auto;
      max-width: min(720px, calc(100vw - 34px));
      width: min(720px, calc(100vw - 34px));
      padding: 52px 52px 44px;
      border: 2px solid var(--rule);
      border-radius: 22px;
      background:
        linear-gradient(180deg, color-mix(in srgb, var(--paper) 97%, white), var(--paper-2));
      color: var(--ink);
      text-align: center;
      box-shadow:
        0 28px 70px rgba(34, 29, 22, 0.30),
        inset 0 0 0 1px rgba(255, 255, 255, 0.32);
    }

    .result-close {
      position: absolute;
      top: 18px;
      right: 18px;
      width: 44px;
      height: 44px;
      border-color: var(--rule);
      background: transparent;
      box-shadow: none;
    }

    .gameover-overlay .overlay-icon {
      width: 120px;
      height: 120px;
      margin: 0 auto 26px;
      border: 0;
      border-radius: 50%;
      display: grid;
      place-items: center;
      background: transparent;
    }

    .gameover-overlay .overlay-icon svg {
      width: 60px;
      height: 60px;
    }

    /* Soft halo ring behind the icon */
    .gameover-overlay .overlay-icon::before {
      content: "";
      position: absolute;
      width: 120px;
      height: 120px;
      border-radius: 50%;
      z-index: -1;
    }

    .gameover-overlay .overlay-icon {
      position: relative;
    }

    .gameover-overlay .overlay-title {
      margin: 0;
      color: var(--ink);
      font-family: var(--serif);
      font-size: clamp(38px, 5vw, 58px);
      font-weight: 650;
      line-height: 1.02;
    }

    .gameover-overlay .overlay-desc {
      max-width: 34rem;
      margin-top: 20px;
      margin-inline: auto;
      color: var(--ink-soft);
      font-size: clamp(16px, 2.2vw, 21px);
      line-height: 1.45;
    }

    .gameover-actions .ghost-button,
    .gameover-actions .primary-button {
      min-height: 58px;
      justify-content: center;
      font-size: 15px;
    }

    .gameover-actions .ghost-button {
      background: color-mix(in srgb, var(--paper) 74%, transparent);
      color: var(--ink-soft);
      border-color: var(--rule);
    }

    .gameover-actions .ghost-button:hover,
    .gameover-actions .ghost-button:focus-visible {
      color: var(--paper);
      border-color: var(--ink);
      background: var(--ink);
    }

    .gameover-overlay.checkmate-win .result-box {
      border-color: color-mix(in srgb, var(--forest) 42%, var(--rule));
      animation: resultRise 420ms var(--motion-smooth) both;
    }

    .gameover-overlay.checkmate-win .result-box::before {
      inset: -30%;
      background:
        radial-gradient(circle at 20% 28%, rgba(210, 163, 74, 0.36) 0 3px, transparent 4px),
        radial-gradient(circle at 75% 24%, rgba(63, 95, 58, 0.28) 0 4px, transparent 5px),
        radial-gradient(circle at 48% 72%, rgba(138, 43, 39, 0.22) 0 3px, transparent 4px);
      animation: confettiDrift 1.15s ease-out both;
    }

    .gameover-overlay.checkmate-win .overlay-icon {
      background: linear-gradient(150deg, #e7b54a, #b9852f);
      color: #fff8e8;
      box-shadow: 0 12px 30px rgba(185, 133, 47, 0.42), inset 0 2px 6px rgba(255,255,255,0.35);
      animation: crownPop 620ms var(--motion-smooth) both;
    }

    .gameover-overlay.checkmate-win .overlay-icon::before {
      background: radial-gradient(circle, color-mix(in srgb, #e7b54a 30%, transparent), transparent 72%);
      transform: scale(1.7);
    }

    .gameover-overlay.checkmate-loss {
      background: rgba(34, 29, 22, 0.34);
    }

    .gameover-overlay.checkmate-loss .result-box {
      background:
        linear-gradient(180deg, color-mix(in srgb, var(--paper) 95%, white), var(--paper-2));
      border-color: color-mix(in srgb, var(--oxblood) 46%, var(--rule));
      color: var(--ink);
      animation: defeatFall 520ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
    }

    .gameover-overlay.checkmate-loss .result-box::after {
      left: 12%;
      right: 12%;
      top: 48%;
      height: 2px;
      background: var(--danger);
      box-shadow: 0 0 18px rgba(207, 99, 89, 0.65);
      animation: defeatSlash 720ms ease-out 120ms both;
    }

    .gameover-overlay.checkmate-loss .overlay-icon {
      background: linear-gradient(150deg, color-mix(in srgb, var(--oxblood) 88%, #000), var(--oxblood));
      color: #fbe9e6;
      box-shadow: 0 12px 30px color-mix(in srgb, var(--oxblood) 40%, transparent), inset 0 2px 6px rgba(255,255,255,0.18);
      animation: defeatPulse 850ms ease-out both;
    }

    .gameover-overlay.checkmate-loss .overlay-icon::before {
      background: radial-gradient(circle, color-mix(in srgb, var(--oxblood) 26%, transparent), transparent 72%);
      transform: scale(1.7);
    }

    .gameover-overlay.checkmate-loss .overlay-title,
    .gameover-overlay.checkmate-loss .overlay-desc {
      color: var(--ink);
    }

    @keyframes resultRise {
      from { opacity: 0; transform: translateY(14px) scale(0.96); }
      to { opacity: 1; transform: translateY(0) scale(1); }
    }

    @keyframes confettiDrift {
      0% { opacity: 0; transform: translateY(-16px) rotate(0deg); }
      18% { opacity: 1; }
      100% { opacity: 0; transform: translateY(34px) rotate(16deg); }
    }

    @keyframes crownPop {
      0% { transform: scale(0.72) rotate(-6deg); }
      62% { transform: scale(1.12) rotate(3deg); }
      100% { transform: scale(1) rotate(0); }
    }

    @keyframes defeatFall {
      0% { opacity: 0; transform: translateY(-10px) scale(1.04); filter: blur(1px); }
      55% { opacity: 1; transform: translateY(4px) scale(0.985); filter: blur(0); }
      100% { opacity: 1; transform: translateY(0) scale(1); }
    }

    @keyframes defeatSlash {
      0% { opacity: 0; transform: scaleX(0) rotate(-7deg); }
      35% { opacity: 1; }
      100% { opacity: 0; transform: scaleX(1) rotate(-7deg); }
    }

    @keyframes defeatPulse {
      0%, 100% { transform: scale(1); }
      45% { transform: scale(0.92); }
    }

    /* ===== Win celebration confetti ===== */
    .confetti-layer {
      position: absolute;
      inset: 0;
      overflow: hidden;
      pointer-events: none;
      z-index: 1;
    }

    .confetti-piece {
      position: absolute;
      top: -14px;
      width: 8px;
      height: 13px;
      border-radius: 2px;
      opacity: 0;
      animation: confettiFall var(--confetti-duration, 2.4s) ease-in var(--confetti-delay, 0s) both;
    }

    @keyframes confettiFall {
      0% { opacity: 0; transform: translateY(-20px) rotate(0deg); }
      8% { opacity: 1; }
      80% { opacity: 1; }
      100% { opacity: 0; transform: translateY(110vh) rotate(var(--confetti-spin, 540deg)); }
    }

    @keyframes trophyBounce {
      0% { transform: scale(0.4) rotate(-12deg); }
      45% { transform: scale(1.25) rotate(6deg); }
      70% { transform: scale(0.94) rotate(-2deg); }
      100% { transform: scale(1) rotate(0); }
    }

    .gameover-overlay.checkmate-win .overlay-icon i {
      animation: trophyBounce 760ms var(--motion-smooth) both;
    }

    /* ===== On-board analysis bar ===== */
    .board-review-bar {
      width: var(--board-width);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
      margin-top: 10px;
      padding: 8px 10px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--surface-2);
    }

    .board-review-bar[hidden] {
      display: none;
    }

    .board-review-tag {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--oxblood, #a93c38);
      white-space: nowrap;
    }

    .board-review-controls {
      display: flex;
      align-items: center;
      gap: 6px;
      flex: 1;
      justify-content: center;
      min-width: 0;
    }

    .board-review-label {
      min-width: 86px;
      text-align: center;
      font-size: 13px;
      font-variant-numeric: tabular-nums;
      color: var(--muted);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .board-review-exit {
      flex-shrink: 0;
    }

    @media (max-width: 620px) {
      .board-review-tag span,
      .board-review-tag {
        font-size: 11px;
      }

      .board-review-bar {
        gap: 6px;
        padding: 7px 8px;
      }

      .board-review-label {
        min-width: 64px;
        font-size: 12px;
      }
    }

    /* ===== Board stage with eval bar ===== */
    :root {
      --board-width: min(100%, 590px);
    }

    /* ===== Board-first layout: the board is the hero on every screen ===== */
    @media (min-width: 1181px) {
      :root {
        --board-width: min(100%, clamp(640px, calc(100dvh - 80px), 820px));
      }

      .board-column {
        min-height: 0;
        justify-content: flex-start;
        padding-top: 0;
      }

      .records-rail .scoresheet-moves {
        max-height: clamp(220px, 42vh, 520px);
      }

      .app-header {
        padding: 8px 22px !important;
        gap: 0 !important;
      }

      .edition-strip {
        display: none !important;
      }

      .brand-copy span {
        display: none;
      }

      .game-area {
        padding: 10px 18px 12px !important;
        gap: 16px !important;
      }

      .player-card {
        padding: 6px 12px !important;
      }

      .player-card .avatar {
        width: 42px;
        height: 42px;
      }

      .player-card .clock {
        padding: 6px 10px;
        font-size: 17px;
      }
    }

    /* Collapsible video pane (board gets the space by default) */
    .app-shell.video-hidden {
      grid-template-columns: minmax(0, 1fr) 0;
    }

    .app-shell.video-hidden .video-pane {
      display: none;
    }

    #btn-video-toggle[aria-pressed="true"],
    #btn-video-panel-toggle[aria-pressed="true"] {
      color: var(--oxblood, #a93c38);
      border-color: color-mix(in srgb, var(--oxblood, #a93c38) 55%, var(--line));
      background: color-mix(in srgb, var(--oxblood, #a93c38) 12%, transparent);
    }

    /* ===== Mobile: edge-to-edge board, chess.com style ===== */
    @media (max-width: 860px) {
      .board-stage {
        width: calc(100% + 20px);
        margin-left: -10px;
        margin-right: -10px;
        gap: 4px;
      }

      .board-frame {
        border-width: 0 !important;
        border-radius: 0 !important;
        box-shadow: none !important;
      }

      .board-frame::after {
        display: none !important;
      }

      .player-card {
        width: calc(100% + 20px) !important;
        margin-left: -10px;
        margin-right: -10px;
        border-radius: 0 !important;
        border-left: 0 !important;
        border-right: 0 !important;
      }

      .board-review-bar,
      .engine-panel {
        width: 100%;
      }

      .top-bar .eyebrow {
        display: none;
      }

      .top-bar {
        margin-bottom: 4px;
      }
    }

    /* ===== Match start "VS" intro (chess.com style) ===== */
    .matchup-overlay {
      position: absolute;
      inset: 0;
      z-index: 9;
      display: none;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 24px;
      pointer-events: none;
      background: rgba(12, 10, 8, 0.22);
    }

    .matchup-overlay.show {
      display: flex;
    }

    .matchup-overlay.hiding {
      animation: matchupFade 380ms ease forwards;
    }

    @keyframes matchupFade {
      to { opacity: 0; }
    }

    .matchup-card {
      display: flex;
      align-items: center;
      width: min(78%, 380px);
      border-radius: 8px;
      overflow: hidden;
      box-shadow: 0 16px 36px rgba(0, 0, 0, 0.38);
    }

    .matchup-card.top {
      background: #23272d;
      color: #f4f4f4;
      animation: matchupSlideTop 460ms var(--motion-smooth) both;
    }

    .matchup-card.bottom {
      background: #f6f3ec;
      color: #211c16;
      animation: matchupSlideBottom 460ms var(--motion-smooth) 120ms both;
    }

    @keyframes matchupSlideTop {
      from { transform: translateY(-46px); opacity: 0; }
      to { transform: translateY(0); opacity: 1; }
    }

    @keyframes matchupSlideBottom {
      from { transform: translateY(46px); opacity: 0; }
      to { transform: translateY(0); opacity: 1; }
    }

    .matchup-avatar {
      width: 62px;
      height: 62px;
      flex-shrink: 0;
      display: grid;
      place-items: center;
      font-size: 26px;
      background: var(--oxblood, #a93c38);
      color: #fff;
    }

    .matchup-avatar img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .matchup-name {
      padding: 0 16px;
      font-weight: 800;
      font-size: 17px;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .matchup-vs {
      background: #2c2c2c;
      color: #ffffff;
      font-weight: 900;
      font-size: 21px;
      letter-spacing: 0.05em;
      padding: 9px 18px;
      border-radius: 8px;
      box-shadow: 0 12px 26px rgba(0, 0, 0, 0.4);
      animation: matchupVsPop 420ms var(--motion-smooth) 240ms both;
    }

    @keyframes matchupVsPop {
      from { transform: scale(0.3); opacity: 0; }
      60% { transform: scale(1.18); }
      to { transform: scale(1); opacity: 1; }
    }

    .board-stage {
      display: flex;
      align-items: stretch;
      gap: 8px;
      width: var(--board-width);
    }

    .board-stage .board-frame {
      flex: 1;
      min-width: 0;
    }

    .eval-bar {
      display: flex;
      flex-direction: column;
      gap: 6px;
      width: 20px;
      flex-shrink: 0;
    }

    .eval-bar[hidden] {
      display: none;
    }

    .eval-bar-track {
      position: relative;
      flex: 1;
      border-radius: 999px;
      overflow: hidden;
      background: #221d16;
      border: 1px solid var(--line);
    }

    .eval-bar-fill {
      position: absolute;
      left: 0;
      right: 0;
      bottom: 0;
      height: 50%;
      background: linear-gradient(to top, #f2ecdd 0%, #f2ecdd 88%, #e8e0cc 100%);
      /* Smoother, calmer eval transition — gentle ease, longer settle */
      transition: height 650ms cubic-bezier(0.22, 1, 0.36, 1);
      will-change: height;
    }

    .eval-bar-mid {
      position: absolute;
      left: 0;
      right: 0;
      top: 50%;
      height: 2px;
      background: var(--oxblood, #a93c38);
      opacity: 0.85;
      transform: translateY(-50%);
    }

    .eval-bar-score {
      font-size: 10px;
      font-weight: 800;
      text-align: center;
      line-height: 1.1;
      color: var(--muted);
      font-variant-numeric: tabular-nums;
      word-break: break-all;
    }

    /* ===== User annotations (right-click arrows + square highlights) ===== */
    #board-user-layer .user-arrow {
      opacity: 0.78;
      stroke-linecap: round;
      stroke-linejoin: round;
    }

    #board-user-layer .user-hl {
      opacity: 0.42;
    }

    #board-user-layer .user-arrow-preview {
      opacity: 0.55;
    }

    /* ===== Best-move arrows ===== */
    .board-arrows {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      pointer-events: none;
      z-index: 4;
      color: var(--oxblood, #a93c38);
    }

    .board-arrows .best-arrow {
      stroke: currentColor;
      stroke-width: 16;
      stroke-linecap: round;
      opacity: 0.82;
      filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.35));
    }

    /* ===== Engine panel ===== */
    .engine-panel {
      width: var(--board-width);
      margin-top: 8px;
      padding: 10px 12px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--surface-2);
    }

    .engine-panel[hidden] {
      display: none;
    }

    .engine-head {
      display: flex;
      align-items: baseline;
      gap: 10px;
      flex-wrap: wrap;
    }

    .engine-tag {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--muted);
    }

    .engine-eval {
      font-size: 18px;
      font-weight: 800;
      font-variant-numeric: tabular-nums;
      color: var(--text);
    }

    .engine-depth {
      font-size: 12px;
      color: var(--subtle);
      font-variant-numeric: tabular-nums;
    }

    .engine-status {
      font-size: 12px;
      color: var(--oxblood, #a93c38);
      margin-left: auto;
    }

    .engine-hint-toggle {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      min-height: 30px;
      padding: 0 10px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: transparent;
      color: var(--muted);
      font-size: 11px;
      font-weight: 900;
      letter-spacing: 0.04em;
      text-transform: uppercase;
    }

    .engine-hint-toggle[aria-pressed="true"] {
      background: color-mix(in srgb, var(--accent) 16%, var(--surface-2));
      border-color: color-mix(in srgb, var(--accent) 70%, white);
      color: var(--text);
    }

    .engine-line {
      margin: 8px 0 0;
      font-size: 13px;
      line-height: 1.5;
      color: var(--muted);
      word-break: break-word;
    }

    .engine-line strong {
      color: var(--text);
    }

    .board-review-engine[aria-pressed="true"] {
      color: var(--oxblood, #a93c38);
      border-color: color-mix(in srgb, var(--oxblood, #a93c38) 55%, var(--line));
      background: color-mix(in srgb, var(--oxblood, #a93c38) 14%, transparent);
    }

    .engine-tag {
      color: var(--oxblood, #a93c38);
    }

    .engine-mode-button i {
      color: var(--oxblood, #a93c38);
    }

    /* ===== Game review (chess.com-style) ===== */
    .review-progress {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-top: 10px;
    }

    .review-progress[hidden] {
      display: none;
    }

    .review-progress-track {
      flex: 1;
      height: 8px;
      border-radius: 999px;
      overflow: hidden;
      background: color-mix(in srgb, var(--line) 55%, transparent);
      border: 1px solid var(--line);
    }

    .review-progress-fill {
      height: 100%;
      width: 0%;
      background: var(--oxblood, #a93c38);
      border-radius: 999px;
      transition: width 260ms var(--motion-smooth);
    }

    .review-progress-text {
      font-size: 12px;
      color: var(--muted);
      font-variant-numeric: tabular-nums;
      white-space: nowrap;
    }

    .review-summary {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 8px;
      margin-top: 10px;
    }

    .review-summary[hidden] {
      display: none;
    }

    .review-side {
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: 8px 10px;
      background: color-mix(in srgb, var(--surface-3) 60%, transparent);
    }

    .review-side h3 {
      margin: 0 0 2px;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 0.05em;
      text-transform: uppercase;
      color: var(--muted);
    }

    .review-accuracy {
      font-size: 22px;
      font-weight: 800;
      font-variant-numeric: tabular-nums;
      color: var(--text);
      line-height: 1.1;
    }

    .review-source {
      margin-top: 3px;
      color: var(--subtle);
      font-size: 10px;
      font-weight: 900;
      letter-spacing: 0.06em;
      text-transform: uppercase;
    }

    .review-counts {
      margin-top: 6px;
      display: flex;
      flex-wrap: wrap;
      gap: 4px 8px;
      font-size: 11px;
      font-variant-numeric: tabular-nums;
    }

    .review-counts span {
      font-weight: 700;
    }

    .cls-brilliant { color: #26c2a3; }
    .cls-great { color: #5b8baf; }
    .cls-best { color: #95bb4b; }
    .cls-excellent { color: #81b64c; }
    .cls-good { color: #95a75c; }
    .cls-book { color: #a88865; }
    .cls-inaccuracy { color: #d9a43a; }
    .cls-mistake { color: #e58f2a; }
    .cls-blunder { color: #ca3431; }

    .scoresheet-ply .ply-glyph {
      margin-left: 4px;
      font-size: 11px;
      font-weight: 800;
    }

    .board-badge-circle {
      stroke: rgba(0, 0, 0, 0.12);
      stroke-width: 1;
    }

    .board-badge-text {
      font-family: var(--sans, sans-serif);
      font-weight: 800;
      fill: #ffffff;
      text-anchor: middle;
      dominant-baseline: central;
    }

    .board-badge {
      animation: badgePop 280ms var(--motion-smooth) both;
      filter: drop-shadow(0 3px 5px rgba(0, 0, 0, 0.35));
    }

    @keyframes badgePop {
      0% { transform: scale(0.2); opacity: 0; }
      60% { transform: scale(1.18); opacity: 1; }
      100% { transform: scale(1); opacity: 1; }
    }

    /* ===== Chess focus mode (full-scale, distraction-free board) ===== */
    body.chess-focus-mode {
      overflow: hidden;
      background: var(--paper);
    }

    /* Hide everything except the board and its clocks/controls */
    body.chess-focus-mode .app-header,
    body.chess-focus-mode .side-panel,
    body.chess-focus-mode .records-rail,
    body.chess-focus-mode .video-pane,
    body.chess-focus-mode .engine-panel,
    body.chess-focus-mode .review-summary,
    body.chess-focus-mode .review-progress,
    body.chess-focus-mode .blog-panel,
    body.chess-focus-mode .app-footer {
      display: none !important;
    }

    body.chess-focus-mode .app-shell,
    body.chess-focus-mode .app-shell.video-hidden {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 100vw;
      height: 100dvh;
      min-height: 100dvh;
      padding: 0;
      overflow: hidden;
    }

    body.chess-focus-mode .game-area {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 100vw;
      height: 100dvh;
      padding: max(10px, env(safe-area-inset-top)) max(10px, env(safe-area-inset-right)) max(10px, env(safe-area-inset-bottom)) max(10px, env(safe-area-inset-left));
      overflow: hidden;
    }

    body.chess-focus-mode .board-column {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      width: auto;
      max-width: 96vw;
      height: 100%;
      min-height: 0;
      gap: 8px;
      margin: 0 auto;
    }

    /* Board sizes to fit the viewport, reserving room for two clock rows + toolbar */
    body.chess-focus-mode .board-stage {
      width: min(94vw, calc(100dvh - 190px));
      max-width: min(94vw, calc(100dvh - 190px));
      margin: 0 auto;
      gap: 0;
    }

    body.chess-focus-mode .board-frame {
      width: 100% !important;
      max-width: none !important;
      border-width: 4px !important;
      border-radius: 6px !important;
      box-shadow: 0 16px 40px rgba(34, 29, 22, 0.30) !important;
    }

    body.chess-focus-mode .board-frame::after {
      display: none !important;
    }

    /* Clock rows + toolbar share the board's width so everything lines up */
    body.chess-focus-mode .top-bar,
    body.chess-focus-mode .player-card,
    body.chess-focus-mode .board-review-bar {
      width: min(94vw, calc(100dvh - 190px));
      max-width: min(94vw, calc(100dvh - 190px));
      margin-left: auto;
      margin-right: auto;
      box-shadow: none;
    }

    body.chess-focus-mode .top-bar {
      padding: 2px 0;
      margin-bottom: 0;
      border: 0;
      background: transparent;
    }

    body.chess-focus-mode .top-bar .turn-block {
      display: none;
    }

    body.chess-focus-mode .player-card-actions {
      gap: 4px;
    }

    body.chess-focus-mode .player-card-actions .icon-button {
      width: 30px;
      height: 30px;
      min-width: 30px;
    }

    body.chess-focus-mode .player-card {
      min-height: 46px;
      padding: 7px 12px;
    }

    body.chess-focus-mode .player-detail {
      display: none;
    }

    body.chess-focus-mode .avatar {
      width: 34px;
      height: 34px;
    }

    body.chess-focus-mode .clock {
      min-width: 78px;
      padding: 6px 10px;
      font-size: 17px;
    }

    /* The expand button becomes the highlighted "exit" control */
    body.chess-focus-mode #btn-chess-focus {
      border-color: var(--oxblood);
      background: var(--oxblood);
      color: #f8ead0;
    }

    @media (max-width: 620px) {
      body.chess-focus-mode .game-area {
        padding: max(6px, env(safe-area-inset-top)) 0 max(6px, env(safe-area-inset-bottom));
      }

      body.chess-focus-mode .board-column {
        width: 100%;
        max-width: 100vw;
        gap: 6px;
      }

      body.chess-focus-mode .board-stage,
      body.chess-focus-mode .top-bar,
      body.chess-focus-mode .board-review-bar {
        width: min(100vw, calc(100dvh - 165px));
        max-width: min(100vw, calc(100dvh - 165px));
      }

      body.chess-focus-mode .player-card {
        width: min(96vw, calc(100dvh - 165px));
        max-width: min(96vw, calc(100dvh - 165px));
      }

      body.chess-focus-mode .board-frame {
        border-width: 0 !important;
        border-radius: 0 !important;
      }

      body.chess-focus-mode .toolbar {
        flex-wrap: nowrap;
        overflow-x: auto;
        justify-content: center;
        padding: 0 6px;
      }

      body.chess-focus-mode .toolbar .icon-button {
        flex: 0 0 auto;
      }
    }



    @media (max-width: 620px) {
      .result-box {
        max-width: none;
        width: 100%;
      }

      .gameover-actions {
        grid-template-columns: 1fr;
        gap: 10px;
        margin-top: 20px;
      }

      .gameover-overlay {
        padding: 10px;
      }

      .gameover-overlay .result-box {
        padding: 28px 18px 18px;
      }

      .gameover-overlay .overlay-icon {
        display: grid;
        width: 64px;
        height: 64px;
        margin-bottom: 14px;
        font-size: 28px;
      }

      .result-close {
        top: 10px;
        right: 10px;
        width: 36px;
        height: 36px;
      }

      .gameover-overlay .overlay-title {
        font-size: 34px;
      }

      .gameover-overlay .overlay-desc {
        margin-top: 12px;
        font-size: 15px;
      }

      .gameover-actions .ghost-button,
      .gameover-actions .primary-button {
        min-height: 48px;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      *,
      *::before,
      *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 0.001ms !important;
      }
    }

    /* Performance: backdrop blur is GPU-costly and causes scroll jank on phones.
       Drop it on small screens and keep a solid translucent background instead. */
    @media (max-width: 820px) {
      .app-header,
      .panel,
      .video-pane,
      .info-sheet,
      .profile-modal-card,
      .sheet-backdrop,
      .mobile-video-dock,
      .toast-notification {
        backdrop-filter: none !important;
        -webkit-backdrop-filter: none !important;
      }
    }

/* ===================================================================
   MOBILE UI FIXES — from live screenshot audit (June 2026)
   =================================================================== */

/* --- Fix 1: Player name overlapping toolbar buttons on mobile ---
   The top player-card uses a three-column grid (name | buttons | clock).
   On narrow screens the name column has no hard min-width:0 constraint,
   so a long name (e.g. "Mansour Duffani") overflows into the buttons.
   Fix: clamp the meta column and give the name a max-width so it
   truncates cleanly instead of colliding with the icons. */
@media (max-width: 860px) {
  .player-card.top {
    grid-template-columns: minmax(0, 1fr) auto auto;
  }

  .player-meta {
    min-width: 0;
    overflow: hidden;
  }

  .player-meta > div {
    min-width: 0;
    overflow: hidden;
  }

  .player-name {
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}

/* --- Fix 2: Reduce toolbar icon count on mobile ---
   8+ icon buttons in one row is too wide for a 390px screen.
   Hide the least-essential icons (theme, drag-toggle, focus-expand)
   on phones. They remain accessible via the hamburger menu or settings. */
@media (max-width: 620px) {
  #btn-theme,
  #btn-drag,
  #btn-chess-focus {
    display: none !important;
  }

  .player-card-actions {
    gap: 1px;
  }

  .player-card-actions .icon-button {
    width: 28px;
    min-width: 28px;
    height: 28px;
  }
}

/* --- Fix 3: "ANALYSIS" label cut off in review bar ---
   .board-review-tag had no flex-shrink:0 so it compressed on narrow
   screens and the text clipped inside the flex container.
   The controls (arrows + label) need to give way, not the tag. */
.board-review-tag {
  flex-shrink: 0;
}

.board-review-controls {
  min-width: 0;
  overflow: hidden;
}

@media (max-width: 480px) {
  /* On very small screens, shorten "ANALYSIS" to an icon only */
  .board-review-tag span.review-tag-text {
    display: none;
  }

  .board-review-bar {
    gap: 4px;
    padding: 6px 8px;
  }
}

/* --- Fix 4: Role badge wrapping on mobile ---
   The GUEST BLACK badge has no max-width and can push the clock off-screen.
   Cap it so it ellipsis-truncates before breaking layout. */
.role-badge {
  max-width: 80px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

@media (max-width: 480px) {
  .role-badge {
    max-width: 64px;
    font-size: 9px;
    padding: 2px 5px;
  }
}

/* ===================================================================
   SYNC PATCH — patches confirmed in JS/HTML but missing from this CSS
   upload. Re-appended to restore full parity.
   =================================================================== */

/* 1. Promotion overlay — escape board-frame overflow:hidden on mobile.
   position:fixed pins it to the viewport so it never gets clipped on
   375px screens. z-index 1100 sits above the drag ghost (z:1000). */
#promotion-overlay.show {
  position: fixed;
  inset: 0;
  z-index: 1100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(9, 12, 18, 0.86);
  backdrop-filter: blur(12px);
}

/* 2. Brand text restoration — "Chessmate" truncated to "Chessm…"
   on narrow phones. Drops font-size to guarantee the full 9-char
   word fits down to iPhone SE (320px). */
@media (max-width: 620px) {
  .brand-copy strong {
    font-size: 14px;
    letter-spacing: -0.01em;
    max-width: 140px;
  }
}
@media (max-width: 390px) {
  .brand-copy strong {
    font-size: 13.5px;
    max-width: 116px;
  }
  .brand-mark {
    width: 32px;
    height: 32px;
  }
  .masthead-row {
    gap: 6px;
  }
}

/* 3. Board depth uplift — three-layer shadow matching the poster mockup.
   Warm oxblood rim bloom + deep drop weight + inner hairline edge. */
.board-frame {
  box-shadow:
    inset 0 0 0 1px rgba(242, 236, 221, 0.06),
    0 0 90px rgba(192, 71, 63, 0.22),
    0 24px 60px rgba(0, 0, 0, 0.6) !important;
}
:root[data-appearance="light"] .board-frame {
  box-shadow:
    inset 0 0 0 1px rgba(58, 42, 27, 0.10),
    0 0 70px rgba(138, 43, 39, 0.18),
    0 18px 44px rgba(58, 42, 27, 0.32) !important;
}
:root[data-appearance="newspaper"] .board-frame {
  box-shadow:
    inset 0 0 0 1px rgba(58, 42, 27, 0.10),
    0 0 80px rgba(138, 43, 39, 0.20),
    0 22px 50px rgba(58, 42, 27, 0.38) !important;
}
body.chess-focus-mode .board-frame {
  box-shadow:
    inset 0 0 0 1px rgba(242, 236, 221, 0.06),
    0 0 60px rgba(192, 71, 63, 0.18) !important;
}

/* 4. Letter avatar — first letter of player name on an oxblood disc,
   replacing the generic fa-user icon for guests and bots. */
.avatar.avatar-letter {
  background: linear-gradient(135deg, #8a2b27, #c0473f) !important;
  color: #f2ecdd;
  border-color: rgba(242, 236, 221, 0.22);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
}
.avatar.avatar-letter .avatar-letter-glyph {
  font-family: 'Fraunces', Georgia, serif;
  font-size: 22px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.35);
  user-select: none;
}
.player-card .avatar.avatar-letter .avatar-letter-glyph {
  font-size: 26px;
}

/* 5. Opening name display — italic Fraunces line beneath the scoresheet
   header, revealed once a known opening is matched. Hidden by default. */
.opening-name {
  margin: 0 0 10px;
  padding: 0;
  font-family: 'Fraunces', Georgia, serif;
  font-size: 13px;
  font-weight: 500;
  font-style: italic;
  line-height: 1.4;
  color: var(--accent-strong, #c0473f);
  letter-spacing: -0.005em;
  transition: opacity 240ms ease;
}
.opening-name[hidden] {
  display: none;
}
:root[data-appearance="ink"] .opening-name,
:root[data-appearance="ink-v3"] .opening-name {
  color: color-mix(in srgb, var(--accent-strong) 80%, #f2ecdd);
}

/* ===================================================================
   MOBILE BOARD-FIRST ARCHITECTURE — "the board is the hero"
   
   Body classes synced by JS (updateBodyStateClasses):
     .cm-idle      — setup phase, start overlay visible
     .cm-playing   — active game, board is the ONLY priority
     .cm-gameover  — game ended, compact result shown
     .cm-reviewing — post-game analysis
     .cm-online    — multiplayer mode
   
   Philosophy: on mobile, during play, hide EVERYTHING except board +
   player cards. Panels below the board are noise during a game. They
   reappear when idle, reviewing, or scrolling in setup mode.
   =================================================================== */

/* ── Captured pieces base styling ── */
.captured-pieces {
  display: flex;
  align-items: center;
  gap: 1px;
  min-width: 0;
  overflow: hidden;
  height: 20px;
  flex-shrink: 1;
}
.captured-pieces img,
.captured-pieces svg {
  width: 16px;
  height: 16px;
  opacity: 0.75;
}

@media (max-width: 620px) {

  /* ════════════════════════════════════════════════════════════════
     ALWAYS (any state on mobile)
     ════════════════════════════════════════════════════════════════ */

  /* Player cards — single compact row always */
  .player-card {
    display: flex !important;
    align-items: center;
    gap: 6px;
    min-height: auto !important;
    padding: 4px 8px !important;
    grid-template-columns: none !important;
  }
  .player-card .player-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    min-width: 0;
    flex: 1;
  }
  .player-card .avatar {
    width: 28px !important;
    height: 28px !important;
    min-width: 28px !important;
    font-size: 12px !important;
  }
  .player-card .avatar.avatar-letter .avatar-letter-glyph {
    font-size: 15px !important;
  }
  .player-card .player-name {
    font-size: 13px !important;
    max-width: 80px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .player-card .player-detail {
    display: none !important;
  }
  .player-card .clock {
    font-size: 14px !important;
    min-width: 50px !important;
    padding: 3px 7px !important;
    margin-left: auto;
    flex-shrink: 0;
  }

  /* Captured pieces — tiny, inline */
  .captured-pieces {
    height: 14px;
    gap: 0;
  }
  .captured-pieces img,
  .captured-pieces svg {
    width: 13px !important;
    height: 13px !important;
  }

  /* Toolbar — only flip, draw, resign visible */
  .player-card-actions {
    gap: 2px !important;
    flex-shrink: 0;
  }
  #btn-theme, #btn-sound, #btn-drag, #btn-chess-focus,
  #btn-engine-hints-top, #btn-video-toggle, .role-badge {
    display: none !important;
  }
  .player-card-actions .icon-button {
    width: 28px !important;
    height: 28px !important;
    min-width: 28px !important;
    min-height: 28px !important;
    font-size: 11px !important;
  }

  /* Board — maximum space */
  .board-column { gap: 2px !important; }
  .game-area {
    padding: 2px 2px max(6px, env(safe-area-inset-bottom)) !important;
  }
  .board-frame {
    width: min(100%, calc(100vw - 4px)) !important;
    max-width: calc(100vw - 4px) !important;
  }
  .top-bar { padding: 2px 0 !important; }

  /* Board review bar — compact */
  .board-review-bar {
    padding: 4px 6px !important;
    gap: 3px !important;
  }
  .board-review-bar .icon-button {
    width: 30px !important; height: 30px !important;
    min-width: 30px !important; min-height: 30px !important;
  }

  /* Game-over overlay — compact, see-through */
  .gameover-overlay {
    padding: 10px !important;
    background: rgba(0, 0, 0, 0.45) !important;
    backdrop-filter: blur(4px) !important;
  }
  .gameover-overlay .result-box {
    max-width: min(320px, calc(100vw - 20px)) !important;
    width: min(320px, calc(100vw - 20px)) !important;
    padding: 20px 18px 18px !important;
    border-radius: 14px !important;
  }
  .gameover-overlay .overlay-icon {
    width: 48px !important; height: 48px !important;
    margin: 0 auto 10px !important;
  }
  .gameover-overlay .overlay-icon svg {
    width: 26px !important; height: 26px !important;
  }
  .gameover-overlay .overlay-icon::before {
    width: 48px !important; height: 48px !important;
  }
  .gameover-overlay .overlay-title {
    font-size: 20px !important;
    line-height: 1.1 !important;
  }
  .gameover-overlay .overlay-desc {
    font-size: 12px !important;
    margin-top: 6px !important;
    line-height: 1.35 !important;
  }
  .gameover-actions {
    grid-template-columns: 1fr 1fr !important;
    gap: 6px !important;
    margin-top: 12px !important;
  }
  .gameover-actions .ghost-button,
  .gameover-actions .primary-button {
    min-height: 38px !important;
    font-size: 11px !important;
    padding: 6px 8px !important;
    border-radius: 9px !important;
  }
  .gameover-actions .primary-button:last-child {
    grid-column: 1 / -1;
  }
  .result-close {
    top: 6px !important; right: 6px !important;
    width: 30px !important; height: 30px !important;
    min-width: 30px !important; min-height: 30px !important;
  }

  /* Start overlay — tighter */
  .start-overlay .overlay-box {
    max-width: min(340px, calc(100vw - 16px)) !important;
    padding: 18px 14px !important;
  }

  /* Scoresheet — compact */
  .scoresheet-panel {
    padding: 8px 10px !important;
  }
  .scoresheet-panel .panel-header { margin-bottom: 3px !important; }

  /* Engine panel — compact */
  .engine-panel {
    padding: 8px 10px !important;
  }

  /* ════════════════════════════════════════════════════════════════
     DURING ACTIVE PLAY (cm-playing) — board ONLY
     Hide everything below the board except scoresheet (collapsed).
     ════════════════════════════════════════════════════════════════ */
  .cm-playing .blog-panel,
  .cm-playing .device-panel,
  .cm-playing .info-sheet,
  .cm-playing .match-log,
  .cm-playing .records-rail > *:not(.scoresheet-panel):not(.engine-panel),
  .cm-playing .side-panel > *:not(.scoresheet-panel):not(.engine-panel),
  .cm-playing .app-footer {
    display: none !important;
  }

  /* During play, hide the multiplayer panel unless online */
  .cm-playing:not(.cm-online) .device-panel,
  .cm-playing:not(.cm-online) .video-pane {
    display: none !important;
  }

  /* ════════════════════════════════════════════════════════════════
     DURING REVIEW (cm-reviewing) — board + engine + scoresheet
     ════════════════════════════════════════════════════════════════ */
  .cm-reviewing .blog-panel,
  .cm-reviewing .device-panel,
  .cm-reviewing .info-sheet,
  .cm-reviewing .match-log,
  .cm-reviewing .app-footer {
    display: none !important;
  }

  /* ════════════════════════════════════════════════════════════════
     IDLE (cm-idle) — show panels for exploration, but blog hidden
     (accessible via Blog nav button)
     ════════════════════════════════════════════════════════════════ */
  .cm-idle .blog-panel {
    display: none !important;
  }

  /* ════════════════════════════════════════════════════════════════
     GAME OVER (cm-gameover) — same as playing + compact overlay
     ════════════════════════════════════════════════════════════════ */
  .cm-gameover .blog-panel,
  .cm-gameover .device-panel,
  .cm-gameover .info-sheet,
  .cm-gameover .match-log,
  .cm-gameover .app-footer {
    display: none !important;
  }
}

/* Final mobile board pass: make the board feel closer to chess.com scale
   while keeping it inside the viewport and impossible to text-select. */
.board-frame,
.chessboard,
.square,
.piece-shell,
.piece-img,
.piece-fallback,
.coord {
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

.chessboard,
.square,
.piece-img {
  -webkit-user-drag: none;
}

@media (max-width: 620px) {
  .game-area {
    padding-left: 0 !important;
    padding-right: 0 !important;
  }

  .board-column {
    width: 100% !important;
    max-width: 100% !important;
    padding-left: 0 !important;
    padding-right: 0 !important;
    align-items: stretch !important;
  }

  .board-stage {
    width: 100% !important;
    max-width: 100% !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
    transform: none !important;
  }

  .board-frame {
    width: min(100%, 100dvw) !important;
    max-width: min(100%, 100dvw) !important;
    border-width: 0 !important;
  }

  .chessboard {
    width: 100% !important;
    height: 100% !important;
  }
}

/* ── Extra tight for very small phones ── */
@media (max-width: 380px) {
  .player-card .avatar {
    width: 24px !important; height: 24px !important; min-width: 24px !important;
  }
  .player-card .player-name {
    font-size: 12px !important; max-width: 64px;
  }
  .player-card .clock {
    font-size: 12px !important; min-width: 44px !important; padding: 2px 5px !important;
  }
  .gameover-overlay .overlay-title { font-size: 18px !important; }
  .gameover-actions .ghost-button,
  .gameover-actions .primary-button {
    font-size: 10px !important; min-height: 34px !important;
  }
}

/* ===================================================================
   CHESS.COM-STYLE MOBILE — board is the hero, strip all chrome
   
   Reference: Chess.com mobile app
   • Board nearly full-width, NO frame, NO border, NO decorative shadow
   • Player rows minimal: avatar + name + rating, clean clock chip
   • Generous dark breathing room
   • Flat, calm, focused
   =================================================================== */

/* Guard: full-bleed board uses 100vw + translateX; never allow sideways scroll */
html, body {
  overflow-x: hidden;
  max-width: 100%;
}

@media (max-width: 620px) {

  /* ════════════════════════════════════════════════════════════
     BOARD: full-width, frameless, flat (the Chess.com look)
     ════════════════════════════════════════════════════════════ */
  .board-frame {
    width: 100% !important;
    max-width: 100% !important;
    border: 0 !important;
    border-radius: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
  }

  /* Remove the decorative double-border inlay */
  .board-frame::after {
    display: none !important;
  }

  /* Keep a hairline only so squares don't bleed at edges */
  .chessboard {
    border: 0 !important;
    border-radius: 0 !important;
  }

  /* Board column stays normal width; only the board-stage breaks out
     full-bleed. This keeps player cards + clocks correctly padded. */
  .board-column {
    width: 100% !important;
    max-width: 100% !important;
    margin: 0 !important;
    transform: none !important;
    gap: 0 !important;
    align-items: stretch !important;
  }

  /* Keep the board inside the mobile layout width so browser UI scrollbars
     cannot nudge it sideways. */
  .board-stage {
    width: 100% !important;
    max-width: 100% !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
    transform: none !important;
    display: flex !important;
    justify-content: center !important;
  }

  .game-area {
    padding: 0 !important;
    overflow-x: hidden !important;
  }

  /* ════════════════════════════════════════════════════════════
     PLAYER ROWS: minimal, flat, generous padding (Chess.com style)
     ════════════════════════════════════════════════════════════ */
  .player-card {
    display: flex !important;
    align-items: center !important;
    gap: 10px !important;
    min-height: 56px !important;
    padding: 8px 16px !important;
    border: 0 !important;
    border-radius: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
    grid-template-columns: none !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }
  .player-card.top {
    border-radius: 0 !important;
  }
  .player-card.bottom {
    border-radius: 0 !important;
  }

  /* Avatar: clean rounded square like Chess.com */
  .player-card .avatar {
    width: 36px !important;
    height: 36px !important;
    min-width: 36px !important;
    border-radius: 8px !important;
    font-size: 15px !important;
  }
  .player-card .avatar.avatar-letter .avatar-letter-glyph {
    font-size: 19px !important;
  }

  /* Name: clean, readable, sans-serif weight */
  .player-card .player-meta {
    display: flex !important;
    align-items: center !important;
    gap: 8px !important;
    min-width: 0;
    flex: 1;
  }
  .player-card .player-name {
    font-size: 16px !important;
    font-weight: 600 !important;
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .player-card .player-detail {
    display: none !important;
  }

  /* Captured pieces row under the name */
  .captured-pieces {
    height: 16px;
    gap: 0;
  }
  .captured-pieces img,
  .captured-pieces svg {
    width: 15px !important;
    height: 15px !important;
  }

  /* Clock: Chess.com-style chip — dark rounded box, bold mono-ish */
  .player-card .clock {
    font-size: 19px !important;
    font-weight: 700 !important;
    min-width: 78px !important;
    max-width: 96px !important;
    padding: 7px 14px !important;
    border-radius: 8px !important;
    margin-left: auto;
    flex-shrink: 0;
    background: rgba(255, 255, 255, 0.06) !important;
    border: 0 !important;
    text-align: center;
    letter-spacing: 0.02em;
    box-sizing: border-box;
  }
  /* Active clock glows subtly (the player to move) */
  .player-card .clock.active {
    background: rgba(255, 255, 255, 0.14) !important;
    color: #fff !important;
  }

  /* ════════════════════════════════════════════════════════════
     TOOLBAR: hide during play, only essential during game
     Chess.com puts these in a bottom bar — we keep flip/draw/resign
     minimal and inline, hide the rest.
     ════════════════════════════════════════════════════════════ */
  .player-card-actions {
    gap: 4px !important;
    flex-shrink: 0;
    margin-right: 4px;
  }
  #btn-theme, #btn-sound, #btn-drag, #btn-chess-focus,
  #btn-engine-hints-top, #btn-video-toggle, .role-badge {
    display: none !important;
  }
  .player-card-actions .icon-button {
    width: 34px !important;
    height: 34px !important;
    min-width: 34px !important;
    min-height: 34px !important;
    font-size: 13px !important;
    border: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
    color: rgba(242, 236, 221, 0.55) !important;
  }
  .player-card-actions .icon-button:active {
    color: #f2ecdd !important;
  }

  /* ════════════════════════════════════════════════════════════
     TOP BAR (header): cleaner, flatter
     ════════════════════════════════════════════════════════════ */
  .top-bar, .app-header {
    padding: 6px 12px !important;
  }

  /* ════════════════════════════════════════════════════════════
     PANELS BELOW BOARD: flat cards, no heavy borders/glows
     ════════════════════════════════════════════════════════════ */
  .panel,
  .scoresheet-panel,
  .engine-panel,
  .device-panel,
  .blog-panel {
    border-radius: 12px !important;
    box-shadow: none !important;
    margin: 8px 10px !important;
  }

  /* ════════════════════════════════════════════════════════════
     START OVERLAY: flat, clean, Chess.com "new game" sheet feel
     ════════════════════════════════════════════════════════════ */
  .start-overlay .overlay-box {
    border-radius: 16px !important;
    border: 0 !important;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6) !important;
    max-width: min(360px, calc(100vw - 24px)) !important;
    padding: 22px 18px !important;
  }

  /* Time control chips: cleaner grid */
  .time-chip {
    border-radius: 10px !important;
  }

  /* ════════════════════════════════════════════════════════════
     GAME-OVER OVERLAY: compact, board visible behind
     ════════════════════════════════════════════════════════════ */
  .gameover-overlay {
    padding: 12px !important;
    background: rgba(0, 0, 0, 0.55) !important;
    backdrop-filter: blur(3px) !important;
  }
  .gameover-overlay .result-box {
    max-width: min(330px, calc(100vw - 24px)) !important;
    width: min(330px, calc(100vw - 24px)) !important;
    padding: 24px 20px 20px !important;
    border-radius: 16px !important;
    border: 0 !important;
  }
  .gameover-overlay .overlay-icon {
    width: 54px !important;
    height: 54px !important;
    margin: 0 auto 12px !important;
  }
  .gameover-overlay .overlay-icon svg {
    width: 28px !important;
    height: 28px !important;
  }
  .gameover-overlay .overlay-icon::before {
    width: 54px !important;
    height: 54px !important;
  }
  .gameover-overlay .overlay-title {
    font-size: 24px !important;
    line-height: 1.1 !important;
  }
  .gameover-overlay .overlay-desc {
    font-size: 13px !important;
    margin-top: 8px !important;
    line-height: 1.4 !important;
  }
  /* Game Review primary button — full width green like Chess.com */
  .gameover-actions {
    display: flex !important;
    flex-direction: column !important;
    gap: 8px !important;
    margin-top: 18px !important;
  }
  .gameover-actions .primary-button {
    order: -1; /* Play Again / Review at the top, full width */
    width: 100% !important;
    min-height: 48px !important;
    font-size: 15px !important;
    border-radius: 10px !important;
  }
  .gameover-actions .ghost-button {
    width: 100% !important;
    min-height: 42px !important;
    font-size: 13px !important;
    border-radius: 10px !important;
  }
  .result-close {
    top: 10px !important;
    right: 10px !important;
    width: 32px !important;
    height: 32px !important;
    min-width: 32px !important;
    min-height: 32px !important;
  }

  /* ════════════════════════════════════════════════════════════
     DURING PLAY: hide everything below board (cm-playing)
     ════════════════════════════════════════════════════════════ */
  .cm-playing .blog-panel,
  .cm-playing .device-panel,
  .cm-playing .info-sheet,
  .cm-playing .match-log,
  .cm-playing .video-pane,
  .cm-playing .app-footer,
  .cm-playing .records-rail > *:not(.scoresheet-panel),
  .cm-playing .side-panel > *:not(.scoresheet-panel) {
    display: none !important;
  }
  .cm-playing:not(.cm-online) .device-panel,
  .cm-playing:not(.cm-online) .video-pane {
    display: none !important;
  }

  /* DURING REVIEW: board + engine + scoresheet only */
  .cm-reviewing .blog-panel,
  .cm-reviewing .device-panel,
  .cm-reviewing .info-sheet,
  .cm-reviewing .match-log,
  .cm-reviewing .app-footer {
    display: none !important;
  }

  /* IDLE: blog hidden (in nav), rest scrollable */
  .cm-idle .blog-panel {
    display: none !important;
  }

  /* GAME OVER: panels hidden, board visible behind compact overlay */
  .cm-gameover .blog-panel,
  .cm-gameover .device-panel,
  .cm-gameover .info-sheet,
  .cm-gameover .match-log,
  .cm-gameover .app-footer {
    display: none !important;
  }
}

/* Very small phones */
@media (max-width: 380px) {
  .player-card .clock {
    font-size: 18px !important;
    min-width: 74px !important;
    padding: 6px 12px !important;
  }
  .player-card .avatar {
    width: 32px !important;
    height: 32px !important;
    min-width: 32px !important;
  }
  .player-card .player-name {
    font-size: 15px !important;
    max-width: 110px;
  }
}

/* Last word for mobile: the chessboard should use the full content width. */
@media (max-width: 620px) {
  .game-area {
    padding-left: 0 !important;
    padding-right: 0 !important;
  }

  .board-column,
  .board-stage,
  .board-frame,
  .chessboard {
    width: 100% !important;
    max-width: 100% !important;
  }
}