.live-chess-page .fullscreen-toggle-btn.is-active {
  background: rgba(199, 210, 254, 0.16);
  border-color: var(--accent);
  color: var(--accent-strong);
}

.live-chess-page.live-chess-app-mode {
  --fullscreen-board-size: min(100%, calc(100dvw - 26rem), calc(100dvh - 18rem), 860px);
}

.live-chess-page.live-chess-app-mode .wrap {
  min-height: 100dvh;
  padding: 0;
}

.live-chess-page.live-chess-app-mode .site-header {
  display: none;
}

.live-chess-page.live-chess-app-mode .shell {
  max-width: none;
  min-height: 100dvh;
  height: 100dvh;
  margin: 0;
  padding-top: max(0.8rem, env(safe-area-inset-top, 0px));
  padding-right: max(0.8rem, env(safe-area-inset-right, 0px));
  padding-bottom: max(0.9rem, env(safe-area-inset-bottom, 0px));
  padding-left: max(0.8rem, env(safe-area-inset-left, 0px));
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable both-edges;
}

.live-chess-page.live-chess-app-mode .hero {
  grid-template-columns: minmax(0, 1fr) minmax(360px, 460px);
  gap: 0.65rem;
  margin-bottom: 0.65rem;
}

.live-chess-page.live-chess-app-mode .hero-copy-wrap {
  gap: 0.7rem;
}

.live-chess-page.live-chess-app-mode .eyebrow {
  margin-bottom: 0.18rem;
  font-size: 0.64rem;
  letter-spacing: 0.18em;
}

.live-chess-page.live-chess-app-mode .hero h1 {
  font-size: clamp(2rem, 3.4vw, 3.15rem);
}

.live-chess-page.live-chess-app-mode .hero-summary {
  display: none;
}

.live-chess-page.live-chess-app-mode .hero-chip-row {
  margin-top: 0.7rem;
}

.live-chess-page.live-chess-app-mode .hero-chip {
  min-height: 1.85rem;
  padding: 0.34rem 0.62rem;
  font-size: 0.68rem;
}

.live-chess-page.live-chess-app-mode .hero-status-card {
  padding: 0.42rem;
}

.live-chess-page.live-chess-app-mode .hero-status-grid-wide {
  gap: 0.38rem;
}

.live-chess-page.live-chess-app-mode .hero-status-card .stat {
  padding: 0.42rem 0.5rem;
}

.live-chess-page.live-chess-app-mode .hero-status-card .stat-value {
  white-space: normal;
  line-height: 1.05;
  font-size: clamp(0.92rem, 1.3vw, 1.12rem);
}

.live-chess-page.live-chess-app-mode .live-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 0.9rem;
  align-items: start;
}

.live-chess-page.live-chess-app-mode .board-card {
  padding: 0.82rem;
}

.live-chess-page.live-chess-app-mode .board-toolbar {
  gap: 0.65rem;
  margin-bottom: 0.75rem;
}

.live-chess-page.live-chess-app-mode .board-wrap {
  padding: 0.75rem;
}

.live-chess-page.live-chess-app-mode .chess-board {
  width: var(--fullscreen-board-size);
}

.live-chess-page.live-chess-app-mode .board-footer {
  max-width: var(--fullscreen-board-size);
  margin-top: 0.7rem;
}

.live-chess-page.live-chess-app-mode .board-note {
  padding: 0.58rem 0.72rem;
}

.live-chess-page.live-chess-app-mode .side-stack {
  margin-top: 0;
  grid-template-columns: 1fr;
  align-content: start;
}

.live-chess-page.live-chess-app-mode .history-list {
  max-height: min(36vh, 22rem);
}

@media (max-width: 1080px) {
  .live-chess-page.live-chess-app-mode {
    --fullscreen-board-size: min(100%, calc(100dvh - 18rem), 720px);
  }

  .live-chess-page.live-chess-app-mode .hero {
    grid-template-columns: 1fr;
  }

  .live-chess-page.live-chess-app-mode .live-layout {
    grid-template-columns: 1fr;
  }

  .live-chess-page.live-chess-app-mode .side-stack {
    margin-top: 0.9rem;
  }
}

@media (max-width: 720px) {
  .live-chess-page.live-chess-app-mode {
    --fullscreen-board-size: min(100%, calc(100dvh - 15.5rem));
  }

  .live-chess-page.live-chess-app-mode .shell {
    padding-top: max(0.7rem, env(safe-area-inset-top, 0px));
    padding-right: max(0.7rem, env(safe-area-inset-right, 0px));
    padding-bottom: max(0.8rem, env(safe-area-inset-bottom, 0px));
    padding-left: max(0.7rem, env(safe-area-inset-left, 0px));
  }

  .live-chess-page.live-chess-app-mode .hero-chip-row {
    display: none;
  }

  .live-chess-page.live-chess-app-mode .hero-status-card .stat-value {
    font-size: 0.98rem;
  }

  .live-chess-page.live-chess-app-mode .toolbar-actions {
    width: 100%;
  }

  .live-chess-page.live-chess-app-mode .tool-btn {
    flex: 1 1 9rem;
    justify-content: center;
  }

  .live-chess-page.live-chess-app-mode .fullscreen-toggle-btn {
    min-width: 0;
  }
}