:root {
  color-scheme: dark;
  --bg: #090909;
  --panel: #141414;
  --panel-border: rgba(255, 255, 255, 0.1);
  --text: rgba(255, 255, 255, 0.94);
  --muted: rgba(255, 255, 255, 0.68);
  --accent: #d8d8d8;
  --shadow: 0 22px 60px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.07), transparent 42%),
    linear-gradient(180deg, #0e0e0e 0%, #050505 100%);
  color: var(--text);
  font-family: "Segoe UI", Inter, "Noto Sans", sans-serif;
}

.page-shell {
  width: min(1120px, calc(100vw - 48px));
  margin: 0 auto;
  padding: 48px 0 72px;
}

.sync-controls {
  display: flex;
  justify-content: center;
  margin-bottom: 24px;
}

.sync-toggle-button {
  appearance: none;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  font: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1;
  padding: 14px 22px;
  cursor: pointer;
  transition: background 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.sync-toggle-button:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.34);
  transform: translateY(-1px);
}

.sync-toggle-button[aria-pressed="true"] {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.42);
}

.player-stack {
  display: grid;
  gap: 28px;
}

.video-card {
  background: linear-gradient(180deg, rgba(22, 22, 22, 0.96), rgba(12, 12, 12, 0.96));
  border: 1px solid var(--panel-border);
  border-radius: 24px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.video-card__meta {
  padding: 24px 24px 0;
  text-align: left;
}

.video-card__meta h2 {
  margin: 0;
  font-size: 1.25rem;
  line-height: 1.3;
  font-weight: 600;
}

.player-shell {
  padding: 18px;
}

.player-shell video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 18px;
  background: #000;
  outline: none;
}

.footnote {
  max-width: 900px;
  margin: 28px auto 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.6;
  text-align: center;
}

.footnote-line {
  display: inline;
}

.footnote-line--primary::after {
  content: " ";
}

.footnote-line--credit {
  display: block;
}

@media (max-width: 768px) {
  .page-shell {
    width: min(100vw - 24px, 1120px);
    padding: 28px 0 52px;
  }

  .sync-controls {
    margin-bottom: 18px;
  }

  .sync-toggle-button {
    width: 100%;
    justify-content: center;
    padding: 13px 18px;
  }

  .footnote-line {
    display: block;
  }

  .footnote-line--primary::after {
    content: "";
  }

  .video-card__meta {
    padding: 18px 18px 0;
  }

  .video-card__meta h2 {
    font-size: 1.08rem;
  }

  .player-shell {
    padding: 12px;
  }
}