/* Shared dark theme for Celestia presentation */

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #000;
  color: #e8e8f0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  min-height: 100vh;
}

a {
  color: #9eb8ff;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

button {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.35);
  padding: 8px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  font-family: inherit;
  transition: background 0.15s ease;
}

button:hover {
  background: rgba(255, 255, 255, 0.16);
}

/* ── Homepage ── */

.home {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 20px 48px;
}

.home-header {
  text-align: center;
  margin-bottom: 12px;
}

.home-header h1 {
  margin: 0 0 8px;
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, #fff 0%, #9eb8ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.home-header .subtitle {
  margin: 0;
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.95rem;
}

.hint-banner {
  text-align: center;
  margin: 20px 0 28px;
  padding: 10px 16px;
  background: rgba(158, 184, 255, 0.08);
  border: 1px solid rgba(158, 184, 255, 0.2);
  border-radius: 8px;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
}

.hint-banner .hint-desktop {
  display: inline;
}

.hint-banner .hint-touch {
  display: none;
}

@media (hover: none) {
  .hint-banner .hint-desktop {
    display: none;
  }

  .hint-banner .hint-touch {
    display: inline;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hint-banner .hint-desktop {
    display: none;
  }

  .hint-banner .hint-touch {
    display: inline;
  }
}

.full-deck-cta {
  display: flex;
  justify-content: center;
  margin-bottom: 32px;
}

.full-deck-cta a {
  display: inline-block;
  padding: 12px 24px;
  background: rgba(158, 184, 255, 0.12);
  border: 1px solid rgba(158, 184, 255, 0.35);
  border-radius: 8px;
  color: #c8d8ff;
  font-size: 0.95rem;
  text-decoration: none;
  transition: background 0.15s ease;
}

.full-deck-cta a:hover {
  background: rgba(158, 184, 255, 0.22);
  text-decoration: none;
}

.scene-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.scene-card {
  position: relative;
  display: flex;
  flex-direction: column;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: #0a0a12;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.scene-card:hover,
.scene-card:focus-visible {
  border-color: rgba(158, 184, 255, 0.45);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  text-decoration: none;
  outline: none;
}

.scene-card:focus-visible {
  box-shadow: 0 0 0 2px rgba(158, 184, 255, 0.5);
}

.scene-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #0a0a12;
  overflow: hidden;
}

.scene-thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.75) 0%,
    rgba(0, 0, 0, 0.15) 45%,
    transparent 70%
  );
  pointer-events: none;
  z-index: 1;
}

.scene-thumb-num {
  position: absolute;
  top: 12px;
  left: 14px;
  z-index: 2;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(158, 184, 255, 0.9);
  background: rgba(0, 0, 0, 0.45);
  padding: 4px 8px;
  border-radius: 4px;
}

.scene-thumb-title {
  position: absolute;
  bottom: 12px;
  left: 14px;
  right: 14px;
  z-index: 2;
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.8);
}

.scene-poster,
.scene-thumb video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.scene-poster {
  transition: opacity 0.25s ease;
}

.scene-thumb video {
  opacity: 0;
  transition: opacity 0.25s ease;
}

.scene-card.is-previewing .scene-poster {
  opacity: 0;
}

.scene-card.is-previewing .scene-thumb video {
  opacity: 1;
}

.scene-body {
  padding: 14px 16px 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.scene-body p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.45;
  color: rgba(255, 255, 255, 0.6);
}

.scene-meta {
  margin-top: auto;
  padding-top: 8px;
  font-size: 0.75rem;
  color: rgba(158, 184, 255, 0.75);
}

.card-action-hint {
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.35);
  margin-top: 4px;
}

@media (hover: none) {
  .card-action-hint .hint-hover {
    display: none;
  }
}

@media (hover: hover) {
  .card-action-hint .hint-tap {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .card-action-hint .hint-hover {
    display: none;
  }

  .card-action-hint .hint-tap {
    display: inline;
  }
}

/* ── Deck player ── */

.deck-body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  overflow: hidden;
}

.deck-body video {
  width: 90%;
  max-height: 90vh;
}

.deck-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.35);
  background: rgba(0, 0, 0, 0.45);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.deck-nav svg {
  width: 22px;
  height: 22px;
  display: block;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.deck-nav:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.6);
}

.deck-nav:active:not(:disabled) {
  background: rgba(255, 255, 255, 0.28);
}

.deck-nav:disabled {
  opacity: 0.2;
  cursor: default;
}

.deck-nav-prev {
  left: max(8px, env(safe-area-inset-left));
}

.deck-nav-next {
  right: max(8px, env(safe-area-inset-right));
}

@media (min-width: 768px) {
  .deck-nav {
    width: 48px;
    height: 48px;
  }

  .deck-nav svg {
    width: 24px;
    height: 24px;
  }

  .deck-nav-prev {
    left: max(20px, env(safe-area-inset-left));
  }

  .deck-nav-next {
    right: max(20px, env(safe-area-inset-right));
  }
}

.deck-top-bar {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: min(90%, 960px);
  color: #fff;
  font-size: 14px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}

.deck-top-left {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.deck-top-left .back-link {
  font-size: 13px;
  color: rgba(158, 184, 255, 0.85);
}

.deck-top-left .scene-title {
  font-size: 15px;
  font-weight: 600;
}

.deck-top-left .clip-counter {
  opacity: 0.65;
  font-size: 13px;
}

.deck-top-right {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-shrink: 0;
}

.deck-controls {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  width: min(80%, 800px);
}

.deck-bottom-label {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  color: #fff;
  font-size: 16px;
  opacity: 0.8;
  white-space: nowrap;
  max-width: 90%;
  overflow: hidden;
  text-overflow: ellipsis;
}

.progress-container {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 3px;
  overflow: hidden;
}

.progress {
  height: 100%;
  width: 0%;
  background: #fff;
  transition: width 0.1s linear;
}

@media (prefers-reduced-motion: reduce) {
  .progress {
    transition: none;
  }

  .scene-card {
    transition: none;
  }
}