/**
 * Dinosaur Hall — fern-gold / volcanic amber / teal water museum look.
 * Development work by David Lane
 */

.dh-page {
  --dh-fern: #4a7a3c;
  --dh-fern-deep: #2a4a28;
  --dh-amber: #c48a3a;
  --dh-amber-hot: #e8a040;
  --dh-teal: #2a6a6e;
  --dh-ink: #1a2420;
  --dh-muted: #5a6b62;
  --dh-mist: #f4f0e8;
  --dh-mist-soft: #faf7f0;
  --dh-line: #d4c8b0;
  --dh-panel: #1e2a24;
  --dh-panel-ink: #f4f0e8;
  --dh-volcanic: #8b3a2a;

  background: var(--dh-mist-soft);
  color: var(--dh-ink);
  font-family: 'Source Sans 3', system-ui, -apple-system, 'Segoe UI', sans-serif;
}

.dh-skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 10000;
  padding: 0.75rem 1rem;
  background: var(--dh-fern-deep);
  color: #fff;
  font-weight: 600;
}

.dh-skip:focus {
  left: 1rem;
  top: 1rem;
}

.dh-main {
  padding-bottom: 3rem;
}

.dh-hero {
  position: relative;
  min-height: min(88vh, 820px);
  overflow: hidden;
  border-bottom: 1px solid var(--dh-line);
  background:
    radial-gradient(ellipse at 20% 0%, rgba(196, 138, 58, 0.18), transparent 55%),
    radial-gradient(ellipse at 90% 20%, rgba(42, 106, 110, 0.14), transparent 50%),
    linear-gradient(165deg, #e8dcc8 0%, #c8b898 45%, #8a9a70 100%);
}

.dh-hero-stage-wrap {
  position: absolute;
  inset: 0;
  z-index: 0;
  /* Full stage is clickable — chrome floats above but does not steal center clicks */
  pointer-events: auto;
}

.dh-canvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: grab;
}

.dh-hero-fallback {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, #e8a060 0%, #c48a3a 40%, #6b5a3c 100%);
  pointer-events: none;
}

.dh-fallback-ridge {
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  width: 100%;
  height: 45%;
  opacity: 0.35;
  fill: var(--dh-fern-deep);
}

.dh-fallback-silhouettes {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 8% 18% at 30% 72%, #1a2420 0%, transparent 70%),
    radial-gradient(ellipse 18% 12% at 58% 70%, #1a2420 0%, transparent 70%),
    radial-gradient(ellipse 4% 10% at 78% 75%, #1a2420 0%, transparent 70%);
  opacity: 0.55;
}

.dh-stage-hud {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  pointer-events: none;
  max-width: calc(100% - 2rem);
}

.dh-stage-hud .dh-btn {
  pointer-events: auto;
}

.dh-stage-status {
  margin: 0;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(30, 42, 36, 0.55);
  color: var(--dh-panel-ink);
  font-size: 0.8rem;
  backdrop-filter: blur(6px);
}

/* Compact top chrome — keeps diorama visible (no big opaque hero cards) */
.dh-hero-chrome {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  z-index: 3;
  padding: 0.85rem 1rem 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(26, 36, 32, 0.45) 0%, rgba(26, 36, 32, 0.12) 70%, transparent 100%);
}

.dh-hero-chrome .dh-btn,
.dh-hero-chrome a,
.dh-hero-chrome button,
.dh-hero-chrome input,
.dh-hero-chrome label {
  pointer-events: auto;
}

.dh-hero-mast {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1rem;
  max-width: 1200px;
  margin: 0 auto;
}

.dh-hero-brand {
  min-width: 0;
}

.dh-kicker {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: rgba(232, 200, 120, 0.95);
  margin: 0 0 0.15rem;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.35);
}

.dh-hero-title {
  font-family: Fraunces, Georgia, serif;
  font-weight: 700;
  font-size: clamp(1.55rem, 3.5vw, 2.25rem);
  line-height: 1.1;
  color: #faf7f0;
  margin: 0;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.45);
}

.dh-hero-line {
  font-size: 0.95rem;
  color: var(--dh-muted);
  margin-bottom: 1rem;
  max-width: 36rem;
}

.dh-hero-line--slim {
  max-width: 1200px;
  margin: 0.45rem auto 0;
  padding: 0 0.15rem;
  font-size: 0.85rem;
  color: rgba(250, 247, 240, 0.88);
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.4);
}

.dh-hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0;
}

.dh-hero-tools {
  max-width: 1200px;
  margin: 0.55rem auto 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem 1rem;
}

.dh-hero-tools .dh-guide-status {
  margin: 0 !important;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--dh-amber-hot) !important;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.4);
}

.dh-hero-tools .dh-story-narrate {
  color: rgba(250, 247, 240, 0.9);
  font-size: 0.8rem;
}

.dh-hero-chrome .dh-btn-ghost {
  background: rgba(255, 255, 255, 0.14);
  color: #faf7f0;
  border-color: rgba(255, 255, 255, 0.28);
}

.dh-hero-chrome .dh-btn-ghost:hover {
  background: rgba(255, 255, 255, 0.24);
  color: #fff;
}

.dh-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border-radius: 999px;
  padding: 0.55rem 1rem;
  font-weight: 600;
  font-size: 0.9rem;
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.dh-btn:hover {
  transform: translateY(-1px);
}

.dh-btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
}

.dh-btn-primary {
  background: var(--dh-fern);
  color: #fff;
  border-color: var(--dh-fern-deep);
  box-shadow: 0 6px 16px rgba(42, 74, 40, 0.25);
}

.dh-btn-primary:hover {
  background: var(--dh-fern-deep);
  color: #fff;
}

.dh-btn-sand {
  background: var(--dh-amber);
  color: #1a2420;
  border-color: #a8722e;
}

.dh-btn-ghost {
  background: rgba(255, 255, 255, 0.7);
  color: var(--dh-ink);
  border-color: var(--dh-line);
}

.dh-guide-card {
  padding: 1rem 1.1rem;
  border-radius: 16px;
  background: rgba(30, 42, 36, 0.88);
  color: var(--dh-panel-ink);
  border: 1px solid rgba(196, 138, 58, 0.35);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.2);
}

.dh-guide-card h2 {
  font-family: Fraunces, Georgia, serif;
  font-size: 1.15rem;
  margin: 0 0 0.4rem;
}

.dh-guide-card p {
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  opacity: 0.92;
}

.dh-guide-status {
  margin: 0 !important;
  font-weight: 600;
  color: var(--dh-amber-hot) !important;
}

.dh-story-mode {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--dh-line);
}

.dh-story-mode-header {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
}

.dh-story-mode-kicker {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dh-amber);
}

.dh-story-narrate {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  margin: 0;
  cursor: pointer;
}

.dh-story-mode-copy {
  font-size: 0.85rem;
  color: var(--dh-muted);
  margin: 0.4rem 0 0;
}

.dh-story-status {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
}

.dh-story-dots {
  display: flex;
  gap: 0.3rem;
}

.dh-story-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--dh-line);
}

.dh-story-dot.is-done {
  background: var(--dh-fern);
}

.dh-story-dot.is-active {
  background: var(--dh-amber);
  box-shadow: 0 0 0 3px rgba(196, 138, 58, 0.3);
}

.dh-story-error {
  color: var(--dh-volcanic);
  font-size: 0.85rem;
  margin: 0.4rem 0 0;
}

.dh-onboarding {
  margin: 1.5rem 0;
  padding: 1rem 1.15rem;
  border-radius: 12px;
  border-left: 4px solid var(--dh-amber);
  background: #fff;
  border: 1px solid var(--dh-line);
  border-left-width: 4px;
  box-shadow: 0 4px 14px rgba(26, 36, 32, 0.05);
}

.dh-section {
  margin: 2.25rem 0;
}

.dh-section-head h2 {
  font-family: Fraunces, Georgia, serif;
  font-size: clamp(1.5rem, 3vw, 1.9rem);
  margin-bottom: 0.35rem;
}

.dh-section-head p {
  color: var(--dh-muted);
  max-width: 40rem;
}

.dh-era-chips,
.dh-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
}

.dh-chip {
  border-radius: 999px;
  border: 1px solid var(--dh-line);
  background: #fff;
  color: var(--dh-ink);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 0.4rem 0.9rem;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.dh-chip:hover {
  border-color: var(--dh-fern);
}

.dh-chip.is-active {
  background: var(--dh-fern);
  border-color: var(--dh-fern-deep);
  color: #fff;
}

.dh-era-panel {
  padding: 1.1rem 1.25rem;
  border-radius: 14px;
  background: #fff;
  border: 1px solid var(--dh-line);
  box-shadow: 0 6px 18px rgba(26, 36, 32, 0.06);
}

.dh-era-panel h3 {
  font-family: Fraunces, Georgia, serif;
  margin: 0 0 0.2rem;
}

.dh-era-years {
  font-weight: 700;
  color: var(--dh-amber);
  margin-bottom: 0.5rem;
}

.dh-species-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}

.dh-card {
  display: flex;
  flex-direction: column;
  border-radius: 14px;
  overflow: hidden;
  background: #fff;
  border: 2px solid var(--dh-line);
  cursor: pointer;
  text-align: left;
  padding: 0;
  color: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.dh-card:hover,
.dh-card:focus-visible {
  border-color: var(--dh-fern);
  box-shadow: 0 10px 24px rgba(42, 74, 40, 0.12);
  transform: translateY(-2px);
  outline: none;
}

.dh-card.is-selected {
  border-color: var(--dh-amber);
  box-shadow: 0 0 0 3px rgba(196, 138, 58, 0.35);
}

.dh-card-img {
  width: 100%;
  height: 140px;
  object-fit: cover;
  background: #e8e0d0;
}

.dh-card-body {
  padding: 0.85rem 1rem 1rem;
}

.dh-card-body h3 {
  font-family: Fraunces, Georgia, serif;
  font-size: 1.1rem;
  margin: 0 0 0.2rem;
}

.dh-card-binom {
  font-size: 0.8rem;
  font-style: italic;
  color: var(--dh-muted);
  margin-bottom: 0.45rem;
}

.dh-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.dh-tag {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.15rem 0.45rem;
  border-radius: 6px;
  background: var(--dh-mist);
  color: var(--dh-fern-deep);
}

.dh-tag--warn {
  background: rgba(139, 58, 42, 0.12);
  color: var(--dh-volcanic);
}

.dh-detail-layout {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 768px) {
  .dh-detail-layout {
    grid-template-columns: minmax(220px, 360px) 1fr;
  }
}

.dh-detail-media {
  margin: 0;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--dh-line);
  background: #fff;
}

.dh-detail-media img {
  width: 100%;
  height: auto;
  display: block;
  max-height: 280px;
  object-fit: cover;
}

.dh-detail-media figcaption {
  padding: 0.5rem 0.75rem;
  font-size: 0.75rem;
  color: var(--dh-muted);
}

.dh-binom {
  font-style: italic;
  color: var(--dh-muted);
}

.dh-evidence-box {
  padding: 0.9rem 1rem;
  border-radius: 12px;
  background: rgba(196, 138, 58, 0.1);
  border: 1px solid rgba(196, 138, 58, 0.35);
  margin: 1rem 0;
}

.dh-meta-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 0.75rem;
  margin: 0 0 1rem;
}

.dh-meta-list dt {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--dh-muted);
}

.dh-meta-list dd {
  margin: 0;
  font-weight: 600;
}

.dh-compare-result {
  margin-top: 1.25rem;
  padding: 1.1rem;
  border-radius: 14px;
  background: #fff;
  border: 1px solid var(--dh-line);
}

.dh-compare-bars {
  display: grid;
  gap: 0.85rem;
}

.dh-compare-row {
  display: grid;
  gap: 0.35rem;
}

.dh-compare-label {
  display: flex;
  justify-content: space-between;
  font-weight: 600;
  font-size: 0.9rem;
}

.dh-compare-track {
  height: 14px;
  border-radius: 999px;
  background: var(--dh-mist);
  overflow: hidden;
}

.dh-compare-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--dh-fern), var(--dh-amber));
  min-width: 4px;
  transition: width 0.45s ease;
}

.dh-compare-summary {
  margin: 1rem 0 0;
  color: var(--dh-muted);
}

.dh-quiz-board {
  display: grid;
  gap: 1rem;
}

.dh-quiz-card {
  padding: 1.1rem 1.2rem;
  border-radius: 14px;
  background: #fff;
  border: 1px solid var(--dh-line);
}

.dh-quiz-card h3 {
  font-family: Fraunces, Georgia, serif;
  font-size: 1.1rem;
  margin: 0 0 0.75rem;
}

.dh-quiz-choices {
  display: grid;
  gap: 0.45rem;
}

.dh-quiz-choice {
  text-align: left;
  border-radius: 10px;
  border: 1px solid var(--dh-line);
  background: var(--dh-mist-soft);
  padding: 0.65rem 0.85rem;
  font-weight: 600;
  cursor: pointer;
}

.dh-quiz-choice:hover:not(:disabled) {
  border-color: var(--dh-fern);
}

.dh-quiz-choice.is-correct {
  border-color: var(--dh-fern);
  background: rgba(74, 122, 60, 0.15);
}

.dh-quiz-choice.is-wrong {
  border-color: var(--dh-volcanic);
  background: rgba(139, 58, 42, 0.12);
}

.dh-quiz-explain {
  margin: 0.75rem 0 0;
  font-size: 0.9rem;
  color: var(--dh-muted);
}

.dh-quiz-score {
  margin-top: 1rem;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--dh-fern-deep);
}

.dh-story-overlay {
  position: fixed;
  left: 1rem;
  right: 1rem;
  bottom: 1.25rem;
  z-index: 9000;
  pointer-events: none;
  display: flex;
  justify-content: center;
}

.dh-story-chip {
  display: flex;
  gap: 0.85rem;
  max-width: 520px;
  padding: 0.9rem 1rem;
  border-radius: 16px;
  background: rgba(30, 42, 36, 0.92);
  color: var(--dh-panel-ink);
  border: 1px solid rgba(196, 138, 58, 0.45);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(10px);
}

.dh-story-chip.is-beat {
  animation: dh-chip-beat 0.45s ease;
}

@keyframes dh-chip-beat {
  0% { transform: scale(0.98); }
  50% { transform: scale(1.02); }
  100% { transform: scale(1); }
}

.dh-story-chip-img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--dh-amber);
  flex-shrink: 0;
}

.dh-story-kicker {
  margin: 0;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dh-amber-hot);
}

.dh-story-title {
  margin: 0.15rem 0;
  font-family: Fraunces, Georgia, serif;
  font-size: 1.05rem;
  font-weight: 700;
}

.dh-story-copy,
.dh-story-progress {
  margin: 0;
  font-size: 0.85rem;
  opacity: 0.9;
}

.dh-story-spotlight {
  outline: 3px solid var(--dh-amber);
  outline-offset: 4px;
  border-radius: 8px;
}

body.dh-story-running .dh-hero-cta .dh-btn-sand {
  background: var(--dh-volcanic);
  color: #fff;
  border-color: #6a2a1e;
}

@media (prefers-reduced-motion: reduce) {
  .dh-btn,
  .dh-card,
  .dh-compare-fill,
  .dh-story-chip {
    transition: none !important;
    animation: none !important;
  }
}

body.dark-mode .dh-page,
.dark-mode .dh-page {
  --dh-mist: #1e2a24;
  --dh-mist-soft: #15201c;
  --dh-ink: #f4f0e8;
  --dh-muted: #b0bca8;
  --dh-line: #3a4a40;
}

body.dark-mode .dh-onboarding,
body.dark-mode .dh-era-panel,
body.dark-mode .dh-card,
body.dark-mode .dh-compare-result,
body.dark-mode .dh-quiz-card,
body.dark-mode .dh-detail-media,
.dark-mode .dh-onboarding,
.dark-mode .dh-era-panel,
.dark-mode .dh-card,
.dark-mode .dh-compare-result,
.dark-mode .dh-quiz-card,
.dark-mode .dh-detail-media {
  background: #1e2a24;
  color: var(--dh-ink);
  border-color: var(--dh-line);
}

body.dark-mode .dh-chip,
.dark-mode .dh-chip {
  background: #24332c;
  color: var(--dh-ink);
}

body.dark-mode .dh-btn-ghost,
.dark-mode .dh-btn-ghost {
  background: rgba(30, 42, 36, 0.85);
  color: var(--dh-ink);
}