/* ──────────────────────────────────────────────────────────────────────
   Seasons and the Heavens Lesson CSS
   Earth Science · Interactive Orbital Simulator
   ────────────────────────────────────────────────────────────────────── */

/* ─── Root variables ──────────────────────────────────────────────────── */
:root {
  --sth-primary-gold: #d4a574;
  --sth-primary-blue: #4a90e2;
  --sth-earth-green: #2d5a2d;
  --sth-ice-blue: #b0d4e3;
  --sth-accent-orange: #ff8c42;
  --sth-accent-purple: #8b7fbf;
  --sth-text-dark: #1d1d1f;
  --sth-text-medium: #3f4f65;
  --sth-text-light: #64748b;
  --sth-bg-light: #f5f5f7;
  --sth-bg-white: #ffffff;
  --sth-card-border: #d2d2d7;
  --sth-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --sth-shadow-md: 0 8px 20px rgba(0, 0, 0, 0.08);
  --sth-shadow-lg: 0 12px 34px rgba(0, 0, 0, 0.08);
}

.ll-viewport {
  --ll-panel-w: 300px;
  --ll-accent: #4a90e2;
  --ll-tab-active: #4a90e2;
  --ll-tab-active-bg: rgba(74, 144, 226, 0.12);
}

[data-theme="night"] {
  --sth-text-dark: #f5f5f7;
  --sth-text-medium: rgba(245, 245, 247, 0.8);
  --sth-text-light: rgba(245, 245, 247, 0.6);
  --sth-bg-white: #2c2c2e;
  --sth-bg-light: #1a1a1c;
  --sth-card-border: #424245;
}

/* ─── Page Layout ─────────────────────────────────────────────────────── */
.sth-page {
  padding-bottom: 4rem;
}

/* ─── Hero Section ────────────────────────────────────────────────────── */
.sth-hero {
  padding: 1.5rem 0 2.5rem;
  text-align: left;
  margin-bottom: 2.5rem;
}

.sth-hero h1 {
  max-width: 35ch;
  margin: 0 0 0.8rem;
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--sth-text-dark);
  background: linear-gradient(135deg, var(--sth-primary-blue), var(--sth-primary-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sth-hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.7rem;
  margin-bottom: 1rem;
  font-size: 0.82rem;
  color: var(--sth-text-light);
}

.sth-hero-meta .dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.4;
  display: inline-block;
}

.sth-lede {
  max-width: 70ch;
  margin: 0 0 1.5rem;
  font-size: 1.1rem;
  line-height: 1.65;
  color: var(--sth-text-medium);
}

.sth-hero-verse {
  margin-top: 2rem;
  padding: 1.2rem 1.5rem;
  background: linear-gradient(135deg, rgba(212, 165, 116, 0.1), rgba(74, 144, 226, 0.08));
  border: 2px solid var(--sth-primary-gold);
  border-radius: 14px;
  text-align: center;
}

.sth-verse-text {
  margin: 0 0 0.6rem;
  font-size: 1rem;
  font-weight: 500;
  font-style: italic;
  color: var(--sth-text-medium);
  line-height: 1.65;
}

.sth-verse-ref {
  margin: 0;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--sth-text-light);
  letter-spacing: 0.05em;
}

/* ─── Interactive Stages ──────────────────────────────────────────────── */
.sth-stages {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.6rem;
  margin: 1.5rem 0;
  padding: 1rem;
  background: rgba(74, 144, 226, 0.05);
  border-radius: 12px;
}

.sth-stage-btn {
  padding: 0.8rem 1rem;
  background: var(--sth-bg-white);
  border: 2px solid var(--sth-card-border);
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  color: var(--sth-text-medium);
}

.sth-stage-btn:hover {
  border-color: var(--sth-primary-blue);
  background: rgba(74, 144, 226, 0.08);
}

.sth-stage-btn.active {
  background: linear-gradient(135deg, var(--sth-primary-blue), #2969b8);
  border-color: var(--sth-primary-blue);
  color: #fff;
}

.sth-stage-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 800;
}

.sth-stage-btn.active .sth-stage-num {
  background: rgba(255, 255, 255, 0.5);
}

.sth-stage-content {
  position: relative;
  min-height: 350px;
  margin-top: 2rem;
}

.sth-stage-panel {
  display: none;
  opacity: 0;
  transition: opacity 0.3s ease;
  animation: fadeIn 0.4s ease forwards;
}

.sth-stage-panel.active {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
  opacity: 1;
}

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

.sth-stage-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  background: rgba(74, 144, 226, 0.08);
  border-radius: 12px;
  padding: 1rem;
}

.sth-stage-svg {
  width: 100%;
  height: auto;
  max-width: 280px;
}

.sth-stage-visual-embed {
  flex-direction: column;
  align-items: stretch;
  gap: 0.6rem;
}

.sth-sketchfab-embed {
  position: relative;
  width: 100%;
  min-height: 280px;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border-radius: 8px;
  background: #111827;
}

.sth-sketchfab-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.sth-model-credit {
  margin: 0;
  color: var(--sth-text-medium);
  font-size: 0.82rem;
  line-height: 1.4;
  text-align: center;
}

.sth-model-credit a {
  color: var(--sth-primary-blue);
  font-weight: 700;
  text-decoration: none;
}

.sth-model-credit a:hover,
.sth-model-credit a:focus-visible {
  text-decoration: underline;
}

.sth-stage-text h3 {
  margin-top: 0;
  color: var(--sth-primary-blue);
}

.sth-insight {
  padding: 1rem;
  background: linear-gradient(135deg, rgba(255, 176, 59, 0.1), rgba(255, 140, 66, 0.08));
  border-left: 3px solid var(--sth-accent-orange);
  border-radius: 8px;
  font-style: italic;
  color: var(--sth-text-medium);
  margin-top: 1rem;
}

@media (max-width: 768px) {
  .sth-stage-panel.active {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .sth-stage-visual {
    min-height: 250px;
  }

  .sth-sketchfab-embed {
    min-height: 240px;
  }
}

/* ─── Event Grid ──────────────────────────────────────────────────────── */
.sth-event-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.2rem;
  margin: 1.5rem 0;
}

.sth-event-card {
  padding: 1.2rem;
  background: var(--sth-bg-light);
  border: 1px solid var(--sth-card-border);
  border-radius: 12px;
  text-align: center;
  transition: all 0.2s ease;
}

.sth-event-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--sth-shadow-md);
  border-color: var(--sth-primary-blue);
}

.sth-event-emoji {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  display: block;
}

.sth-event-card h3 {
  margin: 0.5rem 0;
  font-size: 1rem;
}

.sth-event-date {
  display: block;
  margin: 0.5rem 0 0.8rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--sth-text-light);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.sth-event-card p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--sth-text-medium);
}

/* ─── Concept List ────────────────────────────────────────────────────── */
.sth-concept-list {
  margin: 1rem 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.sth-concept-list li {
  padding-left: 1.5rem;
  position: relative;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--sth-text-medium);
}

.sth-concept-list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--sth-primary-gold);
  font-size: 0.9rem;
  font-weight: 700;
}

/* ─── Latitude Table ──────────────────────────────────────────────────── */
.sth-latitude-table {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
}

.sth-latitude-row {
  padding: 1.2rem;
  background: var(--sth-bg-light);
  border: 1px solid var(--sth-card-border);
  border-radius: 10px;
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 1rem;
  align-items: start;
}

.sth-latitude-label {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--sth-primary-blue);
}

.sth-latitude-desc {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--sth-text-medium);
}

@media (max-width: 600px) {
  .sth-latitude-row {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
}

/* ─── Simulator Container ─────────────────────────────────────────────── */
.sth-simulator-container {
  margin: 1.5rem 0;
  padding: 1.5rem;
  background: rgba(74, 144, 226, 0.04);
  border: 1px solid rgba(74, 144, 226, 0.2);
  border-radius: 12px;
}


.sth-button-group {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: 0.5rem;
}

.sth-quick-btn {
  padding: 0.6rem 0.8rem;
  background: var(--sth-bg-light);
  border: 1px solid var(--sth-card-border);
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  color: var(--sth-text-medium);
}

.sth-quick-btn:hover {
  background: var(--sth-primary-blue);
  border-color: var(--sth-primary-blue);
  color: #fff;
}

.sth-quick-btn.active {
  background: linear-gradient(135deg, var(--sth-primary-blue), #2969b8);
  border-color: var(--sth-primary-blue);
  color: #fff;
}

.sth-control-row input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--sth-primary-blue);
}

.sth-canvas-container {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 1.5rem 0;
  padding: 1rem;
  background: linear-gradient(135deg, rgba(45, 90, 45, 0.08), rgba(176, 212, 227, 0.08));
  border-radius: 12px;
  overflow: hidden;
}

#sth-orbit-canvas {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
}

.sth-readout-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.sth-readout-value {
  display: block;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--sth-primary-blue);
  letter-spacing: -0.01em;
}

/* ─── Buttons ─────────────────────────────────────────────────────────── */
.sth-btn-primary {
  padding: 0.7rem 1.5rem;
  background: linear-gradient(135deg, var(--sth-primary-blue), #2969b8);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 12px rgba(74, 144, 226, 0.3);
}

.sth-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(74, 144, 226, 0.4);
}

.sth-btn-primary:active {
  transform: translateY(0);
}

.sth-btn-secondary {
  padding: 0.7rem 1.5rem;
  background: var(--sth-bg-light);
  color: var(--sth-text-medium);
  border: 1px solid var(--sth-card-border);
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.sth-btn-secondary:hover {
  background: var(--sth-primary-blue);
  color: #fff;
  border-color: var(--sth-primary-blue);
}

/* ─── Cultural Grid ───────────────────────────────────────────────────── */
.sth-cultural-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.2rem;
  margin: 1.5rem 0;
}

.sth-cultural-item {
  padding: 1.2rem;
  background: var(--sth-bg-light);
  border: 1px solid var(--sth-card-border);
  border-radius: 10px;
  transition: all 0.2s ease;
}

.sth-cultural-item:hover {
  border-color: var(--sth-primary-blue);
  box-shadow: 0 4px 12px rgba(74, 144, 226, 0.15);
}

.sth-cultural-item h3 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
  color: var(--sth-primary-blue);
}

.sth-cultural-item p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--sth-text-medium);
}

/* ─── Scripture Cards ─────────────────────────────────────────────────── */
.sth-verse-card {
  padding: 1.4rem;
  margin: 1.2rem 0;
  background: linear-gradient(135deg, rgba(212, 165, 116, 0.08), rgba(74, 144, 226, 0.06));
  border: 1px solid rgba(212, 165, 116, 0.3);
  border-left: 4px solid var(--sth-primary-gold);
  border-radius: 10px;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.sth-verse-icon {
  flex-shrink: 0;
  font-size: 1.5rem;
  color: var(--sth-primary-gold);
  line-height: 1;
}

.sth-verse-content {
  flex: 1;
}

.sth-verse-text {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
  font-weight: 500;
  font-style: italic;
  line-height: 1.65;
  color: var(--sth-text-medium);
}

.sth-verse-ref {
  display: block;
  margin: 0 0 0.8rem;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--sth-text-light);
  letter-spacing: 0.05em;
}

.sth-verse-reflection {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--sth-text-medium);
}

.sth-verse-marker {
  display: inline-block;
  margin-bottom: 0.6rem;
  padding: 0.3rem 0.8rem;
  background: var(--sth-primary-gold);
  color: var(--sth-text-dark);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  border-radius: 6px;
  letter-spacing: 0.05em;
}

.sth-closing-verse {
  margin-top: 2rem;
  padding: 1.5rem;
  background: linear-gradient(135deg, rgba(212, 165, 116, 0.1), rgba(74, 144, 226, 0.08));
  border: 2px solid var(--sth-primary-gold);
  border-radius: 12px;
  text-align: center;
}

/* ─── Vocabulary Grid ─────────────────────────────────────────────────── */
.sth-vocab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.sth-vocab-card {
  padding: 1.2rem;
  background: var(--sth-bg-light);
  border: 1px solid var(--sth-card-border);
  border-top: 3px solid var(--sth-primary-blue);
  border-radius: 10px;
  transition: all 0.2s ease;
}

.sth-vocab-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--sth-shadow-md);
}

.sth-vocab-card h4 {
  margin: 0 0 0.6rem;
  font-size: 0.95rem;
  color: var(--sth-primary-blue);
  font-weight: 700;
}

.sth-vocab-card p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--sth-text-medium);
}

/* ─── Challenge Section ───────────────────────────────────────────────── */
.sth-challenge-questions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
}

.sth-challenge-item {
  padding: 1rem 1.2rem;
  background: var(--sth-bg-light);
  border: 1px solid var(--sth-card-border);
  border-left: 4px solid var(--sth-accent-orange);
  border-radius: 10px;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.sth-challenge-num {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--sth-accent-orange), #ff6b4a);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 800;
  border-radius: 50%;
}

.sth-challenge-item p {
  margin: 0;
  flex: 1;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--sth-text-medium);
}

/* ─── Reflection Section ──────────────────────────────────────────────── */
.sth-reflection-text {
  margin: 1.5rem 0;
  padding: 1.5rem;
  background: rgba(212, 165, 116, 0.06);
  border-radius: 10px;
}

.sth-reflection-text p {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--sth-text-medium);
  margin-bottom: 1rem;
}

.sth-reflection-text p:last-child {
  margin-bottom: 0;
}

/* ─── Responsive Design ───────────────────────────────────────────────── */
@media (max-width: 768px) {
  .sth-card {
    padding: 1.2rem;
  }

  .sth-hero h1 {
    font-size: clamp(1.6rem, 4vw, 2.2rem);
  }

  .sth-stages {
    grid-template-columns: repeat(2, 1fr);
  }

  .sth-event-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .sth-cultural-grid {
    grid-template-columns: 1fr;
  }

  .sth-vocab-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .sth-verse-card {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .sth-hero-verse {
    padding: 1rem;
  }

  .sth-stages {
    grid-template-columns: 1fr;
  }

  .sth-stage-btn {
    flex-direction: row;
    justify-content: flex-start;
    gap: 0.6rem;
  }

  .sth-event-grid,
  .sth-cultural-grid,
  .sth-vocab-grid {
    grid-template-columns: 1fr;
  }

  .sth-btn-primary,
  .sth-btn-secondary {
    width: 100%;
  }

  .sth-readout-grid {
    grid-template-columns: 1fr;
  }

  #sth-orbit-canvas {
    max-width: 90vw;
  }
}

/* ─── Dark Mode Adjustments ───────────────────────────────────────────– */
[data-theme="night"] .sth-card {
  background: var(--sth-bg-white);
}

[data-theme="night"] .sth-hero h1 {
  background: linear-gradient(135deg, var(--sth-ice-blue), var(--sth-primary-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

[data-theme="night"] .sth-bg-light {
  background: #2c2c2e;
}

[data-theme="night"] .sth-event-card,
[data-theme="night"] .sth-vocab-card,
[data-theme="night"] .sth-cultural-item,
[data-theme="night"] .sth-latitude-row {
  background: #3a3a3c;
}

[data-theme="night"] .sth-stage-visual {
  background: rgba(74, 144, 226, 0.15);
}

[data-theme="night"] .sth-simulator-container {
  background: rgba(74, 144, 226, 0.08);
}

[data-theme="night"] .sth-reflection-text {
  background: rgba(212, 165, 116, 0.12);
}

/* ─── Print Styles ────────────────────────────────────────────────────── */
@media print {
  .sth-simulator-container,
  .sth-quiz-controls,
  #sth-orbit-canvas {
    display: none;
  }

  .sth-card {
    page-break-inside: avoid;
  }
}