/* ============================================================
   Demo Page — Side-by-Side Conversation Comparison
   Product name is set via --product-name in JS (see demo.html)
   ============================================================ */

:root {
  /* Brand colors — update these to rebrand */
  --color-primary: #6366f1;
  --color-primary-light: #818cf8;
  --color-primary-bg: #eef2ff;
  --color-primary-border: #c7d2fe;

  --color-default-bg: #f8f9fa;
  --color-default-border: #e2e8f0;
  --color-default-text: #64748b;

  --color-student-bg: #f0fdf4;
  --color-student-border: #bbf7d0;
  --color-student-text: #166534;

  --color-ai-steered-bg: #eef2ff;
  --color-ai-steered-border: #c7d2fe;
  --color-ai-steered-text: #3730a3;

  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-bg: #ffffff;
  --color-bg-page: #f8fafc;
  --color-border: #e2e8f0;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --transition: 0.2s ease;
}

/* ---- Reset & Base ---- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg-page);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---- Header ---- */
.demo-header {
  text-align: center;
  padding: 3rem 1.5rem 2rem;
  background: linear-gradient(135deg, var(--color-primary) 0%, #4f46e5 100%);
  color: white;
}

.demo-header h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.demo-header .subtitle {
  font-size: 1.1rem;
  opacity: 0.9;
  font-weight: 400;
  max-width: 600px;
  margin: 0 auto;
}

/* ---- Main Container ---- */
.demo-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

/* ---- Topic Selector ---- */
.topic-selector {
  display: flex;
  gap: 0.75rem;
  overflow-x: auto;
  padding: 0.5rem 0 1.5rem;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.topic-selector::-webkit-scrollbar {
  height: 4px;
}

.topic-selector::-webkit-scrollbar-track {
  background: transparent;
}

.topic-selector::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 2px;
}

.topic-card {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.375rem;
  padding: 0.75rem 1rem;
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  min-width: 110px;
  text-align: center;
}

.topic-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.topic-card.active {
  border-color: var(--color-primary);
  background: var(--color-primary-bg);
  box-shadow: var(--shadow-sm);
}

.topic-card .icon {
  font-size: 1.5rem;
  line-height: 1;
}

.topic-card .label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.topic-card .title {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.3;
}

.topic-card.active .label,
.topic-card.active .title {
  color: var(--color-primary);
}

/* ---- Question Banner ---- */
.question-banner {
  text-align: center;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
  background: var(--color-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.question-banner .grade-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  background: var(--color-primary-bg);
  border: 1px solid var(--color-primary-border);
  border-radius: 100px;
  padding: 0.2rem 0.6rem;
  margin-bottom: 0.5rem;
}

.question-banner .question-text {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
}

/* ---- Comparison Grid ---- */
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

/* ---- Column Panels ---- */
.column-panel {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.column-header {
  padding: 0.75rem 1.25rem;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.column-body {
  padding: 1.25rem;
  flex: 1;
}

/* Default AI column */
.column-panel.default-col {
  border: 1px solid var(--color-default-border);
  background: var(--color-bg);
}

.column-panel.default-col .column-header {
  background: var(--color-default-bg);
  color: var(--color-default-text);
  border-bottom: 1px solid var(--color-default-border);
}

.column-panel.default-col .column-body {
  color: #475569;
}

.default-response {
  font-size: 0.9rem;
  line-height: 1.7;
}

.default-response strong {
  display: block;
  margin-top: 1rem;
  margin-bottom: 0.25rem;
  color: var(--color-text);
  font-size: 0.85rem;
}

.default-response strong:first-child {
  margin-top: 0;
}

/* Steered AI column */
.column-panel.steered-col {
  border: 1px solid var(--color-primary-border);
  background: var(--color-bg);
}

.column-panel.steered-col .column-header {
  background: var(--color-primary);
  color: white;
}

/* ---- Conversation Turns ---- */
.turn {
  margin-bottom: 1rem;
  animation: fadeIn 0.3s ease;
}

.turn:last-child {
  margin-bottom: 0;
}

.turn-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.25rem;
}

.turn-bubble {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* Student turns */
.turn.student .turn-label {
  color: var(--color-student-text);
}

.turn.student .turn-bubble {
  background: var(--color-student-bg);
  border: 1px solid var(--color-student-border);
  color: #15803d;
}

/* AI turns */
.turn.ai .turn-label {
  color: var(--color-ai-steered-text);
}

.turn.ai .turn-bubble {
  background: var(--color-ai-steered-bg);
  border: 1px solid var(--color-ai-steered-border);
  color: var(--color-ai-steered-text);
}

/* ---- Insight Callout ---- */
.insight-callout {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 1rem 1.25rem;
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: var(--radius-sm);
  margin-bottom: 2rem;
}

.insight-callout .insight-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.insight-callout .insight-text {
  font-size: 0.9rem;
  color: #92400e;
  line-height: 1.5;
  font-style: italic;
}

/* ---- CTA Section ---- */
.cta-section {
  text-align: center;
  padding: 3rem 1.5rem;
  background: var(--color-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.cta-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.cta-section p {
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  font-size: 1rem;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
}

.cta-btn.primary {
  background: var(--color-primary);
  color: white;
}

.cta-btn.primary:hover {
  background: #4f46e5;
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.cta-btn.secondary {
  background: var(--color-bg);
  color: var(--color-text);
  border: 2px solid var(--color-border);
}

.cta-btn.secondary:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary);
}

/* ---- Site Nav ---- */
.site-nav {
  display: flex;
  gap: 0;
  background: #1e1b4b;
  padding: 0 1.5rem;
}

.nav-link {
  padding: 0.7rem 1.25rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  transition: all var(--transition);
  border-bottom: 2px solid transparent;
}

.nav-link:hover {
  color: rgba(255,255,255,0.9);
}

.nav-link.active {
  color: white;
  border-bottom-color: white;
}

/* ============================================================
   Steering Files Page
   ============================================================ */

/* ---- Intro ---- */
.sf-intro {
  max-width: 720px;
  margin: 0 auto 2rem;
  text-align: center;
}

.sf-intro p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 0.5rem;
}

.sf-intro a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
}

.sf-intro a:hover {
  text-decoration: underline;
}

/* ---- File Tabs ---- */
.sf-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  overflow-x: auto;
  padding-bottom: 0.25rem;
}

.sf-tab {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.65rem 1.25rem;
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  text-align: left;
  font-family: inherit;
}

.sf-tab:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-sm);
}

.sf-tab.active {
  border-color: var(--color-primary);
  background: var(--color-primary-bg);
}

.sf-tab-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-text);
}

.sf-tab-filename {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--color-text-muted);
}

.sf-tab.active .sf-tab-label {
  color: var(--color-primary);
}

/* ---- File Content ---- */
.sf-content {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  margin-bottom: 2.5rem;
  overflow: hidden;
}

.sf-file-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-page);
}

.sf-file-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.4rem;
}

.sf-filename {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
}

.sf-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.15rem 0.5rem;
  border-radius: 100px;
  border: 1px solid;
}

.sf-file-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ---- Rendered Markdown ---- */
.sf-rendered {
  padding: 1.5rem 1.5rem 1rem;
}

.sf-h1 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

.sf-h2 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
}

.sf-p {
  font-size: 0.9rem;
  color: #475569;
  line-height: 1.7;
  margin-bottom: 0.5rem;
}

.sf-directives {
  list-style: none;
  counter-reset: directive;
  padding: 0;
  margin: 0 0 0.5rem;
}

.sf-directives li {
  counter-increment: directive;
  position: relative;
  padding: 0.75rem 1rem 0.75rem 3rem;
  margin-bottom: 0.5rem;
  background: var(--color-bg-page);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  line-height: 1.6;
  color: #475569;
}

.sf-directives li::before {
  content: counter(directive);
  position: absolute;
  left: 0.85rem;
  top: 0.75rem;
  width: 1.4rem;
  height: 1.4rem;
  background: var(--color-primary);
  color: white;
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sf-directives li strong {
  color: var(--color-text);
}

.sf-phrase {
  color: var(--color-primary);
  font-style: italic;
}

.sf-actions {
  display: flex;
  gap: 0.75rem;
  margin: 0 1.5rem 1rem;
  flex-wrap: wrap;
}

.sf-clone-btn {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.8rem;
  font-size: 0.8rem;
  font-weight: 600;
  text-decoration: none;
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.sf-clone-btn:hover {
  background: #4f46e5;
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.sf-raw-toggle {
  display: inline-block;
  padding: 0.4rem 0.8rem;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-bg-page);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
}

.sf-raw-toggle:hover {
  color: var(--color-primary);
  border-color: var(--color-primary-light);
}

.sf-raw {
  display: none;
  margin: 0 1.5rem 1.5rem;
  padding: 1rem 1.25rem;
  background: #1e293b;
  color: #e2e8f0;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.7;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.sf-raw.visible {
  display: block;
}

/* ---- Anatomy Section ---- */
.sf-anatomy {
  margin-bottom: 2.5rem;
}

.sf-anatomy h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.sf-anatomy-intro {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  max-width: 680px;
}

.sf-anatomy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.sf-anatomy-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.sf-anatomy-num {
  width: 2rem;
  height: 2rem;
  background: var(--color-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.sf-anatomy-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.sf-anatomy-card p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.sf-anatomy-card p strong {
  color: var(--color-text);
}

/* ---- Animations ---- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .demo-header {
    padding: 2rem 1rem 1.5rem;
  }

  .demo-header h1 {
    font-size: 1.5rem;
  }

  .demo-header .subtitle {
    font-size: 0.95rem;
  }

  .demo-container {
    padding: 1.25rem 1rem 3rem;
  }

  .comparison-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .question-banner .question-text {
    font-size: 1.1rem;
  }

  .topic-card {
    min-width: 95px;
    padding: 0.6rem 0.75rem;
  }

  .topic-card .icon {
    font-size: 1.25rem;
  }

  .topic-card .title {
    font-size: 0.75rem;
  }

  .sf-anatomy-grid {
    grid-template-columns: 1fr;
  }

  .sf-rendered {
    padding: 1.25rem 1rem 0.75rem;
  }

  .sf-file-header {
    padding: 1rem 1rem;
  }

  .sf-raw-toggle {
    margin: 0 1rem 1rem;
  }

  .sf-raw {
    margin: 0 1rem 1rem;
  }
}

@media (max-width: 375px) {
  .demo-header h1 {
    font-size: 1.3rem;
  }

  .demo-container {
    padding: 1rem 0.75rem 2rem;
  }

  .topic-card {
    min-width: 85px;
    padding: 0.5rem 0.6rem;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }
}