/* TREF Site Styles - Unified */

/* ==========================================================================
   1. CSS VARIABLES
   ========================================================================== */

:root {
  /* Brand colors */
  --purple: #8B5CF6;
  --mint: #5CCCCC;
  --dark-purple: #2D1B4E;

  /* Grays */
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;

  /* Semantic */
  --success: #10B981;
  --error: #ef4444;

  /* Theme (light mode defaults) */
  --site-bg: #f8fafc;
  --site-text: var(--gray-800);
  --site-text-muted: var(--gray-600);
  --site-card-bg: #fff;
  --site-card-shadow: 0 4px 12px rgb(0 0 0 / 5%);
  --site-section-alt: #fff;
  --site-highlight-bg: rgb(92 204 204 / 15%);

  /* TREF component vars (light) */
  --tref-menu-bg: #fff;
  --tref-menu-text: #374151;
  --tref-menu-hover: #f3f4f6;
  --tref-menu-shadow: 0 4px 12px rgb(0 0 0 / 15%);
  --tref-receiver-bg: #f9fafb;
  --tref-receiver-text: #6b7280;
  --tref-receiver-active-bg: #f3e8ff;
  --tref-receiver-success-bg: #ecfdf5;
  --tref-receiver-error-bg: #fef2f2;
  --tref-receiver-block-bg: #fff;
}

/* Dark mode overrides */
html.dark {
  --site-bg: #0f172a;
  --site-text: #e2e8f0;
  --site-text-muted: #94a3b8;
  --site-card-bg: #1e293b;
  --site-card-shadow: 0 4px 12px rgb(0 0 0 / 30%);
  --site-section-alt: #1e293b;
  --site-highlight-bg: rgb(92 204 204 / 10%);
  --gray-100: #1e293b;
  --gray-200: #334155;

  /* TREF component vars (dark) */
  --tref-menu-bg: #1f2937;
  --tref-menu-text: #e5e7eb;
  --tref-menu-hover: #374151;
  --tref-menu-shadow: 0 4px 12px rgb(0 0 0 / 40%);
  --tref-receiver-bg: #1f2937;
  --tref-receiver-text: #9ca3af;
  --tref-receiver-active-bg: #3b2d5e;
  --tref-receiver-success-bg: #064e3b;
  --tref-receiver-error-bg: #450a0a;
  --tref-receiver-block-bg: #111827;
}

/* ==========================================================================
   2. BASE RESET
   ========================================================================== */

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: Inter, system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  color: var(--site-text);
  background: var(--site-bg);
  transition: background 0.3s, color 0.3s;
}

/* ==========================================================================
   3. LAYOUT
   ========================================================================== */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 4rem 0;
}

.section-alt {
  background: var(--site-section-alt);
}

.section-title {
  font-size: 2rem;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--site-text);
}

/* ==========================================================================
   4. NAVIGATION
   ========================================================================== */

.nav {
  background: var(--dark-purple);
  padding: 1rem 2rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 10px rgb(0 0 0 / 20%);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: white;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.25rem;
}

.nav-brand svg {
  width: 32px;
  height: 32px;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--gray-300);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--mint);
}

/* Navigation icons */
.nav-icon {
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-icon svg {
  width: 20px;
  height: 20px;
}

/* Labels visible on desktop */
.nav-label {
  display: inline;
}

/* Tooltip for mobile - uses title attribute */
.nav-links a[title] {
  position: relative;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.theme-toggle {
  background: transparent;
  border: 1px solid rgb(255 255 255 / 20%);
  border-radius: 8px;
  padding: 6px 12px;
  cursor: pointer;
  font-size: 14px;
  color: var(--gray-300);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}

.theme-toggle:hover {
  border-color: var(--mint);
  color: var(--mint);
}

/* ==========================================================================
   5. HERO
   ========================================================================== */

.hero {
  background: linear-gradient(135deg, var(--dark-purple) 0%, #4C1D95 100%);
  color: white;
  padding: 4rem 2rem;
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--purple) 0%, var(--mint) 100%);
  /* stylelint-disable-next-line property-no-vendor-prefix */
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-eyebrow {
  color: var(--teal-400);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--gray-300);
  max-width: 600px;
  margin: 0 auto 2rem;
}

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

/* ==========================================================================
   6. BOX PATTERN - All containers with bg/radius/padding/shadow
   ========================================================================== */

.card,
.explainer,
.builder-form,
.result-preview,
.comparison-box,
.article-tref-card,
.chat-box {
  background: var(--site-card-bg);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: var(--site-card-shadow);
  transition: background 0.3s;
}

/* Card hover effect */
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgb(0 0 0 / 10%);
}

/* Box with highlight border */
.analogy,
.article-tref-card {
  border-left: 4px solid var(--mint);
}

.analogy {
  background: var(--site-highlight-bg);
  border-radius: 0 8px 8px 0;
  padding: 1rem;
  margin: 1rem 0;
}

/* Comparison box uses gray bg */
.comparison-box {
  background: var(--gray-100);
  padding: 1.5rem;
  border-radius: 8px;
}

/* Chat box specific */
.chat-box {
  padding: 0;
  border: 1px solid var(--gray-200);
  overflow: hidden;
  background: var(--gray-100);
}

/* ==========================================================================
   7. BOX CONTENT - Headings and text inside boxes
   ========================================================================== */

.card h3,
.explainer h2,
.comparison-box h4 {
  color: var(--site-text);
  margin-bottom: 1rem;
}

.explainer h2 {
  color: var(--purple);
}

.card p,
.explainer p,
.analogy p,
.step-content p,
.feature p,
.article-tref-content p {
  color: var(--site-text-muted);
  font-size: 0.95rem;
}

.analogy-title {
  font-weight: 600;
  color: var(--purple);
  margin-bottom: 0.5rem;
}

/* Spacing */
.explainer {
  margin-bottom: 2rem;
}

/* ==========================================================================
   8. BADGE PATTERN - Icon circles/squares
   ========================================================================== */

.card-icon,
.list-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: white;
  flex-shrink: 0;
}

.card-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--purple), var(--mint));
  border-radius: 12px;
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

.list-icon {
  width: 28px;
  height: 28px;
  background: var(--purple);
  font-size: 0.8rem;
}

/* Step numbers (auto-generated) */
.steps {
  counter-reset: step;
}

.step {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.step::before {
  counter-increment: step;
  content: counter(step);
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--purple), var(--mint));
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.step-content h4 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: var(--site-text);
}

/* ==========================================================================
   9. GRID PATTERN - All grid layouts
   ========================================================================== */

.card-grid,
.feature-grid,
.comparison,
.form-row {
  display: grid;
  gap: 2rem;
}

.card-grid {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.feature-grid {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.comparison {
  grid-template-columns: 1fr 1fr;
  margin: 2rem 0;
}

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

@media (width <= 600px) {
  .comparison,
  .form-row {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   10. LIST PATTERN
   ========================================================================== */

.simple-list {
  list-style: none;
  padding: 0;
}

.simple-list li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  color: var(--site-text);
}

.simple-list li:last-child {
  border-bottom: none;
}

/* Feature list */
.feature {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.feature-icon {
  width: 24px;
  height: 24px;
  color: var(--mint);
  flex-shrink: 0;
}

.feature h4 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

/* ==========================================================================
   11. BUTTONS
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--purple), var(--mint));
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgb(139 92 246 / 40%);
}

.btn-secondary {
  background: rgb(255 255 255 / 10%);
  color: white;
  border: 1px solid rgb(255 255 255 / 20%);
}

.btn-secondary:hover {
  background: rgb(255 255 255 / 20%);
}

.btn-build {
  width: 100%;
  padding: 1rem;
  font-size: 1.1rem;
}

/* ==========================================================================
   12. CODE BLOCKS
   ========================================================================== */

.code-block,
.embed-code {
  background: var(--gray-900);
  color: var(--gray-100);
  border-radius: 8px;
  padding: 1rem 1.5rem;
  font-family: 'Fira Code', Consolas, monospace;
  font-size: 0.9rem;
  overflow-x: auto;
}

.code-block {
  position: relative;
}

.code-block code {
  color: var(--mint);
}

.embed-code {
  color: var(--mint);
  font-size: 0.85rem;
  white-space: pre-wrap;
  word-break: break-all;
}

.code-block-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.code-block-label {
  color: var(--gray-400);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Copy buttons */
.copy-btn,
.btn-copy-code {
  background: var(--gray-700);
  color: var(--gray-300);
  border: none;
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-copy-code {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  border: 1px solid var(--gray-600);
}

.copy-btn:hover,
.btn-copy-code:hover {
  background: var(--gray-600);
  color: white;
}

.copy-btn.copied,
.btn-copy-code.copied {
  background: var(--mint);
  color: var(--dark-purple);
}

/* ==========================================================================
   13. FORMS
   ========================================================================== */

.builder-container {
  max-width: 800px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--site-text);
}

.form-group small {
  display: block;
  color: var(--gray-500);
  font-size: 0.85rem;
  margin-top: 0.25rem;
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  background: var(--site-card-bg);
  color: var(--site-text);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus {
  outline: none;
  border-color: var(--purple);
  box-shadow: 0 0 0 3px rgb(139 92 246 / 10%);
}

textarea.form-input {
  min-height: 150px;
  resize: vertical;
}

/* ==========================================================================
   14. RESULT/PREVIEW SECTION
   ========================================================================== */

.result-section {
  margin-top: 2rem;
  display: none;
}

.result-section.visible {
  display: block;
}

.result-preview {
  margin-bottom: 1.5rem;
}

.result-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Step indicator dots */
.step-indicator {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.step-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gray-300);
  transition: background 0.3s;
}

.step-dot.active {
  background: var(--purple);
}

.step-dot.done {
  background: var(--mint);
}

/* ==========================================================================
   15. ARTICLE TREF CARD
   ========================================================================== */

.article-tref-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
}

.article-tref-card .tref-wrapper {
  flex-shrink: 0;
}

.article-tref-content {
  flex: 1;
}

.article-tref-content h4 {
  margin: 0 0 4px;
  color: var(--site-text);
  font-size: 1rem;
}

.article-tref-hint {
  font-size: 0.75rem;
  color: var(--gray-400);
  margin-top: 8px;
}

/* ==========================================================================
   16. CHAT DEMO (examples/ai-chat.html)
   ========================================================================== */

.chat-messages {
  height: 250px;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.chat-msg {
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  max-width: 85%;
  font-size: 0.9rem;
  overflow-wrap: break-word;
}

.chat-msg.ai {
  background: var(--site-card-bg);
  align-self: flex-start;
}

.chat-msg.user {
  background: var(--purple);
  color: white;
  align-self: flex-end;
}

.chat-msg.tref-context {
  background: var(--site-highlight-bg);
  border: 1px solid var(--mint);
  align-self: flex-end;
  font-size: 0.8rem;
  color: var(--site-text-muted);
}

.chat-tref-row {
  display: flex;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgb(92 204 204 / 10%);
  border-top: 1px solid var(--gray-200);
  align-items: center;
}

.chat-input-row {
  display: flex;
  border-top: 1px solid var(--gray-200);
}

.chat-input {
  flex: 1;
  border: none;
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  outline: none;
  background: var(--site-card-bg);
  color: var(--site-text);
}

.chat-send {
  background: var(--purple);
  color: white;
  border: none;
  padding: 0.75rem 1rem;
  cursor: pointer;
  font-weight: 600;
}

.chat-send:hover {
  background: #7c3aed;
}

.add-slot-btn {
  width: 40px;
  height: 40px;
  border: 2px dashed var(--gray-300);
  border-radius: 8px;
  background: transparent;
  color: var(--gray-400);
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.add-slot-btn:hover {
  border-color: var(--mint);
  color: var(--mint);
}

/* ==========================================================================
   17. MINI RECEIVER (compact TREF receiver)
   ========================================================================== */

.mini-receiver.tref-receiver {
  width: 48px !important;
  height: 48px !important;
  min-height: 48px !important;
  max-height: 48px !important;
  padding: 0 !important;
  border-radius: 8px;
  aspect-ratio: 1;
}

.mini-receiver.tref-receiver-has-block {
  padding: 0;
}

.mini-receiver .tref-wrapper {
  max-width: 48px;
  padding: 0;
  background: transparent;
  border: none;
}

.mini-receiver .tref-header {
  margin: 0;
}

.mini-receiver .tref-icon {
  width: 32px;
  height: 32px;
}

.mini-receiver .tref-icon svg {
  width: 100%;
  height: 100%;
}

.mini-receiver .tref-id,
.mini-receiver .tref-meta,
.mini-receiver .tref-menu,
.mini-receiver .tref-content,
.mini-receiver .tref-refs {
  display: none;
}

/* Receiver row for drag-drop demo */
.receiver-row {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 2rem;
}

.received-blocks {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* ==========================================================================
   18. FOOTER
   ========================================================================== */

.footer {
  background: var(--gray-900);
  color: var(--gray-400);
  padding: 3rem 2rem;
  text-align: center;
}

/* stylelint-disable-next-line no-descending-specificity */
.footer a {
  color: var(--mint);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

/* ==========================================================================
   19. RESPONSIVE
   ========================================================================== */

@media (width <= 768px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

  /* Mobile: icon-only navigation */
  .nav-links {
    gap: 0.75rem;
  }

  .nav-label {
    display: none;
  }

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

  .section {
    padding: 2rem 0;
  }
}

/* ==========================================================================
   20. UTILITIES
   ========================================================================== */

.text-center { text-align: center; }
.text-muted { color: var(--site-text-muted); }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.max-w-sm { max-width: 500px; }
.max-w-md { max-width: 800px; }
.max-w-lg { max-width: 900px; }

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}