/* ============================================================
   Sans Language — CSS Design System
   Catppuccin Latte (light) / Mocha (dark)
   ============================================================ */

/* 1. FONTS
   ------------------------------------------------------------ */
@font-face {
  font-family: 'Source Sans 3';
  src: url('/fonts/SourceSans3.woff2') format('woff2');
  font-weight: 400 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Source Code Pro';
  src: url('/fonts/SourceCodePro.woff2') format('woff2');
  font-weight: 400 600;
  font-style: normal;
  font-display: swap;
}

/* 2. CATPPUCCIN LATTE — LIGHT MODE (default)
   ------------------------------------------------------------ */
:root {
  --base:     #eff1f5;
  --mantle:   #e6e9ef;
  --crust:    #dce0e8;
  --surface0: #ccd0da;
  --surface1: #bcc0cc;
  --text:     #4c4f69;
  --subtext1: #5c5f77;
  --subtext0: #6c6f85;
  --overlay0: #9ca0b0;
  --mauve:    #8839ef;
  --lavender: #7287fd;
  --green:    #40a02b;
  --peach:    #fe640b;
  --yellow:   #df8e1d;
  --red:      #d20f39;
  --on-accent: #ffffff;
}

/* 3. CATPPUCCIN MOCHA — DARK MODE
   ------------------------------------------------------------ */
[data-theme="dark"] {
  --base:     #1e1e2e;
  --mantle:   #181825;
  --crust:    #11111b;
  --surface0: #313244;
  --surface1: #45475a;
  --text:     #cdd6f4;
  --subtext1: #bac2de;
  --subtext0: #a6adc8;
  --overlay0: #6c7086;
  --mauve:    #cba6f7;
  --lavender: #b4befe;
  --green:    #a6e3a1;
  --peach:    #fab387;
  --yellow:   #f9e2af;
  --red:      #f38ba8;
  --on-accent: #1e1e2e;
}

/* No-JS dark mode fallback via OS preference */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --base:     #1e1e2e;
    --mantle:   #181825;
    --crust:    #11111b;
    --surface0: #313244;
    --surface1: #45475a;
    --text:     #cdd6f4;
    --subtext1: #bac2de;
    --subtext0: #a6adc8;
    --overlay0: #6c7086;
    --mauve:    #cba6f7;
    --lavender: #b4befe;
    --green:    #a6e3a1;
    --peach:    #fab387;
    --yellow:   #f9e2af;
    --red:      #f38ba8;
    --on-accent: #1e1e2e;
  }
}

/* 4. RESET + BASE
   ------------------------------------------------------------ */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Source Sans 3', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  background-color: var(--base);
  color: var(--text);
}

a {
  color: var(--lavender);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* 5. LAYOUT
   ------------------------------------------------------------ */
.container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 32px;
}

/* 6. HERO
   ------------------------------------------------------------ */
.hero {
  padding: 80px 32px;
  text-align: center;
}

@media (max-width: 768px) {
  .hero {
    padding: 64px 32px;
  }
}

.hero h1 {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.15;
}

.tagline {
  font-size: 22px;
  color: var(--subtext0);
  margin-top: 12px;
}

.subtitle {
  font-size: 16px;
  color: var(--overlay0);
  margin-top: 8px;
}

.hero-cta {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-top: 32px;
}

.hero-version {
  font-size: 13px;
  color: var(--overlay0);
  margin-top: 12px;
}

/* 7. BUTTONS
   ------------------------------------------------------------ */
.btn-primary,
.btn-secondary {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: opacity 0.15s ease, background-color 0.15s ease;
}

.btn-primary {
  background-color: var(--mauve);
  color: var(--on-accent);
}

.btn-primary:hover {
  opacity: 0.9;
  text-decoration: none;
}

.btn-secondary {
  background-color: var(--surface0);
  color: var(--text);
}

.btn-secondary:hover {
  background-color: var(--surface1);
  text-decoration: none;
}

/* 8. FEATURE CARDS
   ------------------------------------------------------------ */
.features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  padding: 48px 0;
}

.feature-card {
  background-color: var(--mantle);
  border: 1px solid var(--surface0);
  border-radius: 12px;
  padding: 24px 28px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 15px;
  color: var(--subtext0);
}

/* 9. CODE + SYNTAX HIGHLIGHTING
   ------------------------------------------------------------ */
pre {
  background-color: var(--mantle);
  border-radius: 8px;
  padding: 20px 24px;
  overflow-x: auto;
  font-family: 'Source Code Pro', 'Fira Code', monospace;
  font-size: 14px;
  line-height: 1.5;
}

code {
  font-family: 'Source Code Pro', 'Fira Code', monospace;
}

p code,
li code,
td code {
  background-color: var(--mantle);
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 13px;
}

/* Syntax token classes */
.kw      { color: var(--mauve); }
.fn      { color: var(--lavender); }
.str     { color: var(--green); }
.num     { color: var(--peach); }
.type    { color: var(--yellow); }
.comment { color: var(--overlay0); font-style: italic; }

/* 10. TABLES
   ------------------------------------------------------------ */
table {
  width: 100%;
  border-collapse: collapse;
  display: block;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

thead th {
  color: var(--mauve);
  font-weight: 600;
  border-bottom: 2px solid var(--surface0);
  padding: 10px 14px;
  text-align: left;
}

tbody tr:nth-child(odd) {
  background-color: var(--mantle);
}

tbody tr:nth-child(even) {
  background-color: var(--base);
}

td,
th {
  padding: 10px 14px;
}

td.highlight {
  color: var(--mauve);
  font-weight: 700;
}

/* 11. DOCS LAYOUT
   ------------------------------------------------------------ */
.docs {
  padding-top: 32px;
  padding-bottom: 32px;
}

.docs h1 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 24px;
}

.docs h2 {
  font-size: 24px;
  font-weight: 700;
  margin-top: 40px;
  margin-bottom: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--surface0);
}

.docs h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--subtext1);
  margin-top: 28px;
  margin-bottom: 12px;
}

.docs-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 32px;
}

.docs {
  min-width: 0;
  max-width: 100%;
}

.docs pre, .docs table {
  max-width: 100%;
  overflow-x: auto;
}

.toc-toggle {
  display: none;
}

.toc {
  position: sticky;
  top: 72px;
  background-color: var(--mantle);
  border-radius: 8px;
  padding: 20px;
  max-height: calc(100vh - 88px);
  overflow-y: auto;
  align-self: start;
}

.toc h3 {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--subtext0);
  margin-bottom: 12px;
}

.toc a {
  display: block;
  font-size: 13px;
  color: var(--subtext1);
  padding: 4px 0;
  text-decoration: none;
  transition: color 0.1s ease;
}

.toc a:hover {
  color: var(--lavender);
  text-decoration: none;
}

.toc ul {
  list-style: none;
}

/* 12. COMPARISON TABS
   ------------------------------------------------------------ */
.comparison {
  padding: 48px 0;
  border-top: 1px solid var(--surface0);
}

.example-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--subtext0);
  margin-bottom: 8px;
}

.tabs {
  margin-bottom: 32px;
}

/* Hide radio inputs but keep them functional */
.comparison input[type="radio"] {
  display: none;
}

.tab-bar {
  display: flex;
  border-bottom: 2px solid var(--surface0);
  margin-bottom: 24px;
  gap: 0;
}

.tab-label {
  font-size: 14px;
  font-weight: 600;
  padding: 10px 20px;
  cursor: pointer;
  color: var(--subtext0);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: color 0.15s ease, border-color 0.15s ease;
  user-select: none;
}

.tab-label:hover {
  color: var(--text);
}

.token-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 10px;
  background-color: var(--crust);
  color: var(--overlay0);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.tab-panels > .tab-panel {
  display: none;
}

/* Tab activation — uses :nth-of-type on radio inputs to match panels by position */
.tabs > input:nth-of-type(1):checked ~ .tab-bar > label:nth-child(1),
.tabs > input:nth-of-type(2):checked ~ .tab-bar > label:nth-child(2),
.tabs > input:nth-of-type(3):checked ~ .tab-bar > label:nth-child(3),
.tabs > input:nth-of-type(4):checked ~ .tab-bar > label:nth-child(4),
.tabs > input:nth-of-type(5):checked ~ .tab-bar > label:nth-child(5) {
  color: var(--mauve);
  border-bottom-color: var(--mauve);
}

.tabs > input:nth-of-type(1):checked ~ .tab-bar > label:nth-child(1) .token-badge,
.tabs > input:nth-of-type(2):checked ~ .tab-bar > label:nth-child(2) .token-badge,
.tabs > input:nth-of-type(3):checked ~ .tab-bar > label:nth-child(3) .token-badge,
.tabs > input:nth-of-type(4):checked ~ .tab-bar > label:nth-child(4) .token-badge,
.tabs > input:nth-of-type(5):checked ~ .tab-bar > label:nth-child(5) .token-badge {
  background-color: var(--mauve);
  color: var(--on-accent);
}

.tabs > input:nth-of-type(1):checked ~ .tab-panels > .tab-panel:nth-child(1),
.tabs > input:nth-of-type(2):checked ~ .tab-panels > .tab-panel:nth-child(2),
.tabs > input:nth-of-type(3):checked ~ .tab-panels > .tab-panel:nth-child(3),
.tabs > input:nth-of-type(4):checked ~ .tab-panels > .tab-panel:nth-child(4),
.tabs > input:nth-of-type(5):checked ~ .tab-panels > .tab-panel:nth-child(5) {
  display: block;
}

/* 13. INSTALL BLOCK
   ------------------------------------------------------------ */
.install-block {
  position: relative;
  background-color: var(--mantle);
  border-radius: 8px;
  padding: 16px 20px;
  font-family: 'Source Code Pro', 'Fira Code', monospace;
  font-size: 14px;
  white-space: nowrap;
  overflow-x: auto;
}

.copy-btn {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background-color: var(--surface0);
  color: var(--text);
  border: none;
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.copy-btn:hover {
  background-color: var(--surface1);
}

/* 14. FOOTER
   ------------------------------------------------------------ */
footer {
  border-top: 1px solid var(--surface0);
  padding: 32px;
  text-align: center;
  font-size: 14px;
  color: var(--subtext0);
}

footer a {
  color: var(--lavender);
}

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

/* 15. RESPONSIVE
   ------------------------------------------------------------ */

/* Tables: horizontal scroll on overflow */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

@media (max-width: 1024px) {
  .docs-layout {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
    max-height: none;
    margin-top: 0;
    margin-bottom: 24px;
    background: none;
    border: none;
    padding: 0;
  }

  /* Collapsible TOC on tablet/mobile */
  .toc-toggle {
    display: block;
    width: 100%;
    background: var(--mantle);
    border: 1px solid var(--surface0);
    border-radius: 8px;
    padding: 12px 20px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    text-align: left;
  }

  .toc-toggle:hover {
    background: var(--crust);
  }

  .toc-content {
    display: none;
    background: var(--mantle);
    border: 1px solid var(--surface0);
    border-radius: 8px;
    padding: 16px 20px;
    margin-top: 8px;
  }

  .toc-content.open {
    display: block;
  }

  .toc-content h3 {
    display: none;
  }
}

@media (max-width: 768px) {
  .container, .container-wide { padding: 0 16px; }
  .docs-layout { padding: 0 16px; gap: 16px; }
  body { overflow-x: hidden; }

  .hero { padding: 48px 0 40px; }
  .hero h1 { font-size: 28px; }
  .tagline { font-size: 16px; }
  .subtitle { font-size: 14px; }

  .hero-cta {
    flex-direction: column;
    align-items: center;
    gap: 10px;
  }

  .features { grid-template-columns: 1fr; gap: 12px; padding: 32px 0; }
  .feature-card { padding: 20px; }
  .feature-card h3 { font-size: 16px; }
  .feature-card p { font-size: 14px; }

  .comparison { padding-top: 32px; padding-bottom: 32px; }

  .tab-bar { flex-wrap: wrap; gap: 4px; }
  .tab-label { font-size: 12px; padding: 6px 8px; gap: 3px; }
  .token-badge { font-size: 9px; padding: 1px 5px; }

  .token-summary table { font-size: 12px; }
  table { font-size: 13px; }
  thead th { padding: 8px 10px; }
  tbody td { padding: 6px 10px; }

  pre { font-size: 12px; padding: 12px 14px; }
  p code, li code, td code { font-size: 12px; }

  .docs h1 { font-size: 24px; }
  .docs h2 { font-size: 20px; margin-top: 32px; }
  .docs h3 { font-size: 16px; }

  .install-block { padding: 12px 48px 12px 14px; font-size: 12px; }

  .docs ul { padding-left: 20px; }
  .docs table { font-size: 13px; }

  footer { padding: 24px 16px; }
}