/* ==========================================================================
   SabaiBook Documentation Design System
   Philosophy: Thai editorial documentation — calm, scannable, reference-grade
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans+Thai:wght@400;500;600;700&family=Sarabun:wght@300;400;500;600&family=Fraunces:opsz,wght@9..144,400;9..144,600;9..144,700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* Colors — Thai sage palette */
  --ink: #1A1F1A;
  --ink-soft: #3A423A;
  --ink-muted: #6B716B;
  --ink-faint: #9AA09A;
  --paper: #FAF8F3;
  --paper-warm: #F4EFE5;
  --paper-line: #E8E2D5;

  --sage: #5A7A5B;
  --sage-deep: #3E5640;
  --sage-soft: #E8EEE6;
  --sage-faint: #F2F5EF;

  --terracotta: #C2624A;
  --terracotta-soft: #F7E8E2;
  --amber: #D4A84B;
  --amber-soft: #F9F1DC;

  /* Typography */
  --font-display: 'Fraunces', 'IBM Plex Sans Thai', serif;
  --font-thai: 'IBM Plex Sans Thai', 'Sarabun', sans-serif;
  --font-body: 'Sarabun', 'IBM Plex Sans Thai', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing */
  --sidebar-w: 280px;
  --content-w: 680px;
  --radius: 4px;
  --radius-lg: 8px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-thai);
  font-weight: 400;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ==========================================================================
   Layout — Docs shell with sidebar
   ========================================================================== */

.docs-shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height: 100vh;
}

.docs-sidebar {
  background: var(--paper-warm);
  border-right: 1px solid var(--paper-line);
  padding: 32px 24px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.docs-main {
  padding: 64px 48px 120px;
  max-width: calc(var(--content-w) + 96px);
  margin: 0 auto;
  width: 100%;
}

/* Sidebar */
.sidebar-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  color: var(--sage-deep);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
  letter-spacing: -0.02em;
}

.sidebar-tagline {
  font-size: 12px;
  color: var(--ink-muted);
  margin-bottom: 32px;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.sidebar-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--ink-muted);
  text-decoration: none;
  margin-bottom: 24px;
  padding: 6px 0;
  transition: color 0.15s;
}
.sidebar-back:hover { color: var(--sage); }

.sidebar-group { margin-bottom: 28px; }

.sidebar-group-title {
  font-size: 11px;
  font-weight: 700;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
  padding: 0 10px;
}

.sidebar-link {
  display: block;
  padding: 7px 10px;
  font-size: 14px;
  color: var(--ink-soft);
  text-decoration: none;
  border-radius: var(--radius);
  transition: all 0.12s;
  line-height: 1.5;
}
.sidebar-link:hover {
  background: var(--sage-faint);
  color: var(--sage-deep);
}
.sidebar-link.active {
  background: var(--sage-soft);
  color: var(--sage-deep);
  font-weight: 600;
}

/* ==========================================================================
   Typography
   ========================================================================== */

.page-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--sage);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 500;
  margin-bottom: 12px;
}

.page-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 48px;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin-bottom: 20px;
}

.page-lede {
  font-size: 18px;
  line-height: 1.65;
  color: var(--ink-soft);
  margin-bottom: 48px;
  max-width: 600px;
}

h2 {
  font-family: var(--font-thai);
  font-weight: 600;
  font-size: 28px;
  line-height: 1.25;
  color: var(--ink);
  margin: 64px 0 16px;
  letter-spacing: -0.01em;
}
h2:first-child { margin-top: 0; }

h2::before {
  content: "";
  display: block;
  width: 32px;
  height: 2px;
  background: var(--sage);
  margin-bottom: 16px;
}

h3 {
  font-family: var(--font-thai);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.35;
  color: var(--ink);
  margin: 36px 0 12px;
}

h4 {
  font-family: var(--font-thai);
  font-weight: 600;
  font-size: 16px;
  color: var(--ink);
  margin: 24px 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

p {
  margin-bottom: 16px;
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.75;
}

a {
  color: var(--sage-deep);
  text-decoration: underline;
  text-decoration-color: var(--paper-line);
  text-underline-offset: 3px;
  transition: text-decoration-color 0.15s;
}
a:hover { text-decoration-color: var(--sage); }

ul, ol {
  margin: 0 0 20px 0;
  padding-left: 24px;
  color: var(--ink-soft);
}
li { margin-bottom: 8px; line-height: 1.7; }

strong { color: var(--ink); font-weight: 600; }

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--paper-warm);
  padding: 2px 6px;
  border-radius: 3px;
  color: var(--sage-deep);
  border: 1px solid var(--paper-line);
}

pre {
  background: var(--ink);
  color: var(--paper);
  padding: 20px 24px;
  border-radius: var(--radius-lg);
  overflow-x: auto;
  margin: 16px 0 24px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
}
pre code {
  background: transparent;
  border: none;
  color: inherit;
  padding: 0;
}

/* ==========================================================================
   Callouts
   ========================================================================== */

.callout {
  border-left: 3px solid var(--sage);
  background: var(--sage-faint);
  padding: 16px 20px;
  margin: 20px 0 24px;
  border-radius: 0 var(--radius) var(--radius) 0;
}
.callout-title {
  font-weight: 600;
  color: var(--sage-deep);
  font-size: 14px;
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.callout p:last-child { margin-bottom: 0; }

.callout.warn {
  border-color: var(--terracotta);
  background: var(--terracotta-soft);
}
.callout.warn .callout-title { color: var(--terracotta); }

.callout.tip {
  border-color: var(--amber);
  background: var(--amber-soft);
}
.callout.tip .callout-title { color: #8A6B1C; }

/* ==========================================================================
   Steps (numbered)
   ========================================================================== */

.steps { margin: 32px 0; border-left: 1px solid var(--paper-line); padding-left: 0; list-style: none; }
.step {
  position: relative;
  padding: 0 0 36px 60px;
  margin-left: 0;
}
.step::before {
  content: counter(step);
  counter-increment: step;
  position: absolute;
  left: -18px;
  top: -4px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--paper);
  border: 1.5px solid var(--sage);
  color: var(--sage-deep);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  display: grid;
  place-items: center;
}
.steps { counter-reset: step; }
.step-title {
  font-family: var(--font-thai);
  font-weight: 600;
  font-size: 18px;
  color: var(--ink);
  margin-bottom: 8px;
  line-height: 1.4;
}
.step-body p { margin-bottom: 10px; }
.step-body p:last-child { margin-bottom: 0; }

/* ==========================================================================
   Cards / Grid
   ========================================================================== */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
  margin: 24px 0 32px;
}

.card {
  background: var(--paper);
  border: 1px solid var(--paper-line);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-decoration: none;
  color: inherit;
  transition: all 0.15s;
  display: block;
}
.card:hover {
  border-color: var(--sage);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px -12px rgba(58, 90, 60, 0.15);
}

.card-icon {
  width: 32px;
  height: 32px;
  margin-bottom: 12px;
  color: var(--sage);
}

.card-title {
  font-family: var(--font-thai);
  font-weight: 600;
  font-size: 16px;
  color: var(--ink);
  margin-bottom: 6px;
  line-height: 1.35;
}

.card-desc {
  font-size: 13px;
  color: var(--ink-muted);
  line-height: 1.55;
  margin: 0;
}

/* Hero card (featured) */
.card-hero {
  grid-column: span 2;
  background: var(--sage-deep);
  color: var(--paper);
  border-color: var(--sage-deep);
}
.card-hero .card-title { color: var(--paper); font-size: 20px; }
.card-hero .card-desc { color: rgba(250, 248, 243, 0.75); }
.card-hero .card-icon { color: var(--paper); }
.card-hero:hover { background: var(--ink); border-color: var(--ink); }

@media (max-width: 700px) {
  .card-hero { grid-column: span 1; }
}

/* ==========================================================================
   Table
   ========================================================================== */

table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0 28px;
  font-size: 15px;
}
th {
  text-align: left;
  padding: 12px 16px;
  background: var(--paper-warm);
  border-bottom: 2px solid var(--paper-line);
  font-weight: 600;
  color: var(--ink);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--paper-line);
  color: var(--ink-soft);
  vertical-align: top;
}
tr:last-child td { border-bottom: none; }

/* ==========================================================================
   Search bar (hub only)
   ========================================================================== */

.docs-search {
  position: relative;
  margin: 0 0 48px;
}
.docs-search input {
  width: 100%;
  padding: 16px 20px 16px 52px;
  border: 1px solid var(--paper-line);
  border-radius: var(--radius-lg);
  background: var(--paper);
  font-family: var(--font-thai);
  font-size: 15px;
  color: var(--ink);
  transition: all 0.15s;
}
.docs-search input:focus {
  outline: none;
  border-color: var(--sage);
  box-shadow: 0 0 0 3px var(--sage-faint);
}
.docs-search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  color: var(--ink-faint);
  pointer-events: none;
}

/* ==========================================================================
   Breadcrumbs
   ========================================================================== */

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-muted);
  margin-bottom: 24px;
  font-family: var(--font-mono);
}
.breadcrumbs a { color: var(--ink-muted); text-decoration: none; }
.breadcrumbs a:hover { color: var(--sage-deep); }
.breadcrumbs .sep { color: var(--paper-line); }

/* ==========================================================================
   Prev/Next navigation
   ========================================================================== */

.page-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 80px;
  padding-top: 40px;
  border-top: 1px solid var(--paper-line);
}
.page-nav-card {
  display: block;
  padding: 20px 24px;
  border: 1px solid var(--paper-line);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all 0.15s;
}
.page-nav-card:hover {
  border-color: var(--sage);
  background: var(--sage-faint);
}
.page-nav-card.next { text-align: right; }
.page-nav-label {
  font-size: 12px;
  color: var(--ink-muted);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}
.page-nav-title {
  font-family: var(--font-thai);
  font-weight: 600;
  color: var(--ink);
  font-size: 16px;
}

/* ==========================================================================
   Button
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  background: var(--sage-deep);
  color: var(--paper);
  font-family: var(--font-thai);
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.15s;
}
.btn:hover {
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
}
.btn-ghost {
  background: transparent;
  color: var(--sage-deep);
  border: 1px solid var(--sage);
}
.btn-ghost:hover {
  background: var(--sage-faint);
  color: var(--sage-deep);
}

/* ==========================================================================
   Status badges
   ========================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 500;
  font-family: var(--font-mono);
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.badge-ok { background: var(--sage-soft); color: var(--sage-deep); }
.badge-warn { background: var(--terracotta-soft); color: var(--terracotta); }
.badge-new { background: var(--amber-soft); color: #8A6B1C; }
.badge-ghost { background: var(--paper-warm); color: var(--ink-muted); }

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
}

/* ==========================================================================
   Mobile hamburger & responsive
   ========================================================================== */

.mobile-toggle {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 100;
  background: var(--paper);
  border: 1px solid var(--paper-line);
  padding: 10px;
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--ink);
}

@media (max-width: 900px) {
  .docs-shell { grid-template-columns: 1fr; }
  .docs-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    transform: translateX(-100%);
    z-index: 90;
    transition: transform 0.25s;
    width: 280px;
    box-shadow: 0 0 30px rgba(0,0,0,0.1);
  }
  .docs-sidebar.open { transform: translateX(0); }
  .docs-main { padding: 72px 24px 80px; }
  .page-title { font-size: 34px; }
  .mobile-toggle { display: block; }
  .page-nav { grid-template-columns: 1fr; }
  h2 { font-size: 22px; margin-top: 48px; }
  .step { padding-left: 48px; padding-bottom: 28px; }
  .step::before { width: 30px; height: 30px; left: -15px; font-size: 13px; }
}

/* ==========================================================================
   Footer
   ========================================================================== */

.docs-footer {
  margin-top: 80px;
  padding-top: 32px;
  border-top: 1px solid var(--paper-line);
  font-size: 13px;
  color: var(--ink-muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.docs-footer a { color: var(--ink-muted); text-decoration: none; }
.docs-footer a:hover { color: var(--sage-deep); }

/* Decorative flourish */
.flourish {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--sage);
  font-size: 20px;
  margin: 0 8px;
}