/*
 * Heda User Guide — shared styles
 * Brand: Sage Calm (dark default, light via prefers-color-scheme)
 * Fonts: Newsreader (serif), Inter Tight (sans), JetBrains Mono (mono)
 */

@import url('https://fonts.googleapis.com/css2?family=Newsreader:ital,opsz,wght@0,6..72,300..700;1,6..72,300..700&family=Inter+Tight:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Colour tokens ─────────────────────────────────────────────── */
:root {
  --bg:          #0f1311;
  --bg-raised:   #171c19;
  --bg-card:     #1c211e;
  --line:        rgba(220,225,210,0.08);
  --line-strong: rgba(220,225,210,0.14);
  --text:        #e8eae3;
  --text-mute:   #9aa097;
  --text-dim:    #5e655d;
  --accent:      #a8b89a;
  --accent-soft: #3d4a36;
  --accent-ink:  #0f1311;
  --warm:        #d8c4a0;
  --danger:      #c89595;
  --serif:       'Newsreader', Georgia, serif;
  --sans:        'Inter Tight', 'Inter', system-ui, sans-serif;
  --mono:        'JetBrains Mono', ui-monospace, monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg:          #f3f1ea;
    --bg-raised:   #ebe9e1;
    --bg-card:     #ffffff;
    --line:        rgba(40,50,35,0.10);
    --line-strong: rgba(40,50,35,0.18);
    --text:        #1c211e;
    --text-mute:   #5e6559;
    --text-dim:    #9aa097;
    --accent:      #5a6f4d;
    --accent-soft: #cfd8c2;
    --accent-ink:  #f3f1ea;
    --warm:        #b08c4e;
    --danger:      #a85a5a;
  }
}

/* ── Reset & base ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Site header ───────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
  padding: 14px 24px;
}

.site-header-inner {
  max-width: 1160px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 9px;
  text-decoration: none;
  color: var(--text);
  flex-shrink: 0;
}

.brand-lockup .wordmark {
  font-family: var(--sans);
  font-weight: 500;
  font-size: 18px;
  letter-spacing: -0.03em;
  color: var(--text);
}

.header-meta {
  display: flex;
  flex-direction: column;
}

.header-subtitle {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-dim);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-nav a {
  font-size: 13px;
  color: var(--text-mute);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: 6px;
  transition: background 0.15s, color 0.15s;
}

.header-nav a:hover { background: var(--bg-card); color: var(--text); }

.lang-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.5px;
  color: var(--accent);
  text-decoration: none;
  border: 1px solid var(--line-strong);
  padding: 5px 10px;
  border-radius: 6px;
  transition: background 0.15s, border-color 0.15s;
}

.lang-btn:hover { background: var(--bg-card); border-color: var(--accent); }

/* ── Two-column layout ─────────────────────────────────────────── */
.doc-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 48px;
  max-width: 1160px;
  margin: 0 auto;
  padding: 40px 24px 100px;
  align-items: start;
}

/* ── Sidebar TOC ───────────────────────────────────────────────── */
.toc {
  position: sticky;
  top: 72px;
  max-height: calc(100vh - 90px);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--line-strong) transparent;
}

.toc-label {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 12px;
  padding: 0 6px;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.toc-list a {
  display: block;
  font-size: 13px;
  color: var(--text-mute);
  text-decoration: none;
  padding: 5px 8px;
  border-radius: 5px;
  transition: background 0.12s, color 0.12s;
  border-left: 2px solid transparent;
}

.toc-list a:hover { background: var(--bg-card); color: var(--text); }

.toc-list .toc-sub a {
  font-size: 12px;
  padding-left: 18px;
}

/* ── Main content ──────────────────────────────────────────────── */
.doc-content { min-width: 0; }

.doc-section { scroll-margin-top: 80px; }

/* ── Headings ──────────────────────────────────────────────────── */
.section-label {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
  display: block;
}

h1.doc-title {
  font-family: var(--serif);
  font-size: 44px;
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--text);
  margin-bottom: 14px;
}

.doc-intro {
  font-family: var(--serif);
  font-style: italic;
  font-size: 17px;
  color: var(--text-mute);
  line-height: 1.6;
  margin-bottom: 36px;
  max-width: 640px;
}

h2.section-heading {
  font-family: var(--serif);
  font-size: 27px;
  font-weight: 400;
  letter-spacing: -0.015em;
  color: var(--text);
  margin: 52px 0 16px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

h3.sub-heading {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin: 24px 0 8px;
  letter-spacing: 0.01em;
}

/* ── Prose ─────────────────────────────────────────────────────── */
p { margin: 0 0 12px; color: var(--text-mute); line-height: 1.65; }
p strong { color: var(--text); font-weight: 500; }

ul, ol { margin: 6px 0 16px 22px; color: var(--text-mute); }
li { margin: 5px 0; line-height: 1.55; }
li strong { color: var(--text); font-weight: 500; }

/* ── Numbered step list ────────────────────────────────────────── */
.steps {
  list-style: none;
  margin: 8px 0 20px;
  padding: 0;
  counter-reset: step-counter;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.steps li {
  counter-increment: step-counter;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.steps li::before {
  content: counter(step-counter);
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 50%;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1px;
}

/* ── Info card grid ────────────────────────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
  margin: 14px 0 24px;
}

.info-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 18px;
}

.info-card .card-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 5px;
}

.info-card .card-body {
  font-size: 12px;
  color: var(--text-mute);
  line-height: 1.5;
}

/* ── Feature list ──────────────────────────────────────────────── */
.feature-list {
  list-style: none;
  margin: 8px 0 20px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.feature-list li {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 16px;
  color: var(--text-mute);
  font-size: 14px;
  line-height: 1.5;
}

.feature-list li strong { color: var(--text); font-weight: 500; }

/* ── Note / warning callouts ───────────────────────────────────── */
.note {
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  padding: 12px 16px;
  margin: 14px 0;
  font-size: 13px;
  color: var(--text-mute);
  line-height: 1.55;
}

.note strong { color: var(--accent); font-weight: 600; }

.warning {
  background: rgba(200,149,149,0.08);
  border-left: 3px solid var(--danger);
  border-radius: 0 8px 8px 0;
  padding: 12px 16px;
  margin: 14px 0;
  font-size: 13px;
  color: var(--text-mute);
  line-height: 1.55;
}

.warning strong { color: var(--danger); font-weight: 600; }

/* ── Tag pills ─────────────────────────────────────────────────── */
.tag-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 8px 0 16px;
}

.tag {
  font-family: var(--mono);
  font-size: 11px;
  background: var(--bg-card);
  border: 1px solid var(--line-strong);
  color: var(--text-mute);
  padding: 3px 9px;
  border-radius: 20px;
}

.tag.accent {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}

/* ── Nav bar illustration ──────────────────────────────────────── */
.nav-bar-demo {
  display: flex;
  gap: 2px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-top: 1px solid var(--line-strong);
  border-radius: 10px;
  padding: 10px 8px;
  margin: 12px 0 20px;
  flex-wrap: wrap;
}

.nav-tab {
  flex: 1;
  min-width: 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 10px;
  font-family: var(--mono);
  letter-spacing: 0.4px;
  color: var(--text-dim);
  text-transform: uppercase;
}

.nav-tab.active {
  background: var(--accent-soft);
  color: var(--accent);
}

/* ── Data table ────────────────────────────────────────────────── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin: 12px 0 24px;
}

.data-table th {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-dim);
  text-align: left;
  padding: 8px 12px;
  border-bottom: 1px solid var(--line-strong);
}

.data-table td {
  padding: 10px 12px;
  color: var(--text-mute);
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  line-height: 1.5;
}

.data-table td strong { color: var(--text); font-weight: 500; }
.data-table tr:last-child td { border-bottom: none; }

/* ── Footer ────────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 28px 24px;
  text-align: center;
  font-size: 11px;
  color: var(--text-dim);
  font-family: var(--mono);
  letter-spacing: 0.4px;
}

.site-footer a { color: var(--text-dim); text-decoration: none; transition: color 0.15s; }
.site-footer a:hover { color: var(--accent); }

/* ── Language selector page ────────────────────────────────────── */
.lang-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 24px;
  gap: 40px;
}

.lang-hero {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.lang-hero-title {
  font-family: var(--serif);
  font-size: 40px;
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--text);
}

.lang-hero-sub {
  font-family: var(--serif);
  font-style: italic;
  font-size: 16px;
  color: var(--text-mute);
}

.lang-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
  max-width: 700px;
  width: 100%;
}

.lang-option {
  display: flex;
  flex-direction: column;
  gap: 3px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px 20px;
  text-decoration: none;
  color: var(--text);
  transition: background 0.15s, border-color 0.15s;
}

.lang-option.available:hover {
  background: var(--bg-raised);
  border-color: var(--accent);
}

.lang-option.coming-soon {
  opacity: 0.4;
  pointer-events: none;
}

.lang-option .lang-name { font-weight: 500; font-size: 15px; }
.lang-option .lang-native { font-size: 12px; color: var(--text-mute); }

.lang-option .lang-badge {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--accent);
  margin-top: 5px;
}

.lang-option.coming-soon .lang-badge { color: var(--text-dim); }

/* ── Responsive ────────────────────────────────────────────────── */
@media (max-width: 820px) {
  .doc-layout {
    grid-template-columns: 1fr;
    padding: 24px 20px 60px;
    gap: 16px;
  }

  .toc {
    position: static;
    max-height: none;
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 16px;
  }

  h1.doc-title  { font-size: 30px; }
  h2.section-heading { font-size: 22px; }
  .card-grid { grid-template-columns: 1fr; }
  .header-nav { display: none; }
}

@media (max-width: 480px) {
  .site-header { padding: 12px 16px; }
  .lang-hero-title { font-size: 28px; }
  .lang-grid { grid-template-columns: 1fr 1fr; }
}