/* LaiRu 0.1 — Documentation Stylesheet */

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

:root {
  --dark:    #16213e;
  --darker:  #0d0d1a;
  --accent:  #c84b11;
  --accent2: #e07b50;
  --bg:      #f7f8fc;
  --surface: #ffffff;
  --text:    #1c1c2e;
  --muted:   #64648a;
  --border:  #dde0ec;
  --code-bg: #1e2030;
  --code-fg: #cdd6f4;
  --max-w:   900px;
  --radius:  6px;
  --mono: 'Fira Mono', 'Cascadia Code', 'Consolas', 'Courier New', monospace;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent2); text-decoration: underline; }

/* ── NAVIGATION ── */
.site-nav {
  background: var(--dark);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 3px solid var(--accent);
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
}
.site-nav .brand {
  color: #fff;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  padding: 0.75rem 1.25rem 0.75rem 0;
  border-right: 1px solid rgba(255,255,255,0.12);
  margin-right: 0.75rem;
  flex-shrink: 0;
  white-space: nowrap;
}
.site-nav .brand em { color: var(--accent2); font-style: normal; }
.site-nav .brand .ver {
  font-size: 0.7rem;
  font-weight: 400;
  opacity: 0.55;
  margin-left: 0.3rem;
}
.nav-links {
  list-style: none;
  display: flex;
  overflow-x: auto;
  padding: 0;
  gap: 0;
  scrollbar-width: none;
}
.nav-links::-webkit-scrollbar { display: none; }
.nav-links a {
  display: block;
  color: rgba(255,255,255,0.6);
  padding: 0.75rem 0.65rem;
  font-size: 0.82rem;
  white-space: nowrap;
  transition: color 0.15s;
  border-bottom: 3px solid transparent;
  margin-bottom: -3px;
}
.nav-links a:hover { color: #fff; text-decoration: none; }
.nav-links a.active {
  color: var(--accent2);
  border-bottom-color: var(--accent2);
}

/* ── HERO ── */
.hero {
  background: linear-gradient(135deg, var(--darker) 0%, var(--dark) 55%, #1c2d5e 100%);
  color: #fff;
  padding: 5rem 1.5rem 4rem;
  text-align: center;
}
.hero-badge {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.28rem 0.85rem;
  border-radius: 2rem;
  margin-bottom: 1.5rem;
}
.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  line-height: 1.15;
}
.hero h1 em { color: var(--accent2); font-style: normal; }
.hero .tagline {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.72);
  max-width: 580px;
  margin: 0 auto 2.5rem;
}
.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-block;
  padding: 0.7rem 1.6rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.93rem;
  transition: opacity 0.15s, transform 0.15s;
}
.btn:hover { opacity: 0.88; text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.35);
}
.btn-outline:hover { border-color: rgba(255,255,255,0.75); color: #fff; }

/* ── PAGE HEADER ── */
.page-header {
  background: var(--dark);
  color: #fff;
  padding: 3rem 1.5rem 2.5rem;
}
.page-header .inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.page-header .crumb {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.38);
  margin-bottom: 0.5rem;
}
.page-header .crumb a { color: rgba(255,255,255,0.5); }
.page-header .crumb a:hover { color: #fff; text-decoration: none; }
.page-header h1 { font-size: 2.2rem; font-weight: 800; margin-bottom: 0.5rem; }
.page-header p { color: rgba(255,255,255,0.62); margin: 0; font-size: 1.02rem; }

/* ── MAIN CONTENT ── */
.page-wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

h2 {
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--dark);
  margin: 2.5rem 0 0.9rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--border);
}
h2:first-child { margin-top: 0; }
h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 1.75rem 0 0.55rem;
  color: var(--text);
}
p { margin-bottom: 1rem; }
ul, ol { margin: 0.5rem 0 1rem 1.5rem; }
li { margin-bottom: 0.4rem; }
strong { font-weight: 600; }

/* ── CODE ── */
pre {
  background: var(--code-bg);
  color: var(--code-fg);
  font-family: var(--mono);
  font-size: 0.875rem;
  line-height: 1.65;
  padding: 1.2rem 1.4rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 0.75rem 0 1.5rem;
  tab-size: 2;
}
code {
  font-family: var(--mono);
  font-size: 0.875em;
  background: #ecedfa;
  color: #2d2d55;
  padding: 0.15em 0.45em;
  border-radius: 3px;
}
pre code {
  background: none;
  color: inherit;
  padding: 0;
  font-size: inherit;
  border-radius: 0;
}

/* ── CARDS ── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(195px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem;
  transition: box-shadow 0.2s, transform 0.2s;
  text-decoration: none;
  color: inherit;
  display: block;
}
.card:hover {
  box-shadow: 0 6px 20px rgba(0,0,0,0.08);
  transform: translateY(-2px);
  text-decoration: none;
}
.card-icon {
  font-size: 1.75rem;
  margin-bottom: 0.6rem;
  display: block;
  line-height: 1;
}
.card h3 { font-size: 0.97rem; margin: 0 0 0.4rem; }
.card p { font-size: 0.85rem; color: var(--muted); margin: 0; line-height: 1.5; }
.card:hover h3 { color: var(--accent); }

/* ── LIVE DEMO ── */
.live-demo {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.4rem;
  margin: 2rem 0;
}
.live-demo-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--accent);
  margin-bottom: 1rem;
}
.demo-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 0.875rem;
}
.demo-table td {
  padding: 0.32rem 0.6rem 0.32rem 0;
  vertical-align: baseline;
  border-bottom: 1px solid var(--border);
}
.demo-table tr:last-child td { border-bottom: none; }
.demo-table .expr { color: var(--muted); width: 55%; }
.demo-table .arrow { color: #bbbccc; width: 6%; text-align: center; }
.demo-table .result { color: var(--dark); font-weight: 600; }

/* ── CALLOUTS ── */
.callout {
  padding: 0.95rem 1.2rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.5rem 0;
  font-size: 0.92rem;
}
.callout-info {
  background: #eef2ff;
  border-left: 4px solid #6366f1;
  color: #3730a3;
}
.callout-warn {
  background: #fff8ec;
  border-left: 4px solid var(--accent);
  color: #7c2d12;
}
.callout strong { font-weight: 700; }

/* ── TABLE ── */
.def-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.75rem 0 1.5rem;
  font-size: 0.9rem;
}
.def-table th {
  background: var(--dark);
  color: #fff;
  text-align: left;
  padding: 0.52rem 1rem;
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.def-table td {
  padding: 0.48rem 1rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.def-table tr:hover td { background: #f4f5fb; }
.def-table td code { font-size: 0.84em; }

/* ── DIVIDER ── */
hr.divider { border: none; border-top: 1px solid var(--border); margin: 2.5rem 0; }

/* ── TWO-COL ── */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin: 1rem 0 1.5rem; }

/* ── CHIPS ── */
.chip {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.18rem 0.5rem;
  border-radius: 3px;
  vertical-align: middle;
  margin-left: 0.4rem;
}
.chip-done    { background: #d1fae5; color: #065f46; }
.chip-partial { background: #fef3c7; color: #92400e; }
.chip-planned { background: #e0e7ff; color: #3730a3; }
.chip-parked  { background: #f1f5f9; color: #475569; }

/* ── FOOTER ── */
.site-footer {
  background: var(--darker);
  color: rgba(255,255,255,0.38);
  padding: 2.5rem 1.5rem;
  margin-top: 4rem;
  font-size: 0.85rem;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  text-align: center;
}
.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.2rem 1.2rem;
  margin-bottom: 1.5rem;
}
.footer-links a { color: rgba(255,255,255,0.5); }
.footer-links a:hover { color: #fff; text-decoration: none; }

/* ── RESPONSIVE ── */
@media (max-width: 680px) {
  .hero h1 { font-size: 2.1rem; }
  .two-col { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: repeat(auto-fill, minmax(155px, 1fr)); }
  .page-wrap { padding: 2rem 1rem 3rem; }
  .page-header { padding: 2rem 1rem 1.75rem; }
}