/* ---------------------------------------------------------------------
   Tokens
--------------------------------------------------------------------- */
:root {
  --bg: #15181d;
  --bg-raised: #1b1f26;
  --bg-sunken: #0f1216;
  --border: #2a2f38;
  --text: #e6e8eb;
  --text-muted: #949ba7;
  --text-faint: #656c78;
  --accent: #d3a24c;
  --accent-soft: rgba(211, 162, 76, 0.14);
  --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --sidenav-w: 264px;
  --radius: 6px;
}

* { box-sizing: border-box; }

html {
  scroll-padding-top: 24px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ---------------------------------------------------------------------
   Shell / layout
--------------------------------------------------------------------- */
.shell {
  display: flex;
  min-height: 100vh;
}

/* ---------------------------------------------------------------------
   Sidenav
--------------------------------------------------------------------- */
.sidenav {
  width: var(--sidenav-w);
  flex: 0 0 var(--sidenav-w);
  background: var(--bg-sunken);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
}

.sidenav-brand {
  display: block;
  padding: 20px 22px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}
.sidenav-brand:hover { color: var(--accent); text-decoration: none; }

.sidenav-scroll {
  overflow-y: auto;
  padding: 10px 10px 24px;
  flex: 1;
}

.sidenav-footer {
  padding: 10px 22px;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-faint);
  letter-spacing: 0.02em;
}

.nav-section {
  margin: 2px 0;
}

.nav-section summary {
  list-style: none;
  cursor: pointer;
  padding: 9px 12px;
  border-radius: var(--radius);
  color: var(--text);
  font-weight: 500;
  font-size: 13.5px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}
.nav-section summary::-webkit-details-marker { display: none; }

.nav-section summary::after {
  content: '';
  width: 7px;
  height: 7px;
  border-right: 1.5px solid var(--text-faint);
  border-bottom: 1.5px solid var(--text-faint);
  transform: rotate(-45deg);
  transition: transform 0.15s ease;
  margin-right: 2px;
}
.nav-section[open] summary::after {
  transform: rotate(45deg);
}

.nav-section summary:hover {
  background: var(--bg-raised);
}

.nav-section ul {
  list-style: none;
  margin: 2px 0 6px;
  padding: 0;
  border-left: 1px solid var(--border);
  margin-left: 16px;
}

.nav-section li a {
  display: block;
  padding: 7px 14px;
  margin-left: -1px;
  border-left: 1.5px solid transparent;
  color: var(--text-muted);
  font-size: 13.5px;
}

.nav-section li a:hover {
  color: var(--text);
  text-decoration: none;
  background: var(--bg-raised);
}

.nav-section li a.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: var(--accent-soft);
  font-weight: 500;
}

/* ---------------------------------------------------------------------
   Content
--------------------------------------------------------------------- */
.content {
  flex: 1;
  min-width: 0;
  display: flex;
  justify-content: center;
  padding: 56px 32px 96px;
}

.doc {
  width: 100%;
  max-width: 720px;
}

.doc h1 {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
}

.doc .lede {
  color: var(--text-muted);
  font-size: 17px;
  margin: 0 0 36px;
}

.doc h2 {
  font-size: 20px;
  font-weight: 600;
  margin: 40px 0 14px;
  padding-top: 4px;
  border-top: 1px solid var(--border);
}
.doc h2:first-child { border-top: none; padding-top: 0; }

.doc h3 {
  font-size: 16px;
  font-weight: 600;
  margin: 28px 0 10px;
}

.doc p {
  margin: 0 0 16px;
  max-width: 68ch;
}

.doc ul, .doc ol {
  margin: 0 0 16px;
  padding-left: 22px;
  max-width: 68ch;
}
.doc li { margin: 4px 0; }

.doc code {
  font-family: var(--font-mono);
  font-size: 0.87em;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.1em 0.4em;
}

.doc table {
  border-collapse: collapse;
  width: 100%;
  margin: 0 0 20px;
  font-size: 14px;
}
.doc th, .doc td {
  text-align: left;
  padding: 8px 12px;
  border: 1px solid var(--border);
}
.doc th {
  background: var(--bg-raised);
  font-weight: 600;
}

.doc blockquote {
  margin: 0 0 16px;
  padding: 2px 16px;
  border-left: 3px solid var(--accent);
  color: var(--text-muted);
  background: var(--bg-raised);
  border-radius: 0 var(--radius) var(--radius) 0;
}

/* ---------------------------------------------------------------------
   Code blocks
--------------------------------------------------------------------- */
.code-block {
  position: relative;
  margin: 0 0 22px;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg-sunken);
}

.code-block-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 14px;
  background: var(--bg-raised);
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
}

.code-block pre {
  margin: 0;
  padding: 16px;
  overflow-x: auto;
}

.code-block pre code.hljs {
  background: transparent;
  padding: 0;
  border: none;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.55;
}

.copy-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 4px;
  font-family: var(--font-ui);
  font-size: 11.5px;
  padding: 3px 9px;
  cursor: pointer;
}
.copy-btn:hover { color: var(--text); border-color: var(--text-faint); }
.copy-btn.copied { color: var(--accent); border-color: var(--accent); }

/* ---------------------------------------------------------------------
   Mobile nav toggle
--------------------------------------------------------------------- */
.nav-toggle {
  display: none;
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 30;
  width: 38px;
  height: 38px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-raised);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
}
.nav-toggle span {
  width: 16px;
  height: 1.5px;
  background: var(--text);
}

.sidenav-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 19;
}

@media (max-width: 860px) {
  .nav-toggle { display: flex; }

  .sidenav {
    position: fixed;
    z-index: 20;
    left: 0;
    top: 0;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    box-shadow: 2px 0 24px rgba(0, 0, 0, 0.4);
  }
  .sidenav.open { transform: translateX(0); }

  .sidenav-backdrop.open { display: block; }

  .content { padding: 84px 20px 64px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}