:root {
  --bg: #0a0a0b;
  --surface: #121314;
  --surface-2: #1a1b1d;
  --border: #222426;
  --border-strong: #303337;
  --text: #ededee;
  --text-2: #b3b6ba;
  --muted: #7f8489;
  --accent: #3ddc97;
  --hand: #f5a524;
  --ai: #a78bfa;
  --font: "Geist", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "Geist Mono", ui-monospace, "SF Mono", Consolas, monospace;
  --top: 56px;
}

* { box-sizing: border-box; }
html { scroll-padding-top: calc(var(--top) + 24px); -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15.5px/1.7 var(--font); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input { font: inherit; color: inherit; }
::selection { background: rgba(61, 220, 151, 0.22); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
[hidden] { display: none !important; }

/* Top bar */
.topbar { position: sticky; top: 0; z-index: 20; height: var(--top); background: var(--bg); border-bottom: 1px solid var(--border); }
.topbar-inner { max-width: 1120px; height: 100%; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; gap: 12px; }
.brand { display: inline-flex; align-items: center; gap: 8px; color: var(--text); font-size: 16px; font-weight: 700; letter-spacing: -0.03em; }
.brand:hover { text-decoration: none; }
.brand img { display: block; }
.accent { color: var(--accent); }
.topbar-sep { color: var(--border-strong); }
.topbar-section { color: var(--text); font-size: 15px; font-weight: 500; }
.topbar-section:hover { text-decoration: none; }
.topbar-link { margin-left: auto; color: var(--muted); font-size: 14px; }
.topbar-link:hover { color: var(--text); text-decoration: none; }
.menu-button { display: none; height: 32px; padding: 0 10px; border: 1px solid var(--border-strong); border-radius: 6px; background: none; font-size: 13px; cursor: pointer; }

/* Layout */
.layout { max-width: 1120px; margin: 0 auto; padding: 0 24px; display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 64px; }
.sidebar { position: sticky; top: var(--top); align-self: start; max-height: calc(100vh - var(--top)); overflow-y: auto; padding: 28px 0 40px; }

.search-box { display: flex; align-items: center; gap: 8px; height: 34px; padding: 0 8px 0 10px; background: var(--surface); border: 1px solid var(--border-strong); border-radius: 6px; color: var(--muted); }
.search-box:focus-within { border-color: var(--accent); }
.search-box svg { width: 15px; height: 15px; flex: none; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }
.search-box input { flex: 1; min-width: 0; border: 0; outline: 0; background: none; font-size: 13.5px; }
.search-box input::placeholder { color: var(--muted); }
.search-box kbd { font: 11px var(--mono); padding: 0 5px; border: 1px solid var(--border-strong); border-radius: 4px; color: var(--muted); }

.nav-group { margin-top: 24px; }
.nav-group p { margin: 0 0 6px; color: var(--text); font-size: 13px; font-weight: 600; }
.nav-group a { display: block; padding: 4px 0 4px 12px; border-left: 1px solid var(--border); color: var(--muted); font-size: 14px; line-height: 1.5; }
.nav-group a:hover { color: var(--text); text-decoration: none; border-left-color: var(--muted); }
.nav-group a[aria-current] { color: var(--accent); border-left-color: var(--accent); }
.search-empty { margin: 16px 0 0; color: var(--muted); font-size: 13.5px; }

/* Content */
.content { min-width: 0; max-width: 700px; padding: 40px 0 64px; }
.doc-section + .doc-section { margin-top: 40px; padding-top: 36px; border-top: 1px solid var(--border); }
h1 { margin: 0 0 16px; font-size: 34px; line-height: 1.2; font-weight: 700; letter-spacing: -0.03em; }
h2 { margin: 0 0 12px; font-size: 22px; line-height: 1.3; font-weight: 650; letter-spacing: -0.02em; }
p { margin: 0 0 16px; color: var(--text-2); }
.lede { font-size: 17px; color: var(--text); line-height: 1.65; }
strong { color: var(--text); font-weight: 600; }
ul { margin: 0 0 16px; padding-left: 20px; color: var(--text-2); }
li { margin: 4px 0; }
li::marker { color: var(--muted); }

code { font: 0.86em var(--mono); padding: 1px 5px; background: var(--surface); border: 1px solid var(--border); border-radius: 4px; color: var(--text); }
pre { margin: 0 0 16px; padding: 14px 16px; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; overflow-x: auto; }
pre code { padding: 0; border: 0; background: none; font-size: 13px; line-height: 1.65; }
kbd { font: 12px var(--mono); padding: 1px 6px; border: 1px solid var(--border-strong); border-bottom-width: 2px; border-radius: 4px; background: var(--surface); color: var(--text); }

table { width: 100%; margin: 0 0 16px; border-collapse: collapse; font-size: 14.5px; }
th { text-align: left; font-weight: 600; color: var(--text); padding: 8px 12px 8px 0; border-bottom: 1px solid var(--border-strong); }
td { padding: 10px 12px 10px 0; border-bottom: 1px solid var(--border); color: var(--text-2); vertical-align: top; }
.pill { font: 600 11px var(--mono); padding: 2px 6px; border-radius: 4px; background: color-mix(in srgb, currentColor 12%, transparent); }
.pill.hand { color: var(--hand); }
.pill.ai { color: var(--ai); }
.pill.both { color: var(--accent); }

.defs { display: grid; grid-template-columns: max-content 1fr; gap: 8px 24px; margin: 0 0 16px; }
.defs dt { color: var(--text); font-weight: 600; }
.defs dd { margin: 0; color: var(--text-2); }

.doc-footer { display: flex; gap: 20px; margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--border); color: var(--muted); font-size: 13.5px; }
.doc-footer a { color: var(--muted); }
.doc-footer a:hover { color: var(--text); }

@media (max-width: 820px) {
  .topbar-inner { padding: 0 16px; }
  .topbar-link { display: none; }
  .menu-button { display: inline-block; margin-left: auto; }
  .layout { display: block; padding: 0 16px; }
  .sidebar { position: fixed; z-index: 19; top: var(--top); left: 0; bottom: 0; width: min(300px, 85vw); max-height: none; padding: 20px 16px 40px; background: var(--bg); border-right: 1px solid var(--border); transform: translateX(-100%); transition: transform 0.18s; }
  .sidebar.open { transform: none; box-shadow: 16px 0 40px rgba(0, 0, 0, 0.5); }
  .content { padding-top: 28px; }
  h1 { font-size: 28px; }
  .defs { grid-template-columns: 1fr; gap: 2px; }
  .defs dd { margin-bottom: 10px; }
}
@media (prefers-reduced-motion: reduce) {
  .sidebar { transition: none; }
}