:root {
  color-scheme: light;
  --ink: #1b2230;
  --muted: #5a6573;
  --faint: #8a94a3;
  --line: #e4e8ee;
  --paper: #ffffff;
  --panel: #f7f9fc;
  --code-bg: #0f1626;
  --code-ink: #e6edf7;
  --accent: #2f6fde;
  --accent-soft: #eaf1fd;
  --green: #1f8a52;
  --amber: #b07a16;
  --sidebar: 256px;
  --radius: 8px;
  font-family: "Inter", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  font-size: 16px;
}

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

code, pre, kbd {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

/* ---------- top bar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 18px;
  height: 60px;
  padding: 0 24px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.01em;
}

.brand .mark {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: linear-gradient(140deg, var(--accent), #6aa0ff);
  position: relative;
}
.brand .mark::after {
  content: "";
  position: absolute;
  inset: 6px;
  border-radius: 3px;
  background: #fff;
  opacity: 0.85;
}

.version {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 2px 8px;
  border-radius: 999px;
}

.topbar nav {
  margin-left: auto;
  display: flex;
  gap: 20px;
  font-size: 14px;
  color: var(--muted);
  font-weight: 500;
}
.topbar nav a { color: var(--muted); }
.topbar nav a:hover { color: var(--ink); text-decoration: none; }

/* ---------- shell ---------- */
.shell {
  display: grid;
  grid-template-columns: var(--sidebar) minmax(0, 1fr);
  max-width: 1240px;
  margin: 0 auto;
}

.sidebar {
  align-self: start;
  position: sticky;
  top: 60px;
  height: calc(100vh - 60px);
  overflow-y: auto;
  padding: 28px 20px 60px;
  border-right: 1px solid var(--line);
}

.sidebar .group {
  margin-bottom: 26px;
}
.sidebar .group h3 {
  margin: 0 0 10px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--faint);
  font-weight: 700;
}
.sidebar a {
  display: block;
  padding: 6px 10px;
  margin: 1px 0;
  border-radius: 6px;
  color: var(--muted);
  font-size: 14.5px;
}
.sidebar a:hover { background: var(--panel); color: var(--ink); text-decoration: none; }
.sidebar a.active {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}

/* ---------- content ---------- */
.content {
  padding: 44px clamp(20px, 5vw, 72px) 96px;
  max-width: 860px;
}

.breadcrumb {
  font-size: 13px;
  color: var(--faint);
  margin-bottom: 14px;
}

.content h1 {
  font-size: clamp(30px, 4vw, 40px);
  line-height: 1.15;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}
.content h2 {
  font-size: 24px;
  margin: 44px 0 14px;
  padding-top: 8px;
  letter-spacing: -0.01em;
}
.content h3 { font-size: 18px; margin: 30px 0 10px; }

.lead {
  font-size: 19px;
  color: var(--muted);
  margin: 0 0 8px;
}

.content p, .content li { color: #2c3543; }
.content ul, .content ol { padding-left: 22px; }
.content li { margin: 6px 0; }

/* inline code */
.content p code, .content li code, .content td code {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 1px 6px;
  font-size: 0.86em;
  color: #b03a5b;
}

/* code blocks */
pre {
  background: var(--code-bg);
  color: var(--code-ink);
  padding: 18px 20px;
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.65;
  margin: 18px 0;
}
pre code { color: inherit; }
.tok-com { color: #7f8ca5; }
.tok-key { color: #79b8ff; }
.tok-str { color: #9ecbff; }
.tok-fn  { color: #b392f0; }
.tok-num { color: #f7c08a; }

/* callouts */
.note, .warn, .tip {
  border: 1px solid var(--line);
  border-left-width: 4px;
  border-radius: var(--radius);
  padding: 14px 18px;
  margin: 20px 0;
  background: var(--panel);
  font-size: 15px;
}
.note { border-left-color: var(--accent); }
.tip  { border-left-color: var(--green); }
.warn { border-left-color: var(--amber); }
.note strong, .tip strong, .warn strong { display: block; margin-bottom: 4px; }

/* tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 14.5px;
}
th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th { color: var(--muted); font-weight: 600; background: var(--panel); }

/* hero (landing) */
.hero {
  padding: 18px 0 8px;
}
.hero .eyebrow {
  color: var(--accent);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0 0 12px;
}
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 28px 0;
}
.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  background: var(--paper);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.card:hover { border-color: #c4d4f0; box-shadow: 0 6px 18px rgba(20, 40, 80, 0.06); }
.card h3 { margin: 0 0 6px; font-size: 16px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }

/* page nav */
.pagenav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 56px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}
.pagenav a {
  flex: 1;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  color: var(--muted);
}
.pagenav a:hover { border-color: #c4d4f0; text-decoration: none; }
.pagenav .label { display: block; font-size: 12px; color: var(--faint); }
.pagenav .title { color: var(--ink); font-weight: 600; }
.pagenav .next { text-align: right; }

footer.site {
  border-top: 1px solid var(--line);
  padding: 22px 24px;
  color: var(--faint);
  font-size: 13px;
  text-align: center;
}

/* mobile */
.menu-toggle { display: none; }
@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--line);
    display: none;
  }
  .sidebar.open { display: block; }
  .menu-toggle {
    display: inline-flex;
    align-items: center;
    margin-left: auto;
    font-size: 14px;
    color: var(--muted);
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 6px 12px;
    cursor: pointer;
  }
  .topbar nav { display: none; }
}