:root {
  --bg: #ffffff;
  --fg: #0f172a;
  --muted: #56637a;
  --line: #e3e8ef;
  --brand: #2563eb;
  --brand-ink: #1d4ed8;
  --code-bg: #0f172a;
  --code-fg: #dbe6f5;
  --inline-bg: #f1f5f9;
  --sidebar: #fbfcfe;
  --callout: #f6f9ff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --fg: #e8eefb;
    --muted: #94a3c4;
    --line: #1e293b;
    --brand: #60a5fa;
    --brand-ink: #93c5fd;
    --code-bg: #060d1a;
    --code-fg: #d3dff2;
    --inline-bg: #16213a;
    --sidebar: #0d1626;
    --callout: #101b31;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.7 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-ink); text-decoration: underline; }

.skip {
  position: absolute; left: -9999px; top: 0; background: var(--brand);
  color: #fff; padding: 0.6rem 1rem; z-index: 10;
}
.skip:focus { left: 0; }

/* -- top bar --------------------------------------------------------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 0.85rem 1.5rem; border-bottom: 1px solid var(--line);
  position: sticky; top: 0; background: var(--bg); z-index: 5;
}
.brand {
  display: inline-flex; align-items: center; gap: 0.55rem;
  font-weight: 650; color: var(--fg); letter-spacing: -0.01em;
}
.brand:hover { text-decoration: none; }
.brand img { border-radius: 50%; display: block; }
.toplinks { display: flex; gap: 1.25rem; font-size: 0.92rem; }
.toplinks a { color: var(--muted); }

/* -- layout ---------------------------------------------------------- */
.layout { display: flex; align-items: flex-start; }
.sidebar {
  width: 250px; flex: none; padding: 1.75rem 1rem 4rem 1.5rem;
  border-right: 1px solid var(--line); background: var(--sidebar);
  position: sticky; top: 57px; max-height: calc(100vh - 57px); overflow-y: auto;
}
.navgroup {
  font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--muted); font-weight: 700; margin: 1.5rem 0 0.5rem;
}
.navgroup:first-child { margin-top: 0; }
.sidebar ul { list-style: none; margin: 0; padding: 0; }
.sidebar li { margin: 0; }
.sidebar li a {
  display: block; padding: 0.28rem 0.55rem; border-radius: 6px;
  color: var(--muted); font-size: 0.9rem;
}
.sidebar li a:hover { background: var(--inline-bg); color: var(--fg); text-decoration: none; }
.sidebar li a.active { background: var(--brand); color: #fff; font-weight: 600; }

main { flex: 1; min-width: 0; padding: 2.5rem 2.5rem 5rem; }
article { max-width: 46rem; }

/* -- prose ----------------------------------------------------------- */
h1 { font-size: 2.1rem; letter-spacing: -0.025em; margin: 0 0 1.25rem; line-height: 1.15; }
h2 {
  font-size: 1.35rem; letter-spacing: -0.015em; margin: 2.75rem 0 0.85rem;
  padding-top: 0.4rem; border-top: 1px solid var(--line);
}
h3 { font-size: 1.05rem; margin: 2rem 0 0.6rem; }
p { margin: 0 0 1.05rem; }
ul, ol { margin: 0 0 1.1rem; padding-left: 1.3rem; }
li { margin: 0.3rem 0; }
strong { font-weight: 650; }
hr { border: 0; border-top: 1px solid var(--line); margin: 2.5rem 0; }

code {
  background: var(--inline-bg); padding: 0.12em 0.4em; border-radius: 5px;
  font-size: 0.875em;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}
pre {
  background: var(--code-bg); color: var(--code-fg);
  padding: 1.05rem 1.15rem; border-radius: 10px; overflow-x: auto;
  font-size: 0.85rem; line-height: 1.6; margin: 0 0 1.4rem;
}
pre code { background: none; padding: 0; color: inherit; font-size: inherit; }

table { width: 100%; border-collapse: collapse; margin: 0 0 1.5rem; font-size: 0.94rem; display: block; overflow-x: auto; }
th, td { text-align: left; padding: 0.6rem 0.75rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); font-weight: 650; }

blockquote {
  margin: 0 0 1.2rem; padding: 0.1rem 1rem; border-left: 3px solid var(--line); color: var(--muted);
}

/* -- components ------------------------------------------------------ */
.callout {
  background: var(--callout); border: 1px solid var(--line);
  border-left: 3px solid var(--brand);
  padding: 0.9rem 1.1rem; border-radius: 8px; margin: 0 0 1.4rem;
}
.callout strong { display: block; margin-bottom: 0.3rem; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--brand); }
.callout p:last-child { margin-bottom: 0; }
.callout.warning { border-left-color: #d97706; }
.callout.warning strong { color: #d97706; }

.cards { display: grid; gap: 0.9rem; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); margin: 0 0 1.6rem; }
.card {
  display: block; padding: 1rem 1.1rem; border: 1px solid var(--line);
  border-radius: 10px; color: var(--fg);
}
.card:hover { border-color: var(--brand); text-decoration: none; }
.card strong { display: block; margin-bottom: 0.3rem; color: var(--brand); }
.card span { color: var(--muted); font-size: 0.92rem; }

.field { border-left: 2px solid var(--line); padding: 0.15rem 0 0.15rem 0.9rem; margin: 0 0 1rem; }
.field .type { color: var(--muted); font-size: 0.82rem; margin-left: 0.35rem; }
.field .req {
  font-style: normal; font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.06em;
  color: #d97706; margin-left: 0.5rem; font-weight: 700;
}
.field p { margin: 0.35rem 0 0; color: var(--muted); font-size: 0.94rem; }

.pagefoot {
  margin-top: 4rem; padding-top: 1.5rem; border-top: 1px solid var(--line);
  color: var(--muted); font-size: 0.88rem;
}

/* -- syntax highlighting --------------------------------------------- */
.codehilite .c, .codehilite .c1, .codehilite .cm { color: #8aa2c8; font-style: italic; }
.codehilite .k, .codehilite .kd, .codehilite .kn { color: #93c5fd; }
.codehilite .s, .codehilite .s1, .codehilite .s2, .codehilite .sb { color: #86efac; }
.codehilite .nt { color: #93c5fd; }
.codehilite .na { color: #fcd34d; }
.codehilite .mi, .codehilite .mf { color: #fca5a5; }
.codehilite .nf { color: #c4b5fd; }

/* -- responsive ------------------------------------------------------ */
@media (max-width: 880px) {
  .layout { flex-direction: column; }
  .sidebar {
    width: 100%; position: static; max-height: none;
    border-right: 0; border-bottom: 1px solid var(--line); padding: 1.25rem 1.5rem;
  }
  main { padding: 2rem 1.5rem 4rem; width: 100%; }
  .toplinks a:first-child { display: none; }
}