:root {
  --bg: #fbfbf9;
  --bg-elev: #ffffff;
  --fg: #16181d;
  --fg-muted: #5b6270;
  --line: #e3e5e8;
  --accent: #4f8f1f;
  --accent-strong: #3e7418;
  --accent-soft: rgba(79, 143, 31, 0.10);
  --code-bg: #f3f4f1;
  --grid: rgba(22, 24, 29, 0.055);
  --shadow: 0 1px 2px rgba(0,0,0,.04), 0 8px 24px -12px rgba(0,0,0,.12);
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1114;
    --bg-elev: #15181d;
    --fg: #e6e8ec;
    --fg-muted: #9aa3b0;
    --line: #262b33;
    --accent: #7ac043;
    --accent-strong: #93d35c;
    --accent-soft: rgba(122, 192, 67, 0.14);
    --code-bg: #1a1e24;
    --grid: rgba(230, 232, 236, 0.06);
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px -12px rgba(0,0,0,.6);
  }
}
:root[data-theme="dark"] {
  --bg: #0f1114; --bg-elev: #15181d; --fg: #e6e8ec; --fg-muted: #9aa3b0; --line: #262b33;
  --accent: #7ac043; --accent-strong: #93d35c; --accent-soft: rgba(122, 192, 67, 0.14);
  --code-bg: #1a1e24; --grid: rgba(230, 232, 236, 0.06);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font-family: var(--sans); font-size: 16px; line-height: 1.6;
  overflow-x: hidden; -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-strong); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { max-width: 100%; }
code, pre, kbd { font-family: var(--mono); font-size: 0.875em; }
code { background: var(--code-bg); padding: 0.12em 0.38em; border-radius: 5px; }
pre {
  background: var(--code-bg); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px 16px; overflow-x: auto; max-width: 100%; line-height: 1.55; margin: 1em 0;
  -webkit-overflow-scrolling: touch;
}
pre code { background: none; padding: 0; font-size: 0.8125rem; }
.highlight pre { margin: 0; }
.highlight { margin: 1em 0; border-radius: var(--radius); min-width: 0; max-width: 100%; overflow-x: auto; }
table { border-collapse: collapse; width: 100%; display: block; overflow-x: auto; font-size: 0.9375rem; margin: 1em 0; }
th, td { border: 1px solid var(--line); padding: 8px 12px; text-align: left; vertical-align: top; }
th { background: var(--code-bg); font-weight: 600; }
td code { white-space: nowrap; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; min-width: 0; }
.hero .wrap > *, .quick > *, .cite > *, .flow-note > *, .docs-layout > * { min-width: 0; }

/* top bar */
.top { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 56px; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-weight: 700; color: var(--fg); letter-spacing: -0.01em; }
.brand svg { color: var(--accent); }
.top nav { display: flex; gap: 4px; }
.top nav a { color: var(--fg-muted); padding: 6px 10px; border-radius: 6px; font-size: 0.9375rem; font-weight: 500; }
.top nav a:hover, .top nav a.active { color: var(--fg); background: var(--accent-soft); text-decoration: none; }

/* hero */
.hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); }
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: radial-gradient(ellipse 70% 80% at 60% 20%, #000 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 70% 80% at 60% 20%, #000 30%, transparent 100%);
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(ellipse 50% 60% at 85% 10%, var(--accent-soft), transparent 70%);
}
.hero .wrap { position: relative; padding: 72px 16px 64px; display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 40px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 0.8125rem; font-weight: 500; color: var(--accent-strong); background: var(--accent-soft); padding: 4px 10px; border-radius: 999px; margin-bottom: 18px; }
.eyebrow::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
h1.title { font-size: clamp(2.5rem, 6vw, 4rem); line-height: 1.02; letter-spacing: -0.035em; margin: 0 0 16px; font-weight: 700; }
.tagline { font-size: clamp(1.125rem, 2vw, 1.375rem); color: var(--fg-muted); margin: 0 0 28px; max-width: 34ch; line-height: 1.4; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 11px 18px; border-radius: 8px; font-weight: 600; font-size: 0.9375rem; border: 1px solid var(--line); color: var(--fg); background: var(--bg-elev); transition: transform .12s ease, background .12s ease; }
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-strong); }
.hero-code { min-width: 0; background: var(--bg-elev); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); overflow: hidden; }
.hero-code .bar { display: flex; align-items: center; gap: 6px; padding: 10px 14px; border-bottom: 1px solid var(--line); font-size: 0.75rem; color: var(--fg-muted); font-family: var(--mono); }
.hero-code .bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--line); display: inline-block; }
.hero-code pre { border: 0; border-radius: 0; margin: 0; background: transparent; padding: 16px 18px; }
.hero-code .c { color: var(--fg-muted); }
.hero-code .k { color: var(--accent-strong); }

/* sections */
section.band { padding: 64px 0; border-bottom: 1px solid var(--line); }
section.band:last-of-type { border-bottom: 0; }
.band h2 { font-size: 1.75rem; letter-spacing: -0.02em; margin: 0 0 8px; }
.band .lead { color: var(--fg-muted); margin: 0 0 32px; max-width: 60ch; }
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.card { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.card svg { color: var(--accent); margin-bottom: 12px; }
.card h3 { margin: 0 0 6px; font-size: 1.0625rem; }
.card p { margin: 0; color: var(--fg-muted); font-size: 0.9375rem; }

.flow { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--bg-elev); }
.flow .step { padding: 22px 22px 22px 24px; position: relative; border-right: 1px solid var(--line); }
.flow .step:last-child { border-right: 0; }
.flow .n { font-family: var(--mono); font-size: 0.75rem; color: var(--accent-strong); letter-spacing: 0.08em; }
.flow h3 { margin: 6px 0 6px; font-size: 1.0625rem; }
.flow p { margin: 0; color: var(--fg-muted); font-size: 0.9375rem; }
.flow-note { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 16px; }
.flow-note div { border-left: 3px solid var(--accent); padding: 4px 0 4px 14px; color: var(--fg-muted); font-size: 0.9375rem; }
.flow-note strong { color: var(--fg); }

.quick { display: grid; min-width: 0; grid-template-columns: 1fr 1fr; gap: 20px; }
.quick h3 { font-size: 0.8125rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--fg-muted); margin: 0 0 8px; }
.quick pre { margin: 0 0 20px; }

.vocabs { display: flex; flex-wrap: wrap; gap: 10px; }
.chip { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--line); background: var(--bg-elev); border-radius: 999px; padding: 8px 14px; font-weight: 500; font-size: 0.9375rem; }
.chip code { font-size: 0.75rem; color: var(--fg-muted); background: var(--code-bg); }

.cite { display: grid; min-width: 0; grid-template-columns: 0.9fr 1.1fr; gap: 28px; align-items: start; }
.cite p { color: var(--fg-muted); }
.cite .soon { display: inline-block; font-size: 0.8125rem; color: var(--fg-muted); border: 1px dashed var(--line); padding: 4px 10px; border-radius: 6px; }
.cite pre { margin: 0; }

.foot { border-top: 1px solid var(--line); padding: 28px 0; color: var(--fg-muted); font-size: 0.875rem; }
.foot .wrap { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

/* docs layout */
.docs-layout { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 48px; padding-top: 32px; padding-bottom: 64px; }
.sidebar { position: sticky; top: 72px; align-self: start; }
.side-title { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--fg-muted); margin: 0 0 10px; }
.sidebar ul { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--line); }
.sidebar li a { display: block; padding: 6px 14px; color: var(--fg-muted); font-size: 0.9375rem; margin-left: -1px; border-left: 1px solid transparent; }
.sidebar li a:hover { color: var(--fg); text-decoration: none; }
.sidebar li a.active { color: var(--accent-strong); border-left-color: var(--accent); font-weight: 500; }
.content { min-width: 0; max-width: 78ch; }
.content h1 { font-size: 2.125rem; letter-spacing: -0.025em; margin: 0 0 20px; line-height: 1.15; }
.content h2 { font-size: 1.5rem; letter-spacing: -0.015em; margin: 2em 0 0.6em; padding-top: 0.6em; border-top: 1px solid var(--line); }
.content h3 { font-size: 1.1875rem; margin: 1.6em 0 0.5em; }
.content h4 { font-size: 1.0625rem; margin: 1.4em 0 0.4em; }
.content li { margin: 0.25em 0; }
.content ul.task-list, .content input[type=checkbox] { margin-right: 6px; }

@media (max-width: 900px) {
  .hero .wrap { grid-template-columns: 1fr; padding: 48px 16px 44px; }
  .cards { grid-template-columns: 1fr 1fr; }
  .flow { grid-template-columns: 1fr; }
  .flow .step { border-right: 0; border-bottom: 1px solid var(--line); }
  .flow .step:last-child { border-bottom: 0; }
  .quick, .cite, .flow-note { grid-template-columns: 1fr; }
  .docs-layout { grid-template-columns: 1fr; gap: 24px; }
  .sidebar { position: static; }
  .sidebar ul { display: flex; flex-wrap: wrap; gap: 4px; border-left: 0; }
  .sidebar li a { border: 1px solid var(--line); border-radius: 6px; padding: 5px 10px; font-size: 0.875rem; margin: 0; }
  .sidebar li a.active { border-color: var(--accent); }
}
@media (max-width: 560px) {
  .cards { grid-template-columns: 1fr; }
  section.band { padding: 44px 0; }
  .top nav a { padding: 6px 8px; }
}