:root {
  --bg: #0b0d10;
  --panel: #14171c;
  --panel-2: #1b1f26;
  --line: #262c36;
  --text: #e8ecf1;
  --muted: #8b95a5;
  --accent: #7c5cff;
  --accent-2: #22d3a6;
  --warn: #ffb020;
  --maxw: 1160px;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 ui-sans-serif, -apple-system, "Segoe UI", Roboto, "Noto Sans SC", sans-serif;
  -webkit-text-size-adjust: 100%;
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

.hero {
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(900px 320px at 15% -30%, rgb(124 92 255 / 22%), transparent),
    radial-gradient(700px 280px at 85% -20%, rgb(34 211 166 / 14%), transparent);
  padding: 64px 0 44px;
}

.eyebrow {
  color: var(--accent-2);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 0 0 12px;
}

.hero h1 {
  font-size: clamp(28px, 5.4vw, 46px);
  line-height: 1.12;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}

.hero .sub {
  color: var(--muted);
  font-size: clamp(15px, 2.2vw, 18px);
  margin: 0 0 22px;
  max-width: 46ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn {
  display: inline-block;
  padding: 9px 16px;
  border-radius: 9px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 14.5px;
  text-decoration: none;
}

.btn.ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--text);
  font-weight: 500;
}

.layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding-top: 36px;
  padding-bottom: 72px;
}

.toc {
  display: none;
}

.doc {
  min-width: 0;
}

.doc h2 {
  font-size: 24px;
  margin: 44px 0 14px;
  padding-top: 8px;
  letter-spacing: -0.01em;
  border-top: 1px solid var(--line);
}

.doc h2:first-child {
  margin-top: 0;
  border-top: none;
  padding-top: 0;
}

.doc h3 {
  font-size: 18px;
  margin: 30px 0 10px;
}

.doc h4 {
  font-size: 16px;
  margin: 24px 0 8px;
}

.doc p,
.doc li {
  color: #d5dae2;
}

.doc a {
  color: var(--accent-2);
}

.doc code {
  background: var(--panel-2);
  border: 1px solid var(--line);
  padding: 1.5px 6px;
  border-radius: 6px;
  font-size: 13.5px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.doc pre {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.doc pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 13.5px;
  line-height: 1.6;
}

.doc table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0;
  font-size: 14.5px;
  display: block;
  overflow-x: auto;
}

.doc th,
.doc td {
  text-align: left;
  padding: 9px 12px;
  border-bottom: 1px solid var(--line);
}

.doc th {
  color: var(--muted);
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.doc blockquote {
  border-left: 3px solid var(--accent);
  margin: 18px 0;
  padding: 4px 0 4px 16px;
  color: var(--muted);
}

.doc hr {
  border: none;
  border-top: 1px solid var(--line);
  margin: 40px 0;
}

.doc strong {
  color: #fff;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 24px 20px 40px;
  color: var(--muted);
  font-size: 13.5px;
}

@media (min-width: 900px) {
  .layout {
    grid-template-columns: 232px 1fr;
    gap: 48px;
  }

  .toc {
    display: block;
    position: sticky;
    top: 24px;
    align-self: start;
    max-height: calc(100vh - 48px);
    overflow-y: auto;
    font-size: 14px;
  }

  .toc-label {
    color: var(--muted);
    font-size: 11.5px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin: 0 0 10px;
  }

  .toc ul {
    list-style: none;
    margin: 0;
    padding: 0;
    border-left: 1px solid var(--line);
  }

  .toc li a {
    display: block;
    padding: 5px 0 5px 14px;
    margin-left: -1px;
    border-left: 2px solid transparent;
    color: var(--muted);
    text-decoration: none;
  }

  .toc li a:hover {
    color: var(--text);
    border-left-color: var(--accent);
  }
}