:root {
  --bg: #efeee9;
  --paper: #f8f7f3;
  --fg: #17172b;
  --muted: rgba(23, 23, 43, 0.72);
  --faint: rgba(23, 23, 43, 0.2);
  --accent: #2b25d9;
  --on-accent: #ffffff;
  --logo-filter: none;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  --hand: Caveat, "Comic Sans MS", cursive;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #0e0e16;
  --paper: #17171f;
  --fg: #f1f0ea;
  --muted: rgba(241, 240, 234, 0.7);
  --faint: rgba(241, 240, 234, 0.2);
  --accent: #8d88ff;
  --on-accent: #0e0e16;
  --logo-filter: invert(1);
  color-scheme: dark;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: Inter, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-weight: 300;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); }
header {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: clamp(20px, 4vw, 36px) clamp(16px, 4vw, 48px);
}
header img { display: block; height: clamp(22px, 2.6vw, 28px); width: auto; filter: var(--logo-filter); }
header .back { font-family: var(--mono); font-size: 0.85rem; color: var(--fg); text-decoration: none; }
header .back:hover { color: var(--accent); }
.doc {
  max-width: 760px; margin: 0 auto 72px; padding: clamp(24px, 4vw, 48px) clamp(20px, 4vw, 48px);
  background: var(--paper); border: 1px solid var(--faint); border-radius: 28px;
}
.doc-wrap { padding: 0 16px; }
.doc .kicker { font-family: var(--mono); font-size: 0.8rem; color: var(--accent); margin: 0 0 8px; }
.doc h1 { font-size: clamp(1.9rem, 4vw, 2.6rem); font-weight: 500; letter-spacing: -0.03em; line-height: 1.1; margin: 0 0 8px; }
.doc .hand { font-family: var(--hand); font-weight: 700; font-size: 1.5rem; color: var(--accent); margin: 0 0 28px; }
.doc h2 { font-size: 1.15rem; font-weight: 500; margin: 32px 0 8px; }
.doc p, .doc li { color: var(--muted); }
.doc strong { color: var(--fg); font-weight: 500; }
.doc ul { padding-left: 1.2em; margin: 8px 0; }
.doc li { margin: 4px 0; }
.doc .updated { font-family: var(--mono); font-size: 0.78rem; color: var(--muted); margin-top: 36px; }
footer {
  border-top: 1px solid var(--faint); padding: 24px clamp(16px, 4vw, 48px);
  display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between;
  font-family: var(--mono); font-size: 0.8rem; color: var(--muted);
}
footer a { color: inherit; }