:root {
  --bg: #fbfaf7;
  --fg: #1d1c1a;
  --muted: #5f5c55;
  --line: #e4e0d8;
  --card: #ffffff;
  --accent: #2f6b4f;
  --code: #f1eee8;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161614;
    --fg: #ecebe6;
    --muted: #a7a398;
    --line: #2e2d29;
    --card: #1e1e1b;
    --accent: #7cc4a0;
    --code: #262622;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
main, header, footer { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header { padding-top: 48px; }
nav { display: flex; gap: 18px; flex-wrap: wrap; font-size: 15px; margin-bottom: 40px; }
nav a:first-child { font-weight: 650; color: var(--fg); margin-right: auto; }
h1 { font-size: 36px; line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 16px; }
h2 { font-size: 22px; margin: 48px 0 12px; letter-spacing: -0.01em; }
h3 { font-size: 18px; margin: 28px 0 8px; }
p, li { color: var(--fg); }
.lead { font-size: 19px; color: var(--muted); margin: 0 0 28px; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
code, pre { font: 14px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
code { background: var(--code); padding: 2px 5px; border-radius: 4px; overflow-wrap: anywhere; }
pre { background: var(--code); padding: 14px 16px; border-radius: 8px; overflow-x: auto; }
pre code { background: none; padding: 0; }
.chat {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 20px;
  margin: 8px 0 8px;
}
.chat p { margin: 0 0 10px; }
.chat p:last-child { margin-bottom: 0; }
.chat b { color: var(--muted); font-weight: 600; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 16px 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; }
.card h3 { margin: 0 0 6px; font-size: 16px; }
.card p { margin: 0; font-size: 15px; color: var(--muted); }
table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 12px 0; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }
.note { border-left: 3px solid var(--accent); padding: 4px 0 4px 14px; color: var(--muted); }
footer { margin-top: 64px; padding-bottom: 48px; border-top: 1px solid var(--line); padding-top: 20px;
  font-size: 14px; color: var(--muted); }
footer a { color: var(--muted); }
@media (max-width: 520px) {
  h1 { font-size: 28px; }
  body { font-size: 16px; }
  .wide { display: block; overflow-x: auto; }
  .grid { grid-template-columns: 1fr; }
}