:root {
  --bg: #fbfaf7;
  --fg: #1d1d1b;
  --muted: #5f5e5a;
  --line: #e4e1da;
  --accent: #2f6f5e;
  --card: #ffffff;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161715;
    --fg: #ecebe6;
    --muted: #a5a39c;
    --line: #2d2e2b;
    --accent: #7cc4ad;
    --card: #1e1f1c;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main, header, footer { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { display: flex; justify-content: space-between; align-items: center; padding-top: 24px; padding-bottom: 8px; }
header a.brand { font-weight: 700; font-size: 1.15rem; color: var(--fg); text-decoration: none; }
nav a { margin-left: 16px; }
a { color: var(--accent); }
h1 { font-size: 2.1rem; line-height: 1.2; margin: 48px 0 12px; }
h2 { font-size: 1.3rem; margin: 40px 0 8px; }
h3 { font-size: 1.05rem; margin: 24px 0 4px; }
p.lead { font-size: 1.15rem; color: var(--muted); margin-top: 0; }
.muted { color: var(--muted); }
code { font-size: .92em; background: var(--card); border: 1px solid var(--line); border-radius: 4px; padding: 0 4px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; margin-top: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px; }
.card h3 { margin-top: 0; }
.card p { margin: 0; color: var(--muted); }
.button {
  display: inline-block; margin: 8px 8px 0 0; padding: 10px 18px; border-radius: 8px;
  background: var(--accent); color: var(--bg); text-decoration: none; font-weight: 600;
}
.button.secondary { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
table { border-collapse: collapse; width: 100%; margin: 12px 0; font-size: .95rem; }
th, td { text-align: left; vertical-align: top; padding: 8px; border-bottom: 1px solid var(--line); }
footer { margin-top: 64px; padding-bottom: 32px; border-top: 1px solid var(--line); padding-top: 16px; color: var(--muted); font-size: .9rem; }
hr { border: 0; border-top: 1px solid var(--line); margin: 48px 0; }