:root {
  --bg: #fbfaff; --fg: #1d1b26; --muted: #5d5a6b; --accent: #5233d6; --card: #ffffff; --line: #e4e0f2;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #17151f; --fg: #eceaf4; --muted: #a9a5b8; --accent: #a996ff; --card: #211e2c; --line: #34304a; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 "Segoe UI", system-ui, -apple-system, sans-serif; }
header, main, footer { max-width: 820px; margin: 0 auto; padding: 0 20px; }
header { display: flex; align-items: center; gap: 12px; padding-top: 20px; padding-bottom: 8px; flex-wrap: wrap; }
header a.brand { display: flex; align-items: center; gap: 10px; color: var(--fg); text-decoration: none; font-weight: 600; font-size: 18px; }
header nav { margin-left: auto; display: flex; gap: 16px; flex-wrap: wrap; }
a { color: var(--accent); }
h1 { font-size: 30px; line-height: 1.25; margin: 28px 0 8px; }
h2 { font-size: 21px; margin: 32px 0 8px; }
h3 { font-size: 17px; margin: 22px 0 4px; }
.lead { font-size: 18px; color: var(--muted); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 4px 20px; margin: 16px 0; }
table { border-collapse: collapse; width: 100%; margin: 8px 0; }
th, td { text-align: left; border-bottom: 1px solid var(--line); padding: 8px 6px; vertical-align: top; }
code { background: var(--line); border-radius: 4px; padding: 1px 5px; font-size: 14px; word-break: break-all; }
footer { color: var(--muted); font-size: 14px; padding-top: 24px; padding-bottom: 32px; border-top: 1px solid var(--line); margin-top: 40px; }