:root { color-scheme: light dark; --bg: #f7f8f9; --fg: #172b4d; --muted: #5e6c84; --card: #fff; --line: #dfe1e6; --accent: #0c66e4; }
@media (prefers-color-scheme: dark) { :root { --bg: #1d2125; --fg: #dee4ea; --muted: #9fadbc; --card: #22272b; --line: #38414a; --accent: #579dff; } }
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.5 -apple-system, "Segoe UI", system-ui, sans-serif; background: var(--bg); color: var(--fg); }
main { max-width: 760px; margin: 0 auto; padding: 40px 20px 64px; }
h1 { font-size: 28px; margin: 0 0 4px; }
.lead { color: var(--muted); margin: 0 0 32px; }
section { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 20px 24px; margin: 0 0 20px; }
h2 { font-size: 20px; margin: 0 0 4px; }
.meta { color: var(--muted); font-size: 14px; margin: 0 0 12px; }
.button { display: inline-block; background: var(--accent); color: #fff; text-decoration: none; padding: 9px 16px; border-radius: 6px; font-weight: 600; }
.secondary { color: var(--accent); }
.notes { white-space: pre-line; margin: 12px 0; }
ol { padding-left: 20px; margin: 12px 0 0; }
code { font: 12px ui-monospace, Menlo, Consolas, monospace; word-break: break-all; }
.none { color: var(--muted); }