:root { color-scheme: light dark; --bg: #f6f7fb; --card: #ffffff; --text: #1b1f2a; --muted: #5b6475; --line: #e3e6ef; --accent: #5b5bf0; }
@media (prefers-color-scheme: dark) { :root { --bg: #0f1220; --card: #181c2e; --text: #eef0f8; --muted: #a2a9bd; --line: #2a3050; --accent: #8f95ff; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 40px 16px 64px; }
header { margin-bottom: 20px; }
.brand { font-weight: 700; letter-spacing: -.3px; color: var(--accent); text-decoration: none; font-size: 18px; }
h1 { font-size: clamp(26px, 5vw, 36px); line-height: 1.2; margin: 10px 0 6px; letter-spacing: -.5px; }
h2 { font-size: 19px; margin: 28px 0 6px; }
p, li { color: var(--text); }
.lead, .muted { color: var(--muted); }
section { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 4px 20px 18px; margin-top: 16px; }
ul { padding-left: 20px; }
a { color: var(--accent); }
footer { margin-top: 32px; color: var(--muted); font-size: 14px; display: flex; gap: 16px; flex-wrap: wrap; }