:root { --ink: #17222E; --muted: #66727F; --paper: #EDF0F2; --card: #fff; --line: #D5DBE1; --accent: #22704F; }
@media (prefers-color-scheme: dark) { :root { --ink: #E6EBF0; --muted: #9AA6B2; --paper: #11181F; --card: #19222B; --line: #2C3843; --accent: #6FCF9F; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 48px 16px 64px; }
article { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 28px; }
h1 { font-size: 28px; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 18px; margin: 28px 0 8px; }
p, li { color: var(--ink); }
.muted { color: var(--muted); }
a { color: var(--accent); }
nav { margin-bottom: 20px; display: flex; gap: 16px; font-weight: 600; }