:root { color-scheme: light dark; --ink: #17181d; --muted: #666b7a; --paper: #f5f6f9; --accent: #1f5fd0; --line: #dcdfe8; }
@media (prefers-color-scheme: dark) { :root { --ink: #eceef4; --muted: #9aa0b0; --paper: #090a0e; --accent: #6ba1ff; --line: #23262f; } }
* { box-sizing: border-box; }
body { margin: 0; padding: 48px 20px 64px; background: var(--paper); color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
main { max-width: 680px; margin: 0 auto; }
h1 { font: 700 34px/1.2 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; margin: 0 0 6px; letter-spacing: -0.02em; }
h2 { font: 600 20px/1.3 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; margin: 36px 0 8px; }
p, li { margin: 0 0 12px; }
ul { padding-left: 20px; }
a { color: var(--accent); }
.muted { color: var(--muted); font-size: 15px; }
nav { margin-bottom: 32px; font-size: 15px; }
nav a { margin-right: 16px; }
section[lang] { margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--line); }