:root { --bg: #f6f7f5; --paper: #fff; --ink: #18211e; --muted: #5d6b66; --line: #dde3df; --accent: #0b6b5c; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #111614; --paper: #171d1b; --ink: #e5ebe8; --muted: #9aa8a2; --line: #2a3330; --accent: #4fc2a8; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  padding: 32px max(16px, env(safe-area-inset-left)) 48px; }
main { max-width: 760px; margin: 0 auto; background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: 28px 30px; }
h1 { font-size: 28px; line-height: 1.2; margin: 0 0 6px; }
h2 { font-size: 19px; margin: 26px 0 8px; }
h3 { font-size: 16px; margin: 18px 0 6px; }
p, li { max-width: 68ch; }
.muted { color: var(--muted); font-size: 14px; }
a { color: var(--accent); }
nav { display: flex; gap: 16px; flex-wrap: wrap; margin: 0 0 18px; font-size: 14px; }
hr { border: 0; border-top: 1px solid var(--line); margin: 28px 0; }
code { background: var(--bg); padding: 1px 5px; border-radius: 4px; font-size: 14px; }
footer { max-width: 760px; margin: 16px auto 0; font-size: 13px; color: var(--muted); text-align: center; }