:root { --bg: #f7f5ef; --ink: #1f2a26; --muted: #5d6b65; --accent: #1f6b57; --line: #ddd8cb; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #14201c; --ink: #e9e6dc; --muted: #a3b0a9; --accent: #7cc9b0; --line: #2c3a35; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink);
  font: 17px/1.65 Georgia, "Noto Serif", serif; }
main { max-width: 720px; margin: 0 auto; padding: 48px 16px 64px; }
h1 { font-size: 2rem; margin: 16px 0 4px; }
h2 { font-size: 1.15rem; margin: 32px 0 8px; color: var(--accent); }
.lead { color: var(--muted); margin-top: 0; }
a { color: var(--accent); }
code { font-size: 0.9em; }
img { border-radius: 16px; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); }