:root {
  --bg: #fbfaf8; --text: #1d1d1f; --muted: #5f6368; --border: #e3e1dc; --accent: #0b6e5f;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #121316; --text: #e8e6e3; --muted: #9aa0a6; --border: #2c2f35; --accent: #4fc3ad; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 56px 16px 80px; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 1.2rem; margin: 36px 0 8px; }
p, li { overflow-wrap: anywhere; }
.lead { color: var(--muted); font-size: 1.1rem; margin-top: 0; }
a { color: var(--accent); }
footer { margin-top: 56px; padding-top: 16px; border-top: 1px solid var(--border); color: var(--muted); font-size: 0.9rem; }