:root { --bg: #f4f8f7; --text: #1b2624; --muted: #64706d; --accent: #138a72; --card: #ffffff; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #121917; --text: #e9f1ef; --muted: #9fb0ac; --accent: #4fd1b0; --card: #1b2422; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.6 -apple-system, "Segoe UI", Roboto, Arial, sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
h1 { font-size: 26px; line-height: 1.25; margin: 0 0 4px; }
h2 { font-size: 18px; margin: 28px 0 8px; }
.sub { color: var(--muted); margin: 0 0 4px; }
.logo { width: 72px; height: 72px; margin-bottom: 12px; border-radius: 16px; }
a { color: var(--accent); }
ul { padding-left: 20px; }