:root {
  --bg: #ffffff; --text: #1d1d1f; --muted: #5f6368; --card: #f5f7f8;
  --accent: #0f9d8a; --line: #e2e6e8;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #111315; --text: #f2f4f5; --muted: #a3abb0; --card: #1a1d20; --accent: #3ccdb8; --line: #2a2f33; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header { display: flex; align-items: center; gap: 12px; padding-top: 24px; padding-bottom: 12px; }
header img { width: 40px; height: 40px; border-radius: 10px; }
header a.brand { color: var(--text); font-weight: 600; font-size: 18px; text-decoration: none; }
nav { margin-left: auto; display: flex; gap: 16px; font-size: 14px; }
nav a { color: var(--muted); text-decoration: none; }
nav a:hover { color: var(--accent); }
main { padding-top: 24px; padding-bottom: 40px; }
h1 { font-size: 32px; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
p, li { color: var(--text); }
.muted { color: var(--muted); }
ul { padding-left: 22px; }
a { color: var(--accent); }
.hero { text-align: center; padding: 32px 0 8px; }
.hero img { width: 96px; height: 96px; border-radius: 22px; }
.hero p { max-width: 520px; margin: 8px auto; color: var(--muted); font-size: 18px; }
.cards { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); margin-top: 24px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px; }
.card h3 { margin: 0 0 4px; font-size: 16px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }
footer { padding-top: 16px; padding-bottom: 40px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
footer a { color: var(--muted); }