:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --text: #1c1c1a;
  --muted: #5d5d58;
  --accent: #2f6fdb;
  --border: #e3e3de;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141413;
    --surface: #1d1d1b;
    --text: #ecece8;
    --muted: #a3a39d;
    --accent: #7aa7ff;
    --border: #2e2e2b;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 16px 64px;
}
header { margin-bottom: 32px; }
.brand { font-size: 28px; font-weight: 700; letter-spacing: -0.02em; margin: 0; }
.tagline { color: var(--muted); margin: 4px 0 0; }
section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 16px;
}
h2 { font-size: 18px; margin: 0 0 8px; }
p, li { margin: 0 0 8px; }
ul { padding-left: 20px; margin: 0; }
a { color: var(--accent); }
footer { color: var(--muted); font-size: 14px; margin-top: 32px; }