:root {
  --bg: #fbfaf7; --fg: #1d1d1f; --muted: #5f6368; --accent: #1f4fd1; --card: #ffffff; --line: #e6e3dc;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #121314; --fg: #ececec; --muted: #a0a4a8; --accent: #7aa2ff; --card: #1b1c1e; --line: #2c2e31; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 48px 16px 64px; }
a { color: var(--accent); }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 12px; }
h2 { font-size: 1.15rem; margin: 32px 0 8px; }
p, li { color: var(--fg); }
.muted { color: var(--muted); font-size: .95rem; }
.cta { display: inline-block; margin: 20px 0 8px; padding: 12px 20px; border-radius: 10px;
  background: var(--accent); color: #fff; text-decoration: none; font-weight: 600; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px 20px; margin: 16px 0; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); }
footer a { margin-right: 16px; }