:root {
  --bg: #ffffff;
  --fg: #1f1f1f;
  --muted: #5f6368;
  --line: #dadce0;
  --accent: #1a73e8;
  --card: #f8f9fa;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #202124;
    --fg: #e8eaed;
    --muted: #9aa0a6;
    --line: #3c4043;
    --accent: #8ab4f8;
    --card: #292a2d;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding-top: 20px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; color: var(--fg); text-decoration: none; font-weight: 600; font-size: 18px; }
.brand img { width: 28px; height: 28px; border-radius: 6px; }
nav { display: flex; gap: 16px; flex-wrap: wrap; font-size: 15px; }
nav a { text-decoration: none; }
nav a[aria-current="page"] { color: var(--fg); font-weight: 600; }
h1 { font-size: 2rem; line-height: 1.2; margin: 32px 0 8px; }
h2 { font-size: 1.25rem; margin: 32px 0 8px; }
.lead { font-size: 1.15rem; color: var(--muted); margin-top: 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px 20px; margin: 16px 0; }
.cta { display: inline-block; background: var(--accent); color: var(--bg); padding: 10px 20px; border-radius: 999px; text-decoration: none; font-weight: 600; }
.note { color: var(--muted); font-size: 14px; }
footer { margin-top: 48px; padding-top: 16px; padding-bottom: 32px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
footer nav { margin-bottom: 8px; }
ul { padding-left: 1.2em; }