:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --text: #202124;
  --muted: #5f6368;
  --border: #e3e3e3;
  --accent: #c5221f;
  --link: #1a73e8;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17181a;
    --surface: #202124;
    --text: #e8eaed;
    --muted: #9aa0a6;
    --border: #3c4043;
    --accent: #f28b82;
    --link: #8ab4f8;
  }
}

* { 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: 760px; margin: 0 auto; padding: 56px 16px 32px; }
a { color: var(--link); }
h1, h2 { line-height: 1.2; }

.hero { text-align: center; }
.logo { display: block; margin: 0 auto 16px; }
.hero h1 { margin: 0; font-size: clamp(2rem, 6vw, 2.8rem); letter-spacing: -0.02em; }
.tagline { max-width: 34rem; margin: 12px auto 0; color: var(--muted); font-size: 1.15rem; }
.status {
  display: inline-block;
  margin: 24px 0 0;
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 4px 14px;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 600;
}

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin-top: 48px; }
.card { border: 1px solid var(--border); border-radius: 12px; background: var(--surface); padding: 20px; }
.card h2 { margin: 0 0 8px; font-size: 1.1rem; }
.card p { margin: 0; color: var(--muted); }

.features, .data-use { margin-top: 40px; }
.features h2, .data-use h2 { font-size: 1.25rem; }
.features li, .data-use li { margin: 6px 0; }
.data-use code { font-size: 0.9em; }

.policy h2 { margin-top: 2em; }
.policy code { font-size: 0.9em; overflow-wrap: anywhere; }

footer {
  max-width: 760px;
  margin: 0 auto;
  border-top: 1px solid var(--border);
  padding: 20px 16px 40px;
  color: var(--muted);
  font-size: 0.875rem;
}
footer nav { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 8px; }