:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1c1c1e;
  --muted: #6b6b70;
  --border: rgba(60, 60, 67, 0.18);
  --accent: #007aff;
  --surface: #f7f7f8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --fg: #f2f2f7;
    --muted: #9a9aa0;
    --border: rgba(84, 84, 88, 0.55);
    --accent: #0a84ff;
    --surface: #1c1c1e;
  }
}
* {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--bg);
  color: var(--fg);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif;
  line-height: 1.5;
}
main {
  width: 100%;
  max-width: 26rem;
  text-align: center;
}
.logo {
  font-size: 3rem;
  line-height: 1;
  margin-bottom: 1rem;
}
h1 {
  font-size: 1.5rem;
  margin: 0 0 0.5rem;
}
p {
  margin: 0.5rem 0;
  color: var(--muted);
}
p.lead {
  color: var(--fg);
}
.card {
  margin-top: 1.5rem;
  padding: 1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  color: var(--fg);
  font-size: 0.95rem;
}
.foot {
  margin-top: 2rem;
  font-size: 0.85rem;
}
a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}