:root {
  color-scheme: light dark;
  --bg: #f8fafc;
  --fg: #0f172a;
  --muted: #475569;
  --card: #ffffff;
  --border: #e2e8f0;
  --primary: #2563eb;
  --primary-fg: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #020617;
    --fg: #f8fafc;
    --muted: #94a3b8;
    --card: #0f172a;
    --border: #1e293b;
  }
}
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
  background: var(--bg);
  color: var(--fg);
}
header,
main {
  max-width: 48rem;
  margin: 0 auto;
  padding: 1.5rem;
}
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
header a.brand {
  color: inherit;
  text-decoration: none;
  font-weight: 700;
}
h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  letter-spacing: -0.03em;
  text-align: center;
}
p.lead {
  text-align: center;
  color: var(--muted);
  font-size: 1.125rem;
  line-height: 1.6;
}
.actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 2rem;
}
a.button,
button.button {
  display: inline-flex;
  align-items: center;
  border: 0;
  border-radius: 0.5rem;
  padding: 0.75rem 1.25rem;
  text-decoration: none;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  background: var(--primary);
  color: var(--primary-fg);
}
a.ghost,
button.ghost {
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--border);
}
.note {
  margin-top: 2.5rem;
  padding: 1rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  background: var(--card);
  color: var(--muted);
  font-size: 0.95rem;
}