:root {
  --background: #f4f6f8;
  --foreground: #122033;
  --surface: #ffffff;
  --border: #d7dee6;
  --primary: #1b365d;
  --primary-foreground: #f8fafc;
  --radius: 0.5rem;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--background); color: var(--foreground); font-family: "Segoe UI", Inter, ui-sans-serif, system-ui, sans-serif; }
a { color: var(--primary); text-decoration: none; }
.wrap { width: min(72rem, calc(100% - 2rem)); margin: 0 auto; }
.site-header, .site-footer { background: var(--surface); border-color: var(--border); }
.site-header { border-bottom: 1px solid var(--border); }
.site-footer { border-top: 1px solid var(--border); margin-top: 3rem; }
.bar { display: flex; flex-wrap: wrap; gap: 0.75rem 1.25rem; align-items: center; justify-content: space-between; padding: 1rem 0; }
.brand { font-weight: 650; color: var(--foreground); }
.nav, .auth { display: flex; flex-wrap: wrap; gap: 0.75rem 1rem; }
.nav a[aria-current="page"] { font-weight: 650; }
.button, .auth .button {
  display: inline-flex; align-items: center; height: 2.5rem; padding: 0 1rem;
  border-radius: var(--radius); background: var(--primary); color: var(--primary-foreground); font-size: 0.875rem; font-weight: 600;
}
main { padding: 2rem 0 3rem; }
.kicker { color: var(--primary); font-weight: 600; font-size: 0.875rem; }
h1 { font-size: clamp(2rem, 5vw, 3rem); letter-spacing: -0.03em; margin: 0.35rem 0 1rem; }
.lead { font-size: 1.125rem; color: rgb(18 32 51 / 0.75); max-width: 46rem; }
.muted { color: rgb(18 32 51 / 0.6); font-size: 0.875rem; }
.notice, .card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem 1.1rem;
}
.notice { margin: 1.5rem 0; }
.grid { display: grid; gap: 1rem; margin-top: 1.5rem; }
@media (min-width: 48rem) { .grid { grid-template-columns: 1fr 1fr; } }
.card h2 { margin: 0 0 0.4rem; font-size: 1.05rem; }
.card p, .site-footer p { margin: 0; color: rgb(18 32 51 / 0.72); font-size: 0.95rem; }