/* Reset & base */
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Inter', sans-serif; line-height: 1.6; color: #222; background: #fff; }

.wrap { max-width: 1100px; margin: 0 auto; padding: 1rem; }

/* Header */
.site-header { background: #0a1a2f; color: #fff; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; }
.site-header img { height: 40px; }
.site-nav a { color: #fff; text-decoration: none; margin-left: 1rem; font-weight: 600; }
.site-nav a:hover { text-decoration: underline; }

/* Notice */
.notice { background: #f0f4ff; padding: .75rem 0; text-align: center; font-weight: 600; color: #0a1a2f; }

/* Hero */
.hero { padding: 2rem 0; text-align: center; }
.hero h1 { font-size: 2rem; margin-bottom: 1rem; }

/* Grid */
.grid { display: flex; flex-wrap: wrap; gap: 1rem; margin: 2rem 0; }
.card { flex: 1 1 30%; background: #fafafa; padding: 1rem; border: 1px solid #ddd; border-radius: 6px; }
.card h3 { margin-bottom: .5rem; }

/* Footer */
.site-footer { background: #0a1a2f; color: #fff; text-align: center; padding: 1rem 0; margin-top: 2rem; }

/* Responsive */
@media (max-width: 768px) {
  .grid { flex-direction: column; }
  .card { flex: 1 1 100%; }
  .site-header .wrap { flex-direction: column; align-items: flex-start; }
  .site-nav { margin-top: .5rem; }
  .site-nav a { margin: 0 .5rem 0 0; }
}