* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif; color: #0f172a; background: #ffffff; line-height: 1.6; }

.container { width: 100%; max-width: 960px; margin: 0 auto; padding: 0 16px; }
.site-header { border-bottom: 1px solid #e2e8f0; background: #fff; position: sticky; top: 0; z-index: 100; }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.brand { font-weight: 700; color: #0f172a; text-decoration: none; }
.nav a { margin-left: 14px; color: #334155; text-decoration: none; padding: 6px 8px; border-radius: 8px; }
.nav a[aria-current="page"], .nav a:hover { background: #f1f5f9; color: #0f172a; }

.hero { padding: 56px 0 24px; text-align: center; }
.hero h1 { font-size: 40px; margin: 0 0 8px; }
.subtitle { color: #475569; margin: 0 0 20px; }
.cta-row { display: inline-flex; gap: 12px; }
.button { display: inline-block; padding: 10px 16px; border: 1px solid #cbd5e1; border-radius: 10px; text-decoration: none; color: #0f172a; background: #fff; }
.button.primary { background: #0ea5e9; border-color: #0ea5e9; color: #fff; }
.button:hover { filter: brightness(0.96); }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; padding: 16px 0 40px; }
.card { border: 1px solid #e2e8f0; border-radius: 12px; padding: 16px; background: #ffffff; }
.card h2 { margin: 0 0 8px; font-size: 20px; }
.link { color: #0ea5e9; text-decoration: none; }
.link:hover { text-decoration: underline; }

.content { padding: 32px 0; }
.content h1 { margin-top: 0; }
.content h2 { margin-top: 24px; }
.content a { color: #0ea5e9; }

.site-footer { border-top: 1px solid #e2e8f0; margin-top: 40px; background: #fff; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; padding: 16px 0; }
.footer-nav a { margin-left: 12px; color: #475569; text-decoration: none; }
.footer-nav a:hover { text-decoration: underline; }

@media (max-width: 640px) {
  .header-inner { flex-wrap: wrap; gap: 8px; }
  .nav { width: 100%; display: flex; overflow-x: auto; padding-bottom: 6px; }
  .nav a { margin-left: 8px; }
  .hero h1 { font-size: 28px; }
}