* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", sans-serif; background: #0d1117; color: #e6edf3; }
a { color: #58a6ff; }
.site-header { background: #161b22; border-bottom: 1px solid #30363d; position: sticky; top: 0; }
.nav { max-width: 960px; margin: 0 auto; padding: 12px 16px; display: flex; justify-content: space-between; align-items: center; }
.brand { font-weight: 700; font-size: 1.2em; color: #fff; text-decoration: none; }
.nav-links a { margin-left: 16px; color: #e6edf3; text-decoration: none; }
main { max-width: 960px; margin: 0 auto; padding: 16px; }
.hero { padding: 32px 0 16px; }
.hero h1 { margin: 0 0 8px; font-size: 2em; }
.tagline { color: #8b949e; line-height: 1.6; }
.section { padding: 24px 0; }
.section-sub { color: #8b949e; }
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.card { background: #161b22; border: 1px solid #30363d; border-radius: 12px; padding: 20px; }
.card h3 { margin-top: 0; }
.card p { color: #8b949e; line-height: 1.5; }
.price { font-size: 1.4em; font-weight: 700; margin: 12px 0; }
.btn { display: inline-block; border: 0; border-radius: 8px; padding: 10px 18px; cursor: pointer; font-size: 1em; text-decoration: none; }
.btn-primary { background: #238636; color: #fff; }
.btn-ghost { background: transparent; color: #e6edf3; border: 1px solid #30363d; margin-left: 8px; }
.checkout-card { max-width: 520px; }
.checkout-card label { display: block; margin: 12px 0; }
.checkout-card input { width: 100%; margin-top: 6px; padding: 10px; border-radius: 8px; border: 1px solid #30363d; background: #0d1117; color: #e6edf3; font-size: 1em; }
.note { color: #8b949e; font-size: 0.9em; line-height: 1.5; }
.error { color: #f85149; }
.warning { color: #d29922; border: 1px solid #d29922; border-radius: 8px; padding: 12px; }
.status-line { font-weight: 700; font-size: 1.2em; }
.faq-item { background: #161b22; border: 1px solid #30363d; border-radius: 12px; padding: 16px; margin-bottom: 12px; }
.faq-item p { color: #8b949e; line-height: 1.5; }
.site-footer { border-top: 1px solid #30363d; padding: 24px 16px; text-align: center; color: #8b949e; }
.disclaimer { font-size: 0.85em; }