:root{
  --bg:#ffffff;
  --text:#1f2937;
  --brand:#2563eb;
  --brand-2:#10b981;
  --muted:#f3f4f6;
  --danger:#ef4444;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color:var(--text);
  background: var(--bg);
}
.container{max-width:1100px;margin:0 auto;padding:16px}
.topbar{background:linear-gradient(90deg,var(--brand),var(--brand-2));color:#fff}
.topbar .container{display:flex;align-items:center;justify-content:space-between}
.logo{font-weight:800;letter-spacing:.5px}
.nav a{color:#fff;text-decoration:none;margin-left:16px;font-weight:600}
.nav a:hover{opacity:.9}
.hero{background:linear-gradient(180deg,var(--muted),#fff);padding:56px 0}
.hero h1{font-size:38px;margin:0 0 8px}
.hero p{max-width:680px;opacity:.9}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{
  background:#fff;border:1px solid #e5e7eb;border-radius:16px;padding:16px;
  box-shadow:0 6px 18px rgba(0,0,0,.04);
  display:flex;flex-direction:column;justify-content:space-between
}
.card h3{margin:8px 0 4px}
.price{font-size:20px;font-weight:800;margin:8px 0}
.btn{
  display:inline-block;border:none;border-radius:12px;padding:12px 16px;
  background:var(--brand);color:#fff;font-weight:700;cursor:pointer;
}
.btn.alt{background:var(--brand-2)}
.btn.danger{background:var(--danger)}
.btn:disabled{opacity:.6;cursor:not-allowed}
.kicker{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:#6b7280}
.section{padding:40px 0;border-top:1px solid #e5e7eb}
.footer{background:#0f172a;color:#cbd5e1;margin-top:32px}
.footer a{color:#93c5fd}
.row{display:flex;gap:16px;align-items:center}
.badges{display:flex;gap:8px;flex-wrap:wrap}
.badge{background:var(--muted);padding:6px 10px;border-radius:999px;font-size:12px}
.cart-pill{background:#fff;color:#0f172a;border-radius:999px;padding:6px 10px;font-weight:700}
.cart-table{width:100%;border-collapse:collapse;margin:8px 0}
.cart-table th,.cart-table td{border-bottom:1px solid #e5e7eb;padding:8px;text-align:left}
.input{width:100%;padding:12px;border:1px solid #e5e7eb;border-radius:10px}
label{font-size:14px;color:#374151}
.notice{background:#ecfeff;border:1px solid #a5f3fc;padding:12px;border-radius:10px}
@media (max-width:900px){
  .grid{grid-template-columns:1fr 1fr}
  .hero h1{font-size:32px}
}
@media (max-width:640px){
  .grid{grid-template-columns:1fr}
  .topbar .container{flex-direction:column;gap:8px}
}