body{background:linear-gradient(135deg,#7b2ff7,#ff5edf);display:flex;align-items:center;justify-content:center;height:100vh;font-family:system-ui}
.box{background:#fff;padding:24px;border-radius:16px;width:100%;max-width:420px}
input,textarea,select{width:100%;margin-bottom:10px;padding:10px}
#card-element{border:1px solid #ccc;padding:12px;border-radius:8px}
button{width:100%;padding:14px;background:#7b2ff7;color:#fff;border:none;border-radius:8px}
#total{font-weight:bold;margin-bottom:10px}