.payment-page{min-height:100vh;background:#fff;padding:0;margin:0}.payment-container{max-width:600px;margin:0 auto;padding:0;min-height:100vh;display:flex;flex-direction:column;background:#fff}.payment-header{display:flex;align-items:center;justify-content:space-between;padding:20px;background:#fff;position:sticky;top:0;z-index:100}.payment-back-btn{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;background-color:#f3f4f6;border:none;cursor:pointer;transition:transform .15s cubic-bezier(.4,0,.2,1),background-color .15s ease;will-change:transform}.payment-back-btn:hover{background-color:#e5e7eb;transform:scale(.98)}.payment-back-btn:active{background-color:#d1d5db;transform:scale(.95)}.payment-back-btn img{width:24px;height:24px}.payment-title{font-family:Inter,sans-serif;color:#111827;font-size:1.25rem;font-weight:600;margin:0;text-align:center;flex:1}.payment-content{flex:1;padding:20px;background:#fff;display:flex;flex-direction:column;gap:20px}@media (max-width: 768px){.payment-content{padding:16px;gap:16px}.payment-title{font-size:18px}.payment-header{padding:16px}}