body{margin:0;padding:0}*{box-sizing:border-box;margin:0;padding:0}body{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);justify-content:center;align-items:center;min-height:100vh;padding:20px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;display:flex}#root{justify-content:center;width:100%;display:flex}.container{width:100%;max-width:440px}.checkout-card{background:#fff;border-radius:20px;padding:32px;animation:.4s ease-out slideUp;box-shadow:0 20px 60px #0000004d}@keyframes slideUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.header{text-align:center;margin-bottom:32px}.logo{color:#fff;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);border-radius:15px;justify-content:center;align-items:center;width:60px;height:60px;margin:0 auto 12px;font-size:32px;font-weight:700;display:flex}.header h1{color:#1a1a1a;font-size:24px;font-weight:700}.payment-details{margin-bottom:32px}.merchant-info{background:#f8f9fa;border-radius:12px;align-items:center;gap:16px;margin-bottom:24px;padding:20px;display:flex}.merchant-icon{background:#fff;border-radius:12px;justify-content:center;align-items:center;width:48px;height:48px;font-size:24px;display:flex}.label{color:#6b7280;text-transform:uppercase;letter-spacing:.5px;margin-bottom:4px;font-size:13px;font-weight:600}.merchant-name{color:#1a1a1a;font-size:18px;font-weight:600}.amount-section{text-align:center;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);border-radius:16px;margin-bottom:24px;padding:24px}.amount-section .label{color:#fffc}.amount{color:#fff;margin-top:8px;font-size:40px;font-weight:700}.details-grid{background:#f8f9fa;border-radius:12px;margin-bottom:24px;padding:20px}.detail-item{border-bottom:1px solid #e5e7eb;justify-content:space-between;padding:12px 0;display:flex}.detail-item:last-child{border-bottom:none}.detail-label{color:#6b7280;font-size:14px}.detail-value{color:#1a1a1a;font-size:14px;font-weight:600}.reference-section{text-align:center;background:#f8f9fa;border-radius:12px;padding:16px}.reference-code{color:#1a1a1a;word-break:break-all;margin-top:4px;font-family:Courier New,monospace;font-size:14px;font-weight:600}.actions{flex-direction:column;gap:12px;margin-bottom:20px;display:flex}.btn-primary{color:#fff;cursor:pointer;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);border:none;border-radius:12px;width:100%;padding:16px;font-size:16px;font-weight:600;transition:transform .2s,box-shadow .2s}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 20px #667eea66}.btn-primary:active{transform:translateY(0)}.btn-secondary{color:#6b7280;cursor:pointer;background:#f3f4f6;border:none;border-radius:12px;width:100%;padding:16px;font-size:16px;font-weight:600;transition:background .2s}.btn-secondary:hover{background:#e5e7eb}.footer{text-align:center;color:#9ca3af;font-size:13px}.loading-spinner{border:4px solid #f3f4f6;border-top-color:#667eea;border-radius:50%;width:50px;height:50px;margin:0 auto 16px;animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.checkout-card p{text-align:center;color:#6b7280;font-size:14px;line-height:1.6}.error-icon,.success-icon,.app-icon{text-align:center;margin-bottom:20px;font-size:60px}.checkout-card h2{text-align:center;color:#1a1a1a;margin-bottom:12px;font-size:24px}.checkout-card>p{margin-bottom:24px}.app-links{flex-direction:column;gap:12px;margin:24px 0;display:flex}.app-store-btn{color:#fff;background:#1a1a1a;border-radius:12px;flex-direction:column;justify-content:center;align-items:center;padding:16px;text-decoration:none;transition:transform .2s;display:flex}.app-store-btn:hover{transform:translateY(-2px)}.app-store-btn span{opacity:.8;font-size:11px}.app-store-btn strong{margin-top:2px;font-size:16px}@media (width<=480px){.checkout-card{padding:24px}.amount{font-size:32px}.header h1{font-size:20px}}