:root{--bg: #ffffff;--panel-border: #ececec;--text: #1f2937;--muted: #6b7280;--input-border: #dfdfdf;--blue: #0074e8;--blue-hover: #0063c8;--font-base: 16px}*,*:before,*:after{box-sizing:border-box}html,body{margin:0;padding:0;background:#fff;color:var(--text);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:var(--font-base);line-height:1.5;overflow-x:hidden;max-width:100vw;-webkit-text-size-adjust:100%}#app{min-height:100vh;max-width:100vw;overflow-x:hidden}.checkout-container{display:grid;grid-template-columns:1fr;min-height:100vh;max-width:100%;overflow:hidden}@media (min-width: 1024px){.checkout-container{grid-template-columns:1fr 1fr;max-width:1200px;margin:0 auto}}.order-summary{border-right:1px solid var(--panel-border);padding:24px 20px;display:flex;flex-direction:column;justify-content:space-between}@media (min-width: 768px){.order-summary{padding:32px 40px}}.summary-top{max-width:100%}.summary-head{display:flex;align-items:center;gap:14px;margin-bottom:24px}.back-btn{width:32px;height:32px;border-radius:50%;border:1px solid var(--panel-border);color:#6f7683;display:flex;align-items:center;justify-content:center;font-size:14px;background:transparent;cursor:pointer}.brand{font-size:18px;font-weight:600}.brand-row{display:flex;align-items:center;gap:8px;font-weight:600}.test-mode{font-size:11px;font-weight:700;color:#8a5900;background:#ffd174;border-radius:4px;padding:2px 6px}.pay-label{color:#5f6875;font-size:14px;margin-bottom:4px}.pay-amount{font-size:32px;line-height:1.2;font-weight:800;margin:0 0 24px}@media (min-width: 768px){.pay-amount{font-size:40px}}.item-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:8px}.item-left{display:flex;align-items:center;gap:12px}.book{width:40px;height:48px;border:1px solid #dfdfdf;border-radius:4px;background:linear-gradient(180deg,#fff,#f7f7f7)}.item-name{font-size:14px;font-weight:600}.item-desc{margin-top:2px;color:#7a8391;font-size:12px}.item-price{font-weight:600;font-size:14px}.totals{margin-top:16px;border-top:1px solid var(--panel-border);border-bottom:1px solid var(--panel-border)}.total-line{display:flex;justify-content:space-between;padding:10px 0;font-size:13px;border-bottom:1px solid var(--panel-border)}.total-line:last-child{border-bottom:0}.total-line strong{font-size:15px}.tax-muted{color:#9ca3af}.summary-footer{margin-top:24px;color:#8d95a3;font-size:12px}.summary-footer span{margin:0 6px}.payment-form{padding:24px 20px}@media (min-width: 768px){.payment-form{padding:32px 40px}}.form-title{font-size:20px;margin:0 0 20px;font-weight:700}@media (min-width: 768px){.form-title{font-size:24px}}.form-group{margin-bottom:16px}.form-group>label{display:block;margin-bottom:6px;font-size:13px;font-weight:600}input[type=email],input[type=text]{width:100%;height:44px;border:1px solid var(--input-border);border-radius:8px;font-size:15px;padding:0 12px;outline:none;color:#111827;touch-action:manipulation;-webkit-tap-highlight-color:transparent}input::placeholder{color:#b7bcc6}input:focus{border-color:#9abef0;box-shadow:0 0 0 3px #0074e81a}.card-block{border:1px solid var(--input-border);border-radius:8px;overflow:hidden;background:#fff}.card-top-row{display:flex;align-items:center;border-bottom:1px solid var(--input-border)}.card-top-row input{border:0;border-radius:0;flex:1}.card-icons{display:flex;gap:6px;padding-right:10px}.mini-card{font-size:8px;line-height:1;border-radius:3px;padding:4px;color:#fff;font-weight:700}.mini-card.visa{background:#1a1f71}.mini-card.mc{background:#ff5f00}.mini-card.amex{background:#2e77bb}.card-bottom-row{display:grid;grid-template-columns:1fr 1fr}.card-bottom-row input{border:0;border-radius:0}.card-bottom-row input:first-child{border-right:1px solid var(--input-border)}.billing-block{border:1px solid var(--input-border);border-radius:8px;overflow:hidden}.country-select{height:44px;padding:0 12px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--input-border);font-size:14px}.chevron{font-size:16px;color:#111827}.billing-block input{border:0;border-radius:0}.manual-link{display:inline-block;margin-top:8px;font-size:13px;color:#6b7280}.save-info-box{border:1px solid var(--input-border);border-radius:8px;padding:12px 14px;display:flex;align-items:flex-start;gap:10px;margin:14px 0 18px}.save-info-box input[type=checkbox]{margin-top:2px;width:16px;height:16px}.save-info-box label{display:flex;flex-direction:column;gap:2px;margin:0;font-size:13px;font-weight:500}.save-info-box label span{color:#9ca3af;font-size:12px}.pay-button{width:100%;height:48px;border:0;border-radius:8px;background:var(--blue);color:#fff;font-size:15px;font-weight:600;cursor:pointer}.pay-button:hover:not(:disabled){background:var(--blue-hover)}.pay-button:disabled{opacity:.65;cursor:not-allowed}.button-loading,.pay-button.loading .button-text{display:none}.pay-button.loading .button-loading{display:inline-flex}.spinner{width:20px;height:20px;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.error-message{min-height:16px;margin-top:4px;color:#d14343;font-size:12px}.payment-success{display:none;margin-top:12px;align-items:center;gap:8px;font-size:14px;color:#059669;font-weight:600}.payment-success.show{display:inline-flex}.payment-success svg{width:20px;height:20px}.alert{padding:10px 12px;border-radius:8px;margin-bottom:12px;font-size:13px}.alert-error{background:#fff1f1;color:#c53333;border:1px solid #ffd4d4}.product-selector{display:flex;flex-direction:column;gap:10px}.product-option{display:flex;align-items:flex-start;gap:12px;padding:12px;border:1px solid var(--input-border);border-radius:8px;cursor:pointer;transition:border-color .2s,background .2s}.product-option:hover{background:#f9fafb}.product-option.selected{border-color:var(--blue);background:#f0f7ff}.product-radio{width:20px;height:20px;border:2px solid var(--input-border);border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:2px}.product-option.selected .product-radio{border-color:var(--blue)}.radio-inner{width:10px;height:10px;border-radius:50%;background:transparent}.product-option.selected .radio-inner{background:var(--blue)}.product-info{flex:1}.product-header{display:flex;justify-content:space-between;align-items:center}.product-name{font-weight:600;font-size:14px}.product-description{margin:4px 0 0;font-size:12px;color:var(--muted)}.summary-title{font-size:16px;font-weight:700;margin:0 0 16px}.divider{height:1px;background:var(--panel-border);margin:16px 0}.summary-row{display:flex;justify-content:space-between;font-size:15px;font-weight:600}.test-card-notice{display:flex;align-items:center;gap:8px;margin-top:16px;padding:10px 12px;background:#fef3c7;border-radius:6px;font-size:12px;color:#92400e}.test-card-notice svg{width:16px;height:16px;flex-shrink:0}.pay-button.hidden{display:none}