:root{color-scheme:light;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:#f4f5f7;color:#1a1d21}.checkout{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:16px}.checkout__card{width:100%;max-width:420px;background:#fff;border-radius:12px;box-shadow:0 1px 3px #00000014,0 8px 24px #0000000f;padding:28px 24px}.checkout__brand{font-size:13px;font-weight:600;letter-spacing:.02em;color:#5b6b7a;text-transform:uppercase;margin-bottom:20px;text-align:center}.checkout__amount{display:flex;flex-direction:column;align-items:center;margin-bottom:20px}.checkout__amount-label{font-size:13px;color:#6b7684}.checkout__amount-value{font-size:32px;font-weight:700;color:#111827}.checkout__card-fields{min-height:90px;border:1px solid #d7dbe0;border-radius:8px;padding:12px;margin-bottom:16px}.checkout__pay-btn{width:100%;padding:12px 16px;font-size:16px;font-weight:600;color:#fff;background:#2453ff;border:none;border-radius:8px;cursor:pointer;margin-bottom:10px}.checkout__pay-btn:disabled{background:#a9b6c9;cursor:not-allowed}.checkout__cancel-btn{width:100%;padding:10px 16px;font-size:14px;color:#5b6b7a;background:transparent;border:1px solid transparent;border-radius:8px;cursor:pointer}.checkout__cancel-btn:hover{text-decoration:underline}.checkout__error{min-height:18px;color:#c0362c;font-size:13px;margin-bottom:10px}.checkout__message{text-align:center}.checkout__message h1{font-size:20px;margin:0 0 12px}.checkout__message p{font-size:14px;color:#4b5563;line-height:1.5}.checkout__message--success h1{color:#0f8a3e}.checkout__message--error h1{color:#c0362c}.checkout__spinner{margin:16px auto 0;width:28px;height:28px;border-radius:50%;border:3px solid #e2e5e9;border-top-color:#2453ff;animation:checkout-spin .8s linear infinite}@keyframes checkout-spin{to{transform:rotate(360deg)}}