.checkout-container{background:#fff;border:1px solid #e5e7eb;border-radius:12px;box-shadow:0 4px 6px -1px rgba(0,0,0,.1),0 2px 4px -1px rgba(0,0,0,.06);font-family:Helvetica Neue,Helvetica,Arial,sans-serif;margin:40px auto;max-width:800px;padding:40px}.checkout-section{margin-bottom:30px}.checkout-section h2{border-bottom:2px solid #f3f4f6;color:#111827;font-size:1.5rem;font-weight:600;margin-bottom:25px;padding-bottom:15px}.summary-list{background:#f9fafb;border-radius:8px;list-style:none;margin:0;padding:20px}.summary-item{border-bottom:1px solid #e5e7eb;color:#374151;display:flex;justify-content:space-between;padding:10px 0}.summary-item:last-child{border-bottom:none}.checkout-total{color:#111827;font-size:1.25rem;font-weight:700;margin-top:15px;text-align:right}.api-form{flex-direction:column}.api-form,.form-row{display:flex;gap:20px}.form-group{display:flex;flex-direction:column;width:100%}.half-width{flex:1}.form-group label{color:#374151;display:block;font-size:.9rem;font-weight:600;margin-bottom:8px}.form-group input{background-color:#fff;border:1px solid #d1d5db;border-radius:6px;box-sizing:border-box;color:#111827;font-size:1rem;line-height:1.5;padding:12px 16px;transition:border-color .15s ease-in-out,box-shadow .15s ease-in-out;width:100%}.form-group input:focus{border-color:#2563eb;box-shadow:0 0 0 3px rgba(37,99,235,.2);outline:none}.form-group input.input-error{background-color:#fef2f2;border-color:#dc2626}.error-msg{color:#dc2626;font-size:.85rem;margin-top:5px;min-height:1.2em}.cta-button{background-color:#111827;border:none;border-radius:6px;color:#fff;cursor:pointer;display:inline-block;font-size:1rem;font-weight:600;margin-top:10px;padding:14px 20px;text-align:center;transition:background-color .2s;width:100%}.cta-button:hover{background-color:#374151}.cta-button:disabled{background-color:#9ca3af;cursor:not-allowed}