:root{--primary-color:#3498db;--secondary-color:#2ecc71;--error-color:#e74c3c;--text-color:#333;--light-bg:#f5f5f5;--border-color:#ddd;--shadow:0 2px 5px #0000001a}*{box-sizing:border-box;margin:0;padding:0}body{color:var(--text-color);background-color:var(--light-bg);font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;line-height:1.6}.app{max-width:1200px;margin:0 auto;padding:2rem}h1,h2,h3{margin-bottom:1rem}.form-group{margin-bottom:1.5rem}.form-row{gap:1rem;display:flex}label{margin-bottom:.5rem;font-weight:600;display:block}input{border:1px solid var(--border-color);border-radius:4px;width:100%;padding:.8rem;font-size:1rem}.error{color:var(--error-color);margin-top:.3rem;font-size:.85rem}.btn-primary{background-color:var(--primary-color);color:#fff;cursor:pointer;border:none;border-radius:4px;padding:.8rem 1.5rem;font-size:1rem;transition:background-color .2s}.btn-primary:hover{background-color:#2980b9}.login-page{justify-content:center;align-items:center;min-height:100vh;display:flex}.login-container{box-shadow:var(--shadow);background:#fff;border-radius:8px;width:100%;max-width:400px;padding:2rem}.item-selection-page{padding:2rem 0}.items-container{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1.5rem;margin:2rem 0;display:grid}.item-card{box-shadow:var(--shadow);cursor:pointer;background:#fff;border-radius:8px;padding:1.5rem;transition:all .2s}.item-card:hover{transform:translateY(-5px);box-shadow:0 5px 15px #0000001a}.item-card.selected{border:2px solid var(--primary-color);background-color:#3498db1a}.action-buttons{justify-content:flex-end;margin-top:2rem;display:flex}.payment-page{padding:2rem 0}.order-summary{box-shadow:var(--shadow);background:#fff;border-radius:8px;margin-bottom:2rem;padding:1.5rem}.order-items{margin:1rem 0}.order-item{border-bottom:1px solid var(--border-color);justify-content:space-between;padding:.5rem 0;display:flex}.order-total{text-align:right;margin-top:1rem;font-size:1.1rem}.credit-card-form{box-shadow:var(--shadow);background:#fff;border-radius:8px;padding:1.5rem}.payment-status{text-align:center;box-shadow:var(--shadow);background:#fff;border-radius:8px;margin:2rem 0;padding:2rem}.payment-status.success{color:var(--secondary-color)}.payment-status.error{color:var(--error-color)}.loading-spinner{border:4px solid #0000001a;border-left-color:var(--primary-color);border-radius:50%;width:36px;height:36px;margin:1rem auto;animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media (width<=768px){.app{padding:1rem}.form-row{flex-direction:column;gap:0}.form-group{margin-bottom:1rem}.login-container,.item-selection-page,.payment-page,.order-summary,.credit-card-form,.payment-status{padding:1rem}.items-container{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:1rem}.action-buttons{flex-direction:column;align-items:stretch}.action-buttons button{margin-top:.5rem}.table-responsive{-webkit-overflow-scrolling:touch;overflow-x:auto}.review-items-page .card{margin-bottom:1rem}.review-items-page .d-flex{flex-direction:column;align-items:stretch!important}.review-items-page .d-flex>*{margin-bottom:.5rem}.table thead{display:none}.table tbody td{text-align:left;border:none;width:100%;display:block}.table tbody tr{border:1px solid var(--border-color);margin-bottom:1rem;padding:.5rem;display:block}.table tbody td:before{content:attr(data-label);margin-bottom:.3rem;font-weight:700;display:block}}