body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background-color:#f4f7f6;color:#333;margin:0}#app{max-width:1200px;margin:0 auto;padding:20px}header{text-align:center;margin-bottom:40px;color:#2c3e50}.back-button{background-color:#3498db;color:#fff;border:none;padding:10px 20px;border-radius:5px;cursor:pointer;font-size:16px;margin-bottom:20px;transition:background-color .3s}.back-button:hover{background-color:#2980b9}.grid-container{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px}.card{background-color:#fff;border-radius:8px;box-shadow:0 4px 8px #0000001a;overflow:hidden;transition:transform .2s,box-shadow .2s;cursor:pointer;display:flex;flex-direction:column}.card:hover{transform:translateY(-5px);box-shadow:0 8px 16px #00000026}.card-img-top{width:100%;height:150px;object-fit:cover}.card-body{padding:15px;text-align:center;flex-grow:1}.card-title{margin:0;font-size:1.1em}.card-text{color:#555;font-size:.9em}.product-detail-container{background:#fff;padding:30px;border-radius:10px;box-shadow:0 4px 12px #0000001a}.product-detail{display:flex;gap:30px}.product-detail-img{max-width:300px;height:auto;border-radius:8px;object-fit:cover}.product-detail-info h2{margin-top:0;color:#2c3e50}.product-detail-info .price{font-size:1.5em;color:#e74c3c;margin-bottom:20px}.product-detail-info .description{line-height:1.6}.options-section{margin-top:30px}.option-group{margin-bottom:20px;border-top:1px solid #eee;padding-top:15px}.option-group h4{margin-top:0;color:#34495e}.option-list{list-style:none;padding:0}.option-list li{background-color:#ecf0f1;padding:8px 12px;border-radius:4px;margin-bottom:5px}