main{background-color:white;display:grid;grid-template-columns:repeat(4,1fr);gap:30px;margin-left:auto;margin-right:auto;min-height:600px;justify-items:center;padding:30px;max-width:1400px}.main-container{position:relative;width:100%;min-height:600px;overflow:hidden;display:flex;justify-content:center}.categories{width:100%;display:flex;justify-content:center;flex-wrap:wrap;margin-top:30px}.categories button{font-weight:bold;background-color:transparent;border:none;color:#000;padding:2px 2px;margin-right:10px;cursor:pointer;font-size:20px;transition:.3s ease}.categories button:hover{border:1px solid #000;border-radius:5px;padding:5px}.categories button.active{border:1px solid #000;border-radius:5px}.card{width:100%;max-width:300px;background-color:#fff;border-radius:10px;overflow:hidden;text-align:center;padding:15px;opacity:0;transform:translateY(20px);transition:opacity .5s ease,transform .5s ease;display:flex;flex-direction:column}.card.visible{opacity:1;transform:translateY(0)}.card.hidden{opacity:0;visibility:hidden;display:none}.card h3{font-size:18px;font-weight:bold;margin:10px 0 5px}.card p{color:#666;font-size:14px;margin-bottom:10px}.card .price{font-size:16px;font-weight:bold;margin-bottom:10px}.image-container{position:relative;width:100%;height:0;overflow:hidden;padding-bottom:100%}.photo-front,.photo-back{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:opacity .4s ease}.photo-back{opacity:0}.image-container:hover .photo-front{opacity:0}.image-container:hover .photo-back{opacity:1}.buttons{margin-top:10px}.buttons button{padding:10px 20px;border:none;border-radius:5px;cursor:pointer;margin:5px}.buttons .details{background-color:white;color:black;border:1px solid black;transition:all .3s ease}.buttons .add-to-cart{background-color:black;color:white;transition:all .3s ease}.buttons .details:hover,.buttons .add-to-cart:hover{transform:translateY(-3px);box-shadow:0 5px 20px rgba(0,0,0,0.1)}.add-to-cart.sold-out{background-color:#ccc;color:#666;cursor:not-allowed;transform:none}.add-to-cart.sold-out:hover{background-color:#ccc;transform:none}#cart{position:fixed;right:20px;top:60px;background-color:white;border:1px solid #ddd;border-radius:5px;margin-top:15px;padding:15px;padding-bottom:50px;width:300px;box-shadow:0 2px 5px rgba(0,0,0,0.2)}#cart.hidden{display:hidden}#cart-items{list-style:none;padding:0;margin:0}#cart-items li{display:flex;justify-content:space-between;padding:5px 0}#cart button{position:absolute;padding:10px 20px;border:none;border-radius:5px;background:black;color:white;font-size:11px;cursor:pointer}#cart #clear-cart{bottom:10px;left:10px}#cart #checkout{bottom:10px;right:10px}.size-selector-placeholder{height:40px}@media(max-width:1400px){main{grid-template-columns:repeat(3,1fr);gap:25px;padding:25px}}@media(max-width:1000px){main{grid-template-columns:repeat(2,1fr);gap:20px;padding:20px}}@media(max-width:600px){main{grid-template-columns:repeat(1,1fr);gap:15px;padding:15px}.categories button{font-size:16px;margin-bottom:5px}.card{width:100%;max-width:280px;padding:15px 10px;margin-bottom:15px;height:auto}.card h3{font-size:16px;margin:10px 0 5px;line-height:1.3;order:1}.card .price{display:block;font-size:16px;font-weight:bold;margin:8px 0;order:2}.image-container{width:100%;padding-bottom:100%;margin-bottom:5px;order:0}.size-selector{margin:8px 0;order:3}.buttons{display:flex;flex-direction:column;align-items:center;width:100%;order:4}.buttons button{width:90%;padding:8px 15px;margin:3px}}