.product-page{max-width:960px;margin:2rem auto;padding:1.5rem 2rem;background-color:#ffffff;border-radius:8px;box-shadow:0 2px 10px rgba(0,0,0,.05);color:#333333;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}.product-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem;padding-bottom:1.5rem;border-bottom:1px solid #eeeeee}.back-link,.cart-link{color:#555555;text-decoration:none;font-weight:600;transition:color .2s ease}.back-link:hover,.cart-link:hover{color:#111111;text-decoration:underline}.product-details{display:flex;gap:2.5rem;flex-wrap:wrap;align-items:flex-start}.product-image{max-width:350px;width:100%;border-radius:4px;object-fit:contain;border:1px solid #eeeeee}.product-info{flex:1 1;min-width:300px}.product-info h1{margin-top:0;margin-bottom:1.2rem;color:#111111;font-size:2.5rem;font-weight:700;line-height:1.2}.description{color:#555555;font-size:1.05rem;line-height:1.7}.description,.price{margin-bottom:1.8rem}.price{font-weight:700;font-size:2.2rem;color:#0b0b0b}.stock{font-weight:600;margin-bottom:1.8rem;font-size:1.15rem}.stock.in-stock{color:#000000}.stock.out-of-stock{color:#cc3333}label{display:block;margin-bottom:.6rem;font-weight:600;color:#333333;font-size:1rem}input[type=number]{width:80px;padding:.6rem .8rem;font-size:1.05rem;margin-bottom:2rem;border:1px solid #cccccc;background-color:#ffffff;color:#333333;border-radius:4px}.add-button{background-color:#111111;border:none;color:#ffffff;padding:.8rem 1.5rem;font-weight:700;border-radius:4px;cursor:pointer;font-size:1.1rem;transition:background-color .3s ease}.add-button:disabled{background-color:#bbbbbb;color:#555555;cursor:not-allowed}.add-button:hover:not(:disabled){background-color:#555555}.added-msg{margin-top:2rem;color:#339966;font-weight:600;font-size:1.1rem}@media (max-width:768px){.product-page{margin:1rem auto;padding:1rem 1.5rem}.product-details{flex-direction:column;align-items:center;gap:1.5rem}.product-image{max-width:80%}.product-info{min-width:unset;width:100%;text-align:center}.product-info h1{font-size:2rem}.price{font-size:1.8rem}.add-button{width:100%;padding:.8rem 1.5rem}}@media (max-width:480px){.product-page{padding:.8rem 1rem}}