:root{font-family:system-ui,sans-serif;color:#172033;background:#f5f7fb}body{margin:0}header,main{max-width:1160px;margin:auto;padding:20px}header{display:flex;justify-content:space-between;align-items:center}.brand{font-weight:800;color:#183583;text-decoration:none}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}.card,#cart,#product-view{background:#fff;border-radius:12px;padding:18px;box-shadow:0 2px 12px #14254a12}.card img,.gallery img{width:100%;height:220px;object-fit:contain}.gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px}button{padding:9px 14px;border:0;border-radius:7px;background:#234fd2;color:#fff;cursor:pointer}button:disabled{opacity:.45;cursor:not-allowed}input,textarea{display:block;width:100%;box-sizing:border-box;padding:9px;margin:5px 0 12px}.cart-line{display:grid;grid-template-columns:1fr 100px auto;gap:10px;border-bottom:1px solid #ddd;padding:10px 0}.hp{position:absolute;left:-10000px}.notice{padding:10px;background:#fff1d6}.error{color:#a40000}@media(max-width:600px){.cart-line{grid-template-columns:1fr}.grid{grid-template-columns:1fr}}