body{margin:0;font-family:Arial;background:#fafafa}
.topbar{display:flex;gap:10px;padding:10px;background:#111;color:white;align-items:center}
.topbar input{flex:1;padding:8px;border-radius:4px;border:1px solid #ccc}
.cart-btn{color:white;text-decoration:none;background:#ff9900;padding:8px 12px;border-radius:4px}
.nav{background:#222;display:flex;gap:10px;padding:10px}
.nav a{color:white;text-decoration:none;background:#444;padding:6px 10px;border-radius:4px}
main{padding:10px}
.wrap{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:15px}
.product{background:white;padding:10px;border-radius:8px;box-shadow:0 0 5px rgba(0,0,0,.1);text-align:center}
.product img{width:100%;height:160px;object-fit:cover;border-radius:6px}
.old{text-decoration:line-through;color:#888}
footer{text-align:center;padding:20px;background:#111;color:white;margin-top:20px}
@media(min-width:600px){.wrap{grid-template-columns:repeat(2,1fr)}}
@media(min-width:900px){.wrap{grid-template-columns:repeat(4,1fr)}}