body { font-family: sans-serif; margin: 0; padding: 0; }
header { background: #f8f8f8; padding: 1rem; display: flex; align-items: center; justify-content: space-between; }
nav a { margin: 0 10px; text-decoration: none; color: #333; }
.logo { height: 50px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; padding: 1rem; }
.product { border: 1px solid #ccc; padding: 1rem; text-align: center; }