body { font-family: Arial, sans-serif; margin: 0; background: #f4f4f4; }
.container { padding: 20px; max-width: 600px; margin: auto; background: white; }
input, button { width: 100%; padding: 10px; margin: 5px 0; }
.nav-bar { display: flex; background: #007bff; color: white; }
.tab-btn { flex: 1; background: none; border: none; color: white; padding: 15px; cursor: pointer; }
.tab-btn.active { font-weight: bold; border-bottom: 3px solid white; }
.tab-content { display: none; padding: 20px; }
.tab-content.active { display: block; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 15px; }
.product-card { background: white; padding: 10px; text-align: center; border-radius: 8px; box-shadow: 0 2px 5px rgba(0,0,0,0.1); }
.product-card img { width: 100%; height: 150px; object-fit: cover; border-radius: 5px; }
.buy-btn { display: block; background: #28a745; color: white; text-decoration: none; padding: 10px; border-radius: 5px; margin-top: 10px; }