.catalog {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    justify-content: center;
}

.product-card {
    flex: 1 1 calc(25% - 1.5rem);
    max-width: calc(25% - 1.5rem);
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
}

.product-card img {
    width: 100%;
    height: auto;
}

.product-card .product-title {
    font-weight: 600;
    margin: 0.5rem 0;
}

.product-card .product-price {
    margin: 0.5rem 0;
}

.product-card .btn-group {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

/* Responsive */
@media(max-width: 1200px){
    .product-card {
        flex: 1 1 calc(33.333% - 1.5rem);
        max-width: calc(33.333% - 1.5rem);
    }
}
@media(max-width: 768px){
    .product-card {
        flex: 1 1 calc(50% - 1.5rem);
        max-width: calc(50% - 1.5rem);
    }
}
@media(max-width: 480px){
    .product-card {
        flex: 1 1 100%;
        max-width: 100%;
    }
}