body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

.footer {
    margin-top: auto;
}

.item-quantity-input {
    width: 80px;
}

@media (max-width: 768px) {
    .card-columns {
        column-count: 1;
    }
}

@media (min-width: 769px) and (max-width: 992px) {
    .card-columns {
        column-count: 2;
    }
}

.stat-card {
    transition: transform 0.2s;
}

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