body {
    background-color: #f5f6fa;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

.product-card {
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.product-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.navbar-brand i {
    color: #28a745;
}

.card-img-top {
    background-color: #fff;
}

.alert-item {
    border: 1px solid #e9ecef;
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 8px;
}

.alert-item:last-child {
    margin-bottom: 0;
}

.spinner-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}