body {
    background-color: #f8f9fa;
}
#main-content {
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
.card {
    border-radius: 8px;
}
.btn {
    transition: all 0.2s ease;
}
.btn:hover {
    transform: translateY(-2px);
}
.table th, .table td {
    vertical-align: middle;
}
.product-thumbnail {
    border-radius: 5px;
}
section {
    animation: fadeIn 0.5s ease-in;
}
#revenueChart {
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 10px;
    display: block;
    width: 100%;
    max-height: 400px;
}
details {
    font-size: 0.9em;
    color: #555;
    margin-top: 10px;
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}