:root {
    --bs-body-bg: #f8f9fa;
}
[data-bs-theme="dark"] {
    --bs-body-bg: #212529;
    --bs-body-color: #dee2e6;
}
body {
    transition: background-color 0.3s, color 0.3s;
}
.sidebar .nav-link.active {
    font-weight: bold;
    color: var(--bs-primary) !important;
}
@media (max-width: 768px) {
    .sidebar {
        min-height: auto !important;
        padding-bottom: 1rem;
    }
}