body {
    background-color: #f0f2f5;
}
.navbar-brand {
    font-weight: bold;
}
.sidebar {
    background-color: #343a40;
    padding: 20px;
    height: 100vh;
    overflow-y: auto;
    color: #fff;
    width: 250px;
}
.content {
    padding: 20px;
}
.card-header {
    background-color: #007bff;
    color: #fff;
}
.table thead th {
    background-color: #007bff;
    color: #fff;
}
.table tfoot th {
    background-color: #e9ecef;
}
.highlight-red {
    color: red;
    font-weight: bold;
}
.highlight-green {
    color: green;
    font-weight: bold;
}
.highlight-blue {
    color: blue;
    font-weight: bold;
}
.nav-link.active, .nav-link:hover {
    background-color: #495057;
    color: #fff !important;
}
.nav-link {
    color: #adb5bd;
}
.modal-header {
    background-color: #dc3545;
    color: white;
}
/* Responsive adjustments */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
    }
    .content {
        margin-left: 0;
    }
}