body {
    font-family: 'Arial', sans-serif;
}

.sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    padding: 0;
    height: 100%;
    background-color: #343a40;
}

.sidebar .nav-link {
    color: #ffffff;
    padding: 15px;
}

.sidebar .nav-link.active {
    background-color: #007bff;
}

.main-content {
    margin-left: 200px;
    padding: 20px;
}

.table-responsive {
    margin-top: 20px;
}

.card {
    margin-bottom: 20px;
}

.card-header {
    font-weight: bold;
}