body {
    background-color: #f4f6f9;
}
.sidebar {
    height: 100vh;
    background-color: #343a40;
    padding-top: 2rem;
    position: sticky;
    top: 0;
}
.sidebar a {
    color: #cfd8dc;
    text-decoration: none;
    padding: 0.75rem 1rem;
    display: block;
    transition: 0.2s;
}
.sidebar a:hover,
.sidebar a.active {
    background-color: #495057;
    color: white;
    border-left: 4px solid #0d6efd;
}
.sidebar h5 {
    color: #ffffff;
    margin-left: 1rem;
    font-size: 1.1rem;
}
main {
    padding: 2rem;
}