body {
    overflow-x: hidden;
}
.sidebar {
    width: 230px;
    min-height: 100vh;
    background: #212529;
}
.sidebar a {
    color: #fff;
    padding: 12px 18px;
    display: block;
    text-decoration: none;
}
.sidebar a:hover,
.sidebar a.active {
    background: #343a40;
}