body {
    min-height: 100vh;
}

.sidebar {
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    width: 220px;
    background-color: #343a40;
    padding-top: 60px;
}

.sidebar a {
    color: #fff;
    display: block;
    padding: 12px 20px;
    text-decoration: none;
}

.sidebar a:hover {
    background-color: #495057;
}

.main {
    margin-left: 220px;
    padding: 20px;
}

@media (max-width: 768px) {
    .sidebar {
        position: static;
        width: 100%;
        height: auto;
        padding-top: 0;
    }

    .main {
        margin-left: 0;
    }
}