#sidebar {
    position: relative;
}

.sidebar-logo {
    flex: 0 0 auto;
    padding: 10px;
    background-color: var(--sidebar-bg);
}

.sidebar-logo img {
    max-width: 100%;
    display: block;
}

#sidebar .sidebar-scrollbox {
    display: block;        /* custom elements are inline by default */
    position: relative;
    top: auto;
    right: auto;
    bottom: auto;
    left: auto;
    flex: 1 1 auto;
    min-height: 0;
}