#sidenav-collapse-main::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.2);
}

/* Chrome, Edge, Safari */
#sidenav-collapse-main::-webkit-scrollbar {
    width: 8px;
}

#sidenav-collapse-main::-webkit-scrollbar-track {
    background: #2b2b2b; /* same as navbar background */
}

#sidenav-collapse-main::-webkit-scrollbar-thumb {
    background-color: #777; 
    border-radius: 4px;
}

#sidenav-collapse-main::-webkit-scrollbar-thumb:hover {
    background-color: #999;
}

/* Firefox */
#sidenav-collapse-main {
    scrollbar-width: thin;
    scrollbar-color: #555 #2b2b2b;
}