MediaWiki:Gadget-SidebarTOC.css

#p-toc {
    position: sticky;
    top: 0.5em;
}

#p-toc .vector-menu-content-list {
    max-height: calc(100vh - 3.75em - 12px - var(--sticky-bottom, 0px));
    overflow-y: auto;
    color-scheme: dark;
    scrollbar-width: thin;
    overscroll-behavior: none;
}

@media (prefers-reduced-motion: no-preference) {
	#p-toc .vector-menu-content-list {
		scroll-behavior: smooth;
	}
}

#p-toc .vector-menu-content-list ul {
    margin-left: 10px;
}

#p-toc .vector-menu-content-list ul li {
    font-size: inherit;
}

#p-toc .tocsection-current > a {
	font-weight: bold;
	text-decoration: underline;
}

#p-toc .tocnumber {
    color: white;
    display: none; /* they take up too much space */
}

@media screen and (max-width: 720px) {
	#p-toc {
    	display: none;
	}
}