Gadget-NavboxStyle.css

Note: After publishing, you may have to bypass your browser's cache to see the changes.

Firefox / Safari: Hold Shift while clicking Reload, or press either Ctrl-F5 or Ctrl-R (⌘-R on a Mac)
Google Chrome: Press Ctrl-Shift-R (⌘-Shift-R on a Mac)
Internet Explorer / Edge: Hold Ctrl while clicking Refresh, or press Ctrl-F5
Opera: Press Ctrl-F5.

/* Navbox templates, with mobile support */

/* Halo/Destiny */
.navbox-heading {
	clear: both !important;
}
.mobile.skin-timeless .navbox-heading,
body:not(.skin-minerva) .navbox + .navbox-heading {
	border: 0 !important;
	font-size: 0 !important;
	line-height: 0 !important;
	padding: 0 !important;
}
.mobile.skin-timeless .navbox-heading::after,
body:not(.skin-minerva) .navbox + .navbox-heading::after {
	border: 0 !important;
}
.navbox .navbox-heading,
.toc a[href^="#See_also_"],
.mobile.skin-timeless .navbox-heading > .mw-ui-icon {
	display: none !important;
}
.mobile.skin-timeless .navbox-heading + .collapsible-block {
	display: block !important;
}
.mobile.skin-timeless .navbox {
	margin-top: 2px !important;
}
.mobile.skin-timeless .navbox .navbox {
	margin-top: 0 !important;
}
.mobile.skin-timeless h2:not(.navbox-heading) + section + .navbox-heading + section > .navbox {
	margin-top: 15px !important;
}
.skin-timeless .navbox td {
	padding-top: 0 !important;
}
.navbox-title,
.navbox-title a,
.navbox-title span {
	color: white !important;
}
.navbox-title.light,
.navbox-title.light a,
.navbox-title.light span {
	color: black !important;
}
body:not(.skin-minerva) .navbox-title {
	padding-right: 5px;
}
.navbox {
	clear: both;
	border-spacing: 0;
	margin: 15px auto 2px !important;
	width: 100% !important;
}
.navbox table {
	border-spacing: 0;
}
.navbox:last-of-type {
	margin-bottom: 0 !important;
}
.navbox .navbox {
	margin: 0 auto !important;
}
.navbox + .navbox-heading + .navbox,
.navbox + div + p + .navbox, 
.navbox + p + .navbox,
.navbox + .navbox {
	margin-top: 0 !important;
}
.mobile .navbox .mw-collapsible-toggle-expanded {
	padding-left: 6px;
}
.navbox .mw-collapsible-toggle-expanded {
	padding-left: 5px;
}

/* Custom */
.hide .mw-collapsible-toggle-expanded {
	padding-left: 5px;
}

MediaWiki:Gadget-NavboxStyle.css