Formula:Sandbox/test.css

#collapse-pre-one  .mw-collapsible-toggle .up,
#collapse-pre-one.mw-collapsed .mw-collapsible-toggle .down {
 display: none;
}
#collapse-pre-one .mw-collapsible-toggle .down,
#collapse-pre-one.mw-collapsed  .mw-collapsible-toggle .up {
 display: block;
}

.icon-collabi {
	background-image: url(//upload.wikimedia.org/wikipedia/commons/9/9b/Arrow-up-dash-small.svg);
	background-size: 1.6em 1.6em;
	background-position: right center;
	padding-left: 2em;
	padding-top: 0.2em;
	background-repeat: no-repeat;
}

.icon-dilatare {
	background-image: url(//upload.wikimedia.org/wikipedia/commons/e/e1/Arrow-down-dash-small.svg);
	background-size: 1.6em 1.6em;
	background-position: right center;
	padding-left: 2em;
	padding-top: 0.2em;
	background-repeat: no-repeat;
}

.icon-nigra-collabi {
	background-image: url(//upload.wikimedia.org/wikipedia/commons/2/29/High-contrast-go-up.svg);
	background-size: 1.2em 1.2em;
	background-position: right center;
	padding-top: 0.2em;
	background-repeat: no-repeat;
}

.icon-nigra-dilatare {
	background-image: url(//upload.wikimedia.org/wikipedia/commons/e/e2/High-contrast-go-down.svg);
	background-size: 1.2em 1.2em;
	background-position: right center;
	padding-top: 0.2em;
	background-repeat: no-repeat;
}