User:Mackiwg/vector.css

.collapseBracket { opacity: 0.5; filter:alpha(opacity=50); -moz-opacity: 0.5; }

transition: opacity .25s ease-in-out; -moz-transition: opacity .25s ease-in-out; -webkit-transition: opacity .25s ease-in-out; }
 * 1) mw-head, #mw-panel,.mw-editsection {opacity: 0.1; filter:alpha(opacity=10);
 * 1) mw-head:hover, #mw-panel:hover,.mw-editsection:hover {opacity: 1.0; filter:alpha(opacity=100); }