MediaWiki:Common.css

/* CSS placed here will be applied to all skins */

#mw-panel {
    width: 10px;  /* Shrinks sidebar */
    overflow: hidden;
    transition: width 0.3s ease-in-out;
}

#mw-panel:hover {
    width: 180px; /* Expand on hover */
}

/* Change background color */
body {
    background-color: rgb(55, 56, 62) !important;
}

/* Set background image */
body {
    background-image: url('/images/custom-background.png');
    background-size: cover;
    background-attachment: fixed;
}