.icon-48-icon_jmon {
    background-image: url(watchfulli_picto_48x48.png);
}

/* Joomla 3 */
.icon-icon_jmon {
    background-image: url(watchfulli_picto_48x48.png);
    width: 30px !important;
    height: 30px !important;
    background-size: 30px;
    vertical-align: -8px;
}