MediaWiki:Common.css

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

inputbox {
  text-align: left;
  margin-left: 0 !important;
}

.mw-inputbox-centered {
    margin: 0 !important;
    text-align: left !important;
    display: block !important;
}

.mw-inputbox-centered form {
    display: inline-block !important;
}