MediaWiki:Common.css

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

#wpTextbox1 {
  width: 100%;
}


.tooltip {
    position:relative
}

.tooltiptext {
    position: absolute;
    display: block;
    z-index: 2;
    width: 250px;
    padding: 10px;
    visibility: hidden;
    opacity: 0;
    white-space: normal;
    text-align: left;
    transition: all 0.2s;
    border: 1px solid #aaa;
    background-color:#ffdd66
}

.tooltip:hover > .tooltiptext {
    visibility: visible;
    opacity:1
}