MediaWiki:Gadget-UserLinkAvatar.css

img.userlink-avatar-small {
    margin-left: 0.2em;
    margin-right: 0.2em;
    width: 1.5em;
    border-radius: 15%;
    margin-top: -0.2em;
}

.userlink-avatar-large {
    display: none;
    position: absolute;
    top: 1em;
    left: 1em;
    padding: 1.5em;
    border: solid #A7D7F9 1px;
    border-radius: 3px;
    background-color: white;
}

.userlink-avatar-large img {
    min-width: 128px;
}

.userlink-avatar-hover,
.userlink-avatar-hover .userlink-avatar-small {
    position: relative;
    cursor: pointer;
}

.userlink-avatar-hover:hover .userlink-avatar-large {
    display: block;
    z-index: 91;
}