div.wpc_notification {
    padding: 15px;
    background: #4eac34;
    color: white;
    text-align: center;
    font-size: 16px;
}

div.wpc_notification a {
    color: #fff;
    position: relative;
}

div.wpc_notification a:after {
    content: '';
    height: 1px;
    width: 100%;
    display: block;
    background-color: #fff;
    position: absolute;
    left: 0;
    bottom: -1px;
}

div.wpc_notification a:hover {
    color: #efefef;
}

div.wpc_notification a:hover:after {
    background-color: #efefef;
}