.ms-options-wrap>button:focus, .ms-options-wrap>button
{
    position: relative;
    width: 100%;
    text-align: left;
    border: 1px solid #aaa;
    background-color: #fff;
    padding: 5px 20px 5px 5px;
    margin-top: 1px;
    font-size: 13px;
    color: #aaa;
    outline: none;
    white-space: nowrap;
}
.ms-options-wrap>button:after
{
    content: ' ';
    height: 0;
    position: absolute;
    top: 50%;
    right: 5px;
    width: 0;
    border: 6px solid rgba(0,0,0,0);
    border-top-color: #999;
    margin-top: -3px;
}
.ms-options-wrap>ul
{
    position: absolute;
    left: 0;
    width: 100%;
    margin-top: 1px;
    background: #fff;
    z-index: 2000;
    border: 1px solid #aaa;
}
.ms-options-wrap>ul>li.optgroup
{
    padding: 5px;
}
.ms-options-wrap>ul>li.optgroup+li.optgroup
{
    border-top: 1px solid #aaa;
}
.ms-options-wrap>ul>li.optgroup .label
{
    padding: 5px 0 0 0;
    font-weight: bold;
}
.ms-options-wrap>ul label
{
    position: relative;
    display: inline-block;
    width: 100%;
    padding: 4px;
    margin: 1px 0;
}
.ms-options-wrap>ul li.selected label, .ms-options-wrap>ul label:hover
{
    background-color: #efefef;
}
.ms-options-wrap>ul input[type="checkbox"]
{
    margin-right: 5px;
    position: absolute;
    left: 4px;
    top: 6px;
}