.ms-container {
    width: 100%;
}

.ms-exchange {
    position: absolute;
    left: 50%; /* relative to nearest positioned ancestor or body element */
    top: 50%; /*  relative to nearest positioned ancestor or body element */
    transform: translate(-50%, -50%); /* relative to element's height & width */
}

.ms-container:after {
    content: ".";
    display: block;
    height: 0;
    line-height: 0;
    font-size: 0;
    clear: both;
    min-height: 0;
    visibility: hidden;
}

.ms-container .ms-selectable, .ms-container .ms-selection {
    background: #fff;
    color: #555555;
    float: left;
    width: 45%;
}

.ms-container .ms-selection {
    float: right;
}

.ms-container .ms-list {
    -webkit-box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075);
    -moz-box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075);
    box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075);
    -webkit-transition: border linear 0.2s, box-shadow linear 0.2s;
    -moz-transition: border linear 0.2s, box-shadow linear 0.2s;
    -ms-transition: border linear 0.2s, box-shadow linear 0.2s;
    -o-transition: border linear 0.2s, box-shadow linear 0.2s;
    transition: border linear 0.2s, box-shadow linear 0.2s;
    border: 1px solid var(--grey-lighter);
    position: relative;
    height: 50vh;
    padding: 0;
    overflow-y: auto;
}

.ms-container .ms-list.ms-focus {
    outline: 0;
    outline: thin dotted \9;
}

.ms-container ul {
    margin: 0;
    list-style-type: none;
    padding: 0;
}


.ms-container li {
    line-height: 30px;
}


.ms-container .ms-optgroup-container {
    width: 100%;
}

.ms-container .ms-optgroup-label {
    margin: 0;
    padding: 5px 0px 0px 5px;
    cursor: pointer;
    color: #999;
}

.ms-container .ms-selectable li.ms-elem-selectable,
.ms-container .ms-selection li.ms-elem-selection {
    border-bottom: 1px #eee solid;
    padding: 2px 10px;
    color: #555;
    font-size: 14px;
}

.ms-container .ms-selectable li.ms-hover,
.ms-container .ms-selection li.ms-hover,
.ms-container .ms-selectable li:hover,
.ms-container .ms-selection li:hover {
    cursor: pointer;
    /*color: #fff;*/
    text-decoration: none;
    background-color: var(--grey-lightest); /*#08c;*/
}

.ms-container .ms-selectable li.disabled,
.ms-container .ms-selection li.disabled {
    background-color: #eee;
    color: #aaa;
    cursor: text;
}