proekton.com/assets/lib/proekton-components/css/select-box.css

.no-select {
    -webkit-touch-callout: none; /* iOS Safari */
    -webkit-user-select: none; /* Chrome/Safari/Opera */
    -moz-user-select: none; /* Firefox */
    -ms-user-select: none; /* Internet Explorer/Edge */
    user-select: none;
    /* Non-prefixed version, currently
                                     not supported by any browser */
}

/*input[type="checkbox"]:checked + span {*/
/*all: initial;*/
/*font-size: 9pt;*/
/*color: #494546;*/
/*}*/

.select-box-container {
    display: block;
    /*margin-top: 40px;*/
    /*min-width: 200px;*/
}

.select-box-header {
    font-size: 12pt;
    white-space: nowrap;
    word-wrap: break-word;
    /*position: relative;*/
    /*top:10px;*/
}

.select-box-header .header {
    display: inline-block;
    color: black;
    text-overflow: ellipsis;
    overflow: hidden;
    word-wrap: break-word;
    max-width: 220px;

}

.select-box-header .fa {
    color: #5e5e5e;
    position: relative;
    top: -5px;
}

.select-box-header .fa:hover {
    cursor: pointer;
}

.select-box-bottom {
    clear: both;
}

.select-box-results, .select-box-options {
    /*display: block;*/
    /*box-shadow: 0px 0px 10px #777, 0px 15px 10px #000;*/
    position: absolute;
    z-index: 99999;
    opacity: 0.95;
}

.box-wrapper {
    display: block;
    max-height: 200px;
    overflow-y: auto;
    /*border: 1px solid #cccccc;*/
    background-color: #F2F2F2;
    box-shadow: 0 12px 10px -6px rgba(0, 0, 0, .2);
}

.select-box-results input[type=checkbox] {
    margin: 0 5px 0 5px;
}

.select-box-results .header{
    font-size: 8pt;
    color: #757575;
    pointer-events: none;
}

.select-box-results, .select-box-options li, ul {
    margin: 0;
    padding: 0;
}

.select-box-results li, .select-box-options li {
    padding: 2px 10px;
    border: 1px solid #cccccc;
    /*border-right:  1px solid #cccccc;*/

    list-style: none;
    font-size: 9pt;
    color: #494546;
}

.select-box-results label, .select-box-options label,
.select-box-results li, .select-box-options li {
    cursor: pointer;
    display: inline-block;
    font-weight: normal;
    width: 100%;
}

.select-box-results li:hover, .select-box-options li:hover {
    background-color: #dcdcdc;
    border-left: 2px solid red;
    color: #0e0e0e;
}

/*.select-box-results span:hover{*/
    /*color: green;*/
/*}*/
/*.select-box-search{*/
    /*position: relative;*/
/*}*/

input.select-box-search {
    height: 51px;
    width: 100%;
    border: 1px solid #cccccc;
    outline: none;
    padding: 5px 40px 5px 20px;
    background: url("../img/magnifying-glass-308581.svg") no-repeat right;
    background-size: 40px 40px;
    background-color: white;
    margin-bottom: -1px;
}

.select-box-results .main-part {
    display: block;
}

.select-box-results .other-part {
    border-top: 1px solid #000000;
    color: darkgray;
}

.select-box-results .other-header {
    color: #000;
    font-weight: bold;
    margin-left: 10px;
}

/*???*/
.select-box-options .box-wrapper, .select-box-results {
    /*padding: 0 10px;*/
    min-width: 300px;
    max-width: 400px;
}
button.button-add{
    box-shadow: none;
    border: none;
}

.button-add {
    /*position: absolute;*/
    float: right;
    z-index: 999;
    font-family: Myriad;
    font-weight: normal;
    font-style: normal;
    font-size: 12pt;
    -moz-border-radius: 15px; /* Firefox */
    -webkit-border-radius: 15px; /* Safari 4 */
    border-radius: 15px; /* IE 9, Safari 5, Chrome */
    background-color: #FF0029;
    padding: 0 15px;
    /*border: none;*/
    text-decoration: none;
    color: white;

}

/*.button-add .results {*/
    /*position: absolute;*/
    /*left: 280px;*/
    /*z-index: 999;*/
/*}*/

/*.button-add.options {*/
    /*position: absolute;*/
    /*!*FIXME: костыль*!*/
    /*left: 160px;*/
    /*z-index: 999;*/
    /*!*right: auto;*!*/
    /*!*@position: absolute;*!*/
    /*!*top: 40px;*!*/
/*}*/

.highlight {
    color: red;
}