select.css

/* Style when highlighting a search. */
.ui-select-highlight {
    font-weight: bold;
}

.ui-select-offscreen {
    clip: rect(0 0 0 0) !important;
    width: 1px !important;
    height: 1px !important;
    border: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
    overflow: hidden !important;
    position: absolute !important;
    outline: 0 !important;
    left: 0px !important;
    top: 0px !important;
}


/* Helper class to show styles when focus */
.btn-default-focus {
    color: #333;
    background-color: #EBEBEB;
    border-color: #ADADAD;
    text-decoration: none;
    outline: 5px auto -webkit-focus-ring-color;
    outline-offset: -2px;
    box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(102, 175, 233, 0.6);
}

.ui-select-choices-row>a {
    display: block;
    padding: 3px 20px;
    clear: both;
    font-weight: 400;
    line-height: 1.42857143;
    color: #333;
    white-space: nowrap;
}

.ui-select-choices-row>a:hover, .ui-select-choices-row>a:focus {
    text-decoration: none;
    color: #262626;
    background-color: #f5f5f5;
}

.ui-select-choices-row.active>a {
    color: #fff;
    text-decoration: none;
    outline: 0;
    background-color: #428bca;
}

.ui-select-choices-row.disabled>a, .ui-select-choices-row.active.disabled>a {
    color: #777;
    cursor: not-allowed;
    background-color: #fff;
}

/* fix hide/show angular animation */
.ui-select-match.ng-hide-add,
.ui-select-search.ng-hide-add {
    display: none !important;
}

/* Mark invalid Bootstrap */
.ui-select-bootstrap.ng-dirty.ng-invalid > button.btn.ui-select-match {
    border-color: #D44950;
}