app/css/slimselect.css
.ss-main {
    position: relative;
    display: inline-block;
    user-select: none;
    color: #666;
    width: 100%
}

.ss-main .ss-single-selected {
    display: flex;
    cursor: pointer;
    width: 100%;
    height: 30px;
    padding: 6px;
    border: 1px solid #dcdee2;
    border-radius: 4px;
    background-color: #fff;
    outline: 0;
    box-sizing: border-box;
    transition: background-color .2s
}

.ss-main .ss-single-selected.ss-disabled {
    background-color: #dcdee2;
    cursor: not-allowed
}

.ss-main .ss-single-selected.ss-open-above {
    border-top-left-radius: 0;
    border-top-right-radius: 0
}

.ss-main .ss-single-selected.ss-open-below {
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0
}

.ss-main .ss-single-selected .placeholder {
    flex: 1 1 100%;
    text-align: left;
    width: calc(100% - 30px);
    line-height: 1em;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none
}

.ss-main .ss-single-selected .placeholder, .ss-main .ss-single-selected .placeholder * {
    display: flex;
    align-items: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap
}

.ss-main .ss-single-selected .placeholder * {
    width: auto
}

.ss-main .ss-single-selected .placeholder .ss-disabled {
    color: #dedede
}

.ss-main .ss-single-selected .ss-deselect {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex: 0 1 auto;
    margin: 0 6px;
    font-weight: 700
}

.ss-main .ss-single-selected .ss-deselect.ss-hide {
    display: none
}

.ss-main .ss-single-selected .ss-arrow {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex: 0 1 auto;
    margin: 0 6px
}

.ss-main .ss-single-selected .ss-arrow span {
    border: solid #666;
    border-width: 0 2px 2px 0;
    display: inline-block;
    padding: 3px;
    transition: transform .2s, margin .2s
}

.ss-main .ss-single-selected .ss-arrow span.arrow-up {
    transform: rotate(-135deg);
    margin: 3px 0 0
}

.ss-main .ss-single-selected .ss-arrow span.arrow-down {
    transform: rotate(45deg);
    margin: -3px 0 0
}

.ss-main .ss-multi-selected {
    display: flex;
    flex-direction: row;
    cursor: pointer;
    min-height: 30px;
    width: 100%;
    padding: 0 0 0 3px;
    border: 1px solid #dcdee2;
    border-radius: 4px;
    background-color: #fff;
    outline: 0;
    box-sizing: border-box;
    transition: background-color .2s
}

.ss-main .ss-multi-selected.ss-disabled {
    background-color: #dcdee2;
    cursor: not-allowed
}

.ss-main .ss-multi-selected.ss-disabled .ss-values .ss-disabled {
    color: #666
}

.ss-main .ss-multi-selected.ss-disabled .ss-values .ss-value .ss-value-delete {
    cursor: not-allowed
}

.ss-main .ss-multi-selected.ss-open-above {
    border-top-left-radius: 0;
    border-top-right-radius: 0
}

.ss-main .ss-multi-selected.ss-open-below {
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0
}

.ss-main .ss-multi-selected .ss-values {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
    flex: 1 1 100%;
    width: calc(100% - 30px)
}

.ss-main .ss-multi-selected .ss-values .ss-disabled {
    display: flex;
    padding: 4px 5px;
    margin: 2px 0;
    line-height: 1em;
    align-items: center;
    width: 100%;
    color: #dedede;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap
}

@keyframes scaleIn {
    0% {
        transform: scale(0);
        opacity: 0
    }
    to {
        transform: scale(1);
        opacity: 1
    }
}

@keyframes scaleOut {
    0% {
        transform: scale(1);
        opacity: 1
    }
    to {
        transform: scale(0);
        opacity: 0
    }
}

.ss-main .ss-multi-selected .ss-values .ss-value {
    display: flex;
    user-select: none;
    align-items: center;
    font-size: 12px;
    padding: 3px 5px;
    margin: 3px 5px 3px 0;
    color: #fff;
    background-color: #5897fb;
    border-radius: 4px;
    animation-name: scaleIn;
    animation-duration: .2s;
    animation-timing-function: ease-out;
    animation-fill-mode: both
}

.ss-main .ss-multi-selected .ss-values .ss-value.ss-out {
    animation-name: scaleOut;
    animation-duration: .2s;
    animation-timing-function: ease-out
}

.ss-main .ss-multi-selected .ss-values .ss-value .ss-value-delete {
    margin: 0 0 0 5px;
    cursor: pointer
}

.ss-main .ss-multi-selected .ss-add {
    display: flex;
    flex: 0 1 3px;
    margin: 9px 12px 0 5px
}

.ss-main .ss-multi-selected .ss-add .ss-plus {
    display: flex;
    justify-content: center;
    align-items: center;
    background: #666;
    position: relative;
    height: 10px;
    width: 2px;
    transition: transform .2s
}

.ss-main .ss-multi-selected .ss-add .ss-plus:after {
    background: #666;
    content: "";
    position: absolute;
    height: 2px;
    width: 10px;
    left: -4px;
    top: 4px
}

.ss-main .ss-multi-selected .ss-add .ss-plus.ss-cross {
    transform: rotate(45deg)
}

.ss-content {
    position: absolute;
    width: 100%;
    margin: -1px 0 0;
    box-sizing: border-box;
    border: 1px solid #dcdee2;
    z-index: 1010;
    background-color: #fff;
    transform-origin: center top;
    transition: transform .2s, opacity .2s;
    opacity: 0;
    transform: scaleY(0)
}

.ss-content.ss-open {
    display: block;
    opacity: 1;
    transform: scaleY(1)
}

.ss-content .ss-search {
    display: flex;
    flex-direction: row;
    padding: 8px 8px 6px
}

.ss-content .ss-search.ss-hide, .ss-content .ss-search.ss-hide input {
    height: 0;
    opacity: 0;
    padding: 0;
    margin: 0
}

.ss-content .ss-search input {
    display: inline-flex;
    font-size: inherit;
    line-height: inherit;
    flex: 1 1 auto;
    width: 100%;
    min-width: 0;
    height: 30px;
    padding: 6px 8px;
    margin: 0;
    border: 1px solid #dcdee2;
    border-radius: 4px;
    background-color: #fff;
    outline: 0;
    text-align: left;
    box-sizing: border-box;
    -webkit-box-sizing: border-box;
    -webkit-appearance: textfield
}

.ss-content .ss-search input::placeholder {
    color: #8a8a8a;
    vertical-align: middle
}

.ss-content .ss-search input:focus {
    box-shadow: 0 0 5px #5897fb
}

.ss-content .ss-search .ss-addable {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    font-size: 22px;
    font-weight: 700;
    flex: 0 0 30px;
    height: 30px;
    margin: 0 0 0 8px;
    border: 1px solid #dcdee2;
    border-radius: 4px;
    box-sizing: border-box
}

.ss-content .ss-addable {
    padding-top: 0
}

.ss-content .ss-list {
    max-height: 200px;
    overflow-x: hidden;
    overflow-y: auto;
    text-align: left
}

.ss-content .ss-list .ss-optgroup .ss-optgroup-label {
    padding: 6px 10px;
    font-weight: 700
}

.ss-content .ss-list .ss-optgroup .ss-option {
    padding: 6px 6px 6px 25px
}

.ss-content .ss-list .ss-optgroup-label-selectable {
    cursor: pointer
}

.ss-content .ss-list .ss-optgroup-label-selectable:hover {
    color: #fff;
    background-color: #5897fb
}

.ss-content .ss-list .ss-option {
    padding: 6px 10px;
    cursor: pointer;
    user-select: none
}

.ss-content .ss-list .ss-option * {
    display: inline-block
}
.ss-content .ss-list .ss-option .row{
    display:flex;
}

.ss-content .ss-list .ss-option.ss-highlighted, .ss-content .ss-list .ss-option:hover {
    color: #fff;
    background-color: #5897fb
}

.ss-content .ss-list .ss-option.ss-disabled {
    cursor: not-allowed;
    color: #dedede;
    background-color: #fff
}

.ss-content .ss-list .ss-option:not(.ss-disabled).ss-option-selected {
    color: #666;
    background-color: rgba(88, 151, 251, .1)
}

.ss-content .ss-list .ss-option.ss-hide {
    display: none
}

.ss-content .ss-list .ss-option .ss-search-highlight {
    background-color: #fffb8c
}