.custom-combobox {
    position: relative;
    display: inline-block;
}

.custom-combobox-input {
    margin: 0;
    padding: 5px 10px;
    background-image: url(
        'data:image/svg+xml;utf8,\
        <svg xmlns="http://www.w3.org/2000/svg" width="532" height="460"> \
        <polygon fill="grey" points="530.874,0.5 265.87,459.5 0.866,0.5"/> \
        </svg>'
    ) !important;
    background-repeat: no-repeat !important;
    background-size: 6px auto !important;
    background-position: calc( 100% - 8px ) center !important;
}

.ui-autocomplete {
    max-height: 400px;
    overflow-y: auto;
    overflow-x: hidden;
}

.ui-autocomplete .ui-menu-item:hover {
    background: #eee;
}

.ui-autocomplete .ui-menu-item.disabled {
    opacity: 0.3;
    pointer-events: none;
}

.ui-autocomplete .ui-menu-item.pdqcsv-autocomplete-item-header {
    pointer-events: none;
    font-weight: bold;
    margin-top: 1em;
    font-size: 115%;
}