.selector-style {
    padding: 0;
    width: 20em;
    max-width: 20em;
    position: relative;
    border: none;
    background: silver;
    text-decoration: none;
    text-overflow: ellipsis;
    white-space: nowrap;
    overflow: hidden;
    margin: 1px;
}

.selector-style select {
    padding: 0.2em 0.2em;
    width: 20em;
    max-width: 20em;
    border: none;
    box-shadow: none;
    background-color: silver;
    background-image: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

.selector-style:after {
    top: 50%;
    left: 95%;
    border: solid;
    content: " ";
    height: 0;
    width: 0;
    position: absolute;
    pointer-events: none;
    border-color: rgba(0, 0, 0, 0);
    border-top-color: #000000;
    margin-top: -2px;
    z-index: 100;
}
select.selector option{
    color: white;
    background-color: grey;
    padding: 0 10px;
}

.selector-style select:focus {
    outline: none;
}
.selector-style select option:hover {
    background: grey;
}