custom-dropdown.css

/*!
 * gist.github.com/englishextra/9348598
 * pastebin.com/i4w9B7zX
 */
.custom-dropdown {
    display: inline-block;
    width: 280px;
    position: relative;
    vertical-align: middle;
    margin: 0;
}
.custom-dropdown select {
    font-size: 1em;
    text-indent: 0.01px;
    text-overflow: '';
    color: #FFF;
    background-color: rgba(80, 111, 124, 1);
    border: 0;
    padding: .5em;
    margin: 0;
    -webkit-appearance: button;
}
.custom-dropdown::before,
.custom-dropdown::after {
    content: "";
    position: absolute;
    pointer-events: none;
}
.custom-dropdown::after {
    height: 1em;
    font-size: .625em;
    line-height: 1;
    right: 1.2em;
    top: 50%;
    content: "\25BC";
    margin-top: -.5em;
}
.custom-dropdown::before {
    width: 2em;
    right: 0;
    top: 0;
    bottom: 0;
}
.custom-dropdown select[disabled],
.custom-dropdown select[disabled]::after {
    color: #FFF;
    opacity: .375;
}
.custom-dropdown::before {
    background-color: rgba(0,0,0,.0375);
}
.custom-dropdown::after {
    color: #FFF;
}
@media (min-width: 1px) and (max-width: 320px) {
    .custom-dropdown {
        width: 100%;
    }
}