.selectdiv {
    position: relative;
    display: flex;
}

.selectdiv:after {
    /* arrow */
    content: '';
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid #fff;
    position: absolute;
    right: 5px;
    top: calc(50% - 2.5px);
    pointer-events: none;
    z-index: 3;
}

.selectdiv select {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    /* Add some styling */

    display: block;
    width: 100%;
    max-width: 320px;
    float: right;
    margin: 2px 0px;
    padding: 0px 24px 0px 5px;
    color: #fff;
    background-color: transparent;
    background-image: none;
    border: 0;
    -ms-word-break: normal;
    word-break: normal;
}

select:focus {
  outline: none;
}