select {

    /* styling */
    border-radius: 4px;
    display: inline-block;
    font: inherit;
    line-height: 1.5em;
    padding: 0.5em 0.5em 0.5em 1em;

    /* reset */

    margin: 0;      
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    -webkit-appearance: none;
    -moz-appearance: none;
    }


    /* arrows */

    select.classic {
    background-image:
    linear-gradient(45deg, transparent 50%, blue 50%),
    linear-gradient(135deg, blue 50%, transparent 50%),
    linear-gradient(to right, white, transparent);
    background-position:
    calc(100% - 20px) calc(1em + 2px),
    calc(100% - 15px) calc(1em + 2px),
    100% 0;
    background-size:
    5px 5px,
    5px 5px,
    2.5em 2.5em;
    background-repeat: no-repeat;
    }

    select.classic:focus {
    background-image:
    linear-gradient(45deg, white 50%, transparent 50%),
    linear-gradient(135deg, transparent 50%, white 50%),
    linear-gradient(to right, gray, gray);
    background-position:
    calc(100% - 15px) 1em,
    calc(100% - 20px) 1em,
    100% 0;
    background-size:
    5px 5px,
    5px 5px,
    2.5em 2.5em;
    background-repeat: no-repeat;
    outline: 0;
}