gistfile1.css

/* select-style une div qui entoure le select */

.select-style{
    border: 1px solid #ccc;
    width: 120px;
    overflow: hidden;
    background: #fff url("https://github.com/google/material-design-icons/blob/master/hardware/1x_web/ic_keyboard_arrow_down_black_18dp.png?raw=true") no-repeat 90% 50%;
}


.select-style select{
   background: transparent;
   width: 268px;
   padding: 5px;
   line-height: 1;
   border: 0;
   border-radius: 0;
   height: 34px;
   -webkit-appearance: none;
}

.select-style select:focus {
    outline: none;
}