select {

  /* styling */
  background-color: white;
  display: inline-block;
  font: inherit;
  line-height: 1.5em;
  padding: 0.5em 3.5em 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;
}




select::-ms-expand {display:none;}

/* arrows */

select.classic {
  background-image:
    linear-gradient(45deg, transparent 50%, black 50%),
    linear-gradient(135deg, black 50%, transparent 50%),
    linear-gradient(to right, #dddddd, #dddddd) !important;
  background-position:
    calc(100% - 22px) calc(1em + 2px),
    calc(100% - 15px) calc(1em + 2px),
    100% 0 !important;
  background-size:
    8px 8px,
    8px 8px,
    2.5em 2.5em !important;
  background-repeat: no-repeat !important;
}

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) !important;
  background-position:
    calc(100% - 15px) 1em,
    calc(100% - 22px) 1em,
    100% 0 !important;
  background-size:
    8px 8px,
    8px 8px,
    2.5em 2.5em !important;
  background-repeat: no-repeat;
  border-color: grey;
  outline: 0 !important;
}


/*

select.round {
  background-image:
    linear-gradient(45deg, transparent 50%, gray 50%),
    linear-gradient(135deg, gray 50%, transparent 50%),
    radial-gradient(#ddd 70%, transparent 72%);
  background-position:
    calc(100% - 20px) calc(1em + 2px),
    calc(100% - 15px) calc(1em + 2px),
    calc(100% - .5em) .5em;
  background-size:
    5px 5px,
    5px 5px,
    1.5em 1.5em;
  background-repeat: no-repeat;
}

select.round:focus {
  background-image:
    linear-gradient(45deg, white 50%, transparent 50%),
    linear-gradient(135deg, transparent 50%, white 50%),
    radial-gradient(gray 70%, transparent 72%);
  background-position:
    calc(100% - 15px) 1em,
    calc(100% - 20px) 1em,
    calc(100% - .5em) .5em;
  background-size:
    5px 5px,
    5px 5px,
    1.5em 1.5em;
  background-repeat: no-repeat;
  border-color: green;
  outline: 0;
}





select.minimal {
  background-image:
    linear-gradient(45deg, transparent 50%, gray 50%),
    linear-gradient(135deg, gray 50%, transparent 50%),
    linear-gradient(to right, #ccc, #ccc);
  background-position:
    calc(100% - 20px) calc(1em + 2px),
    calc(100% - 15px) calc(1em + 2px),
    calc(100% - 2.5em) 0.5em;
  background-size:
    5px 5px,
    5px 5px,
    1px 1.5em;
  background-repeat: no-repeat;
}

select.minimal:focus {
  background-image:
    linear-gradient(45deg, green 50%, transparent 50%),
    linear-gradient(135deg, transparent 50%, green 50%),
    linear-gradient(to right, #ccc, #ccc);
  background-position:
    calc(100% - 15px) 1em,
    calc(100% - 20px) 1em,
    calc(100% - 2.5em) 0.5em;
  background-size:
    5px 5px,
    5px 5px,
    1px 1.5em;
  background-repeat: no-repeat;
  border-color: green;
  outline: 0;
}

*/
select:-moz-focusring {
  color: transparent;
  text-shadow: 0 0 0 #000;
}