@mixin arrowDown {
  content: " ";
  display: block;
  position: absolute;
  top: 50%;
  right: 15px;
  margin-top: -3px;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 5px 5px 0 5px;
  border-color: #808080 transparent transparent transparent;
}