@mixin dot($size, $color, $marginRight) {
  position: relative;
  &:before {
    position: absolute;
    content: '';
    display: inline-block;
    width: $size;
    height: $size;
    border-radius: 50%;
    background: $color;
    margin-right: $marginRight;
    vertical-align: middle;
  }
}