@mixin margin-selectors($before:1em, $after:1em, $start:0px, $end:0px) {
  -webkit-margin-before: $before;
  -webkit-margin-after: $after;
  -webkit-margin-start: $start;
  -webkit-margin-end: $end;
}

@mixin not-selectable($value:none) {
  user-select: $value;
}

@mixin input-placeholder-color($color) {
  &::-webkit-input-placeholder,
  &::-moz-placeholder, /* Firefox 19+ */
  &:-moz-placeholder, /* Firefox 18- */
  &:-ms-input-placeholder {
    color: $color;
  }
}