@mixin opacity($opacity) {
  opacity: $opacity;
  filter: Alpha(opacity=$opacity*100);
}

@mixin button {
  cursor: pointer;
  user-select: none;
  border: none;
  outline: 0;
  white-space: nowrap;
  &:hover {
    @include opacity(0.8);
  }
}

@mixin height($height) {
  height: $height;
  line-height: $height;
}

@mixin round {
  border-radius: 50%;
}

@mixin borderRouned($radius) {
  &.rounded {
    border-radius: $radius;
  }
}