.rounded-corners(@border-radius: 0.4em) {
  border-radius: @border-radius;

  -webkit-background-clip: padding-box;
  -moz-background-clip: padding;
  background-clip: padding-box;
}

.appearance(@appearance) {
  -webkit-appearance: @appearance;
  -moz-appearance: @appearance;
  -ms-appearance: @appearance;
  appearance: @appearance;
}

.box-shadow(@x: 0.2em; @y: 0.2em; @blur: 0.2em; @spread: 0; @color: rgba(83, 83, 83, 0.25)) {
  -webkit-box-shadow: @arguments;
  -moz-box-shadow: @arguments;
  box-shadow: @arguments;
}
