.left-border(@r: 0) {
  border-top-left-radius:    @r !important;
  border-bottom-left-radius: @r !important;
}

.right-border(@r: 0) {
  border-top-right-radius:    @r !important;
  border-bottom-right-radius: @r !important;
}

.bottom-border(@r: 0) {
  border-bottom-left-radius:  @r !important;
  border-bottom-right-radius: @r !important;
}

.top-border(@r: 0) {
  border-top-left-radius:  @r !important;
  border-top-right-radius: @r !important;
}

.radius(@r: 0) {
  border-radius: @r !important;
}

.hide {
  all: unset    !important;
  display: none !important;
  width:   0    !important;
  height:  0    !important;
}