@mixin transform($rule) {
  -webkit-transform: $rule;
  -moz-transform: $rule;
  -o-transform: $rule;
  transform: $rule;
}

@mixin transform-origin($rule) {
  -webkit-transform-origin: $rule;
  -moz-transform-origin: $rule;
  -o-transform-origin: $rule;
  transform-origin: $rule;
}

@mixin border-radius($rule) {
  -webkit-border-radius: $rule;
  -moz-border-radius: $rule;
  -o-border-radius: $rule;
  -o-border-radius: $rule;
  border-radius: $rule;
}

@mixin box-shadow($rule) {
  -webkit-box-shadow: $rule;
  -moz-box-shadow: $rule;
  -o-box-shadow: $rule;
  -o-box-shadow: $rule;
  box-shadow: $rule;
}