@mixin border-radius($radius) {
  -webkit-border-radius: $radius;
     -moz-border-radius: $radius;
      -ms-border-radius: $radius;
          border-radius: $radius;
}
@mixin transition($transition) {
  -webkit-transition: $transition;
     -moz-transition: $transition;
      -ms-transition: $transition;
          transition: $transition;
}
@mixin box-shadow($b-shadow) {
  -webkit-box-shadow: $b-shadow;
     -moz-box-shadow: $b-shadow;
      -ms-box-shadow: $b-shadow;
          box-shadow: $b-shadow;
}
@mixin transform($transform) {
  -webkit-transform: $transform;
     -moz-transform: $transform;
      -ms-transform: $transform;
          transform: $transform;
}