//SCSS SYNTAX
//box-sizing: border-box snippet ^_^
@mixin box-sizing($box-model) {
 -webkit-box-sizing: $box-model; // Safari <= 5
    -moz-box-sizing: $box-model; // Firefox <= 19
         box-sizing: $box-model;
}
//border-radius stuffs^_^
@mixin border-radius($radius) {
  -webkit-border-radius: $radius;
     -moz-border-radius: $radius;
      -ms-border-radius: $radius;
          border-radius: $radius;
}
/* Apply to Your elements */
.box { @include border-radius(10px); }