Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.4.12)
// Compass (v1.0.3)
// ----

$first-var: #fff;

/*
  @import 'sample';
*/

@mixin border-radius($radius){
  border-radius: $radius;
  -ms-border-radius: $radius;
}

body{
  background: $first-var;
  width: calc(25% - 5px);
}

.sample{
  background: #000;
  &-code{
    color: #fff;
  }
}

nav{
  ul{
    padding: 0px;
    margin:0px;
    li{
      padding-left: 10px;
      @extend body;
      @include border-radius(5px);
    }
  }
}

SassMeister-output.css

/*
  @import 'sample';
*/
body, nav ul li {
  background: #fff;
  width: calc(25% - 5px);
}

.sample {
  background: #000;
}
.sample-code {
  color: #fff;
}

nav ul {
  padding: 0px;
  margin: 0px;
}
nav ul li {
  padding-left: 10px;
  border-radius: 5px;
  -ms-border-radius: 5px;
}