sample.scss

sample.scss

@mixin line-bottom($op1: .2, $op2: .3){
  border-bottom: 1px solid rgba(0, 0, 0, $op1);
  @include box-shadow(rgba(255, 255, 255, $op2)0 1px 0);
}

#main {
  color: #666;
  font-size: 0.3em;
  @include line-bottom(.3, .1);
  a {
    font: {
      weight: bold;
      family: serif;
      color: #F00
    }
    &:hover {
      background-color: #FF0;
    }
  }
}