Generated by SassMeister.com.

SassMeister-input.scss

// ----
// libsass (v0.7.0)
// ----

$gray-light: #eee;
$active-blue: #ddd;
$accent-blue: #0F0;
$gray: #ccc;

@mixin btn-overrides {
  .btn-default {
  	background-color: $gray-light;
  	color: $accent-blue;
  	&:hover {
  		background-color: $gray;
  		color: $active-blue;
  	}
  }
  .btn-primary {
  	background-color: $accent-blue;
  	border-color: $accent-blue;
  }
}

@include btn-overrides;
.lt-ie9 {
  @include btn-overrides;
}

SassMeister-output.css

.btn-default {
  background-color: #eee;
  color: #0F0; }
  .btn-default:hover {
    background-color: #ccc;
    color: #ddd; }

.btn-primary {
  background-color: #0F0;
  border-color: #0F0; }

.lt-ie9 .btn-default {
  background-color: #eee;
  color: #0F0; }
  .lt-ie9 .btn-default:hover {
    background-color: #ccc;
    color: #ddd; }
.lt-ie9 .btn-primary {
  background-color: #0F0;
  border-color: #0F0; }