Compass http://compass-style.org/reference/compass/css3/

$primary #1abc9c
$secondary #8E44AD
$tertiaire #3498db
@include border-radius(50px) -webkit-border-radius: 50px;
-moz-border-radius: 50px;
border-radius: 50px;
@include border-radius-bottom-right(30px) -webkit-border-radius-bottomright: 30px;
-moz-border-radius-bottomright: 30px;
border-radius-bottomright: 30px;
@include transitions(0.3s) -webkit-transition: 0.3s;
-moz-transition: 0.3s;
transition: 0.3s;
@include transitions-delay(1s) -webkit-transition-delay: 1s;
-moz-transition-delay: 1s;
transition-delay: 1s;
@include box-shadow(10px) -webkit-box-shadow: 10px;
-moz-box-shadow: 10px;
box-shadow: 10px;
@include opacity(0.6) filter: progid:DXImageTransform.Microsoft.
Alpha(Opacity=60);

opacity: 0.6;
@extend %placeholder
{ border-bottom: 4px blue solid; }
.examples .extend,
.examples .extend2,
.examples .extend3
@extend %placeholder
{ border-bottom: 4px blue solid; }
.examples .extend,
.examples .extend2,
.examples .extend3
@extend %placeholder
{ border-bottom: 4px blue solid; }
.examples .extend,
.examples .extend2,
.examples .extend3
@include background(image-url(loop.svg) background:
url('../images/loop.svg ?1380732841 ')
top left no-repeat #1abc9c;
height: image-height("bckg1.jpg");
width: image-width("bckg1.jpg");

@if

@for