sass mixins

gistfile1.txt

@mixin gradient($first, $second, $colorstop:0) {
  background: $first;
  background: -webkit-gradient(linear, left top, left bottom, from($first), color-stop($colorstop, $first), to($second));
  background: -moz-linear-gradient(top,  $first $colorstop,  $second);
}

@mixin border-gradient($first, $second, $colorstop:0) {
  border-color:$first;
	border-style:double;
	-webkit-border-image: -webkit-gradient(linear, 0 100%, 0 0, from($first), to($second)) 1 100%;
}

@mixin box-shadow($first, $second:0){
	@if( $second == 0 ) {
		-moz-box-shadow: $first;
		-webkit-box-shadow: $first;
		box-shadow: $first;
	}@else{
		-moz-box-shadow: $first, $second;
		-webkit-box-shadow: $first, $second;
		box-shadow: $first, $second;
	}
}

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

@mixin oswald {
	font-weight:normal;
	font-family:'Oswald', Helvetica, Arial, Sans-serif;
}

@mixin helvetica {
	font-weight:normal;
	font-family:Helvetica, Arial, Sans-serif;
}

@mixin georgia {
	font-style:italic;
	font-family: Georgia, Arial Serif;
}

@mixin box-sizing {
	-moz-box-sizing:border-box;
  -webkit-box-sizing: border-box;
	box-sizing:border-box;
}

@mixin radius-circle {
  @include border-radius(150px);
}


@mixin media_query($type, $filename, $background-size) {
	@if $type == max {
  	@media only screen and (-webkit-max-device-pixel-ratio: 1.5),
		only screen and (max--moz-device-pixel-ratio: 1.5),
		only screen and (-o-max-device-pixel-ratio: 3/2),
		only screen and (max-device-pixel-ratio: 1.5) {
			background:image_url($filename) no-repeat;
			-webkit-background-size:$background-size;
			background-size:$background-size;
		}
	}
	@if $type == min {
		@media only screen and (-webkit-min-device-pixel-ratio: 1.5),
		only screen and (min--moz-device-pixel-ratio: 1.5),
		only screen and (-o-min-device-pixel-ratio: 3/2),
		only screen and (min-device-pixel-ratio: 1.5) {
			background:image_url($filename) no-repeat;
			-webkit-background-size:$background-size;
			background-size:$background-size;
		}
	}
}

or
@include border-gradient(rgba(54, 63, 58, .5), rgba(54, 63, 58, .1));
@include box-shadow(rgba(0, 0, 0, 0.45) 0 4px 16px 0 inset, rgba(255,255,255, 0.25) 0 1px 1px 0);
@include border-gradient(rgba(54, 63, 58, .1), rgba(54, 63, 58, 1));