.rollover-background-gradient(@firstColor, @gradient) when (isstring(~"@gradient")) {
	background: @firstColor;
	background: -webkit-linear-gradient(@gradient);
	background: linear-gradient(@gradient);
}
.custom-mixin-bg (@customColor) when (iscolor(@customColor)) {
	background: @customColor;
	box-shadow:         none;
}
.custom-mixin-color (@customColor) when (iscolor(@customColor)) {
	color: @customColor;
}

.custom-mixin-border (@customColor) when (iscolor(@customColor)) {
	border-color: @customColor;
}
.rollover i,
.rollover-video i {
	.@{unique-shortcode-class-name}.enable-bg-rollover & {
		.custom-mixin-bg (@portfolio-rollover-bg);
		.rollover-background-gradient (@firstColor: @portfolio-rollover-bg, @gradient: @portfolio-rollover-bg-gradient);
	}
}
.rollover-icon {
	.@{unique-shortcode-class-name} & {
		font-size: @rollover-icon-size;
    	.custom-mixin-color (@rollover-icon-color);
    	min-width: @rollover-icon-bg-size;
	    min-height: @rollover-icon-bg-size;
	    line-height: @rollover-icon-bg-size;
	    border-radius: @rollover-icon-border-radius;
	    border-style: solid;
	    //margin: -@project-icon-bg-size/2 0 0 -@project-icon-bg-size/2;
	    border-width: @rollover-icon-border-width;
	  	.custom-mixin-border (@rollover-icon-border-color);
	    .dt-icon-bg-on& {
	    	.custom-mixin-bg (@rollover-icon-bg-color);
	    }
	}
}