// from https://stackoverflow.com/a/12178019/323407 .fade-out-vertical( @backgroundColor: white ) { @invisible: fadeout( @backgroundColor, 100% ); background-image: linear-gradient( to bottom, @invisible 0%, @backgroundColor 100% ); // W3C } .fade-out-horizontal( @backgroundColor: white ) { @invisible: fadeout( @backgroundColor, 100% ); background-image: linear-gradient( to right, @invisible 0%, @backgroundColor 100% ); // W3C } .rotate( @degrees: 45deg ) { transform: rotate( @degrees ); } .grayscale() { /* stylelint-disable-next-line plugin/no-unsupported-browser-features */ -webkit-filter: grayscale( 100% ); /* stylelint-disable-next-line plugin/no-unsupported-browser-features */ filter: grayscale( 100% ); }