output.css

@custom-selector :--heading h1, h2, h3, h4, h5, h6;body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif}:--heading{background-image:url(img/heading.png);background-image:-webkit-image-set(url(img/heading.png) 1x,url(img/heading@2x.png) 2x);background-image:image-set(url(img/heading.png) 1x,url(img/heading@2x.png) 2x)}@media (-webkit-min-device-pixel-ratio:2),(min-resolution:192dpi){:--heading{background-image:url(img/heading@2x.png)}}@media (max-width:50rem){:--heading{margin-bottom:0;margin-top:0}}:root{--mainColor:rgba(18,52,86,.471)}body{word-wrap:break-word;color:rgba(18,52,86,.471);color:var(--mainColor);font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif,BlinkMacSystemFont,Oxygen,Droid Sans,Helvetica Neue}h1,h2,h3,h4,h5,h6{background-image:url(img/heading.png)}@media (-webkit-min-device-pixel-ratio:2),(min-resolution:192dpi){h1,h2,h3,h4,h5,h6{background-image:url(img/heading@2x.png)}}@media (max-width:50rem){h1,h2,h3,h4,h5,h6{margin-bottom:0;margin-top:0}}a{color:rgba(0,0,255,.9)}a:hover{color:#639}