html { --bannerimage: url('https://peda.net/dev/theme/mantsala/style/mantsala3-png:file/download/'); --bannerheight: minmax(max(20rem,25vh), auto); }

html { --bannerbackgroundsize: cover; }

.banner {
background-image:url('https://peda.net/dev/theme/mantsala/style/mantsala3-png:file/download/');
background-repeat:no-repeat;
background-size:cover;

}

html{
    --bannerheight: minmax(max(17rem,21vh), auto);

}