ABMaterial 3.00 Chipmunk will have a method to inject CSS. You can use normal CSS, including things like e.g. @media. Of course you will need to be very precise with your selector and a good knowledge of CSS will be required.
Usage:
B4X:
Dim CSS As String = $"@media screen and (min-width: 880px) {
button i {
background-color: lightgreen !important;
}
}"$
page.InjectCSS(CSS)