I don't use vh because I read mostly with RMSDK on Kobo and it doesn't work.
Code:
.fr {
display:flex;
flex-direction:column;
justify-content:space-between;
height:90vh;
}
I'm not 100% sure, but I would think that the class "fr" will not work in RMSDK as none of that is compatible.
Question I have is what in the .fr class will work with KePub other then the height line?