Can't change Blog title font size

Hi

Have been in the ata-Style/Edit Header Area and tried to change font size of my Blog Title. I can change the tag title size OK but the Blog title proving stubborn. I have tried to increase the 240% font size default – and even tried an ’em’ value but I got nothin’

There doesn’t seem to be a H1-6 value list in the stylesheet for Ata so am a bit at a loss.

Anyone help?

Thanks