I already submitted an issue on github (https://github.com/SimpleMachines/SMF2.1/issues/5650) but meantime would like you to point me in which CSS file I can increase this. Thanks in advance.
You can add this to responsive.css
@media (max-width: 480px)
{
.post {
font-size: 15px;
}
}
you might want to edit the line height as well.
thank you, just did that. I put finally 16px. Its more readable now, the default size is really way too small.