I\'m trying to customise the new Twitter widget, but having some problems with the CSS and can\'t seem to override theirs on this new one. I\'ve tried searching for solution
They create an iframe, so it is another document.
You cannot style elements in another document, so it is not possible unless twitter provides a hook to embed your own stylesheet in their iframe..
Twitter only allows to style the link color of the widget and pick a light/dark theme.
Alternatively, you can create your own widget by using the twitter API and then you can style it anyway you want..