How to make tabs look like like distinct tabs? (Upfront)

I am using the tab element on pages in upfront to encourage people to slow their thinking down. And look at things step-by-step, tab by tab.
I do not know how to make the tabs look like tabs though- so if people are not expecting them it just looks like a line of text.

In the pictures you can see a little arrow, don't remember how I got that in there, it was my way of hinting at the tabs and covering up the text of the following tab.

Is there a way to show that the tabs are tbas? Little outlines of shading or something?

Thanks for your help,
Peter[image pos="0"][image pos="0"]