Slidious uses percentage values for all animations and page dimensions.
This makes your page fully responsive. Also you will have to take care of your content yourself. Slidious just handles the containers.
Try it out by resizing the container. You can go back to the previous page & play around a bit.
Slidious (yeah, I get paid for writing the name) hides the provided menu by default. You can deactivate this & use the menu like all other page links.
Here's the menu again. Where do you want to go next?