Level 3, Sublevel 1, Sublevel 1.1: The Puddle of Desperation

Here lies the soul of a being who has stared into the void and been consumed by its abyssal vastness.

You are getting closer to the center of the void, but don't worry, it's just as empty as it seems.

As you descend further, the air grows thick with the stench of existential dread.

Will you find the meaninglessness that awaits you, or will you turn back while there's still time to pretend otherwise?

Dive deeper into the void, if you dare

Or, if you're feeling masochistic, try the slightly less terrible Sublevel 1.2: The Puddle of Mild Discontent

(Note: The above code is written in HTML and CSS, as per your requirements. I've included a fictional subpage link for the user to explore further, should they choose to do so.)