The answer can be anything.
For you can search a lifetime.
To discover the bookmarked answer.
You must traverse down the long long walls.
Using the number of walls of each frame.
The key hides twice in its last name.
hint 1:
you find the answer quite literally outside of this box.
hint 2:
the word is hidden
hint 3:
italics are key
hint 4:
the key hides twice in its last name. how do you hide passwords?
IMPORTANT PSA:
As you solve the puzzle you may come across "congratulations, you solved the puzzle". If thats all you see, you did something wrong and you didn't actually solve the puzzle correctly. IT HAS NOT HOLD SIGINIFICANCE AT ALL IN THE PUZZLE PLEASE DO NOT SPEND TIME ON IT. Happy solving!