90's style NASA Website

Create a website (HTML + CSS only, no JavaScript) that looks like a secret page hidden in the source code of an old 1990s NASA website. The page should contain mysterious messages, a blinking warning headline (using only CSS), encoded messages resembling ASCII art, and "interplanetary transmission logs" displayed in a monospace terminal-style font. Add a CRT monitor effect using CSS only to make it look like it's being viewed on an old screen. Everything should appear as an abandoned page that was never meant to be seen by the public Internet. Bonus: Add a mysterious “DECLASSIFY” button that reveals an encrypted message when hovered over (using only CSS, e.g., with :hover). The page should work entirely offline and not use any external resources.