[Nit] Challenging to see what page a user is on

[spanishpear]

I was trying to go to the page, but forgot the url! So I let my browser autocomplete take me to https://ansi.tools/lookup

However, it took me an embarrassingly long time to realise I was on the lookup table, and thought the interactive section had been removed!

It would be great if there was some styling for the active route :) Happy to take a look at this, but putting an issue for now 👁👁

[webpro]

Oh you're right! Thanks for bringing this up. Feel free to take a stab at it, maybe you have ideas how this could be improved?