Update website design

[tfuxu]

This PR updates the look of the site and fixes some issues with responsiveness on mobile phones.

Updated look:

On mobile:

PS. This was supposed to be a simple fix for oversized images on the webpage, but I ended up almost reformatting the whole site 😅️

[tfuxu]

@aclark4life I moved your job notice to the info bar below the navbar. Can it be here or would you want it to be placed somewhere else?

[aclark4life]

Well played, thank you!!

[tfuxu]

Thanks!
I checked the site, and it looks like I forgot to uncomment that info bar after testing 😬️. I'll make a quick PR to fix this

[hugovk]

Would you also like to have a look at https://pagespeed.web.dev/analysis/https-python-pillow-org/3h4xjteulj?form_factor=mobile and see if there's some accessibility and performance things that can be easily fixed?

(I've done some in #37)

[tfuxu]

Would you also like to have a look at https://pagespeed.web.dev/analysis/https-python-pillow-org/3h4xjteulj?form_factor=mobile and see if there's some accessibility and performance things that can be easily fixed?

(I've done some in #37)

Sure, I can try to fix some