CD-11: Improve the styling/UI of the website

[farnaf]

Deadline: Saturday (12/04/2021) before midnight (11:59PM)

MUST be worked on:

• [x] Add styling elements, choose a theme for the website. We need styling for the following:
  • [x] recipeCards
  • [x] recipeExpand (when recipeCard is clicked)
  • [x] publicRecipeCard (just make sure styling applies to this too)
  • [x] navigation bar
  • [x] login page (index.html)
  • [x] home page + tutorial image (CD-6)
• [x] Make sure the styling is consistent across ALL HTML files/pages

[Ray160]

The expand page isn't fully finished but the rest is done.

[Fhuynh1]

The styling is done, but something went wrong and the recipeExpand shows up on the bottom of the page rather than as a new page.