Add CSS to the generated daily mantra

[Kamori]

Lets make the site more visually appealing AND relaxing.

Ideal visuals

• Simple gradients
• Light colors but not ultra bright or ultra dim
• Simple animations that aren't distracting
• Non-random
  • The style of the day is the same for everyone
  • the style of the day can be easily reproduced and tell what was applied each day.

[Kamori]

a blue_relax.css has been added to the project. No animations and no alternating styles implemented yet.