CSS touchup and organization

[bpiper91]

• standardized selects and buttons with bulma classes and css
• added second column width for home screen photo at tablet breakpoint
• updated all fox images to scale down to max 450px height
• added bulma classes for padding/margin around text
• adjusted text color to be more readable on orange background
• organized style.css by page section
• fixed bug where end screen wouldn't display message if no fox photos were earned

[bpiper91]

Closed pending merge with Aaron's recent PR