fix navbar styling (CSS)

[AlisterBrumley]

• center images with text
• zoom/scale images with text
• might have to flex center to make grow from center

[AlisterBrumley]

• centered images with text
• zooming fixed
• code needs cleaning
• growth doesnt work on thin screens; perhaps move to scale?

[AlisterBrumley]

fixed logo shadow so its more legible, and matching hero text shadow