check styles for compliance

[jessicamcinchak]

ddot is undergoing a rebranding, we need to get their new style guidelines and compliance standards

[maxatdetroit]

I'll pick this up.

Style guidelines: https://detroitmi.gov/departments/department-innovation-and-technology/style-guide

We can also look into adopting the city's design system which has adopted these style guidelines and will probably address the A11Y issues raised elsewhere (#88, #90).