Transition from reactstrap to custom design system

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Based on design expectations, it will be best to remove any reactstrap dependencies and roll custom components. This allows greater flexibility in the long run.

Items to discuss

• Which CSS preprocessor to use going forward. CSS modules are certainly a good idea, but Styled Components are more versatile for using React props.

Action items

• Create a global stylesheet with theme colors, font sizing, and general styling (box-sizing: border-box, no margins on body, etc.)
• Replace applicant info form with components for formatting layout. This involves creating wrapper components for horizontal columns (flex box), headers, subheaders, and paragraph text
• Rebuild splash screen using custom components. Not much to specify here, but it should match the visuals of the current splash screen (with some toned down colors 😊)
• Remove reactstrap as a project dependency

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Moved to just a floating issue to build out as we go