Style form

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Style form labels and input fields.

Remember to follow UX best practices refer to notes here for sources:

• Highlight active form field
• Labels above input fields
• Hint text between labels and form field
• Validation errors underneath hint text and/or label, above field
• Form should be in a single column, multiple columns cause confusion
• Use labels, not placeholders
• Explicitly mark required fields as required, optional as optional (ALL fields are currently considered required for this version)