STORY-047: Dark Mode for Reduced Eye Strain #3
Description
User Story
As a Conference Attendee,
I want to use the survey in dark mode,
So that I can complete the survey comfortably in low-light conditions without eye strain.
Context
Many attendees complete surveys during evening sessions or in dimly lit venues. Dark mode reduces eye strain and is increasingly expected as a standard accessibility feature. It also improves battery life on OLED devices.
Source
Discovery Cycle: 2025-12-02-dark-mode
Synthesis Reference: iterations/2025-12-02-dark-mode/discovery/observations/dark-mode-requirements.md
User Need: Accessibility and comfort - reduce eye strain in various lighting conditions
Supporting Evidence: Standard accessibility expectation for modern web applications
Acceptance Criteria
Functional Scenarios
Scenario 1: System Preference Detection (Happy Path)
- Given a user has dark mode enabled in their device settings
- When they open the survey for the first time
- Then the survey automatically displays in dark mode
- And all screens use consistent dark mode styling
Scenario 2: Manual Theme Toggle
- Given a user is viewing the survey
- When they click the theme toggle
- Then the theme switches between light and dark mode
- And the preference persists across page loads
Scenario 3: No Flash on Load
- Given a user has dark mode preference saved
- When they load any survey page
- Then the page renders in dark mode immediately without flashing light theme first
Scenario 4: Equal Experts Logo in Dark Mode
- Given a user is viewing the survey in dark mode
- When the Equal Experts logo is displayed
- Then black pixels in the logo are inverted to white
- And the logo remains clearly visible against the dark background
Non-Functional Requirements
- Accessibility: All text meets WCAG AA contrast requirements in dark mode
- Accessibility: Focus indicators clearly visible in dark mode
- Performance: Theme switching is instant without layout shift
- Usability: Theme toggle is keyboard accessible and screen reader friendly
Quality Checklist
- Dark mode colors have sufficient contrast for readability
- All UI components work correctly in both modes
- Theme toggle announces state change to screen readers
- Works across Chrome, Safari, Firefox, Edge
- Equal Experts logo displays correctly with inverted colors (black to white)
Open Questions
- Should we provide an "auto" option that always follows system preference?
Does Equal Experts have dark mode logo variants to use?Resolved: Use CSS filter to invert black pixels to white in dark mode (no separate logo needed)
Dependencies
- MVP survey UI must be complete (stories 019-039)
Estimate
Size: S
Confidence: High
Reasoning: Dark mode is a well-established pattern with clear implementation approaches. Primary work is defining the color palette and ensuring all components adapt correctly.
Story ID: STORY-047
Iteration: 2025-12-02-dark-mode
Priority: Medium
Last Updated: 2025-12-08