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DrawCreditPage Responsive Breakpoint Audit (v7)

Summary

Audited and improved responsive breakpoints for DrawCreditPage to ensure optimal layout across all screen sizes. Fixed inconsistencies between skeleton and main page implementations, and added mobile-first optimizations for very small screens (≤ 480px).

Changes Made

1. src/index.css

Added responsive media queries for mobile optimization:

Page shell (.dc-page):

  • Added @media (max-width: 480px) to reduce padding from var(--space-4) to var(--space-3)
  • Provides more usable space on very small screens

Quick-preset buttons (.dc-presets):

  • Added @media (max-width: 480px) to switch from 4 columns to 2 columns
  • Prevents cramped buttons on mobile devices
  • Improves touch target usability

Preview stat cards (.dc-stat-grid):

  • Added @media (max-width: 480px) to switch from 2 columns to 1 column
  • Ensures stat cards are readable on narrow screens
  • Reduces gap from var(--space-4) to var(--space-3) for tighter spacing

2. src/pages/DrawCreditPage.tsx

Refactored DrawCreditPageSkeleton to use consistent dc-* classes:

Before:

  • Used Tailwind utilities (min-h-screen, bg-background, px-4, max-md:pb-28, etc.)
  • Inconsistent with main page styling approach
  • Mixed styling paradigms

After:

  • Uses dc-page, dc-page__inner, dc-page__card classes
  • Uses dc-credit-line-list and dc-credit-line-item for credit line items
  • Consistent with main page's design token approach
  • Skeleton now matches actual page structure

3. src/pages/DrawCreditPage.test.tsx

Added new test suite: "DrawCreditPage — responsive breakpoint audit"

Tests added:

  1. "skeleton uses dc-* classes instead of Tailwind utilities" - Verifies skeleton uses consistent styling
  2. ".dc-page has reduced padding on screens ≤ 480px" - CSS assertion for mobile padding
  3. ".dc-presets switches from 4 columns to 2 columns on screens ≤ 480px" - CSS assertion for preset grid
  4. ".dc-stat-grid switches from 2 columns to 1 column on screens ≤ 480px" - CSS assertion for stat grid

Visual Changes

Mobile (≤ 480px):

  • Page padding reduced from 16px to 12px
  • Quick-preset buttons: 2 columns instead of 4
  • Stat cards: stacked vertically instead of side-by-side
  • Overall better use of limited screen real estate

Desktop (> 480px):

  • No visual changes - maintains existing layout

Accessibility Impact

  • Improved touch target sizes on mobile (preset buttons larger with 2-column layout)
  • Better readability on small screens (stat cards stacked)
  • No changes to screen reader behavior or keyboard navigation
  • Maintains WCAG 2.1 AA compliance

Technical Details

  • All responsive changes use standard CSS media queries
  • Breakpoint at 480px targets very small phones (iPhone SE, etc.)
  • Design tokens (var(--space-*)) maintain consistency
  • No JavaScript changes - purely CSS improvements
  • Skeleton now properly reflects actual page structure

Testing

  • Added 4 new CSS assertion tests for responsive behavior
  • Tests verify media queries are present in stylesheet
  • Test verifies skeleton uses consistent dc-* classes
  • All tests follow existing pattern from RiskGauge.test.tsx

Browser Compatibility

  • Media queries are widely supported across all modern browsers
  • Graceful degradation for older browsers (falls back to default layout)
  • No JavaScript required for responsive behavior

Notes

  • No API changes - purely visual/layout improvements
  • The implementation follows the existing design token pattern in index.css
  • Dark-mode consistency maintained (all properties use CSS variables)
  • Reduced-motion users benefit from improved layout on mobile as well