Accessibility

Fluid layout sizing and accessibility text scaling solve different problems. opa_rfs keeps them separate.

What opa_rfs controls

The package resolves an unscaled logical-pixel font size from the available layout. This establishes the design's responsive base size.

What Flutter controls

Flutter's ambient TextScaler remains responsible for applying the user's system font-size preference, including nonlinear platform scaling. The package does not multiply, clamp, replace, or disable it.

The result is the same composition Flutter uses with fixed font sizes:

responsive base font size → ambient TextScaler → text layout

Practical guidance

• Test the smallest layout together with increased system text sizes.
• Allow text to wrap and avoid tight fixed-height containers around text.
• Keep meaningful minimums for display and headline styles.
• Use structural breakpoints when content must change from a row to a column.
• Treat RfsEnabled(enabled: false) as a layout tool, not an accessibility override.