11.2. Ensure content visibility even when its size is doubled
Guarantee content readability even when font is twice the default size.
Across the entire font size increase range, content and functionalities must not overlap or disappear.
To ensure this rule is respected:
- Use only relative units (
%, etc.) to manage spaces (CSS properties
- Do not use units (
%, etc.) with the CSS
- Do not define a fixed height (CSS
heightproperty) on elements likely to contain text, particularly form fields.
- Be careful when using absolute positioning (CSS declaration:
position: absolute;). Although this type positioning is compatible with accessibility, it can cause content overlap in some cases.