Browse and take tests to sharpen your skills
How semantic structure and styling work together: landmarks, focus, responsive images, and spacing tokens.
Authoring maintainable structure, styling, and SCSS modules together: compilation, variables vs CSS custom properties, and partial organization.
BFC, flex/grid sizing, media, and motion preferences.
Selectors, the box model, cascade basics, common layout primitives, and units. Mix of single-answer and multiple-answer items.
Layers, :has, containment, scroll, and rendering edge cases.
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