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CSS3 Tutorial• 4 min read
CSS Summary & Certification Exam
Test your CSS mastery and claim your certificate
Congratulations! You have completed all 12 comprehensive CSS3 lessons: Box Model, Flexbox, Grid, Media Queries, Transitions, Animations, Custom Properties, Transforms, :has(), and Cascade Layers.
Certification Competency Checklist
1The Box Model: content, padding, border, and margin.
2Layout engines: Flexbox 1D alignment vs CSS Grid 2D matrices.
3Mobile-first responsive design with @media queries.
4GPU-accelerated transforms and @keyframes animations.
5CSS custom properties (--variable) and runtime theming.
6Modern :has() parent selection, clamp() fluid units, and @layer boundaries.
Pro Tip
Take the interactive CSS3 Certification Quiz now, score 80% or higher, and earn your official verified certificate!
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