CSS3

What is CSS?

CSS (Cascading Style Sheets) is used to style and layout web pages. It controls the visual presentation, colors, fonts, spacing, and positioning of HTML elements.

Essential Resources

• web.dev CSS Course - Modern CSS from Google
• MDN CSS Guide - Comprehensive CSS learning path
• CSS-Tricks - Tips, tricks, and techniques

Core Concepts

• Selectors: Element, class, ID, attribute selectors
• Box Model: Margin, border, padding, content
• Layout: Flexbox, Grid, positioning, floats
• Responsive Design: Media queries, mobile-first approach
• Animations: Transitions, keyframe animations, transforms
• Custom Properties: CSS variables for theming

Modern CSS Features

• Flexbox Guide - Complete guide to flexbox
• Grid Guide - Complete guide to CSS Grid
• Container Queries: Responsive components
• Subgrid: Nested grid layouts
• :has() Selector: Parent selection capability

Practice & Tools

• CSS Diner - Selector practice game
• Flexbox Froggy - Learn flexbox through games
• Grid Garden - Learn CSS Grid by growing a garden