What You'll Learn

Advanced CSS covers modern layout systems, animations, responsive design patterns, and performance optimization techniques that are essential for professional web development.

Key Topics:

• CSS Grid: Two-dimensional layout system
• CSS Flexbox: One-dimensional layout system
• CSS Animations: Keyframes, transitions, and transforms
• Responsive Design: Mobile-first and adaptive layouts
• Performance: Optimization and best practices
• Modern Techniques: CSS custom properties, logical properties

CSS Grid Example

.grid-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: auto 1fr auto;
    gap: 1rem;
    min-height: 100vh;
}

.grid-item {
    grid-column: 1 / -1; /* Span all columns */
}

CSS Flexbox Example

.flex-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.flex-item {
    flex: 1;
}

CSS Animation Example

@keyframes slideIn {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.animated-element {
    animation: slideIn 0.5s ease-out;
}

CSS Transform Example

.transform-element {
    transition: transform 0.3s ease;
}

.transform-element:hover {
    transform: rotate(45deg) scale(1.2);
}

Layout Best Practices

• Use Grid for page layouts: CSS Grid is perfect for overall page structure
• Use Flexbox for components: Flexbox excels at component-level layouts
• Mobile-first approach: Start with mobile layouts and enhance for larger screens
• Semantic HTML: Use meaningful HTML structure before applying CSS
• Performance optimization: Use GPU-accelerated properties for animations
• Accessibility: Ensure layouts work with screen readers and keyboard navigation

Animation Best Practices

• Keep animations subtle: Enhance user experience, don't distract
• Respect user preferences: Honor prefers-reduced-motion
• Use appropriate timing: 200-400ms for micro-interactions
• Optimize for performance: Use transform and opacity for smooth animations
• Provide fallbacks: Don't rely on animations for critical functionality