CSS3 Advanced Training Course

1. Modern CSS and the Evolution of CSS

• The transition from CSS3 to modern CSS
• Current CSS standards and browser implementation
• Understanding CSS specifications and browser support
• Progressive enhancement strategies
• Feature detection and graceful degradation
• Navigating the modern CSS ecosystem

2. Advanced Selectors

• Advanced attribute selectors
• Structural pseudo-classes
• :is()
• :where()
• :not()
• :has() and relational selectors
• Understanding selector specificity
• Managing specificity in large-scale projects
• Best practices for modern selectors

3. Modern Colours and Visual Effects

• RGB, HSL, and modern colour functions
• color(), lab(), lch(), oklab(), and oklch()
• Relative colours
• Transparency and alpha channels
• Advanced gradients
• Linear, radial, and conic gradients
• color-mix()
• Colour interpolation
• CSS filters and visual effects
• Modern theming and colour systems

4. CSS Custom Properties and Design Systems

• CSS variables / custom properties
• Variables and fallback values
• Dynamic theming
• Component-level customisation
• Design tokens in CSS
• Creating light and dark themes
• Utilising var(), @property, and typed custom properties
• Building maintainable CSS design systems

5. CSS Nesting and Cascade Management

• Native CSS nesting
• Nesting syntax and best practices
• CSS nesting vs. pre-processors
• Cascade and inheritance
• Cascade layers with @layer
• Managing third-party CSS
• @scope and scoped styling concepts
• Building predictable CSS architectures

6. Advanced Layout with Flexbox

• Review of Flexbox fundamentals
• Main axis and cross axis
• Advanced alignment
• Flexible sizing
• gap
• Wrapping and ordering
• Nested Flexbox layouts
• Common Flexbox patterns
• Responsive components using Flexbox

7. Advanced CSS Grid

• Review of Grid fundamentals
• Explicit and implicit grids
• Advanced track sizing
• minmax()
• auto-fit and auto-fill
• min(), max(), and clamp()
• Grid areas
• Responsive Grid layouts
• Complex page layouts
• CSS Subgrid
• Using Subgrid for aligned component layouts

8. Container Queries and Component-Based Responsiveness

• Why viewport media queries are insufficient
• Container query concepts
• container-type
• @container
• Container query length units
• Component-driven responsive design
• Container query style queries
• Designing reusable responsive components
• Container queries vs. media queries

9. Modern Responsive Design

• Mobile-first design
• Responsive breakpoints
• Fluid typography
• Fluid spacing
• clamp()
• Modern viewport units:
  • svh
  • lvh
  • dvh
  • svw
  • lvw
  • dvw
• Dynamic viewport considerations
• Container-relative units
• Responsive images and media
• Reducing unnecessary media queries

10. Logical Properties and Internationalisation

• Logical vs. physical CSS properties
• margin-inline / margin-block
• padding-inline / padding-block
• inset-inline / inset-block
• Logical sizing
• Writing modes
• Right-to-left (RTL) layouts
• Building internationally adaptable interfaces

11. Modern Typography

• Responsive typography
• Variable fonts
• Font loading considerations
• font-size-adjust
• Fluid type scales
• Text wrapping and overflow
• text-wrap: balance
• text-wrap: pretty
• hyphens
• Modern typography best practices

12. Transforms, Transitions, and Animations

• 2D and 3D transformations
• Transitions
• Keyframe animations
• Timing functions
• Animation composition
• Transform performance
• Scroll-driven animations
• animation-timeline
• View-timeline concepts
• Motion accessibility
• prefers-reduced-motion
• Performance considerations

13. Modern CSS UI Features

• Native CSS dialogs and popovers
• Styling interactive UI states
• :popover-open
• :modal
• :focus-visible
• :target
• Form-state styling
• accent-color
• appearance
• field-sizing
• Modern form controls
• Building accessible CSS-only interactions

14. Advanced CSS Functions

• calc()
• min()
• max()
• clamp()
• minmax()
• fit-content()
• color-mix()
• Relative colour functions
• Combining functions for fluid layouts
• Practical responsive design patterns

15. CSS Pre-processors

• Overview of CSS pre-processors
• LESS
• Variables and mixins
• Nesting styles
• Functions and operations
• LESS vs. modern native CSS
• When a pre-processor is still useful
• Migrating pre-processor features to native CSS

16. Design and Accessibility Considerations

• Modern CSS best practices
• Accessibility-first styling
• Keyboard focus states
• :focus-visible
• Reduced motion
• Contrast and colour considerations
• Responsive text and content
• Text over images
• Accessible responsive components
• Progressive enhancement

17. CSS Performance and Maintainability

• Reducing CSS complexity
• Avoiding unnecessary specificity
• Cascade layers for maintainability
• Reusable utility and component patterns
• CSS containment concepts
• content-visibility
• Rendering and layout performance
• Reducing layout shifts
• Organising large CSS codebases
• Debugging CSS with modern browser developer tools

18. Practical Modern CSS Project

Participants will build a responsive modern web interface incorporating:

• CSS Grid
• Flexbox
• Subgrid
• Container queries
• CSS nesting
• Custom properties
• Cascade layers
• Modern selectors
• Fluid typography
• Modern viewport units
• Responsive design
• Modern colours and gradients
• Animations and transitions
• Accessibility considerations
• Performance best practices