WordPress and CSS: The Conversion Mindset
Converting an HTML/CSS design to WordPress is not a simple copy-paste. It requires understanding the WordPress CSS architecture and how themes like GeneratePress and builders like Bricks intercept and extend standard CSS.
1. How WordPress Loads CSS
WordPress loads stylesheets in this order (later overrides earlier):
- Theme Base Styles (GeneratePress core CSS).
- Theme Customizer Settings (your color/font choices as CSS variables).
- Child Theme stylesheet (
child-theme/style.css). - Additional CSS (Customizer → Additional CSS — for small tweaks).
- Page-level CSS (via a block's "Advanced → Additional CSS" or Bricks element styles).
2. The WordPress CSS Specificity Stack
Inline style (element)
> Page-specific CSS (custom field / block)
> Additional CSS (Customizer)
> Child theme style.css
> Parent theme style.css
Understanding this stack is critical: if your AI-generated CSS override isn't working, the issue is usually specificity or load order.
3. Key Differences: Raw HTML vs WordPress
| Aspect | Raw HTML/CSS | WordPress |
|---|---|---|
| HTML structure | You write everything | Theme generates it |
| CSS classes | Your class names | Theme class names (gp-inner, .gb-container) |
| Fonts | @font-face or <link> | Theme → Customizer → Fonts |
| Colors | :root variables | Theme global colors |
| Responsive | You write media queries | Theme handles some, you override |
| JS interactions | Vanilla JS | Plugins + block editor handles |
4. The HTML/CSS → WordPress Conversion Workflow
1. Build design in pure HTML/CSS (with AI)
↓
2. Identify the structural blocks (header, hero, cards, footer)
↓
3. Map each block to a WordPress equivalent
↓
4. Apply your CSS overrides to matching PHP/block classes
↓
5. Extract global design tokens into theme variables