Speed is Politeness

Poor architecture slows down page rendering.

How to Optimize:

1. Critical CSS: Extract " first screen " styles and insert them directly in HTML, load the rest later.
2. Garbage Removal: Use tools (PurgeCSS) to remove unused classes.
3. Minification: Code compression (removing spaces and comments).
4. Content-visibility: Allows browser to skip rendering blocks that are currently off-screen.

.footer {
  content-visibility: auto; /* Browser won't waste effort on footer until we scroll to it */
  contain-intrinsic-size: 500px; /* Reserve space */
}