HTML Layout Techniques & Elements (W3Schools)
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1. HTML Layout Elements:
   - <header>: Defines a header for a document or a section
   - <nav>: Defines a set of navigation links
   - <section>: Defines a section in a document
   - <article>: Defines independent, self-contained content
   - <aside>: Defines content aside from the content (like a sidebar)
   - <footer>: Defines a footer for a document or a section
   - <details>: Defines additional details that the user can open/close
   - <summary>: Defines a heading for the <details> element

2. Layout Techniques:
   - CSS Frameworks (e.g., Bootstrap, W3.CSS)
   - CSS Float Layout (using float and clear properties)
   - CSS Flexbox Layout (responsive and flexible)
   - CSS Grid Layout (grid-based row and column layout)