HTML5 provides semantic elements to structure a webpage clearly:
<header> → Top section (logo, title)
<nav> → Navigation links/menu
<section> → A section of content
<article> → Independent content (blog post, news)
<aside> → Sidebar or related content
<footer> → Bottom section (copyright, info)
<details> → Expandable content
<summary> → Title for <details>
These elements improve structure, readability, and SEO.
There are four main ways to create layouts:
Prebuilt layout systems (fast and responsive).
Old method using float property.
Not recommended for modern full layouts.
Used for one-dimensional layouts (row or column).
Good for responsive design.
Used for two-dimensional layouts (rows + columns).
Best for modern complex layouts.