aria-patterns

# ARIA Patterns & Keyboard Interaction Reference

## Landmark Roles

Every page should have these landmarks:

```html
<header role="banner">         <!-- Site header — once per page -->
<nav role="navigation">         <!-- Navigation — can have multiple with aria-label -->
<main role="main">              <!-- Main content — once per page -->
<aside role="complementary">    <!-- Sidebar — related but not essential -->
<footer role="contentinfo">     <!-- Site footer — once per page -->
<form role