HTML

Document structure (doctype, html/head/body) ★ recommended

Semantic tags (main/nav/section/article) ★ recommended

Headings hierarchy (h1–h6) ★ recommended

Lists, tables basics ★ recommended

Links and navigation patterns ★ recommended

Inputs types and constraints ★ recommended

Labels, fieldsets, accessibility basics ★ recommended

Native validation basics ★ recommended

File inputs basics ★ recommended

Form UX patterns overview ★ recommended

Images: srcset/sizes basics ★ recommended

Picture element overview ★ recommended

Audio/video basics ★ recommended

iframes and embeds overview ★ recommended

Performance considerations overview ★ recommended

Keyboard navigation basics ★ recommended

Focus management basics ★ recommended

ARIA overview (when needed) ★ recommended

Alt text and captions ★ recommended

Common a11y pitfalls checklist ★ recommended

Build 3-page semantic layout ★ recommended

Create a complex form ★ recommended

Make a11y review with Lighthouse ★ recommended

SEO-friendly markup checklist ★ recommended

Mini project: blog post template ★ recommended