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How do variables and mixins work in Sass

variables mixins Sass CSS reusable styles DRY

What are CSS preprocessors (Sass, LESS) and their benefits

CSS preprocessors Sass LESS benefits of Sass benefits of LESS web development

How to reduce render-blocking CSS

Reduce render-blocking CSS optimize load time web performance critical CSS.

What is CSS minification and concatenation

CSS minification concatenation web performance optimization file size reduction

How do you inline critical CSS

Critical CSS inlining CSS web performance

What is critical CSS and why does it matter

Keywords: Critical CSS performance optimization web development SEO page load speed

How to optimize images for the web

optimize images image compression web performance SEO responsive images

What is the `picture` element and when to use it

Keywords: picture element responsive images HTML web development art direction

How do you lazy-load images

lazy-load image optimization website performance SEO page speed

What is responsive images (`srcset` and `sizes`)

Keywords: responsive images srcset sizes HTML web development performance optimization

How do you hide content for sighted users but keep it accessible to screen readers

Keywords: accessible screen reader content hiding

How to create keyboard-navigable menus

keyboard-navigable menus accessible navigation HTML menu example CSS dropdown menu

What are ARIA attributes and when to use them

ARIA attributes web accessibility assistive technology semantic HTML

How do you make forms accessible

accessible forms web accessibility semantic HTML ARIA roles form labels

What is accessibility (a11y) in HTML/CSS

accessibility a11y HTML CSS web accessibility WCAG assistive technologies semantic HTML alt tags

How do you use icon fonts or SVG icons

icon fonts SVG icons web design scalable graphics CSS customization

What are system fonts vs web fonts

system fonts web fonts typography web design font loading

What is `@font-face` and how to use it

@font-face custom fonts web typography font loading

How do you include fonts (web fonts) in a website

Keywords: web fonts typography Google Fonts Adobe Fonts CSS

What is graceful degradation

graceful degradation web design responsive design user experience