CSS Mixin/Macro Polyfill - Enhanced Examples

Demonstrating @mixin and @macro for complex, reusable style patterns

1. Responsive Border (@mixin with breakpoints)

					@mixin --responsive-border(--wide-width: 4px,
					--narrow-width: 1px, --border-color: #333) { @result {
					border: var(--narrow-width) solid var(--border-color);
					@media (width >= 1200px) { border-width: var(--wide-width);
					} } } .multi-border { @apply --responsive-border; }
				

This element has a responsive border that adapts to viewport width!

2. Responsive Margin with Auto Centering

					@mixin --responsive-margin(--large: 40px, --medium: 20px,
					--small: 10px) { @result { margin: var(--small) auto; @media
					(width >= 1024px) { margin: var(--large) auto; } } }
					.responsive-margin { @apply --responsive-margin; }
				

Responsive margins with conditional auto-centering

3. Dynamic Font (@mixin with font parameters)

					@mixin --dynamic-font(--large-size: 24px, --small-size:
					18px) { @result { font: 600 var(--small-size) / 1.4
					system-ui, sans-serif; @media (width >= 768px) { font-size:
					var(--large-size); } } } .dynamic-font { @apply
					--dynamic-font; }
				

This text uses a @mixin with responsive font size and line-height!

4. Theme-Aware Background (@mixin with dark mode)

					@mixin --theme-background(--light-bg: #ffffff, --dark-bg:
					#2d3748) { @result { background: var(--light-bg); @media
					(prefers-color-scheme: dark) { background: var(--dark-bg); }
					} } .conditional-background { @apply --theme-background; }
				

Background adapts to your system's color scheme preference

5. Layered Box Shadow (@macro)

					@macro --layered-shadow { box-shadow: 0 4px 6px rgba(0, 0,
					0, 0.1), 0 10px 15px rgba(0, 0, 0, 0.1), inset 0 1px 0
					rgba(255, 255, 255, 0.1); border-radius: 15px; }
					.layered-shadow { @apply --layered-shadow; }
				

Multiple shadow layers for enhanced depth, applied via @macro

6. Transform Hover (@mixin with reduced motion)

					@mixin --transform-hover(--scale: 1.05, --rotate: 2deg) {
					@result { transform: scale(var(--scale))
					rotate(var(--rotate)); @media (prefers-reduced-motion:
					reduce) { transition: none; transform: none; } } }
					.multi-transform { @apply --transform-hover; }
				

Hover me! Transform with accessibility-aware reduced motion

7. Adaptive Grid Layout (@mixin with column templates)

					@mixin --adaptive-grid( --cols-wide: repeat(4, 1fr),
					--cols-medium: repeat(2, 1fr), --cols-narrow: 1fr ) {
					@result { display: grid; grid-template-columns:
					var(--cols-narrow); @media (width >= 768px) {
					grid-template-columns: var(--cols-medium); } @media (width
					>= 1200px) { grid-template-columns: var(--cols-wide); } } }
				

Item 1

Item 2

Item 3

Item 4

Item 5

Item 6

8. Fancy Text Decoration (@macro)

					@macro --fancy-text { text-decoration: underline wavy
					#007acc; text-decoration-thickness: 2px; font-size: 18px;
					font-weight: 600; } .fancy-text { @apply --fancy-text; }
				

This text has decorative styling applied via @macro

9. Focus Outline (@macro)

					@macro --focus-outline { outline: 2px dashed #1976d2;
					outline-offset: 4px; } .focus-element { @apply
					--focus-outline; }
				

10. Animated Pulse (@mixin with reduced motion)

					@mixin --animated-pulse(--duration: 2s) { @result {
					animation: pulse var(--duration) cubic-bezier(0.4, 0, 0.2,
					1) infinite; @media (prefers-reduced-motion: reduce) {
					animation: none; } } } .animated-element { @apply
					--animated-pulse; }
				

Animated element with configurable timing that respects motion preferences