@mixin margin($block-start, $inline-end, $block-end, $inline-start) { @include margin-left($inline-start); @include margin-right($inline-end); margin-top: $block-start; margin-bottom: $block-end; } @mixin padding($block-start, $inline-end, $block-end, $inline-start) { @include padding-left($inline-start); @include padding-right($inline-end); padding-top: $block-start; padding-bottom: $block-end; } @mixin margin-left($value) { @supports (margin-inline-start: $value) { margin-inline-start: $value; } @supports not (margin-inline-start: $value) { margin-left: $value; } } @mixin margin-right($value) { @supports (margin-inline-end: $value) { margin-inline-end: $value; } @supports not (margin-inline-end: $value) { margin-right: $value; } } @mixin padding-left($value) { @supports (padding-inline-start: $value) { padding-inline-start: $value; } @supports not (padding-inline-start: $value) { padding-left: $value; } } @mixin padding-right($value) { @supports (padding-inline-end: $value) { padding-inline-end: $value; } @supports not (padding-inline-end: $value) { padding-right: $value; } }