What does % mean in SASS?
https://sass-lang.com/documentation/style-rules/placeholder-selectors Placeholder Selectors: %foo Sass supports a special type of selector called a “placeholder selector”. These look like class and id selectors, except the # or . is replaced by %. They’re meant to be used with the @extend directive; for more information see @extend-Only Selectors. On their own, without any use of @extend, rulesets … Read more