참고 링크
- CSS rest : http://cssreset.com
- W3C : http://www.w3.org/Style/CSS/
- W3C CSS Validation Service : https://jigsaw.w3.org/css-validator/#validate_by_uri
- MDN CSS reference : https://developer.mozilla.org/ko/docs/Web/CSS/CSS_Reference
SASS
- SASS : http://sass-lang.com
- SASS Guidelines(ko) : https://sass-guidelin.es/ko/
- Tool : https://prepros.io