에릭 마이어의 reset CSS
https://meyerweb.com/eric/tools/css/reset/
normalize.css
https://getcssscan.com/css-box-shadow-examples
sanitize.css
https://csstools.github.io/sanitize.css/
CSS Remedy
방가방가^_^
https://meyerweb.com/eric/tools/css/reset/
https://getcssscan.com/css-box-shadow-examples
https://csstools.github.io/sanitize.css/