Links e Referências:
- https://tableless.com.br/utilizando-mixins-em-css-preprocessors/
- https://css-tricks.com/css-custom-properties-theming/
- https://www.w3.org/TR/css-variables/
- https://www.w3.org/TR/css-variables/
- https://css-tricks.com/making-custom-properties-css-variables-dynamic/
- https://developer.mozilla.org/en-US/docs/Web/CSS/Using_CSS_variables
- http://maujor.com/tutorial/variaveis-nas-css.php
- https://www.youtube.com/watch?v=NAp1FX9mGPU&list=PLgcWRW66amTnK9RhsViFHd3B7-pUW02U1