Consider switching from CSS to Sass for optimal Angular Material theming

[nanotaboada]

Angular Material's theming APIs are built with Sass.

You can use Angular Material without Sass by using a pre-built theme, described in Using a pre-built theme below. However, using the library's Sass API directly gives you the most control over the styles in your application.

• https://material.angular.io/guide/theming
• https://m1.material.io/style/color.html#