How to create Shapes with Inner Curves using CSS Mask

Learn how to use CSS mask and various gradients to create complex shapes with inner curves. The guide provides a flexible and reusable code approach, eliminating the need for multiple elements or magic numbers. Detailed examples include creating an inverted radius shape and a notch shape, utilizing variables for customization. The process is explained step-by-step, ensuring an understanding of the logic behind the shapes rather than memorizing the code itself.