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Curved/Custom DIV Shape Tutorial - CSS & SVG - YouTube
html - How to create a box with rounded corners at the top, but normal corners at the bottom? - Stack Overflow
Chris Coyier on Twitter: "Yanking one corner of `border-radius` off makes it kinda speech-bubbly in a fun way. And might as well do it with logical properties. @CodePen: https://t.co/0TUEEMUaji https://t.co/UAr3KHRQUO" / Twitter