border-radius: 10px;
All corners equal
border-radius: 10px 20px;
Top-left/bottom-right, top-right/bottom-left
border-radius: 10px 20px 30px;
Top-left, top-right/bottom-left, bottom-right
border-radius: 10px 20px 30px 40px;
Top-left, top-right, bottom-right, bottom-left
