1.Border radius
The border-radius property can be used to
working clockwise from top-left set border-top-left-radius/border-top-right-radius/border-bottom-right-radius/border-bottom-left-radius
-webkit-border-radius and -moz-border-radius ,old browser
2.border-radius: 50px/100px;
specify different horizontal and vertical radiiii by splitting values with a “/”.