border-radiusThe border-radius CSS property rounds the corners of the border drawn around an element.borders-outlinesBorders and outlineswidely2015-07-292018-01-29https://drafts.csswg.org/css-backgrounds-3/#cornersborder-radiushttps://developer.mozilla.org/docs/Web/CSS/Reference/Properties/border-radiuscss.properties.border-bottom-left-radiuscss.properties.border-bottom-left-radius.elliptical_cornerscss.properties.border-bottom-left-radius.percentagescss.properties.border-bottom-right-radiuscss.properties.border-bottom-right-radius.elliptical_cornerscss.properties.border-bottom-right-radius.percentagescss.properties.border-radiuscss.properties.border-radius.4_values_for_4_cornerscss.properties.border-radius.elliptical_borderscss.properties.border-radius.percentagescss.properties.border-top-left-radiuscss.properties.border-top-left-radius.elliptical_cornerscss.properties.border-top-left-radius.percentagescss.properties.border-top-right-radiuscss.properties.border-top-right-radius.elliptical_cornerscss.properties.border-top-right-radius.percentageshttps://nowyoucanuse.com/features--border-radius.html