border-shapeThe border-shape CSS property sets the geometry of the border box, changing the shape of any applicable border, border image, focus outline, or shadow.limitedhttps://drafts.csswg.org/css-borders-4/#border-shapehttps://developer.mozilla.org/docs/Web/CSS/Reference/Properties/border-shapecss.properties.border-shapecss.properties.border-shape.nonehttps://nowyoucanuse.com/features--border-shape.html