-ah-border-connection-form: wedge;
When -ah-border-connection-form is wedge, all borders connect with a wedge shape. Connections form an X shape at cross-shaped intersections, and form a Y shape at T-intersections.
-ah-border-connection-form: precedence;
When -ah-border-connection-form is precedence, the thicker border is drawn to the edge. When intersecting borders have the same thickness, the border with the higher border priority is drawn to the edge.
For <div>, when ‘mixed’ or ‘wedge’ is specified, all border intersections are wedge-shaped, but when ‘precedence’ is specified, the shape depends on the relative priority of the borders.
-ah-border-connection-form: mixed;
-ah-border-connection-form: wedge;
-ah-border-connection-form: precedence;
-ah-border-connection-form: precedence;