Possible Values

• none [no border]
• hidden [same as none?]
• dotted [dotted border]
• dashed [dashed border]
• solid [solid border]
• double [Two borders, width of each is same as border-width value]
• groove [3D-like effect, depends on border-color value]
• ridge [3D-like effect, depends on border-color value]
• inset [3D inset border. effect, depends on border-color value]
• outset [3D outset border. effect, depends on border-color value]

div {
  border-top-style: dotted;
}

Inherited? NO!