.triangle{border-top-color:#c8c8c8;border-bottom-color:#c8c8c8;border-left:4px solid transparent;border-right:4px solid transparent;margin-bottom:1px;margin-left:2px;display:inline-block}.triangle.up{border-bottom-width:6px}.triangle.down{border-top-width:6px}.triangle.active{border-top-color:#777;border-bottom-color:#777}