contorno redondo CSS
/*A box-shadow can be used for a similar effect*/
.your-box-or-button-class{
box-shadow: 0 0 3px #000000;
}
Powerful Penguin
/*A box-shadow can be used for a similar effect*/
.your-box-or-button-class{
box-shadow: 0 0 3px #000000;
}