div.boton-cerrar-navbar {
  height: 45px;
  margin-top: 2px;
  background-color: red;
  overflow-y: hidden;
  border-radius: 5px;
  border: 1px solid black;
}

div.boton-cerrar-navbar:hover {
  cursor: pointer;
}

div.boton-cerrar-navbar i.fa-times {
  margin-top: -8px;
  color: white;
}