#notificacion-emergente{position:fixed;top:80px;right:40px;background-color:#016b3a;color:white;padding:15px;border-radius:5px;box-shadow:0 4px 8px rgba(0,0,0,0.2);opacity:0;visibility:hidden;transition:opacity .5s,visibility .5s;z-index:1000}#notificacion-emergente.mostrar{opacity:1;visibility:visible}