.alerta_bk{ position:fixed; top:0; right:0; bottom:0; left:0; background-color:rgba(45,45,45,0.90); z-index:200; }
.alerta_window{ position:absolute; top:200px; left:50%; width:600px; max-width:100%; margin-left:-300px; background-color:#FFF; color:#333; text-align:center; padding:40px; box-sizing:border-box; border-radius:4px; }
.alerta_content h2{ font-size:30px; font-weight: bold;}
.alerta_content p{ font-size:16px;}
.alerta_ok{ display:block; padding:14px 22px; background-color:#016b01; color:#FFF; text-align:center; font-size:18px; text-decoration:none;}

@media screen and (max-width: 600px) {
	.alerta_window{ position:absolute; top:100px; left:10px; right:10px; width:auto; max-width:100%; margin-left:0px; }
}