.alerta {
 padding: 25px;
 border: 1px solid gray;
 border-radius: 3px;
 margin: 20px;
 font-size: 18px;
}
.error {
 border-color: #e8273b;
 color: #FFF;
 background-color: #ed5565;
}
.sucesso {
 border-color: #87c940;
 color: #FFF;
 background-color: #a0d468;
}
.atencao {
 border-color: #f4a911;
 color: #FFF;
 background-color: #f6bb42;
}
.info {
 border-color: #2f80e7;
 color: #FFF;
 background-color: #5d9cec;
}