.centrarBloque200px {
    display:block;
    margin:0 auto;
    width: 100%;
    max-width: 200px;
}

.centrarBloque400px {
    position: absolute;
    top: 30%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    max-width: 400px;
}
.centrarBloque600px {
    position: absolute;
    top: 30%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    max-width: 600px;
}


.gray {
    font-size: 80%;
}
h1{
    margin-bottom: 50px;
    color:#707173 !important;
}
label {
    margin-top: 20px;
    color: #707173 !important;
}
.txtEmail{
    width:70%;
}
.btn{
   vertical-align:initial;
    width:100px;
}