html{
    height: 100%;
    display: flex;
    flex-direction: column;
}

body{
    height: 100%;
    display: flex;
    flex-direction: column;
}

.cFondo{
    background: white;
    background-image: url("loginfondo.jpg");
    background-position: center;
    background-size: cover;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.cForm{
    background: rgba(255, 255, 255, 0.5);
    max-width: 400px;
}
.cForm img{
    padding: 10px;
}