h1{
    text-align: center;
}

form, .principal{
    position: relative;
    padding: 50px 0px;
}

form>input[type="submit"], .principal>p, a.button{
    display: block;
    margin: 30px auto 10px auto;
}

.principal>p+p{
    margin-top: 10px;
}

.dcorreo{
    font-weight: bold;
}

@media screen and (min-width: 768px){
    form, .principal{
        max-width: 700px;
        margin: auto;
        padding: 50px;
    }
}

@media screen and (min-width: 1200px){
    body{
        background-color: rgb(255, 250, 244);
    }

    form, .principal{
        margin: 50px auto;
        background-color: white;
        border-radius: 16px 16px 16px 16px;
        box-shadow: 0px 0px 10px 1px rgba(0, 0, 0, 0.1);
    }
}