.center {
    border: 1px solid #aaa;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 40px;
    border-radius: 20px;
    margin: 0px;
}

.center p{
    font-size: 30px;
    margin: 0;
}

.center span{
    top: 0px;
    padding: 0;
    margin: 0 0 40px 0;
}

@media (max-width:782px){
    .center {
        padding: 20px;
    }

    .center p{
        font-size: 20px;
        margin: 0;
    }
}