:root {
    font-size: large;
    
}

body {
    background-color: gray;
    color:white;
}
h1 {
    text-align: center;
}

.div-centrado {
    background-color: white;
    color:black;
    border-radius: 10px;
    text-align: center;
    display:block;
    justify-content: center;
    width: 90%;
    margin:auto;
    padding: 5px;
}