h1 {

    max-width: 500px;
    padding: 15px;
    margin: auto;
    border: black solid;
    text-align: center;
}

h2 {
    background-color: blue
}

main>p:nth-child(2){
    background-color: lightblue;
    margin: auto;
    padding: 15px;
    max-width: 800px;
}