body {
    font-family:'Roboto', sans-serif;
}
header, main, footer{
    max-width: 640px;
    margin:1rem auto;
    border: 1px solid rgba(143, 161, 192, 0.844);
    padding:10px;
    background-color: rgb(200, 212, 233);
}
main{
    display: grid;
    grid-template-columns:1fr;
    grid-gap:1rem;

}
section{
    background-color: white;
    padding: 20px;
}