main {
    margin: 20px auto;
    width: max(200px, 80vw);
    padding: 2vw 3vw;
    background: #ffffff;
    justify-content: center;
    border: 1px solid #ddd;
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    font-size: larger;
}

main * {
    margin-bottom: 0;
}

main h2 {
    margin-top: 10px;
}

main h1 {
    text-align: center;
}

main pre {
    width: 70vw;
    padding: 2vw;
    border: 1px solid #ddd;
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    align-self: center;
    align-content: center;

}

.spacer {
    height: 4em;
    width: 100vw;
    overflow: hidden;
}