html, body, main {
    height: 100%;
}

main {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    overflow-x: auto;
}

#main-content {
    display: flex;
    flex-flow: column;
    justify-content: space-evenly;
    align-items: center;
    width: 100%;
    margin: 30px auto;
}