main {
    display: flex;
    flex-wrap: wrap;
    align-content: center;
    justify-content: center;
    min-height: 100vh;
}

section {
    border: 2px solid black;
    margin: 2rem;
    padding: 1rem;
}

#join, #play, #new {
    display: flex;
    flex-direction: column;
}