.button-lane {
    margin-top: 20px;
    display: flex;
    justify-content: space-around;
}

.centered {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.margin-top {
    margin-top: 20px;
}

#gamecode {
    border: 3px solid black;
    padding: 5px 30px;
    font-size: 3em;
    margin: 10px;
}