#container {
    margin: 7rem 3rem;
    width: calc(100% - 6rem);
}

#container > div > blockquote {
    margin-bottom: 0;
}

#nav {
    text-align: center; 
    margin-bottom: 7rem;
}

#nav a.active {
    color: inherit;
    cursor: inherit;
}

#responseContainer > div {
    font-size: 3rem;
    text-align: center;
    line-height: 2rem;
    padding-bottom: 2rem;
    margin-top: 2rem;
}

#responseContainer > div > a > div {
    line-height: 1;
}

#responseContainer > div > small {
    font-size: 50%;
}

.row .column.column-input {
    flex: 0 0 100%;
    max-width: 100%;
}

.row .column.column-button {
    flex: 0 0 100%;
    max-width: 100%;
    text-align: center;
}

@media (min-width: 40rem) {
    #container {
        margin: 7rem auto;
        width: 66rem;
    }

    .row .column.column-input {
        flex: 0 0 70%;
        max-width: 70%;
    }

    .row .column.column-button {
        flex: 0 0 30%;
        max-width: 30%;
    }
}