.max-width-fit-content {
    max-width: fit-content;
    min-width: 320px;
    margin-left: auto;
    margin-right: auto;
    flex: 1 1 auto;
}

.max-width-800px {
    max-width: 800px;
    min-width: 320px;
    margin-left: auto;
    margin-right: auto;
    flex: 1 1 auto;
}

.max-width-400px {
    max-width: 400px;
    min-width: 320px;
    margin-left: auto;
    margin-right: auto;
    flex: 1 1 320px;
}