.main-div {
    margin: 0 auto;
}

.main-div h1, h2 {
    text-align: center;
}

#title {
    text-align: center;
}

#nd1 {
    margin: 0 auto;
    margin-left: auto;
    margin-right: auto;
    max-width: 100%;
    max-height: 100%;
}

#together {
    display: flex;
    margin: 0 auto;
    text-align: center;
    margin: 20px;
    overflow: hidden;
}

#togetherpicture {
    display: block;
    margin-left: auto;
    margin-right: auto;
    max-width: 100%;
    max-height: 67vh;
}