.Main-title {
    text-align: center;
}

.Images {
    width: 100% ;
}

.row {
    display: flex;
    justify-content: center;

    width: 100%;
    height: 50vh;
}

.thumbnail {
    width: 23%;
    margin: 5px;
    background-size: cover;
    background-position: top;
}

.Images {
    display: flex;
    flex-direction: column;
}





#img1 {
    background-image: url('../images/1.png');
}

#img2 {
    background-image: url('../images/2.png');
}

#img3 {
    background-image: url('../images/3.png');
}

#img4 {
    background-image: url('../images/4.png');
}

#img5 {
    background-image: url('../images/5.png');
}

#img6 {
    background-image: url('../images/6.png');
}

#img7 {
    background-image: url('../images/7.png');
}

#img8 {
    background-image: url('../images/8.png');
}

#img9 {
    background-image: url('../images/9.png');
}

#img10 {
    background-image: url('../images/10.png');
}

#img11 {
    background-image: url('../images/11.png');
}

#img12 {
    background-image: url('../images/12.png');
}