.img-gallery{
    width: 80%;
    margin: 100px auto 50px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    grid-gap: 30px;
}
.img-gallery img{
    width: 100%;
    cursor: pointer;
}
.gallery-4{
    width: 80%;
    margin: 100px auto 50px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    grid-gap: 20px;
} 
.gallery-4 img{
    width: 100%;
    cursor: pointer;
}