.main-img {
    max-width: 600px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    margin: 0 auto;
}
.main-img .oneImg,
.main-img .twoImg,
.main-img .ThreeImg{
    margin: 0 15px;
    border: 2px solid var(--primaryColor);
    border-radius: 10px;
    padding: 5px;
    max-width: 270px;    
    max-height: 270px;
}
.main-img .ThreeImg {    
    margin: -40px 0 0px 0;
}
.main-img img {    
    height: 100%;
    width: 100%;
    object-fit: cover;  
    border-radius: 8px;  
}

@media screen and (max-width:767px) {
    .main-img .oneImg, .main-img .twoImg{
        margin: 0 10px;
    }
}

@media screen and (max-width:639px) {
    .main-img .oneImg, .main-img .twoImg, .main-img .ThreeImg {
        max-width: 190px;
    }
}

@media screen and (max-width:479px) {
    .main-img .oneImg, .main-img .twoImg, .main-img .ThreeImg {
        width: 100%;
        max-height: 100%;
        max-width: 100%;
        margin: 0 0 15px 0;
    }
    .main-img .ThreeImg {
        margin:0;
    }
}