.mySlides {
    max-height: 100%;
    max-width: 100%;
    position: relative;
}

.mySlidesC {
    display: none;
    height: 600px;
    max-width: 100%;
    position: relative;
    transition: all .5s;
}

.gallery-btn{
    height: 35px;
    width: 50px;
}

.mySlidesC h3 {
    position: absolute;
    bottom: 20px;
    left: 0;
    right: 0;
    background-color: rgba(97, 97, 97, 0.5);
    padding: 10px 0 10px 0;
    color: white;
}

@media only screen and (max-width: 550px){
    .mySlidesC {
        height: 300px !important;
    }
}