.c-gallery{
    display: flex;
    align-items: flex-start;
    flex-wrap: nowrap;
    overflow: auto; 
    padding-bottom: 5px;
    margin-bottom: 10px;
    -webkit-overflow-scrolling: touch;
}
.c-gallery__img,
.c-gallery__item{
    display: block; 
    transition: opacity 250ms;
}
.c-gallery__item{
    flex: 0 0 auto;
    width: 150px;
    overflow: hidden;
    border: 1px solid #ccc;
    margin-right: 5px;
} 
.c-gallery__item:hover{
    opacity: 0.8;
}
.c-gallery__img{
    width: 100%;
    height: auto; 
}