body {
    box-sizing: border-box;
}

img {
    /*max-width: 100%;*/
    max-height: 800px;
    object-fit: cover;
}

.slider_wrap {
    position: relative;
}

.thumbnail_slider_area{
    position: absolute;
    left: 0;
    bottom: 0;
    width: 80%;
    z-index: 1;
}

.thumbnail_slider img{
    border: 3px solid #0f0;
    max-width: 200px;
    max-height: 150px;
}