*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
.positive-gallery-slider{
    width: 100%;
    display: flex;
}
.positive-gallery-slider .side-img{
    flex-basis: 30%;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.positive-gallery-slider .side-img img.small-preview{
    margin: 0;
    width: 100%;
    cursor: pointer;
}
.zoom-image{
    flex: 1;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    margin-left: 15px;  
}