.imgcontainer {
    width: 1100px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto;
}

.positive-gallery-slider {
    width: 100%;
    display: flex;
}

.positive-gallery-slider .side-img {
    flex-basis: 30%;
    display: flex;
    flex-direction: column;
}

.positive-gallery-slider .side-img img.small-preview {
    margin: 5px;
    width: 100%;
    cursor: pointer;
}

.zoom-image {
    flex: 1;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    image-rendering: -webkit-optimize-contrast; /* Chrome và Safari */
    image-rendering: -moz-crisp-edges; /* Firefox */
    image-rendering: crisp-edges; /* Tiêu chuẩn */
    /*  margin-left: 15px;*/
}

#test {
    height: 600px;
    overflow-y: auto;
    background-color: #F5F5F5;
    float: left;
   /* height: 300px;*/
    /*margin-bottom: 25px;*/
  /*  margin-left: 22px;
    margin-top: 40px;*/
/*    width: 65px;
    overflow-y: scroll;*/
}
#test::-webkit-scrollbar {
    width: 6px;
    background-color: #F5F5F5;
} 
.image-container img {
    height: 50px;
    width: 50px;
    object-fit: cover;
}

.popup-image {
    position: fixed;
    top: 0;
    left: 0;
    background: rgba(0, 0, 0, 0.9);
    height: 100%;
    width: 100%;
    z-index: 1000000;
    display: none;
}

.popup-image span {
    position: absolute;
    top: 0;
    right: 10px;
    font-size: 60px;
    font-weight: bolder;
    color: #fff;
    cursor: pointer;
    z-index: 100;
}
@media (max-width:768px) {

    .positive-gallery-slider .side-img {
        flex-basis: auto !important;
        display: flex !important;
        flex-direction: column !important;
    }
 
}