.gallery {
    display: flex;
    flex-wrap: wrap;
}

.gallery img {
    width: 200px;
    height: 150px;
    margin: 10px;
    cursor: pointer;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1;
    padding: 20px;
    background-color: #000;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.modal-content {
    max-width: 100%;
    max-height: 100%;
    margin: auto;
    display: block;
}

.close {
    color: #fff;
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 30px;
    cursor: pointer;
}