#overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.5);
        display: none;
        justify-content: center;
        align-items: center;
        z-index: 9999;
    }

    /* 중앙 이미지 */
    #popupImg {
        max-width: 80%;
        max-height: 80%;
        cursor: pointer;
        box-shadow: 0 0 20px #000;
    }