body, html {
    margin:0;
    padding:0;
    height:100%;
    overflow:hidden;
}


.center-container {
    display:flex;
    justify-content:center;
    align-items:center;
    width:100vw;
    height:100vh;
}


.center-container img {
    max-width:90%;
    max-height:90vh;
    object-fit:contain;
}


.sungsoo {
    position:fixed;
    right:5px;
    bottom:5px;
    color:grey;
}


img:hover {
    cursor: pointer;
}


* {
    user-select: none;
}