html {
    background: black;
    height: 100%;
    overflow: hidden;
}

body {
    margin: 0;
    padding: 0;
    height: 100%;
}


* {
    margin: 0;
    padding: 0;
}
.imgbox {
    position: relative;
    display: grid;
    height: 100%;
}
.center-fit {
    max-width: 100%;
    max-height: 100vh;
    margin: auto;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -o-user-select: none;
    user-select: none;
}
#container {
    position: relative;
    display: grid;
    height: 100%;
}

#container canvas{
    position: absolute;
    max-width: 100%;
    max-height: 100vh;
    margin: auto;
}