html {
    display:block;
    background-color: grey;
}
.canvas_container {
    border:rgb(102, 102, 102) .3em solid;
    margin:.3em;
    position: relative;
    width:512px;
    height:512px;
}
.layer {
    position:absolute;
    width: 512px;
    height: 512px;
}
section {
    display:inline-block;
}
/*.dark {
    background-color: #00FF00;
}
.light {
    background-color: #0000FF;
}*/

/*0 for dark mode*/

#layer0 {
    z-index: 2;
}

#circle_mask {
    z-index:999;
    pointer-events: none;
}