:root{color-scheme:dark}
*{box-sizing:border-box}
html,body{margin:0;width:100%;height:100%;overflow:hidden;background:#000}
main{position:relative;width:100%;height:100svh;height:100dvh;overflow:hidden}
canvas{display:block;position:absolute;inset:0;margin:auto;pointer-events:none}
#canvas-action{position:absolute;inset:0;width:100%;height:100%;border:0;padding:0;background:transparent;cursor:grab;touch-action:none;-webkit-tap-highlight-color:transparent}
#canvas-action:focus-visible{outline:1px solid #555;outline-offset:-12px}
.fallback{position:absolute;inset:0;margin:auto;width:min(60vw,65vh,660px);height:auto;pointer-events:none}

#canvas-action.dragging{cursor:grabbing}