:root{color-scheme:dark}*{box-sizing:border-box}body{margin:0;min-height:100vh;display:grid;place-items:center;background:#000;font:400 15px/1.5 -apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif}.stage{display:grid;place-items:center;padding:3rem 1.5rem}.scroll-key{width:min(74vmin,620px);aspect-ratio:1}.scroll-key__canvas{display:block;width:100%;height:100%;cursor:grab}.scroll-key__canvas:active{cursor:grabbing}