:root{color-scheme:dark;font-family:Arial,Helvetica,sans-serif;background:#060809;color:#e5ebea}
*{box-sizing:border-box}body{margin:0;min-height:100svh;background:radial-gradient(ellipse at 50% 40%,#1a2424 0,#060809 70%)}
main{display:flex;align-items:center;flex-direction:column;min-height:100svh;justify-content:center;padding:8px 12px}
#stage{position:relative;max-width:100%;line-height:0;box-shadow:0 20px 90px #0008}
canvas{display:block;width:min(540px,calc((100svh - 80px)*.5625),calc(100vw - 24px));height:auto;touch-action:none;outline:none;cursor:crosshair;border:1px solid #ffffff13}
canvas:focus-visible{outline:2px solid #00ffd1;outline-offset:3px}
.controls{display:flex;gap:8px;margin:12px 0 4px;flex-wrap:wrap;justify-content:center}
button{font:inherit;font-size:14px;min-height:38px;border:1px solid #ffffff25;border-radius:5px;background:#101717;color:#c8d3d1;padding:8px 13px;cursor:pointer}
button:hover,button:focus-visible{border-color:#00ffd1;color:#00ffd1}button:disabled{opacity:.45;cursor:wait}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
#fallback{position:absolute;inset:20%;line-height:1.6;font-size:20px}
details{width:min(640px,100%);line-height:2;font-size:14px;padding:12px}input{width:75px;padding:6px;background:#172020;color:white;border:1px solid #536363}output{display:block}summary{cursor:pointer}
@media(max-width:380px){button{font-size:12px;padding:8px}main{padding:4px}.controls{gap:5px}canvas{width:min(calc((100svh - 80px)*.5625),calc(100vw - 8px))}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto}}