:root{color:#f7f0dc;background:#161b24;font-family:system-ui,sans-serif;font-synthesis:none}*{box-sizing:border-box}body{min-width:320px;min-height:100vh;margin:0;display:grid;place-items:center;background:radial-gradient(circle at 50% 20%,#34445c,#131720 70%)}main{width:min(100%,720px);padding:20px;text-align:center}canvas{display:block;width:100%;height:auto;aspect-ratio:4 / 3;border:1px solid #69788c;box-shadow:0 16px 48px #0009;background:#172637;touch-action:none}.help{margin:12px auto 0;color:#bac7d7;font-size:.9rem}button{margin-top:10px;padding:8px 16px;font:inherit;cursor:pointer}.game-surface{position:relative}#loading-screen{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:20px;background:#172637}#loading-screen[hidden]{display:none}#loading-progress{width:min(85%,360px);height:20px;accent-color:#8ed6b4}button:disabled{cursor:default;opacity:.5}