:root{--neon:#2121ff;--yellow:#ff0;--bg:#000}*{box-sizing:border-box}html,body{color:#fff;background:#000;height:100%;margin:0;font-family:Courier New,monospace;overflow:hidden}.stage{flex-direction:column;justify-content:center;align-items:center;gap:12px;min-height:100%;padding:12px;display:flex}.screen{max-width:min(96vw,560px);max-height:92vh;position:relative}canvas#game{width:100%;height:auto;image-rendering:pixelated;border:2px solid var(--neon);background:#000;border-radius:6px;display:block;box-shadow:0 0 24px #2121ff73}.overlay{text-align:center;background:#000000d1;border-radius:6px;flex-direction:column;justify-content:center;align-items:center;gap:14px;padding:16px;display:flex;position:absolute;top:0;bottom:0;left:0;right:0}.overlay[hidden]{display:none}.overlay h1{letter-spacing:4px;color:var(--yellow);text-shadow:0 0 12px #ff09;margin:0;font-size:clamp(28px,7vw,52px)}.tag{color:#ffb8ff;margin:0;font-size:clamp(12px,3vw,16px)}.legend{color:#0ff;gap:8px;margin:6px 0;padding:0;font-size:clamp(11px,2.6vw,14px);list-style:none;display:grid}.key{color:#fff;background:#111;border:1px solid #555;border-radius:4px;padding:2px 6px;display:inline-block}.btn{letter-spacing:2px;color:#000;background:var(--yellow);cursor:pointer;border:none;border-radius:6px;margin-top:6px;padding:10px 26px;font-family:inherit;font-size:clamp(14px,3.4vw,18px);font-weight:700;transition:transform 80ms,box-shadow .2s}.btn:hover{box-shadow:0 0 16px #ffff00b3}.btn:active{transform:scale(.96)}.touch{flex-direction:column;align-items:center;gap:8px;display:none}.touch-row{gap:8px;display:flex}.tbtn{width:64px;height:64px;color:var(--yellow);border:2px solid var(--neon);background:#111;border-radius:8px;font-size:24px}@media (pointer:coarse){.touch{display:flex}}