:root{color-scheme:light;font-family:Courier New,Courier,monospace;background:radial-gradient(circle at top,#4d6448,#273229 42%,#151d16);color:#e8f4e7}*{box-sizing:border-box}body{margin:0;min-height:100vh;display:grid;place-items:center}.game-shell{width:min(94vw,560px);padding:1.5rem;border:2px solid #81a377;border-radius:12px;background:#101f0ed9;box-shadow:0 1.5rem 3rem #00000059}.game-header{display:flex;align-items:center;justify-content:space-between;gap:.75rem;margin-bottom:1rem;flex-wrap:wrap}.game-title{margin:0;font-size:clamp(1.4rem,3.5vw,2rem);letter-spacing:.08em}.score{font-size:1.1rem;font-weight:700}.game-board{display:grid;place-items:center;border:2px solid #57774f;background:#0b140b}canvas{width:100%;max-width:500px;aspect-ratio:1;display:block;image-rendering:pixelated}.game-over{margin:.9rem 0 0;color:#ffc673;font-weight:700;visibility:hidden}.game-over.visible{visibility:visible}.controls{display:flex;justify-content:space-between;align-items:center;margin-top:.85rem;gap:.75rem;flex-wrap:wrap}button{border:1px solid #9ecf8f;background:#193118;color:#e8f4e7;border-radius:8px;padding:.5rem .85rem;font:inherit;cursor:pointer}button:hover{background:#23461f}.help{opacity:.85;margin:0;font-size:.9rem}.mode{font-size:.9rem;opacity:.9}