:root{--primary:#C1FF00;--bg-dark:#050505;--text:#ffffff;--panel:#101010;--panel-border:#262626}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at 20% 15%,#161616 0,#090909 52%,var(--bg-dark) 100%);color:var(--text);font-family:'Courier New',monospace;display:flex;align-items:center;justify-content:center;padding:72px 16px 24px;touch-action:manipulation}.back-btn{position:fixed;top:16px;left:16px;color:var(--primary);text-decoration:none;font-size:.85rem;z-index:100}.screen{width:min(860px,100%)}.hidden{display:none}.card{border:3px solid #0c0c0c;background:rgba(255,255,255,.94);border-radius:16px;box-shadow:0 16px 0 #0c0c0c;color:#0c0c0c;padding:24px;text-align:center}.card h1,.card h2{margin:0 0 12px;color:var(--primary);text-transform:uppercase;text-shadow:2px 2px #0c0c0c}.card p{margin:0 0 16px;font-weight:700}button{background:#c1ff00;color:#0c0c0c;border:3px solid #0c0c0c;font-weight:700;cursor:pointer;padding:12px 24px;font-size:1rem;border-radius:8px;font-family:inherit;box-shadow:4px 4px 0 #0c0c0c;text-transform:uppercase}button:active{transform:translate(4px,4px);box-shadow:none}.game-layout{display:grid;grid-template-columns:auto 180px;gap:14px;align-items:start;justify-content:center}#gameCanvas{background:#050505;border:3px solid #0c0c0c;border-radius:12px;box-shadow:0 12px 0 #0c0c0c;max-width:100%;height:auto}.sidebar{display:grid;gap:10px}.panel{background:var(--panel);border:2px solid var(--panel-border);border-radius:12px;padding:10px;text-align:center}.label{font-size:.7rem;letter-spacing:.08em;color:#7d7d7d;margin-bottom:4px}#bestScore,#level,#score{color:var(--primary);font-size:1.6rem;font-weight:700;line-height:1.1}#nextCanvas{border:1px solid #2f2f2f;border-radius:8px;background:#060606}#mobileControls{display:none;justify-content:center;gap:8px;padding:12px;flex-wrap:wrap}.ctrl-btn{width:56px;height:56px;font-size:1.4rem;background:#c1ff00;color:#0c0c0c;border:3px solid #0c0c0c;border-radius:8px;font-weight:700;cursor:pointer;box-shadow:3px 3px 0 #0c0c0c;font-family:inherit;padding:0;text-transform:none}.ctrl-btn:active{transform:translate(3px,3px);box-shadow:none}@media (max-width:900px){body{align-items:flex-start;padding-top:64px}.game-layout{grid-template-columns:1fr;justify-items:center}.sidebar{width:min(420px,100%);grid-template-columns:repeat(4,minmax(0,1fr))}.panel{min-height:96px;display:flex;flex-direction:column;justify-content:center}#mobileControls{display:flex}}@media (max-width:520px){body{padding-inline:8px}.screen{width:100%}.sidebar{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.card{padding:20px 14px}#gameCanvas{width:min(96vw,420px)}}