:root{--primary:#C1FF00;--bg-dark:#050505;--text:#ffffff;--panel:#111111;--line:#262626}*{box-sizing:border-box}body{margin:0;min-height:100vh;font-family:"Courier New",Courier,monospace;color:var(--text);background:radial-gradient(circle at 14% 12%,#1a1a1a 0,transparent 38%),radial-gradient(circle at 86% 88%,#101010 0,transparent 34%),var(--bg-dark);touch-action:manipulation}.back-btn{position:fixed;top:16px;left:16px;color:var(--primary);text-decoration:none;border:2px solid #333;border-radius:8px;background:rgba(7,7,7,.9);padding:8px 12px;z-index:20}.game-shell{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:72px 14px 18px}.screen{width:min(540px,100%)}.hidden{display:none}.card,.card-lite{border-radius:14px;border:2px solid var(--line)}.card{text-align:center;background:rgba(255,255,255,.95);color:#0c0c0c;border:3px solid #0c0c0c;box-shadow:0 16px 0 #0c0c0c;padding:24px}.card h1,.card h2{margin:0 0 12px;color:var(--primary);text-transform:uppercase;text-shadow:2px 2px #0c0c0c}.card p{margin:0 0 14px;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}.hud{background:linear-gradient(180deg,#121212,#090909);display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 14px;padding:12px;margin-bottom:10px;font-size:.92rem}.hud span{color:var(--primary);font-weight:700}.canvas-wrap{background:linear-gradient(180deg,#101010,#080808);padding:10px}#gameCanvas{width:100%;display:block;background:var(--bg-dark);border-radius:10px}.legend{margin:10px 0 0;color:#9f9f9f;font-size:.82rem;text-align:center}.result-line{font-size:1.05rem}@media (max-width:600px){.game-shell{align-items:flex-start;padding-top:66px}.screen{width:min(460px,100%)}.hud{font-size:.85rem;gap:6px 10px}.back-btn{font-size:.85rem}}