:root{
  --bg1:#0b0b0f;
  --bg2:#0f0620;
  --accent1:#7c3aed;
  --accent2:#00e5ff;
  --glass: rgba(255,255,255,0.04);
  --glass-border: rgba(255,255,255,0.06);
  --text: #e6eef8;
  --muted: rgba(230,238,248,0.75);
}
*{box-sizing:border-box}
html,body,#root{height:100%}
body{
  margin:0;min-height:100vh;font-family:Inter,system-ui,Segoe UI,Roboto,Arial,sans-serif;color:var(--text);
  background: radial-gradient(1200px 600px at 10% 10%, rgba(124,58,237,0.08), transparent 10%),
              radial-gradient(1000px 500px at 90% 90%, rgba(0,229,255,0.06), transparent 10%),
              linear-gradient(180deg,var(--bg1),var(--bg2));
  display:flex;align-items:center;justify-content:center;overflow-x:hidden;
}
.app{width:100%;max-width:1100px;padding:28px}
.hud{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px;padding:10px;border-radius:12px}
.brand{font-family:Orbitron,monospace;font-weight:700;font-size:1.1rem;color:var(--accent2);text-shadow:0 6px 18px rgba(0,229,255,0.05)}
.score{font-weight:600;color:var(--muted)}
.stage{display:flex;justify-content:center;align-items:center;position:relative}
canvas#gameCanvas{display:block;width:min(720px,90vw);height:auto;border-radius:18px;box-shadow:0 12px 40px rgba(2,6,23,0.6);background:linear-gradient(180deg,#061021 0%, #07214a 50%, #1b0731 100%);} 

.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;pointer-events:none;opacity:0;transition:all 320ms cubic-bezier(.2,.9,.2,1)}
.overlay.visible{opacity:1;pointer-events:auto}
.card{width:320px;background:var(--glass);backdrop-filter:blur(8px);border-radius:14px;padding:22px;text-align:center;box-shadow:0 12px 40px rgba(2,6,23,0.6);border:1px solid var(--glass-border)}
.card h1{margin:0;font-size:28px;font-family:Orbitron,monospace}
.card h2{margin:0;font-size:22px}
.muted{color:var(--muted);margin-top:8px}
.btn{margin-top:18px;padding:10px 18px;border-radius:10px;border:1px solid rgba(255,255,255,0.06);background:transparent;color:var(--text);font-weight:700;cursor:pointer;transition:all .25s}
.btn.primary{background:linear-gradient(90deg,var(--accent1),var(--accent2));color:#030312;box-shadow:0 8px 30px rgba(7,23,41,0.6)}
.btn.ghost{background:transparent;color:var(--text);border:1px solid rgba(255,255,255,0.06)}
.hint{font-size:13px;margin-top:12px;color:var(--muted)}
.meta{margin-top:22px;text-align:center;font-size:13px}

/* Responsive tweaks */
@media (max-width:520px){
  .card{width:88vw;padding:16px}
  .btn{width:100%}
}

/* Game over transition */
#gameOverOverlay .card{transform:scale(.98);transition:transform 280ms ease}
#gameOverOverlay.visible .card{transform:scale(1)}

/* Reveal / neon */
.glass{background:var(--glass);border:1px solid var(--glass-border);box-shadow:0 6px 30px rgba(0,0,0,0.6);border-radius:12px}

/* Particles canvas placeholder */
.bg-overlay{position:fixed;inset:0;z-index:0;pointer-events:none}

/* Subtle focus styles */
button:focus{outline:2px solid rgba(255,255,255,0.06);outline-offset:2px}

/* Exit / Home button for game pages */
.exit-btn{position:absolute;left:12px;top:12px;z-index:80;padding:8px 10px;border-radius:8px;background:rgba(255,255,255,0.96);color:#06060a;text-decoration:none;font-weight:700;box-shadow:0 10px 30px rgba(2,6,23,0.6)}
.exit-btn:hover{transform:translateY(-3px)}

/* Touch controls for snake game */
.touch-controls{position:absolute;right:16px;bottom:18px;display:flex;flex-direction:column;gap:8px;align-items:center;z-index:90}
.tc-row{display:flex;gap:8px}
.tc-btn{width:56px;height:56px;border-radius:10px;border:0;background:rgba(255,255,255,0.08);color:var(--text);font-size:20px;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 24px rgba(3,16,24,0.5);backdrop-filter:blur(4px)}
.tc-btn:active{transform:translateY(2px)}

@media (max-width:520px){
  .tc-btn{width:48px;height:48px;font-size:18px}
  .touch-controls{right:10px;bottom:12px}
}