.ctx-container{max-width:760px;margin:18px auto;background:#fff;padding:20px;border-radius:10px;box-shadow:0 6px 18px rgba(0,0,0,0.06);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial;}
.ctx-header h1{margin:0;font-size:20px;text-align:center;color:#111;}
.ctx-puzzle{margin-top:8px;text-align:center;font-weight:600;color:#374151;}
.ctx-hints{margin-top:14px;padding:12px;border-radius:8px;background:#f8fafc;}
.ctx-hint{padding:10px;border-radius:6px;margin-bottom:8px;background:#fff;border:1px solid #e6edf3;color:#111;}
.ctx-reveal{margin-top:16px;text-align:center;}
.ctx-button{background:#111827;color:#fff;padding:10px 18px;border-radius:8px;border:none;font-weight:700;cursor:pointer;}
.ctx-tiles{display:flex;gap:8px;justify-content:center;margin-top:12px;flex-wrap:wrap;}
.ctx-tile{width:56px;height:56px;display:flex;align-items:center;justify-content:center;font-size:28px;font-weight:800;border-radius:8px;background:#d1fae5;color:#065f46;letter-spacing:2px;box-shadow:inset 0 -4px rgba(0,0,0,0.06);}
.ctx-empty{color:#6b7280;}
@media (max-width:480px){
  .ctx-tile{width:44px;height:44px;font-size:20px;}
  .ctx-container{padding:14px;margin:12px;}
}