* { margin:0; padding:0; box-sizing:border-box; }

html, body {
  margin: 0; padding: 0;
  width: 100%; height: 100%;
  background: #080818;
  overflow: hidden;
  font-family: 'Segoe UI', Arial, sans-serif;
}

#game {
  display: block;
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  border: 2px solid rgba(0, 150, 255, 0.15);
  border-radius: 6px;
  box-shadow:
    0 0 30px rgba(0, 150, 255, 0.08),
    0 0 80px rgba(0, 0, 0, 0.6);
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

#mobile-hint {
  display: none;
  position: fixed; bottom: 20px;
  color: rgba(255,255,255,0.5);
  text-align: center; font-size: 14px; line-height: 1.6;
}

@media (max-width: 920px) {
  #game { max-width: 100vw; max-height: auto; }
  #mobile-hint { display: block; }
}