body { 
  margin: 0; 
  overflow: hidden; 
  background: #000; 
  color: white; 
  font-family: 'Segoe UI', Arial, sans-serif; 
}

canvas { 
  display: block; 
  cursor: crosshair; 
}

#ui {
  position: absolute; 
  top: 10px; 
  right: 10px; 
  background: rgba(0,0,0,0.85);
  padding: 15px; 
  border-radius: 12px; 
  width: 360px; 
  z-index: 100;
  border: 1px solid #4a7c9c; 
  backdrop-filter: blur(2px);
  font-size: 0.9rem;
  pointer-events: auto;
  box-shadow: 0 4px 15px rgba(0,0,0,0.5);
}

/* ... resto do CSS do arquivo original ... */