#toolbar {
  position: fixed; top: 50%; left: 12px; transform: translateY(-50%);
  display: flex; flex-direction: column; gap: 6px;
  background: rgba(20, 20, 30, 0.4);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px; padding: 8px 5px; box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.tool-btn {
  background: rgba(0, 0, 0, 0.3); 
  border: 1px solid rgba(255, 255, 255, 0.05); 
  color: #aaa; border-radius: 5px; padding: 8px 12px; 
  font-size: 11px; font-family: 'Courier New', monospace; 
  cursor: pointer; transition: all 0.15s;
}

.tool-btn:hover { background: rgba(255, 255, 255, 0.1); color: #fff; }
.tool-btn.active { background: #ff0033; color: #fff; border-color: #ff0033; }