.advanced-tools {
  background-color: #2a2a2a;
  border-radius: 8px;
  border: 1px solid #444;
  padding: 16px;
}

.advanced-tools h3 {
  margin: 0 0 16px 0;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tool-group {
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid #333;
}

.tool-group:last-of-type {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.tool-group h4 {
  font-size: 12px;
  color: #888;
  margin: 0 0 8px 0;
  text-transform: uppercase;
}

.tool-buttons {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tool-btn {
  flex: 1;
  min-width: 100px;
  background-color: #3a3a3a;
  color: #ffffff;
  padding: 10px 12px;
  font-size: 12px;
  font-weight: 500;
  border: 1px solid #555;
  transition: all 0.2s;
}

.tool-btn:hover:not(:disabled) {
  background-color: #4a4a4a;
  border-color: #666;
}

.tool-btn.active {
  background-color: #0066ff;
  border-color: #0066ff;
  color: white;
}

.tool-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.color-tolerance {
  margin-top: 10px;
  padding: 10px;
  background-color: #333;
  border-radius: 4px;
}

.color-tolerance label {
  display: block;
  font-size: 12px;
  color: #888;
  margin-bottom: 6px;
}

.color-tolerance input[type="range"] {
  width: 100%;
}

.tool-hint {
  font-size: 11px;
  color: #00ff00;
  margin-top: 8px;
  padding: 8px;
  background-color: rgba(0, 255, 0, 0.1);
  border-radius: 4px;
  text-align: center;
}

.cancel-mode-btn {
  width: 100%;
  margin-top: 12px;
  background-color: #ff4444;
  color: white;
  padding: 8px;
  font-size: 12px;
}

.cancel-mode-btn:hover {
  background-color: #cc0000;
}