"Design a realistic, spacious house carved into a colossal tree trunk. The trunk should stand upright with a flattened top, wide enough for multiple rooms. Carve doors and windows into the bark, some with rounded frames. Add wooden balconies jutting out at varying heights. Integrate a winding exterior staircase that wraps around the trunk. Use a small roof over the main entrance—made of curved, overlapping wooden shingles. Include gnarled roots at the base, creating a natural foundation."