Add a realistic Santa hat to the person in the uploaded photo. Requirements: - Keep the original person's identity, face, hairstyle, skin tone, expression, pose, clothing, body shape, background, and camera angle unchanged. - Place one classic Christmas Santa hat naturally on the head of the main person. - The Santa hat should have realistic red velvet fabric, soft white fur trim, and a fluffy white pom-pom. - Make sure the hat fits the head correctly with accurate scale, angle, perspective, and placement. - Match the original lighting, shadows, color temperature, and image realism so the hat looks like it was actually worn in the original photo. - Preserve hair around the forehead, sides, and back naturally where visible. - Do not cover the eyes, eyebrows, or important facial features. - Keep the edit clean and focused: the main change should be adding the Santa hat only. Optional festive enhancement: - Add very subtle Christmas atmosphere only if it fits naturally, such as soft falling snow, tiny warm fairy lights, gentle festive bokeh, or a faint holiday glow. - These festive elements must remain secondary and should not change the original scene structure. Output style: - photorealistic - seamless image editing - natural integration - high detail - cvlean holiday portrait