Photorealistic Architectural Edit: Couple in Window

{
  "generation_request": {
    "meta_data": {
      "tool": "NanoBanana Pro",
      "task_type": "photoreal_architecture_lifestyle_editorial_edit",
      "version": "v1.0_WINDOW_COUPLE_CLOSEUP_WINE_YELLOW_FACADE_FLOWERS",
      "priority": "highest"
    },
    "references": {
      "reference_image_1": {
        "source": "UPLOAD_REFERENCE_IMAGE (REQUIRED)",
        "purpose": "BASE_ARCHITECTURE + PERSPECTIVE + WINDOW_PLACEMENT_LOCK",
        "strict_lock": true,
        "lock_strength": "high",
        "preserve_perspective": true,
        "preserve_building_geometry": true,
        "preserve_window_position": true,
        "preserve_overall_framing": true,
        "no_layout_drift": true
      }
    },
    "output_settings": {
      "aspect_ratio": "match_reference",
      "orientation": "portrait",
      "resolution": "ultra_high_res",
      "render_style": "ultra_photoreal_editorial",
      "sharpness": "crisp_but_natural",
      "film_grain": "subtle_analog",
      "color_grade": "clean_filmic_warm",
      "retouch_level": "editorial_minimal_keep_texture",
      "noise_reduction": "low"
    },
    "hard_constraints": [
      "Photorealistic only (no illustration, no CGI).",
      "Keep the same building perspective and window placement as the reference.",
      "Do not warp architecture lines; keep straight edges and realistic proportions.",
      "Exactly TWO people in the window only; no extra people anywhere else.",
      "Remove any existing watermark/text from the reference; output must contain NO text, NO logos, NO watermarks.",
      "Hands and wine glasses must be anatomically correct and physically plausible."
    ],
    "creative_prompt": {
      "scene_summary": "Edit the reference photo of the European building facade (tall portrait). Keep the same perspective, window placement, and architectural geometry.\n\nKey edits:\n1) Building facade color: Change the main facade (currently blue) to a {argument name="facade color" default="warm, rich yellow painted plaster"}, realistic texture, slightly weathered, European old-town vibe.\n2) Window couple emphasis: Make the couple in the open window appear closer and more prominent (a subtle zoom/crop or optical framing adjustment that brings them forward), while still keeping the window in the same location on the building.\n3) Couple mood & props: The couple is happy and smiling, looking at each other with warm, joyful expressions. Each holds a wine glass (clear stemware) with red or white wine. Natural hand grip, correct reflections and refraction in glass.\n4) Flowers: Add tasteful flowers around the window area (e.g., a small window box or pots with blooming flowers such as {argument name="flower type" default="geraniums"}), and optionally subtle greenery climbing or placed nearby—must look natural and consistent with the architecture.\n\nLighting & realism:\n- Preserve the original time-of-day feel and ambient light; keep it realistic and soft.\n- Ensure natural skin tones and fabric textures; no plastic smoothing.\n- Maintain realist