{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Lightbox Gallery",
  "description": "Grid of photographs that expand to a full-viewport lightbox overlay on click.",
  "type": "object",
  "properties": {
    "items": {
      "type": "array",
      "title": "Photographs",
      "description": "Image entries with optional captions.",
      "x-editor": "array",
      "default": [],
      "items": {
        "type": "object",
        "properties": {
          "image": {
            "type": "string",
            "title": "Image",
            "description": "Photograph to display.",
            "x-editor": "media"
          },
          "caption": {
            "type": "string",
            "title": "Caption",
            "description": "Optional caption shown beneath the image and in the lightbox.",
            "x-editor": "text"
          }
        },
        "required": ["image"]
      }
    },
    "columns": {
      "type": "integer",
      "title": "Columns",
      "description": "Number of columns on desktop (2, 3, or 4).",
      "x-editor": "select",
      "enum": [2, 3, 4],
      "default": 3
    }
  }
}