{
  "$schema": "https://openpresentation.org/schema/opf/v1",
  "name": "Design Background Variants",
  "description": "Technical fixture for background shorthand and object forms.",
  "design": {
    "theme": "minimal",
    "colorScheme": {
      "id": "cool-horizon",
      "primary": "#2563EB",
      "accent": "#14B8A6",
      "background": "#F8FAFC",
      "text": "#0F172A"
    },
    "fontScheme": {
      "id": "aptos",
      "heading": {
        "family": "Aptos Display",
        "weight": 700
      },
      "body": {
        "family": "Aptos",
        "weight": 400
      }
    },
    "dimensions": "widescreen",
    "background": "light1",
    "footer": {
      "left": {
        "text": "Background fixture"
      },
      "right": {
        "slideNumber": true
      }
    }
  },
  "slides": [
    {
      "title": "Theme Slot Background",
      "design": {
        "background": {
          "type": "theme",
          "slot": "light2"
        }
      },
      "text": "Theme-slot backgrounds defer color choice to the active color scheme."
    },
    {
      "title": "Solid Background",
      "design": {
        "background": {
          "type": "solid",
          "color": "#ECFEFF",
          "opacity": 1
        }
      },
      "text": "Solid backgrounds use fixed hex colors."
    },
    {
      "title": "Gradient Background",
      "design": {
        "background": {
          "type": "gradient",
          "gradient": {
            "angle": 45,
            "stops": [
              {
                "color": "#1D4ED8",
                "position": 0
              },
              {
                "color": "#14B8A6",
                "position": 1
              }
            ]
          },
          "opacity": 0.9
        }
      },
      "text": "Gradient backgrounds carry angle and color stops."
    },
    {
      "title": "Image Background",
      "design": {
        "background": {
          "type": "image",
          "image": {
            "src": "asset:cover-image",
            "fit": "cover"
          },
          "opacity": 0.28
        }
      },
      "text": "Image backgrounds use a fixed image fill."
    },
    {
      "title": "Pattern Background",
      "design": {
        "background": {
          "type": "pattern",
          "pattern": {
            "preset": "diagStripe",
            "foregroundColor": "#CBD5E1",
            "backgroundColor": "#FFFFFF"
          },
          "opacity": 0.2
        }
      },
      "text": "Pattern backgrounds carry a preset plus foreground and background colors."
    }
  ],
  "assets": {
    "cover-image": {
      "src": "./assets/cover-image.jpg",
      "alt": "Abstract cover image",
      "mediaType": "image/jpeg"
    }
  }
}