{
  "$schema": "urn:prism:schema:v1:spec",
  "title": "Quarterly revenue by region — auto light/dark (dark_variant)",
  "data": {
    "values": [
      {"quarter": "Q1", "region": "East", "revenue": 62},
      {"quarter": "Q1", "region": "West", "revenue": 58},
      {"quarter": "Q2", "region": "East", "revenue": 71},
      {"quarter": "Q2", "region": "West", "revenue": 74},
      {"quarter": "Q3", "region": "East", "revenue": 66},
      {"quarter": "Q3", "region": "West", "revenue": 72},
      {"quarter": "Q4", "region": "East", "revenue": 88},
      {"quarter": "Q4", "region": "West", "revenue": 84}
    ]
  },
  "mark": "bar",
  "encoding": {
    "x": {"field": "quarter", "type": "nominal"},
    "y": {"field": "revenue", "type": "quantitative"},
    "color": {"field": "region", "type": "nominal"}
  },
  "theme": {"dark_variant": "dark"}
}