{
  "title": {
    "text": "Gas grew slowly. Coal shrank. Solar sprinted.",
    "left": "center",
    "top": 8,
    "textStyle": { "fontSize": 16, "fontWeight": 600, "color": "#17212b" }
  },
  "grid": { "left": 56, "right": 24, "top": 88, "bottom": 56 },
  "legend": {
    "top": 40,
    "data": ["Coal", "Natural gas", "Nuclear", "Solar", "Wind"],
    "textStyle": { "color": "#17212b" }
  },
  "xAxis": {
    "type": "category",
    "data": ["2015", "2016", "2017", "2018", "2019", "2020", "2021", "2022", "2023", "2024", "2025"],
    "axisLabel": { "color": "#374151" },
    "axisLine": { "lineStyle": { "color": "#6b7280" } }
  },
  "yAxis": {
    "type": "value",
    "name": "GW on-grid",
    "nameLocation": "middle",
    "nameGap": 40,
    "min": 0,
    "max": 550,
    "axisLabel": { "color": "#374151" },
    "splitLine": { "lineStyle": { "color": "#e5e7eb" } }
  },
  "series": [
    {
      "name": "Coal",
      "type": "line",
      "symbol": "circle",
      "symbolSize": 7,
      "lineStyle": { "width": 2.5, "type": "solid", "color": "#7c2d12" },
      "itemStyle": { "color": "#7c2d12" },
      "data": [281.5, 269.1, 258.9, 245.0, 230.9, 217.5, 211.4, 191.5, 180.2, 175.7, 171.3]
    },
    {
      "name": "Natural gas",
      "type": "line",
      "symbol": "diamond",
      "symbolSize": 8,
      "lineStyle": { "width": 2.5, "type": "solid", "color": "#075ea8" },
      "itemStyle": { "color": "#075ea8" },
      "data": [439.4, 447.2, 456.4, 472.3, 479.4, 488.3, 494.4, 503.9, 509.6, 508.2, 513.9]
    },
    {
      "name": "Nuclear",
      "type": "line",
      "symbol": "rect",
      "symbolSize": 6,
      "lineStyle": { "width": 2.5, "type": "dashed", "color": "#6d28d9" },
      "itemStyle": { "color": "#6d28d9" },
      "data": [98.7, 99.6, 99.6, 99.4, 98.1, 96.5, 95.5, 94.7, 95.7, 96.8, 96.9]
    },
    {
      "name": "Solar",
      "type": "line",
      "symbol": "triangle",
      "symbolSize": 8,
      "lineStyle": { "width": 2.5, "type": "solid", "color": "#0f6b4c" },
      "itemStyle": { "color": "#0f6b4c" },
      "data": [23.4, 34.7, 43.1, 51.6, 60.8, 75.8, 94.8, 112.8, 139.9, 177.6, 211.6]
    },
    {
      "name": "Wind",
      "type": "line",
      "symbol": "emptyCircle",
      "symbolSize": 7,
      "lineStyle": { "width": 2.5, "type": "dotted", "color": "#0e7490" },
      "itemStyle": { "color": "#0e7490" },
      "data": [72.6, 81.3, 87.6, 94.5, 103.7, 118.5, 132.9, 141.5, 147.5, 152.7, 158.8]
    }
  ]
}