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node_modules/astro/dist/assets/fonts/implementations/system-fallbacks-provider.js

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+const SYSTEM_METRICS = {
+  "Times New Roman": {
+    ascent: 1825,
+    descent: -443,
+    lineGap: 87,
+    unitsPerEm: 2048,
+    xWidthAvg: 832
+  },
+  Arial: {
+    ascent: 1854,
+    descent: -434,
+    lineGap: 67,
+    unitsPerEm: 2048,
+    xWidthAvg: 913
+  },
+  "Courier New": {
+    ascent: 1705,
+    descent: -615,
+    lineGap: 0,
+    unitsPerEm: 2048,
+    xWidthAvg: 1229
+  },
+  BlinkMacSystemFont: {
+    ascent: 1980,
+    descent: -432,
+    lineGap: 0,
+    unitsPerEm: 2048,
+    xWidthAvg: 853
+  },
+  "Segoe UI": {
+    ascent: 2210,
+    descent: -514,
+    lineGap: 0,
+    unitsPerEm: 2048,
+    xWidthAvg: 908
+  },
+  Roboto: {
+    ascent: 1900,
+    descent: -500,
+    lineGap: 0,
+    unitsPerEm: 2048,
+    xWidthAvg: 911
+  },
+  "Helvetica Neue": {
+    ascent: 952,
+    descent: -213,
+    lineGap: 28,
+    unitsPerEm: 1e3,
+    xWidthAvg: 450
+  }
+};
+const DEFAULT_FALLBACKS = {
+  serif: ["Times New Roman"],
+  "sans-serif": ["Arial"],
+  monospace: ["Courier New"],
+  "system-ui": ["BlinkMacSystemFont", "Segoe UI", "Roboto", "Helvetica Neue", "Arial"],
+  "ui-serif": ["Times New Roman"],
+  "ui-sans-serif": ["Arial"],
+  "ui-monospace": ["Courier New"]
+};
+function createSystemFallbacksProvider() {
+  return {
+    getLocalFonts(fallback) {
+      return DEFAULT_FALLBACKS[fallback] ?? null;
+    },
+    getMetricsForLocalFont(family) {
+      return SYSTEM_METRICS[family];
+    }
+  };
+}
+export {
+  DEFAULT_FALLBACKS,
+  createSystemFallbacksProvider
+};