First commit

frontend/app/assets/css/_fonts.scss

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+// ---------- Fonts: Computer Modern (CMU) ----------
+// CMU ships only two weights, so we map the design's intermediate
+// weights onto real faces: <=550 → regular, >550 → bold extended.
+$cmu-faces: (
+  ('cmunrm', 100 550, normal),
+  ('cmunti', 100 550, italic),
+  ('cmunbx', 551 900, normal),
+  ('cmunbi', 551 900, italic),
+);
+
+@each $file, $weight, $style in $cmu-faces {
+  @font-face {
+    font-family: 'Computer Modern';
+    src: url('/fonts/#{$file}.ttf') format('truetype');
+    font-weight: $weight;
+    font-style: $style;
+    font-display: swap;
+  }
+}