Merge pull request 'fix(home): art-direct the hero's fallback path, and declare sharp' (#94) from fix/hero-fallback-and-sharp into main

Reviewed-on: #94

nextjs-app/components/HomeView.module.css

@@ -161,10 +161,22 @@
  * page and out-shouts the H1 and the search box. Dimming it in CSS is the
  * whole treatment, and the scrim then fades it into the dark panel instead of
  * into cream.
+ *
+ * Raising the brightness raises the background under light dark-theme text, so
+ * this value has a contrast floor, not just a taste range. Measured off
+ * rendered pixels, sampling background up to 120px past each line:
+ *
+ *   brightness   title      body
+ *   0.52         11.01:1    6.44:1
+ *   0.75          9.48:1    5.21:1   ← current
+ *
+ * Body text is the binding one. Going much above 0.75 walks it toward the
+ * 4.5:1 floor, and at that point the scrim needs to carry further right rather
+ * than the artwork being dimmed less.
  */
 @media (prefers-color-scheme: dark) {
   .heroArt img {
-    filter: brightness(0.52) saturate(0.72) contrast(1.02);
+    filter: brightness(0.75) saturate(0.72) contrast(1.02);
   }
   .heroPanel::before {
     background: linear-gradient(