Drop caramel-light variant; darken caramel to #d38d5f

Nav active/hover state now uses --color-caramel directly — one fewer
tonal shade to maintain. Also pins caramel to a concrete hex (#d38d5f)
since the previous oklch value read too bright.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: nedtwigg

website/src/components/SiteHeader.tsx

@@ -104,8 +104,8 @@ const SiteHeader = forwardRef<HTMLElement, SiteHeaderProps>(
                           ? "opacity-100"
                           : "opacity-70 hover:opacity-100"
                         : isActive
-                          ? "text-[var(--color-caramel-light)]"
-                          : "hover:text-[var(--color-caramel-light)]"
+                          ? "text-[var(--color-caramel)]"
+                          : "hover:text-[var(--color-caramel)]"
                     }`}
                     style={
                       themeAware && isActive

website/src/index.css

@@ -6,8 +6,7 @@
   --color-bg: oklch(10% 0.01 60);
   --color-surface: oklch(18% 0.015 60);
   --color-text: oklch(92% 0.01 60);
-  --color-caramel: oklch(65% 0.14 60);
-  --color-caramel-light: oklch(75% 0.12 60);
+  --color-caramel: #d38d5f;
 }
 
 html {