fix: restore scrollbar styles broken by tailwind v4.3 upgrade

Tailwind v4.3 introduced built-in scrollbar utilities that conflicted
with the tailwind-scrollbar plugin, causing visual regressions.

Fixed by inlining the pre-v4.3 build output directly into main.css,
which also eliminates the need for the tailwind-scrollbar plugin.

assets/css/main.css

@@ -268,7 +268,44 @@ pre {
   }
 
   .bf-scrollbar {
-    @apply scrollbar-thin scrollbar-track-neutral-200 scrollbar-thumb-neutral-400 dark:scrollbar-track-neutral-800 dark:scrollbar-thumb-neutral-600;
+    &::-webkit-scrollbar-track {
+      background-color: var(--scrollbar-track);
+      border-radius: var(--scrollbar-track-radius);
+    }
+    &::-webkit-scrollbar-thumb {
+      background-color: var(--scrollbar-thumb);
+      border-radius: var(--scrollbar-thumb-radius);
+    }
+    &::-webkit-scrollbar-corner {
+      background-color: var(--scrollbar-corner);
+      border-radius: var(--scrollbar-corner-radius);
+    }
+    @supports (-moz-appearance:none) {
+      scrollbar-width: thin;
+      scrollbar-color: var(--scrollbar-thumb, initial) var(--scrollbar-track, initial);
+    }
+    &::-webkit-scrollbar {
+      display: block;
+      width: 8px;
+      height: 8px;
+    }
+    --scrollbar-thumb: oklch(70.8% 0 0);
+    --scrollbar-track: oklch(92.2% 0 0);
+    &:is(.dark *) {
+      --scrollbar-thumb: oklch(43.9% 0 0);
+    }
+    &:is(.dark *) {
+      --scrollbar-track: oklch(26.9% 0 0);
+    }
+  }
+}
+
+@layer base {
+  * {
+    @supports (-moz-appearance:none) {
+      scrollbar-color: initial;
+      scrollbar-width: initial;
+    }
   }
 }