fix: missing CSS classes

src/base.css

@@ -63,6 +63,23 @@
         hover:decoration-[var(--link-hover)] active:decoration-[var(--link-active)] underline-offset-[0.25rem]
     }
 
+    .toc-hide,
+    .toc-not-ready {
+        @apply opacity-0 pointer-events-none
+    }
+
+    #toc-inner-wrapper {
+        mask-image: linear-gradient(to bottom, transparent 0%, black 2rem, black calc(100% - 2rem), transparent 100%);
+    }
+
+    .hide-scrollbar {
+        scrollbar-width: none;
+        -ms-overflow-style: none;
+    }
+    .hide-scrollbar::-webkit-scrollbar {
+        display: none;
+    }
+
     .text-90 {
         @apply text-black/90 dark:text-white/90
     }