setting up dark/white mode. fixed some other small things

components/BuilderNav.tsx

@@ -1,15 +1,34 @@
 "use client";
 
+/**
+ * BuilderNav.tsx
+ * -----------------------------------------------------------------------------
+ * Top navigation for the Builder experience.
+ *
+ * MAJOR LAYOUT IDEA:
+ * - Keep all primary nav items on the LEFT
+ * - Put *everything else* (search, viewing state, theme toggle later, user menu later)
+ *   into a RIGHT "actions cluster" using a single `ml-auto` wrapper.
+ *
+ * WHY:
+ * - Prevents multiple `ml-auto` elements fighting each other
+ * - Makes the right side easy to extend without breaking alignment
+ */
+
 import Link from "next/link";
 import { useSearchParams } from "next/navigation";
 import { CATEGORIES } from "@/data/gunbuilderParts";
 import type { Category } from "@/types/gunbuilder";
 
 type BuilderNavProps = {
+  // Optional override if a parent wants to force the active category
   activeCategoryId?: string | null;
 };
 
-// Helper to group categories for the dropdowns
+/**
+ * Helper: group categories for dropdowns.
+ * This assumes your Category has a `group` field like "lower" | "upper" | "accessories".
+ */
 function groupCategories(group: "lower" | "upper" | "accessories"): Category[] {
   return CATEGORIES.filter((c) => c.group === group);
 }
@@ -17,32 +36,43 @@ function groupCategories(group: "lower" | "upper" | "accessories"): Category[] {
 export function BuilderNav({ activeCategoryId }: BuilderNavProps) {
   const searchParams = useSearchParams();
 
+  // ---- Data / derived state --------------------------------------------------
   const lower = groupCategories("lower");
   const upper = groupCategories("upper");
   const accessories = groupCategories("accessories");
 
+  // Determine which category is "active" so we can highlight dropdown items
+  // and show the "Viewing" indicator on the right.
   const currentCategory =
     activeCategoryId ?? searchParams.get("category") ?? undefined;
 
+  // Base route for parts browsing (used for dropdown links + "Clear")
   const baseHref = "/parts";
 
+  /**
+   * Dropdown renderer (hover-based).
+   * - Uses Tailwind `group` + `group-hover` to show/hide the menu.
+   * - Highlights the active item.
+   */
   const renderDropdown = (label: string, items: Category[]) => {
     if (!items.length) return null;
 
     return (
       <div className="relative group">
+        {/* Dropdown trigger */}
         <button
           type="button"
-          className={`inline-flex items-center gap-1 font-medium tracking-wide transition-colors uppercase text-[11px] ${
-            items.some(cat => cat.id === currentCategory)
+          className={`inline-flex items-center gap-1 font-medium tracking-wide uppercase text-[11px] transition-colors ${
+            items.some((cat) => cat.id === currentCategory)
               ? "text-white"
-              : "text-neutral-200 hover:text-white"
+              : "text-neutral-300 hover:text-white"
           }`}
         >
           {label}
           <span className="text-[9px]">▾</span>
         </button>
 
+        {/* Dropdown menu */}
         <div className="invisible opacity-0 group-hover:visible group-hover:opacity-100 transition-all absolute left-0 mt-2 rounded-md border border-neutral-800 bg-black/95 shadow-xl z-40 min-w-[220px]">
           <ul className="py-2 text-sm">
             {items.map((cat) => {
@@ -51,12 +81,11 @@ export function BuilderNav({ activeCategoryId }: BuilderNavProps) {
                 <li key={cat.id}>
                   <Link
                     href={`${baseHref}/${cat.id}`}
-                    className={[
-                      "block w-full px-3 py-1.5 text-left text-sm transition-colors",
+                    className={`block w-full px-3 py-1.5 transition-colors ${
                       isActive
                         ? "bg-neutral-800 text-white"
-                        : "text-neutral-300 hover:bg-neutral-800 hover:text-white",
-                    ].join(" ")}
+                        : "text-neutral-300 hover:bg-neutral-800 hover:text-white"
+                    }`}
                   >
                     {cat.name}
                   </Link>
@@ -70,11 +99,23 @@ export function BuilderNav({ activeCategoryId }: BuilderNavProps) {
   };
 
   return (
-    <div className="max-w-6xl mx-auto w-full">   {/* ← aligns with topnav */}
+    /**
+     * Outer container matches TopNav width:
+     * - max-w-6xl mx-auto w-full ensures consistent alignment across app
+     */
+    <div className="max-w-6xl mx-auto w-full">
+      {/**
+       * FLEX STRATEGY:
+       * - Everything before the RIGHT cluster is "left side"
+       * - Then a single `ml-auto` cluster pushes everything else to the right
+       */}
       <nav className="flex items-center gap-6 border-b border-neutral-900 px-6 py-3 text-sm backdrop-blur-sm">
-        {/* Primary builder link */}
+        {/* ------------------------------------------------------------------ */}
+        {/* LEFT SIDE: primary nav */}
+        {/* ------------------------------------------------------------------ */}
+
         <Link
-          href={'/builder'}
+          href="/builder"
           className="font-semibold text-neutral-100 hover:text-white tracking-[0.25em] uppercase text-[11px]"
         >
           Builder
@@ -91,22 +132,57 @@ export function BuilderNav({ activeCategoryId }: BuilderNavProps) {
           Builds
         </Link>
 
-        {/* Right → Current filter */}
-        {currentCategory && (
-          <div className="ml-auto flex items-center gap-2 text-neutral-400 text-xs">
-            <span className="uppercase tracking-wide text-[10px]">Viewing</span>
-            <span className="font-medium text-neutral-100">
-              {CATEGORIES.find((c) => c.id === currentCategory)?.name ??
-                currentCategory}
-            </span>
-            <Link
-              href={baseHref}
-              className="rounded border border-neutral-700 px-2 py-0.5 text-[10px] uppercase tracking-wide hover:bg-neutral-800 hover:text-white"
+        {/* ------------------------------------------------------------------ */}
+        {/* RIGHT SIDE: actions + state */}
+        {/* IMPORTANT: this is the ONLY `ml-auto` in the nav to avoid conflicts */}
+        {/* ------------------------------------------------------------------ */}
+        <div className="ml-auto flex items-center gap-3">
+          {/* Search icon (placeholder action) */}
+          <button
+            type="button"
+            className="inline-flex h-8 w-8 items-center justify-center rounded-full border border-zinc-700 bg-zinc-900/60 text-zinc-400 hover:text-zinc-200 hover:bg-zinc-800 hover:border-zinc-500 transition-colors"
+            aria-label="Search (coming soon)"
+            title="Search (coming soon)"
+          >
+            <svg
+              xmlns="http://www.w3.org/2000/svg"
+              viewBox="0 0 24 24"
+              fill="none"
+              stroke="currentColor"
+              strokeWidth={2}
+              strokeLinecap="round"
+              strokeLinejoin="round"
+              className="h-4 w-4"
             >
-              Clear
-            </Link>
-          </div>
-        )}
+              <circle cx="11" cy="11" r="6" />
+              <line x1="16.5" y1="16.5" x2="21" y2="21" />
+            </svg>
+          </button>
+
+          {/* "Viewing" indicator (only shows when a category is active) */}
+          {currentCategory && (
+            <div className="flex items-center gap-2 text-neutral-400 text-xs">
+              <span className="uppercase tracking-wide text-[10px]">Viewing</span>
+
+              <span className="font-medium text-neutral-100">
+                {CATEGORIES.find((c) => c.id === currentCategory)?.name ??
+                  currentCategory}
+              </span>
+
+              {/* Clears category filter -> go back to /parts */}
+              <Link
+                href={baseHref}
+                className="rounded border border-neutral-700 px-2 py-0.5 text-[10px] uppercase tracking-wide hover:bg-neutral-800 hover:text-white"
+              >
+                Clear
+              </Link>
+            </div>
+          )}
+
+          {/* FUTURE: drop in ThemeToggle, UserMenu, Notifications here */}
+          {/* <ThemeToggle /> */}
+          {/* <UserMenu /> */}
+        </div>
       </nav>
     </div>
   );