refactor: externalize tool definitions and polish app shell

- Create lib/tools.tsx as single source of truth for all tool metadata
  (title, shortTitle, navTitle, description, summary, icon, etc.)
- Update AppSidebar to render nav from centralized tools list with
  descriptions, remove collapse footer button
- Update AppHeader with sidebar collapse toggle, tool short title,
  and app logo; remove breadcrumbs
- Update AppPage to auto-resolve tool icon from pathname
- Update ToolsGrid/ToolCard to use shared tools data, remove per-card
  gradients for uniform styling
- Add per-tool HTML title via metadata exports (title template in root
  layout)
- Style landing page and 404 headings with primary theme color
- Add Toolbox icon to hero CTA, GitFork icon link in footer
- Remove footer from error page and "View on Dev" buttons
- Extract ColorPage client component for RSC metadata compatibility

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/(app)/ascii/page.tsx

@@ -1,11 +1,17 @@
+import type { Metadata } from 'next';
 import { ASCIIConverter } from '@/components/ascii/ASCIIConverter';
 import { AppPage } from '@/components/layout/AppPage';
+import { getToolByHref } from '@/lib/tools';
+
+const tool = getToolByHref('/ascii')!;
+
+export const metadata: Metadata = { title: tool.title };
 
 export default function ASCIIPage() {
   return (
     <AppPage
-      title="ASCII Art Generator"
+      title={tool.title}
-      description="ASCII Art Text Generator with 373 Fonts"
+      description={tool.description}
     >
       <ASCIIConverter />
     </AppPage>

app/(app)/color/globals.css

@@ -1,181 +0,0 @@
-@import "tailwindcss";
-@plugin "@tailwindcss/typography";
-
-@source "../components/color/*.{js,ts,jsx,tsx}";
-@source "../components/layout/*.{js,ts,jsx,tsx}";
-@source "../components/providers/*.{js,ts,jsx,tsx}";
-@source "../components/ui/*.{js,ts,jsx,tsx}";
-@source "*.{js,ts,jsx,tsx}";
-
-@custom-variant dark (&:is(.dark *));
-
-:root {
-  --radius: 0.5rem;
-
-  /* Light Mode Colors - Using OKLCH for better color precision */
-  --background: oklch(100% 0 0);
-  --foreground: oklch(9.8% 0.038 285.8);
-  --card: oklch(100% 0 0);
-  --card-foreground: oklch(9.8% 0.038 285.8);
-  --popover: oklch(100% 0 0);
-  --popover-foreground: oklch(9.8% 0.038 285.8);
-  --primary: oklch(22.4% 0.053 285.8);
-  --primary-foreground: oklch(98% 0.016 240);
-  --secondary: oklch(96.1% 0.016 240);
-  --secondary-foreground: oklch(22.4% 0.053 285.8);
-  --muted: oklch(96.1% 0.016 240);
-  --muted-foreground: oklch(46.9% 0.025 244.1);
-  --accent: oklch(96.1% 0.016 240);
-  --accent-foreground: oklch(22.4% 0.053 285.8);
-  --destructive: oklch(60.2% 0.168 29.2);
-  --destructive-foreground: oklch(98% 0.016 240);
-  --border: oklch(91.4% 0.026 243.1);
-  --input: oklch(91.4% 0.026 243.1);
-  --ring: oklch(9.8% 0.038 285.8);
-}
-
-@theme inline {
-  /* Tailwind v4 theme color definitions */
-  --color-background: var(--background);
-  --color-foreground: var(--foreground);
-  --color-card: var(--card);
-  --color-card-foreground: var(--card-foreground);
-  --color-popover: var(--popover);
-  --color-popover-foreground: var(--popover-foreground);
-  --color-primary: var(--primary);
-  --color-primary-foreground: var(--primary-foreground);
-  --color-secondary: var(--secondary);
-  --color-secondary-foreground: var(--secondary-foreground);
-  --color-muted: var(--muted);
-  --color-muted-foreground: var(--muted-foreground);
-  --color-accent: var(--accent);
-  --color-accent-foreground: var(--accent-foreground);
-  --color-destructive: var(--destructive);
-  --color-destructive-foreground: var(--destructive-foreground);
-  --color-border: var(--border);
-  --color-input: var(--input);
-  --color-ring: var(--ring);
-
-  /* Custom Animations */
-  --animate-fade-in: fadeIn 0.3s ease-in-out;
-  --animate-slide-up: slideUp 0.4s ease-out;
-  --animate-slide-down: slideDown 0.4s ease-out;
-  --animate-slide-in-right: slideInRight 0.3s ease-out;
-  --animate-slide-in-left: slideInLeft 0.3s ease-out;
-  --animate-scale-in: scaleIn 0.2s ease-out;
-  --animate-bounce-gentle: bounceGentle 0.5s ease-in-out;
-  --animate-shimmer: shimmer 2s infinite;
-}
-
-.dark {
-  --background: oklch(9.8% 0.038 285.8);
-  --foreground: oklch(98% 0.016 240);
-  --card: oklch(9.8% 0.038 285.8);
-  --card-foreground: oklch(98% 0.016 240);
-  --popover: oklch(9.8% 0.038 285.8);
-  --popover-foreground: oklch(98% 0.016 240);
-  --primary: oklch(98% 0.016 240);
-  --primary-foreground: oklch(22.4% 0.053 285.8);
-  --secondary: oklch(17.5% 0.036 242.3);
-  --secondary-foreground: oklch(98% 0.016 240);
-  --muted: oklch(17.5% 0.036 242.3);
-  --muted-foreground: oklch(65.1% 0.031 244);
-  --accent: oklch(17.5% 0.036 242.3);
-  --accent-foreground: oklch(98% 0.016 240);
-  --destructive: oklch(30.6% 0.125 29.2);
-  --destructive-foreground: oklch(98% 0.016 240);
-  --border: oklch(17.5% 0.036 242.3);
-  --input: oklch(17.5% 0.036 242.3);
-  --ring: oklch(83.9% 0.031 243.7);
-}
-
-@layer base {
-  * {
-    @apply border-border outline-ring/50;
-    transition-property: background-color, border-color, color, fill, stroke;
-    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
-    transition-duration: 200ms;
-  }
-
-  body {
-    @apply bg-background text-foreground;
-    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
-  }
-
-  html {
-    scroll-behavior: smooth;
-  }
-
-  /* Disable transitions during theme switch to prevent flash */
-  .theme-transitioning * {
-    transition: none !important;
-  }
-
-  /* Custom scrollbar */
-  ::-webkit-scrollbar {
-    width: 10px;
-    height: 10px;
-  }
-
-  ::-webkit-scrollbar-track {
-    @apply bg-background;
-  }
-
-  ::-webkit-scrollbar-thumb {
-    @apply bg-muted-foreground/20 rounded-lg hover:bg-muted-foreground/30;
-  }
-
-  /* Screen reader only */
-  .sr-only {
-    position: absolute;
-    width: 1px;
-    height: 1px;
-    padding: 0;
-    margin: -1px;
-    overflow: hidden;
-    clip: rect(0, 0, 0, 0);
-    white-space: nowrap;
-    border-width: 0;
-  }
-}
-
-/* Animation Keyframes */
-@keyframes fadeIn {
-  from { opacity: 0; }
-  to { opacity: 1; }
-}
-
-@keyframes slideUp {
-  from { transform: translateY(20px); opacity: 0; }
-  to { transform: translateY(0); opacity: 1; }
-}
-
-@keyframes slideDown {
-  from { transform: translateY(-20px); opacity: 0; }
-  to { transform: translateY(0); opacity: 1; }
-}
-
-@keyframes slideInRight {
-  from { transform: translateX(-20px); opacity: 0; }
-  to { transform: translateX(0); opacity: 1; }
-}
-
-@keyframes slideInLeft {
-  from { transform: translateX(20px); opacity: 0; }
-  to { transform: translateX(0); opacity: 1; }
-}
-
-@keyframes scaleIn {
-  from { transform: scale(0.95); opacity: 0; }
-  to { transform: scale(1); opacity: 1; }
-}
-
-@keyframes bounceGentle {
-  0%, 100% { transform: translateY(0); }
-  50% { transform: translateY(-5px); }
-}
-
-@keyframes shimmer {
-  from { background-position: -1000px 0; }
-  to { background-position: 1000px 0; }
-}

app/(app)/color/layout.tsx

@@ -1,11 +0,0 @@
-export default function ColorLayout({
-  children,
-}: Readonly<{
-  children: React.ReactNode;
-}>) {
-  return (
-    <>
-      {children}
-    </>
-  );
-}

app/(app)/color/page.tsx

@@ -1,388 +1,11 @@
-'use client';
+import type { Metadata } from 'next';
+import { getToolByHref } from '@/lib/tools';
+import { ColorPage } from '@/components/color/ColorPage';
 
-import { useState, useEffect, Suspense } from 'react';
+const tool = getToolByHref('/color')!;
-import { useSearchParams, useRouter } from 'next/navigation';
-import { ColorPicker } from '@/components/color/ColorPicker';
-import { ColorInfo } from '@/components/color/ColorInfo';
-import { ManipulationPanel } from '@/components/color/ManipulationPanel';
-import { PaletteGrid } from '@/components/color/PaletteGrid';
-import { ExportMenu } from '@/components/color/ExportMenu';
-import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
-import { AppPage } from '@/components/layout/AppPage';
-import { useColorInfo, useGeneratePalette, useGenerateGradient } from '@/lib/color/api/queries';
-import { Loader2, Share2, Palette, Plus, X, Layers } from 'lucide-react';
-import { Button } from '@/components/ui/button';
-import { Input } from '@/components/ui/input';
-import { Label } from '@/components/ui/label';
-import {
-  Select,
-  SelectContent,
-  SelectItem,
-  SelectTrigger,
-  SelectValue,
-} from '@/components/ui/select';
-import { toast } from 'sonner';
 
-type HarmonyType =
+export const metadata: Metadata = { title: tool.title };
-  | 'monochromatic'
-  | 'analogous'
-  | 'complementary'
-  | 'triadic'
-  | 'tetradic';
 
-function PlaygroundContent() {
+export default function Page() {
-  const searchParams = useSearchParams();
+  return <ColorPage />;
-  const router = useRouter();
-  const [color, setColor] = useState(() => {
-    // Initialize from URL if available
-    const urlColor = searchParams.get('color');
-    return urlColor ? `#${urlColor.replace('#', '')}` : '#ff0099';
-  });
-
-  // Harmony state
-  const [harmonyType, setHarmonyType] = useState<HarmonyType>('complementary');
-  const [palette, setPalette] = useState<string[]>([]);
-  const paletteMutation = useGeneratePalette();
-
-  // Gradient state
-  const [stops, setStops] = useState<string[]>(['#ff0099', '#0099ff']);
-  const [gradientCount, setGradientCount] = useState(10);
-  const [gradientResult, setGradientResult] = useState<string[]>([]);
-  const gradientMutation = useGenerateGradient();
-
-  const { data, isLoading, isError, error } = useColorInfo({
-    colors: [color],
-  });
-
-  const colorInfo = data?.colors[0];
-
-  // Update URL when color changes
-  useEffect(() => {
-    const hex = color.replace('#', '');
-    if (hex.length === 6 || hex.length === 3) {
-      router.push(`/color?color=${hex}`, { scroll: false });
-    }
-  }, [color, router]);
-
-  // Sync first gradient stop with active color
-  useEffect(() => {
-    const newStops = [...stops];
-    newStops[0] = color;
-    setStops(newStops);
-  }, [color]);
-
-  // Share color via URL
-  const handleShare = () => {
-    const url = `${window.location.origin}/color?color=${color.replace('#', '')}`;
-    navigator.clipboard.writeText(url);
-    toast.success('Link copied to clipboard!');
-  };
-
-  const generateHarmony = async () => {
-    try {
-      const result = await paletteMutation.mutateAsync({
-        base: color,
-        scheme: harmonyType,
-      });
-
-      const colors = [result.palette.primary, ...result.palette.secondary];
-      setPalette(colors);
-      toast.success(`Generated ${harmonyType} harmony palette`);
-    } catch (error) {
-      toast.error('Failed to generate harmony palette');
-      console.error(error);
-    }
-  };
-
-  const generateGradient = async () => {
-    try {
-      const result = await gradientMutation.mutateAsync({
-        stops,
-        count: gradientCount,
-      });
-      setGradientResult(result.gradient);
-      toast.success(`Generated ${result.gradient.length} colors`);
-    } catch (error) {
-      toast.error('Failed to generate gradient');
-    }
-  };
-
-  const addStop = () => {
-    setStops([...stops, '#000000']);
-  };
-
-  const removeStop = (index: number) => {
-    if (index === 0) return; // Prevent deleting the first stop (synchronized with picker)
-    if (stops.length > 2) {
-      setStops(stops.filter((_, i) => i !== index));
-    }
-  };
-
-  const updateStop = (index: number, colorValue: string) => {
-    const newStops = [...stops];
-    newStops[index] = colorValue;
-    setStops(newStops);
-    if (index === 0) setColor(colorValue);
-  };
-
-  const harmonyDescriptions: Record<HarmonyType, string> = {
-    monochromatic: 'Single color with variations',
-    analogous: 'Colors adjacent on the color wheel (±30°)',
-    complementary: 'Colors opposite on the color wheel (180°)',
-    triadic: 'Three colors evenly spaced on the color wheel (120°)',
-    tetradic: 'Four colors evenly spaced on the color wheel (90°)',
-  };
-
-  return (
-    <AppPage
-      title="Color"
-      description="Interactive color manipulation and analysis tool"
-    >
-      <div className="space-y-6">
-        {/* Row 1: Workspace */}
-        <div className="grid grid-cols-1 lg:grid-cols-3 gap-6 items-stretch">
-          {/* Main Workspace: Color Picker and Information */}
-          <div className="lg:col-span-2">
-            <Card className="h-full">
-              <CardHeader className="flex flex-row items-center justify-between space-y-0">
-                <CardTitle>Color Picker</CardTitle>
-                <Button onClick={handleShare} variant="outline" size="xs">
-                  <Share2 className="h-3 w-3 mr-1" />
-                  Share
-                </Button>
-              </CardHeader>
-              <CardContent>
-                <div className="flex flex-col md:flex-row gap-8">
-                  <div className="flex-shrink-0 mx-auto md:mx-0">
-                    <ColorPicker color={color} onChange={setColor} />
-                  </div>
-
-                  <div className="flex-1 min-w-0">
-                    {isLoading && (
-                      <div className="flex items-center justify-center py-12">
-                        <Loader2 className="h-6 w-6 animate-spin text-muted-foreground" />
-                      </div>
-                    )}
-
-                    {isError && (
-                      <div className="p-3 bg-destructive/10 text-destructive rounded-lg text-sm">
-                        <p className="font-medium">Error loading color information</p>
-                        <p className="mt-1">{error?.message || 'Unknown error'}</p>
-                      </div>
-                    )}
-
-                    {colorInfo && <ColorInfo info={colorInfo} />}
-                  </div>
-                </div>
-              </CardContent>
-            </Card>
-          </div>
-
-          {/* Sidebar: Color Manipulation */}
-          <div className="lg:col-span-1">
-            <Card className="h-full">
-              <CardHeader>
-                <CardTitle>Adjustments</CardTitle>
-              </CardHeader>
-              <CardContent>
-                <ManipulationPanel color={color} onColorChange={setColor} />
-              </CardContent>
-            </Card>
-          </div>
-        </div>
-
-        {/* Row 2: Harmony Generator */}
-        <div className="grid grid-cols-1 lg:grid-cols-3 gap-6 items-stretch">
-          {/* Harmony Controls */}
-          <div className="lg:col-span-1">
-            <Card className="h-full">
-              <CardHeader>
-                <CardTitle>Harmony</CardTitle>
-              </CardHeader>
-              <CardContent className="space-y-4">
-                <Select
-                  value={harmonyType}
-                  onValueChange={(value) => setHarmonyType(value as HarmonyType)}
-                >
-                  <SelectTrigger className="w-full">
-                    <SelectValue placeholder="Select harmony" />
-                  </SelectTrigger>
-                  <SelectContent>
-                    <SelectItem value="monochromatic">Monochromatic</SelectItem>
-                    <SelectItem value="analogous">Analogous</SelectItem>
-                    <SelectItem value="complementary">Complementary</SelectItem>
-                    <SelectItem value="triadic">Triadic</SelectItem>
-                    <SelectItem value="tetradic">Tetradic (Square)</SelectItem>
-                  </SelectContent>
-                </Select>
-
-                <p className="text-xs text-muted-foreground">
-                  {harmonyDescriptions[harmonyType]}
-                </p>
-
-                <Button
-                  onClick={generateHarmony}
-                  disabled={paletteMutation.isPending}
-                  className="w-full"
-                >
-                  {paletteMutation.isPending ? (
-                    <>
-                      <Loader2 className="h-3.5 w-3.5 mr-1.5 animate-spin" />
-                      Generating...
-                    </>
-                  ) : (
-                    'Generate'
-                  )}
-                </Button>
-              </CardContent>
-            </Card>
-          </div>
-
-          {/* Harmony Results */}
-          <div className="lg:col-span-2">
-            <Card className="h-full">
-              <CardHeader>
-                <CardTitle>
-                  Palette {palette.length > 0 && <span className="text-muted-foreground font-normal text-sm ml-1">({palette.length})</span>}
-                </CardTitle>
-              </CardHeader>
-              <CardContent>
-                {palette.length > 0 ? (
-                  <div className="space-y-5">
-                    <PaletteGrid colors={palette} onColorClick={setColor} />
-                    <div className="pt-3 border-t">
-                      <ExportMenu colors={palette} />
-                    </div>
-                  </div>
-                ) : (
-                  <div className="py-8 text-center text-muted-foreground text-xs">
-                    <Palette className="h-8 w-8 mx-auto mb-2 opacity-20" />
-                    <p>Generate a harmony palette from the current color</p>
-                  </div>
-                )}
-              </CardContent>
-            </Card>
-          </div>
-        </div>
-
-        {/* Row 3: Gradient Generator */}
-        <div className="grid grid-cols-1 lg:grid-cols-3 gap-6 items-stretch">
-          {/* Gradient Controls */}
-          <div className="lg:col-span-1">
-            <Card className="h-full">
-              <CardHeader>
-                <CardTitle>Gradient</CardTitle>
-              </CardHeader>
-              <CardContent className="space-y-4">
-                <div className="space-y-2">
-                  <Label className="text-xs">Color Stops</Label>
-                  {stops.map((stop, index) => (
-                    <div key={index} className="flex items-center gap-2">
-                      <Input
-                        type="color"
-                        value={stop}
-                        onChange={(e) => updateStop(index, e.target.value)}
-                        className="w-9 h-9 p-1 shrink-0 cursor-pointer"
-                      />
-                      <Input
-                        type="text"
-                        value={stop}
-                        onChange={(e) => updateStop(index, e.target.value)}
-                        className="font-mono text-xs flex-1"
-                      />
-                      {index !== 0 && stops.length > 2 && (
-                        <Button
-                          variant="ghost"
-                          size="icon-xs"
-                          onClick={() => removeStop(index)}
-                        >
-                          <X className="h-3.5 w-3.5" />
-                        </Button>
-                      )}
-                    </div>
-                  ))}
-                  <Button onClick={addStop} variant="outline" className="w-full">
-                    <Plus className="h-3.5 w-3.5 mr-1.5" />
-                    Add Stop
-                  </Button>
-                </div>
-
-                <div className="space-y-2">
-                  <Label className="text-xs">Steps</Label>
-                  <Input
-                    type="number"
-                    min={2}
-                    max={100}
-                    value={gradientCount}
-                    onChange={(e) => setGradientCount(parseInt(e.target.value))}
-                  />
-                </div>
-
-                <Button
-                  onClick={generateGradient}
-                  disabled={gradientMutation.isPending}
-                  className="w-full"
-                >
-                  {gradientMutation.isPending ? (
-                    <>
-                      <Loader2 className="h-3.5 w-3.5 mr-1.5 animate-spin" />
-                      Generating...
-                    </>
-                  ) : (
-                    'Generate'
-                  )}
-                </Button>
-              </CardContent>
-            </Card>
-          </div>
-
-          {/* Gradient Results */}
-          <div className="lg:col-span-2">
-            <Card className="h-full">
-              <CardHeader>
-                <CardTitle>
-                  Gradient {gradientResult.length > 0 && <span className="text-muted-foreground font-normal text-sm ml-1">({gradientResult.length})</span>}
-                </CardTitle>
-              </CardHeader>
-              <CardContent>
-                {gradientResult.length > 0 ? (
-                  <div className="space-y-5">
-                    <div
-                      className="h-16 w-full rounded-lg border"
-                      style={{
-                        background: `linear-gradient(to right, ${gradientResult.join(', ')})`,
-                      }}
-                    />
-                    <PaletteGrid colors={gradientResult} onColorClick={setColor} />
-                    <div className="pt-3 border-t">
-                      <ExportMenu colors={gradientResult} />
-                    </div>
-                  </div>
-                ) : (
-                  <div className="py-8 text-center text-muted-foreground text-xs">
-                    <Layers className="h-8 w-8 mx-auto mb-2 opacity-20" />
-                    <p>Add color stops and generate a smooth gradient</p>
-                  </div>
-                )}
-              </CardContent>
-            </Card>
-          </div>
-        </div>
-      </div>
-    </AppPage>
-  );
-}
-
-export default function PlaygroundPage() {
-  return (
-    <Suspense fallback={
-      <div className="min-h-screen py-12">
-        <div className="max-w-7xl mx-auto px-8 flex items-center justify-center">
-          <Loader2 className="h-8 w-8 animate-spin text-muted-foreground" />
-        </div>
-      </div>
-    }>
-      <PlaygroundContent />
-    </Suspense>
-  );
 }

app/(app)/favicon/page.tsx

@@ -1,14 +1,17 @@
-'use client';
+import type { Metadata } from 'next';
-
-import * as React from 'react';
 import { AppPage } from '@/components/layout/AppPage';
 import { FaviconGenerator } from '@/components/favicon/FaviconGenerator';
+import { getToolByHref } from '@/lib/tools';
+
+const tool = getToolByHref('/favicon')!;
+
+export const metadata: Metadata = { title: tool.title };
 
 export default function FaviconPage() {
   return (
     <AppPage
-      title="Favicon Generator"
+      title={tool.title}
-      description="Create a complete set of icons for your website including PWA manifest and HTML code."
+      description={tool.description}
     >
       <FaviconGenerator />
     </AppPage>

app/(app)/media/page.tsx

@@ -1,11 +1,17 @@
+import type { Metadata } from 'next';
 import { FileConverter } from '@/components/media/FileConverter';
 import { AppPage } from '@/components/layout/AppPage';
+import { getToolByHref } from '@/lib/tools';
+
+const tool = getToolByHref('/media')!;
+
+export const metadata: Metadata = { title: tool.title };
 
 export default function MediaPage() {
   return (
     <AppPage
-      title="Media Converter"
+      title={tool.title}
-      description="Professional browser-based media conversion for video, audio, and images"
+      description={tool.description}
     >
       <FileConverter />
     </AppPage>

app/(app)/units/page.tsx

@@ -1,11 +1,17 @@
+import type { Metadata } from 'next';
 import MainConverter from '@/components/units/MainConverter';
 import { AppPage } from '@/components/layout/AppPage';
+import { getToolByHref } from '@/lib/tools';
+
+const tool = getToolByHref('/units')!;
+
+export const metadata: Metadata = { title: tool.title };
 
 export default function UnitsPage() {
   return (
     <AppPage
-      title="Units Converter" 
+      title={tool.title}
-      description="Smart unit converter with 187 units across 23 categories"
+      description={tool.description}
     >
       <MainConverter />
     </AppPage>

app/layout.tsx

@@ -4,7 +4,10 @@ import './globals.css';
 const siteUrl = process.env.NEXT_PUBLIC_SITE_URL || 'http://localhost:3000';
 
 export const metadata: Metadata = {
-  title: 'Kit - Your Creative Toolkit',
+  title: {
+    default: 'Kit - Your Creative Toolkit',
+    template: '%s | Kit',
+  },
   description: 'A curated collection of creative and utility tools for developers and creators. Features file conversion, image editing, and color manipulation.',
   keywords: ['tools', 'utilities', 'file converter', 'image editor', 'color palette', 'creative toolkit', 'convert', 'paint', 'color', 'open source'],
   metadataBase: new URL(siteUrl),

app/not-found.tsx

@@ -3,7 +3,6 @@
 import Link from 'next/link';
 import { motion } from 'framer-motion';
 import AnimatedBackground from '@/components/AnimatedBackground';
-import Footer from '@/components/Footer';
 import Logo from '@/components/Logo';
 import { Button } from '@/components/ui/button';
 import { Home } from 'lucide-react';
@@ -28,7 +27,7 @@ export default function NotFound() {
 
           {/* 404 heading */}
           <motion.h1
-            className="text-7xl md:text-9xl font-bold mb-6 bg-clip-text text-transparent bg-gradient-to-r from-purple-400 via-pink-400 to-cyan-400"
+            className="text-7xl md:text-9xl font-bold mb-6 text-primary"
             initial={{ opacity: 0, y: 20 }}
             animate={{ opacity: 1, y: 0 }}
             transition={{ duration: 0.8, delay: 0.2 }}
@@ -71,8 +70,6 @@ export default function NotFound() {
           </motion.div>
         </div>
       </div>
-
-      <Footer />
     </main>
   );
 }

components/Footer.tsx

@@ -1,6 +1,7 @@
 'use client';
 
 import { motion } from 'framer-motion';
+import { GitFork } from 'lucide-react';
 
 export default function Footer() {
   const currentYear = new Date().getFullYear();
@@ -15,36 +16,20 @@ export default function Footer() {
           viewport={{ once: true }}
           transition={{ duration: 0.6 }}
         >
-          {/* Brand Section */}
+          {/* Copyright */}
-          <div className="inline-flex items-center gap-2 px-4 py-2 rounded-full border border-primary/50 bg-primary/5">
+          <p className="text-sm text-muted-foreground">
-            <span className="text-base font-bold bg-clip-text text-transparent bg-gradient-to-r from-purple-400 to-cyan-400">Kit</span>
+            © {currentYear} Kit. Built with Next.js 16 & Tailwind CSS 4
-            <span className="text-base text-muted-foreground/30">•</span>
+          </p>
-            <span className="text-base text-primary font-medium">Open Source</span>
-          </div>
 
-          {/* Copyright - centered */}
+          {/* Source link */}
-          <div className="text-center">
-            <p className="text-sm text-muted-foreground">
-              © {currentYear} Kit. Built with Next.js 16 & Tailwind CSS 4
-            </p>
-          </div>
-
-          {/* Dev Link */}
           <a
             href="https://dev.pivoine.art/valknar/kit-ui"
             target="_blank"
             rel="noopener noreferrer"
-            className="group flex items-center gap-3 px-4 py-2 rounded-full border border-border hover:border-primary transition-all duration-300 bg-card/50"
+            title="View source"
+            className="text-muted-foreground hover:text-primary transition-colors duration-300"
           >
-            <svg className="w-5 h-5 text-muted-foreground group-hover:text-primary transition-colors" fill="none" stroke="currentColor" viewBox="0 0 24 24" strokeWidth={2}>
+            <GitFork className="h-5 w-5" />
-              <line x1="6" y1="3" x2="6" y2="15" strokeLinecap="round" />
-              <circle cx="18" cy="6" r="3" />
-              <circle cx="6" cy="18" r="3" />
-              <path d="M18 9a9 9 0 01-9 9" strokeLinecap="round" />
-            </svg>
-            <span className="text-sm text-muted-foreground group-hover:text-primary transition-colors font-medium">
-              View on Dev
-            </span>
           </a>
         </motion.div>
       </div>

components/Hero.tsx

@@ -1,6 +1,7 @@
 'use client';
 
 import { motion } from 'framer-motion';
+import { Toolbox } from 'lucide-react';
 import Logo from './Logo';
 
 export default function Hero() {
@@ -29,7 +30,7 @@ export default function Hero() {
 
         {/* Main heading */}
         <motion.h1
-          className="text-6xl md:text-8xl font-bold mb-6 bg-clip-text text-transparent bg-gradient-to-r from-purple-400 via-pink-400 to-cyan-400"
+          className="text-6xl md:text-8xl font-bold mb-6 text-primary"
           initial={{ opacity: 0, y: 20 }}
           animate={{ opacity: 1, y: 0 }}
           transition={{ duration: 0.8, delay: 0.2 }}
@@ -71,7 +72,10 @@ export default function Hero() {
             whileHover={{ scale: 1.05 }}
             whileTap={{ scale: 0.95 }}
           >
-            <span className="relative z-10">Explore Tools</span>
+            <span className="relative z-10 inline-flex items-center gap-2">
+              <Toolbox className="h-5 w-5" />
+              Explore Tools
+            </span>
             <motion.div
               className="absolute inset-0 bg-gradient-to-r from-purple-600 to-cyan-600"
               initial={{ x: '100%' }}
@@ -80,22 +84,6 @@ export default function Hero() {
             />
           </motion.button>
 
-          <motion.a
-            href="https://dev.pivoine.art/valknar/kit-ui"
-            target="_blank"
-            rel="noopener noreferrer"
-            className="group px-8 py-4 rounded-full border-2 border-gray-600 text-gray-300 font-semibold hover:border-purple-400 hover:text-purple-400 transition-all duration-300 inline-flex items-center gap-2"
-            whileHover={{ scale: 1.05 }}
-            whileTap={{ scale: 0.95 }}
-          >
-            <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24" strokeWidth={2}>
-              <line x1="6" y1="3" x2="6" y2="15" strokeLinecap="round" />
-              <circle cx="18" cy="6" r="3" />
-              <circle cx="6" cy="18" r="3" />
-              <path d="M18 9a9 9 0 01-9 9" strokeLinecap="round" />
-            </svg>
-            View on Dev
-          </motion.a>
         </motion.div>
 
         {/* Scroll indicator */}

components/ToolCard.tsx

@@ -11,13 +11,11 @@ interface ToolCardProps {
   description: string;
   icon: ReactNode;
   url: string;
-  gradient: string;
-  accentColor: string;
   index: number;
   badges?: string[];
 }
 
-export default function ToolCard({ title, description, icon, url, gradient, accentColor, index, badges }: ToolCardProps) {
+export default function ToolCard({ title, description, icon, url, index, badges }: ToolCardProps) {
   return (
     <MotionLink
       href={url}
@@ -29,15 +27,8 @@ export default function ToolCard({ title, description, icon, url, gradient, acce
       whileHover={{ y: -10 }}
     >
       <div className="glass relative overflow-hidden rounded-2xl p-8 h-full transition-all duration-300 group-hover:shadow-2xl group-hover:bg-card/80">
-        {/* Gradient overlay on hover */}
+        {/* Subtle hover overlay */}
-        <div
+        <div className="absolute inset-0 opacity-0 group-hover:opacity-10 transition-opacity duration-300 bg-primary" />
-          className={`absolute inset-0 opacity-0 group-hover:opacity-15 transition-opacity duration-300 ${gradient}`}
-        />
-
-        {/* Glow effect */}
-        <div className="absolute inset-0 opacity-0 group-hover:opacity-100 transition-opacity duration-300 blur-xl -z-10">
-          <div className={`w-full h-full ${gradient} opacity-30`} />
-        </div>
 
         {/* Icon */}
         <motion.div
@@ -45,15 +36,13 @@ export default function ToolCard({ title, description, icon, url, gradient, acce
           whileHover={{ scale: 1.1, rotate: 5 }}
           transition={{ type: 'spring', stiffness: 300 }}
         >
-          <div className={`p-4 rounded-xl ${gradient} shadow-lg shadow-black/10`}>
+          <div className="p-4 rounded-xl bg-primary/10 text-primary shadow-lg shadow-black/5">
             {icon}
           </div>
         </motion.div>
 
         {/* Title */}
-        <h3
+        <h3 className="text-2xl font-bold mb-3 text-foreground transition-all duration-300 group-hover:text-primary">
-          className="text-2xl font-bold mb-3 text-foreground transition-all duration-300 group-hover:text-primary"
-        >
           {title}
         </h3>
 

components/ToolsGrid.tsx

@@ -2,55 +2,7 @@
 
 import { motion } from 'framer-motion';
 import ToolCard from './ToolCard';
-import { ColorIcon, UnitsIcon, ASCIIIcon, MediaIcon, FaviconIcon } from '@/components/AppIcons';
+import { tools } from '@/lib/tools';
-
-const tools = [
-  {
-    title: 'Color',
-    description: 'Modern color manipulation toolkit with palette generation, accessibility testing, and format conversion. Supports hex, RGB, HSL, Lab, and more.',
-    url: '/color',
-    gradient: 'gradient-indigo-purple',
-    accentColor: '#a855f7',
-    badges: ['Open Source', 'WCAG', 'Free'],
-    icon: <ColorIcon className="w-12 h-12 text-white" />,
-  },
-  {
-    title: 'Units',
-    description: 'Smart unit converter with 187 units across 23 categories. Real-time bidirectional conversion with fuzzy search.',
-    url: '/units',
-    gradient: 'gradient-cyan-purple',
-    accentColor: '#2dd4bf',
-    badges: ['Open Source', 'Real-time', 'Free'],
-    icon: <UnitsIcon className="w-12 h-12 text-white" />,
-  },
-  {
-    title: 'ASCII',
-    description: 'ASCII art text generator with 373 fonts. Create stunning text banners, terminal art, and retro designs with live preview and multiple export formats.',
-    url: '/ascii',
-    gradient: 'gradient-yellow-amber',
-    accentColor: '#eab308',
-    badges: ['Open Source', 'ASCII Art', 'Free'],
-    icon: <ASCIIIcon className="w-12 h-12 text-white" />,
-  },
-  {
-    title: 'Media',
-    description: 'Modern browser-based file converter powered by WebAssembly. Convert videos, images, and audio locally without server uploads. Privacy-first with no file size limits.',
-    url: '/media',
-    gradient: 'gradient-green-teal',
-    accentColor: '#10b981',
-    badges: ['Open Source', 'Converter', 'Free'],
-    icon: <MediaIcon className="w-12 h-12 text-white" />,
-  },
-  {
-    title: 'Favicon',
-    description: 'Generate a complete set of favicons for your website. Includes PWA manifest and HTML embed code. All processing happens locally in your browser.',
-    url: '/favicon',
-    gradient: 'gradient-blue-cyan',
-    accentColor: '#3b82f6',
-    badges: ['Open Source', 'Generator', 'Free'],
-    icon: <FaviconIcon className="w-12 h-12 text-white" />,
-  },
-];
 
 export default function ToolsGrid() {
   return (
@@ -74,19 +26,20 @@ export default function ToolsGrid() {
 
         {/* Tools grid */}
         <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-8">
-          {tools.map((tool, index) => (
+          {tools.map((tool, index) => {
-            <ToolCard
+            const Icon = tool.icon;
-              key={tool.title}
+            return (
-              title={tool.title}
+              <ToolCard
-              description={tool.description}
+                key={tool.href}
-              icon={tool.icon}
+                title={tool.title}
-              url={tool.url}
+                description={tool.summary}
-              gradient={tool.gradient}
+                icon={<Icon className="w-12 h-12" />}
-              accentColor={tool.accentColor}
+                url={tool.href}
-              badges={tool.badges}
+                badges={tool.badges}
-              index={index}
+                index={index}
-            />
+              />
-          ))}
+            );
+          })}
         </div>
       </div>
     </section>

components/color/ColorPage.tsx

@@ -0,0 +1,391 @@
+'use client';
+
+import { useState, useEffect, Suspense } from 'react';
+import { useSearchParams, useRouter } from 'next/navigation';
+import { ColorPicker } from '@/components/color/ColorPicker';
+import { ColorInfo } from '@/components/color/ColorInfo';
+import { ManipulationPanel } from '@/components/color/ManipulationPanel';
+import { PaletteGrid } from '@/components/color/PaletteGrid';
+import { ExportMenu } from '@/components/color/ExportMenu';
+import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
+import { AppPage } from '@/components/layout/AppPage';
+import { useColorInfo, useGeneratePalette, useGenerateGradient } from '@/lib/color/api/queries';
+import { Loader2, Share2, Palette, Plus, X, Layers } from 'lucide-react';
+import { Button } from '@/components/ui/button';
+import { Input } from '@/components/ui/input';
+import { Label } from '@/components/ui/label';
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from '@/components/ui/select';
+import { toast } from 'sonner';
+import { getToolByHref } from '@/lib/tools';
+
+const tool = getToolByHref('/color')!;
+
+type HarmonyType =
+  | 'monochromatic'
+  | 'analogous'
+  | 'complementary'
+  | 'triadic'
+  | 'tetradic';
+
+function PlaygroundContent() {
+  const searchParams = useSearchParams();
+  const router = useRouter();
+  const [color, setColor] = useState(() => {
+    // Initialize from URL if available
+    const urlColor = searchParams.get('color');
+    return urlColor ? `#${urlColor.replace('#', '')}` : '#ff0099';
+  });
+
+  // Harmony state
+  const [harmonyType, setHarmonyType] = useState<HarmonyType>('complementary');
+  const [palette, setPalette] = useState<string[]>([]);
+  const paletteMutation = useGeneratePalette();
+
+  // Gradient state
+  const [stops, setStops] = useState<string[]>(['#ff0099', '#0099ff']);
+  const [gradientCount, setGradientCount] = useState(10);
+  const [gradientResult, setGradientResult] = useState<string[]>([]);
+  const gradientMutation = useGenerateGradient();
+
+  const { data, isLoading, isError, error } = useColorInfo({
+    colors: [color],
+  });
+
+  const colorInfo = data?.colors[0];
+
+  // Update URL when color changes
+  useEffect(() => {
+    const hex = color.replace('#', '');
+    if (hex.length === 6 || hex.length === 3) {
+      router.push(`/color?color=${hex}`, { scroll: false });
+    }
+  }, [color, router]);
+
+  // Sync first gradient stop with active color
+  useEffect(() => {
+    const newStops = [...stops];
+    newStops[0] = color;
+    setStops(newStops);
+  }, [color]);
+
+  // Share color via URL
+  const handleShare = () => {
+    const url = `${window.location.origin}/color?color=${color.replace('#', '')}`;
+    navigator.clipboard.writeText(url);
+    toast.success('Link copied to clipboard!');
+  };
+
+  const generateHarmony = async () => {
+    try {
+      const result = await paletteMutation.mutateAsync({
+        base: color,
+        scheme: harmonyType,
+      });
+
+      const colors = [result.palette.primary, ...result.palette.secondary];
+      setPalette(colors);
+      toast.success(`Generated ${harmonyType} harmony palette`);
+    } catch (error) {
+      toast.error('Failed to generate harmony palette');
+      console.error(error);
+    }
+  };
+
+  const generateGradient = async () => {
+    try {
+      const result = await gradientMutation.mutateAsync({
+        stops,
+        count: gradientCount,
+      });
+      setGradientResult(result.gradient);
+      toast.success(`Generated ${result.gradient.length} colors`);
+    } catch (error) {
+      toast.error('Failed to generate gradient');
+    }
+  };
+
+  const addStop = () => {
+    setStops([...stops, '#000000']);
+  };
+
+  const removeStop = (index: number) => {
+    if (index === 0) return; // Prevent deleting the first stop (synchronized with picker)
+    if (stops.length > 2) {
+      setStops(stops.filter((_, i) => i !== index));
+    }
+  };
+
+  const updateStop = (index: number, colorValue: string) => {
+    const newStops = [...stops];
+    newStops[index] = colorValue;
+    setStops(newStops);
+    if (index === 0) setColor(colorValue);
+  };
+
+  const harmonyDescriptions: Record<HarmonyType, string> = {
+    monochromatic: 'Single color with variations',
+    analogous: 'Colors adjacent on the color wheel (±30°)',
+    complementary: 'Colors opposite on the color wheel (180°)',
+    triadic: 'Three colors evenly spaced on the color wheel (120°)',
+    tetradic: 'Four colors evenly spaced on the color wheel (90°)',
+  };
+
+  return (
+    <AppPage
+      title={tool.title}
+      description={tool.description}
+    >
+      <div className="space-y-6">
+        {/* Row 1: Workspace */}
+        <div className="grid grid-cols-1 lg:grid-cols-3 gap-6 items-stretch">
+          {/* Main Workspace: Color Picker and Information */}
+          <div className="lg:col-span-2">
+            <Card className="h-full">
+              <CardHeader className="flex flex-row items-center justify-between space-y-0">
+                <CardTitle>Color Picker</CardTitle>
+                <Button onClick={handleShare} variant="outline" size="xs">
+                  <Share2 className="h-3 w-3 mr-1" />
+                  Share
+                </Button>
+              </CardHeader>
+              <CardContent>
+                <div className="flex flex-col md:flex-row gap-8">
+                  <div className="flex-shrink-0 mx-auto md:mx-0">
+                    <ColorPicker color={color} onChange={setColor} />
+                  </div>
+
+                  <div className="flex-1 min-w-0">
+                    {isLoading && (
+                      <div className="flex items-center justify-center py-12">
+                        <Loader2 className="h-6 w-6 animate-spin text-muted-foreground" />
+                      </div>
+                    )}
+
+                    {isError && (
+                      <div className="p-3 bg-destructive/10 text-destructive rounded-lg text-sm">
+                        <p className="font-medium">Error loading color information</p>
+                        <p className="mt-1">{error?.message || 'Unknown error'}</p>
+                      </div>
+                    )}
+
+                    {colorInfo && <ColorInfo info={colorInfo} />}
+                  </div>
+                </div>
+              </CardContent>
+            </Card>
+          </div>
+
+          {/* Sidebar: Color Manipulation */}
+          <div className="lg:col-span-1">
+            <Card className="h-full">
+              <CardHeader>
+                <CardTitle>Adjustments</CardTitle>
+              </CardHeader>
+              <CardContent>
+                <ManipulationPanel color={color} onColorChange={setColor} />
+              </CardContent>
+            </Card>
+          </div>
+        </div>
+
+        {/* Row 2: Harmony Generator */}
+        <div className="grid grid-cols-1 lg:grid-cols-3 gap-6 items-stretch">
+          {/* Harmony Controls */}
+          <div className="lg:col-span-1">
+            <Card className="h-full">
+              <CardHeader>
+                <CardTitle>Harmony</CardTitle>
+              </CardHeader>
+              <CardContent className="space-y-4">
+                <Select
+                  value={harmonyType}
+                  onValueChange={(value) => setHarmonyType(value as HarmonyType)}
+                >
+                  <SelectTrigger className="w-full">
+                    <SelectValue placeholder="Select harmony" />
+                  </SelectTrigger>
+                  <SelectContent>
+                    <SelectItem value="monochromatic">Monochromatic</SelectItem>
+                    <SelectItem value="analogous">Analogous</SelectItem>
+                    <SelectItem value="complementary">Complementary</SelectItem>
+                    <SelectItem value="triadic">Triadic</SelectItem>
+                    <SelectItem value="tetradic">Tetradic (Square)</SelectItem>
+                  </SelectContent>
+                </Select>
+
+                <p className="text-xs text-muted-foreground">
+                  {harmonyDescriptions[harmonyType]}
+                </p>
+
+                <Button
+                  onClick={generateHarmony}
+                  disabled={paletteMutation.isPending}
+                  className="w-full"
+                >
+                  {paletteMutation.isPending ? (
+                    <>
+                      <Loader2 className="h-3.5 w-3.5 mr-1.5 animate-spin" />
+                      Generating...
+                    </>
+                  ) : (
+                    'Generate'
+                  )}
+                </Button>
+              </CardContent>
+            </Card>
+          </div>
+
+          {/* Harmony Results */}
+          <div className="lg:col-span-2">
+            <Card className="h-full">
+              <CardHeader>
+                <CardTitle>
+                  Palette {palette.length > 0 && <span className="text-muted-foreground font-normal text-sm ml-1">({palette.length})</span>}
+                </CardTitle>
+              </CardHeader>
+              <CardContent>
+                {palette.length > 0 ? (
+                  <div className="space-y-5">
+                    <PaletteGrid colors={palette} onColorClick={setColor} />
+                    <div className="pt-3 border-t">
+                      <ExportMenu colors={palette} />
+                    </div>
+                  </div>
+                ) : (
+                  <div className="py-8 text-center text-muted-foreground text-xs">
+                    <Palette className="h-8 w-8 mx-auto mb-2 opacity-20" />
+                    <p>Generate a harmony palette from the current color</p>
+                  </div>
+                )}
+              </CardContent>
+            </Card>
+          </div>
+        </div>
+
+        {/* Row 3: Gradient Generator */}
+        <div className="grid grid-cols-1 lg:grid-cols-3 gap-6 items-stretch">
+          {/* Gradient Controls */}
+          <div className="lg:col-span-1">
+            <Card className="h-full">
+              <CardHeader>
+                <CardTitle>Gradient</CardTitle>
+              </CardHeader>
+              <CardContent className="space-y-4">
+                <div className="space-y-2">
+                  <Label className="text-xs">Color Stops</Label>
+                  {stops.map((stop, index) => (
+                    <div key={index} className="flex items-center gap-2">
+                      <Input
+                        type="color"
+                        value={stop}
+                        onChange={(e) => updateStop(index, e.target.value)}
+                        className="w-9 h-9 p-1 shrink-0 cursor-pointer"
+                      />
+                      <Input
+                        type="text"
+                        value={stop}
+                        onChange={(e) => updateStop(index, e.target.value)}
+                        className="font-mono text-xs flex-1"
+                      />
+                      {index !== 0 && stops.length > 2 && (
+                        <Button
+                          variant="ghost"
+                          size="icon-xs"
+                          onClick={() => removeStop(index)}
+                        >
+                          <X className="h-3.5 w-3.5" />
+                        </Button>
+                      )}
+                    </div>
+                  ))}
+                  <Button onClick={addStop} variant="outline" className="w-full">
+                    <Plus className="h-3.5 w-3.5 mr-1.5" />
+                    Add Stop
+                  </Button>
+                </div>
+
+                <div className="space-y-2">
+                  <Label className="text-xs">Steps</Label>
+                  <Input
+                    type="number"
+                    min={2}
+                    max={100}
+                    value={gradientCount}
+                    onChange={(e) => setGradientCount(parseInt(e.target.value))}
+                  />
+                </div>
+
+                <Button
+                  onClick={generateGradient}
+                  disabled={gradientMutation.isPending}
+                  className="w-full"
+                >
+                  {gradientMutation.isPending ? (
+                    <>
+                      <Loader2 className="h-3.5 w-3.5 mr-1.5 animate-spin" />
+                      Generating...
+                    </>
+                  ) : (
+                    'Generate'
+                  )}
+                </Button>
+              </CardContent>
+            </Card>
+          </div>
+
+          {/* Gradient Results */}
+          <div className="lg:col-span-2">
+            <Card className="h-full">
+              <CardHeader>
+                <CardTitle>
+                  Gradient {gradientResult.length > 0 && <span className="text-muted-foreground font-normal text-sm ml-1">({gradientResult.length})</span>}
+                </CardTitle>
+              </CardHeader>
+              <CardContent>
+                {gradientResult.length > 0 ? (
+                  <div className="space-y-5">
+                    <div
+                      className="h-16 w-full rounded-lg border"
+                      style={{
+                        background: `linear-gradient(to right, ${gradientResult.join(', ')})`,
+                      }}
+                    />
+                    <PaletteGrid colors={gradientResult} onColorClick={setColor} />
+                    <div className="pt-3 border-t">
+                      <ExportMenu colors={gradientResult} />
+                    </div>
+                  </div>
+                ) : (
+                  <div className="py-8 text-center text-muted-foreground text-xs">
+                    <Layers className="h-8 w-8 mx-auto mb-2 opacity-20" />
+                    <p>Add color stops and generate a smooth gradient</p>
+                  </div>
+                )}
+              </CardContent>
+            </Card>
+          </div>
+        </div>
+      </div>
+    </AppPage>
+  );
+}
+
+export function ColorPage() {
+  return (
+    <Suspense fallback={
+      <div className="min-h-screen py-12">
+        <div className="max-w-7xl mx-auto px-8 flex items-center justify-center">
+          <Loader2 className="h-8 w-8 animate-spin text-muted-foreground" />
+        </div>
+      </div>
+    }>
+      <PlaygroundContent />
+    </Suspense>
+  );
+}

components/layout/AppHeader.tsx

@@ -1,63 +1,42 @@
 'use client';
 
-import * as React from 'react';
 import Link from 'next/link';
-import { usePathname } from 'next/navigation';
+import { Menu, X, PanelLeftClose, PanelLeftOpen } from 'lucide-react';
-import { Menu, ChevronRight, X } from 'lucide-react';
 import { Button } from '@/components/ui/button';
-import { cn } from '@/lib/utils/cn';
 import { useSidebar } from './SidebarProvider';
 import Logo from '@/components/Logo';
 
 export function AppHeader() {
-  const pathname = usePathname();
+  const { toggle, isOpen, isCollapsed, toggleCollapse } = useSidebar();
-  const { toggle, isOpen } = useSidebar();
-  
-  // Custom breadcrumb logic
-  const pathSegments = pathname.split('/').filter(Boolean);
 
   return (
-    <header className="h-16 border-b border-border bg-background/10 backdrop-blur-xl sticky top-0 z-40 flex items-center justify-between pl-8 pr-5 md:pr-9 shadow-[0_1px_3px_0_rgb(0_0_0/0.05)]">
+    <header className="h-16 border-b border-border bg-background/10 backdrop-blur-xl sticky top-0 z-40 flex items-center justify-between px-6 shadow-[0_1px_3px_0_rgb(0_0_0/0.05)]">
-      <div className="flex items-center gap-4">
-        <nav className="flex items-center text-sm font-medium">
-          <Link href="/" className="flex items-center gap-2">
-            <Logo size={20} className="lg:hidden" />
-            <span className="font-medium transition-colors text-foreground/80 hover:text-foreground">
-              Kit
-            </span>
-          </Link>
-          {pathSegments.map((segment, index) => {
-            const href = `/${pathSegments.slice(0, index + 1).join('/')}`;
-            const isLast = index === pathSegments.length - 1;
-            
-            return (
-              <React.Fragment key={href}>
-                <ChevronRight className="h-4 w-4 mx-1 text-muted-foreground/50" />
-                <Link 
-                  href={href}
-                  className={cn(
-                    "capitalize transition-colors text-foreground/80 hover:text-foreground",
-                    isLast ? "font-semibold" : "font-medium"
-                  )}
-                >
-                  {segment.replace(/-/g, ' ')}
-                </Link>
-              </React.Fragment>
-            );
-          })}
-        </nav>
-      </div>
-
       <div className="flex items-center gap-2">
         <Button
           variant="ghost"
           size="icon"
-          className="lg:hidden text-muted-foreground hover:text-foreground"
+          className="hidden lg:inline-flex text-muted-foreground hover:text-foreground"
-          onClick={toggle}
+          onClick={toggleCollapse}
         >
-          {isOpen ? <X className="h-5 w-5" /> : <Menu className="h-5 w-5" />}
+          {isCollapsed ? (
+            <PanelLeftOpen className="h-5 w-5" />
+          ) : (
+            <PanelLeftClose className="h-5 w-5" />
+          )}
         </Button>
+        <Link href="/" className="lg:hidden shrink-0 ml-2">
+          <Logo size={24} />
+        </Link>
       </div>
+
+      <Button
+        variant="ghost"
+        size="icon"
+        className="lg:hidden text-muted-foreground hover:text-foreground"
+        onClick={toggle}
+      >
+        {isOpen ? <X className="h-5 w-5" /> : <Menu className="h-5 w-5" />}
+      </Button>
     </header>
   );
 }

components/layout/AppPage.tsx

@@ -1,7 +1,9 @@
 'use client';
 
 import * as React from 'react';
+import { usePathname } from 'next/navigation';
 import { cn } from '@/lib/utils';
+import { getToolByHref } from '@/lib/tools';
 
 interface AppPageProps {
   title: string;
@@ -11,11 +13,19 @@ interface AppPageProps {
 }
 
 export function AppPage({ title, description, children, className }: AppPageProps) {
+  const pathname = usePathname();
+  const firstSegment = pathname.split('/').filter(Boolean)[0];
+  const tool = getToolByHref(`/${firstSegment ?? ''}`);
+  const Icon = tool?.icon;
+
   return (
     <div className={cn("min-h-screen py-8", className)}>
       <div className="max-w-7xl mx-auto px-8 space-y-6 animate-fade-in">
         <div>
-          <h1 className="text-2xl font-bold mb-1">{title}</h1>
+          <div className="flex items-center gap-3 mb-1">
+            {Icon && <Icon className="h-6 w-6 text-primary shrink-0" />}
+            <h1 className="text-2xl font-bold">{title}</h1>
+          </div>
           {description && (
             <p className="text-sm text-muted-foreground">
               {description}

components/layout/AppSidebar.tsx

@@ -1,67 +1,17 @@
 'use client';
 
-import * as React from 'react';
 import Link from 'next/link';
 import { usePathname } from 'next/navigation';
-import { 
+import { X } from 'lucide-react';
-  ChevronRight,
-  ChevronLeft,
-  X
-} from 'lucide-react';
 import { cn } from '@/lib/utils/cn';
 import Logo from '@/components/Logo';
 import { useSidebar } from './SidebarProvider';
 import { Button } from '@/components/ui/button';
-import { ColorIcon, UnitsIcon, ASCIIIcon, MediaIcon, FaviconIcon } from '@/components/AppIcons';
+import { tools } from '@/lib/tools';
-
-interface NavItem {
-  title: string;
-  href: string;
-  icon: React.ElementType | React.ReactNode;
-  items?: { title: string; href: string }[];
-}
-
-interface NavGroup {
-  label: string;
-  items: NavItem[];
-}
-
-const navigation: NavGroup[] = [
-  {
-    label: 'Toolkit',
-    items: [
-      { 
-        title: 'Units Converter', 
-        href: '/units', 
-        icon: <UnitsIcon className="h-4 w-4" /> 
-      },
-      { 
-        title: 'ASCII Art', 
-        href: '/ascii', 
-        icon: <ASCIIIcon className="h-4 w-4" /> 
-      },
-      { 
-        title: 'Color Manipulation', 
-        href: '/color', 
-        icon: <ColorIcon className="h-4 w-4" />
-      },
-      { 
-        title: 'Media Converter', 
-        href: '/media', 
-        icon: <MediaIcon className="h-4 w-4" /> 
-      },
-      { 
-        title: 'Favicon Generator', 
-        href: '/favicon', 
-        icon: <FaviconIcon className="h-4 w-4" /> 
-      },
-    ]
-  }
-];
 
 export function AppSidebar() {
   const pathname = usePathname();
-  const { isOpen, isCollapsed, close, toggleCollapse } = useSidebar();
+  const { isOpen, isCollapsed, close } = useSidebar();
 
   return (
     <>
@@ -76,115 +26,88 @@ export function AppSidebar() {
       <aside className={cn(
         "fixed inset-y-0 left-0 z-50 flex flex-col border-r border-border bg-background/20 backdrop-blur-2xl transition-all duration-300 ease-in-out lg:relative lg:h-full",
         isOpen ? "translate-x-0" : "-translate-x-full lg:translate-x-0",
-        isCollapsed ? "lg:w-20" : "w-64"
+        isCollapsed ? "lg:w-14" : "w-64"
       )}>
         {/* Sidebar Header */}
-        <div className="flex h-16 items-center justify-between px-6 shrink-0 border-b border-border">
+        <div className={cn(
-          <Link href="/" className="flex items-center gap-3 group overflow-hidden">
+          "flex h-16 items-center shrink-0 border-b border-border",
+          isCollapsed ? "justify-center px-2" : "justify-between px-5"
+        )}>
+          <Link href="/" className={cn(
+            "flex items-center group overflow-hidden",
+            isCollapsed ? "justify-center" : "gap-3"
+          )}>
             <div className="shrink-0">
-              <Logo size={isCollapsed ? 24 : 24} />
+              <Logo size={isCollapsed ? 20 : 28} />
             </div>
             {!isCollapsed && (
-              <span className="font-bold text-xl transition-colors text-foreground">
+              <div className="min-w-0">
-                Kit
+                <span className="font-bold text-lg leading-tight block text-foreground">
-              </span>
+                  Kit
+                </span>
+                <span className="text-[10px] leading-tight text-muted-foreground block">
+                  Browser-first toolkit
+                </span>
+              </div>
             )}
           </Link>
-          <Button 
+          {!isCollapsed && (
-            variant="ghost" 
+            <Button
-            size="icon" 
+              variant="ghost"
-            className="lg:hidden text-muted-foreground"
+              size="icon"
-            onClick={close}
+              className="lg:hidden text-muted-foreground"
-          >
+              onClick={close}
-            <X className="h-5 w-5" />
+            >
-          </Button>
+              <X className="h-5 w-5" />
+            </Button>
+          )}
         </div>
 
         {/* Navigation */}
-        <nav className="flex-1 overflow-y-auto px-4 py-2 space-y-6 mt-4 overflow-x-hidden">
+        <nav className={cn(
-          {navigation.map((group) => (
+          "flex-1 overflow-y-auto py-2 space-y-6 mt-4 overflow-hidden scrollbar",
-            <div key={group.label}>
+          isCollapsed ? "px-2" : "px-4"
-              <div className="space-y-0.5">
+        )}>
-                {group.items.map((item) => {
+          <div className="space-y-0.5">
-                  const isActive = pathname === item.href || (item.href !== '/' && pathname.startsWith(item.href));
+            {tools.map((tool) => {
+              const isActive = pathname === tool.href || (tool.href !== '/' && pathname.startsWith(tool.href));
+              const Icon = tool.icon;
 
-                  return (
+              return (
-                    <div key={item.href} className="space-y-1">
+                <div key={tool.href} className="space-y-1">
-                      <Link
+                  <Link
-                        href={item.href}
+                    href={tool.href}
-                        onClick={() => { if (window.innerWidth < 1024) close(); }}
+                    onClick={() => { if (window.innerWidth < 1024) close(); }}
-                        className={cn(
+                    className={cn(
-                          "flex items-center px-3 py-1.5 rounded-lg text-sm font-medium transition-all duration-300 relative group/item",
+                      "flex items-center px-3 py-2 rounded-lg text-sm font-medium transition-all duration-300 relative group/item",
-                          isActive
+                      isActive
-                            ? "bg-primary/10 text-primary border-l-2 border-primary"
+                        ? "bg-primary/10 text-primary border-l-2 border-primary"
-                            : "text-foreground/80 hover:bg-accent/50 hover:text-foreground",
+                        : "text-foreground/80 hover:bg-accent/50 hover:text-foreground",
-                          isCollapsed ? "justify-center" : "justify-between"
+                      isCollapsed ? "justify-center" : "justify-between"
-                        )}
+                    )}
-                        title={isCollapsed ? item.title : undefined}
+                    title={isCollapsed ? tool.navTitle : undefined}
-                      >
+                  >
-                        <div className="flex items-center gap-3">
+                    <div className="flex items-center gap-3 min-w-0">
-                          <span className={cn(
+                      <span className={cn(
-                            "transition-colors duration-300 shrink-0",
+                        "transition-colors duration-300 shrink-0",
-                            isActive ? "text-primary" : "text-foreground/80 group-hover/item:text-foreground"
+                        isActive ? "text-primary" : "text-foreground/80 group-hover/item:text-foreground"
-                          )}>
+                      )}>
-                            {React.isValidElement(item.icon) ? item.icon : null}
+                        <Icon className="h-4 w-4" />
-                          </span>
+                      </span>
-                          {!isCollapsed && <span className="whitespace-nowrap">{item.title}</span>}
+                      {!isCollapsed && (
-                        </div>
+                        <div className="min-w-0">
-                        
+                          <span className="whitespace-nowrap block">{tool.navTitle}</span>
-                        {!isCollapsed && item.items && (
+                          <span className="text-[10px] text-muted-foreground leading-tight block line-clamp-2">{tool.description}</span>
-                          <ChevronRight className={cn(
-                            "h-3.5 w-3.5 transition-transform duration-300",
-                            pathname.startsWith(item.href) && "rotate-90"
-                          )} />
-                        )}
-                      </Link>
-                      
-                      {item.items && pathname.startsWith(item.href) && !isCollapsed && (
-                        <div className="ml-9 space-y-1 border-l border-border pl-2 mt-1">
-                          {item.items.map((subItem) => (
-                            <Link
-                              key={subItem.href}
-                              href={subItem.href}
-                              onClick={() => { if (window.innerWidth < 1024) close(); }}
-                              className={cn(
-                                "block px-3 py-1.5 rounded-lg text-xs font-medium transition-all duration-200",
-                                pathname === subItem.href
-                                  ? "text-primary bg-primary/5 font-semibold" 
-                                  : "text-muted-foreground hover:text-foreground hover:bg-accent/50"
-                              )}
-                            >
-                              {subItem.title}
-                            </Link>
-                          ))}
                         </div>
                       )}
                     </div>
-                  );
+                  </Link>
-                })}
+                </div>
-              </div>
+              );
-            </div>
+            })}
-          ))}
+          </div>
         </nav>
 
-        {/* Sidebar Footer / Desktop Toggle */}
-        <div className="p-4 border-t border-border hidden lg:block">
-          <Button
-            variant="ghost"
-            size="sm"
-            className="w-full flex items-center justify-center gap-2 text-muted-foreground hover:text-foreground"
-            onClick={toggleCollapse}
-          >
-            {isCollapsed ? (
-              <ChevronRight className="h-4 w-4" />
-            ) : (
-              <>
-                <ChevronLeft className="h-4 w-4" />
-                <span className="text-xs font-semibold uppercase tracking-wider">Collapse</span>
-              </>
-            )}
-          </Button>
-        </div>
       </aside>
     </>
   );

lib/tools.tsx

@@ -0,0 +1,97 @@
+import { ColorIcon, UnitsIcon, ASCIIIcon, MediaIcon, FaviconIcon } from '@/components/AppIcons';
+
+export interface Tool {
+  /** Short display name (e.g. "Color") */
+  shortTitle: string;
+  /** Full display name (e.g. "Color Manipulation") */
+  title: string;
+  /** Sidebar / nav label (may differ from title) */
+  navTitle: string;
+  /** Route path, e.g. '/color' */
+  href: string;
+  /** One-liner shown in page header */
+  description: string;
+  /** Longer description for the landing-page card */
+  summary: string;
+  /** Icon component */
+  icon: React.ElementType;
+  /** Tailwind gradient utility class for the landing card */
+  gradient: string;
+  /** Hex accent color for the landing card */
+  accentColor: string;
+  /** Badge labels for the landing card */
+  badges: string[];
+}
+
+export const tools: Tool[] = [
+  {
+    shortTitle: 'Color',
+    title: 'Color Manipulation',
+    navTitle: 'Color Manipulation',
+    href: '/color',
+    description: 'Interactive color manipulation and analysis tool',
+    summary:
+      'Modern color manipulation toolkit with palette generation, accessibility testing, and format conversion. Supports hex, RGB, HSL, Lab, and more.',
+    icon: ColorIcon,
+    gradient: 'gradient-indigo-purple',
+    accentColor: '#a855f7',
+    badges: ['Open Source', 'WCAG', 'Free'],
+  },
+  {
+    shortTitle: 'Units',
+    title: 'Units Converter',
+    navTitle: 'Units Converter',
+    href: '/units',
+    description: 'Smart unit converter with 187 units across 23 categories',
+    summary:
+      'Smart unit converter with 187 units across 23 categories. Real-time bidirectional conversion with fuzzy search.',
+    icon: UnitsIcon,
+    gradient: 'gradient-cyan-purple',
+    accentColor: '#2dd4bf',
+    badges: ['Open Source', 'Real-time', 'Free'],
+  },
+  {
+    shortTitle: 'ASCII',
+    title: 'ASCII Art Generator',
+    navTitle: 'ASCII Art',
+    href: '/ascii',
+    description: 'ASCII Art Text Generator with 373 Fonts',
+    summary:
+      'ASCII art text generator with 373 fonts. Create stunning text banners, terminal art, and retro designs with live preview and multiple export formats.',
+    icon: ASCIIIcon,
+    gradient: 'gradient-yellow-amber',
+    accentColor: '#eab308',
+    badges: ['Open Source', 'ASCII Art', 'Free'],
+  },
+  {
+    shortTitle: 'Media',
+    title: 'Media Converter',
+    navTitle: 'Media Converter',
+    href: '/media',
+    description: 'Professional browser-based media conversion for video, audio, and images',
+    summary:
+      'Modern browser-based file converter powered by WebAssembly. Convert videos, images, and audio locally without server uploads. Privacy-first with no file size limits.',
+    icon: MediaIcon,
+    gradient: 'gradient-green-teal',
+    accentColor: '#10b981',
+    badges: ['Open Source', 'Converter', 'Free'],
+  },
+  {
+    shortTitle: 'Favicon',
+    title: 'Favicon Generator',
+    navTitle: 'Favicon Generator',
+    href: '/favicon',
+    description: 'Create a complete set of icons for your website including PWA manifest and HTML code.',
+    summary:
+      'Generate a complete set of favicons for your website. Includes PWA manifest and HTML embed code. All processing happens locally in your browser.',
+    icon: FaviconIcon,
+    gradient: 'gradient-blue-cyan',
+    accentColor: '#3b82f6',
+    badges: ['Open Source', 'Generator', 'Free'],
+  },
+];
+
+/** Look up a tool by its href path */
+export function getToolByHref(href: string): Tool | undefined {
+  return tools.find((t) => t.href === href);
+}