refine: landing page and 404 for clean consistent look

Hero: Kit. title with primary dot, arrow-down CTA, minimal line scroll
indicator. Stats: rounded-2xl + icon border matching cards. ToolsGrid:
proper h2 with gradient accent word. ToolCard: visible rest border,
radial glow, bigger icon+arrow. Footer: visible Source label, consistent
border. 404: fade gradient number, divider line, rounded-xl CTA.

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

components/Logo.tsx

@@ -28,7 +28,7 @@ export default function Logo({ className = '', size = 120 }: { className?: strin
       {/* Brush (Lucide) - horizontal flipped */}
       <g
         transform="translate(32, 30) rotate(90) scale(3.025) translate(-11.25, -11)"
-        style={{ animation: 'pathFlicker 0.9s ease-out 0.35s both' }}
+        style={{ animation: 'pathFlicker 0.9s ease-out 0.15s both' }}
       >
         <path
           d="m11 10l3 3m-7.5 8A3.5 3.5 0 1 0 3 17.5a2.62 2.62 0 0 1-.708 1.792A1 1 0 0 0 3 21z"