refactor: add link variant to Button component and enhance CallToAction and HomeDesign styling

- Added 'link' variant to Button with baseStyles and variantStyles for cyan, white, and dark colors
- Updated Button type definitions to include link variant with proper color options
- Refactored default variant/color logic to use explicit conditionals for type safety
- Changed outline variant border from single to border-2 and added font-semibold
- Updated outline variant hover states to include text

src/pages/home/CallToAction.tsx

@@ -1,4 +1,3 @@
-import { Link } from 'react-router-dom';
 import { Container } from '@/components/Container'
 import { Button } from '@/components/Button'
 import { H3, P } from '@/components/Texts'
@@ -27,7 +26,7 @@ export function CallToAction() {
             cx={512}
             cy={512}
             fill="url(#mycelium-cyan-glow)"
-            fillOpacity="0.2"
+            fillOpacity="0.4"
           />
           <defs>
             <radialGradient id="mycelium-cyan-glow">
@@ -67,9 +66,9 @@ export function CallToAction() {
                 Deploy in Cloud
               </Button>
 
-              <Link to="/nodes" className="text-cyan-400 hover:text-cyan-300 transition-colors">
+              <Button to="/nodes" variant="link" color="cyan">
                 Host a Node &rarr;
-              </Link>
+              </Button>
             </div>
           </div>
         </Container>

src/pages/home/HomeDesign.tsx

@@ -54,7 +54,7 @@ export function HomeDesign() {
           {benefits.map((item) => (
             <div
               key={item.id}
-              className="mt-8 group flex items-start gap-2 bg-white px-8 py-12 border border-gray-200 lg:border-t lg:border-b border-l-0.5 border-r-0.5"
+              className="mt-8 group flex items-start gap-2 bg-white px-8 py-12 border border-gray-200 lg:border-t lg:border-b border-l-0.5 border-r-0.5 transition-all duration-300 ease-in-out hover:scale-[1.02] hover:border-cyan-500 hover:shadow-lg hover:shadow-cyan-500/20"
             >
               {/* Image on the LEFT */}
               <img