refactor: remove redundant height constraint from phone frame image

- Changed background from white/90 to transparent for better visual consistency
- Removed hover state from cyan outline variant to simplify interaction design

src/components/Button.tsx

@@ -5,7 +5,7 @@ const baseStyles = {
   solid:
     'inline-flex justify-center rounded-full py-2 px-5 text-base font-semibold transition-colors',
   outline:
-    'inline-flex justify-center bg-white/90 hover:bg-[#fafafa] rounded-full border py-[calc(--spacing(2)-1px)] px-[calc(--spacing(5)-1px)] text-base transition-colors',
+    'inline-flex justify-center bg-transparent rounded-full border py-[calc(--spacing(2)-1px)] px-[calc(--spacing(5)-1px)] text-base transition-colors',
 }
 
 const variantStyles = {
@@ -17,7 +17,7 @@ const variantStyles = {
     green: 'bg-green-500 text-white hover:bg-green-600',
   },
   outline: {
-    cyan: 'border-cyan-500 text-cyan-500 hover:bg-cyan-50',
+    cyan: 'border-cyan-500 text-cyan-500',
     gray: 'border-gray-300 text-gray-700 hover:border-cyan-500 active:border-cyan-500',
     white: 'border-gray-300 text-white hover:border-cyan-500 active:border-cyan-500',
   },

src/pages/network/Hero.tsx

@@ -107,7 +107,7 @@ export function Hero() {
               <img
                 src={phoneFrame}
                 alt="Mycelium application demo"
-                className="mx-auto h-full w-auto max-w-[366px]"
+                className="mx-auto w-auto max-w-[366px]"
                 width={366}
                 height={729}
               />