feat: complete wcag accessibility and contrast improvements

components/home/Hero.tsx

@@ -38,7 +38,7 @@ export default function Hero() {
             </Heading>
           </div>
           <div>
-            <p className="text-lg md:text-xl text-white/90 leading-relaxed max-w-2xl mb-10 md:mb-12">
+            <p className="text-lg md:text-xl text-white leading-relaxed max-w-2xl mb-10 md:mb-12">
               {t('subtitle')}
             </p>
           </div>
@@ -57,7 +57,9 @@ export default function Hero() {
                 }
               >
                 {t('cta')}
-                <span className="transition-transform group-hover/btn:translate-x-1">&rarr;</span>
+                <span className="transition-transform group-hover/btn:translate-x-1 ml-2">
+                  &rarr;
+                </span>
               </Button>
             </div>
             <div>