feat: various improvements in styles and layout

assets/styles/components/button.css

@@ -14,12 +14,13 @@
 }
 
 .button--secondary {
-    @apply bg-none bg-primary-light text-white;
+    @apply bg-none bg-primary-dark text-white;
     @apply hover:bg-primary-light/80;
 }
 
 .button--primary {
-    @apply bg-pink text-white;
+    background: linear-gradient(120deg, #960167 0%, #9e036a 40%, #fa1a8c 100%);
+    @apply text-white;
     @apply hover:bg-none hover:bg-pink/80;
 }