fix: cosmetic

src/routes/+page.svelte

@@ -1123,7 +1123,7 @@
 										<button
 											class="{prompt !== ''
 												? 'bg-black text-white hover:bg-gray-900 dark:bg-white dark:text-black dark:hover:bg-gray-100 '
-												: 'text-white bg-gray-100 dark:text-gray-400 dark:bg-gray-600 disabled'} transition rounded-lg p-1.5"
+												: 'text-white bg-gray-100 dark:text-gray-800 dark:bg-gray-600 disabled'} transition rounded-lg p-1.5"
 											type="submit"
 											disabled={prompt === ''}
 										>