Remove unused variable

Fix Next button disabled bug

Improve placeholder text

Add a simple footer

Add a link to USCIS Reference Document and tooltip

Fix navbar style on large desktop

Add favicon

Automatically play the word when click Previous or Next word button

Show submit result on the page instead of using alert()

Update form layout

Use icon for voice options and move it to nav bar

Add Bootstrap icons CDN

Full width navbar

Show result by comparing answers on submit

Update practice area section layout