No worries. There is no dress code other than no tank tops on men, no torn jeans, no swimsuits and no t-shirts was distasteful pictures or words.
As long as you are not wearing one of the above, you are "properly dressed". You won't be stopped nor will anyone else. Disney tried to institute a business casual dress standard some time ago, but it never took. So, they gave up.
You'll see everything from cargo shorts, t-shirts and sandals to khakis and sun dresses. I certainly haven't seen any cocktail dresses on women or jackets on men. Theme park wear is fine.
If you want to dine in a place with a real dress code, V&A is the only restaurant at WDW in that category.