This webpage generator works by expanding off the text inputted here. For the best result, I usually recommend leaving a hanging style tag to ensure the AI creates some styles to prevent a completely blank webpage.

Another thing to consider is the webpage's title. If you don't provide one, it is more likely to result with a blank or mostly blank page. From my testing, having a webpage title include someone's name ([name]'s webpage) or tailored to what you want to create (Calculator App) works best.