This documentation page is for Quform version 1 and may not be applicable for Quform 2 click here to visit the documentation for Quform 2.
It depends on the complexity of your design so times may vary. All the CSS layout and alignments are controlled elsewhere so all you need to do is make the form elements look pretty via the theme CSS. You can copy one of our themes as a base, so you do not have to restyle all elements.