We've noticed for certain users, the menu may import slightly different than the way we configured it in our demo, likely due to having a different version of Divi installed. No worries - this is an easy fix! Just follow the steps below:
1. Login to your site and go to Divi > Theme Customizer > Header & Navigation > Slide In & Fullscreen Header Settings and set the 'Background Color' to black (or whatever color you want).
2. Go to Divi > Theme Customizer > Header & Navigation > Header Elements and be sure that the "Show Search Icon" box is checked.
Publish your changes and you should have an exact replica of the Sophie demo page.