Change the position of the menue points / making the background transparent

Dear Catch-Theme-Support, I am owner of the Adonis Pro Theme. Here is my website: www.sternenwanderer.org I would like to change the Menue-Points in the main.menue: 1. Make the background transparent (like the rest of the website) 2. Put the the sub-menue-point side by side under the red line not among themselves 3. deleting the link in the main point Is this possible by ccs? To explain this better, I would like to send you a picture. Thanks for your support, Oliver