The Main Header elements has its own color features. To change the background color and element color, please go to Customizer → Header Settings → Main Header Style and change the Element’s color to white.
If you wrap the pattern/block with group block and set the group block to full width. It will adjust the inner block content to container width by setting the margin auto.
My account in our site is from where you log in to Freemius Dashboard after you purchase a theme. You will get Login credentials info in your receipt.
PRO version of Yuma comes with additional features and more support.
For detailed info: https://yuma.sharkthemes.com/compare-table/
Go to the link below to learn to import prebuilt demo sites.