Remove display: fixed from the navigation menu for better layout consistency.
Use prepend to ensure the navigation menu is rendered above other pages.
Delete the line this.container.classList.add("navigation-menu"); from NavigationMenu.js to avoid redundant class additions.
Comment out the line bg.classList.add("background"); in Marketplace.js as it is extraneous.
Remove display: fixed from the navigation menu for better layout consistency. Use prepend to ensure the navigation menu is rendered above other pages. Delete the line this.container.classList.add("navigation-menu"); from NavigationMenu.js to avoid redundant class additions. Comment out the line bg.classList.add("background"); in Marketplace.js as it is extraneous.