Видео с ютуба Css Dropdown Menu Flexbox

Выпадающее Меню для сайта на чистом JavaScript | Responsive Mega Dropdown Menu (HTML, CSS,JS)

Responsive Navigation Bar with Submenu Using HTML & CSS | Modern Website Menu Design

Master CSS Flexbox – Complete Tutorial with All Properties Explained

Positioning a Child Element Justified Right in a Parent Container using Flexbox