How to place navigation menu UNDER  the logo

Site URL: https://hervedaridan.squarespace.com/config/pages

Hi there! I have not been able to find an option to place the navigation menu UNDER  the logo, keeping both on the left, like on the example underneath (and with instagram on the same line with Navigation & float right)

Thank you so much! 

Add to Design > Custom CSS

.header-title-nav-wrapper {
    flex-direction: column;
    align-items: flex-start;
}

Thank you so much Tuanphan! It worked great!