For example, I have a header and some content part on my site. How to make it so that when you change the screen expansion, both header and content always remain on the same line, that is, do not disperse. `
<header> <div class="content-header"> <div class="container-fluid"> <div class="row align-items-center justify-content-center header-content"> <div class="col-md-auto"> </div> <div class="col-md-auto"> </div> <div class="col-md-auto"> </div> </div> </div> </div> </header> <section class="main-section"> <div class="container-fluid"> <div class="row justify-content-center"> <div class="col-md-auto"> </div> <div class="col-md-auto"> <form class="main-section-form" method="POST" action="/form.php" > </form> </div> </div> </div> </section>