navegacao-demo.php

 <header class="fixed-top mb-5">
	<div class="px-3 py-2 bg-purple-800 text-white">
	  <div class="container">
		<div class="d-flex flex-wrap align-items-center justify-content-center justify-content-lg-start">
		  <a href="/" class="d-flex align-items-center my-2 my-lg-0 me-lg-auto text-white text-decoration-none">
		  	<img src="<?php echo $url_site; ?>/assets/img/logo-cobib-header.png" alt="">
			Cobib
		  </a>

		  <ul class="nav col-12 col-lg-auto my-2 justify-content-center my-md-0 text-small text-center">
			<li>
			  <a href="<?php echo $url_site; ?>/catalogo" class="nav-link text-white">
				<i class="bi-book fs-5" role="img"></i><br>
				Catálogo
			  </a>
			</li>
			<li>
			  <a href="<?php echo $url_site; ?>/adicionar" class="nav-link text-white">
				<i class="bi-plus-circle fs-5" role="img"></i><br>
				Adicionar livro
			  </a>
			</li>
			<li>
			  <a href="<?php echo $url_site; ?>/conta" class="nav-link text-white">
				<i class="bi-person-circle fs-5" role="img"></i><br>
				Conta
			  </a>
			</li>
		  </ul>
		</div>
	  </div>
	</div>

  </header>