I love sticky top menus...

So that was the first thing I tackled when I started this site.

The HTML in the "header" position looks like this:

<header class="header container-header full-width <?php echo $stickyHeader; ?>">
		<div class="grid-child">
			<div class="navbar-brand">
				<a class="brand-logo" href="/<?php echo $this->baseurl; ?>/">
					<?php echo $logo; ?>
				<?php if ($this->params->get('siteDescription')) : ?>
					<div class="site-description"><?php echo htmlspecialchars($this->params->get('siteDescription')); ?></div>
				<?php endif; ?>
		<?php if ($this->countModules('menu', true) || $this->countModules('search', true)) : ?>
			<div class="grid-child container-nav">
				<?php if ($this->countModules('menu', true)) : ?>
					<nav class="navbar navbar-expand-md">
						<?php HTMLHelper::_('bootstrap.collapse', '.navbar-toggler'); ?>
						<button class="navbar-toggler navbar-toggler-right" type="button" data-bs-toggle="collapse" data-bs-target="#navbar" aria-controls="navbar" aria-expanded="false" aria-label="<?php echo Text::_('TPL_CASSIOPEIA_TOGGLE'); ?>">
							<span class="icon-menu" aria-hidden="true"></span>
						<div class="collapse navbar-collapse" id="navbar">
							<jdoc:include type="modules" name="menu" style="none" />
				<?php endif; ?>
				<?php if ($this->countModules('search', true)) : ?>
					<div class="container-search">
						<jdoc:include type="modules" name="search" style="none" />
				<?php endif; ?>
		<?php endif; ?>

So the <header> div contains three main divs:

  • child-grid, with two divs: brand-logo and site description,
  • container-nav, with the divs necessary for a nice collapsible menu,
  • and container-search.

For now, I've just put the first child-grid to display:none; (and tweaked margins, padding, and display), which is fine for now, but I will have to insert my logo, which should also be sticky and overlap the image in the banner position. Well, that was pretty simple! Added a fixed height to .navbar-brand!