tagline / site-description below title

Hello,

I managed to activate and move the tagline below the title following this instruction (changed the header.php + added the lines into the style.css - both via child theme):

https://colorlibsupport.com/t/dazzling-site-tagline/

It works fine so far if you use the firefox browser but with the internet explorer, the position (right up next to the title) is the same as if i did not add this to the style.css:

header.php

							<div id="logo">
								<span class="site-name"><a class="navbar-brand" href="<?php echo esc_url( home_url( '/' ) ); ?>" title="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>" rel="home"><?php bloginfo( 'name' ); ?></a></span>
								<span id="site-description"><?php bloginfo( 'description' ); ?></span>								
							</div><!-- end of #logo -->

style.css

#site-description {
	display: block;
	font-size: 14px;
	color: #F5F7FA;
	margin-bottom: 5px;
}
a.navbar-brand {
	padding-left: 0;
	padding-bottom: 0px;
	height: 30px;
}

website: www.wirsinken.de

I managed to do it full-responsive (thanks bootstrap) with the following code:

<span class="site-name"><a class="navbar-brand" href="<?php echo esc_url( home_url( '/' ) ); ?>" title="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>" rel="home"><?php bloginfo( 'name' ); ?>.com <small class="text-danger visible-sm-block visible-md-inline-block visible-lg-inline-block"><?php bloginfo( 'description' ); ?></small></a></span>

Edit where needed (like removing the .com) and tell me if it worked for you.

Thank you for the code it did something: Now the description is always right to the title not below it, but in all browsers. I am not sure what to change in the code to change it (i only changed .com to .de).

You can remove .de if you want it’s just plain text, that was made with bootstrap classes for different portviews. But IE always has problems. Anyways kinda solved uh?

Ha ok, thx. The Problem now only occures on Win 7 with IE 11 … Win 10 + IE is not a problem and other browsers are fine as well. Thank you for your help!