JSFiddle - React, Tailwind, and code Playground

HTML

<div id="header">
            <div class="content">     
                <div id="wrapper">
            <div id="sidebar-left">
                <div class="content">
                    <h3>Sidebar</h3>
                    <p>Das ist die linke Sidebar.</p>
                </div> 
            </div><!-- sidebar-left -->

            <div id="center">
                <div class="content">
                    <h3>Post</h3>
                    <p>Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.</p>
                </div> 
            </div> <!-- end center -->


            <div id="sidebar-right">
                <div class="content">
                    <h3>Sidebar</h3>
                    <p>Die rechte Sidebar ist etwas länger als die rechte Sidebar und soll die gleiche Höhe bekommen wie die längste der drei Kolumnen.</p>
                </div> 
            </div> <!-- sidebar-right -->

     </div><!-- end #wrapper -->
                <h1>Header</h1>
                <p></p>
            </div>
        </div> <!-- end header -->

   

        <div id="footer">
            <div class="content">
                
                    <h3>Footer</h3>
                    <p></p>
                
            </div>
        </div> <!-- end footer -->

CSS

#header {background:rgb(177, 182, 90);}
#sidebar-left{float:left; width:20%; background:rgb(210, 210, 210);}
#center{float:left; width:60%; background:rgb(232, 232, 232);}
#sidebar-right {float:right; width:20%; background:rgb(210, 210, 210);}
#sidebar-left, #center, #sidebar-right {padding-bottom:32000px; margin-bottom:-32000px;}
#wrapper {overflow:hidden; background:rgb(232, 232, 232);}
#footer {clear:both; background:rgb(177, 182, 90);}
h1 {font-size:20px; margin:0; padding:10px 0; color:#fff; text-align: center}
h3 {font-size:18px; margin:0; padding:8px 0; text-align: center}
.content {padding:10px;}
p {font-size:12px; line-height:1.5em; margin:0; padding:5px 0;}
#footer p,
#header p {color:#fff; text-align: center}