diff --git a/assets/css/style.css b/assets/css/style.css
index 06c203a..c81befb 100644
--- a/assets/css/style.css
+++ b/assets/css/style.css
@@ -175,14 +175,14 @@ opacity:0.8;
 article{width:695px; float:left; margin-left:20px; padding:0px; }
 article.full{}
 
-section-head { margin-bottom:20px; display:inline-block; width:100%; border-radius:8px; padding:0px; text-align: center; }
-section-area { margin-bottom:20px; display:inline-block; width:100%; border-radius:8px; padding:0px; text-align: center; border: 1px solid light-dark(#f9d72c, #333); background:light-dark(#e5f1d3, #1b1b1b); }
-section-area h1 { padding: 8px 20px 8px 20px; }
-section-area p { padding: 8px 20px 8px 20px; }
-section-area.snow { color: rgba(249, 215, 44, 1); background:#444; }
-section-area.snow a { color: #e5f1d3; }
-section-area.warning { color: rgba(249, 215, 44, 1); background:#a00; }
-section-area.warning a { color: #e5f1d3; text-decoration:underline; }
+.section-head { margin-bottom:20px; display:inline-block; width:100%; border-radius:8px; padding:0px; text-align: center; }
+.section-area { margin-bottom:20px; display:inline-block; width:100%; border-radius:8px; padding:0px; text-align: center; border: 1px solid light-dark(#f9d72c, #333); background:light-dark(#e5f1d3, #1b1b1b); }
+.section-area h1 { padding: 8px 20px 8px 20px; }
+.section-area p { padding: 8px 20px 8px 20px; }
+.section-area.snow { color: rgba(249, 215, 44, 1); background:#444; }
+.section-area.snow a { color: #e5f1d3; }
+.section-area.warning { color: rgba(249, 215, 44, 1); background:#a00; }
+.section-area.warning a { color: #e5f1d3; text-decoration:underline; }
 #snow { position: relative; }
 
 section {margin-bottom:20px; background:light-dark(#fff, #1b1b1b); border-radius:8px; border:1px solid light-dark(#ddd, #333); padding:10px 20px 20px 20px;}
diff --git a/community.html b/community.html
index 1bc9581..ec0a91d 100644
--- a/community.html
+++ b/community.html
@@ -86,7 +86,7 @@ <h1>Community</h1>
 
 	<article>
 
-    <section-head>
+    <section class="section-head">
       <div class="link-grid">
         <div class="link-button">
           <h1><a href="https://web.libera.chat/?channel=#openscad">Discussion</a></h1>
@@ -101,7 +101,7 @@ <h1><a href="https://github.com/openscad/openscad/issues">Bug reports</a></h1>
           <small>Report bugs and request features on github</small>
         </div>
         </div>
-    </section-head>
+    </section>
 
     <section id="get-involved">
 			<h1>Get Involved</h1>
diff --git a/documentation-articles.html b/documentation-articles.html
index 047348d..55f1993 100644
--- a/documentation-articles.html
+++ b/documentation-articles.html
@@ -96,7 +96,7 @@ <h1><a href="documentation-articles.html">Articles / Blogs</a></h1>
   </div>
 
   <article>
-    <section-head>
+    <section class="section-head">
       <div class="link-grid">
         <div class="link-button">
           <a href="documentation.html"><i class="fas fa-scroll"></i></a>
@@ -115,7 +115,7 @@ <h1><a href="documentation-videos.html">Videos</a></h1>
           <h1><a href="documentation-articles.html">Articles / Blogs</a></h1>
         </div>
       </div>
-    </section-head>
+    </section>
 
     <section id="tutorials-blogs">
       <h1>Articles / Blogs</h1>
diff --git a/documentation-books.html b/documentation-books.html
index aa571a8..49c5b13 100644
--- a/documentation-books.html
+++ b/documentation-books.html
@@ -100,7 +100,7 @@ <h1><a href="documentation-articles.html">Articles / Blogs</a></h1>
   </div>
 
   <article>
-    <section-head>
+    <section class="section-head">
       <div class="link-grid">
         <div class="link-button">
           <a href="documentation.html"><i class="fas fa-scroll"></i></a>
@@ -119,9 +119,9 @@ <h1><a href="documentation-videos.html">Videos</a></h1>
           <h1><a href="documentation-articles.html">Articles / Blogs</a></h1>
         </div>
       </div>
-    </section-head>
+    </section>
 
-    <section-head>
+    <section class="section-head">
       <div class="link-grid">
         <div class="link-button">
           <a href="documentation-books.html#books-english">
@@ -156,7 +156,7 @@ <h1><a href="documentation-articles.html">Articles / Blogs</a></h1>
           </a>
         </div>
       </div>
-    </section-head>
+    </section>
     <!--
       -- English
       -->
diff --git a/documentation-videos.html b/documentation-videos.html
index a4a836b..d0bbd54 100644
--- a/documentation-videos.html
+++ b/documentation-videos.html
@@ -97,7 +97,7 @@ <h1><a href="documentation-articles.html">Articles / Blogs</a></h1>
   </div>
 
   <article>
-    <section-head>
+    <section class="section-head">
       <div class="link-grid">
         <div class="link-button">
           <a href="documentation.html"><i class="fas fa-scroll"></i></a>
@@ -116,7 +116,7 @@ <h1><a href="documentation-videos.html">Videos</a></h1>
           <h1><a href="documentation-articles.html">Articles / Blogs</a></h1>
         </div>
       </div>
-    </section-head>
+    </section>
 
     <section id="tutorials-video">
       <h1>Videos</h1>
diff --git a/documentation.html b/documentation.html
index 728a62e..d7382f9 100644
--- a/documentation.html
+++ b/documentation.html
@@ -96,7 +96,7 @@ <h1><a href="documentation-articles.html">Articles / Blogs</a></h1>
   </div>
 
   <article>
-    <section-head>
+    <section class="section-head">
       <div class="link-grid">
         <div class="link-button">
           <a href="documentation.html"><i class="fas fa-scroll selected"></i></a>
@@ -115,7 +115,7 @@ <h1><a href="documentation-videos.html">Videos</a></h1>
           <h1><a href="documentation-articles.html">Articles / Blogs</a></h1>
         </div>
       </div>
-    </section-head>
+    </section>
 
     <section id="tutorial">
       <h1><a href="https://en.wikibooks.org/wiki/OpenSCAD_Tutorial">OpenSCAD Tutorial</a></h1>
diff --git a/downloads.html b/downloads.html
index 4c423f9..c6644f6 100644
--- a/downloads.html
+++ b/downloads.html
@@ -122,7 +122,7 @@ <h1>Downloads</h1>
 
 	<article>
 
-    <section-head>
+    <section class="section-head">
       <div class="link-grid">
         <div class="link-button">
           <a href="#osx"><i class="fas fa-box-open selected"></i></a>
@@ -135,7 +135,7 @@ <h1><a href="#snapshots">Nightly Builds</a></h1>
           <p><small>Try the nightly builds with all the new features and improvements. Enable the new Manifold geometry engine in Preferences for a huge performance boost.</small></p>
         </div>
       </div>
-    </section-head>
+    </section>
 
 		<section id="osx">
 			<h1>macOS</h1>
diff --git a/index.html b/index.html
index 705ca85..bd6d591 100644
--- a/index.html
+++ b/index.html
@@ -123,7 +123,7 @@ <h1>Recent News</h1>
 	</div>
 
   <article>
-    <section-area id="ticker">
+    <section id="ticker" class="section-area">
       <div class="ticker-wrap">
         <div class="ticker-move ticker-animation">
           <div class="ticker-item"><div class="ticker-content">OpenSCAD Discussion, talk with Humans: <a target="_blank" href="https://web.libera.chat/?channel=#openscad">#openscad</a> (on IRC network <a target="_blank" href="https://libera.chat/">libera.chat</a>)</div></div>
@@ -139,7 +139,7 @@ <h1>Recent News</h1>
           <div class="ticker-item"><div class="ticker-content">OpenSCAD Discussion, talk with Humans: <a target="_blank" href="https://web.libera.chat/?channel=#openscad">#openscad</a> (on IRC network <a target="_blank" href="https://libera.chat/">libera.chat</a>)</div></div>
         </div>
       </div>
-    </section-area>
+    </section>
 
     <section>
 			<h1><strong><span class="green">Open</span>SCAD</strong> is software for creating solid 3D CAD objects.</h1>
@@ -161,7 +161,7 @@ <h4 style="position:absolute; left:135px; bottom:35px;"><a href="downloads.html"
       </div>
     </section>
 
-    <section-head>
+    <section class="section-head">
       <div class="link-grid">
         <div class="link-button">
           <a href="documentation.html#tutorial"><i class="fas fa-scroll"></i></a>
@@ -184,7 +184,7 @@ <h1><a href="cheatsheet/index.html" target="_blank">Cheat Sheet</a></h1>
           <small>Overview of modules and functions</small>
         </div>
       </div>
-    </section-head>
+    </section>
 
   </article>