diff --git a/app/assets/stylesheets/common.scss b/app/assets/stylesheets/common.scss
index 8ab10773b..8d3da8f7e 100644
--- a/app/assets/stylesheets/common.scss
+++ b/app/assets/stylesheets/common.scss
@@ -359,14 +359,6 @@ body.compact-nav {
       width: 100%;
     }
 
-    h2 {
-      font-size: 1.5rem;
-    }
-
-    h3, h4 {
-      font-size: 1.25rem;
-    }
-
     .close-wrap {
       cursor: pointer;
       position: absolute;
@@ -1459,13 +1451,11 @@ dl.dl-inline {
 .richtext,
 .prose {
   code {
-    font-size: 13px;
     background: $lightgrey;
     padding: 2px 3px;
   }
 
   pre {
-    font-size: 13px;
     background: $lightgrey;
     padding: 2px 3px;
     white-space: pre-wrap;
@@ -1508,19 +1498,10 @@ dl.dl-inline {
 
 /* Rules for the "Welcome" page */
 .site-welcome, .site-fixthemap {
-  .center {
-    text-align: center;
-    .sprite {
-      float: none;
-      margin: auto;
-    }
-  }
-
   .sprite {
     background-image: image-url("welcome-sprite.png");
     background-size: 500px 250px;
     display: block;
-    float: left;
   }
 
   .icon-list {
@@ -1570,15 +1551,6 @@ dl.dl-inline {
     /* no-r2 */ background-position: -350px 0;
   }
 
-  .start-mapping {
-    margin: auto;
-    cursor: pointer;
-    border: none;
-    padding: 20px 40px;
-    font-size: 30px;
-    text-decoration: none;
-  }
-
   .icon.note {
     background-color: #333;
     border-radius: 4px;
diff --git a/app/views/site/about.html.erb b/app/views/site/about.html.erb
index 3753dcc8d..b4b21a567 100644
--- a/app/views/site/about.html.erb
+++ b/app/views/site/about.html.erb
@@ -8,14 +8,14 @@
     </div>
     <div class='row'>
       <div class="w-100 px-5 py-4 bg-dark">
-        <h1 class="text-white font-weight-light"><%= t ".used_by_html", :name => tag.span("OpenStreetMap", :class => "user-name"), :locale => @locale %></h1>
+        <h1 class="text-white fw-light"><%= t ".used_by_html", :name => tag.span("OpenStreetMap", :class => "user-name"), :locale => @locale %></h1>
       </div>
     </div>
   </div>
 
   <div class='bg-white px-5 py-4'>
     <div class='section'>
-      <p><strong><%= t ".lede_text", :locale => @locale %></strong></p>
+      <p class="lead"><%= t ".lede_text", :locale => @locale %></p>
       <h2><div class='icon local'></div><%= t ".local_knowledge_title", :locale => @locale %></h2>
       <p><%= t ".local_knowledge_html", :locale => @locale %></p>
     </div>
diff --git a/app/views/site/fixthemap.html.erb b/app/views/site/fixthemap.html.erb
index f5adb83ac..70118b980 100644
--- a/app/views/site/fixthemap.html.erb
+++ b/app/views/site/fixthemap.html.erb
@@ -6,31 +6,29 @@
   <h1><%= t ".title" %></h1>
 <% end %>
 
-<h3><%= t "layouts.intro_header" %></h3>
-<p><%= t "layouts.intro_text" %></p>
+<h2><%= t "layouts.intro_header" %></h2>
+<p class="lead"><%= t "layouts.intro_text" %></p>
 
-<h3><%= t ".how_to_help.title" %></h3>
+<h2><%= t ".how_to_help.title" %></h2>
 
-<div class='container'>
-  <div class='row'>
-    <div class='col-sm'>
-      <h5><%= t ".how_to_help.join_the_community.title" %></h5>
-      <p><%= t ".how_to_help.join_the_community.explanation_html" %></p>
-      <p class='text-center'>
-        <a class="btn btn-primary" href="<%= user_new_path %>"><%= t("layouts.start_mapping") %></a>
-      </p>
-    </div>
-    <div class='col-sm'>
-      <h5><%= t "site.welcome.add_a_note.title" %></h5>
-      <p><%= t "site.welcome.add_a_note.paragraph_1_html" %></p>
-      <p><%= t ".how_to_help.add_a_note.instructions_html", :map_url => root_path %></p>
-    </div>
+<div class='row'>
+  <div class='col-sm'>
+    <h5><%= t ".how_to_help.join_the_community.title" %></h5>
+    <p><%= t ".how_to_help.join_the_community.explanation_html" %></p>
+    <p class='text-center'>
+      <a class="btn btn-primary" href="<%= user_new_path %>"><%= t("layouts.start_mapping") %></a>
+    </p>
+  </div>
+  <div class='col-sm'>
+    <h5><%= t "site.welcome.add_a_note.title" %></h5>
+    <p><%= t "site.welcome.add_a_note.paragraph_1_html" %></p>
+    <p><%= t ".how_to_help.add_a_note.instructions_html", :map_url => root_path %></p>
   </div>
 </div>
 
-<h3><%= t ".other_concerns.title" %></h3>
+<h2><%= t ".other_concerns.title" %></h2>
 <p><%= t ".other_concerns.explanation_html" %></p>
 
-<h3><%= t "site.welcome.questions.title" %></h3>
-<span class='sprite small term question'></span>
+<h2><%= t "site.welcome.questions.title" %></h2>
+<span class='sprite small term question float-start'></span>
 <p><%= t "site.welcome.questions.paragraph_1_html", :help_url => help_path %></p>
diff --git a/app/views/site/welcome.html.erb b/app/views/site/welcome.html.erb
index 4617935e7..7c1ee38ab 100644
--- a/app/views/site/welcome.html.erb
+++ b/app/views/site/welcome.html.erb
@@ -6,66 +6,66 @@
   <h1><%= t ".title" %></h1>
 <% end %>
 
-<p><%= t ".introduction_html" %></p>
+<p class="lead"><%= t ".introduction_html" %></p>
 
-<h3><%= t ".whats_on_the_map.title" %></h3>
+<h2><%= t ".whats_on_the_map.title" %></h2>
 
 <div class='row'>
   <div class='col'>
-    <div class='center'>
-      <span class='sprite small check'></span>
+    <div>
+      <span class='sprite small check mx-auto'></span>
     </div>
     <p><%= t ".whats_on_the_map.on_html" %></p>
   </div>
   <div class='col'>
     <div class='center'>
-      <span class='sprite small x'></span>
+      <span class='sprite small x mx-auto'></span>
     </div>
     <p><%= t ".whats_on_the_map.off_html" %></p>
   </div>
 </div>
 
-<h3><%= t ".basic_terms.title" %></h3>
+<h2><%= t ".basic_terms.title" %></h2>
 
 <p><%= t ".basic_terms.paragraph_1_html" %></p>
 
-<div class='clearfix icon-list'>
+<div class='clearfix'>
   <div class='clearfix'>
-    <span class='sprite small term editor'></span>
+    <span class='sprite small term editor float-start'></span>
     <p><%= t ".basic_terms.editor_html" %></p>
   </div>
   <div class='clearfix'>
-    <span class='sprite small term node'></span>
+    <span class='sprite small term node float-start'></span>
     <p><%= t ".basic_terms.node_html" %></p>
   </div>
   <div class='clearfix'>
-    <span class='sprite small term way'></span>
+    <span class='sprite small term way float-start'></span>
     <p><%= t ".basic_terms.way_html" %></p>
   </div>
   <div class='clearfix'>
-    <span class='sprite small term tag'></span>
+    <span class='sprite small term tag float-start'></span>
     <p><%= t ".basic_terms.tag_html" %></p>
   </div>
 </div>
 
-<div class='clearfix icon-list'>
-  <h3><%= t ".rules.title" %></h3>
-  <span class='sprite small term rules'></span>
+<div class='clearfix'>
+  <h2><%= t ".rules.title" %></h2>
+  <span class='sprite small term rules float-start'></span>
   <p><%= t ".rules.paragraph_1_html" %></p>
 </div>
 
-<div class='clearfix icon-list'>
-  <h3><%= t ".questions.title" %></h3>
-  <span class='sprite small term question'></span>
+<div class='clearfix'>
+  <h2><%= t ".questions.title" %></h2>
+  <span class='sprite small term question float-start'></span>
   <p><%= t ".questions.paragraph_1_html", :help_url => help_path %></p>
 </div>
 
-<div class='clearfix center'>
-  <p><a href="<%= edit_path %>" class="button start-mapping"><%= t ".start_mapping" %></a></p>
+<div class='clearfix text-center'>
+  <p class="display-5"><a href="<%= edit_path %>" class="button start-mapping"><%= t ".start_mapping" %></a></p>
 </div>
 
 <div class='alert alert-primary'>
-  <h3><%= t ".add_a_note.title" %></h3>
+  <h2><%= t ".add_a_note.title" %></h2>
   <p><%= t ".add_a_note.paragraph_1_html" %></p>
   <p><%= t ".add_a_note.paragraph_2_html", :map_url => root_path %></p>
 </div>
diff --git a/app/views/traces/show.html.erb b/app/views/traces/show.html.erb
index e72c423d7..69f58b5b8 100644
--- a/app/views/traces/show.html.erb
+++ b/app/views/traces/show.html.erb
@@ -12,19 +12,19 @@
 
 <table class="table table-borderless table-sm">
   <tr>
-    <td><%= t ".filename" %></td>
+    <th><%= t ".filename" %></th>
     <td><%= @trace.name %> (<%= link_to t(".download"), trace_data_path(@trace) %>)</td>
   </tr>
   <tr>
-    <td><%= t ".uploaded" %></td>
+    <th><%= t ".uploaded" %></th>
     <td><%= l @trace.timestamp, :format => :friendly %></td>
   </tr>
   <% if @trace.inserted? %>
   <tr>
-    <td><%= t ".points" %></td>
+    <th><%= t ".points" %></th>
     <td><%= number_with_delimiter(@trace.size) %></td></tr>
   <tr>
-    <td><%= t ".start_coordinates" %></td>
+    <th><%= t ".start_coordinates" %></th>
     <td>
       <div class="d-inline">
         <%= t ".coordinates_html",
@@ -35,15 +35,15 @@
   </tr>
   <% end %>
   <tr>
-    <td><%= t ".owner" %></td>
+    <th><%= t ".owner" %></th>
     <td><%= link_to @trace.user.display_name, user_path(@trace.user) %></td>
   </tr>
   <tr>
-    <td><%= t ".description" %></td>
+    <th><%= t ".description" %></th>
     <td><%= @trace.description %></td>
   </tr>
   <tr>
-    <td><%= t ".tags" %></td>
+    <th><%= t ".tags" %></th>
     <td>
     <% unless @trace.tags.empty? %>
       <%= safe_join(@trace.tags.collect { |tag| link_to tag.tag, :controller => "traces", :action => "index", :tag => tag.tag, :id => nil }, ", ") %>
@@ -53,13 +53,11 @@
     </td>
   </tr>
   <tr>
-    <td><%= t ".visibility" %></td>
+    <th><%= t ".visibility" %></th>
     <td><%= t "traces.visibility.#{@trace.visibility}" %></td>
   </tr>
 </table>
 
-<br /><br />
-
 <% if current_user && (current_user==@trace.user || current_user.administrator? || current_user.moderator?) %>
   <div>
     <% if current_user == @trace.user %>