diff --git a/_data/navigation.yml b/_data/navigation.yml
index 8a6397bb..058fafa3 100644
--- a/_data/navigation.yml
+++ b/_data/navigation.yml
@@ -23,7 +23,7 @@ main:
 docs:
   - title: Getting Started
     children:
-      - title: "Quick Start Guide"
+      - title: "Quick-Start Guide"
         path: quick-start-guide
       - title: "Installation"
         path: installation
diff --git a/_includes/nav_list.html b/_includes/nav_list
similarity index 68%
rename from _includes/nav_list.html
rename to _includes/nav_list
index f39e389c..cf881bbd 100644
--- a/_includes/nav_list.html
+++ b/_includes/nav_list
@@ -1,20 +1,20 @@
 {% include base_path %}
 {% assign navigation = site.data.navigation[page.sidebar.nav] %}
 
-<nav>
+<nav class="nav__list">
   <ul>
     {% for nav in navigation %}
-      <li>{{ nav.title }}
+      <li><span class="nav__sub-title">{{ nav.title }}</span>
         {% if nav.children != null %}
         <ul>
           {% for child in nav.children %}
             {% assign nav_url = child.path | prepend: "/" | prepend: page.sidebar.nav | prepend: "/" | append: "/" | prepend: base_path %}
             {% if nav_url contains page.url %}
-              {% assign c = "current" %}
+              {% assign active = "active" %}
             {% else %}
-              {% assign c = "" %}
+              {% assign active = "" %}
             {% endif %}
-            <li><a href="{{ nav_url }}" class="{{ c }}">{{ child.title }}</a></li>
+            <li><a href="{{ nav_url }}" class="{{ active }}">{{ child.title }}</a></li>
           {% endfor %}
         </ul>
         {% endif %}
diff --git a/_includes/sidebar.html b/_includes/sidebar.html
index 9949c74d..34995c93 100644
--- a/_includes/sidebar.html
+++ b/_includes/sidebar.html
@@ -16,7 +16,7 @@
       {% if s.text %}{{ s.text | markdownify }}{% endif %}
     {% endfor %}
     {% if page.sidebar.nav %}
-      {% include nav_list.html items=page.sidebar.nav %}
+      {% include nav_list items=page.sidebar.nav %}
     {% endif %}
   {% endif %}
   </div>
diff --git a/_includes/toc b/_includes/toc
index e784b52e..6814ccf2 100644
--- a/_includes/toc
+++ b/_includes/toc
@@ -1,6 +1,6 @@
 <aside class="sidebar__right">
 <nav class="toc" markdown="1">
-<header><h4 class="toc__title"><i class="fa fa-{{ include.icon | default: 'book' }}"></i> {{ include.title | default: site.data.ui-text[site.locale].toc_label }}</h4></header>
+<header><h4 class="nav__title"><i class="fa fa-{{ include.icon | default: 'book' }}"></i> {{ include.title | default: site.data.ui-text[site.locale].toc_label }}</h4></header>
 *  Auto generated table of contents
 {:toc .toc__menu}
 </nav>
diff --git a/assets/_scss/_navigation.scss b/assets/_scss/_navigation.scss
index 2618d43e..bab71d41 100644
--- a/assets/_scss/_navigation.scss
+++ b/assets/_scss/_navigation.scss
@@ -212,4 +212,93 @@
       }
     }
   }
+}
+
+
+/*
+   Navigation list
+   ========================================================================== */
+
+.nav__list {
+  a {
+    display: block;
+    padding: 2px 0;
+
+    &:hover {
+      text-decoration: underline;
+    }
+  }
+
+  .active {
+    color: $primary-color;
+    font-weight: bold;
+  }
+}
+
+.nav__title {
+  margin: 0;
+  padding: 10px 20px;
+  font-family: $sans-serif-narrow;
+  font-size: 16px;
+  font-weight: bold;
+  border-bottom: 1px solid $border-color;
+}
+
+.nav__sub-title {
+  display: block;
+  margin: 10px 0;
+  padding: 10px 0;
+  font-family: $sans-serif-narrow;
+  font-size: 14px;
+  font-weight: bold;
+  border-bottom: 1px solid $border-color;
+}
+
+
+/*
+   Table of contents navigation
+   ========================================================================== */
+
+.toc {
+  padding: 0 0 1em;
+  font-family: $sans-serif-narrow;
+  color: $gray;
+  text-transform: uppercase;
+  letter-spacing: 1px;
+  background-color: #fff;
+}
+
+.toc__menu {
+  margin: 0;
+  padding: 0;
+  width: 100%;
+  list-style: none;
+
+  a {
+    display: block;
+    padding: 10px 20px;
+    color: $gray;
+    font-size: 11px;
+    font-weight: bold;
+    line-height: 1.5;
+    border-bottom: 1px solid $border-color;
+
+    &:hover {
+      color: #000;
+      background: $lighter-gray;
+    }
+  }
+
+  li ul > li a {
+    font-weight: normal;
+  }
+
+  // hide sub sub links on small screens
+  li > ul li {
+    display: none;
+
+    @include breakpoint($medium) {
+      display: block;
+    }
+  }
 }
\ No newline at end of file
diff --git a/assets/_scss/_toc.scss b/assets/_scss/_toc.scss
deleted file mode 100644
index 2d1f26bd..00000000
--- a/assets/_scss/_toc.scss
+++ /dev/null
@@ -1,55 +0,0 @@
-/* ==========================================================================
-   TABLE OF CONTENTS
-   ========================================================================== */
-
-.toc {
-  padding: 0 0 1em;
-  font-family: $sans-serif-narrow;
-  color: $gray;
-  text-transform: uppercase;
-  letter-spacing: 1px;
-  background-color: #fff;
-}
-
-.toc__title {
-  margin: 0;
-  padding: 10px 20px;
-  font-family: $sans-serif-narrow;
-  font-size: 16px;
-  border-bottom: 1px solid $border-color;
-}
-
-.toc__menu {
-  margin: 0;
-  padding: 0;
-  width: 100%;
-  list-style: none;
-
-  a {
-    display: block;
-    padding: 10px 20px;
-    color: $gray;
-    font-size: 11px;
-    font-weight: bold;
-    line-height: 1.5;
-    border-bottom: 1px solid $border-color;
-
-    &:hover {
-      color: #000;
-      background: $lighter-gray;
-    }
-  }
-
-  li ul > li a {
-    font-weight: normal;
-  }
-
-  // hide sub sub links on small screens
-  li > ul li {
-    display: none;
-
-    @include breakpoint($medium) {
-      display: block;
-    }
-  }
-}
diff --git a/assets/_scss/main.scss b/assets/_scss/main.scss
index c18f0f0b..0c426eaf 100644
--- a/assets/_scss/main.scss
+++ b/assets/_scss/main.scss
@@ -21,7 +21,6 @@
 @import "notices";
 @import "masthead";
 @import "navigation";
-@import "toc"; // table of contents
 @import "footer";
 @import "syntax";
 
diff --git a/assets/css/main.css b/assets/css/main.css
index b5269a01..a8a9b959 100644
--- a/assets/css/main.css
+++ b/assets/css/main.css
@@ -1,4 +1,4 @@
-a:focus{outline:thin dotted #dd8338;outline:5px auto #dd8338;outline-offset:-2px}*,*:before,*:after{box-sizing:border-box}html{box-sizing:border-box;background-color:#fff;font-size:15px;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%}@media (min-width: 48em){html{font-size:16px}}@media (min-width: 64em){html{font-size:18px}}body{margin:0}::-moz-selection{color:#fff;background:#000}::selection{color:#fff;background:#000}article,aside,details,figcaption,figure,footer,header,hgroup,main,nav,section{display:block}audio,canvas,video{display:inline-block;*display:inline;*zoom:1}audio:not([controls]){display:none}a{color:inherit}a:hover,a:active{outline:0}sub,sup{position:relative;font-size:75%;line-height:0;vertical-align:baseline}sup{top:-0.5em}sub{bottom:-0.25em}img{max-width:100%;width:auto\9;height:auto;vertical-align:middle;border:0;-ms-interpolation-mode:bicubic}#map_canvas img,.google-maps img{max-width:none}button,input,select,textarea{margin:0;font-size:100%;vertical-align:middle}button,input{*overflow:visible;line-height:normal}button::-moz-focus-inner,input::-moz-focus-inner{padding:0;border:0}button,html input[type="button"],input[type="reset"],input[type="submit"]{-webkit-appearance:button;cursor:pointer}label,select,button,input[type="button"],input[type="reset"],input[type="submit"],input[type="radio"],input[type="checkbox"]{cursor:pointer}input[type="search"]{box-sizing:content-box;-webkit-appearance:textfield}input[type="search"]::-webkit-search-decoration,input[type="search"]::-webkit-search-cancel-button{-webkit-appearance:none}textarea{overflow:auto;vertical-align:top}body{margin:0;padding:0;color:#333332;font-family:Georgia,Times,serif;line-height:1.5;background-color:#fff}body.overflow--hidden{overflow:hidden}h1,h2,h3,h4,h5,h6{line-height:1.25;font-family:-apple-system,".SFNSText-Regular","San Francisco","Roboto","Segoe UI","Helvetica Neue","Lucida 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span,.screen-reader-shortcut{position:absolute !important;clip:rect(1px, 1px, 1px, 1px);height:1px !important;width:1px !important;border:0 !important;overflow:hidden}body:hover .visually-hidden a,body:hover .visually-hidden input,body:hover .visually-hidden button{display:none !important}.screen-reader-text:focus,.screen-reader-shortcut:focus{clip:auto !important;height:auto !important;width:auto !important;display:block;font-size:1em;font-weight:bold;padding:15px 23px 14px;background:#fff;z-index:100000;text-decoration:none;box-shadow:0 0 2px 2px rgba(0,0,0,0.6)}.skip-link{position:fixed;z-index:20;margin:0;font-family:-apple-system,".SFNSText-Regular","San Francisco","Roboto","Segoe UI","Helvetica Neue","Lucida Grande",Arial,sans-serif;white-space:nowrap}.skip-link li{height:0;width:0;list-style:none}.center{text-align:center}.cf{clear:both}.wrapper{max-width:1024px;margin-left:auto;margin-right:auto}.wrapper:after{content:" ";display:block;clear:both}.align-left{display:block;margin-left:auto;margin-right:auto}@media (min-width: 37.5em){.align-left{float:left;margin-right:1em}}.align-right{display:block;margin-left:auto;margin-right:auto}@media (min-width: 37.5em){.align-right{float:right;margin-left:1em}}@media (min-width: 64em){.full{margin-right:-300px}}.icon{display:inline-block;fill:currentColor;width:1em;height:1.1em;line-height:1;position:relative;top:-0.1em;vertical-align:middle}.social-icons .fa-behance,.social-icons .fa-behance-square{color:#1769FF}.social-icons .fa-dribbble{color:#ea4c89}.social-icons .fa-facebook,.social-icons .fa-facebook-square{color:#3b5998}.social-icons .fa-twitter,.social-icons .fa-twitter-square{color:#55acee}.social-icons .fa-flickr{color:#ff0084}.social-icons .fa-foursquare{color:#0072b1}.social-icons .fa-github,.social-icons .fa-github-alt,.social-icons .fa-github-square{color:#171516}.social-icons .fa-google-plus,.social-icons .fa-google-plus-square{color:#dd4b39}.social-icons .fa-instagram{color:#517fa4}.social-icons .fa-lastfm,.social-icons .fa-lastfm-square{color:#d51007}.social-icons .fa-linkedin,.social-icons .fa-linkedin-square{color:#007bb6}.social-icons .fa-pinterest,.social-icons .fa-pinterest-p,.social-icons .fa-pinterest-square{color:#cb2027}.social-icons .fa-rss,.social-icons .fa-rss-square{color:#fa9b39}.social-icons .fa-soundcloud{color:#f30}.social-icons .fa-stack-exchange,.social-icons .fa-stack-overflow{color:#fe7a15}.social-icons .fa-tumblr,.social-icons .fa-tumblr-square{color:#32506d}.social-icons .fa-twitter,.social-icons .fa-twitter-square{color:#55acee}.social-icons .fa-vimeo,.social-icons .fa-vimeo-square{color:#1ab7ea}.social-icons .fa-vine{color:#00bf8f}.social-icons .fa-youtube,.social-icons .fa-youtube-square,.social-icons .fa-youtube-play{color:#b00}.social-icons .fa-xing,.social-icons .fa-xing-square{color:#006567}.navicon{position:relative;width:32px;height:4px;background:#fff;margin:auto;transition:0.3s}.navicon:before,.navicon:after{content:"";position:absolute;left:0;width:32px;height:4px;background:#fff;transition:0.3s}.navicon:before{top:-8px}.navicon:after{bottom:-8px}.close .navicon{background:transparent}.close .navicon:before,.close .navicon:after{-webkit-transform-origin:50% 50%;transform-origin:50% 50%;top:0;width:32px}.close .navicon:before{-webkit-transform:rotate3d(0, 0, 1, 45deg);transform:rotate3d(0, 0, 1, 45deg)}.close .navicon:after{-webkit-transform:rotate3d(0, 0, 1, -45deg);transform:rotate3d(0, 0, 1, -45deg)}@media (min-width: 48em){.sticky{clear:both;position:-webkit-sticky;position:sticky;top:3em}.sticky::after{clear:both;content:"";display:table}.sticky>*{display:block}}.well{min-height:20px;padding:19px;margin-bottom:20px;background-color:#f5f5f5;border:1px solid #e3e3e3;border-radius:4px;box-shadow:inset 0 1px 1px 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