diff --git a/dev/scss/main/alertify.scss b/dev/scss/main/alertify.scss
index 0eb3194..df1225c 100644
--- a/dev/scss/main/alertify.scss
+++ b/dev/scss/main/alertify.scss
@@ -1,4 +1,6 @@
 @import "../util";
+@import "alertify/alertify-core";
+@import "alertify/alertify-default";
 
 /*
 article.alertify-log {
diff --git a/dev/scss/main/alertify/.sass-cache/600d657f6ac2358f30ba6bc0ab4cd7ffb6194ced/flymake84934ky.rbc b/dev/scss/main/alertify/.sass-cache/600d657f6ac2358f30ba6bc0ab4cd7ffb6194ced/flymake84934ky.rbc
new file mode 100644
index 0000000..27909e1
--- /dev/null
+++ b/dev/scss/main/alertify/.sass-cache/600d657f6ac2358f30ba6bc0ab4cd7ffb6194ced/flymake84934ky.rbc
Binary files differ
diff --git a/dev/scss/main/alertify/.sass-cache/600d657f6ac2358f30ba6bc0ab4cd7ffb6194ced/flymake8493ras.rbc b/dev/scss/main/alertify/.sass-cache/600d657f6ac2358f30ba6bc0ab4cd7ffb6194ced/flymake8493ras.rbc
new file mode 100644
index 0000000..773e743
--- /dev/null
+++ b/dev/scss/main/alertify/.sass-cache/600d657f6ac2358f30ba6bc0ab4cd7ffb6194ced/flymake8493ras.rbc
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diff --git a/dev/scss/main/alertify/alertify-core.scss b/dev/scss/main/alertify/alertify-core.scss
new file mode 100644
index 0000000..5978b4f
--- /dev/null
+++ b/dev/scss/main/alertify/alertify-core.scss
@@ -0,0 +1,137 @@
+.alertify,
+.alertify-show,
+.alertify-log {
+  -webkit-transition: all 500ms cubic-bezier(0.175, 0.885, 0.320, 1.275);
+  -moz-transition: all 500ms cubic-bezier(0.175, 0.885, 0.320, 1.275);
+  -ms-transition: all 500ms cubic-bezier(0.175, 0.885, 0.320, 1.275);
+  -o-transition: all 500ms cubic-bezier(0.175, 0.885, 0.320, 1.275);
+  transition: all 500ms cubic-bezier(0.175, 0.885, 0.320, 1.275); /* easeOutBack */
+}
+.alertify-hide {
+  -webkit-transition: all 250ms cubic-bezier(0.600, -0.280, 0.735, 0.045);
+  -moz-transition: all 250ms cubic-bezier(0.600, -0.280, 0.735, 0.045);
+  -ms-transition: all 250ms cubic-bezier(0.600, -0.280, 0.735, 0.045);
+  -o-transition: all 250ms cubic-bezier(0.600, -0.280, 0.735, 0.045);
+  transition: all 250ms cubic-bezier(0.600, -0.280, 0.735, 0.045); /* easeInBack */
+}
+.alertify-log-hide {
+  -webkit-transition: all 500ms cubic-bezier(0.600, -0.280, 0.735, 0.045);
+  -moz-transition: all 500ms cubic-bezier(0.600, -0.280, 0.735, 0.045);
+  -ms-transition: all 500ms cubic-bezier(0.600, -0.280, 0.735, 0.045);
+  -o-transition: all 500ms cubic-bezier(0.600, -0.280, 0.735, 0.045);
+  transition: all 500ms cubic-bezier(0.600, -0.280, 0.735, 0.045); /* easeInBack */
+}
+.alertify-cover {
+  position: fixed; z-index: 99999;
+  top: 0; right: 0; bottom: 0; left: 0;
+  background-color:white;
+  filter:alpha(opacity=0);
+  opacity:0;
+}
+.alertify-cover-hidden {
+  display: none;
+}
+.alertify {
+  position: fixed; z-index: 99999;
+  top: 50px; left: 50%;
+  width: 550px;
+  margin-left: -275px;
+  opacity: 1;
+}
+.alertify-hidden {
+  -webkit-transform: translate(0,-150px);
+  -moz-transform: translate(0,-150px);
+  -ms-transform: translate(0,-150px);
+  -o-transform: translate(0,-150px);
+  transform: translate(0,-150px);
+  opacity: 0;
+  display: none;
+}
+/* overwrite display: none; for everything except IE6-8 */
+:root *> .alertify-hidden {
+  display: block;
+  visibility: hidden;
+}
+.alertify-logs {
+  position: fixed;
+  z-index: 5000;
+  bottom: 10px;
+  right: 10px;
+  width: 300px;
+}
+.alertify-logs-hidden {
+  display: none;
+}
+.alertify-log {
+  display: block;
+  margin-top: 10px;
+  position: relative;
+  right: -300px;
+  opacity: 0;
+}
+.alertify-log-show {
+  right: 0;
+  opacity: 1;
+}
+.alertify-log-hide {
+  -webkit-transform: translate(300px, 0);
+  -moz-transform: translate(300px, 0);
+  -ms-transform: translate(300px, 0);
+  -o-transform: translate(300px, 0);
+  transform: translate(300px, 0);
+  opacity: 0;
+}
+.alertify-dialog {
+  padding: 25px;
+}
+.alertify-resetFocus {
+  border: 0;
+  clip: rect(0 0 0 0);
+  height: 1px;
+  margin: -1px;
+  overflow: hidden;
+  padding: 0;
+  position: absolute;
+  width: 1px;
+}
+.alertify-inner {
+  text-align: center;
+}
+.alertify-text {
+  margin-bottom: 15px;
+  width: 100%;
+  -webkit-box-sizing: border-box;
+  -moz-box-sizing: border-box;
+  box-sizing: border-box;
+  font-size: 100%;
+}
+.alertify-buttons {
+}
+.alertify-button,
+.alertify-button:hover,
+.alertify-button:active,
+.alertify-button:visited {
+  background: none;
+  text-decoration: none;
+  border: none;
+  /* line-height and font-size for input button */
+  line-height: 1.5;
+  font-size: 100%;
+  display: inline-block;
+  cursor: pointer;
+  margin-left: 5px;
+}
+
+@media only screen and (max-width: 680px) {
+  .alertify,
+  .alertify-logs {
+    width: 90%;
+    -webkit-box-sizing: border-box;
+    -moz-box-sizing: border-box;
+    box-sizing: border-box;
+  }
+  .alertify {
+    left: 5%;
+    margin: 0;
+  }
+}
diff --git a/dev/scss/main/alertify/alertify-default.scss b/dev/scss/main/alertify/alertify-default.scss
new file mode 100644
index 0000000..00524cd
--- /dev/null
+++ b/dev/scss/main/alertify/alertify-default.scss
@@ -0,0 +1,81 @@
+/**
+ * Default Look and Feel
+ */
+.alertify,
+.alertify-log {
+  font-family: sans-serif;
+}
+.alertify {
+  background: #FFF;
+  border: 10px solid #333; /* browsers that don't support rgba */
+  border: 10px solid rgba(0,0,0,.7);
+  border-radius: 8px;
+  box-shadow: 0 3px 3px rgba(0,0,0,.3);
+  -webkit-background-clip: padding;     /* Safari 4? Chrome 6? */
+  -moz-background-clip: padding;     /* Firefox 3.6 */
+  background-clip: padding-box; /* Firefox 4, Safari 5, Opera 10, IE 9 */
+}
+.alertify-text {
+  border: 1px solid #CCC;
+  padding: 10px;
+  border-radius: 4px;
+}
+.alertify-button {
+  border-radius: 4px;
+  color: #FFF;
+  font-weight: bold;
+  padding: 6px 15px;
+  text-decoration: none;
+  text-shadow: 1px 1px 0 rgba(0,0,0,.5);
+  box-shadow: inset 0 1px 0 0 rgba(255,255,255,.5);
+  background-image: -webkit-linear-gradient(top, rgba(255,255,255,.3), rgba(255,255,255,0));
+  background-image:    -moz-linear-gradient(top, rgba(255,255,255,.3), rgba(255,255,255,0));
+  background-image:     -ms-linear-gradient(top, rgba(255,255,255,.3), rgba(255,255,255,0));
+  background-image:      -o-linear-gradient(top, rgba(255,255,255,.3), rgba(255,255,255,0));
+  background-image:         linear-gradient(top, rgba(255,255,255,.3), rgba(255,255,255,0));
+}
+.alertify-button:hover,
+.alertify-button:focus {
+  outline: none;
+  background-image: -webkit-linear-gradient(top, rgba(0,0,0,.1), rgba(0,0,0,0));
+  background-image:    -moz-linear-gradient(top, rgba(0,0,0,.1), rgba(0,0,0,0));
+  background-image:     -ms-linear-gradient(top, rgba(0,0,0,.1), rgba(0,0,0,0));
+  background-image:      -o-linear-gradient(top, rgba(0,0,0,.1), rgba(0,0,0,0));
+  background-image:         linear-gradient(top, rgba(0,0,0,.1), rgba(0,0,0,0));
+}
+.alertify-button:focus {
+  box-shadow: 0 0 15px #2B72D5;
+}
+.alertify-button:active {
+  position: relative;
+  box-shadow: inset 0 2px 4px rgba(0,0,0,.15), 0 1px 2px rgba(0,0,0,.05);
+}
+.alertify-button-cancel,
+.alertify-button-cancel:hover,
+.alertify-button-cancel:focus {
+  background-color: #FE1A00;
+  border: 1px solid #D83526;
+}
+.alertify-button-ok,
+.alertify-button-ok:hover,
+.alertify-button-ok:focus {
+  background-color: #5CB811;
+  border: 1px solid #3B7808;
+}
+
+.alertify-log {
+  background: #1F1F1F;
+  background: rgba(0,0,0,.9);
+  padding: 15px;
+  border-radius: 4px;
+  color: #FFF;
+  text-shadow: -1px -1px 0 rgba(0,0,0,.5);
+}
+.alertify-log-error {
+  background: #FE1A00;
+  background: rgba(254,26,0,.9);
+}
+.alertify-log-success {
+  background: #5CB811;
+  background: rgba(92,184,17,.9);
+}
\ No newline at end of file
diff --git a/dev/scss/main/main.scss b/dev/scss/main/main.scss
index ea569fa..9cadd4b 100644
--- a/dev/scss/main/main.scss
+++ b/dev/scss/main/main.scss
@@ -8,5 +8,74 @@
 @import "sidebar";    // Navigation on the left side
 @import "tutorial";   // Embedded and non-embedded tutorial
 @import "alertify";
-@import "alertify/alertify.core.css";
-@import "alertify/alertify.default.css";
+
+div.intro {
+  width: 70%;
+  min-width: 600px;
+}
+
+
+main {
+  margin: {
+    left: $standard-margin; 
+    right: $standard-margin; // Todo: -16px
+  }
+  padding-bottom: 20pt;
+  &.embedded {
+    margin: {
+      left: 14px;
+      right: 14px;
+    }
+  }
+  p {
+    text-align: justify;
+    hyphens: auto;
+  }
+
+/*
+  > section > p, > p {
+    a {
+      border-radius: 6px;
+      padding: 0 .3em;
+      background-color: $choose-bg;
+      text-shadow: light-shadow;
+      color: $light-green;
+      &:hover {
+        color: $dark-green;
+	text-shadow: none;
+	background-color: $light-green;
+      }
+    }
+  }
+*/
+}
+
+blockquote {
+  border-radius: $standard-border-radius;
+  padding: 2pt 5pt 2pt 20pt;
+  margin: 0;
+  border-left: 5px solid $ids-blue-1;
+  background-color: $ids-blue-2;
+  color: $ids-blue-1;
+}
+
+/*
+blockquote {
+  border-radius: 12px;
+  margin: 0;
+  text-indent: 0;
+  padding: 1em;
+  border-left: {
+    color: $dark-grey;
+    style: solid;
+    width: 1em;
+  }
+  background-color: $light-grey;
+  &.warning {
+    border-left-color: $dark-orange;
+  }
+  &.exception {
+    border-left-color: red;
+  }
+}
+*/
diff --git a/dev/scss/main/sidebar.scss b/dev/scss/main/sidebar.scss
index 7c74912..b454055 100644
--- a/dev/scss/main/sidebar.scss
+++ b/dev/scss/main/sidebar.scss
@@ -68,6 +68,20 @@
       > a {
 	padding: $item-padding;
       }
+
+      li.folded {
+	&.active ul {
+	  display: block;
+	}
+	ul {
+	  display: none;
+	}
+      }
+
+      &.active > a:link {
+	@include choose-active;
+      }
+
       > a:link {
 	@include choose-item;
 	border-right: {
@@ -84,9 +98,6 @@
 	  transition: none;
 	  @include choose-hover;
 	}
-	&.active, &:active {
-	  @include choose-active;
-	}
       }
       h3 {
         font: {
diff --git a/dev/scss/main/tutorial.scss b/dev/scss/main/tutorial.scss
index 3aeebb3..8f8d0f4 100644
--- a/dev/scss/main/tutorial.scss
+++ b/dev/scss/main/tutorial.scss
@@ -69,6 +69,32 @@
   margin-left: $logo-left-distance + 15px;
 }
 
+dl {
+  margin: 0;
+  padding-bottom: 2em;
+  dt {
+    font-weight: bold;
+    abbr {
+      border-width: 0;
+      &[data-type=token]::after {
+	color: $ids-blue-1;
+      }
+      &[data-type=span]::after {
+	color: $ids-pink-1;
+      }
+      &::after {
+	content: ' (' attr(title) ')';
+	vertical-align: bottom;
+	font-style: italic;
+	font-weight: normal;
+	font-size: 80%;
+      }
+    }
+  }
+}
+
+
+
 /*
 #tutorial {
   iframe {