diff --git a/static/css/lanyon.css b/static/css/lanyon.css
index 721c9d3..1d57108 100644
--- a/static/css/lanyon.css
+++ b/static/css/lanyon.css
@@ -75,12 +75,12 @@ h1, h2, h3, h4, h5, h6 {
 .container {
   max-width: 28rem;
 }
-@media (min-width: 38rem) {
+@media (min-width: 38em) {
   .container {
     max-width: 32rem;
   }
 }
-@media (min-width: 56rem) {
+@media (min-width: 56em) {
   .container {
     max-width: 38rem;
   }
@@ -114,7 +114,7 @@ h1, h2, h3, h4, h5, h6 {
   letter-spacing: 0;
 }
 
-@media (max-width: 48rem) {
+@media (max-width: 48em) {
   .masthead-title {
     text-align: center;
   }
@@ -155,7 +155,7 @@ h1, h2, h3, h4, h5, h6 {
   -webkit-transition: all .3s ease-in-out;
           transition: all .3s ease-in-out;
 }
-@media (min-width: 30rem) {
+@media (min-width: 30em) {
   .sidebar {
     font-size: .75rem; /* 14px */
   }
@@ -190,7 +190,7 @@ a.sidebar-nav-item:focus {
   border-color: transparent;
 }
 
-@media (min-width: 48rem) {
+@media (min-width: 48em) {
   .sidebar-item {
     padding: 1.5rem;
   }
@@ -202,54 +202,64 @@ a.sidebar-nav-item:focus {
 
 /* Hide the sidebar checkbox that we toggle with `.sidebar-toggle` */
 .sidebar-checkbox {
-  display: none;
+  position: absolute;
+  opacity: 0;
+  -webkit-user-select: none;
+     -moz-user-select: none;
+          user-select: none;
 }
 
 /* Style the `label` that we use to target the `.sidebar-checkbox` */
 .sidebar-toggle {
   position: absolute;
-  top:  1rem;
+  top:  .8rem;
   left: 1rem;
   display: block;
-  width: 2.2rem;
-  padding: .5rem .65rem;
+  padding: .25rem .75rem;
   color: #505050;
   background-color: #fff;
-  border-radius: 4px;
+  border-radius: .25rem;
   cursor: pointer;
 }
+
 .sidebar-toggle:before {
-  display: block;
+  display: inline-block;
+  width: 1rem;
+  height: .75rem;
   content: "";
-  width: 100%;
-  padding-bottom: .125rem;
-  border-top: .375rem double;
-  border-bottom: .125rem solid;
-
-  /* Make the border inside the box */
-  -webkit-box-sizing: border-box;
-     -moz-box-sizing: border-box;
-          box-sizing: border-box;
+  background-image: -webkit-linear-gradient(to bottom, #555, #555 20%, #fff 20%, #fff 40%, #555 40%, #555 60%, #fff 60%, #fff 80%, #555 80%, #555 100%);
+  background-image:    -moz-linear-gradient(to bottom, #555, #555 20%, #fff 20%, #fff 40%, #555 40%, #555 60%, #fff 60%, #fff 80%, #555 80%, #555 100%);
+  background-image:     -ms-linear-gradient(to bottom, #555, #555 20%, #fff 20%, #fff 40%, #555 40%, #555 60%, #fff 60%, #fff 80%, #555 80%, #555 100%);
+  background-image:         linear-gradient(to bottom, #555, #555 20%, #fff 20%, #fff 40%, #555 40%, #555 60%, #fff 60%, #fff 80%, #555 80%, #555 100%);
 }
 
 .sidebar-toggle:active,
+#sidebar-checkbox:focus ~ .sidebar-toggle,
 #sidebar-checkbox:checked ~ .sidebar-toggle {
   color: #fff;
-  background-color: #505050;
+  background-color: #555;
+}
+
+.sidebar-toggle:active:before,
+#sidebar-checkbox:focus ~ .sidebar-toggle:before,
+#sidebar-checkbox:checked ~ .sidebar-toggle:before {
+  background-image: -webkit-linear-gradient(to bottom, #fff, #fff 20%, #555 20%, #555 40%, #fff 40%, #fff 60%, #555 60%, #555 80%, #fff 80%, #fff 100%);
+  background-image:    -moz-linear-gradient(to bottom, #fff, #fff 20%, #555 20%, #555 40%, #fff 40%, #fff 60%, #555 60%, #555 80%, #fff 80%, #fff 100%);
+  background-image:     -ms-linear-gradient(to bottom, #fff, #fff 20%, #555 20%, #555 40%, #fff 40%, #fff 60%, #555 60%, #555 80%, #fff 80%, #fff 100%);
+  background-image:         linear-gradient(to bottom, #fff, #fff 20%, #555 20%, #555 40%, #fff 40%, #fff 60%, #555 60%, #555 80%, #fff 80%, #fff 100%);
 }
 
-@media (min-width: 30.1rem) {
+@media (min-width: 30.1em) {
   .sidebar-toggle {
     position: fixed;
-    width: 2.25rem;
-  }
-  .sidebar-toggle:before {
-    padding-bottom: .15rem;
-    border-top-width: .45rem;
-    border-bottom-width: .15rem;
   }
 }
 
+@media print {
+  .sidebar-toggle {
+    display: none;
+  }
+}
 
 /* Slide effect
  *
@@ -278,6 +288,7 @@ a.sidebar-nav-item:focus {
 }
 
 #sidebar-checkbox:checked + .sidebar {
+  z-index: 10;
   visibility: visible;
 }
 #sidebar-checkbox:checked ~ .sidebar,
@@ -377,7 +388,7 @@ a.pagination-item:hover {
   background-color: #f5f5f5;
 }
 
-@media (min-width: 30rem) {
+@media (min-width: 30em) {
   .pagination {
     margin: 3rem 0;
   }
@@ -525,3 +536,28 @@ a.pagination-item:hover {
 .theme-base-0f .related-posts li a:hover {
   color: #8f5536;
 }
+
+
+/*
+ * Overlay sidebar
+ *
+ * Make the sidebar content overlay the viewport content instead of pushing it
+ * aside when toggled.
+ */
+
+.sidebar-overlay #sidebar-checkbox:checked ~ .wrap {
+  -webkit-transform: translateX(0);
+      -ms-transform: translateX(0);
+          transform: translateX(0);
+}
+.sidebar-overlay #sidebar-checkbox:checked ~ .sidebar-toggle {
+  box-shadow: 0 0 0 .25rem #fff;
+}
+.sidebar-overlay #sidebar-checkbox:checked ~ .sidebar {
+  box-shadow: .25rem 0 .5rem rgba(0,0,0,.1);
+}
+
+/* Only one tweak for a reverse layout */
+.layout-reverse.sidebar-overlay #sidebar-checkbox:checked ~ .sidebar {
+  box-shadow: -.25rem 0 .5rem rgba(0,0,0,.1);
+}
diff --git a/static/css/poole.css b/static/css/poole.css
index 5e3dabe..8ec27e7 100644
--- a/static/css/poole.css
+++ b/static/css/poole.css
@@ -52,7 +52,7 @@ html {
   font-size: 16px;
   line-height: 1.5;
 }
-@media (min-width: 38rem) {
+@media (min-width: 38em) {
   html {
     font-size: 20px;
   }
@@ -70,6 +70,9 @@ a {
   color: #268bd2;
   text-decoration: none;
 }
+a strong {
+  color: inherit;
+}
 /* `:focus` is linked to `:hover` for basic accessibility */
 a:hover,
 a:focus {
@@ -175,6 +178,8 @@ pre code {
   color: inherit;
   background-color: transparent;
 }
+
+/* Pygments via Jekyll */
 .highlight {
   margin-bottom: 1rem;
   border-radius: 4px;
@@ -183,6 +188,28 @@ pre code {
   margin-bottom: 0;
 }
 
+/* Gist via GitHub Pages */
+.gist .gist-file {
+  font-family: Menlo, Monaco, "Courier New", monospace !important;
+}
+.gist .markdown-body {
+  padding: 15px;
+}
+.gist pre {
+  padding: 0;
+  background-color: transparent;
+}
+.gist .gist-file .gist-data {
+  font-size: .8rem !important;
+  line-height: 1.4;
+}
+.gist code {
+  padding: 0;
+  color: inherit;
+  background-color: transparent;
+  border-radius: 0;
+}
+
 /* Quotes */
 blockquote {
   padding: .5rem 1rem;
@@ -193,7 +220,7 @@ blockquote {
 blockquote p:last-child {
   margin-bottom: 0;
 }
-@media (min-width: 30rem) {
+@media (min-width: 30em) {
   blockquote {
     padding-right: 5rem;
     padding-left: 1.25rem;
@@ -202,6 +229,7 @@ blockquote p:last-child {
 
 img {
   display: block;
+  max-width: 100%;
   margin: 0 0 1rem;
   border-radius: 5px;
 }
@@ -381,7 +409,7 @@ a.pagination-item:hover {
   background-color: #f5f5f5;
 }
 
-@media (min-width: 30rem) {
+@media (min-width: 30em) {
   .pagination {
     margin: 3rem 0;
   }
diff --git a/static/css/syntax.css b/static/css/syntax.css
index 1264b87..15ad797 100644
--- a/static/css/syntax.css
+++ b/static/css/syntax.css
@@ -1,65 +1,64 @@
-.hll { background-color: #ffffcc }
- /*{ background: #f0f3f3; }*/
-.c { color: #999; } /* Comment */
-.err { color: #AA0000; background-color: #FFAAAA } /* Error */
-.k { color: #006699; } /* Keyword */
-.o { color: #555555 } /* Operator */
-.cm { color: #0099FF; font-style: italic } /* Comment.Multiline */
-.cp { color: #009999 } /* Comment.Preproc */
-.c1 { color: #999; } /* Comment.Single */
-.cs { color: #999; } /* Comment.Special */
-.gd { background-color: #FFCCCC; border: 1px solid #CC0000 } /* Generic.Deleted */
-.ge { font-style: italic } /* Generic.Emph */
-.gr { color: #FF0000 } /* Generic.Error */
-.gh { color: #003300; } /* Generic.Heading */
-.gi { background-color: #CCFFCC; border: 1px solid #00CC00 } /* Generic.Inserted */
-.go { color: #AAAAAA } /* Generic.Output */
-.gp { color: #000099; } /* Generic.Prompt */
-.gs { } /* Generic.Strong */
-.gu { color: #003300; } /* Generic.Subheading */
-.gt { color: #99CC66 } /* Generic.Traceback */
-.kc { color: #006699; } /* Keyword.Constant */
-.kd { color: #006699; } /* Keyword.Declaration */
-.kn { color: #006699; } /* Keyword.Namespace */
-.kp { color: #006699 } /* Keyword.Pseudo */
-.kr { color: #006699; } /* Keyword.Reserved */
-.kt { color: #007788; } /* Keyword.Type */
-.m { color: #FF6600 } /* Literal.Number */
-.s { color: #d44950 } /* Literal.String */
-.na { color: #4f9fcf } /* Name.Attribute */
-.nb { color: #336666 } /* Name.Builtin */
-.nc { color: #00AA88; } /* Name.Class */
-.no { color: #336600 } /* Name.Constant */
-.nd { color: #9999FF } /* Name.Decorator */
-.ni { color: #999999; } /* Name.Entity */
-.ne { color: #CC0000; } /* Name.Exception */
-.nf { color: #CC00FF } /* Name.Function */
-.nl { color: #9999FF } /* Name.Label */
-.nn { color: #00CCFF; } /* Name.Namespace */
-.nt { color: #2f6f9f; } /* Name.Tag */
-.nv { color: #003333 } /* Name.Variable */
-.ow { color: #000000; } /* Operator.Word */
-.w { color: #bbbbbb } /* Text.Whitespace */
-.mf { color: #FF6600 } /* Literal.Number.Float */
-.mh { color: #FF6600 } /* Literal.Number.Hex */
-.mi { color: #FF6600 } /* Literal.Number.Integer */
-.mo { color: #FF6600 } /* Literal.Number.Oct */
-.sb { color: #CC3300 } /* Literal.String.Backtick */
-.sc { color: #CC3300 } /* Literal.String.Char */
-.sd { color: #CC3300; font-style: italic } /* Literal.String.Doc */
-.s2 { color: #CC3300 } /* Literal.String.Double */
-.se { color: #CC3300; } /* Literal.String.Escape */
-.sh { color: #CC3300 } /* Literal.String.Heredoc */
-.si { color: #AA0000 } /* Literal.String.Interpol */
-.sx { color: #CC3300 } /* Literal.String.Other */
-.sr { color: #33AAAA } /* Literal.String.Regex */
-.s1 { color: #CC3300 } /* Literal.String.Single */
-.ss { color: #FFCC33 } /* Literal.String.Symbol */
-.bp { color: #336666 } /* Name.Builtin.Pseudo */
-.vc { color: #003333 } /* Name.Variable.Class */
-.vg { color: #003333 } /* Name.Variable.Global */
-.vi { color: #003333 } /* Name.Variable.Instance */
-.il { color: #FF6600 } /* Literal.Number.Integer.Long */
+.highlight .hll { background-color: #ffc; }
+.highlight .c { color: #999; } /* Comment */
+.highlight .err { color: #a00; background-color: #faa } /* Error */
+.highlight .k { color: #069; } /* Keyword */
+.highlight .o { color: #555 } /* Operator */
+.highlight .cm { color: #09f; font-style: italic } /* Comment.Multiline */
+.highlight .cp { color: #099 } /* Comment.Preproc */
+.highlight .c1 { color: #999; } /* Comment.Single */
+.highlight .cs { color: #999; } /* Comment.Special */
+.highlight .gd { background-color: #fcc; border: 1px solid #c00 } /* Generic.Deleted */
+.highlight .ge { font-style: italic } /* Generic.Emph */
+.highlight .gr { color: #f00 } /* Generic.Error */
+.highlight .gh { color: #030; } /* Generic.Heading */
+.highlight .gi { background-color: #cfc; border: 1px solid #0c0 } /* Generic.Inserted */
+.highlight .go { color: #aaa } /* Generic.Output */
+.highlight .gp { color: #009; } /* Generic.Prompt */
+.highlight .gs { } /* Generic.Strong */
+.highlight .gu { color: #030; } /* Generic.Subheading */
+.highlight .gt { color: #9c6 } /* Generic.Traceback */
+.highlight .kc { color: #069; } /* Keyword.Constant */
+.highlight .kd { color: #069; } /* Keyword.Declaration */
+.highlight .kn { color: #069; } /* Keyword.Namespace */
+.highlight .kp { color: #069 } /* Keyword.Pseudo */
+.highlight .kr { color: #069; } /* Keyword.Reserved */
+.highlight .kt { color: #078; } /* Keyword.Type */
+.highlight .m { color: #f60 } /* Literal.Number */
+.highlight .s { color: #d44950 } /* Literal.String */
+.highlight .na { color: #4f9fcf } /* Name.Attribute */
+.highlight .nb { color: #366 } /* Name.Builtin */
+.highlight .nc { color: #0a8; } /* Name.Class */
+.highlight .no { color: #360 } /* Name.Constant */
+.highlight .nd { color: #99f } /* Name.Decorator */
+.highlight .ni { color: #999; } /* Name.Entity */
+.highlight .ne { color: #c00; } /* Name.Exception */
+.highlight .nf { color: #c0f } /* Name.Function */
+.highlight .nl { color: #99f } /* Name.Label */
+.highlight .nn { color: #0cf; } /* Name.Namespace */
+.highlight .nt { color: #2f6f9f; } /* Name.Tag */
+.highlight .nv { color: #033 } /* Name.Variable */
+.highlight .ow { color: #000; } /* Operator.Word */
+.highlight .w { color: #bbb } /* Text.Whitespace */
+.highlight .mf { color: #f60 } /* Literal.Number.Float */
+.highlight .mh { color: #f60 } /* Literal.Number.Hex */
+.highlight .mi { color: #f60 } /* Literal.Number.Integer */
+.highlight .mo { color: #f60 } /* Literal.Number.Oct */
+.highlight .sb { color: #c30 } /* Literal.String.Backtick */
+.highlight .sc { color: #c30 } /* Literal.String.Char */
+.highlight .sd { color: #c30; font-style: italic } /* Literal.String.Doc */
+.highlight .s2 { color: #c30 } /* Literal.String.Double */
+.highlight .se { color: #c30; } /* Literal.String.Escape */
+.highlight .sh { color: #c30 } /* Literal.String.Heredoc */
+.highlight .si { color: #a00 } /* Literal.String.Interpol */
+.highlight .sx { color: #c30 } /* Literal.String.Other */
+.highlight .sr { color: #3aa } /* Literal.String.Regex */
+.highlight .s1 { color: #c30 } /* Literal.String.Single */
+.highlight .ss { color: #fc3 } /* Literal.String.Symbol */
+.highlight .bp { color: #366 } /* Name.Builtin.Pseudo */
+.highlight .vc { color: #033 } /* Name.Variable.Class */
+.highlight .vg { color: #033 } /* Name.Variable.Global */
+.highlight .vi { color: #033 } /* Name.Variable.Instance */
+.highlight .il { color: #f60 } /* Literal.Number.Integer.Long */
 
 .css .o,
 .css .o + .nt,