diff --git a/docs/_static/codeblocks.css b/docs/_static/codeblocks.css
new file mode 100644
index 000000000..181942a7e
--- /dev/null
+++ b/docs/_static/codeblocks.css
@@ -0,0 +1,142 @@
+/* light theme: default */
+.highlight .hll { background-color: #ffffcc }
+.highlight  { background: #f0f0f0; }
+.highlight .c { color: #60a0b0; font-style: italic } /* Comment */
+.highlight .err { border: 1px solid #FF0000 } /* Error */
+.highlight .k { color: #007020; font-weight: bold } /* Keyword */
+.highlight .o { color: #666666 } /* Operator */
+.highlight .ch { color: #60a0b0; font-style: italic } /* Comment.Hashbang */
+.highlight .cm { color: #60a0b0; font-style: italic } /* Comment.Multiline */
+.highlight .cp { color: #007020 } /* Comment.Preproc */
+.highlight .cpf { color: #60a0b0; font-style: italic } /* Comment.PreprocFile */
+.highlight .c1 { color: #60a0b0; font-style: italic } /* Comment.Single */
+.highlight .cs { color: #60a0b0; background-color: #fff0f0 } /* Comment.Special */
+.highlight .gd { color: #A00000 } /* Generic.Deleted */
+.highlight .ge { font-style: italic } /* Generic.Emph */
+.highlight .gr { color: #FF0000 } /* Generic.Error */
+.highlight .gh { color: #000080; font-weight: bold } /* Generic.Heading */
+.highlight .gi { color: #00A000 } /* Generic.Inserted */
+.highlight .go { color: #888888 } /* Generic.Output */
+.highlight .gp { color: #c65d09; font-weight: bold } /* Generic.Prompt */
+.highlight .gs { font-weight: bold } /* Generic.Strong */
+.highlight .gu { color: #800080; font-weight: bold } /* Generic.Subheading */
+.highlight .gt { color: #0044DD } /* Generic.Traceback */
+.highlight .kc { color: #007020; font-weight: bold } /* Keyword.Constant */
+.highlight .kd { color: #007020; font-weight: bold } /* Keyword.Declaration */
+.highlight .kn { color: #007020; font-weight: bold } /* Keyword.Namespace */
+.highlight .kp { color: #007020 } /* Keyword.Pseudo */
+.highlight .kr { color: #007020; font-weight: bold } /* Keyword.Reserved */
+.highlight .kt { color: #902000 } /* Keyword.Type */
+.highlight .m { color: #40a070 } /* Literal.Number */
+.highlight .s { color: #4070a0 } /* Literal.String */
+.highlight .na { color: #4070a0 } /* Name.Attribute */
+.highlight .nb { color: #007020 } /* Name.Builtin */
+.highlight .nc { color: #0e84b5; font-weight: bold } /* Name.Class */
+.highlight .no { color: #60add5 } /* Name.Constant */
+.highlight .nd { color: #555555; font-weight: bold } /* Name.Decorator */
+.highlight .ni { color: #d55537; font-weight: bold } /* Name.Entity */
+.highlight .ne { color: #007020 } /* Name.Exception */
+.highlight .nf { color: #06287e } /* Name.Function */
+.highlight .nl { color: #002070; font-weight: bold } /* Name.Label */
+.highlight .nn { color: #0e84b5; font-weight: bold } /* Name.Namespace */
+.highlight .nt { color: #062873; font-weight: bold } /* Name.Tag */
+.highlight .nv { color: #bb60d5 } /* Name.Variable */
+.highlight .ow { color: #007020; font-weight: bold } /* Operator.Word */
+.highlight .w { color: #bbbbbb } /* Text.Whitespace */
+.highlight .mb { color: #40a070 } /* Literal.Number.Bin */
+.highlight .mf { color: #40a070 } /* Literal.Number.Float */
+.highlight .mh { color: #40a070 } /* Literal.Number.Hex */
+.highlight .mi { color: #40a070 } /* Literal.Number.Integer */
+.highlight .mo { color: #40a070 } /* Literal.Number.Oct */
+.highlight .sa { color: #4070a0 } /* Literal.String.Affix */
+.highlight .sb { color: #4070a0 } /* Literal.String.Backtick */
+.highlight .sc { color: #4070a0 } /* Literal.String.Char */
+.highlight .dl { color: #4070a0 } /* Literal.String.Delimiter */
+.highlight .sd { color: #4070a0; font-style: italic } /* Literal.String.Doc */
+.highlight .s2 { color: #4070a0 } /* Literal.String.Double */
+.highlight .se { color: #4070a0; font-weight: bold } /* Literal.String.Escape */
+.highlight .sh { color: #4070a0 } /* Literal.String.Heredoc */
+.highlight .si { color: #70a0d0; font-style: italic } /* Literal.String.Interpol */
+.highlight .sx { color: #c65d09 } /* Literal.String.Other */
+.highlight .sr { color: #235388 } /* Literal.String.Regex */
+.highlight .s1 { color: #4070a0 } /* Literal.String.Single */
+.highlight .ss { color: #517918 } /* Literal.String.Symbol */
+.highlight .bp { color: #007020 } /* Name.Builtin.Pseudo */
+.highlight .fm { color: #06287e } /* Name.Function.Magic */
+.highlight .vc { color: #bb60d5 } /* Name.Variable.Class */
+.highlight .vg { color: #bb60d5 } /* Name.Variable.Global */
+.highlight .vi { color: #bb60d5 } /* Name.Variable.Instance */
+.highlight .vm { color: #bb60d5 } /* Name.Variable.Magic */
+.highlight .il { color: #40a070 } /* Literal.Number.Integer.Long */
+
+/* dark theme: modified "native" */
+:root[data-theme="dark"] .highlight pre { background-color: #404040 }
+:root[data-theme="dark"] .highlight .hll { background-color: #404040 }
+:root[data-theme="dark"] .highlight .c { color: #999999; font-style: italic } /* Comment */
+:root[data-theme="dark"] .highlight .err { color: #a61717; background-color: #e3d2d2 } /* Error */
+:root[data-theme="dark"] .highlight .g { color: #d0d0d0 } /* Generic */
+:root[data-theme="dark"] .highlight .k { color: #6ab825; font-weight: bold } /* Keyword */
+:root[data-theme="dark"] .highlight .l { color: #d0d0d0 } /* Literal */
+:root[data-theme="dark"] .highlight .n { color: #d0d0d0 } /* Name */
+:root[data-theme="dark"] .highlight .o { color: #d0d0d0 } /* Operator */
+:root[data-theme="dark"] .highlight .x { color: #d0d0d0 } /* Other */
+:root[data-theme="dark"] .highlight .p { color: #d0d0d0 } /* Punctuation */
+:root[data-theme="dark"] .highlight .cm { color: #999999; font-style: italic } /* Comment.Multiline */
+:root[data-theme="dark"] .highlight .cp { color: #cd2828; font-weight: bold } /* Comment.Preproc */
+:root[data-theme="dark"] .highlight .c1 { color: #999999; font-style: italic } /* Comment.Single */
+:root[data-theme="dark"] .highlight .cs { color: #e50808; font-weight: bold; background-color: #520000 } /* Comment.Special */
+:root[data-theme="dark"] .highlight .gd { color: #d22323 } /* Generic.Deleted */
+:root[data-theme="dark"] .highlight .ge { color: #d0d0d0; font-style: italic } /* Generic.Emph */
+:root[data-theme="dark"] .highlight .gr { color: #d22323 } /* Generic.Error */
+:root[data-theme="dark"] .highlight .gh { color: #ffffff; font-weight: bold } /* Generic.Heading */
+:root[data-theme="dark"] .highlight .gi { color: #589819 } /* Generic.Inserted */
+:root[data-theme="dark"] .highlight .go { color: #cccccc } /* Generic.Output */
+:root[data-theme="dark"] .highlight .gp { color: #aaaaaa } /* Generic.Prompt */
+:root[data-theme="dark"] .highlight .gs { color: #d0d0d0; font-weight: bold } /* Generic.Strong */
+:root[data-theme="dark"] .highlight .gu { color: #ffffff; text-decoration: underline } /* Generic.Subheading */
+:root[data-theme="dark"] .highlight .gt { color: #d22323 } /* Generic.Traceback */
+:root[data-theme="dark"] .highlight .kc { color: #6ab825; font-weight: bold } /* Keyword.Constant */
+:root[data-theme="dark"] .highlight .kd { color: #6ab825; font-weight: bold } /* Keyword.Declaration */
+:root[data-theme="dark"] .highlight .kn { color: #6ab825; font-weight: bold } /* Keyword.Namespace */
+:root[data-theme="dark"] .highlight .kp { color: #6ab825 } /* Keyword.Pseudo */
+:root[data-theme="dark"] .highlight .kr { color: #6ab825; font-weight: bold } /* Keyword.Reserved */
+:root[data-theme="dark"] .highlight .kt { color: #6ab825; font-weight: bold } /* Keyword.Type */
+:root[data-theme="dark"] .highlight .ld { color: #d0d0d0 } /* Literal.Date */
+:root[data-theme="dark"] .highlight .m { color: #7fb1d7 } /* Literal.Number */
+:root[data-theme="dark"] .highlight .s { color: #ed9d13 } /* Literal.String */
+:root[data-theme="dark"] .highlight .na { color: #bbbbbb; } /* Name.Attribute */
+:root[data-theme="dark"] .highlight .nb { color: #29a5b3; } /* Name.Builtin */
+:root[data-theme="dark"] .highlight .nc { color: #6494d8;} /* Name.Class */
+:root[data-theme="dark"] .highlight .no { color: #40ffff; } /* Name.Constant */
+:root[data-theme="dark"] .highlight .nd { color: #ffa500; } /* Name.Decorator */
+:root[data-theme="dark"] .highlight .ni { color: #d0d0d0; } /* Name.Entity */
+:root[data-theme="dark"] .highlight .ne { color: #bbbbbb; } /* Name.Exception */
+:root[data-theme="dark"] .highlight .nf { color: #6494d8; } /* Name.Function */
+:root[data-theme="dark"] .highlight .nl { color: #d0d0d0; } /* Name.Label */
+:root[data-theme="dark"] .highlight .nn { color: #6494d8;} /* Name.Namespace */
+:root[data-theme="dark"] .highlight .nx { color: #d0d0d0; } /* Name.Other */
+:root[data-theme="dark"] .highlight .py { color: #d0d0d0; } /* Name.Property */
+:root[data-theme="dark"] .highlight .nt { color: #6ab825; font-weight: bold } /* Name.Tag */
+:root[data-theme="dark"] .highlight .nv { color: #40ffff; } /* Name.Variable */
+:root[data-theme="dark"] .highlight .ow { color: #6ab825; font-weight: bold } /* Operator.Word */
+:root[data-theme="dark"] .highlight .w  { color: #666666; } /* Text.Whitespace */
+:root[data-theme="dark"] .highlight .mf { color: #7fb1d7; } /* Literal.Number.Float */
+:root[data-theme="dark"] .highlight .mh { color: #7fb1d7; } /* Literal.Number.Hex */
+:root[data-theme="dark"] .highlight .mi { color: #7fb1d7; } /* Literal.Number.Integer */
+:root[data-theme="dark"] .highlight .mo { color: #7fb1d7; } /* Literal.Number.Oct */
+:root[data-theme="dark"] .highlight .sb { color: #ed9d13; } /* Literal.String.Backtick */
+:root[data-theme="dark"] .highlight .sc { color: #ed9d13; } /* Literal.String.Char */
+:root[data-theme="dark"] .highlight .sd { color: #ed9d13; } /* Literal.String.Doc */
+:root[data-theme="dark"] .highlight .s2 { color: #ed9d13; } /* Literal.String.Double */
+:root[data-theme="dark"] .highlight .se { color: #ed9d13; } /* Literal.String.Escape */
+:root[data-theme="dark"] .highlight .sh { color: #ed9d13; } /* Literal.String.Heredoc */
+:root[data-theme="dark"] .highlight .si { color: #ed9d13; } /* Literal.String.Interpol */
+:root[data-theme="dark"] .highlight .sx { color: #ffa500; } /* Literal.String.Other */
+:root[data-theme="dark"] .highlight .sr { color: #ed9d13; } /* Literal.String.Regex */
+:root[data-theme="dark"] .highlight .s1 { color: #ed9d13; } /* Literal.String.Single */
+:root[data-theme="dark"] .highlight .ss { color: #ed9d13; } /* Literal.String.Symbol */
+:root[data-theme="dark"] .highlight .bp { color: #29a5b3; } /* Name.Builtin.Pseudo */
+:root[data-theme="dark"] .highlight .vc { color: #40ffff; } /* Name.Variable.Class */
+:root[data-theme="dark"] .highlight .vg { color: #40ffff; } /* Name.Variable.Global */
+:root[data-theme="dark"] .highlight .vi { color: #40ffff; } /* Name.Variable.Instance */
+:root[data-theme="dark"] .highlight .il { color: #7fb1d7; } /* Literal.Number.Integer.Long */
diff --git a/docs/_templates/layout.html b/docs/_templates/layout.html
index 6f2fb3b7f..5c45e7f64 100644
--- a/docs/_templates/layout.html
+++ b/docs/_templates/layout.html
@@ -6,7 +6,7 @@
   <title>{{ title|striptags|e }}{{ titlesuffix }}</title>
   <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.6.3/css/all.css" integrity="sha384-UHRtZLI+pbxtHCWp1t77Bi1L4ZtiqrqD80Kn4Z8NTSRyMA2Fd33n5dQ8lWUE00s/" crossorigin="anonymous">
   <link rel="stylesheet" href="{{ pathto('_static/style.css', 1)|e }}" type="text/css" />
-  <link rel="stylesheet" href="{{ pathto('_static/pygments.css', 1) }}" type="text/css" />
+  <link rel="stylesheet" href="{{ pathto('_static/codeblocks.css', 1) }}" type="text/css" />
   {%- block css %}
   {%- for css in css_files %}
     {%- if css|attr("filename") %}