diff --git a/assets/css/markdown-dark.css b/assets/css/markdown-dark.css
new file mode 100644
index 0000000..10c78d7
--- /dev/null
+++ b/assets/css/markdown-dark.css
@@ -0,0 +1,89 @@
+#contentBody img {
+  box-shadow: 0px 3px 15px rgba(255,255,255,0.2);
+}
+
+#contentBody hr {
+  border-bottom: 1px solid #201d1a;
+}
+
+#contentBody hr {
+  background-color: #1e1b17;
+}
+
+#contentBody blockquote {
+  color: #958c82;
+  border-left: 0.25em solid #201d1a;
+}
+
+#contentBody kbd {
+  color: #bbb2a9;
+  background-color: #050403;
+  border: solid 1px #39342e;
+  border-bottom-color: #6a625a;
+  box-shadow: inset 0 -1px 0 #6a625a;
+}
+
+#contentBody h1 .octicon-link,
+#contentBody h2 .octicon-link,
+#contentBody h3 .octicon-link,
+#contentBody h4 .octicon-link,
+#contentBody h5 .octicon-link,
+#contentBody h6 .octicon-link {
+  color: #e4e0dc;
+}
+
+#contentBody h1 {
+  border-bottom: 1px solid #363636;
+}
+
+#contentBody h2 {
+  border-bottom: 1px solid #363636;
+}
+
+
+#contentBody h6 {
+  font-size: 0.85em;
+  color: #958c82;
+}
+
+#contentBody table th,
+#contentBody table td {
+  padding: 6px 13px;
+  border: 1px solid #363636;
+  background-color: #090909;
+}
+
+#contentBody img {
+  background-color: #090909;
+}
+
+
+#contentBody code {
+  background-color: #090909;
+}
+
+#contentBody .highlight pre,
+#contentBody pre {
+  background-color: #090909;
+}
+
+#contentBody .full-commit .btn-outline:not(:disabled):hover {
+  color: #005cc5;
+  border-color: #005cc5;
+}
+
+#contentBody kbd {
+  color: #bbb2a9;
+  background-color: #050403;
+  border: solid 1px #2e2a25;
+  border-bottom-color: #39342e;
+  box-shadow: inset 0 -1px 0 #c6cbd1;
+}
+
+#contentBody :checked+.radio-label {
+  border-color: #0366d6;
+}
+
+#contentBody hr {
+  border-bottom-color: #111;
+}
diff --git a/assets/css/markdown.css b/assets/css/markdown.css
index f533d29..d55bc25 100644
--- a/assets/css/markdown.css
+++ b/assets/css/markdown.css
@@ -485,7 +485,6 @@
   font-size: 85%;
   line-height: 1.45;
   background-color: #f6f6f6;
-  border-radius: 3px;
 }
 
 #contentBody pre code {
diff --git a/assets/css/style-dark.css b/assets/css/style-dark.css
new file mode 100644
index 0000000..685e021
--- /dev/null
+++ b/assets/css/style-dark.css
@@ -0,0 +1,52 @@
+/* General */
+body {
+  background-color: #101010;
+  color: #8f8f8f;
+}
+
+a:link {
+  color: #8f8f8f;
+}
+
+a:visited {
+  color: #8f8f8f;
+}
+
+a:hover {
+  color: #8f8f8f;
+}
+
+a:active {
+  color: #8f8f8f;
+}
+
+#searchBox #searchBoxInput {
+  color: #8f8f8f;
+  background-color:#363636;
+  border: solid 1px #363636;
+}
+
+#searchBox #searchBoxInput::placeholder {
+  color: #363636;
+}
+
+#searchResults {
+  background-color:#363636;
+  border: solid 1px #363636;
+}
+
+#searchResults mark {
+  background-color: #222020;
+}
+
+#tags li a {
+  background-color: #222020;
+}
+
+#contentsList hr.separator {
+  border: solid 1px #363636;
+}
+
+img.avatar-border {
+  filter: invert(100%);
+}
\ No newline at end of file
diff --git a/layouts/index.html b/layouts/index.html
index 1bc104a..9956da5 100644
--- a/layouts/index.html
+++ b/layouts/index.html
@@ -8,7 +8,7 @@
           <!-- avator -->
           <div class="avatar">
             <img class="avatarMask" src="/img/{{ .Site.Params.avatar }}" alt="avatar">
-            <img src="/img/avatar-border.svg" alt="avatar-border">
+            <img src="/img/avatar-border.svg" class="avatar-border" alt="avatar-border">
           </div>
           <!-- author -->
           <h1 class="author">{{ .Site.Params.Author }}</h1>
diff --git a/layouts/partials/head.html b/layouts/partials/head.html
index 4ce4956..491bdbf 100644
--- a/layouts/partials/head.html
+++ b/layouts/partials/head.html
@@ -18,7 +18,11 @@
   {{ $syntaxHighlight := resources.Get "css/syntax-highlight.css" }}
   {{ $css := slice $style $markdown $syntaxHighlight | resources.Concat "style.css" | resources.Minify | resources.Fingerprint }}
   <link rel="stylesheet" href="{{ $css.Permalink }}" integrity="{{ $css.Data.Integrity }}">
-  <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.10.2/css/all.css" integrity="sha384-rtJEYb85SiYWgfpCr0jn174XgJTn4rptSOQsMroFBPQSGLdOC5IbubP6lJ35qoM9" crossorigin="anonymous">
+  {{ $styleDark := resources.Get "css/style-dark.css" }}
+  {{ $markdownDark := resources.Get "css/markdown-dark.css" }}
+  {{ $cssDark := slice $styleDark $markdownDark | resources.Concat "style-dark.css" | resources.Minify | resources.Fingerprint }}
+  <link rel="stylesheet" href="{{ $cssDark.Permalink }}" media="(prefers-color-scheme: dark)" integrity="{{ $cssDark.Data.Integrity }}">
+  <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.8.1/css/all.css" integrity="sha384-50oBUHEmvpQ+1lW4y57PTFmhCaXp0ML5d60M1M7uH2+nqUivzIebhndOJK28anvf" crossorigin="anonymous">
 
   <!-- custom css -->
   {{ range .Site.Params.custom_css }}
diff --git a/layouts/partials/header.html b/layouts/partials/header.html
index 9c1d7e7..cf8a7ba 100644
--- a/layouts/partials/header.html
+++ b/layouts/partials/header.html
@@ -2,7 +2,7 @@
   <!-- avator -->
   <div class="avatar">
     <img class="avatarMask" src="{{ .Site.BaseURL }}/img/{{ .Site.Params.avatar }}">
-    <a href="{{ .Site.BaseURL }}"><img src="{{ .Site.BaseURL }}/img/avatar-border.svg"></a>
+    <a href="{{ .Site.BaseURL }}"><img class="avatar-border" src="{{ .Site.BaseURL }}/img/avatar-border.svg"></a>
   </div>
   <!-- author -->
   <h2><a class="author" href="{{ .Site.BaseURL }}">{{ .Site.Params.Author }}</a></h2>