diff --git a/.prettierignore b/.prettierignore
index f1905b09..3554a9b6 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -1,7 +1,4 @@
.github/
-css/blueprint/
-lang/
-spec/
package-lock.json
*.md
_layouts/default.html
diff --git a/_layouts/default.html b/_layouts/default.html
index ed22fc50..4b0c4eb6 100644
--- a/_layouts/default.html
+++ b/_layouts/default.html
@@ -3,9 +3,6 @@
- {% if page.custom_css %}
-
- {% endif %}
{% seo %}
diff --git a/css/lang/ar.css b/css/lang/ar.css
deleted file mode 100644
index 462f1a65..00000000
--- a/css/lang/ar.css
+++ /dev/null
@@ -1,30 +0,0 @@
-@import url(http://fonts.googleapis.com/earlyaccess/droidarabickufi.css);
-@import url(http://fonts.googleapis.com/earlyaccess/droidarabicnaskh.css);
-@import url(http://fonts.googleapis.com/earlyaccess/thabit.css);
-
-
-html {
- font-family: 'Droid Arabic Naskh', tahoma, Helvetica, Arial, sans-serif;
- line-height: 1.8em;
-}
-
-h1, h2, h3, h4, h5, h6 {
- font-family: 'Droid Arabic Kufi', Arial, sans-serif;
-}
-
-h3 {
- text-align: right;
- font-weight: bold;
-}
-
-code {
- direction: ltr !important;
- background-color: #ecf0f1;
- padding: 5px;
- font-family: 'Thabit', 'Courier New', serif;
- font-size: 18px;
-}
-
-p {
- text-align: justify;
-}
diff --git a/css/lang/zh-CN.css b/css/lang/zh-CN.css
deleted file mode 100644
index f1ee22c2..00000000
--- a/css/lang/zh-CN.css
+++ /dev/null
@@ -1,3 +0,0 @@
-html { font-size: 16px; }
-
-h1, h2, h3 { font-family: "Microsoft YaHei", "Heiti TC", "Heiti SC"; }
diff --git a/css/lang/zh-TW.css b/css/lang/zh-TW.css
deleted file mode 100644
index 24cc6330..00000000
--- a/css/lang/zh-TW.css
+++ /dev/null
@@ -1,3 +0,0 @@
-html { font-size: 16px; }
-
-h1, h2, h3 { font-family: "Microsoft JhengHei", "Microsoft YaHei", "Heiti TC", "Heiti SC"; }