diff --git a/src/static/ckeditor/contents.css b/src/static/ckeditor/contents.css
index b8f5e825..a3a80d55 100644
--- a/src/static/ckeditor/contents.css
+++ b/src/static/ckeditor/contents.css
@@ -1,138 +1,29 @@
-body {
-	line-height:1.6;
-	letter-spacing:0.5px;
-	font-size:14px;
-	font-family:Helvetica Neue,Helvetica,PingFang SC,Tahoma,Arial,sans-serif;
-	color:#545b62;
-	background-color:#fff
-}
-blockquote {
-	padding:2px 0;
-	font-style:italic;
-	border-style:solid;
-	border-color:#ccc;
-	border-width:0
-}
-a {
-	color:#0782C1
-}
-ol,ul,dl {
-	padding:0 30px
-}
-h1,h2,h3,h4,h5,h6 {
-	font-weight:600;
-	line-height:1.2
-}
-hr {
-	border:0px;
-	border-top:1px solid #ccc
-}
-pre {
-	white-space:pre-wrap;
-	word-wrap:break-word;
-	-moz-tab-size:4;
-	tab-size:4
-}
-span[lang] {
-	font-style:italic
-}
-figure {
-	text-align:center;
-	outline:solid 1px #ccc;
-	background:rgba(0,0,0,0.05);
-	padding:10px;
-	margin:10px 20px;
-	display:inline-block
-}
-figure > figcaption {
-	text-align:center;
-	display:block
-}
-img {
-	border-radius:0.5rem
-}
-a > img {
-	padding:1px;
-	margin:1px;
-	border:none;
-	outline:1px solid #0782C1
-}
-img.right {
-	border:1px solid #ccc;
-	float:right;
-	margin-left:15px;
-	padding:5px
-}
-img.left {
-	border:1px solid #ccc;
-	float:left;
-	margin-right:15px;
-	padding:5px
-}
-.marker {
-	background-color:Yellow
-}
-.cke_editable {
-	font-size:14px;
-	word-wrap:break-word
-}
-.cke_contents_ltr blockquote {
-	padding-left:20px;
-	padding-right:8px;
-	border-left-width:5px
-}
-.cke_contents_rtl blockquote {
-	padding-left:8px;
-	padding-right:20px;
-	border-right-width:5px
-}
-.code-featured {
-	border:5px solid red
-}
-.math-featured {
-	padding:20px;
-	box-shadow:0 0 2px rgba(200,0,0,1);
-	background-color:rgba(255,0,0,0.05);
-	margin:10px
-}
-.image-clean {
-	border:0;
-	background:none;
-	padding:0
-}
-.image-clean > figcaption {
-	font-size:.9em;
-	text-align:right
-}
-.image-grayscale {
-	background-color:white;
-	color:#666
-}
-.image-grayscale img,img.image-grayscale {
-	filter:grayscale(100%)
-}
-.embed-240p {
-	max-width:426px;
-	max-height:240px;
-	margin:0 auto
-}
-.embed-360p {
-	max-width:640px;
-	max-height:360px;
-	margin:0 auto
-}
-.embed-480p {
-	max-width:854px;
-	max-height:480px;
-	margin:0 auto
-}
-.embed-720p {
-	max-width:1280px;
-	max-height:720px;
-	margin:0 auto
-}
-.embed-1080p {
-	max-width:1920px;
-	max-height:1080px;
-	margin:0 auto
-}
\ No newline at end of file
+body{line-height:1.6;letter-spacing:0.5px;font-size:14px;font-family:Helvetica Neue,Helvetica,PingFang SC,Tahoma,Arial,sans-serif;color:#6c757d;background:#fff}
+blockquote{padding:2px 0;font-style:italic;border-style:solid;border-color:#ccc;border-width:0}
+a{color:#007bff}
+ol,ul,dl{padding:0 30px}
+h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.2}
+hr{border:0px;border-top:1px solid #ccc}
+pre{white-space:pre-wrap;word-wrap:break-word;-moz-tab-size:4;tab-size:4}
+span[lang]{font-style:italic}
+figure{text-align:center;outline:solid 1px #ccc;background:rgba(0,0,0,0.05);padding:10px;margin:10px 20px;display:inline-block}
+figure > figcaption{text-align:center;display:block}
+img{border-radius:.5rem}
+a > img{padding:1px;margin:1px;border:none;outline:1px solid #0782C1}
+img.right{border:1px solid #ccc;float:right;margin-left:15px;padding:5px}
+img.left{border:1px solid #ccc;float:left;margin-right:15px;padding:5px}
+.marker{background-color:Yellow}
+.cke_editable{font-size:14px;word-wrap:break-word}
+.cke_contents_ltr blockquote{padding-left:20px;padding-right:8px;border-left-width:5px}
+.cke_contents_rtl blockquote{padding-left:8px;padding-right:20px;border-right-width:5px}
+.code-featured{border:5px solid red}
+.math-featured{padding:20px;box-shadow:0 0 2px rgba(200,0,0,1);background-color:rgba(255,0,0,0.05);margin:10px}
+.image-clean{border:0;background:none;padding:0}
+.image-clean > figcaption{font-size:.9em;text-align:right}
+.image-grayscale{background-color:white;color:#666}
+.image-grayscale img,img.image-grayscale{filter:grayscale(100%)}
+.embed-240p{max-width:426px;max-height:240px;margin:0 auto}
+.embed-360p{max-width:640px;max-height:360px;margin:0 auto}
+.embed-480p{max-width:854px;max-height:480px;margin:0 auto}
+.embed-720p{max-width:1280px;max-height:720px;margin:0 auto}
+.embed-1080p{max-width:1920px;max-height:1080px;margin:0 auto}
\ No newline at end of file