diff --git a/about/reference.docx b/about/reference.docx
index 8729296..a982ded 100644
Binary files a/about/reference.docx and b/about/reference.docx differ
diff --git a/about/resume.css b/about/resume.css
index 47b211a..a9c1c79 100644
--- a/about/resume.css
+++ b/about/resume.css
@@ -1,8 +1,8 @@
 /* Whole document */
 body {
     font-family: Helvetica, Arial, sans-serif;
-    font-size: 1rem;
-    color: #4c4f69;
+    font-size: 0.8rem;
+    color: black;
     line-height: 1.5;
     width: 800px;
     margin-inline: auto;
@@ -18,8 +18,7 @@ body {
 
 /* Title of the resume */
 h1 {
-    color: #df8e1d;
-    font-size: 2.1rem;
+    font-size: 1.6rem;
     text-align: center;
     margin-top: 0px;
     margin-bottom: 0px;
@@ -27,29 +26,26 @@ h1 {
 
 /* Titles of categories */
 h2 {
-    color: #df8e1d;
-    font-size: 1.6rem;
+    font-size: 1.4rem;
     margin-top: 0;
     margin-bottom: 0.5rem;
     border-bottom: 1px solid black;
 }
 
 h3 {
-    color: #dc8a78;
-    font-size: 1.3rem;
+    font-size: 1.2rem;
     margin-top: 0;
     margin-bottom: 0;
 }
 
 h4 {
-    color: #8c8fa1;
-    font-size: 1.1rem;
+    font-size: 1.0rem;
     margin-top: 0;
     margin-bottom: 0.5rem;
 }
 
 h6 {
-    font-size: 0.9rem;
+    font-size: 0.7rem;
     text-align: center;
     margin: 0;
     padding-bottom: 9px;
@@ -75,6 +71,7 @@ a {
     text-decoration: none;
     color: #1e66f5;
 }
+
 a:hover, a:active {
     background-color: #7287fd;
     color: #FFFFFF;
@@ -84,7 +81,7 @@ a:hover, a:active {
 
 /* Horizontal separators */
 hr {
-    color: #A6A6A6;
+    color: black;
 }
 
 /* List spacing */
@@ -101,4 +98,3 @@ p, li {
   line-height: 1.6;
 }
 
-