diff --git a/ESP-IDF_Robot/tutorial/docs/build/simplepdf/.buildinfo b/ESP-IDF_Robot/tutorial/docs/build/simplepdf/.buildinfo
index b4e4a2210..00d025b95 100644
--- a/ESP-IDF_Robot/tutorial/docs/build/simplepdf/.buildinfo
+++ b/ESP-IDF_Robot/tutorial/docs/build/simplepdf/.buildinfo
@@ -1,4 +1,4 @@
 # Sphinx build info version 1
 # This file records the configuration used when building these files. When it is not found, a full rebuild will be done.
-config: 5a49ab05f1b667c8dc07ff0e1423ed6b
+config: 49cdfe7a476d9142b98f1a7711061aba
 tags: 62a1e7829a13fc7881b6498c52484ec0
diff --git a/ESP-IDF_Robot/tutorial/docs/build/simplepdf/_static/main.css b/ESP-IDF_Robot/tutorial/docs/build/simplepdf/_static/main.css
index c2ca301b3..c84623993 100644
--- a/ESP-IDF_Robot/tutorial/docs/build/simplepdf/_static/main.css
+++ b/ESP-IDF_Robot/tutorial/docs/build/simplepdf/_static/main.css
@@ -463,13 +463,13 @@ dl.class dl.field-list, dl.type dl.field-list, dl.function dl.field-list, dl.mem
     content: none; } }
 
 @page :first {
-  background: url(ESP-IDF_Robot.jpg);
+  background: url(ESP-IDF_Robot.jpg) no-repeat center;
   background-size: cover;
   margin: 0; }
 
 @media screen {
   #cover {
-    background: url(ESP-IDF_Robot.jpg);
+    background: url(ESP-IDF_Robot.jpg) no-repeat center;
     background-size: cover;
     margin: 0; } }
 
@@ -485,7 +485,7 @@ dl.class dl.field-list, dl.type dl.field-list, dl.function dl.field-list, dl.mem
     content: none; } }
 
 @page back_cover {
-  background: url(ESP-IDF_Robot.jpg);
+  background: url(ESP-IDF_Robot.jpg) no-repeat center;
   background-size: cover;
   margin: 0;
   color: #ffffff; }
@@ -507,7 +507,7 @@ dl.class dl.field-list, dl.type dl.field-list, dl.function dl.field-list, dl.mem
   display: flex;
   flex-wrap: wrap;
   height: 297mm;
-  background: url(ESP-IDF_Robot.jpg);
+  background: url(ESP-IDF_Robot.jpg) no-repeat center;
   background-size: cover;
   margin: 0; }
   #cover h1 {
diff --git a/ESP-IDF_Robot/tutorial/docs/build/simplepdf/esp-idf_espnow_rc-car.pdf b/ESP-IDF_Robot/tutorial/docs/build/simplepdf/esp-idf_espnow_rc-car.pdf
index 17021a88d..e4ea9f217 100644
Binary files a/ESP-IDF_Robot/tutorial/docs/build/simplepdf/esp-idf_espnow_rc-car.pdf and b/ESP-IDF_Robot/tutorial/docs/build/simplepdf/esp-idf_espnow_rc-car.pdf differ
diff --git a/ESP-IDF_Robot/tutorial/docs/build/simplepdf/index.html b/ESP-IDF_Robot/tutorial/docs/build/simplepdf/index.html
index 643cd7009..6f82ec193 100644
--- a/ESP-IDF_Robot/tutorial/docs/build/simplepdf/index.html
+++ b/ESP-IDF_Robot/tutorial/docs/build/simplepdf/index.html
@@ -8,7 +8,7 @@
    ByteRider 06-2025 documentation
   </title>
   <link href="_static/pygments.css?v=d75fae25" rel="stylesheet" type="text/css"/>
-  <link href="_static/main.css?v=8486b849" rel="stylesheet" type="text/css"/>
+  <link href="_static/main.css?v=ad24a2e8" rel="stylesheet" type="text/css"/>
   <script src="_static/documentation_options.js?v=84c8e5cb">
   </script>
   <script src="_static/doctools.js?v=9bcbadda">