diff --git a/css/custom.css b/css/custom.css
index af67d64..890c6d0 100644
--- a/css/custom.css
+++ b/css/custom.css
@@ -8,6 +8,14 @@ div.searchbox {
 .forkme div.searchbox {
   right: 85px;
 }
+.forkme-ribbon {
+  position: absolute;
+  top: 0;
+  right: 0;
+  border: 0;
+  width: 135px;
+  height: 135px;
+}
 div.searchbox .inner {
   position: absolute;
   bottom: 0;
diff --git a/index.markdown b/index.markdown
index 8d47d01..a185cd7 100644
--- a/index.markdown
+++ b/index.markdown
@@ -13,8 +13,7 @@ extra_credits:
 {% include links.markdown %}
 
 <a href="https://github.com/openslide">
-<img style="position: absolute; top: 0; right: 0; border: 0; width: 135px; height: 135px;"
-src="/images/fork-me.png" alt="Fork me on GitHub">
+  <img class="forkme-ribbon" src="/images/fork-me.png" alt="Fork me on GitHub">
 </a>
 
 <div markdown="1" class="newsflash">