diff --git a/_output.yaml b/_output.yaml
index 38741b4..65ed853 100644
--- a/_output.yaml
+++ b/_output.yaml
@@ -8,3 +8,4 @@ bookdown::gitbook:
       link: https://github.com/hadley/r4ds/edit/master/%s
       text: "Edit"
     sharing: no
+  css: r4ds.css
diff --git a/r4ds.css b/r4ds.css
new file mode 100644
index 0000000..f23f0f4
--- /dev/null
+++ b/r4ds.css
@@ -0,0 +1,4 @@
+.book .book-header h1 {
+  opacity: 1;
+  text-align: left;
+}