diff --git a/slides.md b/slides.md
index 630dcda..45a4744 100644
--- a/slides.md
+++ b/slides.md
@@ -26,6 +26,7 @@ mdc: true
 overviewSnapshots: true
 # keywords field for exported PDF, comma-delimited
 keywords: computational imaging, holography
+css: ./style.css
 
 ---
 
diff --git a/style.css b/style.css
new file mode 100644
index 0000000..e81b260
--- /dev/null
+++ b/style.css
@@ -0,0 +1,7 @@
+:root {
+    --slidev-theme-background: black !important;
+  }
+  
+.slidev-layout {
+background-color: black !important;
+}
\ No newline at end of file