diff --git a/public/css/slide.css b/public/css/slide.css
index dde2653..195981b 100644
--- a/public/css/slide.css
+++ b/public/css/slide.css
@@ -243,4 +243,13 @@ pre.mermaid > svg {
     border: none !important;
     box-shadow: none !important;
     margin-bottom: -.25em !important;
+}
+
+.reveal .slides, .reveal .backgrounds, .reveal.overview {
+    transform-style: preserve-3d;
+}
+
+.reveal .slides > section,
+.reveal .slides > section > section {
+    transform-style: flat;
 }
\ No newline at end of file