diff --git a/example/src/index.css b/example/src/index.css
index 1851ded3..830e6fa4 100644
--- a/example/src/index.css
+++ b/example/src/index.css
@@ -136,7 +136,7 @@ nav a.active:before {
   color: #111;
 }
 
-.dark-node {
+.react-flow__node.dark-node {
   background: #333;
   color: #f8f8f8;
 }
diff --git a/src/style.css b/src/style.css
index f9f41504..fc77e7a6 100644
--- a/src/style.css
+++ b/src/style.css
@@ -103,8 +103,6 @@
 .react-flow__node {
   position: absolute;
   color: #222;
-  font-family: sans-serif;
-  font-size: 12px;
   text-align: center;
   user-select: none;
   pointer-events: all;
@@ -131,6 +129,7 @@
   border-radius: 5px;
   width: 150px;
   background: #ff6060;
+  font-size: 12px;
 }
 
 .react-flow__node-input {
@@ -138,6 +137,7 @@
   border-radius: 5px;
   width: 150px;
   background: #9999ff;
+  font-size: 12px;
 }
 
 .react-flow__node-output {
@@ -145,6 +145,7 @@
   border-radius: 5px;
   width: 150px;
   background: #55dd99;
+  font-size: 12px;
 }
 
 .react-flow__handle {