make the editor more easily visible

glsl/raymarching.js

@@ -245,7 +245,7 @@ void main() {
  left: 0;
  border: none;
  background-color: rgba(255, 255, 255, 0.5);
  background-color: rgba(255, 255, 255, 0.8);
  min-width: 72ex;
  height: 100vh;