diff --git a/src/main.ts b/src/main.ts
index 4ce7112..8efb4f7 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,8 +1,14 @@
-import './styles.postcss';
+import './styles.pcss';
 import App from './App.svelte';
 
+const target = document.getElementById('app');
+if (!target)
+  throw new Error(
+    "The element with id of 'app' wasn't found on the base html file."
+  );
+
 const app = new App({
-  target: document.getElementById('app'),
+  target,
   intro: true
 });
 
diff --git a/src/styles.postcss b/src/styles.pcss
similarity index 100%
rename from src/styles.postcss
rename to src/styles.pcss