some minor updates

src/App.vue

@@ -3,7 +3,7 @@
     <Nav/>
   </header>
   <main>
-    <div class="spacer"></div>
+    <div :style="{height: offset + 'px'}"/>
     <router-view name="main"/>
   </main>
   <footer class="mt-auto">
@@ -16,9 +16,27 @@
 import Nav from "@/components/Nav";
 import Footer from "@/components/Footer";
 import CookieConsentBtn from "@/components/CookieConsentBtn";
+import {onMounted, ref} from "vue";
 
 export default {
   components: {Footer, Nav, CookieConsentBtn},
+  setup() {
+    const offset = ref(0)
+
+    const setOffset = () => {
+      return document.getElementsByTagName('nav')[0].clientHeight
+    }
+
+    window.onresize = () => {
+      offset.value = setOffset()
+    }
+
+    onMounted(() => {
+      offset.value = setOffset()
+    })
+
+    return {offset}
+  }
 }
 </script>
 
@@ -28,10 +46,6 @@ export default {
   src: local("Obitron"), url("assets/fonts/Orbitron-VariableFont_wght.ttf") format("truetype");
 }
 
-.spacer {
-  height: 70px;
-}
-
 #cookie-btn {
   position: fixed;
   bottom: 30px;