Make elements in WebC components override the component names

src/_includes/main/header-main.webc

@@ -1,4 +1,4 @@
-<header class="main-header">
+<header webc:root="override" class="main-header">
     <noscript>
         JavaScript is disabled in your browser. To get the best user experience on
         this website, it is recommended that you enable it.
@@ -10,7 +10,7 @@
 </header>
 
 <style webc:keep webc:bucket="defer">
-    header-main {
+    .main-header {
         width: 100%;
         background-color: var(--clr-main-header-bg);
         display: flex;

src/_includes/main/navbar.webc

@@ -1,4 +1,4 @@
-<nav class="navbar">
+<nav webc:root="override" class="navbar">
     <ul class="nav__menu">
         <li><a href="/home">Home</a></li>
         <li><a href="/about/">About</a></li>
@@ -14,7 +14,7 @@
 </nav>
 
 <style webc:keep webc:bucket="defer">
-    navbar {
+    .navbar {
         background: var(--clr-navbar-bg);
         padding: 0 0.6rem;
         width: 100%;
@@ -64,7 +64,7 @@
     // Make the navigation bar sticky
 
     // const header = document.querySelector(".main-header");
-    const navbar = document.querySelector("navbar");
+    const navbar = document.querySelector(".navbar");
     window.addEventListener("scroll", e => {
         const scrollPos = window.scrollY || document.documentElement.scrollTop;
         const stickyLine = document.querySelector(".main-header").scrollHeight - navbar.scrollHeight;

src/_includes/main/site-btn.webc

@@ -1,4 +1,4 @@
-<div class="site-btn__container">
+<div webc:root="override" class="site-btn__container">
     <div>
         <a href="https://leilukin.neocities.org/" target="_blank"><img src="/assets/leilukin/Leilukins-Hub-button.png" alt="Button of Leilukin's Hub" title="Leilukin's Hub"></a>
     </div>

src/_includes/main/top-btn.webc

@@ -1,4 +1,4 @@
-<button class="top-btn hidden" aria-label="Scroll to top">
+<button webc:root="override" class="top-btn hidden" aria-label="Scroll to top">
     <img src="/assets/images/elements/top.svg" alt="">
 </button>