This is my code:
<main>
<header id="header">
<img id="header-img" src="https://cdn.mos.cms.futurecdn.net/wnt8XoAdv5GCk5NdC7SGwK-650-80.jpg" alt="Company Logo">
<nav class="topnav" id="nav-bar">
<button class="nav-link" accesskey="1">
<a href="#solarsystem">Solar System</a>
</button>
<button class="nav-link" accesskey="2">
<a href="#galaxy">Galaxy</a>
</button>
<button class="nav-link" accesskey="3">
<a href="#universe">Universe</a>
</button>
</nav>
<p>
Find out the mysteries of the Universe.
</p>
</header>
<img id="solarsystem" src="https://upload.wikimedia.org/wikipedia/commons/thumb/c/cb/Planets2013.svg/2000px-Planets2013.svg.png" alt="solar system">
<img id="galaxy" src="https://wallpaperaccess.com/full/639089.jpg" alt="galaxy">
<img id="universe" src="https://binaryfortressdownloads.com/Download/WPF/Images/23405/WallpaperFusion-the-observable-universe-1920x1080.jpg" alt="universe">
<section>
<iframe id="video" width="950" height="315" src="https://www.youtube.com/embed/nGnX6GkrOgk" allowfullscreen></iframe>
</section>
<form id="form" action="mailto:https://www.freecodecamp.com/email-submit)." method="post" enctype="text/plain">
<input id="email" name="email" type="email" placeholder="Enter your E-mail here!"required>
<input id="submit" type="submit">
</form>
</main>
<footer>
<a href="#header">Back to Top</a>
</footer>
<script src="https://cdn.freecodecamp.org/testable-projects-fcc/v1/bundle.js"
</script>
I am 15/16 and when i click my nav bar it moves to where its supposed to its just not passing. Any help appreciated.