Technical Documentation Page - Build a Technical Documentation Page

Tell us what’s happening:
Describe your issue in detail here.

Your code so far

<!-- file: index.html -->
<!DOCTYPE html>
<html land="en"></html>
  <meta charset="UTF-8"></meta>
  <meta name="viewport" content="width=device-width, initial-scale=1.0"
<link rel="stylesheet" href="styles.css"></link>
<main id="main-doc"> 
<section class="main-section" id="Introduction"><header>Introduction<p></p><p></p><code></code><li></li></header></section>
 <section class="main-section"id="What_you_should_already_know"><header>What you should already know<p></p><p></p><code></code><li></li></section>
<section class="main-section" id="Javascript_and_java"><header>Javascript and java<p></p><p></p><code></code><li></li></section>
<section class="main-section" id="Hello_world"><header>Hello world<p></p><p></p><code></code><li></li></section> <section class="main-section" id="Variables"><header>Variables<p></p><p></p><code></code><li></li></section>
<nav id="navbar"><header>Js documentation</header>
<a class="nav-link" href="#Introduction">Introduction</a>
<a class="nav-link" href="#What_you_should_already_know">What you should already know</a>
<a class="nav-link" href="#Javascript_and_java">Javascript and java</a>
<a class="nav-link" href="#Hello_world">Hello world</a>
<a class="nav-link" href="#Variables">Variables</a>
/* file: styles.css */
 @media only screen and (max-width: 768px) {
    /* For mobile phones: */
    [class*="col-"] {
        width: 100%;

Your browser information:

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/ Safari/537.36

Challenge: Technical Documentation Page - Build a Technical Documentation Page

Link to the challenge:

i feel like i have done everything correctly but my code is not passing. still asking for at least one media query. kindly help.
thanks in advance.

You need to close > the meta element before the link element.