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HTML

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Adding Classes

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About the <head>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

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Insecure Resource

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CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

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Add External Stylesheets/Pens

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JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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HTML 

              
                <div id="smooth-wrapper">
  <div id="smooth-content">

    <div class="container">
      <section class="panel intro" style="background-image: url('images/panel-intro-bg.jpg')">
        <div class="content">
          <p class="eyebrow content-fade-in">Timeline Example</p>

          <h1 class="content-fade-in">Heading here</h1>

          <p class="content-fade-in">
            Lorem ipsum dolor sit amet consectetur, adipisicing
            elit. Non soluta dignissimos rerum quod quae?
            Asperiores, vitae modi placeat nostrum amet mollitia at
            eaque nihil ratione expedita distinctio facilis!
            Perspiciatis, repellat?
          </p>
          <p class="content-fade-in">
            Lorem ipsum dolor sit amet consectetur adipisicing elit.
            Sapiente et numquam voluptates facilis esse alias at
            maiores dolor voluptatem laborum, illo animi quod? Dicta
            autem illum odio fugiat. Porro, veniam!
          </p>

          <button href="#" class="button modal-btn content-fade-in" data-target="shareStory">
            Button
          </button>
        </div>
        <a href="#storyBoard" class="button-round content-fade-in" id="dragScrollBtn">
          Drag or <br />
          Scroll
        </a>
      </section>

      <section class="panel story-board" id="storyBoard">
        <!-- <div class="overlay preview show">
                            <div class="button-round interact">
                                Click to <br />
                                Interact
                            </div>
                        </div> -->
        <ul class="years">
          <li class="year" id="1993">
            <h3>1993</h3>
            <ul class="stories has-lodge">
              <li class="story lodge">
                <div class="inner">
                  <div class="story-head">
                    <div class="location">
                      <h5>Location Name</h5>
                      <p>Some Country</p>
                    </div>
                    <div class="dated">
                      <span class="opened">Date</span>
                      <span class="date">
                        <span>July</span>
                        <span>
                          19 <br />
                          93
                        </span>
                      </span>
                    </div>
                  </div>

                  <div class="story-img">
                    <img src="https://picsum.photos/200/300?random=1" alt="Featured" class="lazyload visi" />
                  </div>

                  <div class="excerpt">
                    Lorem ipsum dolor sit amet consectetur adipisicing elit. Maxime nihil tempora fugiat rem impedit vero. Ipsum, blanditiis molestiae voluptatibus est, porro nisi facilis quo eaque ipsa non laboriosam cum iste.
                  </div>
                </div>
              </li>

              <li class="story lodge">
                <div class="inner">
                  <div class="story-head">
                    <div class="location">
                      <h5>Location Name</h5>
                      <p>Country</p>
                    </div>
                    <div class="dated">
                      <span class="opened">Date</span>
                      <span class="date">
                        <span>July</span>
                        <span>
                          19 <br />
                          93
                        </span>
                      </span>
                    </div>
                  </div>

                  <div class="story-img">
                    <img src="https://picsum.photos/200/300?random=1" alt="Featured" class="lazyload visi" />
                  </div>

                  <div class="excerpt">
                    Lorem ipsum dolor sit amet consectetur adipisicing elit. Maxime nihil tempora fugiat rem impedit vero. Ipsum, blanditiis molestiae voluptatibus est, porro nisi facilis quo eaque ipsa non laboriosam cum iste.
                  </div>
                </div>
              </li>

              <li class="story">
                <a href="#" class="story-link modal-btn" data-target="story-1">
                  <span class="story-date">
                    12 Jul 1993
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>

              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1993
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>

              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1993
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Blake</span>
                    <span>Some Lodge</span>
                  </div>
                </a>
              </li>

              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1993
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>

              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1993
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>

              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1993
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>

              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1993
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>

              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1993
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                </a>
              </li>
            </ul>
          </li>

          <li class="year" id="1994">
            <h3>1994</h3>
            <ul class="stories">
              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1994
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>

              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1994
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>
            </ul>
          </li>

          <li class="year" id="1995">
            <h3>1995</h3>
            <ul class="stories has-lodge">
              <li class="story lodge">
                <div class="inner">
                  <div class="story-head">
                    <div class="location">
                      <h5>Location Name</h5>
                      <p>Some area</p>
                    </div>
                    <div class="dated">
                      <span class="opened">Date</span>
                      <span class="date">
                        <span>July</span>
                        <span>
                          19 <br />
                          95
                        </span>
                      </span>
                    </div>
                  </div>

                  <div class="story-img">
                    <img src="https://picsum.photos/200/300?random=1" alt="Featured" class="lazyload visi" />
                  </div>

                  <div class="excerpt">
                    Lorem ipsum dolor sit amet consectetur adipisicing elit. Maxime nihil tempora fugiat rem impedit vero. Ipsum, blanditiis molestiae voluptatibus est, porro nisi facilis quo eaque ipsa non laboriosam cum iste.
                  </div>
                </div>
              </li>
              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1995
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>

              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1995
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>
            </ul>
          </li>

          <li class="year" id="1996">
            <h3>1996</h3>
            <ul class="stories has-lodge">
              <li class="story lodge">
                <div class="inner">
                  <div class="story-head">
                    <div class="location">
                      <h5>Location Name</h5>
                      <p>Some area</p>
                    </div>
                    <div class="dated">
                      <span class="opened">Date</span>
                      <span class="date">
                        <span>July</span>
                        <span>
                          19 <br />
                          95
                        </span>
                      </span>
                    </div>
                  </div>

                  <div class="story-img">
                    <img src="https://picsum.photos/200/300?random=1" alt="Featured" class="lazyload visi" />
                  </div>

                  <div class="excerpt">
                    Lorem ipsum dolor sit amet consectetur adipisicing elit. Maxime nihil tempora fugiat rem impedit vero. Ipsum, blanditiis molestiae voluptatibus est, porro nisi facilis quo eaque ipsa non laboriosam cum iste.
                  </div>
                </div>
              </li>
              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1995
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>

              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1995
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>
            </ul>
          </li>

          <li class="year" id="2000">
            <h3>2000</h3>
            <ul class="stories has-lodge">
              <li class="story lodge">
                <div class="inner">
                  <div class="story-head">
                    <div class="location">
                      <h5>Location Name</h5>
                      <p>Some area</p>
                    </div>
                    <div class="dated">
                      <span class="opened">Date</span>
                      <span class="date">
                        <span>July</span>
                        <span>
                          19 <br />
                          95
                        </span>
                      </span>
                    </div>
                  </div>

                  <div class="story-img">
                    <img src="https://picsum.photos/200/300?random=1" alt="Featured" class="lazyload visi" />
                  </div>

                  <div class="excerpt">
                    Lorem ipsum dolor sit amet consectetur adipisicing elit. Maxime nihil tempora fugiat rem impedit vero. Ipsum, blanditiis molestiae voluptatibus est, porro nisi facilis quo eaque ipsa non laboriosam cum iste.
                  </div>
                </div>
              </li>
              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1995
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>

              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1995
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>
            </ul>
          </li>

          <li class="year" id="2003">
            <h3>2003</h3>
            <ul class="stories has-lodge">
              <li class="story lodge">
                <div class="inner">
                  <div class="story-head">
                    <div class="location">
                      <h5>Location Name</h5>
                      <p>Some area</p>
                    </div>
                    <div class="dated">
                      <span class="opened">Date</span>
                      <span class="date">
                        <span>July</span>
                        <span>
                          19 <br />
                          95
                        </span>
                      </span>
                    </div>
                  </div>

                  <div class="story-img">
                    <img src="https://picsum.photos/200/300?random=1" alt="Featured" class="lazyload visi" />
                  </div>

                  <div class="excerpt">
                    Lorem ipsum dolor sit amet consectetur adipisicing elit. Maxime nihil tempora fugiat rem impedit vero. Ipsum, blanditiis molestiae voluptatibus est, porro nisi facilis quo eaque ipsa non laboriosam cum iste.
                  </div>
                </div>
              </li>
              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1995
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>

              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1995
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>
            </ul>
          </li>

          <li class="year" id="2010">
            <h3>2010</h3>
            <ul class="stories has-lodge">
              <li class="story lodge">
                <div class="inner">
                  <div class="story-head">
                    <div class="location">
                      <h5>Location Name</h5>
                      <p>Some area</p>
                    </div>
                    <div class="dated">
                      <span class="opened">Date</span>
                      <span class="date">
                        <span>July</span>
                        <span>
                          19 <br />
                          95
                        </span>
                      </span>
                    </div>
                  </div>

                  <div class="story-img">
                    <img src="https://picsum.photos/200/300?random=1" alt="Featured" class="lazyload visi" />
                  </div>

                  <div class="excerpt">
                    Lorem ipsum dolor sit amet consectetur adipisicing elit. Maxime nihil tempora fugiat rem impedit vero. Ipsum, blanditiis molestiae voluptatibus est, porro nisi facilis quo eaque ipsa non laboriosam cum iste.
                  </div>
                </div>
              </li>
              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1995
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>

              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1995
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>
            </ul>
          </li>

          <li class="year" id="2013">
            <h3>2013</h3>
            <ul class="stories has-lodge">
              <li class="story lodge">
                <div class="inner">
                  <div class="story-head">
                    <div class="location">
                      <h5>Location Name</h5>
                      <p>Some area</p>
                    </div>
                    <div class="dated">
                      <span class="opened">Date</span>
                      <span class="date">
                        <span>July</span>
                        <span>
                          19 <br />
                          95
                        </span>
                      </span>
                    </div>
                  </div>

                  <div class="story-img">
                    <img src="https://picsum.photos/200/300?random=1" alt="Featured" class="lazyload visi" />
                  </div>

                  <div class="excerpt">
                    Lorem ipsum dolor sit amet consectetur adipisicing elit. Maxime nihil tempora fugiat rem impedit vero. Ipsum, blanditiis molestiae voluptatibus est, porro nisi facilis quo eaque ipsa non laboriosam cum iste.
                  </div>
                </div>
              </li>
              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1995
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>

              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1995
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>
            </ul>
          </li>

          <li class="year" id="2020">
            <h3>2020</h3>
            <ul class="stories has-lodge">
              <li class="story lodge">
                <div class="inner">
                  <div class="story-head">
                    <div class="location">
                      <h5>Location Name</h5>
                      <p>Some area</p>
                    </div>
                    <div class="dated">
                      <span class="opened">Date</span>
                      <span class="date">
                        <span>July</span>
                        <span>
                          19 <br />
                          95
                        </span>
                      </span>
                    </div>
                  </div>

                  <div class="story-img">
                    <img src="https://picsum.photos/200/300?random=1" alt="Featured" class="lazyload visi" />
                  </div>

                  <div class="excerpt">
                    Lorem ipsum dolor sit amet consectetur adipisicing elit. Maxime nihil tempora fugiat rem impedit vero. Ipsum, blanditiis molestiae voluptatibus est, porro nisi facilis quo eaque ipsa non laboriosam cum iste.
                  </div>
                </div>
              </li>
              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1995
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>

              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1995
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>
            </ul>
          </li>

          <li class="year" id="2022">
            <h3>2022</h3>
            <ul class="stories has-lodge">
              <li class="story lodge">
                <div class="inner">
                  <div class="story-head">
                    <div class="location">
                      <h5>Location Name</h5>
                      <p>Some area</p>
                    </div>
                    <div class="dated">
                      <span class="opened">Date</span>
                      <span class="date">
                        <span>July</span>
                        <span>
                          19 <br />
                          95
                        </span>
                      </span>
                    </div>
                  </div>

                  <div class="story-img">
                    <img src="https://picsum.photos/200/300?random=1" alt="Featured" class="lazyload visi" />
                  </div>

                  <div class="excerpt">
                    Lorem ipsum dolor sit amet consectetur adipisicing elit. Maxime nihil tempora fugiat rem impedit vero. Ipsum, blanditiis molestiae voluptatibus est, porro nisi facilis quo eaque ipsa non laboriosam cum iste.
                  </div>
                </div>
              </li>
              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1995
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>

              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1995
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>
            </ul>
          </li>

          <li class="year" id="2023">
            <h3>2023</h3>
            <ul class="stories">
              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1995
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>

              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1995
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>

              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1995
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>

              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1995
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>

              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1995
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>

              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1995
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>

              <li class="story">
                <a href="#" class="story-link">
                  <span class="story-date">
                    18 Jul 1995
                  </span>
                  <div class="story-img image-ratio" style="padding-bottom: 40%">
                    <img src="https://picsum.photos/200/300?random=1" alt="" class="lazyload visi" />
                  </div>
                  <div class="story-auth">
                    <span>Joe</span>
                    <span>Some Lodge</span>
                  </div>
                  <div class="story-excerpt">
                    Lorem ipsum dolor sit amet, consectetur
                    adipiscing elit, sed do labore et dolore
                    magna aliqua. Ut enim ad minim veniam,
                    quis nostrud exercitation ullamco.
                  </div>
                </a>
              </li>
            </ul>
          </li>
        </ul>

        <div class="story-tail">
          <h2>Pioneering spirit, enduring purpose</h2>
          <p>
            As we look to the next 30 years of our conservation
            journey, Lorem ipsum donor sit amet, consectetur
            adipiscing elit, sed do eiusmod tempor incididunt ut
            labore et dolore magna aliqua.
          </p>
        </div>
      </section>
    </div>

    <div class="proxy"></div>
  </div>
</div>
!

CSS 

              
                *,
::after,
::before {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  max-height: 100vh;
  scrollbar-width: none;
  &::-webkit-scrollbar {
    display: none;
  }
}

body {
  font-size: 16px;
  line-height: 1.2;
  background-color: #4d4945;
  color: #f6f4f0;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  transition: color 0.3s;
  color: #ede9e1;
}

.container {
  background-image: url("../images/dark-background.jpg");
  background-repeat: repeat;
  background-size: cover;
  background-position: center;
  background-color: #4d4945;
  overscroll-behavior: none;
  height: 100%;
  max-width: fit-content;
  display: flex;
  flex-wrap: nowrap;
  overflow-y: hidden;
}

.overlay {
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 3;
  &.show {
    display: block;
  }
  &.dark {
    background-image: url("../images/dark-bg.svg");
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
  }
  &.preview {
    background-color: rgba(77, 73, 69, 0.49);
  }
}

.eyebrow {
  opacity: 0;
}

.content {
  position: relative;
  padding: 2rem;
}

.content-fade-in {
  opacity: 0;
}

.panel {
  position: relative;
  display: flex;
  align-items: center;
  color: #ede9e1;
  padding: 110px 0 0;
  font-weight: 300;
  min-width: fit-content;
  height: 100vh;
  background-color: #4d4945;
  &.intro {
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    min-width: 100vw;
    max-width: 100vw;
    flex-direction: column;
    h1 {
      color: #ede9e1;
      font-size: clamp(30px, 5vw, 90px);
      margin: 0 0 1rem;
      line-height: 1;
    }
    p {
      font-size: 16px;
    }
    .button {
      margin: 1rem 0 0;
    }
    .button-round {
      position: relative;
      bottom: 1rem;
    }
  }
  &.story-board {
    padding: 110px 200px 0 0;
    .button-round {
      pointer-events: visible;
      right: 50%;
      bottom: 50%;
    }
  }
}

.years {
  list-style: none;
  display: flex;
  align-items: center;
  width: 100%;
  margin: 0;
  padding: 0;
  padding: 0 220px 0 0;
  border-left: 1px solid #d69677;
  border-right: 1px solid #d69677;
}

.year {
  position: relative;
  display: flex;
  align-items: center;
  padding: 0 110px;
  &.selected {
    h3 {
      height: 125px;
    }
  }
  h3 {
    position: relative;
    margin: 0;
    color: #f6f4f0;
    font-size: clamp(18px, 1.5vw, 26px);
    display: flex;
    justify-content: center;
    align-items: center;
    width: 95px;
    height: 0;
    overflow: hidden;
    border-top: 3px solid #ede9e1;
    border-bottom: 3px solid #ede9e1;
    transition: height 0.5s;
    &::before,
    &::after {
      content: "";
      display: block;
      position: absolute;
      width: 2px;
      height: 200%;
      background-color: #3c3a37;
      left: calc(50% - 1px);
      z-index: -1;
    }
    &::before {
      top: calc(-200% - 2rem);
    }
    &::after {
      bottom: calc(-200% - 2rem);
    }
  }
  &::before {
    content: "";
    display: block;
    position: absolute;
    z-index: -1;
    bottom: calc(50% + 1px);
    transform: translateY(50%);
    width: 110px;
    left: 0;
    height: 2px;
    background-image: linear-gradient(
      to right,
      #ede9e1 40%,
      rgba(255, 255, 255, 0) 0%
    );
    background-position: top;
    background-size: 10px 2px;
    background-repeat: repeat-x;
  }
  &:last-child {
    .story {
      &::after {
        width: calc(100% + 320px);
      }
    }
  }
}

.stories {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: flex;
  align-items: center;
  &::before {
    content: "";
    display: block;
    position: absolute;
    z-index: -1;
    bottom: 50%;
    transform: translateY(50%);
    width: 100px;
    left: 0;
    height: 2px;
    background-image: linear-gradient(
      to right,
      #ede9e1 40%,
      rgba(255, 255, 255, 0) 0%
    );
    background-position: top;
    background-size: 10px 2px;
    background-repeat: repeat-x;
  }
}

.story {
  position: relative;
  margin-left: 120px;
  min-width: 50px;
  max-width: 350px;
  opacity: 0;
  transition: opacity 0.5s;
  &.selected {
    opacity: 1;
    .story-link {
      transform: scaleY(1);
    }
    &::before {
      transform: translateY(-50%) scale(1);
    }
  }
  &.lodge {
    min-width: 350px;
    transition: opacity 1s;

    .inner {
      background-color: #3c3a37;
      &::before {
        content: "";
        display: block;
        position: absolute;
        z-index: -1;
        background-color: #3c3a37;
        height: 100%;
        width: 100%;
        top: 100%;
        left: 0;
      }
      .story-head {
        position: relative;
        padding: 1rem;
        display: flex;
        justify-content: space-between;
        p {
          margin: 0;
        }
      }
      .location {
        max-width: 70%;
      }
      .opened {
        position: absolute;
        right: 50%;
        bottom: 30%;
        display: inline-block;
        transform: rotate(-90deg);
        font-size: clamp(18px, 1.5vw, 22px);
        font-style: italic;
        text-transform: uppercase;
      }
      .dated {
        position: relative;
        height: 100%;
        margin-top: auto;
      }
      .date {
        display: block;
        span {
          display: block;
          line-height: 1;
          &:first-child {
            font-size: clamp(17px, 1.5vw, 23px);
          }
          &:last-child {
            font-size: clamp(20px, 2vw, 30px);
          }
        }
      }
      h5 {
        font-size: clamp(18px, 2vw, 30px);
        margin: 0 0 0.5rem;
        max-width: 8ch;
      }
      .location {
        display: block;
        font-size: 17px;
        color: #d69677;
      }
      .story-img {
        padding: 0 !important;
        img {
          max-width: 50%;
          margin: 0 auto;
        }
      }
      .excerpt {
        padding: 1rem;
      }
    }
  }
  &::after {
    content: "";
    display: block;
    position: absolute;
    z-index: -1;
    bottom: 50%;
    width: calc(100% + 100px);
    left: 9px;
    height: 2px;
    background-image: linear-gradient(
      to right,
      #ede9e1 40%,
      rgba(255, 255, 255, 0) 0%
    );
    background-position: top;
    background-size: 10px 2px;
    background-repeat: repeat-x;
  }
  &::before {
    content: "";
    display: block;
    position: absolute;
    left: -10px;
    top: 50%;
    width: 18px;
    height: 18px;
    background-color: #f6f4f0;
    transform: translateY(-50%) scale(0);
    transform-origin: center;
    will-change: transform;
    transition: transform 0.5s, background 0.5s;
  }
  &:hover {
    &::before {
      transform: translateY(-50%) scale(1.3);
      background-color: #d69677;
    }
  }
}

.story-link {
  display: flex;
  flex-direction: column;
  width: 250px;
  font-size: 14px;
  margin: 0 0px 33px -11px;
  transform: scaleY(0);
  will-change: transform;
  transition: transform 1s;
  &::before {
    content: "";
    display: block;
    position: absolute;
    left: 10px;
    top: 47px;
    width: 1px;
    height: calc(100% - 16px);
    background-color: #ede9e1;
  }
  &:hover {
    .story-img {
      img,
      video {
        transform: scale(1.1);
      }
    }
  }
}

.story-date {
  order: 1;
  color: #d69677;
  font-size: 18px;
  padding: 0.25rem 0;
  max-height: 32px;
  max-width: fit-content;
  border-top: 1px solid #d69677;
  border-bottom: 1px solid #d69677;
}

.story-img {
  order: 2;
  margin: 15px 0 0 30px;
  img,
  video {
    pointer-events: none;
    max-width: 120px;
    transition: transform 0.5s;
  }
}

.story-auth {
  order: 3;
  padding: 0 0 0 30px;
  span {
    color: #f6f4f0;
    display: block;
    line-height: 1.2;
    &:last-child {
      color: #d69677;
    }
  }
}

.story-excerpt {
  order: 4;
  padding: 10px 0 0 30px;
}

.box {
  width: 100px;
  height: 80px;
  text-align: center;
  line-height: 80px;
  background-color: white;
  border-radius: 8px;
  color: #222;
  font-weight: 700;
  margin-left: 20px;
  will-change: transform;
}

.box.active {
  background-color: orange;
  border: 2px solid white;
}

.story-tail {
  padding: 0 0 0 60px;
  min-width: 32vw;
  h2 {
    font-size: clamp(38px, 4vw, 68px);
    max-width: 15ch;
  }
  p {
    font-size: clamp(18px, 1.5vw, 25px);

    max-width: 35ch;
  }
}

.timeline {
  position: relative;
  z-index: 5;
  overflow: hidden;
  width: 100%;
  &::after {
    content: "";
    position: absolute;
    bottom: 50%;
    transform: translateY(50%);
    left: 0;
    width: 100%;
    height: 0.25rem;
    background: #3c3a37;
    pointer-events: none;
    z-index: -1;
  }
}

.timeline-list {
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 0;
  padding: 0;
  height: 100%;
}

.timeline-marker {
  position: fixed;
  bottom: 20px;
  left: 300px;
  width: 10px;
  height: 10px;
  transform: translate3d(-50%, -50%, 0);
  background: #d69677;
  border-radius: 100%;
  z-index: 3;
  &::before {
    content: "";
    position: absolute;
    top: calc(50% - 0.2rem);
    right: 100%;
    width: 100px;
    height: 5px;
    background-color: #d69677;
    z-index: -1;
  }
}

.line {
  width: 100%;
  max-width: 800px;
  height: 8px;
  margin: 0 0 10px 0;
  position: relative;
  display: inline-block;
  background-color: rgba(255, 255, 255, 1);
}

@media screen and (min-width: 640px) {
  .panel {
    padding: 100px 0;
    &.intro {
      justify-content: center;
      flex-direction: row;
      h1 {
        max-width: 12ch;
      }
      p {
        max-width: 75ch;
      }
    }
    &.story-board {
      padding: 100px 100px 0 0;
    }
  }
  .story {
    &.lodge {
      .inner {
        .story-head {
          p {
            max-width: 10ch;
          }
        }
        .story-img {
          img {
            max-width: 100%;
            margin: 0 0 0 auto;
          }
        }
      }
    }
    &:not(.lodge) {
      .story-img {
        margin: 8px 0 8px 30px;
      }
    }
  }
  .container {
    overflow-y: unset;
  }
  .stories {
    .story {
      &:nth-child(even) {
        .story-link {
          bottom: 50px;
          top: unset;
          transform-origin: bottom;
          &::before {
            top: 40px;
            bottom: unset;
          }
        }
        .story-date {
          order: 1;
        }
        .story-img {
          order: 2;
        }
        .story-auth {
          order: 3;
        }
        .story-excerpt {
          order: 4;
        }
      }
      &:nth-child(odd) {
        .story-link {
          top: 50px;
          bottom: unset;
          transform-origin: top;
          &::before {
            top: -24px;
            bottom: unset;
          }
        }
        .story-excerpt {
          order: 1;
          padding: 0 0 0 30px;
        }
        .story-auth {
          order: 2;
          padding: 10px 0 0 30px;
        }
        .story-img {
          order: 3;
        }
        .story-date {
          order: 4;
        }
      }
      // &:nth-child(4n) {
      //     .story-link {
      //         bottom: 130px;
      //         &::before {
      //             height: calc(100% + 55px);
      //         }
      //     }
      // }
      &:nth-child(4n + 1) {
        .story-link {
          top: 120px;
          &::before {
            height: calc(100% + 55px);
            top: -95px;
          }
        }
      }
    }
    &:not(.has-lodge) {
      .story {
        .story-img {
          margin: 8px 0 8px 30px;
        }
        &:nth-child(odd) {
          .story-link {
            bottom: 50px;
            top: unset;
            transform-origin: bottom;
            &::before {
              top: 47px;
              height: calc(100% - 25px);
            }
          }
          .story-excerpt {
            order: 4;
            padding: 0 0 0 30px;
          }
          .story-auth {
            order: 3;
            padding: 10px 0 0 30px;
          }
          .story-img {
            order: 2;
          }
          .story-date {
            order: 1;
          }
        }
        &:nth-child(even) {
          .story-link {
            top: 50px;
            bottom: unset;
            transform-origin: top;
            &::before {
              top: -24px;
              bottom: unset;
            }
          }
          .story-excerpt {
            order: 1;
            padding: 0 0 0 30px;
          }
          .story-auth {
            order: 2;
            padding: 10px 0 0 30px;
          }
          .story-img {
            order: 3;
          }
          .story-date {
            order: 4;
          }
        }
      }
    }
  }
  .story-link {
    position: absolute;
    left: -10px;
    z-index: 100;
    margin: 0;
  }
}

@media screen and (min-width: 1024px) {
  .content {
    padding: 0 100px 0 0;
  }
  .story {
    &.lodge {
      .inner {
        .story-head {
          padding: 4rem 1rem 2rem;
        }
      }
    }
  }
}

@media screen and (min-width: 1280px) {
  .panel {
    &.intro {
      .button-round {
        position: absolute;
        right: 10%;
        bottom: 50%;
        transform: translateY(50%);
        transition: right 0.3s;
        &:hover {
          right: calc(10% - 20px);
        }
      }
    }
  }
}
!

JS 

              
                // gsap.to()... infinity and beyond!
// For more check out greensock.com

document.addEventListener("DOMContentLoaded", () => {
  function storyTimeline() {
    gsap.registerPlugin(
      ScrollTrigger,
      Draggable,
      ScrollSmoother,
      ScrollToPlugin
    );

    const introPanel = document.querySelector(".panel.intro");
    if (introPanel) {
      gsap.to(".content-fade-in", {
        duration: 1,
        opacity: 1,
        stagger: 1
      });
    }

    const panelsContainer = document.querySelector(".container");
    if (panelsContainer) {
      const sections = gsap.utils.toArray(".panel");
      let maxWidth = 0;

      const getMaxWidth = () => {
        maxWidth = 0;
        sections.forEach((section) => {
          maxWidth += section.offsetWidth;
        });
      };
      getMaxWidth();
      ScrollTrigger.addEventListener("refreshInit", getMaxWidth);

      let scrollTween = gsap.to(sections, {
        x: () => `-${maxWidth - window.innerWidth}`,
        ease: "none"
      });

      let horizontalScroll = ScrollTrigger.create({
        animation: scrollTween,
        trigger: panelsContainer,
        pin: true,
        scrub: true,
        end: () => `+=${maxWidth}`,
        invalidateOnRefresh: true
      });

      //sections.forEach((sct, i) => {
      //  ScrollTrigger.create({
      //	trigger: sct,
      //	start: () => 'top top-=' + (sct.offsetLeft - window.innerWidth/2) * (maxWidth / (maxWidth - window.innerWidth)),
      //	end: () => '+=' + sct.offsetWidth * (maxWidth / (maxWidth - window.innerWidth)),
      //	toggleClass: {targets: sct, className: "active"}
      //  });
      //});

      // dragRatio changed to the part in the horizontal sroll that's there to calculate the offset between the duration of the scroll and the amount of x-translation of the content (that needs to be included there when triggering things when certain sections reach a certain point in the viewport - as seen in commented out part above)

      var dragRatio = maxWidth / (maxWidth - window.innerWidth);

      var drag = Draggable.create(".proxy", {
        trigger: panelsContainer,
        type: "x",
        allowContextMenu: true,
        onPress() {
          this.startScroll = horizontalScroll.scroll();
        },
        onDrag() {
          horizontalScroll.scroll(
            this.startScroll - (this.x - this.startX) * dragRatio
          );
        }
      })[0];

      let storyLinks = document.querySelectorAll(".story");
      let years = document.querySelectorAll(".year");

      years.forEach((year) => {
        ScrollTrigger.create({
          trigger: year,
          containerAnimation: scrollTween,
          onEnter: () => year.classList.add("selected"),
          start: "left 90%",
          ease: "none"
        });
      });

      storyLinks.forEach((storyLink) => {
        ScrollTrigger.create({
          trigger: storyLink,
          containerAnimation: scrollTween,
          onEnter: () => storyLink.classList.add("selected"),
          start: "left 80%",
          ease: "none"
        });
      });

      gsap.to(".navbar .button", {
        opacity: 1,
        pointerEvents: "visible",
        duration: 1,
        ease: "none",
        scrollTrigger: {
          trigger: ".panel.story-board",
          containerAnimation: scrollTween,
          start: "left center",
          toggleActions: "play none none reset"
        }
      });

      /* Main navigation */

      document.querySelectorAll(".button-round").forEach((anchor) => {
        anchor.addEventListener("click", function (e) {
          e.preventDefault();
          let targetElem = document.querySelector(
              e.target.getAttribute("href")
            ),
            y = targetElem;
          if (
            targetElem &&
            panelsContainer.isSameNode(targetElem.parentElement)
          ) {
            let totalScroll =
                scrollTween.scrollTrigger.end - scrollTween.scrollTrigger.start,
              totalMovement = (sections.length - 1) * targetElem.offsetWidth;
            y = Math.round(
              scrollTween.scrollTrigger.start +
                (targetElem.offsetLeft / totalMovement) * totalScroll
            );
          }
          gsap.to(window, {
            scrollTo: {
              y: y,
              autoKill: false
            },
            duration: 1
          });
        });
      });
    }
  }

  storyTimeline();
});
!
999px

Console