Wheel Timeline - pure CSS

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<div class="cards-container">
        <ul class="cards" style="--items: 26;">
            <li style="--i: 0;">
                <input type="radio" id="item-0" name="gallery-item" checked>
                <label for="item-0">2000</label>
                <h2>2000</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            </li>
            <li style="--i: 1;">
                <input type="radio" id="item-1" name="gallery-item">
                <label for="item-1">2001</label>
                <h2>2001</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            </li>
            <li style="--i: 2;">
                <input type="radio" id="item-2" name="gallery-item">
                <label for="item-2">2002</label>
                <h2>2002</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            </li>
            <li style="--i: 3;">
                <input type="radio" id="item-3" name="gallery-item">
                <label for="item-3">2003</label>
                <h2>2003</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            </li>
            <li style="--i: 4;">
                <input type="radio" id="item-4" name="gallery-item">
                <label for="item-4">2004</label>
                <h2>2004</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            <li style="--i: 5;">
                <input type="radio" id="item-5" name="gallery-item">
                <label for="item-5">2005</label>
                <h2>2005</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            <li style="--i: 6;">
                <input type="radio" id="item-6" name="gallery-item">
                <label for="item-6">2006</label>
                <h2>2006</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            <li style="--i: 7;">
                <input type="radio" id="item-7" name="gallery-item">
                <label for="item-7">2007</label>
                <h2>2007</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            </li>
            <li style="--i: 8;">
                <input type="radio" id="item-8" name="gallery-item">
                <label for="item-8">2008</label>
                <h2>2008</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            <li style="--i: 9;">
                <input type="radio" id="item-9" name="gallery-item">
                <label for="item-9">2009</label>
                <h2>2009</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            </li>
            <li style="--i: 10;">
                <input type="radio" id="item-10" name="gallery-item">
                <label for="item-10">2010</label>
                <h2>2010</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            <li style="--i: 11;">
                <input type="radio" id="item-11" name="gallery-item">
                <label for="item-11">2011</label>
                <h2>2011</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            </li>
            <li style="--i: 12;">
                <input type="radio" id="item-12" name="gallery-item">
                <label for="item-12">2012</label>
                <h2>2012</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            </li>
            <li style="--i: 13;">
                <input type="radio" id="item-13" name="gallery-item">
                <label for="item-13">2013</label>
                <h2>2013</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            </li>
            <li style="--i: 14;">
                <input type="radio" id="item-14" name="gallery-item">
                <label for="item-14">2014</label>
                <h2>2014</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            </li>
            <li style="--i: 15;">
                <input type="radio" id="item-15" name="gallery-item">
                <label for="item-15">2015</label>
                <h2>2015</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            </li>
            <li style="--i: 16;">
                <input type="radio" id="item-16" name="gallery-item">
                <label for="item-16">2016</label>
                <h2>2016</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            </li>
            <li style="--i: 17;">
                <input type="radio" id="item-17" name="gallery-item">
                <label for="item-17">2017</label>
                <h2>2017</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            </li>
            <li style="--i: 18;">
                <input type="radio" id="item-18" name="gallery-item">
                <label for="item-18">2018</label>
                <h2>2018</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            </li>
            <li style="--i: 19;">
                <input type="radio" id="item-19" name="gallery-item">
                <label for="item-19">2019</label>
                <h2>2019</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            </li>
            <li style="--i: 20;">
                <input type="radio" id="item-20" name="gallery-item">
                <label for="item-20">2020</label>
                <h2>2020</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            </li>
            <li style="--i: 21;">
                <input type="radio" id="item-21" name="gallery-item">
                <label for="item-21">2021</label>
                <h2>2021</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            </li>
            <li style="--i: 22;">
                <input type="radio" id="item-22" name="gallery-item">
                <label for="item-22">2022</label>
                <h2>2022</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            </li>
            <li style="--i: 23;">
                <input type="radio" id="item-23" name="gallery-item">
                <label for="item-23">2023</label>
                <h2>2023</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            </li>
            <li style="--i: 24;">
                <input type="radio" id="item-24" name="gallery-item">
                <label for="item-24">2024</label>
                <h2>2024</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            </li>
            <li style="--i: 25;">
                <input type="radio" id="item-25" name="gallery-item">
                <label for="item-25">2025</label>
                <h2>2025</h2>
                <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Molestias, perspiciatis dicta? In nihil quidem sunt omnis facilis quas corporis at, officia itaque!</p>
            </li>
        </ul>
  </div>

CSS

@import "https://codepen.io/cbolson/pen/rNEdgKo.css" layer(template);
@layer template, demo;

@layer demo {
  /* Hide radio buttons */
  input[type="radio"] {
      position: absolute;
      width: 1px;
      height: 1px;
      padding: 0;
      margin: -1px;
      overflow: hidden;
      clip: rect(0, 0, 0, 0);
      white-space: nowrap;
      border-width: 0;
  }
  .cards-container {
    --base-rotation: 0deg;
    --full-circle: 360deg;
    --radius: 40vw;
    --duration: 200ms;

--cards-container-size: calc(var(--radius) * 2);
    --cards-container-padding: 2rem;

--border-color: transparent;

--label-offset: calc(var(--radius) * -1 - 1rem);
    --label-size: 30px;
    --label-color: #666;
    --label-color-hover: steelblue;
    --label-line-h: 0;
    --label-line-h-current: 2rem;
    --label-dot-size: 10px;

--title-top: 1.5rem;
    --title-offset-y: 30px;

--info-top: 5rem;
    --info-width: 80%;
    --info-offset-y: 30px;

box-sizing: content-box;
    position: fixed;
    inset: 0;
    margin: auto;
    width: var(--cards-container-size);
    height: var(--cards-container-size);

padding: var(--cards-container-padding);
    clip-path: polygon(0 0, 100% 0, 100% 50%, 0 50%);
  }
  @media (min-width: 800px) {
    .cards-container {
      --radius: 30vw;
      --label-size: 40px;
      --label-dot-size: 15px;
      --label-line-h-current: 4rem;
      --title-top: 4rem;
      --info-top: 8rem;
    }
  }
  @media (min-width: 1200px) {
    .cards-container {

--label-size: 50px;
      --border-color: var(--label-color);
      --info-width: min(100% - 2rem, 65%);

}
  }
  .cards {
    position: absolute;
    inset: var(--cards-container-padding);
    aspect-ratio: 1;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease-in-out var(--duration);
    list-style: none;
  }

.cards li {
    position: absolute;
    inset: 0;
    margin: 0;
    padding: 0;
    transform-origin:center;
    display: grid;
    place-content: center;
    transform: rotate(calc(var(--i) * 360deg / var(--items)));
    pointer-events: none;
  }

.cards li > label {
    position: absolute;
    inset: 0;
    margin: auto;
    transform: translateY(var(--label-offset));
    width: var(--label-size);
    height: var(--label-size);
    cursor: pointer;
    pointer-events: initial;
    text-align: center;
    color: var(--label-color);
    transition: var(--duration) ease-in-out;

}
  .cards li > label::before{
      content: '';
      position: absolute;
      top: var(--cards-container-padding);
      left: 50%;
      translate: -50% 0;
      width: var(--label-dot-size);
      height: var(--label-dot-size);
      aspect-ratio: 50%;
      border-radius: 50%;
      background-color: var(--label-color);
      transition: background-color var(--duration) ease-in-out;
  }

.cards li > label::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    translate: -50% 5px;
    width: 2px;
    height: var(--label-line-h);
    background-color: steelblue;
    transition: height 300ms ease-in-out var(--label-line-delay,0ms);
  }
  .cards li > label:hover{
    --label-color: var(--label-color-hover);
  }

.cards > li > h2,
  .cards > li > p{
    position: absolute;
    left: 50%;
    text-align: center;
    transform: translate(-50%, 0);
    transform-origin: center;
  }
  .cards > li > h2{
    top: var(--title-top);
    opacity: var(--title-opacity,0);
    translate: 0 var(--title-offset-y);
    transition: var(--duration) ease-in-out var(--title-delay,0ms);
  }
  .cards > li > p{
    top: var(--info-top);
    margin: 0 auto;
    width: var(--info-width);
    z-index: 2;
    font-size: clamp(.8rem, 2.5vw + 0.05rem, .9rem);
    text-wrap: balance;
    opacity: var(--info-opacity,0);
    translate: 0 var( --info-offset-y);
    transition: var(--duration) ease-in-out var(--info-delay,0ms);
  }

/* update custom properties for checked item */
  li:has(input:checked){
      --label-opacity: 1;
      --label-color: var(--label-color-hover);
      --label-line-h: var(--label-line-h-current);
      --label-line-delay: calc(var(--duration) * 2);

--title-opacity: 1;
      --title-offset-y: 0;
      --title-delay: calc(var(--duration) * 3);

--info-opacity: 1;
      --info-offset-y: 0;
      --info-delay: calc(var(--duration) * 4);
      /*outline: 1px dashed red;*/
  }

/* rotate container based on checked radio */
  .cards:has(input:checked) {
    transform: rotate(calc(var(--base-rotation) - (var(--index) * var(--full-circle) / var(--items))));
  }
  /*
  this would be so much simpler if we could use counter values as custom property values
  */
  .cards:has(li:nth-child(1)>input:checked) { --index: 0; }
  .cards:has(li:nth-child(2)>input:checked) { --index: 1; }
  .cards:has(li:nth-child(3)>input:checked) { --index: 2; }
  .cards:has(li:nth-child(4)>input:checked) { --index: 3; }
  .cards:has(li:nth-child(5)>input:checked) { --index: 4; }
  .cards:has(li:nth-child(6)>input:checked) { --index: 5; }
  .cards:has(li:nth-child(7)>input:checked) { --index: 6; }
  .cards:has(li:nth-child(8)>input:checked) { --index: 7; }
  .cards:has(li:nth-child(9)>input:checked) { --index: 8; }
  .cards:has(li:nth-child(10)>input:checked) { --index: 9; }
  .cards:has(li:nth-child(11)>input:checked) { --index: 10; }
  .cards:has(li:nth-child(12)>input:checked) { --index: 11; }
  .cards:has(li:nth-child(13)>input:checked) { --index: 12; }
  .cards:has(li:nth-child(14)>input:checked) { --index: 13; }
  .cards:has(li:nth-child(15)>input:checked) { --index: 14; }
  .cards:has(li:nth-child(16)>input:checked) { --index: 15; }
  .cards:has(li:nth-child(17)>input:checked) { --index: 16; }
  .cards:has(li:nth-child(18)>input:checked) { --index: 17; }
  .cards:has(li:nth-child(19)>input:checked) { --index: 18; }
  .cards:has(li:nth-child(20)>input:checked) { --index: 19; }
  .cards:has(li:nth-child(21)>input:checked) { --index: 20; }
  .cards:has(li:nth-child(22)>input:checked) { --index: 21; }
  .cards:has(li:nth-child(23)>input:checked) { --index: 22; }
  .cards:has(li:nth-child(24)>input:checked) { --index: 23; }
  .cards:has(li:nth-child(25)>input:checked) { --index: 24; }
  .cards:has(li:nth-child(26)>input:checked) { --index: 25; }
}

Wheel Timeline - pure CSS

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