<main>
  <h2>When the height exceeds 200px, it becomes an accordion.</h2>
  <div class="container">
    <div class="scroll-container">
      <p>
        Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's
        standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a
        type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting,
        remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing
        Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of
        Lorem Ipsum.
      </p>
      <label class="more" for="more">more<input type="checkbox" id="more" name="more" /></label>
    </div>
    <div class="hint">Resize</div>
  </div>
</main>
<style>
  main {
    padding: 1rem;
  }
  h2 {
    margin-bottom: 0.5rem;
  }
  p {
    font-size: 18px;
  }
  .container {
    position: relative;
    border: 1px dashed #aaa;
    border-radius: 8px;
    padding: 10px;
    width: 100%;
    height: 100%;
    resize: horizontal;
    overflow: hidden;
    anchor-name: --container;
  }

  .scroll-container {
    container-type: scroll-state;
    max-height: 200px;
    overflow: hidden;
    position: relative;
  }

  .scroll-container:after {
    content: '';
    position: absolute;
    bottom: 0;
    inset-inline: 0;
    display: block;
    width: 100%;
    height: 8em;

    @container scroll-state(scrollable: bottom) {
      background-image: linear-gradient(to bottom, transparent, white);
    }
  }

  .scroll-container:has(input:checked) {
    max-height: none;

    &:after {
      display: none;
    }

    .more {
      display: none;
    }
  }

  .more {
    display: none;
    width: 100px;
    position: absolute;
    bottom: 0.5rem;
    inset-inline: 0;
    margin-inline: auto;
    padding-block: 0.375rem;
    padding-inline: 0.625rem;
    font-size: 0.875rem;
    line-height: 1.25rem;
    font-weight: 600;
    color: #111827;
    background-color: #ffffff;
    cursor: pointer;
    border-radius: 9999px;
    border: 1px solid #363636;
    z-index: 1;

    &:hover {
      background-color: #F9FAFB;
    }

    @container scroll-state(scrollable: bottom) {
      display: block;
    }
  }
  label {
    text-align: center;
  }
  input {
    display: none;
  }
  .hint {
    position: fixed;
    position-anchor: --container;
    bottom: anchor(bottom);
    right: anchor(right);
    margin: 12px;
    background: #232323;
    color: white;
    padding: 0.5rem;
    border-radius: 12px;
    font-size: 0.875rem;
    opacity: 0.9;
    user-select: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  }

  .hint::before {
    content: '';
    position: absolute;
    bottom: -4px;
    right: -4px;
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 12px solid #232323;
    filter: drop-shadow(0 -2px 2px rgba(0, 0, 0, 0.1));
    rotate: -45deg;
  }
</style>