<!-- for article: https://utilitybend.com/blog/love-at-first-slide-creating-a-carousel-purely-out-of-css -->
<div class="carousel">
  <div>
    <img src='https://images.unsplash.com/photo-1735437643865-18e22575a630?crop=entropy&cs=srgb&fm=jpg&ixid=M3wzMjM4NDZ8MHwxfHJhbmRvbXx8fHx8fHx8fDE3MzgyNTUzODd8&ixlib=rb-4.0.3&q=85' alt=''>
  </div>
  <div>
    <img src='https://images.unsplash.com/photo-1736604925910-a6ebc20ed892?crop=entropy&cs=srgb&fm=jpg&ixid=M3wzMjM4NDZ8MHwxfHJhbmRvbXx8fHx8fHx8fDE3MzgyNTUzODd8&ixlib=rb-4.0.3&q=85' alt=''>
  </div>
  <div>
    <img src='https://images.unsplash.com/photo-1732452792160-c28abdcd4b64?crop=entropy&cs=srgb&fm=jpg&ixid=M3wzMjM4NDZ8MHwxfHJhbmRvbXx8fHx8fHx8fDE3MzgyNTU0NDV8&ixlib=rb-4.0.3&q=85' alt=''>
  </div>
</div>

<!-- for demo purpose -->
<div class="warning">This is an experimental demo for scroll markers made in Chrome Canary, Your browser does not support scroll markers</div>

@layer base, carouselAndMarkers, carouselArrows;

@layer carouselAndMarkers {
  .carousel {
    display: grid;
    grid-auto-columns: 100%;
    grid-auto-flow: column;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
    max-inline-size: 1200px;
    margin: 0 auto;
    scroll-behavior: smooth;
    scroll-marker-group: after;
    &::scroll-marker-group {
      width: 100%;
      display: flex;
      gap: 12px;
      align-items: center;
      padding: 20px 0;
      justify-content: center;
      z-index: 20;
    }
    div {
      scroll-snap-stop: always;
      scroll-snap-align: start;
      &::scroll-marker {
        display: block;
        content: " ";
        aspect-ratio: 1;
        width: 24px;
        border-radius: 50%;
        border: 1px solid silver;
        cursor: pointer;
        background: transparent;
        justify-content: center;
        transition: background 0.5s ease-out;
      }
      &::scroll-marker:target-current {
        background: white;
      }
      &::scroll-marker:where(:hover, :active, :focus) {
        background: lightgray;
      }
    }
    img {
      width: 100%;
      aspect-ratio: 16/9;
      object-fit: cover;
    }
  }
}

@layer carouselArrows {
  .carousel {
    anchor-name: --carousel;
    &::scroll-button(inline-end),
    &::scroll-button(inline-start) {
      z-index: 1;
      cursor: pointer;
      position: absolute;
      position-anchor: --carousel;
      top: anchor(center);
      inset-inline: anchor(start) anchor(end);
      inline-size: 44px;
      aspect-ratio: 1;
      backdrop-filter: blur(5px);
      border: 1px solid silver;
      border-radius: 50%;
      line-height: 1;
      content: "";
      background-color: rgb(255 255 255 / 0.5);
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke-width='1.5' stroke='currentColor' class='size-6'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M15.75 19.5 8.25 12l7.5-7.5' /%3E%3C/svg%3E%0A");
      background-size: 24px 24px;
      background-repeat: no-repeat;
      background-position: center;
      translate: 20px -50%;
      transition: background-color 0.5s ease-out;
    }

    &::scroll-button(inline-end) {
      top: anchor(center);
      inset-inline: auto anchor(end);
      content: "";
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke-width='1.5' stroke='currentColor' class='size-6'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='m8.25 4.5 7.5 7.5-7.5 7.5' /%3E%3C/svg%3E%0A");
      translate: -20px -50%;
    }

    &::scroll-button(inline-end):where(:hover, :focus, :active),
    &::scroll-button(inline-start):where(:hover, :focus, :active) {
      background-color: rgb(255 255 255);
    }
  }
}

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

  body {
    background: linear-gradient(#555, #222);
    min-height: 100dvh;
    margin: 0;
    padding: 5vmin;
  }
}

.warning {
  background: #ffd503;
  font-family: Helvetica, Arial, sans-serif;
  position: fixed;
  top: 20px;
  left: 20px;
  padding: 20px;
  max-width: 500px;
  border-radius: 5px;
  z-index: 100;
}

@supports (scroll-marker-group: after) {
  .warning {
    display: none;
  }
}