<main>
  <h2>Record Wall</h2>
  <div class="no-support" data-support="selector-nth-of-s"><p>Your browser does not support fine-grained <code>:nth-child()</code> selections. Please try Safari 9+ or Chrome 111+</p></div>
  <ul class="albums">
    <li class="sale"><img draggable="false" src="https://assets.codepen.io/89905/coverflow--Odd-World-EP-SMALL-1024x1024.png" width="1200" height="1200" /></li>
    <li class="highlight"><img draggable="false" src="https://assets.codepen.io/89905/coverflow--MURGE-ep-cvr-3000x3000-550x550.jpg" width="1200" height="1200" /></li>
    <li><img draggable="false" src="https://assets.codepen.io/89905/coverflow--Front-1024x1024.jpg" width="1200" height="1200" /></li>
    <li><img draggable="false" src="https://assets.codepen.io/89905/coverflow--Forest-Blue-Pre-LR-1024x1024.png" width="1200" height="1200" /></li>
    <li><img draggable="false" src="https://assets.codepen.io/89905/coverflow--Nature-Therapy-Pre-LR-550x550.png" width="1200" height="1200" /></li>
    <li class="highlight"><img draggable="false" src="https://assets.codepen.io/89905/coverflow--MOM-Remixes-1024x1024.jpg" width="1200" height="1200" /></li>
    <li class="sale"><img draggable="false" src="https://assets.codepen.io/89905/coverflow--ALONE-TOGETHER-remix-V71-550x550.jpg" width="1200" height="1200" /></li>
    <li><img draggable="false" src="https://assets.codepen.io/89905/coverflow--Deep-Dive-Ambient-Edits-V8-550x550.jpg" width="1200" height="1200" /></li>
    <li class="highlight"><img draggable="false" src="https://assets.codepen.io/89905/coverflow--Alpine-Koresma-x-Aroth-Artwork-550x550.jpg" width="1200" height="1200" /></li>
  </ul>
</main>

<footer>
  <p>Demo for <a href="https://developer.chrome.com/articles/css-nth-child-of-s" target="_top">https://developer.chrome.com/articles/css-nth-child-of-s</a></p>
</footer>

@layer base, layout;

.highlight:nth-child(2) { /* = Select the element with the class .highlight that is also the 2nd child */
  outline: 0.3rem dashed lightgreen;
  outline-offset: 0.7rem;
}

:nth-child(2 of .highlight) { /* = Select the 2nd child element that has the class .highlight applied to it */
  outline: 0.3rem dashed hotpink;
  outline-offset: 0.7rem;
}

@layer layout {
  html, body {
    background: #333;
    color: #fff;
    text-align: center;
  }
  
  body {
    font-family: system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif;
  }
  
  main {
    max-width: 37rem;
    margin: 0 auto 3rem;
  }
  
  footer {
    font-style: italic;
  }
  
  footer a {
    color: silver;
  }

  .albums {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr));
    gap: 5rem 2rem;
    margin: 2rem 0;
  }

  .albums li {
    position: relative;
    transition: scale 0.2s ease-in-out;
  }

  .albums li:hover {
    scale: 1.1;
  }

  .albums li.sale {
    --color: 255 0 0;
  }
  .albums li.highlight {
    --color: 255 215 0;
  }

  .albums li.sale::before,
  .albums li.highlight::before {
    padding: 0.1rem 0.5rem 0.1rem 0.5rem;
    position: absolute;
    top: 1rem;
    right: -0.5rem;
    display: block;
    z-index: 2;
    height: 1.5rem;
    line-height: 1.5rem;
  }

  .albums li.sale::after,
  .albums li.highlight::after {
    content: '';
    position: absolute;
    top: 2.25rem;
    right: -0.5rem;
    display: block;
    width: 0rem;
    height: 0rem;
    border-top: 0.5rem solid transparent;
    border-bottom: 0.5rem solid transparent;
    border-left: 0.5rem solid rgb(var(--color) / 0.6);
    z-index: 1;
  }

  .albums li.highlight::before {
    content: 'Staff Pick';
    background: rgb(var(--color));
    color: black;
  }

  .albums li.sale::before {
    content: 'Sale';
    background: rgb(var(--color));
    color: white;
  }

  .albums li img {
    display: block;
    max-width: 100%;
    height: auto;

    -webkit-box-reflect: below 0.1rem
        linear-gradient(rgba(0, 0, 0, 0) 75%, rgba(0, 0, 0, 0.25));
  }
}


/* Non-demo styles below */
@layer base {
  @layer reset {
    * {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      padding: 0;
    }
    html, body {
      min-height: 100%;
    }
    ul[class], ul[class] > li {
      list-style: none;
      margin: 0;
      padding: 0;
    }
  }
  @layer layout {
    html {
/*      max-width: 84ch; */
      padding: 3rem 2rem;
      margin: auto;
      line-height: 1.5;
      font-size: 1.25rem;
    }

    a,
    a:visited {
      color: blue;
    }
    

    summary {
      cursor: pointer;
    }

    dd + dt {
      margin-top: 0.5em;
    }

    button {
      cursor: pointer;
    }
  }
  
  @layer code {
    pre {
      border: 1px solid #dedede;
      padding: 1em;
      background: #f7f7f7;
      font-family: "Courier 10 Pitch", Courier, monospace;
      overflow-x: auto;
      border-left: 0.4em solid cornflowerblue;
      tab-size: 4;
    }
    
    code:not(:is(pre, .no-support, .has-support) code), output:not(code:has(output) output) {
      background: #f7f7f7;
      border: 1px solid rgb(0 0 0 / 0.2);
      padding: 0.1rem 0.3rem;
      margin: 0.1rem 0;
      border-radius: 0.2rem;
      display: inline-block;
    }
  }

  @layer support {
    .no-support,
    .has-support {
      margin: 1em 0;
      padding: 1em;
      border: 1px solid #ccc;
    }

    .no-support {
      background-color: #ff00002b;
      display: block;
    }
    .no-support[data-level="warn"] {
      background-color: #ffff002b;
    }
    .has-support {
      background-color: #00ff002b;
      display: none;
    }
    :is(.has-support, .no-support) > :first-child {
      margin-top: 0;
    }
    :is(.has-support, .no-support) > :last-child {
      margin-bottom: 0;
    }
    
    @property --supports-at-property {
      syntax: "*";
      initial-value: ;
      inherits: true;
    }
    .no-support[data-support="at-property"], [data-no-support="at-property"] {
      --value-when-supported: var(--supports-at-property) none;
      --value-when-not-supported: block;
      display: var(--value-when-supported, var(--value-when-not-supported));
    }
    .has-support[data-support="at-property"], [data-has-support="at-property"] {
      --value-when-supported: var(--supports-at-property) block;
      --value-when-not-supported: none;
      display: var(--value-when-supported, var(--value-when-not-supported));
    }

    @supports (transform: scaleX(cos(360deg))) {
      .no-support[data-support="css-trig-fns"] {
        display: none;
      }
      .has-support[data-support="css-trig-fns"] {
        display: block;
      }
    }

    @supports selector(:nth-child(1 of *)) {
      .no-support[data-support="selector-nth-of-s"] {
        display: none;
      }
      .has-support[data-support="selector-nth-of-s"] {
        display: block;
      }
    }
  }
}