HTML Code

<!DOCTYPE html>
<html>
<head>
  <title>CSS background-position-y Comparison</title>
  <style>
    body {
      font-family: sans-serif;
      padding: 1.25rem;
      background: #f8fafc;
    }
    .grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 1rem;
      max-width: 48rem;
    }
    .tile {
      height: 130px;
      border-radius: 0.75rem;
      border: 1px solid #cbd5e1;
      background-color: #eff6ff;
      background-image: radial-gradient(circle, #7c3aed 0 22px, transparent 23px);
      background-repeat: no-repeat;
      background-size: 56px 56px;
      background-position-x: center;
    }
    .top { background-position-y: top; }
    .center { background-position-y: center; }
    .bottom { background-position-y: bottom; }
    .percent { background-position-y: 75%; }
    h2 {
      margin: 0 0 0.35rem;
      font-size: 0.9rem;
      color: #0f172a;
    }
  </style>
</head>
<body>
  <h1>background-position-y values</h1>
  <div class="grid">
    <div><h2>top</h2><div class="tile top"></div></div>
    <div><h2>center</h2><div class="tile center"></div></div>
    <div><h2>bottom</h2><div class="tile bottom"></div></div>
    <div><h2>75%</h2><div class="tile percent"></div></div>
  </div>
</body>
</html>

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CSS background-position-y Property - Value Comparison