HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <title>mask-position keywords</title>
  <style>
    body {
      font-family: Arial, sans-serif;
      margin: 16px;
      color: #0f172a;
    }

    p {
      margin: 0 0 12px;
      max-width: 40rem;
      line-height: 1.5;
    }

    .row {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .box {
      width: 200px;
    }

    .label {
      margin: 0 0 6px;
      font-weight: 700;
    }

    .panel {
      height: 140px;
      border: 2px dashed #334155;
      background: linear-gradient(135deg, #ea580c, #db2777);
      mask-image: radial-gradient(circle, #000 0 24px, transparent 25px);
      mask-repeat: no-repeat;
      mask-size: 64px 64px;
    }

    .top-left {
      mask-position: top left;
    }

    .bottom-right {
      mask-position: bottom right;
    }
  </style>
</head>
<body>
  <p>Same mask settings. Only <strong>mask-position</strong> changes.</p>
  <div class="row">
    <div class="box">
      <p class="label">top left</p>
      <div class="panel top-left"></div>
    </div>
    <div class="box">
      <p class="label">bottom right</p>
      <div class="panel bottom-right"></div>
    </div>
  </div>
</body>
</html>

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CSS mask-position Property — corner keywords