HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <title>offset-rotate: auto 45deg</title>
  <style>
    body {
      font-family: Arial, sans-serif;
      margin: 16px;
      color: #0f172a;
    }

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

    @keyframes travel {
      to { offset-distance: 100%; }
    }

    div {
      width: 28px;
      height: 16px;
      background: #2563eb;
      clip-path: polygon(0% 20%, 65% 20%, 65% 0%, 100% 50%, 65% 100%, 65% 80%, 0% 80%);
      offset-path: path("M 20 100 Q 100 20 180 100 T 340 100");
      offset-rotate: auto 45deg;
      animation: travel 4s ease-in-out infinite alternate;
    }
  </style>
</head>
<body>
  <p><strong>offset-rotate: auto 45deg</strong> follows the path direction, then adds a constant 45deg offset.</p>
  <div></div>
</body>
</html>

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CSS offset-rotate Property — auto 45deg