Tailwind CSS 4 Button With Loading Spinner

<!doctype html>
<html>
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Tailwind CSS Button With Loading Spinner</title>
  <script src="https://cdn.jsdelivr.net/npm/@tailwindcss/browser@4.2.1"></script>
</head>
<body class="bg-gray-50 flex items-center justify-center min-h-screen">

<button class="flex items-center gap-4 px-10 py-4 bg-indigo-600 text-white rounded-2xl font-black text-sm uppercase tracking-widest shadow-2xl shadow-indigo-100 transition-all cursor-wait overflow-hidden relative group">
    <svg class="animate-spin h-5 w-5 text-white" fill="none" viewBox="0 0 24 24">
      <circle class="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" stroke-width="4"></circle>
      <path class="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"></path>
    </svg>
    <span>Processing...</span>
  </button>

</body>
</html>