<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>File Upload with Progress</title>
  <script src="https://cdn.tailwindcss.com"></script>
  <script>
    tailwind.config = {
      theme: {
        extend: {
          animation: {
            'pulse-slow': 'pulse 3s infinite',
          }
        }
      }
    }
  </script>
</head>
<body class="bg-gradient-to-br from-blue-50 to-indigo-100 min-h-screen">
  <div cla