Webleb - HTML UI Elements - Anonyme Nachricht

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Anonymous Feedback</title>
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-qYLNnb4CKwxpVjsBtRYxR8Y8HL7IjaQKsG5DCt6P6k1BzQ+w5Yd2aSUWxlhAmeE" crossorigin="anonymous">
  <style>
     body {
            font-family: 'Arial', sans-serif;
            background-color: #f0f4f8;
            margin: 0;
            padding: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
        }
        .container {
            background-color: #ffffff;
            border-radius: 10px;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
            padding: 20px;
            width: 90%;
            max-width: 400px;
            text-align: center;
        }
        .header {
            font-size: 24px;
            font-weight: bold;
            margin-bottom: 20px;
            color: #333333;
        }
        .message-box {
            width: 100%;
            padding: 10px;
            border: 1px solid #cccccc;
            border-radius: 5px;
            margin-bottom: 20px;
            resize: none;
            height: 150px;
            font-size: 16px;
            box-sizing:border-box;
        }
        .send-button {
            background-color: #4CAF50;
            color: white;
            padding: 10px 20px;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-size: 16px;
        }
        .send-button:hover {
            background-color: #45a049;
        }
  </style>
</head>
<body>
  <form action="https://formspree.io/f/mpwzedpw" id="feedback-form" method="POST">
    <div class="container my-5">
      
      <header class="text-center mb-4">
        <h2>IT'S ALMOST NEW YEAR????<br>SEND ME ANONYMOUS MESSAGES</h2>
        <p>Share your thoughts about me anonymously. Your feedback will help me improve!</p>
      </header>

<div class="card p-4">
        <div class="form-group">
          <textarea id="feedback-input" name="message" class="message-box" rows="4" placeholder="Write your message here...">

Message developer!

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Message developer!