body {
      font-family: Arial, sans-serif;
      background: #000000;
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
    }
    .registro-container {
      background: white;
      padding: 20px 30px;
      border-radius: 12px;
      box-shadow: 0 0 10px rgba(0,0,0,0.2);
      width: 300px;
    }
    h2 {
      text-align: center;
      margin-bottom: 20px;
    }
    label {
      font-weight: bold;
      display: block;
      margin-bottom: 5px;
    }
    input {
      width: 100%;
      padding: 8px;
      margin-bottom: 15px;
      border: 1px solid #ccc;
      border-radius: 6px;
    }
    button {
      width: 100%;
      background: #4CAF50;
      color: white;
      border: none;
      padding: 10px;
      border-radius: 6px;
      font-size: 16px;
      cursor: pointer;
    }
    button:hover {
      background: #45a049;
    }
    .error {
      color: red;
      text-align: center;
      margin-bottom: 10px;
    }
    .success {
      color: green;
      text-align: center;
      margin-bottom: 10px;
    }