body {
      font-family: Arial, sans-serif;
      background-color: #1e1e1e;
      color: #ffffff;
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 40px;
    }

    .container {
      background-color: #2c2c2c;
      padding: 30px;
      border-radius: 10px;
      box-shadow: 0 0 10px #000;
      width: 100%;
      max-width: 400px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      margin-bottom: 20px;
      text-align: left;
    }

    label {
      margin-bottom: 5px;
      font-weight: bold;
    }

    input {
      padding: 10px;
      border-radius: 5px;
      border: none;
      font-size: 16px;
    }

    button {
      padding: 12px;
      background-color: #4caf50;
      color: white;
      border: none;
      border-radius: 5px;
      font-size: 16px;
      cursor: pointer;
      width: 100%;
    }

    .resultado {
      margin-top: 25px;
      font-size: 18px;
      font-weight: bold;
      color: #00ffcc;
      text-align: center;
    }

    .erro {
      color: red;