.Voltar {
    text-decoration: none;
    color: black;
    padding: 8px;
    background-color: aqua;
    border: 1px solid black;
    border-radius: 8px;
}

body {
    font-family: "Roboto Mono", monospace;
    text-align: center;
    background-image: url("https://caelum-online-public.s3.amazonaws.com/assets-imersaodev/background_mentalista.png");
    background-color: #000000;
    background-size: cover;
    background-position: center top;
    background-repeat: no-repeat;
    height: 100vh;
  }
  
  .container {
    text-align: center;
    padding: 20px;
  }
  
  .page-title {
    color: #ffffff;
    margin: 0 0 5px;
  }
  
  .page-subtitle {
    color: #ffffff;
    margin-top: 5px;
  }
  
  .page-logo {
    width: 200px;
  }
  
  .alura-logo {
    width: 40px;
    position: absolute;
    top: 10px;
    right: 10px;
  }
  
  body > img {
    margin: 0 10px;
  }
  
  img {
    max-height: 350px;
  }