@import url("https://fonts.googleapis.com/css2?family=Roboto:wght@700&display=swap");

body {
  font-family: "Roboto", sans-serif;
  background-color: #3c3c3c;
  color: #f4f4f4;
}

.carta {
  max-width: 800px;
  margin: 50px auto;
  padding: 40px;
  background-color: #2b2b2b;
  box-shadow: 0px 0px 20px rgba(0, 0, 0, 0.5);
  border-radius: 10px;
  border: 2px solid #f4f4f4;
}

.cabecalho,
.corpo,
.assinatura {
  margin-bottom: 30px;
}

.cabecalho h2 {
  text-align: center;
  color: #f4f4f4;
  border-bottom: 2px solid #f4f4f4;
  padding-bottom: 10px;
}

.corpo p {
  line-height: 1.6;
  color: #f4f4f4;
  text-indent: 30px;
  margin: 20px;
}

.assinatura h3 {
  text-align: right;
  color: #f4f4f4;
  border-top: 2px solid #f4f4f4;
  padding-top: 10px;
}

@media only screen and (max-width: 600px) {
  .carta {
    width: 90%;
    padding: 20px;
  }
}