body {
  background-color: #222222; /* azul claro */
}
details [open] summary {
  background-color: #444444; /* cinza escuro */
  width: 50px;
  height: 50px;
  background-color: #ffffff; /* branco */
}
summary {
  background-color: #333333; /* cinza médio */
  color: #ffffff; /* branco */
  outline: none;
  margin-left: 150px;
  margin-right: 150px;
  padding: 20px;
}

details p {
  background-color: #068feb; /* cinza claro */
  color: #ffffff; /* branco */
  line-height: 1.5;
  padding: 10px;
  margin-left: 150px;
  margin-right: 150px;
}
h1 {
  color: aliceblue;
  padding-left: 30px;
  padding-top: 25px;
  padding-bottom: 30px;
}
h3 {
  color: aliceblue;
  padding-top: 10px;
  padding-bottom: 40px;
  text-align: center;
}