* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  background-color: #f9f9f9;
  padding: 20px;
}

header, footer {
  background-color: #333;
  color: #fff;
  padding: 10px;
  text-align: center;
}

main {
  margin-top: 20px;
}

.conteudo {
  background-color: #fff;
  padding: 15px;
  border-radius: 5px;
  text-align: center;
}

.conteudo img {
  width: 100%;
  max-width: 300px;
  margin-top: 15px;
  border-radius: 8px;
}

/* Responsividade*/
/* Responsividade*/

@media (max-width: 375px) {
  body {
    padding: 10px;
  }

  .conteudo {
    font-size: 16px;
  }

  header, footer {
    font-size: 14px;
    padding: 8px;
  }
}