body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-image: url('../img/fundo_01.png');
  background-size: cover;
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-position: center;
  color: #ffffff; /* texto claro para contraste */
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.4); /* escurece o fundo */
  z-index: -1;
}

header {
  background-color: #235d32;
  color: white;
  padding: 20px;
  text-align: left;
}

.logo {
  width: 120px;
  height: auto;
  float: left;
  margin-right: 20px;
}


nav a {
  color: white;
  margin: 0 10px;
  text-decoration: none;
}

main {
  padding: 20px;
}

footer {
  background-color: #235d32;
  text-align: center;
  padding: 10px;
}