body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f4f4f4;
  color: #333;
}
header {
  background: url("https://upload.wikimedia.org/wikipedia/commons/thumb/7/7c/Emblema_da_Guarda_Nacional_Republicana_%28Portugal%29.svg/800px-Emblema_da_Guarda_Nacional_Republicana_%28Portugal%29.svg.png")
    no-repeat center;
  background-size: 80px;
  background-color: #004d40;
  padding: 1rem 2rem;
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
header .logo {
  font-size: 1.3rem;
  font-weight: bold;
}
nav ul {
  list-style: none;
  display: flex;
  margin: 0;
  padding: 0;
}
nav ul li {
  margin: 0 10px;
}
nav a {
  color: #fff;
  text-decoration: none;
  padding: 6px 10px;
  border-radius: 6px;
  transition: 0.3s;
}
nav a:hover {
  background: #008080;
}
footer {
  background: #004d40;
  color: #fff;
  text-align: center;
  padding: 1rem;
  margin-top: 2rem;
}

.conteudo {
  max-width: 1000px;
  margin: 2rem auto;
  padding: 1rem;
}
.novidade {
  background: #fff;
  padding: 1.5rem;
  margin-bottom: 1rem;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}
.novidade h3 {
  color: #004d40;
  margin-top: 0;
}
.novidade small {
  color: #555;
}
.novidade p {
  margin-top: 0.5rem;
}