body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f8f8f8;
  color: #333;
}

header {
  background-color: #0099cc;
  color: white;
  text-align: center;
  padding: 1rem;
}

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

main {
  max-width: 900px;
  margin: 2rem auto;
  padding: 1rem;
  background: white;
  border-radius: 8px;
}

h2 {
  color: #0099cc;
}

footer {
  background: #333;
  color: white;
  text-align: center;
  padding: 1rem;
  margin-top: 2rem;
}

.anuncio {
  background: #eee;
  border: 1px dashed #ccc;
  text-align: center;
  padding: 1rem;
  margin: 2rem 0;
}

form {
  display: flex;
  flex-direction: column;
}

input, textarea {
  padding: 0.5rem;
  margin-bottom: 1rem;
  border-radius: 4px;
  border: 1px solid #ccc;
}

button {
  padding: 0.7rem;
  background-color: #0099cc;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

button:hover {
  background-color: #0077a3;
}