body {
  font-family: Arial, sans-serif;
  margin: 0;
  background-color: #111;
  color: #eee;
}

header {
  background-color: #222;
  padding: 10px;
  text-align: center;
}

.logo {
  width: 120px;
}

nav ul {
  list-style-type: none;
  padding: 0;
  margin: 10px 0;
  display: flex;
  justify-content: center;
}

nav ul li {
  margin: 0 15px;
}

nav a {
  color: #00ff99;
  text-decoration: none;
  font-weight: bold;
}

nav a.activo, nav a:hover {
  text-decoration: underline;
}

main {
  max-width: 900px;
  margin: auto;
  padding: 20px;
}

footer {
  text-align: center;
  background-color: #222;
  padding: 10px;
  margin-top: 40px;
}

.galeria {
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
}

.galeria img {
  width: 250px;
  margin: 10px;
  border-radius: 8px;
  border: 2px solid #444;
}

form {
  background-color: #1c1c1c;
  padding: 20px;
  border-radius: 8px;
}

input, textarea, select, button {
  margin: 10px 0;
  display: block;
  width: 100%;
  padding: 8px;
  border: none;
  border-radius: 4px;
}

button {
  background-color: #00ff99;
  color: #111;
  font-weight: bold;
  cursor: pointer;
}

button:hover {
  background-color: #00cc77;
}