body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: #121212;
  color: #f0f0f0;
}

header {
  background-color: #1f1f1f;
  padding: 20px;
  text-align: center;
}

nav a {
  color: #f0f0f0;
  margin: 0 15px;
  text-decoration: none;
}

nav a:hover {
  text-decoration: underline;
}

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

footer {
  background-color: #1f1f1f;
  color: #ccc;
  text-align: center;
  padding: 10px;
  font-size: 0.9em;
  margin-top: 40px;
}

.gallery img {
  max-width: 100%;
  height: auto;
  margin-bottom: 20px;
  border: 2px solid #333;
  border-radius: 5px;
}