body {
  margin: 0;
  font-family: Arial, sans-serif;
}

nav {
  position: sticky;
  top: 0;
  background: white;
  padding: 0.5rem;
  z-index: 999;
  text-align: center;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

nav a {
  text-decoration: none;
  color: #007B5E;
  font-weight: bold;
}

main section {
  margin: 0;
  padding: 0;
}

main img {
  width: 100%;
  height: auto;
  display: block;
}

footer {
  text-align: center;
  padding: 1rem;
  background: #007B5E;
  color: white;
}