/* General Styles */
body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  background-color: #f9f9f9;
}

header, footer {
  background-color: #333;
  color: #fff;
  padding: 10px 20px;
  width: 100%;
}

header h1, footer p {
  text-align: center;
}

nav ul {
  list-style: none;
  padding: 0;
  text-align: center;
}

nav ul li {
  display: inline;
  margin: 0 15px;
}

nav ul li a {
  color: #fff;
  text-decoration: none;
}

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

nav ul li a.active {
  font-weight: bold;
  text-decoration: underline;
}

main {
  padding: 20px;
}

h1, h2 {
  color: #333;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 20px auto;
}