body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #fefefe;
  color: #333;
  margin: 0;
  padding: 0;
}

header {
  background-color: #2c3e50;
  color: white;
  padding: 40px 20px;
  text-align: center;
}

header img {
  display: block;
  margin: 0 auto 20px auto;
}

nav {
  background-color: #34495e;
  padding: 10px 0;
  text-align: center;
}

nav ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
}

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

nav a {
  color: white;
  text-decoration: none;
  font-weight: bold;
}

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

section {
  padding: 40px 20px;
  max-width: 800px;
  margin: auto;
}

h2 {
  color: #2c3e50;
  border-bottom: 2px solid #ddd;
  padding-bottom: 5px;
}

ul {
  padding-left: 20px;
}

footer {
  background-color: #ecf0f1;
  text-align: center;
  padding: 20px;
  font-size: 0.9em;
  color: #777;
}