body {
  background-color: #f4f4f9;
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  color: #333;
}

header {
  background: #4CAF50;
  color: white;
  padding: 10px 0;
  text-align: center;
}

nav {
  background: #333;
  padding: 10px 0;
  text-align: center;
}

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

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

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

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

.container {
  width: 80%;
  margin: 0 auto;
  padding: 20px;
  background: white;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

h1 {
  color: #4CAF50;
}

h3 {
  color: #333;
}

p {
  
  color: #333;
}

ul {
  list-style: disc;
  margin-left: 20px;
}

ul ul {
  list-style: circle;
}