body {
	margin-left: 200px;
	margin-right: 200px;
	padding: 0;
	font-family: Arial, sans-serif;
  }
header {
background-color: #333;
color: #fff;
padding: 20px;
}
nav {
display: flex;
justify-content: space-between;
align-items: center;
}
nav ul {
list-style: none;
margin: 0;
padding: 0;
display: flex;
}
nav li {
margin-right: 20px;
}
nav a {
color: #fff;
text-decoration: none;
font-size: 18px;
font-weight: bold;
}
nav a:hover {
color: #fff;
text-decoration: underline;
}