body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f4f4f4;
  color: #333;
}
header {
  background-color: #0074D9;
  color: white;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  height: 50px;
}
nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
}
nav li {
  margin-left: 15px;
}
nav a {
  color: white;
  text-decoration: none;
}
main {
  padding: 20px;
}
footer {
  background-color: #333;
  color: white;
  text-align: center;
  padding: 10px 0;
}