* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: #333;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background-color: #f2f2f2;
}

nav ul {
  display: flex;
}

nav ul li {
  margin: 0 1rem;
}

nav ul li a {
  text-decoration: none;
  color: #333;
}

section {
  padding: 2rem 1rem;
  background-color: #fff