body {
  font-family: Arial, sans-serif;
  background: #0b0c10;
  color: #fff;
  margin: 0;
  padding: 0;
}

header {
  background: #1f2833;
  padding: 15px;
}

nav ul {
  display: flex;
  list-style: none;
  justify-content: center;
}

nav ul li {
  margin: 0 20px;
}

nav ul li a {
  color: #66fcf1;
  text-decoration: none;
}

section {
  padding: 50px;
  text-align: center;
}