body {
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  padding: 0;
  background-color: #0e1117;
  color: #f5f5f5;
}
header {
  background-color: #141e30;
  padding: 2rem;
  text-align: center;
}
nav {
  background-color: #1c1f26;
  padding: 1rem;
  text-align: center;
}
nav a {
  color: #00d0ff;
  text-decoration: none;
  margin: 0 1rem;
}
section, main {
  padding: 2rem;
}
footer {
  background-color: #141e30;
  text-align: center;
  padding: 1rem;
  font-size: 0.9rem;
}