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

body {
  font-family: monospace;
  background-color: #0d1117;
  color: #c9d1d9;
  line-height: 1.6;
}

header {
  border-bottom: 1px solid #30363d;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 1rem;
}

nav a {
  text-decoration: none;
  color: #c9d1d9;
}

main {
  max-width: 800px;
  margin: auto;
  padding: 2rem 1rem;
}

section {
  margin-bottom: 2rem;
}

footer {
  text-align: center;
  padding: 1rem;
  border-top: 1px solid #30363d;
  font-size: 0.9rem;
}