body {
  font-family: "Segoe UI", sans-serif;
  background-color: #0d1117;
  color: #c9d1d9;
  margin: 0;
  padding: 0;
}

header {
  background-color: #161b22;
  padding: 20px;
  text-align: center;
  border-bottom: 2px solid #30363d;
}

nav a {
  color: #58a6ff;
  margin: 0 15px;
  text-decoration: none;
  font-weight: bold;
}

main {
  padding: 20px;
}

section {
  margin-bottom: 30px;
}

footer {
  background-color: #161b22;
  text-align: center;
  padding: 10px;
  position: fixed;
  bottom: 0;
  width: 100%;
  border-top: 1px solid #30363d;
}