body {
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  background-color: #101010;
  color: #f1f1f1;
}

header {
  text-align: center;
  background-color: #1a1a1a;
  padding: 2rem 1rem;
  border-bottom: 3px solid #c00;
}

nav {
  background-color: #111;
  padding: 1rem;
  text-align: center;
}

nav button {
  background: #c00;
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  font-size: 1rem;
  cursor: pointer;
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
}

nav ul li {
  margin: 0.5rem 0;
}

nav ul li a {
  color: #ff4040;
  text-decoration: none;
}

nav ul li a:hover {
  text-decoration: underline;
}

#menu.hidden {
  display: none;
}

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

section {
  margin-bottom: 3rem;
}

footer {
  text-align: center;
  padding: 1rem;
  background-color: #1a1a1a;
  border-top: 2px solid #c00;
}