body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: black;
  color: white;
}

header, footer {
  background-color:black;
  color: white;
  text-align: center;
  padding: 1rem;
}

main {
  padding: 2rem;
  text-align: center;
}

button {
  padding: 0.5rem 1rem;
  background-color: #28A745;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}
button:hover {
  background-color: #218838;
}

nav {
  background-color: #333;
  padding: 1rem;
  text-align: center;
}
nav a {
  color: white;
  margin: 0 1rem;
  text-decoration: none;
}
nav a:hover {
  text-decoration: underline;
}