/* style.css */
body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f4f4f4;
}
header {
  background-color: #20232a;
  color: white;
  padding: 1rem;
  text-align: center;
}
nav button {
  margin: 0 5px;
  padding: 0.5rem;
  cursor: pointer;
}
main {
  padding: 1rem;
}
.hidden {
  display: none;
}
footer {
  text-align: center;
  padding: 1rem;
  background: #20232a;
  color: white;
}