body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f9f9f9;
  color: #333;
}
header {
  background-color: #222;
  color: #fff;
  padding: 1rem;
  text-align: center;
}
nav a {
  color: #fff;
  margin: 0 1rem;
  text-decoration: none;
}
main {
  padding: 2rem;
}
footer {
  background-color: #222;
  color: #fff;
  text-align: center;
  padding: 1rem;
  position: fixed;
  width: 100%;
  bottom: 0;
}
.video-container {
  max-width: 100%;
  text-align: center;
}
audio {
  width: 100%;
  margin-top: 1rem;
}