body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  text-align: center;
}

header {
  background-color: #4caf50;
  color: white;
  padding: 20px;
}

header h1 {
  margin: 0;
  padding: 0;
}

.links {
  margin-top: 20px;
}

.whatsapp-btn,
.youtube-btn {
  display: inline-block;
  margin: 10px;
  padding: 10px 20px;
  color: white;
  text-decoration: none;
  border-radius: 5px;
}

.whatsapp-btn {
  background-color: #25d366;
}

.youtube-btn {
  background-color: #ff0000;
}

@media screen and (max-width: 600px) {
  .whatsapp-btn,
  .youtube-btn {
    width: 80%;
    padding: 15px;
  }
}