body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f9f9f9;
  color: #333;
}
header {
  background: #ffffff;
  border-bottom: 1px solid #ddd;
  padding: 1rem;
  text-align: center;
}
header h1 {
  margin: 0.5rem 0;
}
nav a {
  color: #007BFF;
  text-decoration: none;
  font-size: 0.9rem;
}
.home {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 3rem auto;
  gap: 1.5rem;
}
.button {
  padding: 1rem 2rem;
  background: #007BFF;
  color: white;
  border-radius: 8px;
  text-decoration: none;
  font-size: 1.2rem;
  transition: background 0.2s ease;
}
.button:hover {
  background: #0056b3;
}
main {
  padding: 1rem;
}
section h2 {
  margin-top: 2rem;
}
iframe {
  margin-top: 1rem;
  border-radius: 8px;
}
footer {
  margin-top: 2rem;
  text-align: center;
  font-size: 0.9rem;
  color: #555;
  padding: 1rem;
}