/* Header */
#menu {
  background-color: #fff;
  padding: 1rem 0;
  text-align: center;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

nav .btn {
  margin: 0 1rem;
  text-decoration: none;
  color: #333;
  font-weight: 500;
  border: 1px solid #ccc;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: background-color 0.3s ease;
}

nav .btn:hover {
  background-color: #f0f0f0;
}

/* Main layout */
main {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 3rem;
  align-items: center;
}

section {
  width: 100%;
  max-width: 800px;
}

h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  text-align: center;
}

.card {
  background-color: #fff;
  border-radius: 12px;
  padding: 1rem;
  margin-bottom: 2rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  text-align: center;
}

.card img,
.card video {
  max-width: 100%;
  max-height: 300px;
  object-fit: contain;
  border-radius: 8px;
  margin-bottom: 1rem;
  display: block;
  margin-left: auto;
  margin-right: auto;
}