body {
  font-family: Arial, sans-serif;
  background: linear-gradient(145deg, #f2fcfe, #1c92d2);
  margin: 0;
  padding: 20px;
  color: #333;
}
.container {
  max-width: 600px;
  margin: auto;
  background: white;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 5px 10px rgba(0,0,0,0.2);
  text-align: center;
}
button {
  padding: 10px 20px;
  background: #007bff;
  color: white;
  border: none;
  border-radius: 8px;
  margin: 10px;
}
button:hover {
  background: #0056b3;
}
.hidden {
  display: none;
}
img {
  width: 100%;
  max-height: 200px;
  object-fit: contain;
  border-radius: 8px;
}
footer {
  margin-top: 30px;
  font-size: 14px;
  color: #444;
}