/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: #007bff;
  color: #fff;
  padding: 20px;
}

header img {
  display: block;
  margin: 0 auto;
}

/* Main content */
main {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 20px;
}

main p {
  font-size: 18px;
  line-height: 1.5;
  margin-bottom: 20px;
}

* {
  font-family: Helvetica, sans-serif;
}

.download-btn {
  display: none;
}

.download-btn.show {
  display: inline-block;
  background-color: #007bff;
  color: #fff;
  border: none;
  padding: 10px 20px;
  font-size: 18px;
  border-radius: 5px;
  cursor: pointer;
}

.download-btn.show:hover {
  background-color: #0069d9;
}

/* Footer */
footer {
  background-color: #f8f9fa;
  padding: 20px;
  text-align: center;
  font-size: 14px;
}