body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: Arial, sans-serif;
  background: #10141c;
  color: #f5f7fa;
}

main {
  text-align: center;
  padding: 24px;
}

.download-button {
  display: inline-block;
  padding: 14px 22px;
  border-radius: 8px;
  background: #78a9ff;
  color: #10141c;
  text-decoration: none;
  font-weight: bold;
}