body {
  background-color: #111;
  color: #eee;
  font-family: Arial, sans-serif;
  text-align: center;
}

header {
  margin-top: 30px;
}

.logo {
  max-width: 400px;
  width: 90%;
  height: auto;
}

.download-link {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 20px;
  background: #c00;
  color: #fff;
  text-decoration: none;
  border-radius: 6px;
  font-weight: bold;
}

.download-link:hover {
  background: #f00;
}