.game-preview {
  text-align: center;          /* căn giữa toàn bộ */
  margin: 30px auto;
}

.game-preview img {
  max-width: 380px;            /* vừa màn iPhone */
  width: 30%;
  height: auto;
  display: block;
  margin: 0 auto 20px;         /* giữa + cách nút */
  border-radius: 16px;         /* bo góc cho đẹp */
}

.btn-download {
  display: inline-block;
  background: #e60000;
  color: #fff;
  font-weight: bold;
  padding: 14px 24px;
  border-radius: 12px;
  text-decoration: none;
  font-size: 16px;
}

.btn-download:hover {
  background: #c40000;
}