body {
  font-family: Arial, sans-serif;
  background-color: #f5f5f5;
  margin: 0; padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
}

#launch-btn {
  padding: 15px 25px;
  font-size: 18px;
  cursor: pointer;
  border: none;
  background-color: #0078d7;
  color: white;
  border-radius: 6px;
  transition: background-color 0.3s ease;
}

#launch-btn:hover {
  background-color: #005fa3;
}

.hidden {
  display: none;
}

#kinestex-container {
  width: 100%;
  max-width: 640px;
  height: 720px;
  box-shadow: 0 0 10px rgba(0,0,0,0.15);
  border-radius: 12px;
  overflow: hidden;
  background-color: white;
}

#kinestex-iframe {
  width: 100%;
  height: 100%;
  border: none;
}