body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #f0f0f0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.ui-container {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  background: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

button {
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
  margin-top: 10px;
}