body {
  font-family: Arial, sans-serif;
  background: #f0f0f0;
  padding: 30px;
  display: flex;
  justify-content: center;
}

.container {
  background: white;
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  max-width: 700px;
  width: 100%;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

textarea {
  width: 90%;
  height: 120px;
  margin-top: 15px;
  padding: 10px;
  font-size: 14px;
  font-family: monospace;
}

button {
  margin: 15px;
  padding: 10px 20px;
  font-size: 16px;
}

.result-box {
  text-align: left;
  margin-top: 20px;
}

pre {
  background: #eee;
  padding: 10px;
  border-radius: 6px;
  overflow-x: auto;
}