body {
  font-family: sans-serif;
  background-color: #f4f4f9;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.container {
  background-color: #fff;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
  width: 400px;
}

h1 {
  font-size: 18px;
  text-align: center;
  margin-bottom: 15px;
}

textarea {
  width: 100%;
  height: 80px;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid #ccc;
  resize: none;
  margin-bottom: 10px;
}

button {
  width: 100%;
  padding: 10px;
  border-radius: 8px;
  border: none;
  color: #fff;
  background-color: #4a90e2;
  font-size: 16px;
  cursor: pointer;
}

button:hover {
  background-color: #357abd;
}

#output {
  margin-top: 15px;
  padding: 10px;
  border-radius: 8px;
  background-color: #f0f0f0;
  min-height: 60px;
  white-space: pre-wrap;
}