body {
  font-family: Arial, sans-serif;
  background: #f5f5f5;
  padding: 40px;
  display: flex;
  justify-content: center;
}

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

label {
  display: block;
  margin: 15px 0 5px;
  font-weight: bold;
}

input, textarea {
  width: 100%;
  padding: 10px;
  font-size: 15px;
  margin-bottom: 10px;
}

textarea {
  height: 150px;
  resize: vertical;
}

button {
  padding: 10px 20px;
  font-size: 16px;
  margin: 10px 0;
}

pre {
  background: #eee;
  padding: 15px;
  white-space: pre-wrap;
}