* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background-color: #f0f2f5;
  color: #333;
}
.container {
  max-width: 800px;
  margin: 2rem auto;
  padding: 2rem;
  background: white;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
h1 {
  text-align: center;
  margin-bottom: 1.5rem;
}
.form-group {
  margin-bottom: 1rem;
}
label {
  display: block;
  font-weight: bold;
  margin-bottom: 0.5rem;
}
select, textarea, input[type="file"] {
  width: 100%;
  padding: 0.5rem;
  font-size: 1rem;
  border-radius: 5px;
  border: 1px solid #ccc;
}
textarea {
  height: 100px;
}
button {
  display: block;
  width: 100%;
  padding: 0.75rem;
  font-size: 1.1rem;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}
button:hover {
  background-color: #0056b3;
}
pre#output {
  margin-top: 2rem;
  background: #f8f9fa;
  padding: 1rem;
  border-radius: 5px;
  font-family: monospace;
  white-space: pre-wrap;
  word-wrap: break-word;
}
@media (max-width: 600px) {
  .container {
    padding: 1rem;
  }
}