* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', monospace;
  background: #f8f9fa;
  padding: 20px;
  line-height: 1.5;
}
#wrapper {
  max-width: 800px;
  margin: 0 auto;
  background: white;
  padding: 24px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}
h1 {
  margin-bottom: 24px;
  color: #333;
  text-align: center;
}
.input-group {
  margin-bottom: 16px;
}
.input-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  color: #444;
}
input[type="file"],
input[type="url"] {
  width: 100%;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 14px;
}
button {
  margin-top: 8px;
  padding: 8px 16px;
  background: #1d4ed8;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
}
button:hover {
  background: #1e40af;
}
#output {
  width: 100%;
  height: 300px;
  padding: 12px;
  font-family: monospace;
  white-space: pre;
  overflow: auto;
  background: #fdf6e3;
  border: 1px solid #eee8d5;
  border-radius: 4px;
  margin-top: 16px;
}