/* Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Page */
body {
  font-family: Arial, sans-serif;
  background-color: #f0f0f0;
  padding: 20px;
  color: #333;
}

/* Heading */
h1 {
  margin-bottom: 15px;
}

/* Controls */
.controls {
  margin-bottom: 10px;
}

select {
  padding: 8px 10px;
  font-size: 14px;
  margin-right: 10px;
}

button {
  background-color: #000;
  color: white;
  padding: 10px 22px;
  font-size: 14px;
  border: none;
  cursor: pointer;
}

button:hover {
  background-color: #444;
}

/* Editor */
#codeEditor {
  width: 100%;
  height: 280px;
  margin-top: 10px;
  padding: 10px;
  font-family: "Courier New", monospace;
  font-size: 14px;
  border: 2px solid #ccc;
  resize: vertical;
}

/* Output */
#output {
  margin-top: 15px;
  width: 100%;
  min-height: 180px;
  padding: 10px;
  background-color: #fff;
  border: 2px solid #ccc;
  font-family: "Courier New", monospace;
  font-size: 14px;
  white-space: pre-wrap;
}

/* Error output */
#output.error {
  color: red;
  border-color: red;
}