body {
  background-color: #f4f4f4;
  color: #000;
  font-family: monospace;
  padding: 20px;
}

#terminal {
  border: 2px solid #000;
  padding: 10px;
  background: #fff;
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
}

#output {
  white-space: pre-wrap;
  margin-bottom: 10px;
}

#input-line {
  display: flex;
  gap: 5px;
}

input#cmd {
  flex: 1;
  font-family: monospace;
  font-size: 1em;
  border: none;
  outline: none;
  background: none;
}