style.css

body {
  font: 1.3rem monospace;
  color: #00ff00;
  text-shadow: 0 0 5px #00ff00;
  box-shadow: 0 0 10px black;
  background-color: black;
  margin: 0;
  padding: 1rem;
}

.prompt {
  display: flex;
}

.prompt input {
  margin-left: 10px;
}

.stdout {
  display: none;
  flex-wrap: wrap;
}

.terminal input {
  width: 100%;
  display: table-cell;
  border: none;
  outline: none;
  font: 1.3rem monospace;
  color: #00ff00;
  text-shadow: 0 0 5px #00ff00;
  box-shadow: 0 0 10px black;
  background-color: black;
  overflow: hidden;
}

.box1 {
  flex: 1 1 auto;
  border: 2px solid #00ff00;
  padding: 5px;
  margin: 10px;
  box-shadow: 0 0 5px #00ff00;
}

.box2 {
  flex: 2 1 auto;
  border: 2px solid #00ff00;
  padding: 5px;
  margin: 10px;
  box-shadow: 0 0 5px #00ff00;
}

.white {
  color: #ffffff;
  text-shadow: 0 0 5px #ffffff;
}

.green {
  color: #00ff00;
  text-shadow: 0 0 5px #00ff00;
}

.blue {
  color: #0000ff;
  text-shadow: 0 0 5px #0000ff;
}

.yellow {
  color: #ffff00;
  text-shadow: 0 0 5px #ffff00;
}

.red {
  color: #ff0000;
  text-shadow: 0 0 5px #ff0000;
}

.purple {
  color: #ff00ff;
  text-shadow: 0 0 5px #ff00ff;
}