html {
    height: 100%;
    font-size: 15px;
    font-family: 'Cutive Mono', monospace;
    background-color: #000000;
    color: #00ff00
  }

button {
  z-index: 1;
  position: fixed;
  display: inline;
  top: 10px;
  background-color: #000000;
  color: #ffffff;
}

.btn1 {
  left: 10px;
}

.btn2 {
  left: 110px;
}

.btn3 {
  left: 210px;
}

.btn4 {
  left: 290px;
}

#output {
  z-index: 0;
  position: absolute;
  /*
  box-sizing: border-box;
  width: 75%;
  height: 75%;
  */
  min-width: 80%;
  max-height: 80%;
  bottom: 40px;
}

p {
  max-width: none;
  word-wrap: break-word;
}

input {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
  }