html, body {
  height: 100%;
  width: 100%;
  font-size: 12px;
}
@media (min-width: 480px) {
  html, body {
    font-size: 14px;
  }
}
@media (min-width: 768px) {
  html, body {
    font-size: 16px;
  }
}

.left, .right {
  position: absolute;
  width: 50%;
  height: 100%;
  top: 0;
}

.right {
  right: 0;
}

.left {
  left: 0;
  transform: scale(-1, 1);
}

textarea {
  display: block;
  min-height: 100%;
  width: 100%;
  box-sizing: border-box;
  padding: 1rem 0.5rem;
  margin: 0;
  font-size: 1rem;
  font-family: "Source Code Pro", monospace;
  font-weight: 600;
  line-height: 1.5rem;
  resize: none;
  white-space: pre-wrap;
  border-radius: 0;
  outline: none;
  border-width: 0;
}

.left textarea::-moz-placeholder {
  color: #222;
  background-color: #f7f7f7;
}

.left textarea:-ms-input-placeholder {
  color: #222;
  background-color: #f7f7f7;
}

.left textarea, .left textarea::placeholder {
  color: #222;
  background-color: #f7f7f7;
}

.right textarea::-moz-placeholder {
  color: #f7f7f7;
  background-color: #222;
}

.right textarea:-ms-input-placeholder {
  color: #f7f7f7;
  background-color: #222;
}

.right textarea, .right textarea::placeholder {
  color: #f7f7f7;
  background-color: #222;
}