html, body {
    height: 100%;
    width: 100%;
    display: block;
    margin: auto;
}

/* Split the screen in half */
.split {
  height: 100%;
  width: 50%;
  position: fixed;
  z-index: 1;
  top: 0;
  overflow-x: hidden;
}

/* Control the left side */
.left {
  left: 0;
  background-color: white;
}

/* Control the right side */
.right {
  right: 0;
  background-color: black;
}

/* Content centered horizontally and vertically */
.centered {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}