.extendable_container {
  position: relative;
}

.extendable_content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.extendable_content_horizontal {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, 0%);
  text-align: center;
}

.extendable_content_vertical {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(0%, -50%);
  text-align: center;
}