.container {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.tree {
  position: relative;
  width: 50px;
  height: 50px;
  transform-style: preserve-3d;
  transform: rotateX(-20deg) rotateY(30deg);
  animation: treeAnimate 5s linear infinite;
}

@keyframes treeAnimate {
  0% {
    transform: rotateX(-20deg) rotateY(360deg);
  }

  100% {
    transform: rotateX(-20deg) rotateY(0deg);
  }
}

.tree div {
  position: absolute;
  top: 150px;
  left: 0;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transform: translateY(calc(25px * var(--x))) translateZ(0px);
}

.tree div.branch span {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, #69c069, #77dd77);
  clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
  border-bottom: 5px solid #00000019;
  transform-origin: bottom;
  transform: rotateY(calc(90deg * var(--i))) rotateX(30deg) translateZ(28.5px);
}

.tree div.stem span {
  position: absolute;
  top: 110px;
 /* updated top value */
  left: calc(50% - 7.5px);
  width: 15px;
  height: 50%;
  background: linear-gradient(90deg, #bb4622, #df7214);
  border-bottom: 5px solid #00000019;
  transform-origin: bottom;
  transform: rotateY(calc(90deg * var(--i))) translateZ(7.5px);
}

.shadow {
  position: absolute;
  top: 200px;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
  filter: blur(20px);
  transform-style: preserve-3d;
  transform: rotateX(90deg) translateZ(-65px);
}