.cetl-timeline {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  padding: 20px;
  margin: 40px 0;
}

.cetl-timeline::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 3px;
  height: 100%;
  background: var(--color-neutral-3);
}

.cetl-timeline-item {
  display: flex;
  margin: 20px 0;
  width: 80%;
  position: relative;
}

.cetl-timeline-marker {
  width: 20px;
  height: 20px;
  background: #fff;
  border: 2px solid #333;
  border-radius: 50%;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translateX(-50%) translateY(-50%);
}

.cetl-timeline-content {
  box-shadow: var(--boxshadow-1);
  background: #fff;
  padding: 40px;
  border-radius: var(--border-radius-1);
  width: calc(50% - 30px);
  position: relative;
  opacity: 0;
  transform: scale(0);
  transition: all 0.3s ease-in;
}

.cetl-timeline-item.animate .cetl-timeline-content {
  animation: popup 0.4s ease-in-out forwards;
}

.cetl-timeline-item:nth-child(odd) .cetl-timeline-content {
  margin-right: auto;
}

.cetl-timeline-item:nth-child(even) .cetl-timeline-content {
  margin-left: auto;
}

@keyframes popup {
  0% {
    transform: scale(0);
    opacity: 0;
  }
  50% {
    transform: scale(1.1);
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

@media (max-width: 680px) {
  .cetl-timeline-item {
    width: 100%;
  }
  .cetl-timeline-content {
    width: 90%;
  }

  .cetl-timeline::before {
    transform: translateX(-50%) translateY(-50%);
    height: 90%;
    top: 50%;
  }
}