#img1 {
  height: 70px;
  width: 100%;
}

#img2 {
  height: 73px;
  width: 100%;
}

#img3 {
  height: 65px;
  width: 100%;
}

.timeline {
    position: relative;
    padding: 100px 0;
    width: 90%;
    max-width: 1200px;
    margin: auto;
  }
  
  .timeline-line {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 100%;
    background: linear-gradient(to bottom, #00ffc3, #ff4ecd);
    z-index: 0;
    pointer-events: none;
  }
  
  .timeline-event {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 100px 0;
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.6s ease-out;
  }
  
  .timeline-event.show {
    opacity: 1;
    transform: translateY(0);
  }
  
  .timeline-icon {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 70px;
    height: 70px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid #00ffc3;
    box-shadow: 0 0 10px #00ffc3;
    background-color: #111;
    z-index: 2;
  }
  
  .timeline-content {
    background: #1f1f1f;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 15px #ff4ecd;
    width: 45%;
    z-index: 1;
  }

  .timeline-event:nth-child(odd) {
    flex-direction: row-reverse;
  }
  
  .timeline-event:nth-child(odd) .timeline-content {
    text-align: right;
  }

  .timeline-event:nth-child(even) .timeline-content {
    text-align: left;
  }

#back2top {
  background: #00ffc3;
  color: #111;
  padding: 15px 30px;
  font-size: 1.2rem;
  border: none;
  border-radius: 10px;
  box-shadow: 0 0 15px #00ffc3;
  cursor: pointer;
}

#back2top:hover {
  background: #ff4ecd;
  box-shadow: 0 0 20px #ff4ecd;
  color: white;
}