@keyframes scroll {
    0% {
      transform: translateX(0);
    }
    100% {
      transform: translateX(calc(-220px * 7));
    }
  }
  .slider {
    position:relative;
    top:-80px;
    height: auto;
    margin: auto;
    overflow: hidden;
    background: transparent;
    box-shadow: 0 10px 20px -5px rgba(0, 0, 0, 0.125);
    position: relative;
    width: 100%;
  }
  
  .slider .slide-track {
    position: relative;
    top:80px;
    display: flex;
    display: inline-flex;
    animation: scroll 40s linear infinite;
    width: calc(220px * 14);
  }
  
  .slider .slide {
    height: 500px;
    width: 220px;
  }

  @media (min-width: 320px) and (max-width: 768px){
    .slider .slide {
      width: 220px;
    }
  }