#grades .circle {
    padding: 13px 20px;
    border-radius: 50%;
    background-color: var(--color-red);
    color: #fff;
    max-height: 50px;
    z-index: 2;
  }
  
  #grades .how-it-works.row .col-2 {
    align-self: stretch;
  }
  #grades .how-it-works.row .col-2::after {
    content: "";
    position: absolute;
    border-left: 3px solid var(--color-red);
    z-index: 1;
  }

  
  
  #grades .timeline div {
    padding: 0;
    height: 40px;
  }
  #grades .timeline hr {
    border-top: 3px solid var(--color-red);
    margin: 0;
    top: 17px;
    position: relative;
    opacity: 1;
  }
  #grades .timeline .col-2 {
    display: flex;
    overflow: hidden;
  }
  #grades .timeline .corner {
    border: 3px solid var(--color-red);
    width: 100%;
    position: relative;
    border-radius: 15px;
  }
  #grades .timeline .top-right {
    left: 50%;
    top: -50%;
  }
  #grades .timeline .left-bottom {
    left: -50%;
    top: calc(50% - 3px);
  }
  #grades .timeline .top-left {
    left: -50%;
    top: -50%;
  }
  #grades .timeline .right-bottom {
    left: 50%;
    top: calc(50% - 3px);
  }
  
  #grades img{
    max-width: 120px;
  }