.timeline {
  position: relative;
  margin: 40px 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  width: 4px;
  height: 100%;
  background: #4472c4;
  transform: translateX(-50%);
}

/* ITEM */
.timeline-item {
  position: relative;
  width: 50%;
  padding: 20px 40px;
}

.timeline-item.left { left: 0; }
.timeline-item.right { left: 50%; }


.timeline-time {
  position: absolute;
  left: 50%;
  top: 0;
  transform: translate(-50%, -50%);
  background: #4472c4;
  color: white;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  z-index: 10;
  white-space: nowrap;
}

/* CARD */
.timeline-card {
  background: white;
  border: 1px solid #4472c4;
  border-radius: 10px;
  padding: 15px;
}

/* TITLU ZI */
.timeline-title {
  background: #4472c4;
  color: white;
  padding: 10px;
  border-radius: 6px;
  text-align: center;
  margin-top: 40px;
}

/* MOBILE */
@media (max-width:768px){

  .timeline::before {
    left: 20px;
  }

  .timeline-item {
    width: 100%;
    padding-left: 60px;
  }

  .timeline-item.left,
  .timeline-item.right {
    left: 0;
  }

  .timeline-time {
    left: 20px;
    transform: translateY(-50%);
  }
}

.program-wrap {
    max-width: 1100px;
    margin: 0 auto;
    font-family: "Times New Roman", serif;
  }

  .program-title {
    text-align: center;
    margin-bottom: 2rem;
  }

  .program-title h2,
  .program-title h3,
  .program-title h4 {
    margin-bottom: .35rem;
  }

  .day-title {
    background: #4472c4;
    color: #fff;
    padding: 12px 16px;
    border-radius: 10px;
    font-weight: 700;
    font-size: 1.2rem;
    margin: 2rem 0 1rem;
  }

  .session-title {
    background: #d9e2f3;
    color: #000;
    padding: 10px 14px;
    border-left: 5px solid #4472c4;
    border-radius: 8px;
    font-weight: 700;
    margin: 1.25rem 0 1rem;
  }

  .section-card {
    border: 1px solid #4472c4;
    border-radius: 12px;
    padding: 1rem 1rem .75rem;
    background: #fff;
    box-shadow: 0 4px 14px rgba(0,0,0,.05);
    height: 100%;
  }

  .section-head {
    border-bottom: 1px solid #d9e2f3;
    padding-bottom: .75rem;
    margin-bottom: .85rem;
  }

  .section-place {
    color: #4472c4;
    font-weight: 700;
    font-size: .95rem;
    text-transform: uppercase;
  }

  .section-time {
    font-weight: 700;
    font-size: .98rem;
    margin-top: .2rem;
  }

  .section-topic {
    font-weight: 700;
    margin-top: .25rem;
  }

  .chairs {
    font-style: italic;
    margin-top: .45rem;
    font-size: .96rem;
  }

  .presentation-list {
    margin: 0;
    padding-left: 1.2rem;
  }

  .presentation-list li {
    margin-bottom: .95rem;
    line-height: 1.35;
  }

  .authors {
    display: block;
    margin-top: .25rem;
  }

  .poster-list {
    columns: 1;
    column-gap: 1.5rem;
  }

  .poster-list li {
    break-inside: avoid;
    margin-bottom: 1rem;
  }

  @media (min-width: 992px) {
    .poster-list {
      columns: 2;
    }
  }