* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background-color: darkmagenta;
  color: aliceblue;
  font-family: sans-serif;
  background-image: url(https://picsum.photos/1700);
  background-size: cover;
}

#Landing {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  color: black;
}

.Timeline {
  padding: 10%;
  display: grid;
  grid-template-columns: 1fr 10% 1fr;
  grid-template-rows: repeat(4, 1fr);
}

.timeline-line {
  background: rgba(212, 81, 81, 0.2);
  box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
  backdrop-filter: blur(9px);
  -webkit-backdrop-filter: blur(9px);
  border-radius: 10px;
  grid-column-start: 2;
  grid-row-start: 1;
  grid-row-end: 5;
  justify-self: center;
  padding: 5px;
}

.item-1 {
  grid-column-start: 3;
  grid-row-start: 1;
}

.item-2 {
  grid-column-start: 1;
  grid-row-start: 2;
}

.item-3 {
  grid-column-start: 3;
  grid-row-start: 3;
}

.item-4 {
  grid-column-start: 1;
  grid-row-start: 4;
}

.timeline-item {
  background: rgba(212, 81, 81, 0.2);
  box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
  backdrop-filter: blur(9px);
  -webkit-backdrop-filter: blur(9px);
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  padding: 10px;
  align-self: center;
  justify-self: center;
  margin: 10px;
}

@media screen and (max-width: 689px) {
  .Timeline {
    grid-template-columns: 10% 1fr;
    grid-template-rows: repeat(2, 1fr);
  }

  .timeline-line {
    grid-column-start: 1;
  }
  .item-1 {
    grid-column-start: 2;
    grid-row-start: 1;
  }

  .item-2 {
    grid-column-start: 2;
    grid-row-start: 2;
  }

  .item-3 {
    grid-column-start: 2;
    grid-row-start: 3;
  }

  .item-4 {
    grid-column-start: 2;
    grid-row-start: 4;
  }
}