body {
  background-color: #2F0453;
}
.poster div {
  width: 500px;
  height: 500px;

  /* position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%); */
  /* border: red solid 2px; */
  background-color: #540465;

}

#box3{
  background-color: #FFAA04;
}

.poster {
    align-items: center;
    display: flex;
    justify-content: center;
    width: 100vw;
    flex-wrap: wrap;
    height: 100vh;
}