body {
  overflow: hidden;
  position: absolute;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center; /*centers items on the line (the x-axis by default)*/
  align-items: center; /*centers items on the cross-axis (y by default)*/
}
.container {
  margin-top: -5em;
}
.item {
  text-align: center;
}