.mat-grid-list {
  max-width: 700px;
  margin: 0 auto;
  min-width: 400px;
}

.mat-grid-tile {
  outline: 1px solid lightgray;

  .mat-figure {
    flex-direction: column;
  }
}

.demo-tile-active {
  background: rgba(0, 0, 0, 0.12);
}

h2 {
  max-width: 700px;
  min-width: 400px;
  text-align: center;
  margin: 15px auto;
}