.shapes-container {
  padding: 0;
  margin: 0;
  list-style: none;
  -ms-box-orient: horizontal;
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -moz-flex;
  display: -webkit-flex;
  display: flex;
  -webkit-flex-wrap: wrap;
  flex-wrap: wrap;
  justify-content: center;
}

.shape-item {
  background: #414141;
  padding: 5px;
  width: 300px;
  height: 400px;
  margin: 10px;
  text-align: center;
  transition-duration: 0.4s;
  box-shadow: 0 8px 16px 0 rgba(0,0,0,0.2), 0 6px 20px 0 rgba(0,0,0,0.19);
}

.shape-item:hover {
  background: #505050;
}