.grid {
        position: relative;
      }
      
      .btn-info { 
        background: #7bb4eb;
        border: #7bb4eb;
        color: white;
        
      }

      .btn-info:hover{color:#fff;background-color:#7bb4eb;border-color:#7bb4eb}

      .item {
        display: block;
        position: absolute;
        width: 250px !important;
        height: 250px !important;
        margin: 5px;
        margin-bottom: 50px;
        z-index: 1;
        /* background: #000; */
        color: #fff;
      }
      .item.muuri-item-dragging {
        z-index: 3;
      }
      .item.muuri-item-releasing {
        z-index: 2;
      }
      .item.muuri-item-hidden {
        z-index: 0;
      }
      .item-content {
        position: relative;
        width: 100% !important;
        height: 100% !important;
      }

      #container {
        min-width: 310px;
        max-width: 800px;
        height: 400px;
        margin: 0 auto
      }
.spinner {
  width: 40px;
  height: 40px;

  position: relative;
  margin: 100px auto;
}

.double-bounce1, .double-bounce2 {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background-color: #333;
  opacity: 0.6;
  position: absolute;
  top: 0;
  left: 0;
  
  -webkit-animation: sk-bounce 2.0s infinite ease-in-out;
  animation: sk-bounce 2.0s infinite ease-in-out;
}

.double-bounce2 {
  -webkit-animation-delay: -1.0s;
  animation-delay: -1.0s;
}

@-webkit-keyframes sk-bounce {
  0%, 100% { -webkit-transform: scale(0.0) }
  50% { -webkit-transform: scale(1.0) }
}

@keyframes sk-bounce {
  0%, 100% { 
    transform: scale(0.0);
    -webkit-transform: scale(0.0);
  } 50% { 
    transform: scale(1.0);
    -webkit-transform: scale(1.0);
  }
}