.center {
  text-align: center;
  font-size: 15px;
}

.grid-stack {
  background: inherit;
  max-width: 800px;
  margin: 0 auto;
  font-size: 0;
}
.grid-stack:hover {
  background: #22222282;
}

.grid-stack-item-content {
  max-height: 75px;
  background-repeat: no-repeat;
  background-size: 400px 300px;
  box-shadow: 0 !important;
  border: none !important;
  margin: 0 !important;
  grid-gap: 0 !important;
  max-width: 100px;
  margin-right:-14px!important;
}

.tile:hover {
  cursor:pointer;
  animation: pulse 1s ease infinite;
}

.tile:active {
  cursor:grab;
  animation: pulse2 1s ease infinite;
}

@-webkit-keyframes pulse {
  0%,5% {
    -webkit-box-shadow: 0 0 0 0 #ddd;
  }
  15% {
    -webkit-box-shadow: 0 0 0 0px #ddd;
  }
  25% {
    -webkit-box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.2);
  }
  100% {
    -webkit-box-shadow: 0 0 0 0 rgba(255, 255, 255, 0);
  }
}

@keyframes pulse {
  0% {
    -moz-box-shadow: inset 0 0 0 0 rgba(255, 255, 255, 0.2);
    box-shadow: inset 0 0 0 0 rgba(255, 255, 255, 0.2);
  }
  70% {
    -moz-box-shadow: inset 0 0 0 10px rgba(255, 255, 255, 0);
    box-shadow: inset 0 0 0 10px rgba(255, 255, 255, 0);
  }
  100% {
    -moz-box-shadow: 0 0 0 0 rgba(255, 255, 255, 0);
    box-shadow: 0 0 0 0 rgba(255, 255, 255, 0);
  }
}

@-webkit-keyframes pulse2 {
  0% {
    -webkit-box-shadow: inset 0 0 0 0px #ddd;
  }
  25% {
    -webkit-box-shadow:inset 0 0 0 0 rgba(255, 255, 255, 0.2);
  }
  100% {
    -webkit-box-shadow:inset 0 0 0 0 rgba(255, 255, 255, 0);
  }
}

@keyframes pulse2 {
  0% {
    -moz-box-shadow: inset 0 0 0 0 rgba(255, 255, 255, 0.4);
    box-shadow: inset 0 0 0 0 rgba(255, 255, 255, 0.4);
  }
  70% {
    -moz-box-shadow: inset 0 0 0 10px rgba(255, 255, 255, 0);
    box-shadow: inset 0 0 0 10px rgba(255, 255, 255, 0);
  }
  100% {
    -moz-box-shadow: 0 0 0 0 rgba(255, 255, 255, 0);
    box-shadow: 0 0 0 0 rgba(255, 255, 255, 0);
  }
}

.grid-stack-item {
  margin: 0 !important;
  padding: 0 !important;
}

.grid-stack-item-content,
.tile {
  margin: 0 !important;
  padding: 0 !important;
  box-sizing: border-box;
  display: inline-block !important;
}
.grid-stack-item-content {
  display: flex !important;
}