.drop-region {
  background-color: #ffd;
  border-radius: 20px;
  box-shadow: 0 0 35px rgba(0,0,0,0.05);
  width: 400px;
  padding: 60px 40px;
  text-align: center;
  cursor: pointer;
  transition: .3s;
}

  .drop-region:hover {
    box-shadow: 0 0 45px rgba(0,0,0,0.1);
  }

.image-preview {
  margin-top: 20px;
}

  .image-preview .image-view {
    display: inline-block;
    position: relative;
    margin-right: 13px;
    margin-bottom: 13px;
  }

    .image-preview .image-view img {
      max-width: 100px;
      max-height: 100px;
    }

  .image-preview .overlay {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    right: 0;
    z-index: 2;
    background: rgba(255,255,255,0.5);
  }

.drop-message {
  font-size: 18px;
}

input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
  opacity: 1;
}