.jquery-base64-image-preview-wrapper { position: relative; display: inline-block; padding: 8px; line-height: 0;  border: 1px solid #ccc; border-radius: 4px; }
.jquery-base64-image-preview-wrapper-valid-dragover { border-color: blue; }
.jquery-base64-image-preview-wrapper-invalid-dragover { border-color: darkred; }
.jquery-base64-image-preview-image { width: auto; max-width: 100%; height: auto; }
.jquery-base64-image-preview-file { position: absolute; top: 0; left: 0; width: 100%; height: 100%; opacity: 0; cursor: pointer; }