index.css
.k-editor-image-block{margin:1.5rem 0}.k-editor-image-block figure{line-height:0}.k-editor-image-block-wrapper img{width:100%}.k-editor-image-block-wrapper[data-responsive] img{position:absolute;top:0;right:0;bottom:0;left:0;object-fit:contain;height:100%}.k-editor-image-block-wrapper[data-responsive]{position:relative;padding-bottom:66.66%;background:#2d2e36}.k-editor-image-block-wrapper:focus{outline:0}.k-editor-image-block-wrapper:focus img{outline:2px solid rgba(66,113,174,.25);outline-offset:2px}.k-editor-image-block figcaption{display:block;margin-top:.75rem}.k-editor-image-block .k-editable-placeholder,.k-editor-image-block .ProseMirror{text-align:center;font-size:.875rem;line-height:1.5em}.k-editor-image-block-placeholder{display:flex;line-height:1;justify-content:center;align-items:center;font-style:italic;font-size:.875rem;width:100%;border:1px dashed #ddd;border-radius:3px;text-align:center;color:#bbb}.k-editor-image-block-placeholder:focus{outline:0}.k-editor-image-block-placeholder .k-button{padding:.75rem;display:flex;align-items:center;color:#000;margin:0 .5rem}.lazysrcset-icon,.lazysrcset-icon>button{width:100%;text-align:right}.lazysrcset-icon>button{display:inline-block;color:#fff;background-color:#000;padding:.25rem .5rem}