Better drag-and-drop file upload UI for Kirby Panel

panel.css

/* Better drag-and-drop UI for panel files */
.marginalia[href="#upload"] {
	padding: 1rem 1rem 1rem 4rem;
	position: relative;
	display: block;
	border: 2px dashed lightgrey;
	border-radius: 0.3em;
}
html[lang="en"] .marginalia[href="#upload"]:after {
	content: '. Drag & drop here to upload.';
}
.marginalia[href="#upload"]:before {
	position: absolute;
	display: block;
	left: 1rem;
	top: 50%;
	margin-top: -0.7rem;
	font-family: 'FontAwesome';
	font-size: 2rem;
	content: '\f0ee';
	color: #CCC;
}
.marginalia[href="#upload"]:hover:before,
.marginalia[href="#upload"]:focus:before {
	color: inherit;
}