trilium/packages/ckeditor5-footnotes/theme/footnote.css

.ck .footnote-section {
	padding: 10px;
	margin: 1em 0;
	border: solid 1px hsl(0, 0%, 77%);
	border-radius: 2px;
	counter-reset: footnote-counter;
}

.ck .footnote-item {
	list-style: none;
	counter-increment: footnote-counter;
	margin-left: 0.5em;
	display: flex;
}

.ck .footnote-item > * {
	vertical-align: text-top;
}

.ck .footnote-back-link {
	position: relative;
	margin-right: 0.1em;
	top: -0.2em;
}

.ck .footnotes .footnote-back-link > sup {
	margin-right: 0;
}

.ck .footnote-item::before {
	content: counter(footnote-counter) ". ";
	display: inline-block;
	position: relative;
	right: 0.2em;
	min-width: fit-content;
	text-align: right;
}

.ck .footnote-content {
	display: inline-block;
	padding: 0 0.3em;
	width: 95%;
	border-radius: 2px;
	flex-grow: 1;
}

.ck .ck-widget.footnote-section > .ck-reset_all.ck-widget__type-around > .ck-widget__type-around__button_after {
	display: none; /* hides the 'insert after' button from the ckeditor widget, but displays the button inside the footnote content. */
}
.placeholder {
	padding: 2px 2px;
	outline-offset: -2px;
	line-height: 1em;
	margin: 0 1px;
}

.placeholder::selection {
	display: none;
}