zotero/scss/elements/_editableText.scss

@include comfortable {
	--editable-text-padding-inline: 4px;
	--editable-text-padding-block: 4px;
	
	--editable-text-tight-padding-inline: 4px;
	--editable-text-tight-padding-block: 2px;
}

@include compact {
	--editable-text-padding-inline: 4px;
	--editable-text-padding-block: 1px;
	
	--editable-text-tight-padding-inline: 3px;
	--editable-text-tight-padding-block: 1px;
}

editable-text {
	// Default variables overriden by max-lines, min-lines attribute
	--min-visible-lines: 1;
	--max-visible-lines: 1;

	&[tight] {
		--editable-text-padding-inline: var(--editable-text-tight-padding-inline);
		--editable-text-padding-block: var(--editable-text-tight-padding-block);
	}

	// Fun auto-sizing approach from CSSTricks:
	// https://css-tricks.com/the-cleanest-trick-for-autogrowing-textareas/
	
	display: grid;
	scrollbar-color: var(--color-scrollbar) var(--color-scrollbar-background);
	
	span {
		visibility: hidden;
		margin: 0;
		border: 1px solid transparent;
		width: fit-content;
		white-space: pre;
		padding: var(--editable-text-padding-block) var(--editable-text-padding-inline);
	}
	
	&:not([nowrap])::after {
		content: attr(value) ' ';
		visibility: hidden;
		border: 1px solid transparent;
		padding: var(--editable-text-padding-block) var(--editable-text-padding-inline);
		font: inherit;
		line-height: inherit;
		overflow: hidden;
	}
	
	&:not([nowrap])::after, &:not([nowrap]) .input {
		grid-area: 1 / 1 / 2 / 2;
		overflow-wrap: anywhere;
		white-space: pre-wrap;
		scrollbar-width: none;
	}

	&[max-lines] {
		&::after, .input {
			max-height: calc(var(--line-height) * var(--max-visible-lines));
			scrollbar-width: auto;
		}
		&::after {
			scrollbar-gutter: stable;
		}
	}
	
	.input {
		border-radius: 5px;
		
		// No focus ring for read-only fields
		&:read-only {
			--width-focus-border: 0px;
			--width-focus-outer-border: 0px;
		}

		@media not (-moz-platform: windows) {
			@include focus-ring(true);
		}
		// Do not use default Windows focus-ring
		@media (-moz-platform: windows) {
			&:focus-visible {
				outline: none;
				box-shadow: 0 0 0 var(--width-focus-border) var(--color-focus-border);
				--width-focus-border: 1px;
				--color-focus-border: var(--color-accent);
			}
		}
		// Necessary for consistent padding, even if it's actually an <input>
		-moz-default-appearance: textarea;
		
		min-height: calc(var(--line-height) * var(--min-visible-lines));
		margin: 0;
		border: 1px solid transparent;

		font: inherit;
		line-height: inherit;
		color: inherit;
		padding: var(--editable-text-padding-block) var(--editable-text-padding-inline);
	
		&:read-only, &:not(:focus) {
			appearance: none;
			background: transparent;
		}
		
		&:hover:not(:read-only, :focus) {
			background: var(--fill-quinary);
			box-shadow: 0 0 0 1px var(--fill-quinary);
		}

		&:focus {
			background: var(--material-background);
		}
		
		::placeholder {
			color: var(--fill-tertiary);
		}
	}
	&[nowrap] {
		.input:not(:focus, :hover) {
			text-overflow: ellipsis;
		}
	}
	&[hidden] {
		display: none;
	}
	textarea {
		// Per https://stackoverflow.com/a/22700700, somehow this removes an extra half-line
		// at the bottom of textarea on all platforms with non-overlay scrollbars
		overflow-x: hidden;
		
		// Match the gutters we apply to ::after
		overflow-y: scroll;
	}
}