@layer prose {
	.prose .zoomable {
		cursor: zoom-in;
	}

	/* Chrome outlines a focused SVG even after a tap, so a diagram would
	keep a ring when the dialog hands focus back. Keyboard focus still
	gets the site ring through :focus-visible. */
	.prose .zoomable:focus:not(:focus-visible) {
		outline: none;
	}

	/* Keep the scrollbar's space so the page does not shift sideways
	while the dialog holds the scroll. */
	html:has(.lightbox[open]) {
		overflow: hidden;
		scrollbar-gutter: stable;
	}

	.lightbox {
		width: 100vw;
		max-width: none;
		height: 100dvh;
		max-height: none;
		margin: 0;
		padding: 0;
		border: 0;
		background: transparent;
		cursor: zoom-out;
	}

	.lightbox[open] {
		display: grid;
		place-items: center;
	}

	/* The backdrop follows the page theme, so the image sits on the
	reader's chosen background instead of a fixed dark scrim. */
	.lightbox::backdrop {
		background: color-mix(in srgb, var(--color-bg) 94%, transparent);
		backdrop-filter: blur(4px);
	}

	.lightbox .lightbox-stage {
		max-width: none;
		margin: 0;
		padding: 0;
	}

	.lightbox .lightbox-stage img {
		display: block;
		max-width: min(92vw, 1200px);
		max-height: 88vh;
		border: 1px solid var(--color-border);
		border-radius: 8px;
		box-shadow:
			0 1px 2px rgb(0 0 0 / 6%),
			0 16px 48px rgb(0 0 0 / 14%);
	}

	.lightbox .lightbox-stage svg {
		display: block;
		width: auto;
		max-width: 88vw;
		height: 82vh;
	}

	.lightbox-close {
		position: fixed;
		top: 1rem;
		right: 1rem;
		width: 2.5rem;
		height: 2.5rem;
		border: 1px solid var(--color-border);
		border-radius: 50%;
		background: var(--color-surface);
		color: var(--color-text);
		font:
			1.5rem / 1 system-ui,
			sans-serif;
		cursor: pointer;
	}
}