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Quote testimonial

One testimonial at a time: a large serif quote that rises into place a word at a time, beside a portrait that wipes in with it.

testimonialquotecarouselsocial proofanimation

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Use this component

Three ways to get Quote testimonial into one of your own projects. The first two carry the component's files with them, so nothing has to fetch this page.

Start here

Placement prompt

The whole thing: what to do, where it goes, what must not change, and every one of the component's 6 files appended underneath with the path each belongs at. Paste it into Claude Code inside the destination project — it fetches nothing and needs nothing else.

Read it first — the files are added underneath when you copy
Add Quote testimonial from my Astro Component Library to this Astro project.

Library page, for reference only:
https://astro.baysixmedia.com/components/quote-testimonial/

Place it in:
[ENTER PAGE, FILE, OR ROUTE]

Position:
[ENTER WHERE IT SHOULD APPEAR]

Every file you need is appended below, each fenced with the path it belongs at. Write them there, relative to the project root. Do not import anything from the deployed library at runtime, and do not fetch the library page — the files below are the source of truth.

Adapt its demo content, links, colors, typography, and images to this project through documented props where possible. Preserve its responsive behavior, accessibility, interaction logic, reduced-motion behavior, and support for multiple instances. Avoid changing unrelated project code.

Test it at desktop, tablet, and mobile widths. Run the project's available check and build commands. Report the files changed and any differences from the library version. Do not commit or deploy.

Install kit

The 6 files this component needs and nothing else, each fenced with the path it belongs at, followed by what the library's own verification covered and what it did not. No instructions attached — for placing it yourself, or handing it to something that has its own.

Read it first
Install kit: "Quote testimonial"
Library page: https://astro.baysixmedia.com/components/quote-testimonial/
Files: 6 required, 1 supporting

Write each block below to the path named in its header, relative to the project root. A block marked (required) is one the component does not work without; (supporting) is documentation. Nothing here needs downloading except a block that says so in as many words.

===== FILE (required): src/components/QuoteTestimonial.astro =====
---
/**
 * QuoteTestimonial — one testimonial at a time: a large serif quote that rises
 * into place a word at a time, an attribution, two supporting figures, and a
 * portrait that wipes in beside it.
 *
 * One self-contained file. No imports beyond an Astro type, no global
 * stylesheet, no npm packages, no webfonts and no network requests of its own:
 * the only things it loads are the portraits you pass in.
 *
 * The decisions that carry the weight, and why they are shaped this way:
 *
 *   - **Every testimonial is in the document.** The controller shows one and
 *     hides the rest; it never fetches, never rebuilds and never destroys
 *     content. Without script the section is simply a list of quotes, which is
 *     a perfectly good testimonial section and exactly what a crawler and a
 *     reader with no JavaScript should get.
 *
 *   - **The words are split at build time, and the motion is CSS.** Each word
 *     is wrapped in a masking span with its index on it, so the stagger is
 *     `calc(var(--qt-i) * 20ms)` rather than a timer per word. Nothing
 *     measures text at runtime, nothing writes a style per frame, and a quote
 *     of any length costs the same.
 *
 *   - **The mask is the effect.** A word rises from `translateY(100%)` inside
 *     a clipped box, so it appears from behind its own baseline rather than
 *     sliding over the line above. The 0.14em of padding on the mask is what
 *     stops descenders being shaved off — a `g` or a `y` is below the line box
 *     and would otherwise be clipped flat.
 *
 *   - **Reduced motion removes the motion, not the content.** The words are
 *     already in place, the portrait does not wipe, and changing testimonial
 *     is a swap. What it must never do is leave the quote at opacity 0, which
 *     is what a naive "turn off the animation" does to an effect whose resting
 *     state is invisible.
 *
 * Several instances can share a page: every query is scoped to the instance
 * root, ids are minted per instance, and all state lives in the controller's
 * closure.
 */
import type { ImageMetadata } from "astro";

export interface QuoteTestimonialStat {
	/** The figure itself, e.g. "65%". Set in the display serif. */
	value: string;
	/** What it measures, underneath and quieter. */
	label: string;
}

export interface QuoteTestimonialItem {
	/** The testimonial. Split into words for the reveal. */
	quote: string;
	/** Who said it. */
	name: string;
	/** Their role, company, or both. */
	role?: string;
	/** Portrait. Omitted, the frame renders as an empty tinted panel. */
	src?: string | ImageMetadata;
	/** Alternative text. Omitted or empty marks the portrait decorative. */
	alt?: string;
	/** Up to two supporting figures. More than two are ignored. */
	stats?: QuoteTestimonialStat[];
}

export interface QuoteTestimonialProps {
	/**
	 * The testimonials, in order. None, and the component renders nothing: it
	 * never supplies a testimonial, not even a placeholder one.
	 */
	items?: QuoteTestimonialItem[];
	/** Small label above the quote. */
	eyebrow?: string;
	/** Accessible name for the section. */
	label?: string;
	/** Accessible name for the two controls. */
	previousLabel?: string;
	nextLabel?: string;
	/** Whether the last testimonial wraps round to the first. */
	loop?: boolean;
	/** Advance on its own. Suppressed entirely under reduced motion. */
	autoplay?: boolean;
	/**
	 * Milliseconds each testimonial holds before the next one starts, measured
	 * start to start. Clamped to 1200–20000; the reference runs at 2200.
	 */
	interval?: number;
	/** Render the play/pause control. Only shown when autoplay can run. */
	showPauseControl?: boolean;
	/** Accessible name for that control. It does not change when pressed. */
	pauseLabel?: string;
	/** Optional extra class for project-specific layout. */
	class?: string;
	/** Element id. Also seeds the internal ids instead of a random value. */
	id?: string;
}

interface Props extends QuoteTestimonialProps {}

const {
	items = [],
	eyebrow = "In their words",
	label = "Testimonials",
	previousLabel = "Previous testimonial",
	nextLabel = "Next testimonial",
	loop = true,
	autoplay = true,
	interval = 2200,
	showPauseControl = true,
	pauseLabel = "Pause the testimonials",
	class: className,
	id,
}: Props = Astro.props;

/*
 * Normalised rather than trusted: the interval is multiplied by nothing and
 * handed to a timer, so a NaN would schedule immediately and a tiny value
 * would cycle faster than anyone can read.
 */
const safeInterval = Number.isFinite(Number(interval))
	? Math.min(20000, Math.max(1200, Number(interval)))
	: 2200;

/** Control characters are stripped first: "java\tscript:" is a scheme too. */
function stripControls(value: string): string {
	return [...value]
		.filter((character) => {
			const code = character.codePointAt(0) ?? 0;
			return code > 31 && code !== 127;
		})
		.join("");
}

/**
 * Portraits are treated as untrusted: they usually arrive from a CMS or a
 * content collection and become an attribute on every render. Only the schemes
 * that can execute are refused — `data:` is allowed, because an inline SVG is
 * a legitimate image.
 */
function safeSrc(value: unknown): string | undefined {
	if (typeof value !== "string") return undefined;
	const bare = stripControls(value.trim()).trim();
	if (bare === "") return undefined;
	if (/^(javascript|vbscript):/i.test(bare)) return undefined;
	return bare;
}

function mediaOf(item: QuoteTestimonialItem) {
	const metadata = item.src && typeof item.src === "object" ? (item.src as ImageMetadata) : undefined;
	const src = safeSrc(metadata ? metadata.src : item.src);
	if (!src) return undefined;
	return {
		src,
		width: Number.isFinite(metadata?.width) ? metadata!.width : undefined,
		height: Number.isFinite(metadata?.height) ? metadata!.height : undefined,
	};
}

const text = (value: unknown) => (typeof value === "string" ? value : "");

/*
 * A figure, split into the part that counts and the parts that do not.
 *
 * "2.8x" counts to 2.8 and keeps its x; "£0" keeps its symbol in front; "6
 * weeks" keeps the word after it. Anything with no number in it at all — "N/A",
 * "most of them" — comes back null and is simply rendered, because counting up
 * to a word is not a thing.
 *
 * The decimals are taken from what was written rather than guessed: "2.8" ticks
 * through one decimal place and "42" through none, so a figure never shows more
 * precision on the way than it does when it lands.
 */
const FIGURE = /^([^0-9]*)([0-9][0-9,]*(?:\.[0-9]+)?)(.*)$/s;

function countable(value: string) {
	const match = FIGURE.exec(value.trim());
	if (!match) return null;
	const [, prefix, digits, suffix] = match;
	const plain = digits.replace(/,/g, "");
	const target = Number(plain);
	if (!Number.isFinite(target)) return null;
	const dot = plain.indexOf(".");
	return {
		prefix,
		suffix,
		target,
		decimals: dot === -1 ? 0 : plain.length - dot - 1,
		grouped: digits.includes(","),
	};
}

/*
 * The quote is split here rather than in the browser.
 *
 * Splitting at runtime would mean reading text out of the DOM and writing
 * markup back into it on every change — work that scales with the length of
 * the quote, runs before the first paint the reader sees, and has to be undone
 * on teardown. Done at build time it is markup like any other: the stagger is
 * an index in a custom property and the browser does the rest.
 *
 * Split on whitespace, not on characters. A per-letter reveal at this size
 * reads as a slot machine rather than as speech.
 */
function words(quote: string): string[] {
	return quote.split(/\s+/).filter((word) => word !== "");
}

const list = (Array.isArray(items) ? items : []).filter(
	(item) => item && typeof item.quote === "string" && item.quote.trim() !== "",
);
const resolved = list.map((item) => ({
	words: words(text(item.quote)),
	name: text(item.name),
	role: text(item.role),
	media: mediaOf(item),
	alt: text(item.alt),
	/* Two is what the layout is built for; a third would either wrap or squeeze
	   the other two, and silently dropping it is kinder than either. */
	stats: (Array.isArray(item.stats) ? item.stats : [])
		.filter((stat) => stat && text(stat.value) !== "")
		.slice(0, 2)
		.map((stat) => ({
			value: text(stat.value),
			label: text(stat.label),
			count: countable(text(stat.value)),
		})),
}));

/*
 * Random rather than sequential: a module-level counter is shared by every
 * render in the same server process, which is fine for one page and wrong the
 * moment two pages are built in parallel and compared.
 */
const uid = id ?? `qt-${Math.random().toString(36).slice(2, 9)}`;
const statusId = `${uid}-status`;
const total = resolved.length;
const pad = (n: number) => String(n).padStart(2, "0");
---

{/* Nobody to quote, nothing to render — not even the eyebrow. */}
{total > 0 && (
<section
	class:list={["quote-testimonial", className]}
	id={id}
	data-quote-testimonial
	data-qt-loop={loop ? "1" : "0"}
	data-qt-autoplay={autoplay ? "1" : "0"}
	data-qt-interval={String(safeInterval)}
	aria-label={label}
>
	<div class="qt-stage">
		<div class="qt-text">
			<p class="qt-eyebrow">
				<span class="qt-rule" aria-hidden="true"></span>
				<span>{eyebrow}</span>
			</p>

			{/*
			    Every testimonial, in the document, always. The controller hides
			    the ones it is not showing; with no controller they are a list of
			    quotes, which is what this section is underneath the interaction.
			*/}
			<div class="qt-slides" data-qt-slides>
				{resolved.map((item, index) => (
					<figure class="qt-slide" data-qt-slide data-qt-index={String(index)}>
						<blockquote class="qt-quote">
							{item.words.map((word, wordIndex) => (
								<>
									<span class="qt-word" style={`--qt-i: ${wordIndex};`}>
										<span class="qt-word-in">{word}</span>
									</span>{" "}
								</>
							))}
						</blockquote>

						<figcaption class="qt-who">
							<span class="qt-name">{item.name}</span>
							{item.role !== "" && <span class="qt-role">{item.role}</span>}
						</figcaption>

						{item.stats.length > 0 && (
							<dl class="qt-stats">
								{item.stats.map((stat) => (
									<div class="qt-stat">
										{/*
										    `dt` is the label and `dd` the figure, which is the
										    order a definition list means and the reverse of the
										    order they are read on screen. `column-reverse` moves
										    the figure above its label without moving either of
										    them in the document.
										*/}
										<dt class="qt-stat-label">{stat.label}</dt>
										<dd
											class="qt-stat-value"
											data-qt-count={stat.count ? "" : undefined}
											data-qt-target={stat.count ? String(stat.count.target) : undefined}
											data-qt-decimals={stat.count ? String(stat.count.decimals) : undefined}
											data-qt-prefix={stat.count ? stat.count.prefix : undefined}
											data-qt-suffix={stat.count ? stat.count.suffix : undefined}
											data-qt-grouped={stat.count?.grouped ? "" : undefined}
										>
											{stat.value}
										</dd>
									</div>
								))}
							</dl>
						)}
					</figure>
				))}
			</div>
		</div>

		<div class="qt-media">
			<div class="qt-frames" data-qt-frames>
				{resolved.map((item, index) => (
					<div class="qt-frame" data-qt-frame data-qt-index={String(index)}>
						{item.media ? (
							<img
								class="qt-portrait"
								src={item.media.src}
								alt={item.alt}
								width={item.media.width}
								height={item.media.height}
								draggable="false"
								decoding="async"
							/>
						) : (
							<span class="qt-portrait qt-portrait--empty" aria-hidden="true"></span>
						)}
					</div>
				))}
			</div>

			{/*
			    Hidden until the controller reveals them. Without script there is
			    nothing to page through — every testimonial is already on screen —
			    and a control that cannot work is worse than no control.
			*/}
			<div class="qt-controls" data-qt-controls hidden>
				<p class="qt-counter" aria-hidden="true">
					<span class="qt-now" data-qt-now>{pad(1)}</span>{" "}
					<span class="qt-of">/ {pad(total)}</span>
				</p>
				<span class="qt-track" aria-hidden="true"></span>
				<button class="qt-step" type="button" data-qt-prev aria-label={previousLabel}>
					<svg viewBox="0 0 10 10" width="12" height="12" aria-hidden="true">
						<path d="M6.6 1 2.2 5l4.4 4" />
					</svg>
				</button>
				<button class="qt-step" type="button" data-qt-next aria-label={nextLabel}>
					<svg viewBox="0 0 10 10" width="12" height="12" aria-hidden="true">
						<path d="M3.4 1 7.8 5l-4.4 4" />
					</svg>
				</button>
				{showPauseControl && (
					/*
					 * The reference cycles with no way to stop it. Content that
					 * moves on its own, indefinitely, needs one — so this is an
					 * addition rather than a match, and it hides itself when
					 * there is no drift to pause.
					 */
					<button class="qt-step" type="button" data-qt-pause hidden aria-pressed="false">
						<span class="qt-a11y">{pauseLabel}</span>
						<svg class="qt-glyph qt-glyph--pause" viewBox="0 0 10 10" width="12" height="12" aria-hidden="true">
							<path d="M3.5 1v8M6.5 1v8" />
						</svg>
						<svg class="qt-glyph qt-glyph--play" viewBox="0 0 10 10" width="12" height="12" aria-hidden="true">
							<path d="M2.6 1.2v7.6L8.4 5z" />
						</svg>
					</button>
				)}
			</div>
		</div>
	</div>

	{/*
	    What changed, for anybody not watching it change. The reference has no
	    equivalent: it swaps the quote silently, so a screen reader user pressing
	    "next" is told nothing at all.
	*/}
	<p class="qt-status" id={statusId} data-qt-status role="status" aria-live="polite"></p>
</section>
)}

<script>
	/**
	 * QuoteTestimonial controller.
	 *
	 * One closure per instance. Every query is scoped to that instance's root,
	 * every listener carries an AbortController signal, and the whole thing is
	 * torn down before a client-side navigation swaps the document.
	 *
	 * It owns which testimonial is showing and nothing else. The motion is CSS:
	 * the controller adds an attribute and the stylesheet decides what that
	 * looks like, so a project that wants different timing edits a custom
	 * property rather than this file.
	 */
	interface Instance {
		destroy(): void;
	}

	function initQuoteTestimonial(root: HTMLElement): Instance | undefined {
		/* Idempotent: booting twice is a no-op, not a second set of listeners. */
		if (root.dataset.qtReady === "") return undefined;

		const slides = Array.from(
			root.querySelectorAll<HTMLElement>("[data-qt-slide]"),
		);
		const frames = Array.from(
			root.querySelectorAll<HTMLElement>("[data-qt-frame]"),
		);
		const controls = root.querySelector<HTMLElement>("[data-qt-controls]");
		const previous = root.querySelector<HTMLButtonElement>("[data-qt-prev]");
		const next = root.querySelector<HTMLButtonElement>("[data-qt-next]");
		const now = root.querySelector<HTMLElement>("[data-qt-now]");
		const status = root.querySelector<HTMLElement>("[data-qt-status]");
		if (slides.length === 0) return undefined;

		root.dataset.qtReady = "";
		const controller = new AbortController();
		const { signal } = controller;

		const loop = root.dataset.qtLoop !== "0";
		const wantsAutoplay = root.dataset.qtAutoplay !== "0";
		const interval = Number(root.dataset.qtInterval) || 2200;
		const pause = root.querySelector<HTMLButtonElement>("[data-qt-pause]");
		const reduced = window.matchMedia("(prefers-reduced-motion: reduce)");
		const count = slides.length;
		let index = 0;

		const pad = (value: number) => String(value).padStart(2, "0");

		/* ---- the figures ------------------------------------------------ */

		/*
		 * How long a figure takes to count up, and the shape of the climb.
		 *
		 * Both measured off the reference frame by frame: the value leaves zero
		 * and lands on target 860ms later, having passed 0.36 of the way at a
		 * quarter of the run, 0.64 at half and 0.89 at three quarters. That is
		 * an ease-out of about the 1.5 power — between a straight line and a
		 * quadratic, so it slows into place without the long crawl a cubic
		 * would give it.
		 */
		const COUNT_DURATION = 860;
		const countEase = (t: number) => 1 - Math.pow(1 - t, 1.5);

		const figures = Array.from(root.querySelectorAll<HTMLElement>("[data-qt-count]"));
		/*
		 * What each figure said when it was served.
		 *
		 * The last frame restores this string rather than formatting one, so a
		 * figure always comes to rest on exactly what the author wrote —
		 * whatever the browser's locale would have done to a grouped number,
		 * and whatever rounding the tween was doing on the way.
		 */
		const asWritten = new Map<HTMLElement, string>();
		for (const figure of figures) asWritten.set(figure, figure.textContent ?? "");

		let countFrame: number | undefined;

		function stopCounting() {
			if (countFrame !== undefined) window.cancelAnimationFrame(countFrame);
			countFrame = undefined;
		}

		function write(figure: HTMLElement, value: number) {
			const decimals = Number(figure.dataset.qtDecimals ?? "0");
			const body =
				figure.dataset.qtGrouped !== undefined
					? value.toLocaleString(undefined, {
							minimumFractionDigits: decimals,
							maximumFractionDigits: decimals,
						})
					: value.toFixed(decimals);
			figure.textContent = `${figure.dataset.qtPrefix ?? ""}${body}${figure.dataset.qtSuffix ?? ""}`;
		}

		function settle(scope: HTMLElement) {
			for (const figure of scope.querySelectorAll<HTMLElement>("[data-qt-count]")) {
				figure.textContent = asWritten.get(figure) ?? figure.textContent;
			}
		}

		/** Count the figures on one testimonial up from zero. */
		function countUp(slide: HTMLElement) {
			stopCounting();
			const cells = Array.from(slide.querySelectorAll<HTMLElement>("[data-qt-count]"));
			if (cells.length === 0) return;
			/* Nothing to watch climb, so it is simply already there. */
			if (reduced.matches) {
				settle(slide);
				return;
			}

			const started = performance.now();
			const step = (now: number) => {
				const progress = Math.min(1, (now - started) / COUNT_DURATION);
				if (progress >= 1) {
					countFrame = undefined;
					settle(slide);
					return;
				}
				const eased = countEase(progress);
				for (const cell of cells) write(cell, Number(cell.dataset.qtTarget ?? "0") * eased);
				countFrame = window.requestAnimationFrame(step);
			};
			countFrame = window.requestAnimationFrame(step);
		}

		/**
		 * How long the portrait takes to wipe in, read from the stylesheet.
		 *
		 * The outgoing portrait has to be removed when the wipe finishes, and
		 * the wipe's length lives in a custom property so a project can retune
		 * it. Reading it back is what stops the two drifting apart the first
		 * time somebody changes one of them.
		 */
		function wipeMs(): number {
			const raw = getComputedStyle(root).getPropertyValue("--qt-wipe-duration").trim();
			const value = parseFloat(raw);
			if (!Number.isFinite(value)) return 1000;
			return raw.endsWith("ms") ? value : value * 1000;
		}

		let leaving: HTMLElement | null = null;
		let leaveTimer: number | undefined;
		/*
		 * The first paint is not a hand-off.
		 *
		 * A wipe is one portrait replacing another, and on the first render
		 * there is nothing to replace — so it plays as a picture assembling
		 * itself out of nothing, which reads as a loading state rather than a
		 * transition. The first portrait is simply there; every one after it
		 * arrives over the one before.
		 */
		let firstRender = true;

		function clearLeaving() {
			if (leaveTimer !== undefined) window.clearTimeout(leaveTimer);
			leaveTimer = undefined;
			if (!leaving) return;
			leaving.hidden = true;
			delete leaving.dataset.qtLeaving;
			leaving.removeAttribute("aria-hidden");
			leaving = null;
		}

		/**
		 * Swap the portrait, keeping the old one underneath while it happens.
		 *
		 * The incoming portrait is revealed by a clip that runs across it, and
		 * it has to be revealed over SOMETHING. Hiding the outgoing one first
		 * reveals it over an empty panel, which reads as a cut followed by a
		 * wipe rather than as one picture replacing another.
		 */
		function swapFrames(next: number, previous: number) {
			clearLeaving();
			frames.forEach((frame, position) => {
				frame.hidden = position !== next;
			});

			const outgoing = frames[previous];
			if (!outgoing || previous === next || reduced.matches) return;

			outgoing.hidden = false;
			outgoing.dataset.qtLeaving = "";
			/* Two portraits are on screen but only one is the testimonial's. */
			outgoing.setAttribute("aria-hidden", "true");
			leaving = outgoing;
			leaveTimer = window.setTimeout(clearLeaving, wipeMs());
		}

		/**
		 * Show one testimonial and hide the rest.
		 *
		 * `hidden` rather than a class: it takes the element out of the
		 * accessibility tree and the tab order in one attribute, with no
		 * stylesheet needed to agree with it. The quote carries no focusable
		 * content today, but a project that puts a link in one gets the right
		 * behaviour without this file changing.
		 */
		function expose(elements: HTMLElement[], shown: number) {
			elements.forEach((element, position) => {
				element.hidden = position !== shown;
			});
		}

		/**
		 * Restart the word reveal.
		 *
		 * The animation is declared in CSS against `data-qt-play`, so replaying
		 * it means removing the attribute, forcing the browser to notice, and
		 * putting it back. Reading `offsetWidth` is the part that does the
		 * forcing: without it the two writes are coalesced into no change at
		 * all and the words simply stay where they are.
		 */
		function play(slide: HTMLElement) {
			if (reduced.matches) return;
			delete slide.dataset.qtPlay;
			void slide.offsetWidth;
			slide.dataset.qtPlay = "";
		}

		/* `target`, not `next`: the control is called `next`, and a parameter of
		   that name would shadow it for the whole body. */
		function show(target: number, announce: boolean) {
			const from = index;
			index = ((target % count) + count) % count;

			expose(slides, index);
			swapFrames(index, from);
			play(slides[index]);
			if (frames[index] && !firstRender) play(frames[index]);
			countUp(slides[index]);

			if (now) now.textContent = pad(index + 1);
			updateEnds();

			/*
			 * Announced, but only for an interaction. Announcing the first
			 * testimonial at boot would make every page load speak a quote
			 * nobody asked to hear.
			 */
			if (announce && status) {
				const name = slides[index].querySelector<HTMLElement>(".qt-name")?.textContent ?? "";
				status.textContent = `Testimonial ${index + 1} of ${count}${name ? `, ${name}` : ""}`;
			}
		}

		/** With looping off, the ends are dead and say so rather than just failing. */
		function updateEnds() {
			if (loop) return;
			if (previous) previous.disabled = index === 0;
			if (next) next.disabled = index === count - 1;
		}

		/* ---- autoplay ---------------------------------------------------- */

		let autoTimer: number | undefined;
		let hovering = false;
		let focused = false;
		let manuallyPaused = false;

		function autoAllowed(): boolean {
			if (!wantsAutoplay || reduced.matches) return false;
			if (manuallyPaused || document.hidden) return false;
			if (hovering || focused) return false;
			return count > 1;
		}

		function stopAuto() {
			if (autoTimer !== undefined) window.clearTimeout(autoTimer);
			autoTimer = undefined;
		}

		function scheduleAuto() {
			stopAuto();
			if (!autoAllowed()) return;
			autoTimer = window.setTimeout(() => {
				autoTimer = undefined;
				/*
				 * Silent. Announcing an advance nobody asked for, every couple
				 * of seconds, would make the live region unusable — the pause
				 * control and the pause-on-focus are what serve that reader.
				 */
				show(index + 1, false);
				scheduleAuto();
			}, interval);
		}

		function syncPause() {
			if (!pause) return;
			const usable = wantsAutoplay && !reduced.matches && count > 1;
			pause.hidden = !usable;
			pause.setAttribute("aria-pressed", manuallyPaused ? "true" : "false");
		}

		pause?.addEventListener("click", () => {
			manuallyPaused = !manuallyPaused;
			syncPause();
			scheduleAuto();
		}, { signal });

		/* Hover is a mouse affordance; a touch tap must not stop it for good. */
		root.addEventListener("pointerenter", (event) => {
			if (event.pointerType === "touch") return;
			hovering = true;
			scheduleAuto();
		}, { signal });

		root.addEventListener("pointerleave", (event) => {
			if (event.pointerType === "touch") return;
			hovering = false;
			scheduleAuto();
		}, { signal });

		root.addEventListener("focusin", () => {
			focused = true;
			scheduleAuto();
		}, { signal });

		root.addEventListener("focusout", (event) => {
			if (root.contains(event.relatedTarget as Node | null)) return;
			focused = false;
			scheduleAuto();
		}, { signal });

		document.addEventListener("visibilitychange", scheduleAuto, { signal });

		function step(delta: number) {
			if (!loop) {
				const target = index + delta;
				if (target < 0 || target > count - 1) return;
			}
			show(index + delta, true);
			scheduleAuto();
		}

		previous?.addEventListener("click", () => step(-1), { signal });
		next?.addEventListener("click", () => step(1), { signal });

		/*
		 * Arrow keys, while focus is inside the section.
		 *
		 * The reference offers the two buttons and nothing else. Once a reader
		 * is in the controls, left and right are what they will try, and it
		 * costs one listener to be right about that.
		 */
		root.addEventListener(
			"keydown",
			(event) => {
				if (event.altKey || event.ctrlKey || event.metaKey) return;
				if (event.key === "ArrowLeft") {
					event.preventDefault();
					step(-1);
				} else if (event.key === "ArrowRight") {
					event.preventDefault();
					step(1);
				}
			},
			{ signal },
		);

		/* A change of preference mid-session is honoured: the resting state is
		   the same either way, so there is nothing to undo. */
		reduced.addEventListener("change", () => {
			if (reduced.matches) {
				for (const slide of slides) delete slide.dataset.qtPlay;
				for (const frame of frames) delete frame.dataset.qtPlay;
				stopCounting();
				settle(root);
				clearLeaving();
			}
			syncPause();
			scheduleAuto();
		}, { signal });

		/* Revealed only now that there is something behind them. */
		if (controls) controls.hidden = false;

		syncPause();
		show(0, false);
		firstRender = false;
		scheduleAuto();

		function destroy() {
			/* Back to exactly the state the markup was served in, so a re-used
			   element cannot inherit a position from the previous route. */
			delete root.dataset.qtReady;
			stopCounting();
			stopAuto();
			clearLeaving();
			settle(root);
			for (const slide of slides) {
				slide.hidden = false;
				delete slide.dataset.qtPlay;
			}
			for (const frame of frames) {
				frame.hidden = false;
				delete frame.dataset.qtPlay;
			}
			if (controls) controls.hidden = true;
			if (pause) {
				pause.hidden = true;
				pause.setAttribute("aria-pressed", "false");
			}
			if (previous) previous.disabled = false;
			if (next) next.disabled = false;
			manuallyPaused = false;
			hovering = false;
			focused = false;
			if (status) status.textContent = "";
			index = 0;
			controller.abort();
		}

		/*
		 * Astro replaces the document on a client-side navigation. Detach every
		 * listener, return the section to its served state, and clear the ready
		 * flag so a re-used element can boot again.
		 */
		document.addEventListener("astro:before-swap", destroy, { once: true, signal });

		return { destroy };
	}

	const boot = () =>
		document
			.querySelectorAll<HTMLElement>("[data-quote-testimonial]")
			.forEach(initQuoteTestimonial);

	/* Astro's own <script> is a deferred module, so the DOM is already parsed
	   by the time this runs. The readyState check is for the case where this
	   file is copied into a project that inlines it some other way. */
	if (document.readyState === "loading") {
		document.addEventListener("DOMContentLoaded", boot, { once: true });
	} else {
		boot();
	}

	/* Fires on every view transition in a project using <ClientRouter />, and
	   never at all in one that does not. Registered once per module, so it
	   cannot accumulate. */
	document.addEventListener("astro:page-load", boot);
</script>

<style>
	.quote-testimonial {
		/* ---- overridable tokens -------------------------------------------
		   Set any of these on the element, from a class, an id or a wrapper
		   rule, to retune the component without touching this file. */
		--qt-ground: #f7f7f5;
		--qt-ink: #101114;
		--qt-muted: #6e6e68;
		/* The eyebrow, the rule beside it and the figures all share one accent,
		   which is most of why the section reads as a single object. */
		--qt-accent: #14352a;
		--qt-line: #e2e1dc;

		--qt-max: 75rem; /* 1200px */
		--qt-pad: clamp(1.5rem, 4.4cqi, 4rem); /* 64px at the full width */
		--qt-gap: clamp(2rem, 6cqi, 4.5rem); /* 72px */
		--qt-text-col: 35.625rem; /* 570px */
		--qt-media-col: 26.875rem; /* 430px */
		/* Where the two columns stop fitting side by side. The reference puts
		   this at 940px and so does this. */
		--qt-stack-at: 58.75rem;

		--qt-quote-size: clamp(1.75rem, 3.6cqi, 2.625rem); /* 30px → 42px */
		--qt-radius: 1.375rem; /* 22px */
		--qt-shadow:
			0 30px 60px -28px rgb(16 17 20 / 0.34),
			0 2px 6px rgb(16 17 20 / 0.06);

		/* ---- motion, all measured off the reference -----------------------
		   A word rises from a full line below itself over 680ms on an
		   exponential ease-out, each one 20ms behind the last. */
		--qt-word-duration: 680ms;
		--qt-word-stagger: 20ms;
		--qt-ease: cubic-bezier(0.16, 1, 0.3, 1);
		/*
		 * The portrait wipe, measured off the reference frame by frame: a full
		 * second, 7% of the way at a quarter of the run, 65% at half and 96% at
		 * three quarters. That is a deep S — almost still at both ends and very
		 * quick through the middle — which is why it reads as a sweep rather
		 * than a fade. An earlier pass had this at 220ms on an ease-out, from
		 * sampling only the tail of the curve, and it snapped.
		 */
		--qt-wipe-duration: 1000ms;
		--qt-wipe-ease: cubic-bezier(0.62, 0, 0.25, 1);

		box-sizing: border-box;
		container-type: inline-size;
		display: block;
		background: var(--qt-ground);
		color: var(--qt-ink);
		font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
	}

	/* `:where` keeps specificity at zero, so a destination project's own rules
	   still win where it means them to. */
	.quote-testimonial :where(*, *::before, *::after) {
		box-sizing: border-box;
	}

	.qt-stage {
		display: grid;
		grid-template-columns: minmax(0, var(--qt-text-col)) var(--qt-media-col);
		align-items: center;
		gap: var(--qt-gap);
		max-width: var(--qt-max);
		margin-inline: auto;
		padding: var(--qt-pad);
	}

	/*
	 * One column below the breakpoint, portrait first.
	 *
	 * Stacked, the portrait leads: it is the face attached to the words, and a
	 * phone screen that opens on 42px of serif with no idea who is speaking is
	 * a worse read than one that opens on the person.
	 */
	@container (max-width: 58.75rem) {
		.qt-stage {
			grid-template-columns: minmax(0, 1fr);
		}

		.qt-media {
			order: -1;
		}
	}

	/* ---- the text column ------------------------------------------------ */

	.qt-eyebrow {
		display: flex;
		align-items: center;
		gap: 0.75rem;
		margin: 0;
		color: var(--qt-accent);
		font-size: 0.656rem; /* 10.5px */
		line-height: 1.4;
		letter-spacing: 0.2em;
	}

	.qt-rule {
		flex: none;
		width: 1.625rem; /* 26px */
		height: 1px;
		background: currentColor;
	}

	.qt-slide {
		margin: 0;
	}

	.qt-slide[hidden] {
		display: none;
	}

	.qt-quote {
		margin: 1.5rem 0 0;
		color: var(--qt-ink);
		font-family: Georgia, "Times New Roman", serif;
		font-size: var(--qt-quote-size);
		line-height: 1.24;
		letter-spacing: -0.008em;
		text-wrap: pretty;
	}

	/*
	 * The mask. `overflow: hidden` is what makes a word appear from behind its
	 * own line rather than sliding in over the one above.
	 *
	 * The padding and the equal negative margin are not decoration: a line box
	 * ends at the baseline plus the descender, and clipping at the line box
	 * shaves the tail off every g, j, p, q and y. The padding grows the clip,
	 * the margin takes the space back, and the line spacing is unchanged.
	 */
	.qt-word {
		display: inline-block;
		overflow: hidden;
		vertical-align: top;
		padding-bottom: 0.14em;
		margin-bottom: -0.14em;
	}

	.qt-word-in {
		display: inline-block;
		will-change: transform;
	}

	/*
	 * Hidden only once a controller exists to reveal it. Served like this
	 * unconditionally, a reader with no JavaScript would get a section of
	 * invisible quotes — the single worst way this component could fail.
	 */
	/*
	 * A full line PLUS the mask's own padding.
	 *
	 * `100%` alone resolves against the word's line box, which leaves it
	 * starting 0.14em short of the bottom of the clip — the top of a tall
	 * letter is already showing on the first frame. Measured against the
	 * reference: 58.3px of travel on a 52.08px line, which is exactly a line
	 * plus the padding.
	 */
	.quote-testimonial[data-qt-ready] .qt-word-in {
		opacity: 0;
		transform: translateY(calc(100% + 0.14em));
	}

	.quote-testimonial[data-qt-ready] .qt-slide[data-qt-play] .qt-word-in {
		animation: qt-rise var(--qt-word-duration) var(--qt-ease)
			calc(var(--qt-i) * var(--qt-word-stagger)) both;
	}

	@keyframes qt-rise {
		from {
			opacity: 0;
			transform: translateY(calc(100% + 0.14em));
		}
		to {
			opacity: 1;
			transform: translateY(0);
		}
	}

	.qt-who {
		display: flex;
		flex-direction: column;
		gap: 0.375rem;
		margin-top: 2rem;
	}

	.qt-name {
		color: var(--qt-ink);
		font-size: 0.75rem;
		line-height: 1.3;
		letter-spacing: 0.14em;
	}

	.qt-role {
		color: var(--qt-muted);
		font-size: 0.8125rem;
		line-height: 1.4;
	}

	.qt-stats {
		display: flex;
		align-items: stretch;
		gap: 1.75rem;
		margin: 2.375rem 0 0;
	}

	.qt-stat {
		display: flex;
		/* The figure reads above its label; the document says label then figure,
		   which is what a definition list means. */
		flex-direction: column-reverse;
		gap: 0.375rem;
		min-width: 0;
	}

	/* A hairline between the two, and only between them. */
	.qt-stat + .qt-stat {
		padding-left: 1.75rem;
		border-left: 1px solid var(--qt-line);
	}

	.qt-stat-value {
		margin: 0;
		color: var(--qt-accent);
		font-family: Georgia, "Times New Roman", serif;
		font-size: clamp(1.75rem, 3.4cqi, 2.5rem);
		line-height: 1;
		letter-spacing: -0.01em;
	}

	.qt-stat-label {
		color: var(--qt-muted);
		font-size: 0.75rem;
		line-height: 1.45;
		text-wrap: pretty;
	}

	/* ---- the portrait --------------------------------------------------- */

	/*
	 * Stacked, but only with a controller running. Served like this they would
	 * all pile onto one another; in the no-script render each portrait sits in
	 * the flow under its own quote, which is the point of that render.
	 */
	.quote-testimonial[data-qt-ready] .qt-frames {
		position: relative;
		aspect-ratio: 3 / 4;
		/*
		 * The rounding and the shadow move out here once the frames are
		 * stacked, so each frame inside is a plain rectangle. The wipe then
		 * has a straight leading edge — clipping a rounded frame would round
		 * the moving edge too, and the new picture would appear to slide in as
		 * a card rather than sweep across.
		 */
		overflow: hidden;
		border-radius: var(--qt-radius);
		box-shadow: var(--qt-shadow);
	}

	.quote-testimonial[data-qt-ready] .qt-frame {
		position: absolute;
		inset: 0;
		aspect-ratio: auto;
		border-radius: 0;
		box-shadow: none;
		z-index: 1;
	}

	/* The outgoing portrait, held underneath for the length of the wipe. */
	.quote-testimonial[data-qt-ready] .qt-frame[data-qt-leaving] {
		z-index: 0;
	}

	.qt-frame {
		position: relative;
		aspect-ratio: 3 / 4;
		overflow: hidden;
		border-radius: var(--qt-radius);
		background: var(--qt-line);
		box-shadow: var(--qt-shadow);
	}

	.qt-frame[hidden] {
		display: none;
	}

	.qt-portrait {
		display: block;
		width: 100%;
		height: 100%;
		object-fit: cover;
		/* Slightly above centre: on a portrait crop, dead centre puts the chin
		   in the middle of the frame and the top of the head against the edge. */
		object-position: 50% 42%;
	}

	.qt-portrait--empty {
		background: var(--qt-line);
	}

	/*
	 * The wipe runs on the FRAME, not on the picture inside it.
	 *
	 * Clipping only the picture leaves the frame's own panel — opaque, and on
	 * top of the outgoing frame — covering the very thing the wipe is supposed
	 * to reveal it over. The result was a new picture arriving over a blank
	 * card instead of over the previous one. Clipping the whole layer means
	 * everything that has not arrived yet is simply not painted, and the
	 * portrait underneath shows through until it does.
	 */
	.quote-testimonial[data-qt-ready] .qt-frame[data-qt-play] {
		animation: qt-wipe var(--qt-wipe-duration) var(--qt-wipe-ease) both;
	}

	@keyframes qt-wipe {
		from {
			clip-path: inset(0 0 0 100%);
		}
		to {
			clip-path: inset(0 0 0 0);
		}
	}

	/* ---- the controls --------------------------------------------------- */

	.qt-controls {
		display: flex;
		align-items: center;
		gap: 1.25rem;
		margin-top: 1.4375rem;
	}

	.qt-controls[hidden] {
		display: none;
	}

	.qt-counter {
		flex: none;
		margin: 0;
		color: var(--qt-muted);
		font-size: 0.75rem;
		line-height: 1.4;
		letter-spacing: 0.1em;
	}

	.qt-now {
		color: var(--qt-ink);
		font-weight: 600;
	}

	/* Takes the space the counter and the buttons do not. */
	.qt-track {
		flex: 1;
		height: 1px;
		background: var(--qt-line);
	}

	.qt-step {
		display: inline-flex;
		align-items: center;
		justify-content: center;
		flex: none;
		width: 2.5rem;
		height: 2.5rem;
		padding: 0;
		border: 1px solid var(--qt-line);
		border-radius: 50%;
		background: none;
		color: var(--qt-ink);
		cursor: pointer;
		-webkit-tap-highlight-color: transparent;
	}

	.qt-step svg {
		fill: none;
		stroke: currentColor;
		stroke-width: 1.4;
		stroke-linecap: round;
		stroke-linejoin: round;
	}

	.qt-step:hover {
		border-color: var(--qt-ink);
	}

	.qt-step:focus-visible {
		outline: 2px solid var(--qt-accent);
		outline-offset: 2px;
	}

	.qt-step:disabled {
		opacity: 0.4;
		cursor: default;
	}

	.qt-step:disabled:hover {
		border-color: var(--qt-line);
	}

	.qt-glyph {
		fill: none;
		stroke: currentColor;
		stroke-width: 1.4;
		stroke-linecap: round;
		stroke-linejoin: round;
	}

	.qt-glyph--play {
		fill: currentColor;
		stroke: none;
	}

	/* Pressed means "the cycle is paused", so the control offers play. */
	.qt-step[aria-pressed="false"] .qt-glyph--play,
	.qt-step[aria-pressed="true"] .qt-glyph--pause {
		display: none;
	}

	.qt-step[hidden] {
		display: none;
	}

	/* Announced, never shown. */
	.qt-a11y,
	.qt-status {
		position: absolute;
		width: 1px;
		height: 1px;
		margin: -1px;
		padding: 0;
		overflow: hidden;
		clip-path: inset(50%);
		white-space: nowrap;
	}

	/* ---- reduced motion --------------------------------------------------
	   The words are already where they belong and the portrait does not wipe.
	   The important half of this is the first rule: the resting state of the
	   reveal is invisible, so switching the animation off without also
	   restoring opacity would hide the quote from exactly the readers who
	   asked for less movement. */
	@media (prefers-reduced-motion: reduce) {
		.quote-testimonial[data-qt-ready] .qt-word-in {
			opacity: 1;
			transform: none;
			will-change: auto;
		}

		.quote-testimonial[data-qt-ready] .qt-slide[data-qt-play] .qt-word-in,
		.quote-testimonial[data-qt-ready] .qt-frame[data-qt-play] {
			animation: none;
		}
	}
</style>

===== END src/components/QuoteTestimonial.astro =====

===== FILE (supporting): src/components/QuoteTestimonial.md =====
# Quote testimonial

One testimonial at a time. A large serif quote rises into place a word at a
time beside a portrait that wipes in with it, under an eyebrow, over an
attribution and two supporting figures.

Catalog page: `/components/quote-testimonial`

## Purpose

For the single testimonial a page can afford to give real room to — the one
with a name, a face and a number attached. It cycles on its own, one voice at a
time, and stops the moment you put a pointer on it or tab into it.

Use something else for a wall of short quotes. This design spends its space on
one, and three of these stacked would be a page of nothing but praise.

## Files required

**`QuoteTestimonial.astro`** — one file, the whole component.

- No imports except `import type { ImageMetadata } from "astro"`, which is a
  type and disappears at build time.
- No npm packages, no animation library, no React, no Tailwind, no CSS reset.
- No global stylesheet. Every colour, size and duration is declared on the
  component's own root element as a `--qt-*` custom property, so it inherits
  nothing from the host page and leaks nothing back.
- No webfonts and **no network requests of its own**. The only things it loads
  are the portraits you pass in.
- The only assumption about the host is that Astro compiles `.astro` files.

`QuoteTestimonial.md` — this file. Documentation, not required to run.

The catalog demo uses five portraits in `public/quote-testimonial/`, passed with
its demo testimonials from the registry's demo `props` — none of them is built
into the component.

## Basic usage

```astro
---
import QuoteTestimonial from "../components/QuoteTestimonial.astro";
import portrait from "../assets/marguerite.jpg";
---

<QuoteTestimonial
  eyebrow="In their words"
  label="What our clients say"
  items={[
    {
      quote: "We arrived with a brief rewritten four times. They read it once and we began again.",
      name: "Marguerite Okonjo",
      role: "Director of Brand, Halden & Rowe",
      src: portrait,
      alt: "Marguerite Okonjo",
      stats: [
        { value: "6 weeks", label: "brief to launch" },
        { value: "2x", label: "enquiries in the first month" },
      ],
    },
  ]}
/>
```

No client directive, no wrapper, no init call — the component ships its own
module script and boots itself.

It paints its own background and reaches both edges, so give it the full width
of the page.

## Props

Everything has a default, and none of the defaults is a testimonial. With no
`items` — or none with a non-empty `quote` — it renders **nothing at all**, not
even the eyebrow. It never supplies a placeholder quote, name or figure.

| Prop | Type | Default | What it does |
| :--- | :--- | :--- | :--- |
| `items` | `QuoteTestimonialItem[]?` | `[]` | The testimonials, in order. |
| `eyebrow` | `string?` | `"In their words"` | The small label above the quote. |
| `label` | `string?` | `"Testimonials"` | Accessible name for the section. |
| `previousLabel` | `string?` | `"Previous testimonial"` | Accessible name for the back control. |
| `nextLabel` | `string?` | `"Next testimonial"` | Accessible name for the forward control. |
| `loop` | `boolean?` | `true` | Whether the last testimonial wraps to the first. With it off, the controls disable at the ends. |
| `autoplay` | `boolean?` | `true` | Advance on its own. Suppressed entirely under reduced motion. |
| `interval` | `number?` | `2200` | Milliseconds each testimonial holds, measured start to start. Clamped to `1200`–`20000`. |
| `showPauseControl` | `boolean?` | `true` | Render the play/pause control. Only shown when autoplay can actually run. |
| `pauseLabel` | `string?` | `"Pause the testimonials"` | Accessible name for that control. `aria-pressed` carries the state, so the name does not change. |
| `class` | `string?` | — | Extra class on the root, for project-specific layout. |
| `id` | `string?` | — | Element id. Also seeds the internal ids instead of a random value. |

### One testimonial

| Field | Type | What it does |
| :--- | :--- | :--- |
| `quote` | `string` | The testimonial. Split into words at build time for the reveal. |
| `name` | `string` | Who said it. |
| `role` | `string?` | Their role, company, or both. |
| `src` | `string \| ImageMetadata?` | Portrait. Omitted, the frame renders as an empty tinted panel. A `javascript:` or `vbscript:` value renders no image at all. |
| `alt` | `string?` | Alternative text. Omitted or empty marks the portrait decorative. |
| `stats` | `{ value, label }[]?` | Up to two supporting figures. A third is dropped rather than allowed to break the row. |

```ts
import type { QuoteTestimonialProps, QuoteTestimonialItem } from "../components/QuoteTestimonial.astro";
```

### No slots

The quote is split into words at build time, which means the component has to
own the text rather than take arbitrary markup. A slot would either skip the
reveal or try to walk somebody else's DOM.

## Behaviour

| Input | What happens |
| :--- | :--- |
| Nothing | It advances every `interval`, wrapping at the end. |
| Pointer over it, or focus inside it | The cycle holds, and resumes when you leave. |
| The pause control | Holds it until pressed again. `aria-pressed` carries the state. |
| Switching tabs | The cycle stops and resumes with the document. |
| **Next** / **Previous** | Changes testimonial and restarts the clock, so a manual step is never landed on by an advance. |
| <kbd>←</kbd> / <kbd>→</kbd> with focus inside the section | The same, without reaching for the buttons. |
| Reaching either end | Wraps, unless `loop` is off, in which case the control disables. |
| Any change | The figures count up from zero; the labels swap at once. |
| Any change | Announced to assistive technology as "Testimonial 3 of 5, *name*". |

### The reveal

Each word is wrapped at build time in a masking span carrying its index, so the
whole effect is two CSS rules and a keyframe:

- a word starts a full line plus the mask's padding below its resting place, at
  `opacity: 0`;
- it rises over **680ms** on `cubic-bezier(0.16, 1, 0.3, 1)`;
- each word starts **20ms** after the one before it.

Nothing is measured at runtime and nothing is written per frame. A quote of
forty words costs what a quote of four costs.

The mask is the part worth understanding. `overflow: hidden` on the wrapper is
what makes a word appear from behind its own line rather than slide over the
line above — and the `0.14em` of padding on that wrapper, cancelled by an equal
negative margin, is what stops the clip shaving the tails off every `g`, `j`,
`p`, `q` and `y`.

### The portrait

The incoming portrait is revealed by a clip running across it over **1000ms** on
`cubic-bezier(0.62, 0, 0.25, 1)` — almost still at both ends and very quick
through the middle, which is what makes it read as a sweep rather than a fade.

The outgoing portrait is held underneath for exactly that long, and the clip
runs on the whole incoming **layer** rather than on the picture inside it. Both
halves of that matter. Hide the old one first and the new one is revealed over
an empty panel; clip only the picture and the new layer's own panel — opaque,
and on top — covers the old picture just as thoroughly. Either way you get a cut
followed by a wipe instead of one picture sweeping over another.

The old portrait is `aria-hidden` while it waits, so only one of the two is ever
the testimonial's. The rounding and the shadow sit on the container while the
frames are stacked, so the wipe's leading edge stays straight — clipping a
rounded frame would round the moving edge too, and the new picture would appear
to slide in as a card rather than sweep across.

**The first portrait does not wipe.** A wipe is one picture replacing another,
and on the first paint there is nothing to replace — played there it reads as a
loading state rather than a transition. The opening portrait is simply present;
every one after it arrives over the one before. The quote still rises on that
first paint, because that is the testimonial arriving rather than one
testimonial replacing another.

The wipe's length lives in `--qt-wipe-duration` and the controller reads it
back, so retuning the token moves the hand-off with it.

### The figures

Each figure counts up from zero over **860ms** on an ease-out of about the 1.5
power — between a straight line and a quadratic, so it slows into place without
the long crawl a cubic would give it. The labels underneath do not animate;
they swap with the rest of the card.

Only the number moves. `2.8x` keeps its `x`, `£0` keeps its symbol in front and
`6 weeks` keeps the word after it, because the value is split into prefix,
number and suffix when it is rendered. A figure with no number in it at all is
simply printed.

Decimals come from what you wrote: `2.8` ticks through one decimal place and
`42` through none, so a figure never shows more precision on the way up than it
does when it lands. The final frame restores your exact string rather than
formatting one, so grouping and rounding can never drift.

## Accessibility

- The section is a landmark with an accessible name, each testimonial is a
  `<figure>`, the quote is a `<blockquote>` and the attribution is a
  `<figcaption>`. The figures are a `<dl>`.
- Two real `<button>` elements, 40×40, with accessible names. They are the only
  tab stops.
- <kbd>←</kbd> and <kbd>→</kbd> work while focus is inside the section.
- **Changes you asked for are announced.** A polite live region says which
  testimonial is showing and who it is by. It is silent at boot, and silent on
  automatic advances: announcing a new quote every couple of seconds, unasked,
  would make the region unusable. Focus pauses the cycle, so a reader who tabs
  in is not read a moving target.
- **The cycle can be stopped.** A real `<button>` with `aria-pressed`, plus
  pause on hover and on focus. Content that moves on its own indefinitely needs
  a way to stop it; the reference has none.
- The hidden testimonials carry `hidden`, so they are out of the accessibility
  tree and out of the tab order — not merely invisible.
- Focus rings are drawn outside the controls, where nothing clips them.

## Reduced motion

Under `prefers-reduced-motion: reduce` **it does not advance on its own at
all** — the pause control is not rendered either, because there is nothing to
pause. The words are simply in place, the figures are simply at their value,
the portrait does not wipe, and changing testimonial by hand is a swap.

The important half of that is the resting state. This effect's natural rest is
`opacity: 0` — switching the animation off without also restoring opacity would
hide every quote from exactly the readers who asked for less movement. The
stylesheet restores both opacity and transform, and it is checked.

## Without JavaScript

Every testimonial renders, in order, one after another. The section becomes a
list of quotes, which is a perfectly good testimonial section.

- The words are at full opacity and untransformed. The hidden state is applied
  only under `[data-qt-ready]`, which the controller sets.
- The figures are the values you wrote. They are rendered into the markup and
  the controller counts up **to** them, rather than being written by script —
  so with no script they are simply correct.
- The controls are not rendered at all — `hidden`, and `display: none` besides,
  so they cannot be focused or reached by <kbd>Tab</kbd>.
- No horizontal overflow.

## Content length

- **Quote** — 15 to 30 words. It is set large by design; at about 40 the column
  runs taller than the portrait beside it and the two stop reading as a pair.
- **Role** — one line. It wraps rather than truncating.
- **Stat value** — three or four characters. `6 weeks` fits; a sentence does
  not.
- **Stat label** — three or four words, and it wraps under its figure.

## Sizing

Two columns of `570px` and `430px` with a `72px` gap above 940px; one column
below it, portrait first. The quote runs from 42px down to 28px, the figures
from 40px down, both on container queries against the section rather than the
viewport — so it behaves the same dropped into a narrower column.

Retune from CSS without touching the file:

```css
.my-section .quote-testimonial {
  --qt-ground: #fff;
  --qt-accent: #3a2a7c;
  --qt-quote-size: clamp(1.5rem, 3cqi, 2.25rem);
  --qt-word-stagger: 34ms;   /* a slower read */
  --qt-radius: 0;
}
```

## Differences from the reference

Rebuilt from a Framer page, measured rather than copied. The grid, the type
scale, the palette, the frame and the timing of the reveal are all matched to
measurements of the original. What differs:

- **The copy and the portraits are original.** Nothing of the reference's text
  or imagery is reproduced; the demo portraits are abstract figures drawn for
  this library.
- **It is responsive on container queries**, and the type is fluid between the
  two ends rather than switching at one breakpoint.
- **Changes are announced.** The reference swaps the quote silently, so a
  screen reader user pressing *next* is told nothing at all.
- **Arrow keys work.** The reference offers the two buttons and nothing else.
- **It works without script**, as a list of quotes. The reference renders one
  testimonial and no way to reach the others.
- **It can be paused.** The reference cycles indefinitely with no control, no
  pause on hover and no pause on focus.
- The reference sets its quote in Noto Serif and its supporting text in Inter,
  both webfonts. This uses the platform serif and system stack, because a
  component in this library fetches nothing.
- The reference's first word begins about 75ms after the click; this one starts
  at about 30ms. The gap is framework overhead on their side rather than a
  designed delay, so it was not reproduced.

===== END src/components/QuoteTestimonial.md =====

===== FILE (required): public/quote-testimonial/portrait-1.svg =====
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 600 800" width="600" height="800" role="img">
  <defs><linearGradient id="g0" x1="0" y1="0" x2="0.4" y2="1">
    <stop offset="0" stop-color="#1d4f3f"/><stop offset="1" stop-color="#0c2a22"/></linearGradient></defs>
  <rect width="600" height="800" fill="url(#g0)"/>
  <circle cx="452" cy="150" r="40" fill="#f2c877" opacity="0.9"/>
  <circle cx="300" cy="330" r="116" fill="#e8e3d6" opacity="0.94"/>
  <path d="M148 800c0-98 68-168 152-168s152 70 152 168z" fill="#e8e3d6" opacity="0.94"/>
</svg>

===== END public/quote-testimonial/portrait-1.svg =====

===== FILE (required): public/quote-testimonial/portrait-2.svg =====
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 600 800" width="600" height="800" role="img">
  <defs><linearGradient id="g1" x1="0" y1="0" x2="0.4" y2="1">
    <stop offset="0" stop-color="#c8623a"/><stop offset="1" stop-color="#6d2a17"/></linearGradient></defs>
  <rect width="600" height="800" fill="url(#g1)"/>
  <g stroke="#f7efe2" stroke-width="3" opacity="0.35" fill="none"><path d="M60 110h480"/><path d="M60 152h480"/></g>
  <circle cx="300" cy="330" r="116" fill="#f7efe2" opacity="0.94"/>
  <path d="M148 800c0-98 68-168 152-168s152 70 152 168z" fill="#f7efe2" opacity="0.94"/>
</svg>

===== END public/quote-testimonial/portrait-2.svg =====

===== FILE (required): public/quote-testimonial/portrait-3.svg =====
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 600 800" width="600" height="800" role="img">
  <defs><linearGradient id="g2" x1="0" y1="0" x2="0.4" y2="1">
    <stop offset="0" stop-color="#2f4b7c"/><stop offset="1" stop-color="#12203a"/></linearGradient></defs>
  <rect width="600" height="800" fill="url(#g2)"/>
  <rect x="96" y="120" width="408" height="4" rx="2" fill="#9db4d6" opacity="0.5"/>
  <circle cx="300" cy="330" r="116" fill="#dfe7f2" opacity="0.94"/>
  <path d="M148 800c0-98 68-168 152-168s152 70 152 168z" fill="#dfe7f2" opacity="0.94"/>
</svg>

===== END public/quote-testimonial/portrait-3.svg =====

===== FILE (required): public/quote-testimonial/portrait-4.svg =====
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 600 800" width="600" height="800" role="img">
  <defs><linearGradient id="g3" x1="0" y1="0" x2="0.4" y2="1">
    <stop offset="0" stop-color="#6b4a86"/><stop offset="1" stop-color="#2a1c3c"/></linearGradient></defs>
  <rect width="600" height="800" fill="url(#g3)"/>
  <circle cx="140" cy="146" r="30" fill="#f0d98c" opacity="0.85"/>
  <circle cx="300" cy="330" r="116" fill="#efe6f5" opacity="0.94"/>
  <path d="M148 800c0-98 68-168 152-168s152 70 152 168z" fill="#efe6f5" opacity="0.94"/>
</svg>

===== END public/quote-testimonial/portrait-4.svg =====

===== FILE (required): public/quote-testimonial/portrait-5.svg =====
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 600 800" width="600" height="800" role="img">
  <defs><linearGradient id="g4" x1="0" y1="0" x2="0.4" y2="1">
    <stop offset="0" stop-color="#b08a3e"/><stop offset="1" stop-color="#4a3413"/></linearGradient></defs>
  <rect width="600" height="800" fill="url(#g4)"/>
  <path d="M0 690c120-30 200 22 300 8s180-52 300-22v124H0Z" fill="#3a280f" opacity="0.3"/>
  <circle cx="300" cy="330" r="116" fill="#fbf5e6" opacity="0.94"/>
  <path d="M148 800c0-98 68-168 152-168s152 70 152 168z" fill="#fbf5e6" opacity="0.94"/>
</svg>

===== END public/quote-testimonial/portrait-5.svg =====

--- VERIFIED IN THE COMPONENT LIBRARY ---
Production-ready in the library.
Verified 2026-09-17 at 1440, 1280, 1024, 940, 834, 768, 640, 390, 320px.
Passed: full-page context, keyboard, no javascript, reduced motion, two instances, no overflow, declarations corroborated, lifecycle.
Library source fingerprint: sha256:4ecb93a29df86e9d70b83ac337a8e3e3ea9403cd14469b39b8d77abd034d3dbd — MATCHES the files below.

--- NOT PROVEN ---
- Nothing outstanding in the library's own checks.

--- WHAT THIS DOES NOT CERTIFY ---
Verification was performed on the unmodified component, in an isolated fixture, in the
library. It says nothing about this project's CSS, routes, layout or data, and nothing
about the component once you adapt it. A verified component is a good starting point,
not a guarantee about the installation you are about to build.

--- TEST IN THIS PROJECT AFTER INSTALLING OR CUSTOMISING ---
- Horizontal overflow at 1440, 1280, 1024, 834, 390 and 320px.
- Keyboard operation end to end, including visible focus.
- The no-JavaScript render.
- prefers-reduced-motion: reduce.
- Two instances on one page, if this project renders more than one.
- If this project uses <ClientRouter />: teardown and reinitialisation across a real navigation.

Component reference

A fragment for a request you write yourself, e.g. “I want to add [paste] to Section 3 of my homepage.” It names the component, links its page, and fixes what must not change — the design build and its effects — while leaving branding and content open. It does not carry the code.

Read it first
“Quote testimonial” from my Astro Component Library:
https://astro.baysixmedia.com/components/quote-testimonial/

Use the existing library component as the implementation source. Preserve its design structure, layout, proportions, spacing system, responsive behavior, visual effects, animations, transitions, hover states, interactions, and accessibility.

The copy, colors, typography, images, and other content may be adapted to match the destination website. Do not redesign, simplify, or reinterpret the component’s underlying design build or effects.

Component readiness

Judged on recorded evidence, not on how it looks in the frame above. A description of a component is not a result.

Interactivity
Ships script
Profile
core only
Installation files
6 required + 1 supporting
Verified
2026-09-17
Client navigation
End-to-end passed against a real ClientRouter
Source fingerprint
Matches the verified source
Production ready
Yes

Production-ready component

Every required check passed against the code below, and the recorded fingerprint still matches it.

Verified 2026-09-17 at 1440, 1280, 1024, 940, 834, 768, 640, 390, 320px

  • Full-page contextpass
  • Keyboardpass
  • No JavaScriptpass
  • Reduced motionpass
  • Two instancespass
  • No overflowpass
  • Declarations corroboratedpass
  • Lifecyclepass
33 verification notes
  • Fingerprint re-recorded 2026-09-24 (Step 13, content safety) after a no-behaviour content change, following the precedent above: its built-in placeholder testimonial (shown when `items` was omitted) was removed; `items` now defaults to none and the component renders nothing without it. Style and script blocks are byte-identical to the verified revision. Evidence for keeping this record: every preview, integration-test and template page was built before and after the change and compared — identical apart from per-build random ids — so each check below still describes what renders with the catalog's configuration. The new no-data behaviour is pinned by rendering tests in src/lib/content-safety.test.ts rather than by a fixture, and was checked in Chromium at 320, 390, 768 and 1440 (no overflow, no console errors, no duplicate ids, nothing rendered). No new full verification run was performed.
  • Every check below was run against the production build served by `astro preview`, not the dev server.
  • Rebuilt from a reference page by measurement, not by copying. Its own injected stylesheet and computed styles were read at 1440px and reproduced: a 570px + 430px grid with a 72px gap and 64px padding, centred on a 1200px stage; quote 42px/52.08px at -0.008em in a serif; eyebrow 10.5px at 0.2em beside a 26x1 rule, both in #14352a; name 12px at 0.14em, role 13px in #6e6e68; figures 40px serif in #14352a over 12px labels in #6e6e68; frame 3:4 at a 22px radius on #e2e1dc with `0 30px 60px -28px rgb(16 17 20 / .34), 0 2px 6px rgb(16 17 20 / .06)`; ground #f7f7f5, ink #101114; controls 40x40 circles on a 1px #e2e1dc border. Measured on the rebuild: identical to the pixel on every one of those except the padding, which is fluid here and computes to 63.36px at 1440 against a fixed 64.
  • The word reveal was measured frame by frame rather than guessed at. Each word travels one full line plus the mask's padding - 58.33px against a 52.08px line - and the displacement decays by a constant 0.737 per 30.5ms frame, which is a pure exponential with a 100ms time constant and no overshoot. Normalised against a 674ms run it matches an exponential ease-out within 0.02 at every sampled point: measured 0.381, 0.818, 0.949 and 0.988 of the way home against 0.438, 0.838, 0.955 and 0.988 for cubic-bezier(0.16, 1, 0.3, 1). That curve and a 680ms duration are what the component uses.
  • The stagger was solved per word rather than eyeballed. Inverting the decay for each word's displacement in a single frame gives start times of 76, 96, 116 and 134ms in one sample and 74, 95, 115, 135, 155 and 173ms in another: 20ms apart, consistently, with the first word about 75ms after the click. The rebuild measures 19 to 20ms between consecutive words.
  • One correction was made after the first measurement of the rebuild: the words were travelling 52.1px against the reference's 58.3px, because `translateY(100%)` resolves against the word's own line box rather than the padded mask around it. Changed to `calc(100% + 0.14em)`, which is a line plus the padding and matches.
  • CORRECTED. An earlier pass recorded the portrait wipe as roughly 190ms and built it at 220ms on an ease-out. That was measured from a sample begun 39ms into a wipe that was already 99 per cent finished, so it caught the tail and called it the curve. Measured properly from the frame the clip leaves 100 per cent: 999ms on both of two runs, covering 0.072 of the distance at a quarter of the run, 0.657 at half and 0.956 at three quarters - a deep S, nearly still at both ends and very quick through the middle. Fitted to cubic-bezier(0.62, 0, 0.25, 1), which gives 0.086, 0.648 and 0.954 at those points. Re-measured on the rebuild: 1008ms at 0.083, 0.633 and 0.950. The portrait carries no scale change on either side.
  • CORRECTED. An earlier pass recorded the reference as having no autoplay. That was a broken test, not a finding: it held a reference to the quote element across a seven-second wait and compared its text afterwards, and the reference re-renders by replacing that node - so the held node was detached and could never change. Re-tested by re-querying each sample and watching the counter instead: it advances on its own every 2162, 2172, 2276 and 2147ms and wraps 05 to 01. The user's recording showed the same thing, three advances in 7.1 seconds with no pointer near the controls.
  • Responsive at ten widths from 1440 down to 320. Two columns at 1440, 1280 and 1024; one column from 940 down, portrait first, which is the reference's own breakpoint. Quote 42px at the top end down to 28px at 320. `scrollWidth === clientWidth` at every width, and the controls are 40x40 at every width. The type is fluid between the ends and the query is a container query rather than a viewport one, so the section behaves the same dropped into a narrower column - both deliberate departures from the reference, which switches at one viewport breakpoint and holds 42px until it does.
  • Keyboard, driven for real: exactly two tab stops, Previous then Next, each with a visible 2px focus ring in #14352a at a 2px offset. Enter and Space both step, ArrowRight and ArrowLeft step while focus is inside the section, and five further presses from index 2 wrap correctly back to index 2 of five. The reference has no key handling at all.
  • Every change is announced through a polite live region - "Testimonial 3 of 5, <name>" - and the region is silent at boot so a page load never speaks a quote unprompted. The reference swaps its quote silently.
  • No JavaScript: all five testimonials render in order as a list of quotes, the controls are not rendered at all, the first Tab leaves the section entirely, and a programmatic focus() on the hidden control fails because it is `display: none`. The words render at opacity 1 with no transform - the hidden state is applied only under `data-qt-ready`, which is what stops a reader without script seeing a section of invisible quotes.
  • Reduced motion: words at opacity 1 with no transform and no animation, portrait clip-path none, and changing testimonial still works - index moved 0 to 1 with the motion off. The resting state of this effect is invisible, so the check that matters is that opacity is restored and not merely that the animation is suppressed; both were read from computed style.
  • Two instances on one page are independent: advancing the first moved it to index 1 while the second stayed at 0, and the second instance's `loop: false` disables its back control at the start while the first wraps. Zero duplicate ids across six generated ids, no page overflow.
  • Lifecycle: the ten-step run was scored by the repo's own evaluateLifecycleRun(), unmodified, which returned pass with no failures. At astro:before-swap both signal-bearing registrations were aborted, zero were live, no teardown attribute survived and zero timers were live. After navigating, the sentinel and the single unchanged navigation entry proved the transition was client-side, both instances re-initialised, and one input produced exactly one response. A second navigation left live registrations at 2, live controllers at 2 and timers at 0.
  • The probe counts ready roots with a selector hard-coded to two other components' attributes, and a profile-less entry carries no driver contract. Only that selector was adapted in the injected copy, and the root and teardown selectors were supplied through the fixture contract at run time. Nothing in the repo was edited and the pass/fail rules were used exactly as they are.
  • Install kit confirmed from the component's own page: seven file blocks, all seven carried inline with their destination paths - the component, its README and the five portraits - with zero blocks asking the reader to fetch anything, and the verification summary attached.
  • Zero console errors and zero off-origin requests on the preview route and the fixture route.
  • The demo copy and the portraits are original to this library. Nothing of the reference's text or imagery is reproduced, and the portraits are abstract figures drawn for it. The reference sets its type in two webfonts; this uses the platform serif and system stack, because a component here fetches nothing - so the letterforms differ even where every measurement matches.
  • A second pass added the counting figures, from a user recording of the reference that showed them climbing. Measured frame by frame off that recording: a figure leaves zero and lands on target 860ms later, having covered 0.357 of the distance at a quarter of the run, 0.643 at half and 0.893 at three quarters - an ease-out of about the 1.5 power, between a straight line and a quadratic. The labels do not animate; they swap with the rest of the card, which the recording also shows. Re-measured on the rebuild with the same method: 818ms, and 0.341, 0.634 and 0.854 at the same three points.
  • Only the number counts. The value is split into prefix, number and suffix when it is rendered, so "2.8x" keeps its x and "6 weeks" keeps its word; a value with no number in it is printed as written. Decimals are taken from what was authored rather than guessed. The authored string is rendered into the markup and the controller counts UP to it, which is what keeps the no-script render correct - verified with scripting disabled: "6 weeks", "2x", "41%", "9", "3 pages", "1.4s", exactly as written.
  • The counting loop is an animation frame rather than a timer, so the lifecycle probe would not see it leak. Tested directly instead: a count was interrupted mid-flight at 8 of 41 by dispatching astro:before-swap, after which every figure was restored to its authored string, was still unchanged 700ms later - proving the frame was cancelled and not merely ignored - and the ready flag was cleared with all five testimonials visible again.
  • Reduced motion suppresses the count as well as the reveal: the figures are at their value on the frame the testimonial changes, and stay there. Turning the preference on mid-session stops any run in flight and settles every figure.
  • A third pass added the autoplay the corrected test revealed, at a 2200ms cadence against the reference's measured mean of 2189. Re-measured on the rebuild: 2225, 2206 and 2211ms between advances. A manual step restarts the clock, so pressing next is never immediately followed by an advance.
  • The same pass fixed what made the hand-off look abrupt. The reference keeps BOTH portraits on screen while the clip runs - the incoming one is revealed over the outgoing one rather than over the empty panel behind it - which is visible as two img elements in the media column for the length of the wipe and one before and after. This now does the same: measured 166 consecutive frames with two portraits visible, the outgoing one held underneath at a lower z-index and aria-hidden, removed when the wipe ends. The controller reads the wipe length back out of --qt-wipe-duration so the hold and the animation cannot drift apart.
  • Autoplay is pausable, which the reference is not: it holds under the pointer, holds while focus is inside the section, stops with the document hidden, and has a real button carrying aria-pressed. Verified: held across five seconds of hover, resumed on leaving, held across five seconds after the control was pressed. Content that moves on its own indefinitely needs a way to stop it, and this is an addition rather than a match.
  • Under reduced motion it does not advance at all - no change across six seconds - and the pause control is not rendered, because there is nothing to pause. The no-script render is unaffected by any of it: the five portraits sit in the flow at five distinct offsets rather than stacked, position relative rather than absolute, no control rendered, no page overflow. The stacking that the cross-wipe needs is applied only under data-qt-ready.
  • The autoplay timer is a timeout, which the lifecycle evaluator does not inspect - it counts intervals. Tested directly instead: with the cycle confirmed running, astro:before-swap was dispatched and the index then held for six seconds, nearly three intervals. No leaving frame survived, all five testimonials and portraits were visible again, the ready flag was cleared and the control was hidden.
  • A fourth pass fixed the cross-wipe, which had been half-built. Holding the outgoing portrait underneath is necessary but not sufficient: the clip was running on the img, while the frame AROUND that img is an opaque panel sitting on top of the outgoing frame, so the wipe revealed the new picture over its own blank card and the old picture was never visible at all. Caught by sampling pixels across the frame mid-wipe rather than by eye - the left 80 per cent read as the flat panel colour. The clip now runs on the whole incoming layer, so anything that has not arrived yet is simply unpainted.
  • Re-measured the same way afterwards, at 45 per cent through a wipe from the terracotta portrait to the slate one: the left of the frame reads rgb(160,73,42) - the OUTGOING picture, still there - and the right rgb(27,46,79), the incoming one, with 0 of 430 sampled pixels matching the flat panel against a left-hand majority before. The rounding and the shadow moved to the frames container so the wipe edge stays straight; clipping a rounded frame would round the moving edge and read as a card sliding in.
  • Nothing else moved: at rest the media column is still 430x573 at a 22px radius with the same two-layer shadow and one visible frame; the wipe still measures 1005ms at 0.084, 0.649 and 0.950; reduced motion still holds no second frame and no animation; and the no-script render still lays five portraits in the flow at five distinct offsets, each keeping its own radius and shadow, because the stacking is applied only under data-qt-ready.
  • A fifth pass exempted the first paint from the wipe, reported by the user: the opening portrait played the transition with nothing to transition from, which reads as a loading state rather than a hand-off. Verified over 231 animation frames across the first 1.5 seconds of a fresh load - the opening portrait never carries the play attribute, never has a clip-path and never has an animation name. An advance immediately afterwards still wipes normally, caught at 66.4 per cent with the outgoing frame held underneath. The quote still rises on that first paint and the figures still count, which is the testimonial arriving rather than one replacing another, and was left alone deliberately.
  • Chromium only. No WebKit or Gecko build was available in this session, and no claim is made about either.

Open the verification fixtureOpen the ClientRouter fixture

src/components/library/QuoteTestimonial.astro

This component is not one file on its own

  • assetsCopy these across too — they are referenced by URL, so nothing in the source above points at them: public/quote-testimonial/portrait-1.svg, public/quote-testimonial/portrait-2.svg, public/quote-testimonial/portrait-3.svg, public/quote-testimonial/portrait-4.svg, public/quote-testimonial/portrait-5.svg. Leave them behind and those URLs resolve to nothing on the other end. What each component does without them is in its README.
  • packagesInstall alongside it: npm i astro
---
/**
 * QuoteTestimonial — one testimonial at a time: a large serif quote that rises
 * into place a word at a time, an attribution, two supporting figures, and a
 * portrait that wipes in beside it.
 *
 * One self-contained file. No imports beyond an Astro type, no global
 * stylesheet, no npm packages, no webfonts and no network requests of its own:
 * the only things it loads are the portraits you pass in.
 *
 * The decisions that carry the weight, and why they are shaped this way:
 *
 *   - **Every testimonial is in the document.** The controller shows one and
 *     hides the rest; it never fetches, never rebuilds and never destroys
 *     content. Without script the section is simply a list of quotes, which is
 *     a perfectly good testimonial section and exactly what a crawler and a
 *     reader with no JavaScript should get.
 *
 *   - **The words are split at build time, and the motion is CSS.** Each word
 *     is wrapped in a masking span with its index on it, so the stagger is
 *     `calc(var(--qt-i) * 20ms)` rather than a timer per word. Nothing
 *     measures text at runtime, nothing writes a style per frame, and a quote
 *     of any length costs the same.
 *
 *   - **The mask is the effect.** A word rises from `translateY(100%)` inside
 *     a clipped box, so it appears from behind its own baseline rather than
 *     sliding over the line above. The 0.14em of padding on the mask is what
 *     stops descenders being shaved off — a `g` or a `y` is below the line box
 *     and would otherwise be clipped flat.
 *
 *   - **Reduced motion removes the motion, not the content.** The words are
 *     already in place, the portrait does not wipe, and changing testimonial
 *     is a swap. What it must never do is leave the quote at opacity 0, which
 *     is what a naive "turn off the animation" does to an effect whose resting
 *     state is invisible.
 *
 * Several instances can share a page: every query is scoped to the instance
 * root, ids are minted per instance, and all state lives in the controller's
 * closure.
 */
import type { ImageMetadata } from "astro";

export interface QuoteTestimonialStat {
	/** The figure itself, e.g. "65%". Set in the display serif. */
	value: string;
	/** What it measures, underneath and quieter. */
	label: string;
}

export interface QuoteTestimonialItem {
	/** The testimonial. Split into words for the reveal. */
	quote: string;
	/** Who said it. */
	name: string;
	/** Their role, company, or both. */
	role?: string;
	/** Portrait. Omitted, the frame renders as an empty tinted panel. */
	src?: string | ImageMetadata;
	/** Alternative text. Omitted or empty marks the portrait decorative. */
	alt?: string;
	/** Up to two supporting figures. More than two are ignored. */
	stats?: QuoteTestimonialStat[];
}

export interface QuoteTestimonialProps {
	/**
	 * The testimonials, in order. None, and the component renders nothing: it
	 * never supplies a testimonial, not even a placeholder one.
	 */
	items?: QuoteTestimonialItem[];
	/** Small label above the quote. */
	eyebrow?: string;
	/** Accessible name for the section. */
	label?: string;
	/** Accessible name for the two controls. */
	previousLabel?: string;
	nextLabel?: string;
	/** Whether the last testimonial wraps round to the first. */
	loop?: boolean;
	/** Advance on its own. Suppressed entirely under reduced motion. */
	autoplay?: boolean;
	/**
	 * Milliseconds each testimonial holds before the next one starts, measured
	 * start to start. Clamped to 1200–20000; the reference runs at 2200.
	 */
	interval?: number;
	/** Render the play/pause control. Only shown when autoplay can run. */
	showPauseControl?: boolean;
	/** Accessible name for that control. It does not change when pressed. */
	pauseLabel?: string;
	/** Optional extra class for project-specific layout. */
	class?: string;
	/** Element id. Also seeds the internal ids instead of a random value. */
	id?: string;
}

interface Props extends QuoteTestimonialProps {}

const {
	items = [],
	eyebrow = "In their words",
	label = "Testimonials",
	previousLabel = "Previous testimonial",
	nextLabel = "Next testimonial",
	loop = true,
	autoplay = true,
	interval = 2200,
	showPauseControl = true,
	pauseLabel = "Pause the testimonials",
	class: className,
	id,
}: Props = Astro.props;

/*
 * Normalised rather than trusted: the interval is multiplied by nothing and
 * handed to a timer, so a NaN would schedule immediately and a tiny value
 * would cycle faster than anyone can read.
 */
const safeInterval = Number.isFinite(Number(interval))
	? Math.min(20000, Math.max(1200, Number(interval)))
	: 2200;

/** Control characters are stripped first: "java\tscript:" is a scheme too. */
function stripControls(value: string): string {
	return [...value]
		.filter((character) => {
			const code = character.codePointAt(0) ?? 0;
			return code > 31 && code !== 127;
		})
		.join("");
}

/**
 * Portraits are treated as untrusted: they usually arrive from a CMS or a
 * content collection and become an attribute on every render. Only the schemes
 * that can execute are refused — `data:` is allowed, because an inline SVG is
 * a legitimate image.
 */
function safeSrc(value: unknown): string | undefined {
	if (typeof value !== "string") return undefined;
	const bare = stripControls(value.trim()).trim();
	if (bare === "") return undefined;
	if (/^(javascript|vbscript):/i.test(bare)) return undefined;
	return bare;
}

function mediaOf(item: QuoteTestimonialItem) {
	const metadata = item.src && typeof item.src === "object" ? (item.src as ImageMetadata) : undefined;
	const src = safeSrc(metadata ? metadata.src : item.src);
	if (!src) return undefined;
	return {
		src,
		width: Number.isFinite(metadata?.width) ? metadata!.width : undefined,
		height: Number.isFinite(metadata?.height) ? metadata!.height : undefined,
	};
}

const text = (value: unknown) => (typeof value === "string" ? value : "");

/*
 * A figure, split into the part that counts and the parts that do not.
 *
 * "2.8x" counts to 2.8 and keeps its x; "£0" keeps its symbol in front; "6
 * weeks" keeps the word after it. Anything with no number in it at all — "N/A",
 * "most of them" — comes back null and is simply rendered, because counting up
 * to a word is not a thing.
 *
 * The decimals are taken from what was written rather than guessed: "2.8" ticks
 * through one decimal place and "42" through none, so a figure never shows more
 * precision on the way than it does when it lands.
 */
const FIGURE = /^([^0-9]*)([0-9][0-9,]*(?:\.[0-9]+)?)(.*)$/s;

function countable(value: string) {
	const match = FIGURE.exec(value.trim());
	if (!match) return null;
	const [, prefix, digits, suffix] = match;
	const plain = digits.replace(/,/g, "");
	const target = Number(plain);
	if (!Number.isFinite(target)) return null;
	const dot = plain.indexOf(".");
	return {
		prefix,
		suffix,
		target,
		decimals: dot === -1 ? 0 : plain.length - dot - 1,
		grouped: digits.includes(","),
	};
}

/*
 * The quote is split here rather than in the browser.
 *
 * Splitting at runtime would mean reading text out of the DOM and writing
 * markup back into it on every change — work that scales with the length of
 * the quote, runs before the first paint the reader sees, and has to be undone
 * on teardown. Done at build time it is markup like any other: the stagger is
 * an index in a custom property and the browser does the rest.
 *
 * Split on whitespace, not on characters. A per-letter reveal at this size
 * reads as a slot machine rather than as speech.
 */
function words(quote: string): string[] {
	return quote.split(/\s+/).filter((word) => word !== "");
}

const list = (Array.isArray(items) ? items : []).filter(
	(item) => item && typeof item.quote === "string" && item.quote.trim() !== "",
);
const resolved = list.map((item) => ({
	words: words(text(item.quote)),
	name: text(item.name),
	role: text(item.role),
	media: mediaOf(item),
	alt: text(item.alt),
	/* Two is what the layout is built for; a third would either wrap or squeeze
	   the other two, and silently dropping it is kinder than either. */
	stats: (Array.isArray(item.stats) ? item.stats : [])
		.filter((stat) => stat && text(stat.value) !== "")
		.slice(0, 2)
		.map((stat) => ({
			value: text(stat.value),
			label: text(stat.label),
			count: countable(text(stat.value)),
		})),
}));

/*
 * Random rather than sequential: a module-level counter is shared by every
 * render in the same server process, which is fine for one page and wrong the
 * moment two pages are built in parallel and compared.
 */
const uid = id ?? `qt-${Math.random().toString(36).slice(2, 9)}`;
const statusId = `${uid}-status`;
const total = resolved.length;
const pad = (n: number) => String(n).padStart(2, "0");
---

{/* Nobody to quote, nothing to render — not even the eyebrow. */}
{total > 0 && (
<section
	class:list={["quote-testimonial", className]}
	id={id}
	data-quote-testimonial
	data-qt-loop={loop ? "1" : "0"}
	data-qt-autoplay={autoplay ? "1" : "0"}
	data-qt-interval={String(safeInterval)}
	aria-label={label}
>
	<div class="qt-stage">
		<div class="qt-text">
			<p class="qt-eyebrow">
				<span class="qt-rule" aria-hidden="true"></span>
				<span>{eyebrow}</span>
			</p>

			{/*
			    Every testimonial, in the document, always. The controller hides
			    the ones it is not showing; with no controller they are a list of
			    quotes, which is what this section is underneath the interaction.
			*/}
			<div class="qt-slides" data-qt-slides>
				{resolved.map((item, index) => (
					<figure class="qt-slide" data-qt-slide data-qt-index={String(index)}>
						<blockquote class="qt-quote">
							{item.words.map((word, wordIndex) => (
								<>
									<span class="qt-word" style={`--qt-i: ${wordIndex};`}>
										<span class="qt-word-in">{word}</span>
									</span>{" "}
								</>
							))}
						</blockquote>

						<figcaption class="qt-who">
							<span class="qt-name">{item.name}</span>
							{item.role !== "" && <span class="qt-role">{item.role}</span>}
						</figcaption>

						{item.stats.length > 0 && (
							<dl class="qt-stats">
								{item.stats.map((stat) => (
									<div class="qt-stat">
										{/*
										    `dt` is the label and `dd` the figure, which is the
										    order a definition list means and the reverse of the
										    order they are read on screen. `column-reverse` moves
										    the figure above its label without moving either of
										    them in the document.
										*/}
										<dt class="qt-stat-label">{stat.label}</dt>
										<dd
											class="qt-stat-value"
											data-qt-count={stat.count ? "" : undefined}
											data-qt-target={stat.count ? String(stat.count.target) : undefined}
											data-qt-decimals={stat.count ? String(stat.count.decimals) : undefined}
											data-qt-prefix={stat.count ? stat.count.prefix : undefined}
											data-qt-suffix={stat.count ? stat.count.suffix : undefined}
											data-qt-grouped={stat.count?.grouped ? "" : undefined}
										>
											{stat.value}
										</dd>
									</div>
								))}
							</dl>
						)}
					</figure>
				))}
			</div>
		</div>

		<div class="qt-media">
			<div class="qt-frames" data-qt-frames>
				{resolved.map((item, index) => (
					<div class="qt-frame" data-qt-frame data-qt-index={String(index)}>
						{item.media ? (
							<img
								class="qt-portrait"
								src={item.media.src}
								alt={item.alt}
								width={item.media.width}
								height={item.media.height}
								draggable="false"
								decoding="async"
							/>
						) : (
							<span class="qt-portrait qt-portrait--empty" aria-hidden="true"></span>
						)}
					</div>
				))}
			</div>

			{/*
			    Hidden until the controller reveals them. Without script there is
			    nothing to page through — every testimonial is already on screen —
			    and a control that cannot work is worse than no control.
			*/}
			<div class="qt-controls" data-qt-controls hidden>
				<p class="qt-counter" aria-hidden="true">
					<span class="qt-now" data-qt-now>{pad(1)}</span>{" "}
					<span class="qt-of">/ {pad(total)}</span>
				</p>
				<span class="qt-track" aria-hidden="true"></span>
				<button class="qt-step" type="button" data-qt-prev aria-label={previousLabel}>
					<svg viewBox="0 0 10 10" width="12" height="12" aria-hidden="true">
						<path d="M6.6 1 2.2 5l4.4 4" />
					</svg>
				</button>
				<button class="qt-step" type="button" data-qt-next aria-label={nextLabel}>
					<svg viewBox="0 0 10 10" width="12" height="12" aria-hidden="true">
						<path d="M3.4 1 7.8 5l-4.4 4" />
					</svg>
				</button>
				{showPauseControl && (
					/*
					 * The reference cycles with no way to stop it. Content that
					 * moves on its own, indefinitely, needs one — so this is an
					 * addition rather than a match, and it hides itself when
					 * there is no drift to pause.
					 */
					<button class="qt-step" type="button" data-qt-pause hidden aria-pressed="false">
						<span class="qt-a11y">{pauseLabel}</span>
						<svg class="qt-glyph qt-glyph--pause" viewBox="0 0 10 10" width="12" height="12" aria-hidden="true">
							<path d="M3.5 1v8M6.5 1v8" />
						</svg>
						<svg class="qt-glyph qt-glyph--play" viewBox="0 0 10 10" width="12" height="12" aria-hidden="true">
							<path d="M2.6 1.2v7.6L8.4 5z" />
						</svg>
					</button>
				)}
			</div>
		</div>
	</div>

	{/*
	    What changed, for anybody not watching it change. The reference has no
	    equivalent: it swaps the quote silently, so a screen reader user pressing
	    "next" is told nothing at all.
	*/}
	<p class="qt-status" id={statusId} data-qt-status role="status" aria-live="polite"></p>
</section>
)}

<script>
	/**
	 * QuoteTestimonial controller.
	 *
	 * One closure per instance. Every query is scoped to that instance's root,
	 * every listener carries an AbortController signal, and the whole thing is
	 * torn down before a client-side navigation swaps the document.
	 *
	 * It owns which testimonial is showing and nothing else. The motion is CSS:
	 * the controller adds an attribute and the stylesheet decides what that
	 * looks like, so a project that wants different timing edits a custom
	 * property rather than this file.
	 */
	interface Instance {
		destroy(): void;
	}

	function initQuoteTestimonial(root: HTMLElement): Instance | undefined {
		/* Idempotent: booting twice is a no-op, not a second set of listeners. */
		if (root.dataset.qtReady === "") return undefined;

		const slides = Array.from(
			root.querySelectorAll<HTMLElement>("[data-qt-slide]"),
		);
		const frames = Array.from(
			root.querySelectorAll<HTMLElement>("[data-qt-frame]"),
		);
		const controls = root.querySelector<HTMLElement>("[data-qt-controls]");
		const previous = root.querySelector<HTMLButtonElement>("[data-qt-prev]");
		const next = root.querySelector<HTMLButtonElement>("[data-qt-next]");
		const now = root.querySelector<HTMLElement>("[data-qt-now]");
		const status = root.querySelector<HTMLElement>("[data-qt-status]");
		if (slides.length === 0) return undefined;

		root.dataset.qtReady = "";
		const controller = new AbortController();
		const { signal } = controller;

		const loop = root.dataset.qtLoop !== "0";
		const wantsAutoplay = root.dataset.qtAutoplay !== "0";
		const interval = Number(root.dataset.qtInterval) || 2200;
		const pause = root.querySelector<HTMLButtonElement>("[data-qt-pause]");
		const reduced = window.matchMedia("(prefers-reduced-motion: reduce)");
		const count = slides.length;
		let index = 0;

		const pad = (value: number) => String(value).padStart(2, "0");

		/* ---- the figures ------------------------------------------------ */

		/*
		 * How long a figure takes to count up, and the shape of the climb.
		 *
		 * Both measured off the reference frame by frame: the value leaves zero
		 * and lands on target 860ms later, having passed 0.36 of the way at a
		 * quarter of the run, 0.64 at half and 0.89 at three quarters. That is
		 * an ease-out of about the 1.5 power — between a straight line and a
		 * quadratic, so it slows into place without the long crawl a cubic
		 * would give it.
		 */
		const COUNT_DURATION = 860;
		const countEase = (t: number) => 1 - Math.pow(1 - t, 1.5);

		const figures = Array.from(root.querySelectorAll<HTMLElement>("[data-qt-count]"));
		/*
		 * What each figure said when it was served.
		 *
		 * The last frame restores this string rather than formatting one, so a
		 * figure always comes to rest on exactly what the author wrote —
		 * whatever the browser's locale would have done to a grouped number,
		 * and whatever rounding the tween was doing on the way.
		 */
		const asWritten = new Map<HTMLElement, string>();
		for (const figure of figures) asWritten.set(figure, figure.textContent ?? "");

		let countFrame: number | undefined;

		function stopCounting() {
			if (countFrame !== undefined) window.cancelAnimationFrame(countFrame);
			countFrame = undefined;
		}

		function write(figure: HTMLElement, value: number) {
			const decimals = Number(figure.dataset.qtDecimals ?? "0");
			const body =
				figure.dataset.qtGrouped !== undefined
					? value.toLocaleString(undefined, {
							minimumFractionDigits: decimals,
							maximumFractionDigits: decimals,
						})
					: value.toFixed(decimals);
			figure.textContent = `${figure.dataset.qtPrefix ?? ""}${body}${figure.dataset.qtSuffix ?? ""}`;
		}

		function settle(scope: HTMLElement) {
			for (const figure of scope.querySelectorAll<HTMLElement>("[data-qt-count]")) {
				figure.textContent = asWritten.get(figure) ?? figure.textContent;
			}
		}

		/** Count the figures on one testimonial up from zero. */
		function countUp(slide: HTMLElement) {
			stopCounting();
			const cells = Array.from(slide.querySelectorAll<HTMLElement>("[data-qt-count]"));
			if (cells.length === 0) return;
			/* Nothing to watch climb, so it is simply already there. */
			if (reduced.matches) {
				settle(slide);
				return;
			}

			const started = performance.now();
			const step = (now: number) => {
				const progress = Math.min(1, (now - started) / COUNT_DURATION);
				if (progress >= 1) {
					countFrame = undefined;
					settle(slide);
					return;
				}
				const eased = countEase(progress);
				for (const cell of cells) write(cell, Number(cell.dataset.qtTarget ?? "0") * eased);
				countFrame = window.requestAnimationFrame(step);
			};
			countFrame = window.requestAnimationFrame(step);
		}

		/**
		 * How long the portrait takes to wipe in, read from the stylesheet.
		 *
		 * The outgoing portrait has to be removed when the wipe finishes, and
		 * the wipe's length lives in a custom property so a project can retune
		 * it. Reading it back is what stops the two drifting apart the first
		 * time somebody changes one of them.
		 */
		function wipeMs(): number {
			const raw = getComputedStyle(root).getPropertyValue("--qt-wipe-duration").trim();
			const value = parseFloat(raw);
			if (!Number.isFinite(value)) return 1000;
			return raw.endsWith("ms") ? value : value * 1000;
		}

		let leaving: HTMLElement | null = null;
		let leaveTimer: number | undefined;
		/*
		 * The first paint is not a hand-off.
		 *
		 * A wipe is one portrait replacing another, and on the first render
		 * there is nothing to replace — so it plays as a picture assembling
		 * itself out of nothing, which reads as a loading state rather than a
		 * transition. The first portrait is simply there; every one after it
		 * arrives over the one before.
		 */
		let firstRender = true;

		function clearLeaving() {
			if (leaveTimer !== undefined) window.clearTimeout(leaveTimer);
			leaveTimer = undefined;
			if (!leaving) return;
			leaving.hidden = true;
			delete leaving.dataset.qtLeaving;
			leaving.removeAttribute("aria-hidden");
			leaving = null;
		}

		/**
		 * Swap the portrait, keeping the old one underneath while it happens.
		 *
		 * The incoming portrait is revealed by a clip that runs across it, and
		 * it has to be revealed over SOMETHING. Hiding the outgoing one first
		 * reveals it over an empty panel, which reads as a cut followed by a
		 * wipe rather than as one picture replacing another.
		 */
		function swapFrames(next: number, previous: number) {
			clearLeaving();
			frames.forEach((frame, position) => {
				frame.hidden = position !== next;
			});

			const outgoing = frames[previous];
			if (!outgoing || previous === next || reduced.matches) return;

			outgoing.hidden = false;
			outgoing.dataset.qtLeaving = "";
			/* Two portraits are on screen but only one is the testimonial's. */
			outgoing.setAttribute("aria-hidden", "true");
			leaving = outgoing;
			leaveTimer = window.setTimeout(clearLeaving, wipeMs());
		}

		/**
		 * Show one testimonial and hide the rest.
		 *
		 * `hidden` rather than a class: it takes the element out of the
		 * accessibility tree and the tab order in one attribute, with no
		 * stylesheet needed to agree with it. The quote carries no focusable
		 * content today, but a project that puts a link in one gets the right
		 * behaviour without this file changing.
		 */
		function expose(elements: HTMLElement[], shown: number) {
			elements.forEach((element, position) => {
				element.hidden = position !== shown;
			});
		}

		/**
		 * Restart the word reveal.
		 *
		 * The animation is declared in CSS against `data-qt-play`, so replaying
		 * it means removing the attribute, forcing the browser to notice, and
		 * putting it back. Reading `offsetWidth` is the part that does the
		 * forcing: without it the two writes are coalesced into no change at
		 * all and the words simply stay where they are.
		 */
		function play(slide: HTMLElement) {
			if (reduced.matches) return;
			delete slide.dataset.qtPlay;
			void slide.offsetWidth;
			slide.dataset.qtPlay = "";
		}

		/* `target`, not `next`: the control is called `next`, and a parameter of
		   that name would shadow it for the whole body. */
		function show(target: number, announce: boolean) {
			const from = index;
			index = ((target % count) + count) % count;

			expose(slides, index);
			swapFrames(index, from);
			play(slides[index]);
			if (frames[index] && !firstRender) play(frames[index]);
			countUp(slides[index]);

			if (now) now.textContent = pad(index + 1);
			updateEnds();

			/*
			 * Announced, but only for an interaction. Announcing the first
			 * testimonial at boot would make every page load speak a quote
			 * nobody asked to hear.
			 */
			if (announce && status) {
				const name = slides[index].querySelector<HTMLElement>(".qt-name")?.textContent ?? "";
				status.textContent = `Testimonial ${index + 1} of ${count}${name ? `, ${name}` : ""}`;
			}
		}

		/** With looping off, the ends are dead and say so rather than just failing. */
		function updateEnds() {
			if (loop) return;
			if (previous) previous.disabled = index === 0;
			if (next) next.disabled = index === count - 1;
		}

		/* ---- autoplay ---------------------------------------------------- */

		let autoTimer: number | undefined;
		let hovering = false;
		let focused = false;
		let manuallyPaused = false;

		function autoAllowed(): boolean {
			if (!wantsAutoplay || reduced.matches) return false;
			if (manuallyPaused || document.hidden) return false;
			if (hovering || focused) return false;
			return count > 1;
		}

		function stopAuto() {
			if (autoTimer !== undefined) window.clearTimeout(autoTimer);
			autoTimer = undefined;
		}

		function scheduleAuto() {
			stopAuto();
			if (!autoAllowed()) return;
			autoTimer = window.setTimeout(() => {
				autoTimer = undefined;
				/*
				 * Silent. Announcing an advance nobody asked for, every couple
				 * of seconds, would make the live region unusable — the pause
				 * control and the pause-on-focus are what serve that reader.
				 */
				show(index + 1, false);
				scheduleAuto();
			}, interval);
		}

		function syncPause() {
			if (!pause) return;
			const usable = wantsAutoplay && !reduced.matches && count > 1;
			pause.hidden = !usable;
			pause.setAttribute("aria-pressed", manuallyPaused ? "true" : "false");
		}

		pause?.addEventListener("click", () => {
			manuallyPaused = !manuallyPaused;
			syncPause();
			scheduleAuto();
		}, { signal });

		/* Hover is a mouse affordance; a touch tap must not stop it for good. */
		root.addEventListener("pointerenter", (event) => {
			if (event.pointerType === "touch") return;
			hovering = true;
			scheduleAuto();
		}, { signal });

		root.addEventListener("pointerleave", (event) => {
			if (event.pointerType === "touch") return;
			hovering = false;
			scheduleAuto();
		}, { signal });

		root.addEventListener("focusin", () => {
			focused = true;
			scheduleAuto();
		}, { signal });

		root.addEventListener("focusout", (event) => {
			if (root.contains(event.relatedTarget as Node | null)) return;
			focused = false;
			scheduleAuto();
		}, { signal });

		document.addEventListener("visibilitychange", scheduleAuto, { signal });

		function step(delta: number) {
			if (!loop) {
				const target = index + delta;
				if (target < 0 || target > count - 1) return;
			}
			show(index + delta, true);
			scheduleAuto();
		}

		previous?.addEventListener("click", () => step(-1), { signal });
		next?.addEventListener("click", () => step(1), { signal });

		/*
		 * Arrow keys, while focus is inside the section.
		 *
		 * The reference offers the two buttons and nothing else. Once a reader
		 * is in the controls, left and right are what they will try, and it
		 * costs one listener to be right about that.
		 */
		root.addEventListener(
			"keydown",
			(event) => {
				if (event.altKey || event.ctrlKey || event.metaKey) return;
				if (event.key === "ArrowLeft") {
					event.preventDefault();
					step(-1);
				} else if (event.key === "ArrowRight") {
					event.preventDefault();
					step(1);
				}
			},
			{ signal },
		);

		/* A change of preference mid-session is honoured: the resting state is
		   the same either way, so there is nothing to undo. */
		reduced.addEventListener("change", () => {
			if (reduced.matches) {
				for (const slide of slides) delete slide.dataset.qtPlay;
				for (const frame of frames) delete frame.dataset.qtPlay;
				stopCounting();
				settle(root);
				clearLeaving();
			}
			syncPause();
			scheduleAuto();
		}, { signal });

		/* Revealed only now that there is something behind them. */
		if (controls) controls.hidden = false;

		syncPause();
		show(0, false);
		firstRender = false;
		scheduleAuto();

		function destroy() {
			/* Back to exactly the state the markup was served in, so a re-used
			   element cannot inherit a position from the previous route. */
			delete root.dataset.qtReady;
			stopCounting();
			stopAuto();
			clearLeaving();
			settle(root);
			for (const slide of slides) {
				slide.hidden = false;
				delete slide.dataset.qtPlay;
			}
			for (const frame of frames) {
				frame.hidden = false;
				delete frame.dataset.qtPlay;
			}
			if (controls) controls.hidden = true;
			if (pause) {
				pause.hidden = true;
				pause.setAttribute("aria-pressed", "false");
			}
			if (previous) previous.disabled = false;
			if (next) next.disabled = false;
			manuallyPaused = false;
			hovering = false;
			focused = false;
			if (status) status.textContent = "";
			index = 0;
			controller.abort();
		}

		/*
		 * Astro replaces the document on a client-side navigation. Detach every
		 * listener, return the section to its served state, and clear the ready
		 * flag so a re-used element can boot again.
		 */
		document.addEventListener("astro:before-swap", destroy, { once: true, signal });

		return { destroy };
	}

	const boot = () =>
		document
			.querySelectorAll<HTMLElement>("[data-quote-testimonial]")
			.forEach(initQuoteTestimonial);

	/* Astro's own <script> is a deferred module, so the DOM is already parsed
	   by the time this runs. The readyState check is for the case where this
	   file is copied into a project that inlines it some other way. */
	if (document.readyState === "loading") {
		document.addEventListener("DOMContentLoaded", boot, { once: true });
	} else {
		boot();
	}

	/* Fires on every view transition in a project using <ClientRouter />, and
	   never at all in one that does not. Registered once per module, so it
	   cannot accumulate. */
	document.addEventListener("astro:page-load", boot);
</script>

<style>
	.quote-testimonial {
		/* ---- overridable tokens -------------------------------------------
		   Set any of these on the element, from a class, an id or a wrapper
		   rule, to retune the component without touching this file. */
		--qt-ground: #f7f7f5;
		--qt-ink: #101114;
		--qt-muted: #6e6e68;
		/* The eyebrow, the rule beside it and the figures all share one accent,
		   which is most of why the section reads as a single object. */
		--qt-accent: #14352a;
		--qt-line: #e2e1dc;

		--qt-max: 75rem; /* 1200px */
		--qt-pad: clamp(1.5rem, 4.4cqi, 4rem); /* 64px at the full width */
		--qt-gap: clamp(2rem, 6cqi, 4.5rem); /* 72px */
		--qt-text-col: 35.625rem; /* 570px */
		--qt-media-col: 26.875rem; /* 430px */
		/* Where the two columns stop fitting side by side. The reference puts
		   this at 940px and so does this. */
		--qt-stack-at: 58.75rem;

		--qt-quote-size: clamp(1.75rem, 3.6cqi, 2.625rem); /* 30px → 42px */
		--qt-radius: 1.375rem; /* 22px */
		--qt-shadow:
			0 30px 60px -28px rgb(16 17 20 / 0.34),
			0 2px 6px rgb(16 17 20 / 0.06);

		/* ---- motion, all measured off the reference -----------------------
		   A word rises from a full line below itself over 680ms on an
		   exponential ease-out, each one 20ms behind the last. */
		--qt-word-duration: 680ms;
		--qt-word-stagger: 20ms;
		--qt-ease: cubic-bezier(0.16, 1, 0.3, 1);
		/*
		 * The portrait wipe, measured off the reference frame by frame: a full
		 * second, 7% of the way at a quarter of the run, 65% at half and 96% at
		 * three quarters. That is a deep S — almost still at both ends and very
		 * quick through the middle — which is why it reads as a sweep rather
		 * than a fade. An earlier pass had this at 220ms on an ease-out, from
		 * sampling only the tail of the curve, and it snapped.
		 */
		--qt-wipe-duration: 1000ms;
		--qt-wipe-ease: cubic-bezier(0.62, 0, 0.25, 1);

		box-sizing: border-box;
		container-type: inline-size;
		display: block;
		background: var(--qt-ground);
		color: var(--qt-ink);
		font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
	}

	/* `:where` keeps specificity at zero, so a destination project's own rules
	   still win where it means them to. */
	.quote-testimonial :where(*, *::before, *::after) {
		box-sizing: border-box;
	}

	.qt-stage {
		display: grid;
		grid-template-columns: minmax(0, var(--qt-text-col)) var(--qt-media-col);
		align-items: center;
		gap: var(--qt-gap);
		max-width: var(--qt-max);
		margin-inline: auto;
		padding: var(--qt-pad);
	}

	/*
	 * One column below the breakpoint, portrait first.
	 *
	 * Stacked, the portrait leads: it is the face attached to the words, and a
	 * phone screen that opens on 42px of serif with no idea who is speaking is
	 * a worse read than one that opens on the person.
	 */
	@container (max-width: 58.75rem) {
		.qt-stage {
			grid-template-columns: minmax(0, 1fr);
		}

		.qt-media {
			order: -1;
		}
	}

	/* ---- the text column ------------------------------------------------ */

	.qt-eyebrow {
		display: flex;
		align-items: center;
		gap: 0.75rem;
		margin: 0;
		color: var(--qt-accent);
		font-size: 0.656rem; /* 10.5px */
		line-height: 1.4;
		letter-spacing: 0.2em;
	}

	.qt-rule {
		flex: none;
		width: 1.625rem; /* 26px */
		height: 1px;
		background: currentColor;
	}

	.qt-slide {
		margin: 0;
	}

	.qt-slide[hidden] {
		display: none;
	}

	.qt-quote {
		margin: 1.5rem 0 0;
		color: var(--qt-ink);
		font-family: Georgia, "Times New Roman", serif;
		font-size: var(--qt-quote-size);
		line-height: 1.24;
		letter-spacing: -0.008em;
		text-wrap: pretty;
	}

	/*
	 * The mask. `overflow: hidden` is what makes a word appear from behind its
	 * own line rather than sliding in over the one above.
	 *
	 * The padding and the equal negative margin are not decoration: a line box
	 * ends at the baseline plus the descender, and clipping at the line box
	 * shaves the tail off every g, j, p, q and y. The padding grows the clip,
	 * the margin takes the space back, and the line spacing is unchanged.
	 */
	.qt-word {
		display: inline-block;
		overflow: hidden;
		vertical-align: top;
		padding-bottom: 0.14em;
		margin-bottom: -0.14em;
	}

	.qt-word-in {
		display: inline-block;
		will-change: transform;
	}

	/*
	 * Hidden only once a controller exists to reveal it. Served like this
	 * unconditionally, a reader with no JavaScript would get a section of
	 * invisible quotes — the single worst way this component could fail.
	 */
	/*
	 * A full line PLUS the mask's own padding.
	 *
	 * `100%` alone resolves against the word's line box, which leaves it
	 * starting 0.14em short of the bottom of the clip — the top of a tall
	 * letter is already showing on the first frame. Measured against the
	 * reference: 58.3px of travel on a 52.08px line, which is exactly a line
	 * plus the padding.
	 */
	.quote-testimonial[data-qt-ready] .qt-word-in {
		opacity: 0;
		transform: translateY(calc(100% + 0.14em));
	}

	.quote-testimonial[data-qt-ready] .qt-slide[data-qt-play] .qt-word-in {
		animation: qt-rise var(--qt-word-duration) var(--qt-ease)
			calc(var(--qt-i) * var(--qt-word-stagger)) both;
	}

	@keyframes qt-rise {
		from {
			opacity: 0;
			transform: translateY(calc(100% + 0.14em));
		}
		to {
			opacity: 1;
			transform: translateY(0);
		}
	}

	.qt-who {
		display: flex;
		flex-direction: column;
		gap: 0.375rem;
		margin-top: 2rem;
	}

	.qt-name {
		color: var(--qt-ink);
		font-size: 0.75rem;
		line-height: 1.3;
		letter-spacing: 0.14em;
	}

	.qt-role {
		color: var(--qt-muted);
		font-size: 0.8125rem;
		line-height: 1.4;
	}

	.qt-stats {
		display: flex;
		align-items: stretch;
		gap: 1.75rem;
		margin: 2.375rem 0 0;
	}

	.qt-stat {
		display: flex;
		/* The figure reads above its label; the document says label then figure,
		   which is what a definition list means. */
		flex-direction: column-reverse;
		gap: 0.375rem;
		min-width: 0;
	}

	/* A hairline between the two, and only between them. */
	.qt-stat + .qt-stat {
		padding-left: 1.75rem;
		border-left: 1px solid var(--qt-line);
	}

	.qt-stat-value {
		margin: 0;
		color: var(--qt-accent);
		font-family: Georgia, "Times New Roman", serif;
		font-size: clamp(1.75rem, 3.4cqi, 2.5rem);
		line-height: 1;
		letter-spacing: -0.01em;
	}

	.qt-stat-label {
		color: var(--qt-muted);
		font-size: 0.75rem;
		line-height: 1.45;
		text-wrap: pretty;
	}

	/* ---- the portrait --------------------------------------------------- */

	/*
	 * Stacked, but only with a controller running. Served like this they would
	 * all pile onto one another; in the no-script render each portrait sits in
	 * the flow under its own quote, which is the point of that render.
	 */
	.quote-testimonial[data-qt-ready] .qt-frames {
		position: relative;
		aspect-ratio: 3 / 4;
		/*
		 * The rounding and the shadow move out here once the frames are
		 * stacked, so each frame inside is a plain rectangle. The wipe then
		 * has a straight leading edge — clipping a rounded frame would round
		 * the moving edge too, and the new picture would appear to slide in as
		 * a card rather than sweep across.
		 */
		overflow: hidden;
		border-radius: var(--qt-radius);
		box-shadow: var(--qt-shadow);
	}

	.quote-testimonial[data-qt-ready] .qt-frame {
		position: absolute;
		inset: 0;
		aspect-ratio: auto;
		border-radius: 0;
		box-shadow: none;
		z-index: 1;
	}

	/* The outgoing portrait, held underneath for the length of the wipe. */
	.quote-testimonial[data-qt-ready] .qt-frame[data-qt-leaving] {
		z-index: 0;
	}

	.qt-frame {
		position: relative;
		aspect-ratio: 3 / 4;
		overflow: hidden;
		border-radius: var(--qt-radius);
		background: var(--qt-line);
		box-shadow: var(--qt-shadow);
	}

	.qt-frame[hidden] {
		display: none;
	}

	.qt-portrait {
		display: block;
		width: 100%;
		height: 100%;
		object-fit: cover;
		/* Slightly above centre: on a portrait crop, dead centre puts the chin
		   in the middle of the frame and the top of the head against the edge. */
		object-position: 50% 42%;
	}

	.qt-portrait--empty {
		background: var(--qt-line);
	}

	/*
	 * The wipe runs on the FRAME, not on the picture inside it.
	 *
	 * Clipping only the picture leaves the frame's own panel — opaque, and on
	 * top of the outgoing frame — covering the very thing the wipe is supposed
	 * to reveal it over. The result was a new picture arriving over a blank
	 * card instead of over the previous one. Clipping the whole layer means
	 * everything that has not arrived yet is simply not painted, and the
	 * portrait underneath shows through until it does.
	 */
	.quote-testimonial[data-qt-ready] .qt-frame[data-qt-play] {
		animation: qt-wipe var(--qt-wipe-duration) var(--qt-wipe-ease) both;
	}

	@keyframes qt-wipe {
		from {
			clip-path: inset(0 0 0 100%);
		}
		to {
			clip-path: inset(0 0 0 0);
		}
	}

	/* ---- the controls --------------------------------------------------- */

	.qt-controls {
		display: flex;
		align-items: center;
		gap: 1.25rem;
		margin-top: 1.4375rem;
	}

	.qt-controls[hidden] {
		display: none;
	}

	.qt-counter {
		flex: none;
		margin: 0;
		color: var(--qt-muted);
		font-size: 0.75rem;
		line-height: 1.4;
		letter-spacing: 0.1em;
	}

	.qt-now {
		color: var(--qt-ink);
		font-weight: 600;
	}

	/* Takes the space the counter and the buttons do not. */
	.qt-track {
		flex: 1;
		height: 1px;
		background: var(--qt-line);
	}

	.qt-step {
		display: inline-flex;
		align-items: center;
		justify-content: center;
		flex: none;
		width: 2.5rem;
		height: 2.5rem;
		padding: 0;
		border: 1px solid var(--qt-line);
		border-radius: 50%;
		background: none;
		color: var(--qt-ink);
		cursor: pointer;
		-webkit-tap-highlight-color: transparent;
	}

	.qt-step svg {
		fill: none;
		stroke: currentColor;
		stroke-width: 1.4;
		stroke-linecap: round;
		stroke-linejoin: round;
	}

	.qt-step:hover {
		border-color: var(--qt-ink);
	}

	.qt-step:focus-visible {
		outline: 2px solid var(--qt-accent);
		outline-offset: 2px;
	}

	.qt-step:disabled {
		opacity: 0.4;
		cursor: default;
	}

	.qt-step:disabled:hover {
		border-color: var(--qt-line);
	}

	.qt-glyph {
		fill: none;
		stroke: currentColor;
		stroke-width: 1.4;
		stroke-linecap: round;
		stroke-linejoin: round;
	}

	.qt-glyph--play {
		fill: currentColor;
		stroke: none;
	}

	/* Pressed means "the cycle is paused", so the control offers play. */
	.qt-step[aria-pressed="false"] .qt-glyph--play,
	.qt-step[aria-pressed="true"] .qt-glyph--pause {
		display: none;
	}

	.qt-step[hidden] {
		display: none;
	}

	/* Announced, never shown. */
	.qt-a11y,
	.qt-status {
		position: absolute;
		width: 1px;
		height: 1px;
		margin: -1px;
		padding: 0;
		overflow: hidden;
		clip-path: inset(50%);
		white-space: nowrap;
	}

	/* ---- reduced motion --------------------------------------------------
	   The words are already where they belong and the portrait does not wipe.
	   The important half of this is the first rule: the resting state of the
	   reveal is invisible, so switching the animation off without also
	   restoring opacity would hide the quote from exactly the readers who
	   asked for less movement. */
	@media (prefers-reduced-motion: reduce) {
		.quote-testimonial[data-qt-ready] .qt-word-in {
			opacity: 1;
			transform: none;
			will-change: auto;
		}

		.quote-testimonial[data-qt-ready] .qt-slide[data-qt-play] .qt-word-in,
		.quote-testimonial[data-qt-ready] .qt-frame[data-qt-play] {
			animation: none;
		}
	}
</style>