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	<!DOCTYPE html>
	<html lang="ru">
	<head>
	<meta charset="UTF-8">
	<title>Mouse Humanize Visualizer</title>
	<style>
	* { box-sizing: border-box; margin: 0; padding: 0; }
	:root {
	--bg: #0f111a;
	--panel: rgba(22, 27, 34, 0.92);
	--border: #30363d;
	--text: #e6edf3;
	--muted: #8b949e;
	--blue: #58a6ff;
	--red: #f85149;
	--green: #3fb950;
	--yellow: #d29922;
	}
	body {
	background: var(--bg);
	color: var(--text);
	font-family: 'SFMono-Regular', Consolas, monospace;
	overflow: hidden;
	width: 100vw;
	height: 100vh;
	position: relative;
	font-size: 13px;
	}
	#canvas {
	position: absolute;
	top: 0;
	left: 0;
	z-index: 1;
	pointer-events: none;
	}
	.panel {
	position: absolute;
	background: var(--panel);
	border: 1px solid var(--border);
	border-radius: 6px;
	padding: 10px 12px;
	z-index: 10;
	backdrop-filter: blur(2px);
	}
	.panel h3 {
	font-size: 11px;
	text-transform: uppercase;
	letter-spacing: 0.04em;
	color: var(--muted);
	margin-bottom: 6px;
	font-weight: normal;
	}
	/* ---- stats (top-left) ---- */
	#stats {
	top: 14px;
	left: 14px;
	width: 260px;
	line-height: 1.55;
	}
	.panel .row { display: flex; justify-content: space-between; gap: 8px; }
	.panel .row span:last-child { color: var(--blue); font-weight: bold; }
	.panel .sep { border-top: 1px solid var(--border); margin: 6px 0; }

	/* ---- keyboard humanize panel (top-center) ---- */
	#keyboard-panel {
	top: 14px;
	left: 50%;
	transform: translateX(-50%);
	width: 380px;
	}
	#keyboard-panel .row { margin-bottom: 2px; }
	#keyboard-panel .typing-row { display: flex; gap: 6px; margin-bottom: 8px; }
	#typing-input {
	flex: 1;
	background: #0d1117;
	border: 1px solid var(--border);
	border-radius: 4px;
	color: var(--text);
	padding: 6px 8px;
	font-family: inherit;
	font-size: 13px;
	}
	#typing-input:focus { outline: 1px solid var(--blue); }
	#btn-kb-clear {
	background: #21262d;
	border: 1px solid var(--border);
	color: var(--muted);
	border-radius: 4px;
	cursor: pointer;
	padding: 0 12px;
	font-family: inherit;
	}
	#btn-kb-clear:hover { background: #30363d; }

	/* ---- controls (top-right) ---- */
	#controls {
	top: 14px;
	right: 14px;
	width: 210px;
	}
	#controls button {
	width: 100%;
	margin-bottom: 6px;
	padding: 6px 8px;
	background: #21262d;
	color: var(--text);
	border: 1px solid var(--border);
	border-radius: 4px;
	cursor: pointer;
	font-family: inherit;
	font-size: 12px;
	}
	#controls button:hover { background: #30363d; }
	#controls label {
	display: flex;
	align-items: center;
	gap: 6px;
	margin-bottom: 4px;
	color: var(--muted);
	font-size: 12px;
	cursor: pointer;
	}

	/* ---- graphs (bottom-left) ---- */
	#graph-container {
	bottom: 14px;
	left: 14px;
	width: 480px;
	}
	.graph-label {
	font-size: 11px;
	color: var(--muted);
	margin: 6px 0 3px;
	display: flex;
	justify-content: space-between;
	}
	canvas.graph { display: block; width: 100%; border-bottom: 1px solid #21262d; }

	/* ---- history (bottom-right) ---- */
	#history-panel {
	bottom: 14px;
	right: 14px;
	width: 320px;
	max-height: 300px;
	display: flex;
	flex-direction: column;
	}
	#history-list {
	overflow-y: auto;
	flex: 1;
	margin-top: 4px;
	}
	.run-entry {
	padding: 5px 6px;
	border-radius: 4px;
	border: 1px solid transparent;
	cursor: pointer;
	font-size: 11px;
	color: var(--muted);
	line-height: 1.4;
	}
	.run-entry:hover { background: #1c2128; }
	.run-entry.selected { border-color: var(--blue); background: #17253a; color: var(--text); }
	.run-entry b { color: var(--text); }

	/* ---- targets ---- */
	.targets-container {
	position: absolute;
	width: 100%;
	height: 100%;
	z-index: 2;
	}
	.target-btn {
	position: absolute;
	padding: 22px 32px;
	background: #1f242c;
	border: 2px dashed var(--blue);
	border-radius: 8px;
	color: var(--blue);
	font-weight: bold;
	font-family: inherit;
	cursor: pointer;
	user-select: none;
	}
	.target-btn::after {
	content: '';
	position: absolute;
	top: 50%;
	left: 50%;
	width: 6px;
	height: 6px;
	background: var(--red);
	border-radius: 50%;
	transform: translate(-50%, -50%);
	}
	.heatmap {
	position: absolute;
	top: -46px;
	left: 50%;
	transform: translateX(-50%);
	width: 44px;
	height: 44px;
	background: rgba(13, 17, 23, 0.9);
	border: 1px solid var(--border);
	border-radius: 4px;
	pointer-events: none;
	}
	</style>
	</head>
	<body>

	<canvas id="canvas"></canvas>

	<div class="panel" id="stats">
	<h3>Текущий run</h3>
	<div class="row"><span>Точек</span><span id="s-pts">0</span></div>
	<div class="row"><span>Длительность</span><span id="s-dur">0 ms</span></div>
	<div class="row"><span>Путь / прямая</span><span id="s-path">0 / 0 px</span></div>
	<div class="row"><span>Линейность</span><span id="s-eff">—</span></div>
	<div class="row"><span>Avg / Max V</span><span id="s-v">0 / 0 px/ms</span></div>
	<div class="row"><span>Джиттер dt (σ)</span><span id="s-jitter">—</span></div>
	<div class="sep"></div>
	<div class="row"><span>Max V (всего)</span><span id="s-maxv-all">0</span></div>
	<div class="row"><span>Клик Δ</span><span id="s-click">—</span></div>
	</div>

	<div class="panel" id="controls">
	<h3>Управление</h3>
	<button id="btn-clear">Очистить всё</button>
	<button id="btn-fade-toggle">Затухание следа: выкл</button>
	<button id="btn-shuffle">Перемешать мишени</button>
	<button id="btn-export">Экспорт JSON</button>
	<label><input type="checkbox" id="chk-markers" checked> Точки дискретизации</label>
	<label><input type="checkbox" id="chk-ref" checked> Опорная прямая (start→end)</label>
	</div>

	<div class="panel" id="keyboard-panel">
	<h3>Клавиатура (humanize)</h3>
	<div class="typing-row">
	<input type="text" id="typing-input" placeholder="Печатайте здесь / фокус для инъекции...">
	<button id="btn-kb-clear" title="Очистить">✕</button>
	</div>
	<div class="row"><span>Символов</span><span id="kb-count">0</span></div>
	<div class="row"><span>Длительность</span><span id="kb-dur">0 ms</span></div>
	<div class="row"><span>Скорость</span><span id="kb-speed">0 CPM</span></div>
	<div class="row"><span>Flight avg / σ</span><span id="kb-flight">— / —</span></div>
	<div class="row"><span>Dwell avg / σ</span><span id="kb-dwell">— / —</span></div>
	<div class="graph-label"><span>Flight time (пауза перед клавишей), мс</span></div>
	<canvas class="graph" id="flightGraph" width="360" height="55"></canvas>
	<div class="graph-label"><span>Dwell time (удержание клавиши), мс</span></div>
	<canvas class="graph" id="dwellGraph" width="360" height="55"></canvas>
	</div>

	<div class="targets-container" id="targets"></div>

	<div class="panel" id="graph-container">
	<h3>Кинематика движения V(t)</h3>
	<div class="graph-label">
	<span>Скорость, px/ms</span>
	<span><span style="color:var(--blue)">■</span> speed   <span style="color:var(--red)">┊</span> клик</span>
	</div>
	<canvas class="graph" id="vGraph" width="460" height="90"></canvas>
	<div class="graph-label">
	<span>Изменение направления, °</span>
	<span>0° = прямая, 180° = разворот</span>
	</div>
	<canvas class="graph" id="turnGraph" width="460" height="60"></canvas>
	</div>

	<div class="panel" id="history-panel">
	<h3>История runs (клик — подсветить)</h3>
	<div id="history-list"></div>
	</div>

	<script>
	(function () {
	const canvas = document.getElementById('canvas');
	const ctx = canvas.getContext('2d');
	const vCanvas = document.getElementById('vGraph');
	const vCtx = vCanvas.getContext('2d');
	const tCanvas = document.getElementById('turnGraph');
	const tCtx = tCanvas.getContext('2d');

	function resize() {
	canvas.width = window.innerWidth;
	canvas.height = window.innerHeight;
	}
	window.addEventListener('resize', resize);
	resize();

	// ---------------------------------------------------------------
	// State
	// ---------------------------------------------------------------
	const IDLE_GAP_MS = 300; // gap that separates two distinct "runs"
	const MAX_RUNS_KEPT = 30;
	const FADE_MS = 25000; // slow fade so a screenshot has time to catch the full trail

	let runs = [];
	let currentRun = null;
	let lastPoint = null;
	let runIdCounter = 1;
	let globalMaxSpeed = 0;
	let selectedRun = null; // run picked from history to inspect
	let fadeEnabled = false; // off by default: trails stay on screen until cleared
	let markersEnabled = true;
	let refLineEnabled = true;

	const targetClicks = {}; // id -> [{dx,dy,halfW,halfH}]

	document.getElementById('btn-fade-toggle').addEventListener('click', (e) => {
	fadeEnabled = !fadeEnabled;
	e.target.textContent = 'Затухание следа: ' + (fadeEnabled ? 'вкл' : 'выкл');
	});
	document.getElementById('chk-markers').addEventListener('change', e => markersEnabled = e.target.checked);
	document.getElementById('chk-ref').addEventListener('change', e => refLineEnabled = e.target.checked);

	// ---------------------------------------------------------------
	// Targets
	// ---------------------------------------------------------------
	const DEFAULT_TARGETS = [
	{ id: 'btn-start', label: 'Start Point' },
	{ id: 'btn-target', label: 'Target Button A' },
	{ id: 'btn-submit', label: 'Submit Form B' },
	];

	const targetsContainer = document.getElementById('targets');

	function buildTargets() {
	targetsContainer.innerHTML = '';
	DEFAULT_TARGETS.forEach((t, i) => {
	const btn = document.createElement('button');
	btn.className = 'target-btn';
	btn.id = t.id;
	btn.textContent = t.label;
	const heat = document.createElement('canvas');
	heat.className = 'heatmap';
	heat.width = 44; heat.height = 44;
	btn.appendChild(heat);
	targetsContainer.appendChild(btn);
	if (!targetClicks[t.id]) targetClicks[t.id] = [];
	});
	layoutTargetsDefault();
	}

	function layoutTargetsDefault() {
	const btns = [...targetsContainer.querySelectorAll('.target-btn')];
	const n = btns.length;
	btns.forEach((b, i) => {
	b.style.left = (window.innerWidth * (i + 1) / (n + 1) - 70) + 'px';
	b.style.top = (window.innerHeight / 2 - 30) + 'px';
	b.style.padding = '22px 32px';
	});
	}

	function shuffleTargets() {
	const btns = [...targetsContainer.querySelectorAll('.target-btn')];
	const margin = 120;
	btns.forEach(b => {
	const padV = 14 + Math.random() * 26;
	const padH = 18 + Math.random() * 40;
	b.style.padding = padV.toFixed(0) + 'px ' + padH.toFixed(0) + 'px';
	const w = 90 + padH * 2, h = 40 + padV * 2;
	const x = margin + Math.random() * (window.innerWidth - margin * 2 - w);
	const y = margin + Math.random() * (window.innerHeight - margin * 2 - h);
	b.style.left = x + 'px';
	b.style.top = y + 'px';
	});
	}

	document.getElementById('btn-shuffle').addEventListener('click', shuffleTargets);
	buildTargets();

	// ---------------------------------------------------------------
	// Speed -> color
	// ---------------------------------------------------------------
	function getSpeedColor(speed, max, alpha) {
	const normalized = Math.min(speed / (max \|\| 2.5), 1);
	const hue = (1 - normalized) * 240; // blue (slow) -> red (fast)
	return `hsla(${hue}, 100%, 50%, ${alpha})`;
	}

	// ---------------------------------------------------------------
	// Run management
	// ---------------------------------------------------------------
	function startNewRun(firstPoint) {
	currentRun = {
	id: runIdCounter++,
	points: [firstPoint],
	startTime: firstPoint.t,
	endTime: firstPoint.t,
	maxSpeed: 0,
	click: null,
	};
	runs.push(currentRun);
	if (runs.length > MAX_RUNS_KEPT) runs.shift();
	}

	function addPoint(run, p) {
	const prev = run.points[run.points.length - 1];
	const dt = p.t - prev.t;
	const dist = Math.hypot(p.x - prev.x, p.y - prev.y);
	p.speed = dt > 0 ? dist / dt : 0;
	p.dt = dt;

	// angular change relative to the previous segment (0 = straight line)
	if (run.points.length >= 2) {
	const prev2 = run.points[run.points.length - 2];
	const prevAngle = Math.atan2(prev.y - prev2.y, prev.x - prev2.x);
	const curAngle = Math.atan2(p.y - prev.y, p.x - prev.x);
	let diff = curAngle - prevAngle;
	while (diff > Math.PI) diff -= 2 * Math.PI;
	while (diff < -Math.PI) diff += 2 * Math.PI;
	p.turn = Math.abs(diff) * 180 / Math.PI;
	} else {
	p.turn = 0;
	}

	run.points.push(p);
	run.endTime = p.t;
	if (p.speed > run.maxSpeed) run.maxSpeed = p.speed;
	if (p.speed > globalMaxSpeed) globalMaxSpeed = p.speed;
	}

	function runMetrics(run) {
	const pts = run.points;
	let pathLen = 0;
	const dts = [];
	for (let i = 1; i < pts.length; i++) {
	pathLen += Math.hypot(pts[i].x - pts[i - 1].x, pts[i].y - pts[i - 1].y);
	dts.push(pts[i].dt);
	}
	const straight = Math.hypot(pts[pts.length - 1].x - pts[0].x, pts[pts.length - 1].y - pts[0].y);
	const duration = run.endTime - run.startTime;
	const efficiency = pathLen > 0 ? (straight / pathLen) : 1;
	const avgSpeed = pathLen > 0 && duration > 0 ? pathLen / duration : 0;
	const meanDt = dts.length ? dts.reduce((a, b) => a + b, 0) / dts.length : 0;
	const variance = dts.length ? dts.reduce((a, b) => a + (b - meanDt) ** 2, 0) / dts.length : 0;
	const jitter = Math.sqrt(variance);
	return { pathLen, straight, duration, efficiency, avgSpeed, meanDt, jitter, points: pts.length };
	}

	// ---------------------------------------------------------------
	// Mouse tracking
	// ---------------------------------------------------------------
	window.addEventListener('mousemove', (e) => {
	const now = performance.now();
	const p = { x: e.clientX, y: e.clientY, t: now };

	if (!currentRun \|\| !lastPoint \|\| (now - lastPoint.t) > IDLE_GAP_MS) {
	startNewRun(p);
	} else {
	addPoint(currentRun, p);
	}
	lastPoint = p;

	selectedRun = currentRun; // live-follow the active run
	renderHistoryList();
	updateStatsPanel(currentRun);
	drawKinematicsGraphs(currentRun);
	});

	// ---------------------------------------------------------------
	// Click tracking (offset from target center)
	// ---------------------------------------------------------------
	window.addEventListener('click', (e) => {
	const target = e.target.closest('.target-btn');
	const clickX = e.clientX;
	const clickY = e.clientY;
	const now = performance.now();

	let clickInfo = { x: clickX, y: clickY, t: now, target: null, dx: null, dy: null, dist: null };

	if (target) {
	const rect = target.getBoundingClientRect();
	const centerX = rect.left + rect.width / 2;
	const centerY = rect.top + rect.height / 2;
	const dx = clickX - centerX;
	const dy = clickY - centerY;
	const dist = Math.hypot(dx, dy);

	clickInfo.target = target.id;
	clickInfo.dx = dx; clickInfo.dy = dy; clickInfo.dist = dist;

	targetClicks[target.id].push({ dx, dy, halfW: rect.width / 2, halfH: rect.height / 2 });
	drawHeatmap(target);

	document.getElementById('s-click').textContent =
	`${dist.toFixed(1)}px (x:${dx > 0 ? '+' : ''}${dx.toFixed(0)}, y:${dy > 0 ? '+' : ''}${dy.toFixed(0)})`;
	}

	// attach to the run that this click belongs to (same idle-gap logic)
	if (currentRun && (now - currentRun.endTime) < IDLE_GAP_MS) {
	currentRun.click = clickInfo;
	} else {
	// click with no preceding movement burst -> its own zero-length run
	const p = { x: clickX, y: clickY, t: now, speed: 0, turn: 0, dt: 0 };
	startNewRun(p);
	currentRun.click = clickInfo;
	}

	renderHistoryList();
	drawKinematicsGraphs(currentRun);
	});

	// ---------------------------------------------------------------
	// Per-target click heatmap
	// ---------------------------------------------------------------
	function drawHeatmap(targetEl) {
	const heat = targetEl.querySelector('.heatmap');
	const hctx = heat.getContext('2d');
	const w = heat.width, h = heat.height;
	hctx.clearRect(0, 0, w, h);
	hctx.strokeStyle = '#30363d';
	hctx.beginPath();
	hctx.moveTo(w / 2, 0); hctx.lineTo(w / 2, h);
	hctx.moveTo(0, h / 2); hctx.lineTo(w, h / 2);
	hctx.stroke();

	const history = targetClicks[targetEl.id];
	history.forEach((c, i) => {
	const nx = (c.dx / c.halfW); // -1..1 roughly
	const ny = (c.dy / c.halfH);
	const px = w / 2 + nx * (w / 2 - 3);
	const py = h / 2 + ny * (h / 2 - 3);
	const isLast = i === history.length - 1;
	hctx.beginPath();
	hctx.arc(px, py, isLast ? 2.5 : 1.6, 0, Math.PI * 2);
	hctx.fillStyle = isLast ? '#f85149' : 'rgba(88,166,255,0.7)';
	hctx.fill();
	});
	}

	// ---------------------------------------------------------------
	// Trajectory canvas (persistent rAF loop -> allows trail fade)
	// ---------------------------------------------------------------
	function drawScene() {
	ctx.clearRect(0, 0, canvas.width, canvas.height);
	const now = performance.now();

	runs.forEach(run => {
	const isSelected = run === selectedRun;
	const pts = run.points;

	for (let i = 1; i < pts.length; i++) {
	const age = now - pts[i].t;
	if (fadeEnabled && age > FADE_MS) continue;
	const alpha = fadeEnabled ? Math.max(0.08, 1 - age / FADE_MS) : (isSelected \|\| !selectedRun ? 1 : 0.15);

	ctx.beginPath();
	ctx.moveTo(pts[i - 1].x, pts[i - 1].y);
	ctx.lineTo(pts[i].x, pts[i].y);
	ctx.strokeStyle = getSpeedColor(pts[i].speed \|\| 0, globalMaxSpeed, alpha);
	ctx.lineWidth = isSelected ? 3 : 2;
	ctx.stroke();

	if (markersEnabled) {
	ctx.beginPath();
	ctx.arc(pts[i].x, pts[i].y, 1.5, 0, Math.PI * 2);
	ctx.fillStyle = `rgba(255,255,255,${alpha})`;
	ctx.fill();
	}
	}

	// reference straight line start -> end, to expose curvature at a glance
	if (refLineEnabled && pts.length > 2 && (isSelected \|\| !fadeEnabled)) {
	const first = pts[0], last = pts[pts.length - 1];
	const age = now - last.t;
	if (!fadeEnabled \|\| age < FADE_MS) {
	const alpha = fadeEnabled ? Math.max(0.08, 1 - age / FADE_MS) * 0.5 : 0.35;
	ctx.beginPath();
	ctx.setLineDash([4, 4]);
	ctx.moveTo(first.x, first.y);
	ctx.lineTo(last.x, last.y);
	ctx.strokeStyle = `rgba(210,153,34,${alpha})`;
	ctx.lineWidth = 1;
	ctx.stroke();
	ctx.setLineDash([]);
	}
	}

	if (run.click) {
	const age = now - run.click.t;
	if (!fadeEnabled \|\| age < FADE_MS * 2) {
	const alpha = fadeEnabled ? Math.max(0.15, 1 - age / (FADE_MS * 2)) : 1;
	ctx.beginPath();
	ctx.arc(run.click.x, run.click.y, 8, 0, Math.PI * 2);
	ctx.strokeStyle = `rgba(255,255,255,${alpha})`;
	ctx.lineWidth = 2;
	ctx.stroke();
	ctx.beginPath();
	ctx.arc(run.click.x, run.click.y, 3, 0, Math.PI * 2);
	ctx.fillStyle = `rgba(248,81,73,${alpha})`;
	ctx.fill();

	if (run.click.target) {
	const el = document.getElementById(run.click.target);
	if (el) {
	const rect = el.getBoundingClientRect();
	const cx = rect.left + rect.width / 2, cy = rect.top + rect.height / 2;
	ctx.beginPath();
	ctx.setLineDash([3, 3]);
	ctx.moveTo(cx, cy);
	ctx.lineTo(run.click.x, run.click.y);
	ctx.strokeStyle = `rgba(255,123,114,${alpha})`;
	ctx.stroke();
	ctx.setLineDash([]);
	}
	ctx.font = '11px monospace';
	ctx.fillStyle = `rgba(255,123,114,${alpha})`;
	ctx.fillText(`Δ: ${run.click.dist.toFixed(1)}px`, run.click.x + 12, run.click.y + 4);
	}
	}
	}
	});

	requestAnimationFrame(drawScene);
	}
	requestAnimationFrame(drawScene);

	// ---------------------------------------------------------------
	// Kinematics graphs (speed & direction-change vs. real elapsed time)
	// ---------------------------------------------------------------
	function drawKinematicsGraphs(run) {
	if (!run \|\| run.points.length < 2) return;
	const pts = run.points;
	const duration = Math.max(run.endTime - run.startTime, 40);

	// -- speed graph --
	vCtx.clearRect(0, 0, vCanvas.width, vCanvas.height);
	const w = vCanvas.width, h = vCanvas.height;
	const maxV = Math.max(run.maxSpeed, 0.3);

	vCtx.strokeStyle = '#21262d';
	for (let g = 1; g < 4; g++) {
	const gy = h - (g / 4) * (h - 10) - 5;
	vCtx.beginPath(); vCtx.moveTo(0, gy); vCtx.lineTo(w, gy); vCtx.stroke();
	}

	vCtx.beginPath();
	vCtx.strokeStyle = '#58a6ff';
	vCtx.lineWidth = 1.5;
	pts.forEach((p, i) => {
	const x = ((p.t - run.startTime) / duration) * w;
	const y = h - ((p.speed \|\| 0) / maxV) * (h - 10) - 5;
	if (i === 0) vCtx.moveTo(x, y); else vCtx.lineTo(x, y);
	});
	vCtx.stroke();

	if (run.click) {
	const cx = Math.min(w, ((run.click.t - run.startTime) / duration) * w);
	vCtx.beginPath();
	vCtx.strokeStyle = '#f85149';
	vCtx.setLineDash([3, 3]);
	vCtx.moveTo(cx, 0); vCtx.lineTo(cx, h);
	vCtx.stroke();
	vCtx.setLineDash([]);
	}

	// -- direction-change graph --
	tCtx.clearRect(0, 0, tCanvas.width, tCanvas.height);
	const tw = tCanvas.width, th = tCanvas.height;
	tCtx.strokeStyle = '#21262d';
	const midY = th - (90 / 180) * (th - 6) - 3;
	tCtx.beginPath(); tCtx.moveTo(0, midY); tCtx.lineTo(tw, midY); tCtx.stroke();

	tCtx.beginPath();
	tCtx.strokeStyle = '#3fb950';
	tCtx.lineWidth = 1.5;
	pts.forEach((p, i) => {
	const x = ((p.t - run.startTime) / duration) * tw;
	const y = th - ((p.turn \|\| 0) / 180) * (th - 6) - 3;
	if (i === 0) tCtx.moveTo(x, y); else tCtx.lineTo(x, y);
	});
	tCtx.stroke();
	}

	// ---------------------------------------------------------------
	// Stats panel
	// ---------------------------------------------------------------
	function updateStatsPanel(run) {
	const m = runMetrics(run);
	document.getElementById('s-pts').textContent = m.points;
	document.getElementById('s-dur').textContent = m.duration.toFixed(0) + ' ms';
	document.getElementById('s-path').textContent = `${m.pathLen.toFixed(0)} / ${m.straight.toFixed(0)} px`;
	document.getElementById('s-eff').textContent =
	(m.efficiency * 100).toFixed(0) + '% ' + (m.efficiency > 0.97 ? '(почти прямая)' : m.efficiency > 0.8 ? '(лёгкая кривизна)' : '(выраженная кривизна)');
	document.getElementById('s-v').textContent = `${m.avgSpeed.toFixed(2)} / ${run.maxSpeed.toFixed(2)} px/ms`;
	document.getElementById('s-jitter').textContent =
	m.jitter > 0 ? `${m.jitter.toFixed(2)} ms (${m.jitter < 1 ? 'равномерно, похоже на робота' : 'вариативно'})` : '—';
	document.getElementById('s-maxv-all').textContent = globalMaxSpeed.toFixed(2) + ' px/ms';
	}

	// ---------------------------------------------------------------
	// History list
	// ---------------------------------------------------------------
	function renderHistoryList() {
	const list = document.getElementById('history-list');
	list.innerHTML = '';
	for (let i = runs.length - 1; i >= 0; i--) {
	const run = runs[i];
	const m = runMetrics(run);
	const div = document.createElement('div');
	div.className = 'run-entry' + (run === selectedRun ? ' selected' : '');
	const clickTxt = run.click && run.click.dist != null ? `, клик Δ${run.click.dist.toFixed(0)}px` : (run.click ? ', клик мимо мишени' : '');
	div.innerHTML = `<b>Run #${run.id}</b> — ${m.duration.toFixed(0)}ms, ${m.points}pt, лин. ${(m.efficiency * 100).toFixed(0)}%${clickTxt}`;
	div.addEventListener('click', () => {
	selectedRun = run;
	renderHistoryList();
	updateStatsPanel(run);
	drawKinematicsGraphs(run);
	});
	list.appendChild(div);
	}
	}

	// ---------------------------------------------------------------
	// Controls: clear / export
	// ---------------------------------------------------------------
	document.getElementById('btn-clear').addEventListener('click', () => {
	runs = [];
	currentRun = null;
	lastPoint = null;
	selectedRun = null;
	globalMaxSpeed = 0;
	Object.keys(targetClicks).forEach(k => targetClicks[k] = []);
	document.querySelectorAll('.heatmap').forEach(h => h.getContext('2d').clearRect(0, 0, h.width, h.height));
	renderHistoryList();
	vCtx.clearRect(0, 0, vCanvas.width, vCanvas.height);
	tCtx.clearRect(0, 0, tCanvas.width, tCanvas.height);
	document.getElementById('s-click').textContent = '—';
	document.getElementById('s-maxv-all').textContent = '0';
	});

	document.getElementById('btn-export').addEventListener('click', () => {
	const data = {
	exportedAt: new Date().toISOString(),
	runs: runs.map(r => ({
	id: r.id,
	startTime: r.startTime,
	endTime: r.endTime,
	click: r.click,
	points: r.points.map(p => ({ x: p.x, y: p.y, t: p.t, speed: p.speed \|\| 0, turn: p.turn \|\| 0, dt: p.dt \|\| 0 })),
	metrics: runMetrics(r),
	})),
	targetClicks,
	};
	const blob = new Blob([JSON.stringify(data, null, 2)], { type: 'application/json' });
	const url = URL.createObjectURL(blob);
	const a = document.createElement('a');
	a.href = url;
	a.download = `humanize-trace-${Date.now()}.json`;
	a.click();
	URL.revokeObjectURL(url);
	});

	renderHistoryList();

	// ---------------------------------------------------------------
	// Keyboard tracking: dwell (keydown->keyup) & flight (gap before a key)
	// ---------------------------------------------------------------
	const typingInput = document.getElementById('typing-input');
	const flightCanvas = document.getElementById('flightGraph');
	const flightCtx = flightCanvas.getContext('2d');
	const dwellCanvas = document.getElementById('dwellGraph');
	const dwellCtx = dwellCanvas.getContext('2d');

	const KB_IDLE_GAP_MS = 2000; // pause that starts a fresh typing "run"
	let kbEvents = []; // events of the current typing run
	let kbRunStart = null;
	const pendingKeyDowns = new Map(); // e.code -> {t, key}
	let lastKeyUpTime = null;

	function isTrackedKey(e) {
	return e.key.length === 1 \|\| e.key === 'Backspace' \|\| e.key === 'Enter';
	}

	function stdDev(arr) {
	if (!arr.length) return 0;
	const mean = arr.reduce((a, b) => a + b, 0) / arr.length;
	return Math.sqrt(arr.reduce((a, b) => a + (b - mean) ** 2, 0) / arr.length);
	}

	typingInput.addEventListener('keydown', (e) => {
	if (!isTrackedKey(e) \|\| e.repeat) return;
	const now = performance.now();
	const lastEventTime = kbEvents.length ? kbEvents[kbEvents.length - 1].upT : kbRunStart;
	if (!kbRunStart \|\| (now - lastEventTime) > KB_IDLE_GAP_MS) {
	kbEvents = [];
	kbRunStart = now;
	lastKeyUpTime = null;
	}
	pendingKeyDowns.set(e.code, { t: now, key: e.key });
	});

	typingInput.addEventListener('keyup', (e) => {
	const down = pendingKeyDowns.get(e.code);
	if (!down) return;
	pendingKeyDowns.delete(e.code);
	const now = performance.now();
	const dwell = now - down.t;
	const flight = lastKeyUpTime !== null ? down.t - lastKeyUpTime : null;
	kbEvents.push({ key: down.key, downT: down.t, upT: now, dwell, flight });
	lastKeyUpTime = now;
	updateKeyboardStats();
	drawKeyboardGraphs();
	});

	document.getElementById('btn-kb-clear').addEventListener('click', () => {
	typingInput.value = '';
	kbEvents = [];
	kbRunStart = null;
	lastKeyUpTime = null;
	pendingKeyDowns.clear();
	updateKeyboardStats();
	flightCtx.clearRect(0, 0, flightCanvas.width, flightCanvas.height);
	dwellCtx.clearRect(0, 0, dwellCanvas.width, dwellCanvas.height);
	});

	function updateKeyboardStats() {
	const n = kbEvents.length;
	document.getElementById('kb-count').textContent = n;
	if (!n) {
	document.getElementById('kb-dur').textContent = '0 ms';
	document.getElementById('kb-speed').textContent = '0 CPM';
	document.getElementById('kb-flight').textContent = '— / —';
	document.getElementById('kb-dwell').textContent = '— / —';
	return;
	}
	const duration = Math.max(kbEvents[n - 1].upT - kbRunStart, 1);
	const flights = kbEvents.map(k => k.flight).filter(v => v !== null);
	const dwells = kbEvents.map(k => k.dwell);
	const avgFlight = flights.length ? flights.reduce((a, b) => a + b, 0) / flights.length : 0;
	const avgDwell = dwells.reduce((a, b) => a + b, 0) / dwells.length;
	const cpm = (n / duration) * 60000;

	document.getElementById('kb-dur').textContent = duration.toFixed(0) + ' ms';
	document.getElementById('kb-speed').textContent = `${cpm.toFixed(0)} CPM (~${(cpm / 5).toFixed(0)} WPM)`;
	document.getElementById('kb-flight').textContent =
	flights.length ? `${avgFlight.toFixed(0)} / ${stdDev(flights).toFixed(0)} ms` : '— / —';
	document.getElementById('kb-dwell').textContent = `${avgDwell.toFixed(0)} / ${stdDev(dwells).toFixed(0)} ms`;
	}

	function drawKeyboardGraphs() {
	const n = kbEvents.length;
	if (!n) return;
	const duration = Math.max(kbEvents[n - 1].upT - kbRunStart, 40);

	// flight time: gap before each keystroke -> the typing rhythm
	flightCtx.clearRect(0, 0, flightCanvas.width, flightCanvas.height);
	const fw = flightCanvas.width, fh = flightCanvas.height;
	const flightVals = kbEvents.map(k => k.flight).filter(v => v !== null);
	const maxFlight = Math.max(...flightVals, 60);
	flightCtx.beginPath();
	flightCtx.strokeStyle = '#58a6ff';
	flightCtx.lineWidth = 1.5;
	let started = false;
	kbEvents.forEach((k) => {
	if (k.flight === null) return;
	const x = ((k.downT - kbRunStart) / duration) * fw;
	const y = fh - (Math.min(k.flight, maxFlight) / maxFlight) * (fh - 10) - 5;
	if (!started) { flightCtx.moveTo(x, y); started = true; } else flightCtx.lineTo(x, y);
	flightCtx.fillRect(x - 1.5, y - 1.5, 3, 3);
	});
	flightCtx.stroke();

	// dwell time: how long each key was physically held down
	dwellCtx.clearRect(0, 0, dwellCanvas.width, dwellCanvas.height);
	const dw = dwellCanvas.width, dh = dwellCanvas.height;
	const maxDwell = Math.max(...kbEvents.map(k => k.dwell), 60);
	dwellCtx.beginPath();
	dwellCtx.strokeStyle = '#3fb950';
	dwellCtx.lineWidth = 1.5;
	kbEvents.forEach((k, i) => {
	const x = ((k.downT - kbRunStart) / duration) * dw;
	const y = dh - (Math.min(k.dwell, maxDwell) / maxDwell) * (dh - 10) - 5;
	if (i === 0) dwellCtx.moveTo(x, y); else dwellCtx.lineTo(x, y);
	dwellCtx.fillRect(x - 1.5, y - 1.5, 3, 3);
	});
	dwellCtx.stroke();
	}
	})();
	</script>
	</body>
	</html>