<?php
/**
 * FINAL-PACK MAINTENANCE CHARTER -- DO NOT DELETE.
 * This comment is the standalone operating soul for this PHP after the
 * workbench, plans, and logs are gone. Repair observed failures; do not invent
 * a different product because a feature sounds plausible.
 *
 * UNIVERSAL LAW: one stock-PHP file; no composer/npm/database dependency; no
 * visitor signup, recovery account, tracking profile, shared bank, SSO, or
 * paywall on basic use. Keep ?src=1 and ?download=1 auditable. This host owns
 * only its own data, vault, and operator panel. A panel is never a visitor
 * identity. Public status must never disclose vault/filesystem detail, and
 * admin passwords belong in POST bodies, never URLs.
 *
 * SOUL: This is the NOSIGNUP MAP, not a hub dashboard. After the free
 * Options / Mirrors / Donate / I AGREE entry, a living black pinwheel is the
 * product: fixed sister spokes plus an equal-weight center "?" pool.
 * KEEP WORKING: the every-load consent gate, visible "?" hub face, seven
 * product spokes, equal pool, Morse and ASL as the only thin in-file sketches,
 * optional Donate, source/download, and host-local panel.
 * NEVER BECOME: a TRAIN/Morse product, skill academy, third sketch collection,
 * visitor wallet/faucet/ledger, shared empire bank, SSO, MIRROR re-skin, or a
 * paused-for-aim wheel. Reduced motion may calm animation; interaction must
 * not freeze the product.
 * CHANGE BOUNDARY: fix a proven gate, map, truth, accessibility, or security
 * failure only. The com/org/net triad is one product: edit this canonical file,
 * synchronize the two mirrors, and never create a quiet per-TLD fork.
 * PROOF: PHP lint; canonical/mirror/root/pack byte parity; entry and map path
 * check; then live source parity after deployment.
 */
/**
 * DO NOT DELETE — NOSIGNUP HUB AB TRIAD (com / org / net)
 * SPIRIT: MAP pinwheel — free forever empire front door.
 * FREEZE: same PHP ×3 hosts; each host OWN vault/data/panel (not shared bank).
 * Edit cells/com.php only → tools/sync-hub-ab.ps1 → deploy triad.
 * - Spokes = fixed NSU products. Center "?" = equal-weight pool
 *   (NSU product URLs + in-file sketches). Hub face always "?" (never TRAIN).
 * - Sketches GATED: Morse v1 + ASL only (binaural practice/test). No third skill.
 * - Pre-ENTER: Options · Mirrors · Donate + I AGREE. ?src=1 / ?download=1.
 * - DNA: black stage bg1–bg7; 7 CSS spokes orbit; NEVER pause on hover; map IS product post-ENTER.
 * REFUSE: visitor wallet/faucet/ledger · third sketch · pause-for-aim · TRAIN face · shared bank/SSO · empire throat.
 */
/**
 * FILE MAP (cells/com.php — hub AB canonical; org/net mirrors):
 *   charter + hub DND .............. header comments above (law / freeze)
 *   hub helpers .................... nsp_hub_variant/label, sketch catalog, product/? pools
 *   vault / panel secrets .......... nsp_vault_dir, data dir, site.seed, pass hash, nsp_ok/require
 *   admin API ...................... nsp_handle_admin_api (seed-gate setup/login/source)
 *   controlpanel renderer .......... nsp_render_controlpanel (?controlpanel; seed primary)
 *   skill sketch ................... nsp_render_skill_sketch (Morse/ASL)
 *   routes ......................... ?src/?download · admin_* · panel · ?sketch=
 *   MAP HTML/CSS ................... main document: bg cycle + pinwheel geometry
 *   entry gate CSS ................. .ns-entry / .ns-sub base + polish + designer
 *   pinwheel DOM ................... .square_pinwheel_container spokes + center "?"
 *   entry boot JS .................. data-ns-entry-boot: agree, modals, hub pool, dbg
 */
declare(strict_types=1);

/**
 * LORD rent credit (NSU units) when rent/claim is ever wired for this crop.
 * Placeholder — tune to a reality-scaled optimum later.
 * Hub crop has no visitor ledger / mint path this ship; define only.
 */
const LORD_RENT_CREDIT = 10000;

/** AB hub domain tag: com | org | net (from Host header; default com). */
function nsp_hub_variant(): string {
    $h = strtolower((string)($_SERVER['HTTP_HOST'] ?? ''));
    $h = preg_replace('/:\d+$/', '', $h) ?? $h;
    $h = preg_replace('/^www\./', '', $h) ?? $h;
    if (str_contains($h, 'nosignup.org') || $h === 'org') return 'org';
    if (str_contains($h, 'nosignup.net') || $h === 'net') return 'net';
    return 'com';
}
function nsp_hub_label(): string {
    $v = nsp_hub_variant();
    return 'Nosignup.' . strtoupper($v === 'com' ? 'Com' : ($v === 'org' ? 'Org' : 'Net'));
}

/**
 * Hardcoded website / sketch memory for center "?".
 * Equal-weight random with NSU product URLs (see front-end pool).
 * kind sketch → same origin ?sketch=id  |  kind url → external.
 * Tack projects here — the PHP file is the repository.
 */
function nsp_sketch_catalog(): array {
    return [
        ['id' => 'morse', 'kind' => 'sketch', 'label' => 'Morse (binaural trainer)', 'href' => '?sketch=morse'],
        ['id' => 'asl', 'kind' => 'sketch', 'label' => 'ASL (binaural skill deck)', 'href' => '?sketch=asl'],
        // Add more custom sites here: ['id'=>'x','kind'=>'sketch','label'=>'…','href'=>'?sketch=x'],
    ];
}
/** NSU empire products always in the ? pool (equal weight with sketches). */
function nsp_product_pool(): array {
    return [
        ['id' => 'trade', 'kind' => 'url', 'label' => 'Trade', 'href' => 'https://nosignup.trade/'],
        ['id' => 'chat', 'kind' => 'url', 'label' => 'Chat', 'href' => 'https://nosignup.chat/'],
        ['id' => 'work', 'kind' => 'url', 'label' => 'Work', 'href' => 'https://nosignup.work/'],
        ['id' => 'market', 'kind' => 'url', 'label' => 'Market', 'href' => 'https://nosignup.market/'],
        ['id' => 'date', 'kind' => 'url', 'label' => 'Date', 'href' => 'https://nosignup.date/'],
        ['id' => 'fun', 'kind' => 'url', 'label' => 'Fun', 'href' => 'https://nosignup.fun/'],
        ['id' => 'info', 'kind' => 'url', 'label' => 'Info', 'href' => 'https://nosignup.info/'],
    ];
}
function nsp_hub_random_pool(): array {
    return array_merge(nsp_product_pool(), nsp_sketch_catalog());
}

/* ---- SITE-LOCAL CONTROL PANEL (renter key; not OS root) ---- */
function nsp_vault_dir(): string {
    $sib = dirname(__DIR__) . DIRECTORY_SEPARATOR . 'vault';
    $loc = __DIR__ . DIRECTORY_SEPARATOR . 'vault';
    foreach ([$sib, $loc] as $d) {
        if (is_dir($d) || @mkdir($d, 0700, true)) {
            if (is_dir($d) && is_writable($d)) return $d;
        }
    }
    return $sib;
}
function nsp_data_dir(): string {
    $d = __DIR__ . DIRECTORY_SEPARATOR . 'data';
    if (!is_dir($d)) @mkdir($d, 0755, true);
    $ht = $d . DIRECTORY_SEPARATOR . '.htaccess';
    if (!is_file($ht)) @file_put_contents($ht, "Require all denied\nDeny from all\n");
    return $d;
}
function nsp_hash_file(): string { return nsp_data_dir() . DIRECTORY_SEPARATOR . 'admin.pass.hash'; }
function nsp_seed_file(): string { return nsp_data_dir() . DIRECTORY_SEPARATOR . 'site.seed'; }
function nsp_norm_seed(string $s): string {
    return strtolower(trim(preg_replace('/\s+/', ' ', $s) ?? ''));
}
/** Identity surface only (same scheme as trade); hub has no visitor spend ledger. */
function nsp_addr_from_seed(string $seed): string {
    return hash('sha256', 'nsu-addr-v1|' . nsp_norm_seed($seed));
}
/**
 * 12-word site seed (not BIP39). CSPRNG into fixed word pool.
 * Panel unlock for THIS host only — not a faucet mint (hub has no visitor NSU).
 */
function nsp_generate_site_seed(): string {
    static $wl = [
        'able','acid','aged','also','aqua','arch','area','army','atom','aunt','auto','avoid',
        'axis','baby','band','bank','bare','barn','base','bean','bear','belt','bike','bind',
        'bird','bite','blue','boat','body','bold','bolt','bone','book','boot','born','bowl',
        'brass','brave','bread','brick','brief','bring','broad','broke','brown','brush','build','bulk',
        'burn','burst','bush','busy','cable','cage','cake','calm','camp','cane','cape','card',
        'care','cart','case','cash','cast','cave','cell','cent','chat','chef','chin','chip',
        'city','clap','clay','clip','club','coal','coat','code','coil','coin','cold','come',
        'cook','cool','cope','copy','cord','core','corn','cost','cove','crab','crew','crop',
        'crow','cube','cult','curb','cure','curl','dark','dart','dash','data','dawn','deal',
        'dear','deck','deep','deer','desk','dial','dice','diet','dine','dirt','disc','dock',
        'dome','done','door','dose','down','draw','drip','drop','drum','dual','duck','dune',
        'dusk','dust','duty','each','earn','east','easy','echo','edge','edit','else','emit',
        'epic','even','ever','evil','exit','face','fact','fade','fail','fair','fall','fame',
        'farm','fast','fate','fear','feed','feel','fern','file','fill','film','find','fine',
        'fire','firm','fish','flag','flat','flee','flip','flow','foam','foil','fold','font',
        'food','fool','foot','ford','fork','form','fort','foul','four','free','frog','from',
        'fuel','full','fund','fuse','gain','game','gate','gear','gene','gift','girl','give',
        'glad','glow','glue','goal','goat','gold','golf','good','grab','grad','gram','gray',
        'grid','grim','grin','grip','grow','gulf','guru','hail','hair','half','hall','hand',
        'hang','hard','harm','harp','hate','have','hawk','haze','head','heal','heap','heat',
        'heed','heel','held','help','herb','here','hero','hide','high','hill','hint','hire',
        'hold','hole','home','hood','hook','hope','horn','host','hour','huge','hull','hung',
        'hunt','hurt','icon','idea','idle','inch','info','into','iron','item','jade','jail',
        'jazz','join','joke','jump','june','jury','just','keen','keep','kept','kick','kind',
        'king','kite','knee','knew','knit','knot','know','lace','lack','lady','lake','lamp',
        'land','lane','last','late','lava','lawn','lead','leaf','lean','left','lend','lens',
    ];
    $n = count($wl);
    $bytes = random_bytes(12);
    $out = [];
    for ($i = 0; $i < 12; $i++) {
        $out[] = $wl[ord($bytes[$i]) % $n];
    }
    return implode(' ', $out);
}
/** Owner-only vault note: site seed = panel unlock for THIS host. Never to renters. */
function nsp_vault_site_seed_note(string $seed): void {
    $d = nsp_vault_dir();
    if (!is_dir($d) && !@mkdir($d, 0700, true)) {
        return;
    }
    @chmod($d, 0700);
    $v = nsp_hub_variant();
    $body = 'NOSIGNUP.' . strtoupper($v) . " HUB SITE WALLET SEED (OWNER ONLY)\n"
        . "This seed unlocks /controlpanel for THIS host only (com/org/net each own vault+data).\n"
        . "Hub has no visitor NSU ledger or mint on this crop. NO RECOVERY.\n"
        . "Renters must NOT receive this secret.\n"
        . "Generated: " . gmdate('c') . "\n\n"
        . trim($seed) . "\n";
    @file_put_contents($d . DIRECTORY_SEPARATOR . 'SITE_WALLET_SEED.txt', $body, LOCK_EX);
    @chmod($d . DIRECTORY_SEPARATOR . 'SITE_WALLET_SEED.txt', 0600);
}
/** True if $seed matches data/site.seed (normalized). */
function nsp_panel_seed_ok(string $seed): bool {
    $seed = nsp_norm_seed($seed);
    if ($seed === '') {
        return false;
    }
    $path = nsp_seed_file();
    if (!is_file($path)) {
        return false;
    }
    $have = nsp_norm_seed((string)@file_get_contents($path));
    if ($have === '') {
        return false;
    }
    return hash_equals($have, $seed);
}
/**
 * Ensure data/site.seed exists; mirror to vault SITE_WALLET_SEED.txt on first write.
 * Idempotent. Call before admin API so setup is never land-grabable.
 * NOT a treasury faucet mint — hub has no visitor ledger this crop.
 */
function nsp_ensure_site_seed(): void {
    $path = nsp_seed_file();
    if (is_file($path) && nsp_norm_seed((string)@file_get_contents($path)) !== '') {
        $vd = nsp_vault_dir();
        $note = $vd . DIRECTORY_SEPARATOR . 'SITE_WALLET_SEED.txt';
        if (!is_file($note) || trim((string)@file_get_contents($note)) === '') {
            nsp_vault_site_seed_note(nsp_norm_seed((string)@file_get_contents($path)));
        }
        return;
    }
    $seed = nsp_generate_site_seed();
    file_put_contents($path, $seed . "\n", LOCK_EX);
    @chmod($path, 0600);
    nsp_vault_site_seed_note($seed);
}
function nsp_vault_write(string $plain): void {
    $d = nsp_vault_dir();
    @chmod($d, 0700);
    $v = nsp_hub_variant();
    @file_put_contents($d . DIRECTORY_SEPARATOR . 'README.txt',
        'NOSIGNUP.' . strtoupper($v) . " HUB VAULT - ROOT/OPERATOR ONLY\n"
        . "Site seed unlocks /controlpanel (SITE_WALLET_SEED.txt + data/site.seed).\n"
        . "Legacy admin password (optional migrate): ADMIN_PASSWORD.txt\n"
        . "No visitor NSU ledger on MAP. " . gmdate('c') . "\n", LOCK_EX);
    @file_put_contents($d . DIRECTORY_SEPARATOR . 'ADMIN_PASSWORD.txt', $plain . "\n", LOCK_EX);
    @chmod($d . DIRECTORY_SEPARATOR . 'ADMIN_PASSWORD.txt', 0600);
    $ht = $d . DIRECTORY_SEPARATOR . '.htaccess';
    if (!is_file($ht)) @file_put_contents($ht, "Require all denied\nDeny from all\n");
}
function nsp_json(array $x, int $c = 200): void {
    http_response_code($c);
    header('Content-Type: application/json; charset=UTF-8');
    header('Cache-Control: no-store');
    echo json_encode($x, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
    exit;
}

/* ---- MORSE-v2 organism telemetry (ethos §11–12; NOT accounts) ---- */
const NSP_MORSE_MAX_POST = 1048576;
const NSP_MORSE_MASTERY_EXPOSURE_BUDGET = 50;
const NSP_MORSE_MASTERY_ATTEMPT_BUDGET = 12;
const NSP_MORSE_MASTERY_WINDOW = 5;
const NSP_MORSE_MASTERY_REQUIRED = 4;
const NSP_MORSE_MASTERY_MAX_MEDIAN_MS = 2500;
const NSP_MORSE_MAX_RECENT = 800;

function nsp_morse_data_dir(): string {
    $d = nsp_data_dir() . DIRECTORY_SEPARATOR . 'morse';
    if (!is_dir($d)) {
        @mkdir($d, 0700, true);
    }
    if (is_dir($d)) {
        @chmod($d, 0700);
        $ht = $d . DIRECTORY_SEPARATOR . '.htaccess';
        if (!is_file($ht)) {
            @file_put_contents($ht, "Require all denied\nDeny from all\n", LOCK_EX);
        }
        $idx = $d . DIRECTORY_SEPARATOR . 'index.html';
        if (!is_file($idx)) {
            @file_put_contents($idx, "", LOCK_EX);
        }
    }
    return $d;
}
function nsp_morse_salt(): string {
    $f = nsp_morse_data_dir() . DIRECTORY_SEPARATOR . '.salt';
    if (!is_file($f)) {
        @file_put_contents($f, bin2hex(random_bytes(32)), LOCK_EX);
        @chmod($f, 0600);
    }
    $s = trim((string)@file_get_contents($f));
    if ($s === '') {
        $s = bin2hex(random_bytes(32));
        @file_put_contents($f, $s, LOCK_EX);
        @chmod($f, 0600);
    }
    return $s;
}
/** HMAC(IP|UA, salt) — raw IP never written. */
function nsp_morse_visitor_hash(): string {
    $ip = (string)($_SERVER['REMOTE_ADDR'] ?? '0.0.0.0');
    $ua = (string)($_SERVER['HTTP_USER_AGENT'] ?? '');
    return substr(hash_hmac('sha256', $ip . '|' . $ua, nsp_morse_salt()), 0, 32);
}
function nsp_morse_ua_hash(): string {
    $ua = (string)($_SERVER['HTTP_USER_AGENT'] ?? '');
    return substr(hash_hmac('sha256', $ua, nsp_morse_salt()), 0, 16);
}
function nsp_morse_clean($v, int $max = 200): string {
    $s = is_scalar($v) ? (string)$v : '';
    $s = preg_replace('/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F]/', '', $s) ?? '';
    return substr($s, 0, $max);
}
function nsp_morse_rows_file(): string {
    return nsp_morse_data_dir() . DIRECTORY_SEPARATOR . 'visitor_stats.jsonl';
}
function nsp_morse_read_rows($fh): array {
    rewind($fh);
    $rows = [];
    while (($line = fgets($fh)) !== false) {
        $line = rtrim($line, "\r\n");
        if ($line === '' || !str_contains($line, "\t")) continue;
        [$id, $json] = explode("\t", $line, 2);
        $id = preg_replace('/[^a-f0-9]/', '', $id) ?? '';
        if ($id === '') continue;
        $decoded = json_decode($json, true);
        if (is_array($decoded)) $rows[$id] = $decoded;
    }
    return $rows;
}
function nsp_morse_write_rows($fh, array $rows): void {
    ftruncate($fh, 0);
    rewind($fh);
    foreach ($rows as $id => $row) {
        $id = preg_replace('/[^a-f0-9]/', '', (string)$id) ?? '';
        if ($id === '') continue;
        fwrite($fh, $id . "\t" . json_encode($row, JSON_UNESCAPED_SLASHES) . "\n");
    }
    fflush($fh);
    @chmod(nsp_morse_rows_file(), 0600);
}
/**
 * @param bool $hard if true, API-style 500 exit on open/write failure; if false, return null (fail-open for page render).
 */
function nsp_morse_with_rows(callable $fn, bool $hard = true) {
    nsp_morse_data_dir();
    $fh = @fopen(nsp_morse_rows_file(), 'c+');
    if (!$fh) {
        if ($hard) nsp_json(['ok' => false, 'err' => 'morse stats open fail'], 500);
        return null;
    }
    flock($fh, LOCK_EX);
    try {
        $rows = nsp_morse_read_rows($fh);
        $result = $fn($rows);
        if (is_array($result) && array_key_exists('__rows', $result)) {
            nsp_morse_write_rows($fh, $result['__rows']);
            unset($result['__rows']);
        }
        flock($fh, LOCK_UN);
        fclose($fh);
        return $result;
    } catch (Throwable $e) {
        flock($fh, LOCK_UN);
        fclose($fh);
        if ($hard) nsp_json(['ok' => false, 'err' => 'morse stats write fail'], 500);
        return null;
    }
}
function nsp_morse_safe_snapshot(array $s): array {
    return [
        'assignedCondition' => nsp_morse_clean($s['assignedCondition'] ?? '', 8),
        'morseWpm' => max(5, min(40, (float)($s['morseWpm'] ?? 18))),
        'spinEnabled' => !empty($s['spinEnabled']),
        'spinSweepEnabled' => !empty($s['spinSweepEnabled']),
        'binauralEnabled' => !empty($s['binauralEnabled']),
        'spreadSweepEnabled' => !empty($s['spreadSweepEnabled']),
        'lowOscillatorEnabled' => !empty($s['lowOscillatorEnabled']),
        'lowOscillatorSweepEnabled' => !empty($s['lowOscillatorSweepEnabled']),
        'spinHz' => round(max(0, min(20, (float)($s['spinHz'] ?? 0))), 3),
        'spreadHz' => round(max(0, min(40, (float)($s['spreadHz'] ?? 0))), 3),
        'lowOscHz' => round(max(0, min(20, (float)($s['lowOscHz'] ?? 0))), 3),
        'fieldVolume' => round(max(0, min(100, (float)($s['fieldVolume'] ?? 0))), 3),
        'movementDepth' => round(max(0, min(100, (float)($s['movementDepth'] ?? 0))), 3),
    ];
}
function nsp_morse_safe_event(array $e): ?array {
    $event = nsp_morse_clean($e['event'] ?? '', 40);
    if (!in_array($event, ['heard', 'test-answer', 'mastery'], true)) return null;
    $char = strtolower(nsp_morse_clean($e['char'] ?? '', 1));
    if (!preg_match('/^[a-z0-9]$/', $char)) return null;
    $out = [
        'at' => nsp_morse_clean($e['at'] ?? '', 40),
        'event' => $event,
        'mode' => nsp_morse_clean($e['mode'] ?? '', 20),
        'char' => $char,
        'snapshot' => nsp_morse_safe_snapshot(is_array($e['snapshot'] ?? null) ? $e['snapshot'] : []),
    ];
    if ($event === 'test-answer') {
        $answer = strtolower(nsp_morse_clean($e['answer'] ?? '', 1));
        $out['answer'] = preg_match('/^[a-z0-9]$/', $answer) ? $answer : '';
        $out['correct'] = !empty($e['correct']);
        $out['responseMs'] = max(0, min(600000, (int)($e['responseMs'] ?? 0)));
    }
    if ($event === 'mastery') {
        $out['exposuresToMastery'] = max(0, min(100000, (int)($e['exposuresToMastery'] ?? 0)));
        $out['attemptsToMastery'] = max(0, min(100000, (int)($e['attemptsToMastery'] ?? 0)));
        $out['msToMastery'] = max(0, min(31536000000, (int)($e['msToMastery'] ?? 0)));
        $out['medianResponseMsAtMastery'] = max(0, min(600000, (int)($e['medianResponseMsAtMastery'] ?? 0)));
        $out['successWithinBudget'] = !empty($e['successWithinBudget']);
    }
    return $out;
}
function nsp_morse_safe_chars(array $stats): array {
    $chars = is_array($stats['chars'] ?? null) ? $stats['chars'] : [];
    $out = [];
    foreach ($chars as $char => $c) {
        $char = strtolower(nsp_morse_clean($char, 1));
        if (!preg_match('/^[a-z0-9]$/', $char) || !is_array($c)) continue;
        $heard = max(0, min(1000000, (int)($c['heard'] ?? 0)));
        $testAttempts = max(0, min(1000000, (int)($c['testAttempts'] ?? 0)));
        $mastered = !empty($c['mastered']);
        $out[$char] = [
            'heard' => $heard,
            'practiceHeard' => max(0, min(1000000, (int)($c['practiceHeard'] ?? 0))),
            'testAttempts' => $testAttempts,
            'correct' => max(0, min(1000000, (int)($c['correct'] ?? 0))),
            'wrong' => max(0, min(1000000, (int)($c['wrong'] ?? 0))),
            'mastered' => $mastered,
            'eligibleForSuccess' => $mastered || $heard >= NSP_MORSE_MASTERY_EXPOSURE_BUDGET || $testAttempts >= NSP_MORSE_MASTERY_ATTEMPT_BUDGET,
            'successWithinBudget' => !empty($c['successWithinBudget']),
            'exposuresToMastery' => $mastered ? max(0, min(1000000, (int)($c['exposuresToMastery'] ?? 0))) : null,
            'attemptsToMastery' => $mastered ? max(0, min(1000000, (int)($c['attemptsToMastery'] ?? 0))) : null,
            'msToMastery' => $mastered ? max(0, min(31536000000, (int)($c['msToMastery'] ?? 0))) : null,
            'medianResponseMsAtMastery' => $mastered ? max(0, min(600000, (int)($c['medianResponseMsAtMastery'] ?? 0))) : null,
            'masteryCondition' => nsp_morse_clean($c['masteryCondition'] ?? ($stats['assignedCondition'] ?? ''), 8),
        ];
    }
    return $out;
}
function nsp_morse_safe_payload(array $payload): array {
    $stats = is_array($payload['stats'] ?? null) ? $payload['stats'] : [];
    $recent = is_array($stats['recent'] ?? null) ? $stats['recent'] : [];
    $safeRecent = [];
    foreach (array_slice($recent, -NSP_MORSE_MAX_RECENT) as $e) {
        if (is_array($e)) {
            $safe = nsp_morse_safe_event($e);
            if ($safe) $safeRecent[] = $safe;
        }
    }
    return [
        'clientVersion' => nsp_morse_clean($payload['clientVersion'] ?? 'hub-morse-v2', 40),
        'event' => nsp_morse_clean($payload['event'] ?? '', 40),
        'assignedCondition' => nsp_morse_clean($payload['assignedCondition'] ?? '', 8),
        'localCreatedAt' => nsp_morse_clean($stats['createdAt'] ?? '', 40),
        'localUpdatedAt' => nsp_morse_clean($stats['updatedAt'] ?? '', 40),
        'totals' => [
            'totalHeard' => max(0, (int)($stats['totalHeard'] ?? 0)),
            'testPrompts' => max(0, (int)($stats['testPrompts'] ?? 0)),
            'testAttempts' => max(0, (int)($stats['testAttempts'] ?? 0)),
            'testCorrect' => max(0, (int)($stats['testCorrect'] ?? 0)),
            'testWrong' => max(0, (int)($stats['testWrong'] ?? 0)),
        ],
        'charSummaries' => nsp_morse_safe_chars($stats),
        'recent' => $safeRecent,
    ];
}
function nsp_morse_save_telemetry(): void {
    $len = (int)($_SERVER['CONTENT_LENGTH'] ?? 0);
    if ($len > NSP_MORSE_MAX_POST) nsp_json(['ok' => false, 'err' => 'payload too large'], 413);
    $raw = file_get_contents('php://input');
    $payload = json_decode((string)$raw, true);
    if (!is_array($payload)) nsp_json(['ok' => false, 'err' => 'invalid json'], 400);
    $visitor = nsp_morse_visitor_hash();
    $row = [
        'visitor' => $visitor,
        'updatedAt' => gmdate('c'),
        'uaHash' => nsp_morse_ua_hash(),
        'payload' => nsp_morse_safe_payload($payload),
    ];
    // Explicit: never store raw IP or UA string
    unset($row['ip'], $row['remote_addr'], $row['user_agent']);
    $result = nsp_morse_with_rows(function (array $rows) use ($visitor, $row) {
        $rows[$visitor] = $row; // ONE latest row per hash (non-accumulation)
        return ['__rows' => $rows, 'count' => count($rows)];
    });
    nsp_json(['ok' => true, 'visitorHash' => $visitor, 'storedVisitors' => $result['count'] ?? null]);
}
function nsp_morse_bucket_num(float $value, float $step): string {
    if ($value <= 0) return 'off';
    $rounded = round($value / $step) * $step;
    return number_format($rounded, $step < 1 ? 1 : 0, '.', '');
}
function nsp_morse_median(array $values): ?float {
    $values = array_values(array_filter($values, 'is_numeric'));
    $n = count($values);
    if ($n === 0) return null;
    sort($values, SORT_NUMERIC);
    $mid = intdiv($n, 2);
    return $n % 2 === 1 ? (float)$values[$mid] : (((float)$values[$mid - 1] + (float)$values[$mid]) / 2);
}
function nsp_morse_aggregate(array $rows): array {
    $summary = [
        'visitors' => count($rows),
        'heard' => 0,
        'testAttempts' => 0,
        'testCorrect' => 0,
        'masteredChars' => 0,
        'successWithinBudget' => 0,
        'conditions' => [],
        'note' => 'Anonymous aggregate by audio profile — learning-speed research, not identity.',
    ];
    foreach ($rows as $row) {
        $payload = is_array($row['payload'] ?? null) ? $row['payload'] : [];
        $recent = is_array($payload['recent'] ?? null) ? $payload['recent'] : [];
        $charSummaries = is_array($payload['charSummaries'] ?? null) ? $payload['charSummaries'] : [];
        $rowCond = nsp_morse_clean($payload['assignedCondition'] ?? '?', 8) ?: '?';
        if (!isset($summary['conditions'][$rowCond])) {
            $summary['conditions'][$rowCond] = [
                'heard' => 0, 'attempts' => 0, 'correct' => 0,
                'masteredChars' => 0, 'successWithinBudget' => 0,
                '_exposures' => [],
            ];
        }
        foreach ($recent as $e) {
            if (!is_array($e)) continue;
            $snap = is_array($e['snapshot'] ?? null) ? $e['snapshot'] : [];
            $cond = nsp_morse_clean($snap['assignedCondition'] ?? $rowCond, 8) ?: $rowCond;
            if (!isset($summary['conditions'][$cond])) {
                $summary['conditions'][$cond] = [
                    'heard' => 0, 'attempts' => 0, 'correct' => 0,
                    'masteredChars' => 0, 'successWithinBudget' => 0,
                    '_exposures' => [],
                ];
            }
            if (($e['event'] ?? '') === 'heard') {
                $summary['heard']++;
                $summary['conditions'][$cond]['heard']++;
            }
            if (($e['event'] ?? '') === 'test-answer') {
                $summary['testAttempts']++;
                $summary['conditions'][$cond]['attempts']++;
                if (!empty($e['correct'])) {
                    $summary['testCorrect']++;
                    $summary['conditions'][$cond]['correct']++;
                }
            }
        }
        foreach ($charSummaries as $c) {
            if (!is_array($c)) continue;
            $cond = nsp_morse_clean($c['masteryCondition'] ?? $rowCond, 8) ?: $rowCond;
            if (!isset($summary['conditions'][$cond])) {
                $summary['conditions'][$cond] = [
                    'heard' => 0, 'attempts' => 0, 'correct' => 0,
                    'masteredChars' => 0, 'successWithinBudget' => 0,
                    '_exposures' => [],
                ];
            }
            if (!empty($c['mastered'])) {
                $summary['masteredChars']++;
                $summary['conditions'][$cond]['masteredChars']++;
                $ex = (int)($c['exposuresToMastery'] ?? 0);
                if ($ex > 0) $summary['conditions'][$cond]['_exposures'][] = $ex;
            }
            if (!empty($c['successWithinBudget'])) {
                $summary['successWithinBudget']++;
                $summary['conditions'][$cond]['successWithinBudget']++;
            }
        }
    }
    $bestSpeed = null;
    foreach ($summary['conditions'] as $name => &$c) {
        $c['medianExposuresToMastery'] = nsp_morse_median($c['_exposures']);
        unset($c['_exposures']);
        if ($c['masteredChars'] >= 1 && $c['medianExposuresToMastery'] !== null) {
            if (!$bestSpeed || $c['medianExposuresToMastery'] < $bestSpeed['medianExposuresToMastery']) {
                $bestSpeed = ['condition' => $name, 'medianExposuresToMastery' => $c['medianExposuresToMastery']];
            }
        }
    }
    unset($c);
    $summary['bestSpeed'] = $bestSpeed;
    return $summary;
}
function nsp_morse_summary_api(): void {
    $agg = nsp_morse_with_rows(function (array $rows) {
        return nsp_morse_aggregate($rows);
    });
    nsp_json(['ok' => true, 'aggregate' => $agg]);
}
/** Per-visit Audio Profile A–E biasing field sweep bands (ref-v3). */
function nsp_morse_random_condition(array $summary = []): array {
    $base = [
        ['id' => 'A', 'spinMinHz' => 0.5, 'spinMaxHz' => 1.5, 'spreadMaxHz' => 12, 'lowOscMinHz' => 0.5, 'lowOscMaxHz' => 2.0, 'fieldVolume' => 4, 'movementDepth' => 55],
        ['id' => 'B', 'spinMinHz' => 1.5, 'spinMaxHz' => 2.5, 'spreadMaxHz' => 16, 'lowOscMinHz' => 1.0, 'lowOscMaxHz' => 3.0, 'fieldVolume' => 5, 'movementDepth' => 65],
        ['id' => 'C', 'spinMinHz' => 2.5, 'spinMaxHz' => 3.5, 'spreadMaxHz' => 20, 'lowOscMinHz' => 2.0, 'lowOscMaxHz' => 4.0, 'fieldVolume' => 5, 'movementDepth' => 70],
        ['id' => 'D', 'spinMinHz' => 0.5, 'spinMaxHz' => 4.0, 'spreadMaxHz' => 20, 'lowOscMinHz' => 0.5, 'lowOscMaxHz' => 4.0, 'fieldVolume' => 5, 'movementDepth' => 70],
        ['id' => 'E', 'spinMinHz' => 3.0, 'spinMaxHz' => 4.0, 'spreadMaxHz' => 20, 'lowOscMinHz' => 3.0, 'lowOscMaxHz' => 4.0, 'fieldVolume' => 6, 'movementDepth' => 75],
    ];
    $best = is_array($summary['bestSpeed'] ?? null) ? (string)($summary['bestSpeed']['condition'] ?? '') : '';
    $chosen = null;
    if ($best !== '' && random_int(1, 100) <= 55) {
        foreach ($base as $candidate) {
            if ($candidate['id'] === $best) { $chosen = $candidate; break; }
        }
    }
    if (!$chosen) $chosen = $base[random_int(0, count($base) - 1)];
    $chosen['spinMinHz'] = max(0.5, min(4.0, $chosen['spinMinHz'] + random_int(-10, 10) / 100));
    $chosen['spinMaxHz'] = max($chosen['spinMinHz'] + 0.2, min(4.0, $chosen['spinMaxHz'] + random_int(-10, 10) / 100));
    $chosen['spreadMaxHz'] = max(6, min(24, $chosen['spreadMaxHz'] + random_int(-10, 10) / 10));
    $chosen['lowOscMinHz'] = max(0.5, min(4.0, $chosen['lowOscMinHz'] + random_int(-10, 10) / 100));
    $chosen['lowOscMaxHz'] = max($chosen['lowOscMinHz'] + 0.2, min(4.0, $chosen['lowOscMaxHz'] + random_int(-10, 10) / 100));
    $chosen['fieldVolume'] = max(2, min(10, $chosen['fieldVolume'] + random_int(-1, 1)));
    $chosen['movementDepth'] = max(35, min(90, $chosen['movementDepth'] + random_int(-5, 5)));
    $tokenBody = implode('|', [
        $chosen['id'], $chosen['spinMinHz'], $chosen['spinMaxHz'], $chosen['spreadMaxHz'],
        $chosen['lowOscMinHz'], $chosen['lowOscMaxHz'], $chosen['fieldVolume'], $chosen['movementDepth'], gmdate('Y-m-d'),
    ]);
    $chosen['token'] = substr(hash_hmac('sha256', $tokenBody, nsp_morse_salt()), 0, 24);
    $chosen['label'] = 'Audio Profile ' . $chosen['id'];
    return $chosen;
}

function nsp_pass_set(string $pass): void {
    $pass = trim($pass);
    if (strlen($pass) < 8) nsp_json(['ok' => false, 'err' => 'admin pass min 8 chars'], 400);
    $h = password_hash($pass, PASSWORD_DEFAULT);
    if ($h === false) nsp_json(['ok' => false, 'err' => 'hash fail'], 500);
    file_put_contents(nsp_hash_file(), $h . "\n", LOCK_EX);
    @chmod(nsp_hash_file(), 0600);
    nsp_vault_write($pass);
}
function nsp_pass_is_set(): bool {
    return is_file(nsp_hash_file()) && trim((string)file_get_contents(nsp_hash_file())) !== '';
}
function nsp_ok(?string $pass): bool {
    if ($pass === null || $pass === '') return false;
    if (!nsp_pass_is_set()) return false;
    $h = trim((string)file_get_contents(nsp_hash_file()));
    return $h !== '' && password_verify(trim($pass), $h);
}
function nsp_require(): void {
    // POST body only — never accept admin_pass / seed from query (URL/access logs/Referer).
    $seed = (string)($_POST['seed'] ?? '');
    if ($seed !== '' && nsp_panel_seed_ok($seed)) {
        return;
    }
    $p = (string)($_POST['admin_pass'] ?? '');
    if (!nsp_ok($p)) nsp_json(['ok' => false, 'err' => 'admin auth'], 401);
}
function nsp_handle_admin_api(string $api): bool {
    if (!str_starts_with($api, 'admin_')) return false;
    nsp_ensure_site_seed();
    if ($api === 'admin_status') {
        $v = nsp_hub_variant();
        // Soft-verify V12: admin_pass_set + site only. No filesystem vault path to strangers.
        nsp_json(['ok' => true, 'admin_pass_set' => nsp_pass_is_set(), 'site' => $v, 'version' => $v]);
    }
    if ($api === 'admin_setup' && ($_SERVER['REQUEST_METHOD'] ?? '') === 'POST') {
        if (nsp_pass_is_set()) nsp_json(['ok' => false, 'err' => 'already set - use admin_login'], 400);
        // Seed exists at genesis — no unauthenticated land-grab of the legacy password door.
        $seed = (string)($_POST['seed'] ?? '');
        if ($seed === '' || !nsp_panel_seed_ok($seed)) {
            nsp_json(['ok' => false, 'err' => 'admin auth'], 401);
        }
        nsp_pass_set((string)($_POST['admin_pass'] ?? ''));
        // No absolute vault path on first-setup response (filesystem paths stay off unauth JSON).
        nsp_json(['ok' => true, 'msg' => 'hash+vault set (seed-proved)']);
    }
    if ($api === 'admin_login' && ($_SERVER['REQUEST_METHOD'] ?? '') === 'POST') {
        nsp_require();
        $v = nsp_hub_variant();
        nsp_json(['ok' => true, 'msg' => 'ok', 'site' => $v, 'vault_hint' => nsp_vault_dir(), 'version' => $v]);
    }
    if ($api === 'admin_change_pass' && ($_SERVER['REQUEST_METHOD'] ?? '') === 'POST') {
        nsp_require();
        nsp_pass_set((string)($_POST['new_pass'] ?? ''));
        nsp_json(['ok' => true, 'msg' => 'rotated']);
    }
    if ($api === 'admin_get_source' && ($_SERVER['REQUEST_METHOD'] ?? '') === 'POST') {
        nsp_require();
        $raw = (string)file_get_contents(__FILE__);
        nsp_json(['ok' => true, 'bytes' => strlen($raw), 'sha256' => hash('sha256', $raw), 'source' => $raw]);
    }
    if ($api === 'admin_put_source' && ($_SERVER['REQUEST_METHOD'] ?? '') === 'POST') {
        nsp_require();
        $src = (string)($_POST['source'] ?? '');
        if (strlen($src) < 100 || strpos($src, '<?php') === false) nsp_json(['ok' => false, 'err' => 'bad source'], 400);
        $bak = __FILE__ . '.bak.' . time();
        @copy(__FILE__, $bak);
        if (file_put_contents(__FILE__, $src, LOCK_EX) === false) nsp_json(['ok' => false, 'err' => 'write failed'], 500);
        nsp_json(['ok' => true, 'msg' => 'replaced', 'backup' => basename($bak), 'sha256' => hash('sha256', $src)]);
    }
    nsp_json(['ok' => false, 'err' => 'unknown admin api'], 404);
    return true;
}
function nsp_render_controlpanel(): void {
    header('Content-Type: text/html; charset=UTF-8');
    header('Cache-Control: no-store');
    $v = nsp_hub_variant();
    $site = nsp_hub_label() . ' MAP · AB hub';
    $h = htmlspecialchars($site);
    echo '<!DOCTYPE html><html data-ns-site="' . htmlspecialchars($v) . '" data-ns-ab="hub" lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width,initial-scale=1">';
    echo '<title>' . $h . ' Control</title><style>';
    echo 'body{margin:0;background:#0a0000;color:#fff;font-family:Arial,Helvetica,sans-serif;border-top:4px solid #c22}.wrap{max-width:960px;margin:0 auto;padding:16px}';
    echo 'input,textarea{width:100%;box-sizing:border-box;background:#0a0a0a;color:#fff;border:1px solid #fff;padding:10px;margin:6px 0;font-family:Consolas,monospace}';
    echo 'textarea{min-height:280px;font-size:11px}button{background:#411;color:#fff;border:1px solid #c22;padding:10px 14px;margin:4px 4px 4px 0;cursor:pointer;text-transform:uppercase}';
    echo 'button.d{background:#400}.msg{margin:8px 0;padding:10px;border:1px solid #444;font-size:13px}.ok{border-color:#2a6}.err{border-color:#a33}';
    echo '.warn{border-color:#a60;background:rgba(80,40,0,.35)}#panel{display:none}.ns-wipe-banner{margin:0 0 14px;padding:11px 12px;background:linear-gradient(105deg,rgba(58,24,0,.98),rgba(28,12,0,.92));border:1px solid #c70;border-left:4px solid #fc6;color:#ffd;font:11px/1.45 Arial,Helvetica,sans-serif;box-sizing:border-box;transition:opacity .85s ease,max-height .85s ease;max-height:140px;overflow:hidden}.ns-wipe-banner.fade{opacity:0;max-height:0;margin:0;padding:0 12px;pointer-events:none}.ns-wipe-banner a{color:#8cf}
</style>

</head><body><div class="wrap">';
    echo '<p class="dna" style="font-size:11px;letter-spacing:2px;color:#c22;margin:0 0 8px;text-transform:uppercase">DNA · MAP · AB hub · pinwheel · ' . htmlspecialchars($v) . '</p>';
    echo '<h1 style="letter-spacing:1px;text-transform:uppercase;color:#f88">' . $h . ' · Control Panel</h1>';
    echo '<p class="warn msg">Site-local renter key for THIS domain only (com/org/net AB triad shares UI code, not vaults). '
        . '<b>Paste this host\'s site wallet seed</b> (vault <code>SITE_WALLET_SEED.txt</code> / <code>data/site.seed</code>). '
        . 'UTTER control of THIS index.php. Not OS root. Independent vault per host. No visitor NSU on hub. '
        . 'Going-forward door is site seed; legacy admin password (if already set) is one-release migrate read only.</p>';
    echo '<div id="loginBox">';
    echo '<label for="seedIn">Site wallet seed (12 words)</label>';
    echo '<textarea id="seedIn" rows="3" placeholder="paste 12 words from vault SITE_WALLET_SEED.txt" autocomplete="off" style="width:100%;box-sizing:border-box;background:#0a0a0a;color:#fff;border:1px solid #fff;padding:10px;margin:6px 0;font-family:Consolas,monospace"></textarea>';
    echo '<button type="button" id="btnLogin">Unlock with site seed</button>';
    echo '<div id="loginMsg" class="msg" role="status" aria-live="polite"></div>';
    echo '<details id="legacyMigrate" style="display:none;margin-top:10px"><summary style="cursor:pointer;opacity:.85">Legacy password (one-release migrate only)</summary>';
    echo '<p style="font-size:12px;opacity:.8">Only if <code>data/admin.pass.hash</code> already exists from an older deploy. Not the product path.</p>';
    echo '<label for="pass">Legacy admin password</label>';
    echo '<input type="password" id="pass" autocomplete="current-password">';
    echo '<button type="button" id="btnLoginPass">Unlock with legacy pass</button></details>';
    echo '<p class="msg" style="font-size:12px;opacity:.85">Owner: seed auto-generated at first boot into <code>data/site.seed</code> + vault <code>SITE_WALLET_SEED.txt</code> (root pull). Paste seed → unlock. No password product path. No recovery desk. Hub is not a mint. Not a visitor account.</p></div>';
    echo '<div id="panel"><p>Vault: <span id="pVault">-</span></p>';
    echo '<details id="legacyRotate" style="display:none;margin:12px 0"><summary style="cursor:pointer;opacity:.85">Migrate: rotate legacy password (optional)</summary>';
    echo '<label for="newPass">New password</label><input type="password" id="newPass" placeholder="min 8" autocomplete="new-password"><button type="button" id="btnCh">Update</button><div id="chMsg" class="msg" role="status" aria-live="polite"></div></details>';
    echo '<h2>Source (utter control)</h2><button type="button" id="btnLoad">Load</button><button type="button" class="d" id="btnSave">Save</button>';
    echo '<div id="srcMsg" class="msg" role="status" aria-live="polite"></div><label for="src">index.php source</label><textarea id="src" spellcheck="false"></textarea>';
    echo '<p><a href="./" style="color:#8cf">← back</a></p></div></div><script>';
    echo '(function(){var P=null,S=null,passSet=false;function $(i){return document.getElementById(i)}function msg(id,ok,t){var e=$(id);e.className="msg "+(ok?"ok":"err");e.textContent=t}';
    echo 'function grabSeed(){S=($("seedIn").value||"").trim()||null;P=null}';
    echo 'function grabPass(){P=($("pass").value||"")||null;S=null;if(!P)P=null}';
    echo 'async function api(name,data){var b=new URLSearchParams();b.set("api",name);if(S)b.set("seed",S);if(P)b.set("admin_pass",P);if(data)Object.keys(data).forEach(function(k){b.set(k,data[k])});';
    echo 'return (await fetch("?api="+encodeURIComponent(name),{method:"POST",headers:{"Content-Type":"application/x-www-form-urlencoded"},body:b.toString()})).json()}';
    echo 'function after(r){$("panel").style.display="block";$("loginBox").style.display="none";$("pVault").textContent=r.vault_hint||"-";if(passSet)$("legacyRotate").style.display="block"}';
    echo '$("btnLogin").onclick=async function(){grabSeed();if(!S){msg("loginMsg",false,"Paste site seed");return}var r=await api("admin_login");msg("loginMsg",!!r.ok,r.ok?"ok":(r.err||"fail"));if(r.ok)after(r)};';
    echo '$("btnLoginPass").onclick=async function(){grabPass();if(!P){msg("loginMsg",false,"Enter legacy pass (migrate)");return}var r=await api("admin_login");msg("loginMsg",!!r.ok,r.ok?"ok":(r.err||"fail"));if(r.ok)after(r)};';
    echo '$("btnCh").onclick=async function(){var r=await api("admin_change_pass",{new_pass:$("newPass").value});msg("chMsg",!!r.ok,r.ok?r.msg:(r.err||"fail"));if(r.ok)P=$("newPass").value};';
    echo '$("btnLoad").onclick=async function(){var r=await api("admin_get_source");msg("srcMsg",!!r.ok,r.ok?("loaded "+r.bytes):(r.err||"fail"));if(r.ok)$("src").value=r.source};';
    echo '$("btnSave").onclick=async function(){if(!confirm("Replace index.php?"))return;var r=await api("admin_put_source",{source:$("src").value});msg("srcMsg",!!r.ok,r.ok?(r.msg+" bak="+r.backup):(r.err||"fail"))};';
    echo 'api("admin_status").then(function(r){if(r&&r.admin_pass_set){passSet=true;$("legacyMigrate").style.display="block"}}).catch(function(){});';
    echo '})();</script></body></html>';
    exit;
}

/**
 * In-file skill sketches: Morse (v1) + ASL text-only peer deck (same practice/test shell).
 * Two skills only — text letter hints for ASL, tones for Morse. No camera/video; no third skill.
 */
/**
 * In-file skill sketches: Morse (v2 competency engine) + ASL text-only peer deck.
 * Morse: clean 550 Hz tone SEPARATE from optional stereo field (profiles A–E).
 * Two skills only. No camera/video; no third skill. Hub DNA: free · no signup.
 */
function nsp_render_skill_sketch(string $skill): void {
    $skill = $skill === 'asl' ? 'asl' : 'morse';
    $v = nsp_hub_variant();
    $title = $skill === 'asl' ? 'ASL · skill deck' : 'Morse · competency sketch';
    header('Content-Type: text/html; charset=UTF-8');
    header('Cache-Control: no-store');
    $hubHome = './';
    $morseJson = json_encode([
        'A'=>'.-','B'=>'-...','C'=>'-.-.','D'=>'-..','E'=>'.','F'=>'..-.','G'=>'--.','H'=>'....',
        'I'=>'..','J'=>'.---','K'=>'-.-','L'=>'.-..','M'=>'--','N'=>'-.','O'=>'---','P'=>'.--.',
        'Q'=>'--.-','R'=>'.-.','S'=>'...','T'=>'-','U'=>'..-','V'=>'...-','W'=>'.--','X'=>'-..-',
        'Y'=>'-.--','Z'=>'--..','0'=>'-----','1'=>'.----','2'=>'..---','3'=>'...--','4'=>'....-',
        '5'=>'.....','6'=>'-....','7'=>'--...','8'=>'---..','9'=>'----.',
    ], JSON_UNESCAPED_SLASHES);
    $aslJson = json_encode([
        'A'=>'fist thumb side','B'=>'flat hand thumb in','C'=>'C shape','D'=>'index up rest touch',
        'E'=>'fist fingertips','F'=>'OK circle three up','G'=>'index+thumb side','H'=>'two fingers side',
        'I'=>'pinky up','J'=>'pinky draw J','K'=>'index mid V thumb','L'=>'L shape',
        'M'=>'three over thumb','N'=>'two over thumb','O'=>'O circle','P'=>'K pointing down',
        'Q'=>'G pointing down','R'=>'cross index mid','S'=>'fist thumb front','T'=>'thumb under index',
        'U'=>'two fingers up','V'=>'peace V','W'=>'three fingers','X'=>'hook index',
        'Y'=>'thumb+pinky','Z'=>'index draw Z',
    ], JSON_UNESCAPED_SLASHES);
    $spokenJson = json_encode([
        'A'=>'A','B'=>'B','C'=>'C','D'=>'D','E'=>'E','F'=>'F','G'=>'G','H'=>'H','I'=>'I','J'=>'J',
        'K'=>'K','L'=>'L','M'=>'M','N'=>'N','O'=>'O','P'=>'P','Q'=>'Q','R'=>'R','S'=>'S','T'=>'T',
        'U'=>'U','V'=>'V','W'=>'W','X'=>'X','Y'=>'Y','Z'=>'Z',
        '0'=>'zero','1'=>'one','2'=>'two','3'=>'three','4'=>'four','5'=>'five','6'=>'six','7'=>'seven','8'=>'eight','9'=>'nine',
    ], JSON_UNESCAPED_SLASHES);

    $serverBootstrap = null;
    if ($skill === 'morse') {
        /* Fail-open: soft row lock so unwritable data/ still serves the trainer. */
        $got = nsp_morse_with_rows(static function (array $rows) {
            return nsp_morse_aggregate($rows);
        }, false);
        $agg = is_array($got) ? $got : ['visitors' => 0, 'bestSpeed' => null];
        $cond = nsp_morse_random_condition($agg);
        $serverBootstrap = [
            'appVersion' => 'hub-morse-v2',
            'condition' => $cond,
            'aggregate' => [
                'visitors' => (int)($agg['visitors'] ?? 0),
                'bestSpeed' => $agg['bestSpeed'] ?? null,
            ],
            'mastery' => [
                'window' => NSP_MORSE_MASTERY_WINDOW,
                'required' => NSP_MORSE_MASTERY_REQUIRED,
                'maxMedianMs' => NSP_MORSE_MASTERY_MAX_MEDIAN_MS,
                'exposureBudget' => NSP_MORSE_MASTERY_EXPOSURE_BUDGET,
                'attemptBudget' => NSP_MORSE_MASTERY_ATTEMPT_BUDGET,
            ],
        ];
    }

    echo '<!DOCTYPE html><html lang="en" data-ns-site="' . htmlspecialchars($v) . '" data-ns-sketch="' . htmlspecialchars($skill) . '"><head><meta charset="UTF-8">';
    echo '<meta name="viewport" content="width=device-width,initial-scale=1">';
    echo '<title>' . htmlspecialchars($title) . '</title><style>';
    echo '*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:#000;color:#e8f4ff;font-family:system-ui,Segoe UI,Roboto,Arial,sans-serif}';
    echo 'main{display:grid;min-height:100svh;grid-template-rows:auto auto 1fr auto;gap:0}';
    echo 'header{display:flex;align-items:center;justify-content:space-between;padding:2% 3%;border-bottom:1px solid #0cf;background:#020a10}';
    echo 'header a{color:#8cf;text-decoration:none;font-weight:800;font-size:clamp(12px,2.8vmin,14px)}header .tag{font:700 11px/1 monospace;letter-spacing:.12em;color:#0cf;text-transform:uppercase}';
    echo '.stage{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:3% 3% 2%;border-bottom:1px solid #134;gap:1.2%}';
    echo '.char{font-size:clamp(2.2rem,12vmin,5rem);font-weight:950;letter-spacing:.04em;min-height:1.1em;text-shadow:0 0 24px rgba(0,200,255,.35)}';
    echo '.code-rail{min-height:1.3em;font:800 clamp(1.2rem,7vmin,2.4rem)/1.2 ui-monospace,Consolas,monospace;letter-spacing:.18em;color:#8ef;text-align:center;max-width:94%;word-break:break-all}';
    echo '.glyph-flash{display:flex;align-items:center;justify-content:center;min-height:14vmin;width:100%}';
    echo '.glyph-flash .g{font-size:clamp(3rem,18vmin,7rem);font-weight:950;color:#0cf;text-shadow:0 0 28px rgba(0,220,255,.55);opacity:.18;transform:scale(.86);transition:opacity .05s linear,transform .05s linear}';
    echo '.glyph-flash .g.on{opacity:1;transform:scale(1);color:#dff}';
    echo '.hint{font-size:clamp(13px,3.2vmin,18px);color:#9ab;text-align:center;max-width:36rem;min-height:2.2em;padding:0 3%}';
    echo '.status{font:600 12px/1.3 monospace;color:#6a8;margin-top:2px}';
    echo '.profile{font:700 12px/1.3 monospace;color:#0cf;margin-top:4px}';
    echo '.controls{padding:2% 3% 3%;display:grid;gap:2%}';
    echo '.pad{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(6px,1.5vmin,10px)}';
    echo '.pad button,.field-panel button{border:1px solid #0cf;background:#041018;color:#dff;font-weight:900;font-size:clamp(12px,2.8vmin,16px);border-radius:10px;cursor:pointer;padding:clamp(10px,2.4vmin,14px) 4px;min-height:44px}';
    echo '.pad button:active{transform:scale(.98)}.pad button:disabled{opacity:.4;cursor:not-allowed}';
    echo '.pad button.primary{background:#0a3040;border-color:#8cf}.pad button.go{background:#0a4020;border-color:#4f8}';
    echo '.answer-row{display:flex;gap:8px;align-items:center;justify-content:center;flex-wrap:wrap}';
    echo '.answer-row input{width:min(40%,12rem);padding:10px;border:1px solid #0cf;background:#020a10;color:#dff;font:800 18px monospace;border-radius:8px;text-align:center;text-transform:uppercase}';
    echo '.field-panel{border:1px solid #134;border-radius:12px;padding:2.5%;background:#030c12}';
    echo '.field-panel summary{cursor:pointer;font-weight:800;color:#8cf;list-style:none}';
    echo '.field-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(42%,1fr));gap:8px 12px;margin-top:10px;font-size:clamp(11px,2.6vmin,13px);color:#9ab}';
    echo '.field-grid label{display:flex;gap:8px;align-items:center;min-height:36px}';
    echo '.sliders{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:8px}';
    echo '.sliders label{display:flex;flex-direction:column;gap:4px;font-size:11px;color:#89a}';
    echo '.sliders input[type=range]{width:100%}';
    echo '.stats-bar{display:flex;flex-wrap:wrap;gap:8px 14px;justify-content:center;font:600 11px/1.3 monospace;color:#6a8;padding:0 2% 2%}';
    echo '.stats-bar b{color:#8cf}';
    echo '.mastery-spread{display:flex;flex-wrap:wrap;gap:4px;justify-content:center;padding:0 2% 2%;max-height:18vh;overflow:auto}';
    echo '.mastery-spread span{font:700 10px/1 monospace;padding:4px 6px;border:1px solid #234;border-radius:6px;color:#678}';
    echo '.mastery-spread span.ok{border-color:#0a6;color:#4f8;background:#031a10}';
    echo '.note{font-size:11px;color:#678;text-align:center;padding:0 3% 2%}';
    echo '.tele{font-size:10px;color:#456;text-align:center;padding:0 4% 3%;max-width:40rem;margin:0 auto;line-height:1.35}';
    echo '@media (prefers-reduced-motion:reduce){.glyph-flash .g{transition:none!important;transform:none!important}.glyph-flash .g.on{transform:none!important}}';
    echo '</style></head><body><main>';
    echo '<header><a href="' . htmlspecialchars($hubHome) . '">← MAP</a><span class="tag">sketch · ' . htmlspecialchars($skill) . ($skill === 'morse' ? ' · v2' : '') . '</span>';
    echo '<a href="?sketch=' . ($skill === 'morse' ? 'asl' : 'morse') . '">' . ($skill === 'morse' ? 'ASL →' : 'Morse →') . '</a></header>';
    echo '<div class="stage"><div class="char" id="char">·</div>';
    echo '<div class="glyph-flash" id="glyphFlash" aria-live="polite"><span class="g" id="glyph">·</span></div>';
    echo '<div class="code-rail" id="codeRail" aria-label="morse code live">—</div>';
    echo '<div class="hint" id="hint">' . ($skill === 'morse' ? 'Clean Morse tone · optional stereo field · practice or test' : 'Pick a stream · START to practice') . '</div>';
    echo '<div class="status" id="status">idle · no account · browser-local mastery</div>';
    if ($skill === 'morse') {
        echo '<div class="profile" id="profileBadge">Audio Profile</div>';
    }
    echo '</div><div class="controls">';
    echo '<div class="pad">';
    echo '<button type="button" id="btnStart" class="go">Start</button>';
    echo '<button type="button" id="btnStop" disabled>Stop</button>';
    echo '<button type="button" id="btnMode" class="primary">Mode: Practice</button>';
    echo '<button type="button" id="btnStream">Stream: Letters</button>';
    echo '<button type="button" id="btnAgain" disabled>Again</button>';
    echo '<button type="button" id="btnNext">Next random</button>';
    if ($skill === 'asl') {
        echo '<button type="button" id="btnShow">Show answer: OFF</button>';
    } else {
        echo '<button type="button" id="btnShow" class="primary">Reveal: auto</button>';
    }
    echo '<button type="button" id="btnBack" onclick="location.href=\'' . htmlspecialchars($hubHome) . '\'">Back to map</button>';
    echo '</div>';

    if ($skill === 'morse') {
        echo '<div class="answer-row" id="testBox" hidden><input id="answerInput" maxlength="1" autocomplete="off" inputmode="text" aria-label="type letter or digit" disabled><button type="button" id="submitBtn" disabled>Submit</button></div>';
        echo '<details class="field-panel" id="fieldPanel"><summary>Optional stereo field (headphones) · separate from Morse tone</summary>';
        echo '<div class="field-grid">';
        echo '<label><input type="checkbox" id="fieldEnabled"> Field on</label>';
        echo '<label><input type="checkbox" id="spinEnabled" checked> Spatial rotation</label>';
        echo '<label><input type="checkbox" id="spinSweepEnabled" checked> Rotation-rate sweep</label>';
        echo '<label><input type="checkbox" id="binauralEnabled" checked> Binaural spread</label>';
        echo '<label><input type="checkbox" id="spreadSweepEnabled" checked> Spread sweep</label>';
        echo '<label><input type="checkbox" id="lowOscillatorEnabled" checked> Low-osc nulls</label>';
        echo '<label><input type="checkbox" id="lowOscillatorSweepEnabled" checked> Low-osc sweep</label>';
        echo '<label><input type="checkbox" id="showImmediately" checked> Practice reveal early</label>';
        echo '</div><div class="sliders">';
        echo '<label>WPM <span id="speedOut">18</span><input type="range" id="speed" min="8" max="30" value="18"></label>';
        echo '<label>Tone vol % <span id="volumeOut">18</span><input type="range" id="volume" min="2" max="40" value="18"></label>';
        echo '<label>Field vol % <span id="fieldVolumeOut">5</span><input type="range" id="fieldVolume" min="0" max="12" value="5"></label>';
        echo '<label>Move depth % <span id="movementDepthOut">70</span><input type="range" id="movementDepth" min="20" max="95" value="70"></label>';
        echo '<label>Think ms <span id="thinkOut">700</span><input type="range" id="think" min="200" max="2000" step="50" value="700"></label>';
        echo '<label>Rest ms <span id="restOut">500</span><input type="range" id="rest" min="200" max="2000" step="50" value="500"></label>';
        echo '</div></details>';
        echo '<div class="stats-bar"><span>heard <b id="totalHeard">0</b></span><span>tests <b id="testAttempts">0</b></span><span>mastered <b id="masteredCount">0</b></span><span>agg visitors <b id="aggVisitors">0</b></span></div>';
        echo '<div class="mastery-spread" id="charSpread" aria-label="per-character mastery"></div>';
        echo '<p class="note">Morse tone is clean · centered ~550 Hz · field is optional experiment · headphones help for binaural</p>';
        echo '<p class="tele">Anonymous organism hook: one latest hashed row per visitor (HMAC of network+agent, never raw IP). Improves defaults by <em>learning speed</em>, not raw accuracy. No account · no recovery · no identity desk.</p>';
    } else {
        echo '<p class="note">Two skills only · ASL text hints · free · no signup · no camera</p>';
    }
    echo '</div></main><script>';
    echo 'const MORSE=' . $morseJson . ';const ASL=' . $aslJson . ';const SPOKEN=' . $spokenJson . ';';
    echo 'const SKILL=' . json_encode($skill) . ';';
    if ($serverBootstrap) {
        echo 'const SERVER=' . json_encode($serverBootstrap, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE) . ';';
    } else {
        echo 'const SERVER=null;';
    }
    echo <<<'JS'
const letters=Object.keys(MORSE);
const digits=letters.filter(c=>c>='0'&&c<='9');
const alpha=letters.filter(c=>c>='A'&&c<='Z');
const CHARS=letters.map(c=>c.toLowerCase());
const reduceMotion=window.matchMedia&&window.matchMedia('(prefers-reduced-motion: reduce)').matches;
const $=id=>document.getElementById(id);
const charEl=$('char'), hintEl=$('hint'), statusEl=$('status');
const glyphEl=$('glyph'), railEl=$('codeRail');
let mode='practice', stream='letters', running=false, showAns=false, token=0, lastItem='', lastCode='';
let actx=null, master=null, railBuf='';
let timeoutId=null, activeOscillators=[], pendingAnswerResolve=null, telemetryTimer=null;
let focus=null, focusTimer=null, focusStartMs=0, focusLastMs=0, spinPhase=0, spreadPhase=0, lowPhase=0;

function setStatus(t){statusEl.textContent=t;}
function clearGlyphStage(){
  if(glyphEl){ glyphEl.textContent='·'; glyphEl.classList.remove('on'); }
  if(railEl){ railBuf=''; railEl.textContent=SKILL==='morse'?'—':''; }
}
function flashGlyph(kind){
  if(!glyphEl) return;
  if(kind==='off'){ glyphEl.classList.remove('on'); return; }
  const g=kind==='dah'?'−':'·';
  glyphEl.textContent=g;
  glyphEl.classList.add('on');
  if(railEl&&SKILL==='morse'){ railBuf+=g; railEl.textContent=railBuf; }
}
function prettyCode(code){
  return String(code||'').replace(/\./g,'·').replace(/-/g,'−').replace(/ /g,' / ');
}
function sleep(ms, tok){
  return new Promise(r=>{
    timeoutId=setTimeout(()=>{ if(tok==null||tok===token) r(true); else r(false); }, ms);
  });
}

/* ===== ASL path (unchanged shell, light tone cue) ===== */
function ensureAudioSimple(){
  if(actx) return actx;
  const AC=window.AudioContext||window.webkitAudioContext;
  if(!AC) return null;
  actx=new AC();
  master=actx.createGain(); master.gain.value=0.14; master.connect(actx.destination);
  return actx;
}
function toneSimple(freq, dur){
  const ctx=ensureAudioSimple(); if(!ctx) return Promise.resolve();
  if(ctx.state==='suspended') ctx.resume();
  const t0=ctx.currentTime;
  const oL=ctx.createOscillator(), oR=ctx.createOscillator();
  const gL=ctx.createGain(), gR=ctx.createGain();
  oL.type=oR.type='sine';
  oL.frequency.value=freq; oR.frequency.value=freq+4.2;
  gL.gain.setValueAtTime(0.0001,t0); gL.gain.exponentialRampToValueAtTime(0.22,t0+0.008);
  gL.gain.exponentialRampToValueAtTime(0.0001,t0+Math.max(0.02,dur-0.01));
  gR.gain.setValueAtTime(0.0001,t0); gR.gain.exponentialRampToValueAtTime(0.22,t0+0.008);
  gR.gain.exponentialRampToValueAtTime(0.0001,t0+Math.max(0.02,dur-0.01));
  oL.connect(gL); oR.connect(gR);
  if(typeof ctx.createStereoPanner==='function'){
    const pL=ctx.createStereoPanner(), pR=ctx.createStereoPanner();
    pL.pan.value=-0.85; pR.pan.value=0.85;
    gL.connect(pL); gR.connect(pR); pL.connect(master); pR.connect(master);
  } else {
    const merge=ctx.createChannelMerger(2);
    gL.connect(merge,0,0); gR.connect(merge,0,1); merge.connect(master);
  }
  oL.start(t0); oR.start(t0); oL.stop(t0+dur+0.03); oR.stop(t0+dur+0.03);
  return new Promise(r=>setTimeout(r, dur*1000+20));
}

/* ===== MORSE-v2 engine (from operator ref-v2/v3, hub-compact) ===== */
const FOCUS_BASE_HZ=220;
const MORSE_HZ=550;
const SPIN_SWEEP_HZ=0.0125;
const STORAGE_KEY='nsHubMorseCompetencyV2';
let SPIN_MIN_HZ=0.5, SPIN_MAX_HZ=4.0, SPREAD_MAX_HZ=16, LOW_OSC_MIN_HZ=0.5, LOW_OSC_MAX_HZ=4.0;
let MASTERY_EXPOSURE_BUDGET=50, MASTERY_ATTEMPT_BUDGET=12, MASTERY_WINDOW=5, MASTERY_REQUIRED_CORRECT=4, MASTERY_MAX_MEDIAN_RESPONSE_MS=2500;

if(SERVER&&SERVER.condition){
  SPIN_MIN_HZ=Number(SERVER.condition.spinMinHz||0.5);
  SPIN_MAX_HZ=Number(SERVER.condition.spinMaxHz||4);
  SPREAD_MAX_HZ=Number(SERVER.condition.spreadMaxHz||16);
  LOW_OSC_MIN_HZ=Number(SERVER.condition.lowOscMinHz||0.5);
  LOW_OSC_MAX_HZ=Number(SERVER.condition.lowOscMaxHz||4);
}
if(SERVER&&SERVER.mastery){
  MASTERY_WINDOW=SERVER.mastery.window||5;
  MASTERY_REQUIRED_CORRECT=SERVER.mastery.required||4;
  MASTERY_MAX_MEDIAN_RESPONSE_MS=SERVER.mastery.maxMedianMs||2500;
  MASTERY_EXPOSURE_BUDGET=SERVER.mastery.exposureBudget||50;
  MASTERY_ATTEMPT_BUDGET=SERVER.mastery.attemptBudget||12;
}

function blankCharStats(){
  return {heard:0,practiceHeard:0,testPrompts:0,testAttempts:0,correct:0,wrong:0,firstHeardAt:null,lastHeardAt:null,recentTests:[],mastered:false,masteredAt:null,exposuresToMastery:null,attemptsToMastery:null,msToMastery:null,medianResponseMsAtMastery:null,successWithinBudget:false,masteryCondition:null};
}
function createStats(){
  const chars={};
  for(const char of CHARS) chars[char]=blankCharStats();
  return {
    version:2, createdAt:new Date().toISOString(), updatedAt:new Date().toISOString(),
    assignedCondition:SERVER&&SERVER.condition?SERVER.condition.id:'A',
    assignedToken:SERVER&&SERVER.condition?SERVER.condition.token:'',
    totalHeard:0, practiceHeard:0, testPrompts:0, testAttempts:0, testCorrect:0, testWrong:0,
    mastery:{masteredChars:0, masteries:[]}, chars, recent:[]
  };
}
function loadStats(){
  try{
    const raw=localStorage.getItem(STORAGE_KEY);
    if(!raw) return createStats();
    const parsed=JSON.parse(raw);
    if(!parsed||!parsed.chars) return createStats();
    for(const char of CHARS) parsed.chars[char]=Object.assign(blankCharStats(), parsed.chars[char]||{});
    parsed.recent=parsed.recent||[];
    parsed.mastery=parsed.mastery||{masteredChars:0,masteries:[]};
    if(SERVER&&SERVER.condition){
      parsed.assignedCondition=SERVER.condition.id;
      parsed.assignedToken=SERVER.condition.token;
    }
    return parsed;
  }catch(_){ return createStats(); }
}
let stats = SKILL==='morse' ? loadStats() : null;

function saveStats(){
  if(!stats) return;
  stats.updatedAt=new Date().toISOString();
  try{ localStorage.setItem(STORAGE_KEY, JSON.stringify(stats)); }catch(_){}
}
function queueTelemetry(eventName){
  if(SKILL!=='morse') return;
  clearTimeout(telemetryTimer);
  telemetryTimer=setTimeout(()=>sendTelemetry(eventName), 700);
}
async function sendTelemetry(eventName){
  if(SKILL!=='morse'||!stats) return;
  try{
    await fetch('?api=telemetry',{
      method:'POST',
      headers:{'Content-Type':'application/json'},
      body:JSON.stringify({
        clientVersion:SERVER?SERVER.appVersion:'hub-morse-v2',
        event:eventName||'update',
        assignedCondition:stats.assignedCondition,
        stats
      }),
      keepalive:true
    });
  }catch(_){}
}
function renderMastery(){
  if(!stats) return;
  const th=$('totalHeard'), ta=$('testAttempts'), mc=$('masteredCount'), av=$('aggVisitors'), spread=$('charSpread');
  if(th) th.textContent=stats.totalHeard;
  if(ta) ta.textContent=stats.testAttempts;
  stats.mastery.masteredChars=CHARS.filter(c=>stats.chars[c]&&stats.chars[c].mastered).length;
  if(mc) mc.textContent=stats.mastery.masteredChars;
  if(av&&SERVER) av.textContent=(SERVER.aggregate&&SERVER.aggregate.visitors)||0;
  if(spread){
    spread.innerHTML='';
    for(const char of CHARS){
      const c=stats.chars[char];
      const el=document.createElement('span');
      el.className=c.mastered?'ok':'';
      el.textContent=(/[a-z]/.test(char)?char.toUpperCase():char)+(c.mastered?'✓':'');
      el.title='heard '+c.heard+' · tests '+c.testAttempts+(c.mastered?' · mastered @'+c.exposuresToMastery+'x':'');
      spread.appendChild(el);
    }
  }
}
function lfo01(hz, elapsedSec, phaseOffset){
  return 0.5+0.5*Math.sin(2*Math.PI*hz*elapsedSec+(phaseOffset||0));
}
function lerp(a,b,t){ return a+(b-a)*t; }
function ensureAudio(){
  if(actx) return actx;
  const AC=window.AudioContext||window.webkitAudioContext;
  if(!AC) return null;
  actx=new AC();
  return actx;
}
function stopActiveOscillators(){
  for(const osc of activeOscillators){ try{osc.stop();}catch(_){} }
  activeOscillators=[];
}
function currentSnapshot(){
  if(SKILL!=='morse') return {};
  const fieldEnabled=$('fieldEnabled');
  const spinEnabled=$('spinEnabled');
  const spinSweepEnabled=$('spinSweepEnabled');
  const binauralEnabled=$('binauralEnabled');
  const spreadSweepEnabled=$('spreadSweepEnabled');
  const lowOscillatorEnabled=$('lowOscillatorEnabled');
  const lowOscillatorSweepEnabled=$('lowOscillatorSweepEnabled');
  const fieldVolume=$('fieldVolume');
  const movementDepth=$('movementDepth');
  const speed=$('speed');
  const elapsedSec=focusStartMs?(performance.now()-focusStartMs)/1000:0;
  const spinOn=fieldEnabled&&fieldEnabled.checked&&spinEnabled&&spinEnabled.checked;
  const spreadOn=fieldEnabled&&fieldEnabled.checked&&binauralEnabled&&binauralEnabled.checked;
  const lowOn=fieldEnabled&&fieldEnabled.checked&&lowOscillatorEnabled&&lowOscillatorEnabled.checked;
  const spinHz=spinOn?(spinSweepEnabled&&spinSweepEnabled.checked?lerp(SPIN_MIN_HZ,SPIN_MAX_HZ,lfo01(SPIN_SWEEP_HZ,elapsedSec)):3.2):0;
  let spreadHz=0, lowOscHz=0;
  if(spreadOn){
    if(lowOn){
      lowOscHz=lowOscillatorSweepEnabled&&lowOscillatorSweepEnabled.checked
        ? lerp(LOW_OSC_MIN_HZ, LOW_OSC_MAX_HZ, lfo01(0.02, elapsedSec, 1.1))
        : (LOW_OSC_MIN_HZ+LOW_OSC_MAX_HZ)/2;
      const base=spreadSweepEnabled&&spreadSweepEnabled.checked?SPREAD_MAX_HZ*Math.sin(spreadPhase||0):SPREAD_MAX_HZ;
      spreadHz=base*Math.sin(lowPhase||0); // null crossings
    } else {
      spreadHz=spreadSweepEnabled&&spreadSweepEnabled.checked?Math.abs(SPREAD_MAX_HZ*Math.sin(spreadPhase||0)):SPREAD_MAX_HZ;
    }
  }
  return {
    assignedCondition:SERVER&&SERVER.condition?SERVER.condition.id:'A',
    morseWpm:speed?Number(speed.value):18,
    spinEnabled:!!spinOn,
    spinSweepEnabled:!!(spinSweepEnabled&&spinSweepEnabled.checked),
    binauralEnabled:!!spreadOn,
    spreadSweepEnabled:!!(spreadSweepEnabled&&spreadSweepEnabled.checked),
    lowOscillatorEnabled:!!lowOn,
    lowOscillatorSweepEnabled:!!(lowOscillatorSweepEnabled&&lowOscillatorSweepEnabled.checked),
    spinHz:Number(spinHz.toFixed(3)),
    spreadHz:Number(Math.abs(spreadHz).toFixed(3)),
    lowOscHz:Number(lowOscHz.toFixed(3)),
    fieldVolume:fieldVolume?Number(fieldVolume.value):0,
    movementDepth:movementDepth?Number(movementDepth.value):0
  };
}
function median(values){
  const nums=values.filter(v=>Number.isFinite(v)).sort((a,b)=>a-b);
  if(!nums.length) return null;
  const mid=Math.floor(nums.length/2);
  return nums.length%2?nums[mid]:(nums[mid-1]+nums[mid])/2;
}
function evaluateMastery(char, snapshot){
  const c=stats.chars[char];
  if(!c||c.mastered) return;
  const window=c.recentTests.slice(-MASTERY_WINDOW);
  if(window.length<MASTERY_WINDOW) return;
  const correctCount=window.filter(t=>t.correct).length;
  const medianResponse=median(window.map(t=>Number(t.responseMs||0)));
  if(c.practiceHeard<3) return;
  if(correctCount<MASTERY_REQUIRED_CORRECT) return;
  if(medianResponse===null||medianResponse>MASTERY_MAX_MEDIAN_RESPONSE_MS) return;
  const now=new Date();
  const first=c.firstHeardAt?new Date(c.firstHeardAt):now;
  const msToMastery=Math.max(0, now.getTime()-first.getTime());
  const successWithinBudget=c.heard<=MASTERY_EXPOSURE_BUDGET&&c.testAttempts<=MASTERY_ATTEMPT_BUDGET;
  c.mastered=true; c.masteredAt=now.toISOString();
  c.exposuresToMastery=c.heard; c.attemptsToMastery=c.testAttempts;
  c.msToMastery=msToMastery; c.medianResponseMsAtMastery=Math.round(medianResponse);
  c.successWithinBudget=successWithinBudget; c.masteryCondition=snapshot.assignedCondition;
  stats.mastery.masteredChars=CHARS.filter(k=>stats.chars[k]&&stats.chars[k].mastered).length;
  stats.mastery.masteries.push({char, profile_id:snapshot.assignedCondition, exposures_to_mastery:c.exposuresToMastery});
  stats.recent.push({at:c.masteredAt,event:'mastery',char,snapshot,exposuresToMastery:c.exposuresToMastery,attemptsToMastery:c.attemptsToMastery,msToMastery:c.msToMastery,medianResponseMsAtMastery:c.medianResponseMsAtMastery,successWithinBudget});
}
function recordExposure(char, trialMode, snapshot){
  const now=new Date().toISOString();
  const c=stats.chars[char];
  stats.totalHeard++; c.heard++; c.firstHeardAt=c.firstHeardAt||now; c.lastHeardAt=now;
  if(trialMode==='practice'){ stats.practiceHeard++; c.practiceHeard++; }
  else { stats.testPrompts++; c.testPrompts++; }
  stats.recent.push({at:now,event:'heard',mode:trialMode,char,snapshot});
  if(stats.recent.length>800) stats.recent=stats.recent.slice(-800);
  saveStats(); renderMastery(); queueTelemetry('heard');
}
function recordTestAnswer(char, answer, snapshot, responseMs){
  const normalized=String(answer||'').trim().toLowerCase()[0]||'';
  const correct=normalized===char;
  const c=stats.chars[char];
  stats.testAttempts++; c.testAttempts++;
  if(correct){ stats.testCorrect++; c.correct++; } else { stats.testWrong++; c.wrong++; }
  c.recentTests=c.recentTests||[];
  c.recentTests.push({at:new Date().toISOString(),correct,responseMs});
  if(c.recentTests.length>20) c.recentTests=c.recentTests.slice(-20);
  stats.recent.push({at:new Date().toISOString(),event:'test-answer',char,answer:normalized,correct,responseMs,snapshot});
  evaluateMastery(char, snapshot);
  if(stats.recent.length>800) stats.recent=stats.recent.slice(-800);
  saveStats(); renderMastery(); queueTelemetry('test-answer');
  return correct;
}

/** Clean centered Morse tone — NOT spatialized (operator law). Live ·/− flash synced. */
async function playMorseClean(code, tok){
  const ctx=ensureAudio(); if(!ctx) return false;
  if(ctx.state==='suspended') await ctx.resume();
  const speedEl=$('speed');
  const volEl=$('volume');
  const unitSec=(1200/(speedEl?Number(speedEl.value):18))/1000;
  const level=Math.max(0.0001, (volEl?Number(volEl.value):18)/100);
  const attack=Math.min(0.005, unitSec/4);
  const release=Math.min(0.008, unitSec/3);
  let t=ctx.currentTime+0.03;
  stopActiveOscillators();
  clearGlyphStage();
  for(const symbol of String(code||'')){
    if(tok!==token||!running) return false;
    if(symbol!=='.'&&symbol!=='-') continue;
    const toneDuration=(symbol==='.'?1:3)*unitSec;
    flashGlyph(symbol==='.'?'dit':'dah');
    const osc=ctx.createOscillator();
    const gain=ctx.createGain();
    osc.type='sine';
    osc.frequency.setValueAtTime(MORSE_HZ, t);
    gain.gain.setValueAtTime(0.0001, t);
    gain.gain.linearRampToValueAtTime(level, t+attack);
    gain.gain.setValueAtTime(level, Math.max(t+attack, t+toneDuration-release));
    gain.gain.linearRampToValueAtTime(0.0001, t+toneDuration);
    osc.connect(gain); gain.connect(ctx.destination);
    osc.start(t); osc.stop(t+toneDuration+0.02);
    activeOscillators.push(osc);
    const waitMs=Math.max(0, (t+toneDuration-ctx.currentTime)*1000);
    await sleep(waitMs+8, tok);
    flashGlyph('off');
    t=ctx.currentTime+unitSec;
    if(!await sleep(unitSec*1000*0.85, tok)) return false;
  }
  activeOscillators=[];
  return await sleep(unitSec*2*1000, tok);
}

function startFocusLayer(){
  const fieldEnabled=$('fieldEnabled');
  if(!fieldEnabled||!fieldEnabled.checked||focus) return;
  const ctx=ensureAudio(); if(!ctx) return;
  if(ctx.state==='suspended') ctx.resume();
  const oscLeft=ctx.createOscillator(), oscRight=ctx.createOscillator();
  const gainLeft=ctx.createGain(), gainRight=ctx.createGain();
  const merger=ctx.createChannelMerger(2);
  oscLeft.type=oscRight.type='sine';
  oscLeft.frequency.setValueAtTime(FOCUS_BASE_HZ, ctx.currentTime);
  oscRight.frequency.setValueAtTime(FOCUS_BASE_HZ, ctx.currentTime);
  gainLeft.gain.setValueAtTime(0.0001, ctx.currentTime);
  gainRight.gain.setValueAtTime(0.0001, ctx.currentTime);
  oscLeft.connect(gainLeft); oscRight.connect(gainRight);
  gainLeft.connect(merger,0,0); gainRight.connect(merger,0,1); merger.connect(ctx.destination);
  oscLeft.start(); oscRight.start();
  focus={oscLeft,oscRight,gainLeft,gainRight,merger};
  focusStartMs=performance.now(); focusLastMs=focusStartMs;
  spinPhase=0; spreadPhase=0; lowPhase=0;
  updateFocusField();
  focusTimer=setInterval(updateFocusField, 30);
}
function updateFocusField(){
  if(!focus||!actx) return;
  const fieldEnabled=$('fieldEnabled');
  if(fieldEnabled&&!fieldEnabled.checked) return;
  const nowMs=performance.now();
  const dt=Math.max(0.001, Math.min(0.1, (nowMs-focusLastMs)/1000));
  const elapsedSec=(nowMs-focusStartMs)/1000;
  focusLastMs=nowMs;
  const ctxNow=actx.currentTime;
  const spinEnabled=$('spinEnabled');
  const spinSweepEnabled=$('spinSweepEnabled');
  const binauralEnabled=$('binauralEnabled');
  const spreadSweepEnabled=$('spreadSweepEnabled');
  const lowOscillatorEnabled=$('lowOscillatorEnabled');
  const lowOscillatorSweepEnabled=$('lowOscillatorSweepEnabled');
  const fieldVolume=$('fieldVolume');
  const movementDepth=$('movementDepth');
  const baseLevel=(fieldVolume?Number(fieldVolume.value):5)/100;
  const depth=(movementDepth?Number(movementDepth.value):70)/100;
  const spinHz=spinSweepEnabled&&spinSweepEnabled.checked?lerp(SPIN_MIN_HZ,SPIN_MAX_HZ,lfo01(SPIN_SWEEP_HZ,elapsedSec)):3.2;
  if(spinEnabled&&spinEnabled.checked) spinPhase+=2*Math.PI*spinHz*dt;
  if(binauralEnabled&&binauralEnabled.checked) spreadPhase+=2*Math.PI*spinHz*dt;
  let lowOscHz=0;
  if(lowOscillatorEnabled&&lowOscillatorEnabled.checked){
    lowOscHz=lowOscillatorSweepEnabled&&lowOscillatorSweepEnabled.checked
      ? lerp(LOW_OSC_MIN_HZ, LOW_OSC_MAX_HZ, lfo01(0.02, elapsedSec, 1.1))
      : (LOW_OSC_MIN_HZ+LOW_OSC_MAX_HZ)/2;
    lowPhase+=2*Math.PI*lowOscHz*dt;
  }
  let activeSpreadHz=0;
  if(binauralEnabled&&binauralEnabled.checked){
    const base=spreadSweepEnabled&&spreadSweepEnabled.checked?SPREAD_MAX_HZ*Math.sin(spreadPhase):SPREAD_MAX_HZ;
    activeSpreadHz=(lowOscillatorEnabled&&lowOscillatorEnabled.checked)? base*Math.sin(lowPhase) : base;
  }
  const leftHz=FOCUS_BASE_HZ-activeSpreadHz/2;
  const rightHz=FOCUS_BASE_HZ+activeSpreadHz/2;
  const pan=spinEnabled&&spinEnabled.checked?0.5+0.5*Math.sin(spinPhase):0.5;
  const leftPan=Math.sqrt(Math.max(0,1-pan));
  const rightPan=Math.sqrt(Math.max(0,pan));
  const floor=1-depth;
  const pulse=0.65+0.35*(0.5+0.5*Math.sin(spreadPhase||0));
  const leftLevel=baseLevel*pulse*(floor+depth*leftPan);
  const rightLevel=baseLevel*pulse*(floor+depth*rightPan);
  focus.oscLeft.frequency.setTargetAtTime(leftHz, ctxNow, 0.025);
  focus.oscRight.frequency.setTargetAtTime(rightHz, ctxNow, 0.025);
  focus.gainLeft.gain.setTargetAtTime(Math.max(0.0001,leftLevel), ctxNow, 0.04);
  focus.gainRight.gain.setTargetAtTime(Math.max(0.0001,rightLevel), ctxNow, 0.04);
}
function stopFocusLayer(){
  if(focusTimer){ clearInterval(focusTimer); focusTimer=null; }
  if(!focus) return;
  try{ focus.oscLeft.stop(); focus.oscRight.stop(); }catch(_){}
  try{ focus.merger.disconnect(); }catch(_){}
  focus=null;
}
function speak(text){
  return new Promise(resolve=>{
    if(!('speechSynthesis' in window)){ resolve(); return; }
    try{ speechSynthesis.cancel(); }catch(_){}
    const u=new SpeechSynthesisUtterance(text);
    u.lang='en-US'; u.rate=1.15; u.onend=resolve; u.onerror=resolve;
    speechSynthesis.speak(u);
  });
}
function pickItem(){
  let pool=alpha;
  if(stream==='digits') pool=digits;
  else if(stream==='mixed') pool=letters;
  else if(stream==='words'){
    const w=['SOS','HELLO','RADIO','PEER','FREE','TRADE','SIGNAL','MIRROR','SKILL','TRAIN'];
    return w[Math.floor(Math.random()*w.length)];
  }
  return pool[Math.floor(Math.random()*pool.length)];
}
function codeFor(item){
  if(SKILL==='asl'){
    if(item.length>1) return item.split('').map(c=>ASL[c]||c).join(' · ');
    return ASL[item]||'—';
  }
  if(item.length>1) return item.split('').map(c=>MORSE[c]||'').join(' / ');
  return MORSE[item]||'';
}
function reveal(item, code){
  charEl.textContent=item;
  if(railEl&&SKILL==='morse') railEl.textContent=prettyCode(code);
  if(SKILL==='morse') hintEl.textContent=item+' → '+prettyCode(code);
  else hintEl.textContent=item+' → '+code;
}
function hideAnswer(){
  charEl.textContent='?';
  if(railEl&&SKILL==='morse') railEl.textContent='—';
}
function waitForAnswer(){
  const started=performance.now();
  const input=$('answerInput'), btn=$('submitBtn'), box=$('testBox');
  if(box) box.hidden=false;
  return new Promise(resolve=>{
    pendingAnswerResolve=answer=>{
      resolve({answer, responseMs:Math.round(performance.now()-started)});
    };
    if(input){ input.value=''; input.disabled=false; input.focus(); }
    if(btn) btn.disabled=false;
  });
}
function submitAnswer(){
  if(!pendingAnswerResolve) return;
  const input=$('answerInput'), btn=$('submitBtn');
  const answer=input?input.value:'';
  if(input) input.disabled=true;
  if(btn) btn.disabled=true;
  const resolve=pendingAnswerResolve; pendingAnswerResolve=null;
  resolve(answer);
}

async function runLoopMorse(){
  const tok=++token; running=true;
  $('btnStart').disabled=true; $('btnStop').disabled=false; $('btnAgain').disabled=true;
  $('btnMode').disabled=true;
  setStatus('running · '+mode+' · clean 550Hz'+( $('fieldEnabled')&&$('fieldEnabled').checked?' · field on':''));
  if($('fieldEnabled')&&$('fieldEnabled').checked) startFocusLayer();
  try{
    while(running&&tok===token){
      const item=pickItem();
      lastItem=item; lastCode=codeFor(item);
      const itemKey=item.length===1?item.toLowerCase():null;
      const snapshot=currentSnapshot();
      if(mode==='practice'){
        const showEarly=$('showImmediately')&&$('showImmediately').checked;
        if(showEarly) reveal(item, lastCode); else hideAnswer();
        hintEl.textContent=showEarly?(item+' · listen'):'watch ·/− · hear clean tone · then recall';
        if(itemKey) recordExposure(itemKey,'practice',snapshot);
        if(item.length>1){
          for(const c of item){
            if(!running||tok!==token) return;
            if(!await playMorseClean(MORSE[c]||'', tok)) return;
            if(!await sleep(220,tok)) return;
          }
        } else {
          if(!await playMorseClean(lastCode, tok)) return;
        }
        if(!running||tok!==token) return;
        setStatus('think');
        await sleep(Number(($('think')&&$('think').value)||700), tok);
        if(!running||tok!==token) return;
        reveal(item, lastCode);
        await speak(SPOKEN[item]||item);
        setStatus('rest');
        await sleep(Number(($('rest')&&$('rest').value)||500), tok);
      } else {
        hideAnswer();
        hintEl.textContent='type the character · watch live ·/−';
        const box=$('testBox'); if(box) box.hidden=false;
        if(itemKey) recordExposure(itemKey,'test',snapshot);
        if(item.length>1){
          // tests prefer single chars
          continue;
        }
        if(!await playMorseClean(lastCode, tok)) return;
        if(!running||tok!==token) return;
        setStatus('type answer');
        const result=await waitForAnswer();
        if(!running||result.answer===null) break;
        const correct=recordTestAnswer(itemKey, result.answer, snapshot, result.responseMs);
        setStatus(correct?'correct':'missed');
        reveal(item, lastCode);
        await speak(SPOKEN[item]||item);
        await sleep(Number(($('rest')&&$('rest').value)||500), tok);
      }
    }
  } finally {
    if(running&&tok===token) stopAll();
  }
}

async function runLoopAsl(){
  const tok=++token; running=true;
  $('btnStart').disabled=true; $('btnStop').disabled=false; $('btnAgain').disabled=true;
  setStatus('running · '+mode+' · asl');
  try{
    while(running&&tok===token){
      const item=pickItem(); lastItem=item; lastCode=codeFor(item);
      if(mode==='practice'){
        charEl.textContent=item;
        hintEl.textContent=showAns?(item+' → '+lastCode):'form the sign · listen for cue';
        clearGlyphStage();
        await toneSimple(480, 0.12); await sleep(900, tok);
        if(showAns) hintEl.textContent=item+' → '+lastCode;
        await sleep(stream==='words'?1100:700, tok);
      } else {
        charEl.textContent='?';
        hintEl.textContent='which letter/sign? (show answer to check)';
        await toneSimple(480, 0.12);
        await sleep(1400, tok);
        if(showAns){ charEl.textContent=item; hintEl.textContent=item+' → '+lastCode; await sleep(900, tok); }
      }
    }
  } finally {
    if(running&&tok===token) stopAll();
  }
}

function stopAll(){
  running=false; token++;
  clearTimeout(timeoutId);
  stopActiveOscillators();
  stopFocusLayer();
  if(pendingAnswerResolve){ const r=pendingAnswerResolve; pendingAnswerResolve=null; r(null); }
  if('speechSynthesis' in window) try{ speechSynthesis.cancel(); }catch(_){}
  $('btnStart').disabled=false; $('btnStop').disabled=true; $('btnAgain').disabled=!lastItem;
  if($('btnMode')) $('btnMode').disabled=false;
  if($('answerInput')) $('answerInput').disabled=true;
  if($('submitBtn')) $('submitBtn').disabled=true;
  setStatus('stopped · last '+(lastItem||'—'));
  if(glyphEl) glyphEl.classList.remove('on');
  if(SKILL==='morse') sendTelemetry('stop');
  renderIdle();
}
function renderIdle(){
  charEl.textContent= lastItem || (SKILL==='asl'?'🤟':'·');
  if(glyphEl){ glyphEl.textContent='·'; glyphEl.classList.remove('on'); }
  if(railEl){
    if(SKILL==='morse'&&lastCode) railEl.textContent=prettyCode(lastCode);
    else if(SKILL==='asl') railEl.textContent='';
    else railEl.textContent='—';
  }
  if(SKILL==='asl') hintEl.textContent='ASL · text letter hints · practice or test · no camera';
  else hintEl.textContent='Morse · clean 550 Hz + optional stereo field · practice or test';
}

function updateSliderLabels(){
  const map=[['speed','speedOut',' WPM'],['volume','volumeOut','%'],['fieldVolume','fieldVolumeOut','%'],['movementDepth','movementDepthOut','%'],['think','thinkOut',' ms'],['rest','restOut',' ms']];
  for(const [id,out,suf] of map){
    const el=$(id), o=$(out);
    if(el&&o) o.textContent=el.value+suf;
  }
  updateFocusField();
}

function bindMorseUi(){
  if(SKILL!=='morse') return;
  const pb=$('profileBadge');
  if(pb&&SERVER&&SERVER.condition) pb.textContent=(SERVER.condition.label||('Audio Profile '+SERVER.condition.id))+' · token '+(SERVER.condition.token||'').slice(0,8);
  if(SERVER&&SERVER.condition){
    if($('fieldVolume')) $('fieldVolume').value=String(SERVER.condition.fieldVolume??5);
    if($('movementDepth')) $('movementDepth').value=String(SERVER.condition.movementDepth??70);
  }
  for(const id of ['speed','think','rest','volume','fieldVolume','movementDepth']){
    const el=$(id); if(el) el.addEventListener('input', ()=>{ updateSliderLabels(); queueTelemetry('settings'); });
  }
  for(const id of ['fieldEnabled','spinEnabled','spinSweepEnabled','binauralEnabled','spreadSweepEnabled','lowOscillatorEnabled','lowOscillatorSweepEnabled','showImmediately']){
    const el=$(id);
    if(!el) continue;
    el.addEventListener('change', ()=>{
      if($('fieldEnabled')&&$('fieldEnabled').checked&&running) startFocusLayer();
      if($('fieldEnabled')&&!$('fieldEnabled').checked) stopFocusLayer();
      updateFocusField();
      queueTelemetry('dimension-toggle');
    });
  }
  if($('submitBtn')) $('submitBtn').onclick=submitAnswer;
  if($('answerInput')) $('answerInput').addEventListener('keydown', e=>{ if(e.key==='Enter'){ e.preventDefault(); submitAnswer(); }});
  updateSliderLabels();
  renderMastery();
  saveStats();
  sendTelemetry('pageview');
}

$('btnStart').onclick=()=>{
  if(SKILL==='morse'){ ensureAudio(); runLoopMorse(); }
  else { ensureAudioSimple(); runLoopAsl(); }
};
$('btnStop').onclick=()=>stopAll();
$('btnAgain').onclick=()=>{
  if(!lastItem) return;
  running=true; $('btnStart').disabled=true; $('btnStop').disabled=false;
  const tok=++token;
  (async()=>{
    setStatus('again · '+lastItem);
    if(SKILL==='morse'){
      if($('fieldEnabled')&&$('fieldEnabled').checked) startFocusLayer();
      if(lastItem.length>1){
        for(const c of lastItem){ if(!await playMorseClean(MORSE[c]||'', tok)) break; }
      } else await playMorseClean(lastCode, tok);
    } else await toneSimple(480,0.12);
    stopAll();
  })();
};
$('btnNext').onclick=()=>{
  const streams=['letters','digits','mixed','words'];
  stream=streams[Math.floor(Math.random()*streams.length)];
  $('btnStream').textContent='Stream: '+stream;
  if(!running){ if(SKILL==='morse'){ ensureAudio(); runLoopMorse(); } else { ensureAudioSimple(); runLoopAsl(); } }
};
$('btnMode').onclick=()=>{
  if(running) return;
  mode=mode==='practice'?'test':'practice';
  $('btnMode').textContent='Mode: '+(mode==='practice'?'Practice':'Test');
  const box=$('testBox');
  if(box) box.hidden=mode!=='test';
};
$('btnStream').onclick=()=>{
  const streams=['letters','digits','mixed','words'];
  stream=streams[(streams.indexOf(stream)+1)%streams.length];
  $('btnStream').textContent='Stream: '+stream;
};
if($('btnShow')){
  $('btnShow').onclick=()=>{
    if(SKILL==='asl'){
      showAns=!showAns;
      $('btnShow').textContent='Show answer: '+(showAns?'ON':'OFF');
      renderIdle();
    } else {
      const si=$('showImmediately');
      if(si){ si.checked=!si.checked; $('btnShow').textContent=si.checked?'Reveal: auto':'Reveal: after'; }
    }
  };
}
document.addEventListener('keydown',e=>{
  if(e.code==='Space'&&e.target===document.body){
    e.preventDefault();
    if(running) stopAll();
    else { if(SKILL==='morse'){ ensureAudio(); runLoopMorse(); } else { ensureAudioSimple(); runLoopAsl(); } }
  }
});
void reduceMotion;
bindMorseUi();
renderIdle();
JS;
    echo '</script></body></html>';
}

if (isset($_GET['src']) || isset($_GET['download']) || (isset($_GET['api']) && $_GET['api'] === 'src')) {
    $raw = (string)file_get_contents(__FILE__);
    header('Content-Type: text/plain; charset=UTF-8');
    header('X-Content-Type-Options: nosniff');
    header('X-NS-Sha256: ' . hash('sha256', $raw));
    if (isset($_GET['download'])) {
        header('Content-Disposition: attachment; filename="nosignup-' . nsp_hub_variant() . '.php"');
    }
    echo $raw;
    exit;
}

/* Site seed genesis BEFORE any admin API / controlpanel (no land-grab window). */
$api = (string)($_GET['api'] ?? $_POST['api'] ?? '');
/* MORSE-v2: organism research hooks (hashed anon; no accounts) */
if ($api === 'telemetry' && ($_SERVER['REQUEST_METHOD'] ?? '') === 'POST') {
    nsp_morse_save_telemetry();
}
if ($api === 'summary') {
    nsp_morse_summary_api();
}
/* WIRING-PARITY: public selfhash (trade-shape; no auth) */
if ($api === 'selfhash') {
    nsp_json([
        'ok' => true,
        'version' => 'hub-sketch-1',
        'sha256' => @hash_file('sha256', __FILE__) ?: null,
        'file' => basename(__FILE__),
    ]);
}
$wantPanel = isset($_GET['controlpanel']) || (isset($_SERVER['REQUEST_URI']) && preg_match('#/controlpanel/?(\?|$)#', (string)$_SERVER['REQUEST_URI']));
if (($api !== '' && str_starts_with($api, 'admin_')) || ($wantPanel && $api === '')) {
    nsp_ensure_site_seed();
}
if ($api !== '' && str_starts_with($api, 'admin_')) { nsp_handle_admin_api($api); }
if ($wantPanel && $api === '') { nsp_render_controlpanel(); }

/* In-file sketch / custom-site memory — served from this PHP */
$sketch = strtolower(preg_replace('/[^a-z0-9_-]/', '', (string)($_GET['sketch'] ?? '')) ?? '');
if ($sketch === 'morse' || $sketch === 'asl' || $sketch === 'train') {
    nsp_render_skill_sketch($sketch === 'train' ? 'morse' : $sketch);
    exit;
}

$nsHubVar = nsp_hub_variant();
$nsHubTitle = nsp_hub_label();
$nsHubPoolJson = json_encode(nsp_hub_random_pool(), JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
?><!DOCTYPE html>
<html data-ns-site="<?= htmlspecialchars($nsHubVar) ?>" data-ns-ab="hub" data-ns-ver="hub-sketch-1" lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title><?= htmlspecialchars($nsHubTitle) ?> · MAP sketchpad hub</title>
<style>
html,body{margin:0;padding:0;height:100%;overflow:hidden;background:#000}

/* Cycling backgrounds - CSS gradients only (no external images) */
.bg1,.bg2,.bg3,.bg4,.bg5,.bg6,.bg7{
  width:100vw;height:100vh;position:absolute;background-size:cover;background-position:center;
  animation:fade 49s infinite;opacity:0;z-index:0;animation-play-state:running;animation-fill-mode:forwards
}
.bg1{background:linear-gradient(160deg,#1a0000 0%,#000 40%,rgba(179,0,0,.55) 100%);animation-delay:7s}
.bg2{background:linear-gradient(160deg,#1a0800 0%,#000 40%,rgba(255,111,0,.55) 100%);animation-delay:14s}
.bg3{background:linear-gradient(160deg,#1a1400 0%,#000 40%,rgba(255,204,0,.45) 100%);animation-delay:21s}
.bg4{background:linear-gradient(160deg,#001a00 0%,#000 40%,rgba(0,128,0,.5) 100%);animation-delay:28s}
.bg5{background:linear-gradient(160deg,#00001a 0%,#000 40%,rgba(0,0,255,.5) 100%);animation-delay:35s}
.bg6{background:linear-gradient(160deg,#0a001a 0%,#000 40%,rgba(128,0,255,.5) 100%);animation-delay:42s}
.bg7{background:linear-gradient(160deg,#1a001a 0%,#000 40%,rgba(153,51,153,.5) 100%);animation-delay:49s}
@keyframes fade{0%,14%,100%{opacity:0}7%{opacity:1}}

/* Pinwheel */
.square_pinwheel_container{
  width:100vmin;height:100vmin;max-width:100%;max-height:100%;display:flex;justify-content:center;align-items:center;
  border:0 solid #fff;position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);z-index:10
}
.circle_pinwheel_container{
  width:100%;height:0;padding-top:100%;display:flex;justify-content:center;align-items:center;position:relative;
  border:0 solid #000;border-radius:50%;animation:wobbleCircle 4s infinite alternate
}
.button-text{display:block;transform-origin:center;text-shadow:0 1px 3px rgba(0,0,0,.75)}
.button1 .button-text{animation:counterSpin1 90s infinite linear}
.button2 .button-text{animation:counterSpin2 90s infinite linear}
.button3 .button-text{animation:counterSpin3 90s infinite linear}
.button4 .button-text{animation:counterSpin4 90s infinite linear}
.button5 .button-text{animation:counterSpin5 90s infinite linear}
.button6 .button-text{animation:counterSpin6 90s infinite linear}
.button7 .button-text{animation:counterSpin7 90s infinite linear}
/* Hub "?" must counter-spin at SAME 90s period as .pinwheel-wrapper or the label tumbles */
.button8 .button-text{animation:counterSpin1 90s infinite linear}
@keyframes counterSpin1{from{transform:rotate(360deg)}to{transform:rotate(0deg)}}
@keyframes counterSpin2{from{transform:rotate(308.57deg)}to{transform:rotate(-51.43deg)}}
@keyframes counterSpin3{from{transform:rotate(257.14deg)}to{transform:rotate(-102.86deg)}}
@keyframes counterSpin4{from{transform:rotate(205.71deg)}to{transform:rotate(-154.29deg)}}
@keyframes counterSpin5{from{transform:rotate(154.29deg)}to{transform:rotate(-205.71deg)}}
@keyframes counterSpin6{from{transform:rotate(102.86deg)}to{transform:rotate(-257.14deg)}}
@keyframes counterSpin7{from{transform:rotate(51.43deg)}to{transform:rotate(-308.57deg)}}
.pinwheel-wrapper{
  position:absolute;inset:0;display:flex;justify-content:center;align-items:center;
  animation:spinCircle 90s infinite linear
}
@keyframes wobbleCircle{0%{transform:scale(1)}100%{transform:scale(1.05)}}
@keyframes spinCircle{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}
@keyframes oscillateOpacity{0%,100%{opacity:1}50%{opacity:.95}}
/* Center hub "?" stays discoverable (floor was .25 — near invisible mid-cycle) */
@keyframes oscillateOpacityMid{0%,100%{opacity:1}50%{opacity:.88}}

.button1,.button2,.button3,.button4,.button5,.button6,.button7,.button8{
  position:absolute;width:100%;height:100%;display:flex;justify-content:center;align-items:center;
  color:#fff;text-decoration:none;border-radius:0;font:6vh Georgia,serif;
  background-size:cover;background-position:center;background-repeat:no-repeat
}
/* Spokes 1-7 - CSS radial gradients only (no B*.jpg) */
.button1,.button2,.button3,.button4,.button5,.button6,.button7{
  clip-path:polygon(50% 65%,35% 58%,25% 45%,25% 55%,35% 42%,50% 35%,100% 50%);
  animation:oscillateOpacity 1s infinite
}
.button1{z-index:1;background:radial-gradient(circle at 60% 50%,rgba(255,80,80,.55),rgba(179,0,0,.92) 70%,#400);transform:rotate(0deg) translate(27.5%)}
.button2{z-index:2;background:radial-gradient(circle at 60% 50%,rgba(255,180,80,.55),rgba(255,111,0,.92) 70%,#520);transform:rotate(51.43deg) translate(27.5%)}
.button3{z-index:3;background:radial-gradient(circle at 60% 50%,rgba(255,240,120,.55),rgba(200,160,0,.9) 70%,#430);transform:rotate(102.86deg) translate(27.5%)}
.button4{z-index:4;background:radial-gradient(circle at 60% 50%,rgba(80,220,120,.55),rgba(0,128,0,.92) 70%,#030);transform:rotate(154.29deg) translate(27.5%)}
.button5{z-index:5;background:radial-gradient(circle at 60% 50%,rgba(100,140,255,.55),rgba(0,0,200,.92) 70%,#002);transform:rotate(205.71deg) translate(27.5%)}
.button6{z-index:6;background:radial-gradient(circle at 60% 50%,rgba(200,120,255,.55),rgba(128,0,255,.92) 70%,#204);transform:rotate(257.14deg) translate(27.5%)}
.button7{z-index:7;background:radial-gradient(circle at 60% 50%,rgba(220,120,220,.55),rgba(153,51,153,.92) 70%,#303);transform:rotate(308.57deg) translate(27.5%)}
/* Center hub "?" → equal-weight HUB_POOL (NSU products + in-file sketches); face always "?"; never TRAIN */
.button8,.pin-hub{
  z-index:20;animation:oscillateOpacityMid 7s infinite;
  width:16%;height:16%;left:50%;top:50%;margin:0;
  transform:translate(-50%,-50%);
  clip-path:none;border-radius:50%;
  border:2px solid #fff;
  background:radial-gradient(circle at 40% 35%,#6af,#048 55%,#012);
  box-shadow:0 0 18px rgba(0,180,255,.45),inset 0 0 12px rgba(255,255,255,.15);
  font:clamp(22px,5.5vmin,40px)/1 Georgia,serif;font-weight:900;letter-spacing:0;
  text-align:center;text-transform:none
}
/* Hover scale only when a real hover pointer exists — avoids sticky :hover scale on touch.
   Does NOT pause spin (never animation-play-state:paused). Transform order matches rest state. */
@media (hover:hover){
  .button8:hover,.pin-hub:hover{transform:translate(-50%,-50%) scale(1.12);filter:brightness(1.15)}
  .button1:hover{transform:rotate(0deg) translate(29.5%) scale(1.1)}
  .button2:hover{transform:rotate(51.43deg) translate(29.5%) scale(1.1)}
  .button3:hover{transform:rotate(102.86deg) translate(29.5%) scale(1.1)}
  .button4:hover{transform:rotate(154.29deg) translate(29.5%) scale(1.1)}
  .button5:hover{transform:rotate(205.71deg) translate(29.5%) scale(1.1)}
  .button6:hover{transform:rotate(257.14deg) translate(29.5%) scale(1.1)}
  .button7:hover{transform:rotate(308.57deg) translate(29.5%) scale(1.1)}
}

/* HARD: pinwheel NEVER stops on hover/focus/interaction. Do not re-add animation-play-state:paused. */
/* prefers-reduced-motion only (a11y) -- not (hover:none); touch still gets a living wheel. */
/* Consent first: MAP links must not accept pointer hits under the gate (keyboard uses inert/tabindex in boot). */
body:not(.ns-entered) .square_pinwheel_container{pointer-events:none}
body.ns-entered .square_pinwheel_container{pointer-events:auto}
@media (prefers-reduced-motion:reduce){
  .bg1,.bg2,.bg3,.bg4,.bg5,.bg6,.bg7{animation:none!important;opacity:0}
  .bg1{opacity:.55}
  .circle_pinwheel_container,.pinwheel-wrapper,
  .button1,.button2,.button3,.button4,.button5,.button6,.button7,.button8,.pin-hub{animation:none!important}
  .ns-entry-box{animation:none!important}
  .button1 .button-text{animation:none!important;transform:rotate(0deg)}
  .button2 .button-text{animation:none!important;transform:rotate(-51.43deg)}
  .button3 .button-text{animation:none!important;transform:rotate(-102.86deg)}
  .button4 .button-text{animation:none!important;transform:rotate(-154.29deg)}
  .button5 .button-text{animation:none!important;transform:rotate(-205.71deg)}
  .button6 .button-text{animation:none!important;transform:rotate(-257.14deg)}
  .button7 .button-text{animation:none!important;transform:rotate(-308.57deg)}
  .button8 .button-text{animation:none!important;transform:rotate(0deg)}
}
/* Spokes only — hub "?" keeps its own clamp so mobile media does not shrink the center CTA */
@media (max-width:780px){.button1,.button2,.button3,.button4,.button5,.button6,.button7{font-size:5vh}}
@media (max-width:480px){.button1,.button2,.button3,.button4,.button5,.button6,.button7{font-size:4vh}}

:root{--ns-dna:#c22;--ns-dna-btn:#411}
/* === EMPIRE ENTRY MODAL (chat DNA: tools + desc + enter; no banner) === */
.ns-entry{display:none;position:fixed;inset:0;z-index:99999;background:rgba(0,0,0,.97);align-items:center;justify-content:center;padding:clamp(8px,1.5vmin,16px);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);font-family:system-ui,-apple-system,Segoe UI,Arial,sans-serif}
.ns-entry.show{display:flex}
.ns-entry-box{width:min(96vw,720px);height:min(94vh,100dvh,920px);max-height:min(94vh,100dvh);display:flex;flex-direction:column;gap:clamp(6px,1.2vh,12px);padding:clamp(12px,2.2vmin,22px);box-sizing:border-box;background:linear-gradient(180deg,#0e0e14 0%,#000 55%);border:2px solid rgba(255,255,255,.75);border-radius:16px;color:#eef2f8;box-shadow:0 0 0 1px rgba(255,255,255,.18),0 28px 90px rgba(0,0,0,.9),0 0 50px rgba(204,34,34,.2);position:relative;overflow:hidden}
.ns-entry-box::before{content:"";position:absolute;left:0;right:0;top:0;height:4px;background:linear-gradient(90deg,#c22,#fff,#c22);z-index:2}
.ns-entry-tools{display:grid;grid-template-columns:1fr 1fr 1fr;gap:clamp(6px,1.5vw,12px);min-height:clamp(48px,9vh,64px);flex-shrink:0;margin-top:4px}
.ns-entry-tools button{border:1px solid rgba(255,255,255,.45);border-radius:12px;background:rgba(255,255,255,.05);color:#d8e2ee;font-weight:900;font-size:clamp(13px,2.8vmin,17px);cursor:pointer;letter-spacing:.02em}
.ns-entry-tools button:hover{background:rgba(255,255,255,.1);color:#fff}
.ns-entry-kicker{margin:0;text-align:center;font-size:clamp(10px,1.6vmin,12px);letter-spacing:.18em;text-transform:uppercase;color:#c22;font-weight:800;flex-shrink:0}
.ns-entry-title{margin:0;text-align:center;font-size:clamp(1.45rem,5.2vmin,2.35rem);font-weight:950;line-height:1.05;color:#fff;text-shadow:0 0 18px rgba(204,34,34,.4);flex-shrink:0}
.ns-entry-features{list-style:none;margin:0;padding:0;flex:1;min-height:0;overflow:auto;display:flex;flex-direction:column;gap:clamp(6px,1.1vh,10px)}
.ns-entry-features li{flex:1;display:flex;flex-direction:column;justify-content:center;padding:clamp(8px,1.4vh,12px) clamp(10px,2vw,14px);border:1px solid rgba(204,34,34,.27);border-radius:10px;background:rgba(255,255,255,.04);text-align:center;font-size:clamp(12px,2.15vmin,15px);line-height:1.25}
.ns-entry-features strong{display:block;color:#fff;font-weight:900;margin-bottom:2px;font-size:1.05em}
.ns-entry-features span{color:#c9d3e0}
.ns-entry-risk{margin:0;text-align:center;font-size:clamp(11px,2vmin,13px);font-weight:800;color:#c2ccd9;padding:clamp(6px,1vh,10px) 4px 0;border-top:1px solid rgba(255,255,255,.16);flex-shrink:0;line-height:1.3}
.ns-entry-enter{flex-shrink:0;min-height:clamp(52px,11vh,72px);border:2px solid #c22;border-radius:12px;background:#411;color:#fff;font-weight:950;font-size:clamp(16px,3.4vmin,22px);letter-spacing:.1em;cursor:pointer;text-transform:uppercase;display:flex;align-items:center;justify-content:center;gap:.6em;box-shadow:0 0 24px rgba(204,34,34,.33)}
.ns-entry-enter small{font-size:1em;letter-spacing:.14em}
.ns-entry-enter:hover{filter:brightness(1.15)}
.ns-entry-minor{flex-shrink:0;min-height:clamp(40px,7vh,52px);margin-top:6px;border:1px solid #f66;border-radius:10px;background:rgba(80,0,0,.55);color:#fbb;font-weight:800;font-size:clamp(12px,2.2vmin,15px);cursor:pointer}
.ns-entry-minor:hover{filter:brightness(1.1)}
.ns-sub{display:none;position:fixed;inset:0;z-index:100000;background:rgba(0,0,0,.88);align-items:center;justify-content:center;padding:14px}
.ns-sub.show{display:flex}
.ns-sub-box{width:min(520px,96vw);max-height:90vh;overflow:auto;background:#0d0d12;border:1px solid #fff;border-radius:14px;padding:16px 18px;color:#eee;font:13px/1.45 system-ui,Arial,sans-serif;position:relative}
.ns-sub-box h3{margin:0 0 10px;font-size:16px;letter-spacing:.08em;text-transform:uppercase}
.ns-sub-box p{margin:0 0 8px;color:#ccc}
.ns-sub-box a{color:#8cf;word-break:break-all}
.ns-sub-box ul{margin:8px 0 0 18px;padding:0}
.ns-sub-box .addr{display:block;margin:8px 0;padding:10px;border:1px solid #444;border-radius:8px;background:#111;font:12px/1.35 ui-monospace,monospace;word-break:break-all;cursor:pointer}
.ns-sub-box .addr b{display:block;color:#aaa;font-size:10px;letter-spacing:.12em;margin-bottom:4px}
.ns-sub-box .close-x{position:absolute;top:8px;right:10px;border:0;background:transparent;color:#fff;font-size:22px;cursor:pointer;line-height:1}
.ns-sub-box .ns-sub-close{width:100%;margin-top:12px;padding:12px;border:1px solid #fff;background:#222;color:#fff;cursor:pointer;text-transform:uppercase;font-weight:800;border-radius:8px}
</style>
<style data-ns-entry-polish="1">
.ns-entry{z-index:2147483000}
.ns-entry-box{animation:nsEntryIn .28s ease-out}
@keyframes nsEntryIn{from{opacity:0;transform:scale(.97) translateY(8px)}to{opacity:1;transform:none}}
.ns-entry-tools button{transition:background .15s,transform .12s,border-color .15s;min-height:48px}
.ns-entry-tools button:active{transform:scale(.98)}
.ns-entry-tools button:hover{border-color:rgba(255,255,255,.75)}
.ns-entry-enter{transition:filter .15s,transform .12s,box-shadow .15s}
.ns-entry-enter:active{transform:scale(.99)}
.ns-entry-features li{transition:border-color .15s,background .15s}
.ns-sub{z-index:2147483001}
.ns-sub-box .close-x{
  width:40px;height:40px;border-radius:10px;
  background:rgba(255,255,255,.06)!important;
  border:1px solid rgba(255,255,255,.25)!important;
  font-size:20px!important;line-height:1;color:#fff
}
.ns-sub-box .close-x:hover{background:rgba(255,255,255,.12)!important}
.ns-sub-box .addr:hover{border-color:#8cf}
.ns-entry.hidden,.ns-entry:not(.show){display:none!important}
body.ns-entered .ns-entry{display:none!important}
.age-verification-overlay.ns-entry{display:none;background:rgba(0,0,0,.97);border:0;text-shadow:none;font-size:inherit}
.age-verification-overlay.ns-entry.show{display:flex}
.age-verification-overlay.ns-entry.hidden{display:none!important}
.modal-bg.ns-entry{display:none}
.modal-bg.ns-entry.show{display:flex!important}
</style>
</head>
<body>
<div class="bg1"></div>
<div class="bg2"></div>
<div class="bg3"></div>
<div class="bg4"></div>
<div class="bg5"></div>
<div class="bg6"></div>
<div class="bg7"></div>
<div class="square_pinwheel_container">
  <div class="circle_pinwheel_container">
    <div class="pinwheel-wrapper">
      <a href="https://nosignup.trade/" class="button1" target="_blank" rel="noopener" title="Trade — NSU rails, ads, wallets"><span class="button-text">Trade</span></a>
      <a href="https://nosignup.chat/" class="button2" target="_blank" rel="noopener" title="Chat — peer chat, no signup"><span class="button-text">Chat</span></a>
      <a href="https://nosignup.work/" class="button3" target="_blank" rel="noopener" title="Work — jobs and resumes"><span class="button-text">Work</span></a>
      <a href="https://nosignup.market/" class="button4" target="_blank" rel="noopener" title="Market — classifieds"><span class="button-text">Market</span></a>
      <a href="https://nosignup.date/" class="button5" target="_blank" rel="noopener" title="Date — personals"><span class="button-text">Date</span></a>
      <a href="https://nosignup.fun/" class="button6" target="_blank" rel="noopener" title="Fun — media organism"><span class="button-text">Fun</span></a>
      <a href="https://nosignup.info/" class="button7" target="_blank" rel="noopener" title="Info — modules"><span class="button-text">Info</span></a>
      <a href="?sketch=morse" class="button8 pin-hub" id="nsHub" target="_blank" rel="noopener" title="? — equal random: NSU product OR in-file sketch (Morse/ASL…). Free, no signup."><span class="button-text">?</span></a>
    </div>
  </div>
</div>
<style data-ns-entry-designer="1">
/* Empire entrance: absolute-% real-estate (chat/fun/morse) — com skin */
.ns-entry{display:none!important;position:fixed;inset:0;z-index:2147483000;background:rgba(0,0,0,.97);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);font-family:system-ui,-apple-system,Segoe UI,Arial,sans-serif;text-shadow:none}
.ns-entry.show,.age-verification-overlay.ns-entry.show,.modal-bg.ns-entry.show{display:block!important}
.ns-entry.hidden,.ns-entry:not(.show),body.ns-entered .ns-entry{display:none!important}
.ns-entry-box{
  position:absolute!important;inset:1.4%!important;width:auto!important;height:auto!important;max-height:none!important;
  display:block!important;flex-direction:unset!important;gap:0!important;padding:0!important;margin:0!important;
  overflow:hidden;box-sizing:border-box;
  background:linear-gradient(165deg,#0c0c12 0%,#050508 48%,#000 100%)!important;
  border:0.28vmin solid #e05555!important;border-radius:1.6%!important;color:#eef2f8!important;
  box-shadow:0 0 0 1px rgba(255,255,255,.12),0 0 3.5% rgba(224,85,85,.40),inset 0 0 8% rgba(0,0,0,.35)!important;
  animation:nsDesIn .32s cubic-bezier(.2,.8,.2,1) both;
}
@keyframes nsDesIn{from{opacity:0;transform:scale(.972)}to{opacity:1;transform:none}}
.ns-entry-box::before{content:"";position:absolute;left:0;right:0;top:0;height:0.55%;background:linear-gradient(90deg,#e05555,#fff,#fff);z-index:3;opacity:.95}
.ns-entry-tools,.ns-entry-head,.ns-entry-features,.ns-entry-risk,.ns-entry-enter,.ns-entry-minor{position:absolute!important;left:4%!important;right:4%!important;margin:0!important;box-sizing:border-box}
.ns-entry-tools{top:2.8%!important;height:9.2%!important;display:block!important;grid-template-columns:unset!important;gap:0!important;min-height:0!important}
.ns-entry-tools button{
  position:absolute!important;top:0!important;width:30%!important;height:100%!important;margin:0!important;padding:0 1%!important;
  border:0.14vmin solid rgba(255,255,255,.42)!important;border-radius:1.1%!important;
  background:rgba(255,255,255,.045)!important;color:#dce4ef!important;font-weight:900!important;
  font-size:min(3.1vh,3.5vw)!important;letter-spacing:.04em!important;cursor:pointer;text-transform:none;
  display:flex!important;align-items:center;justify-content:center;transition:background .15s,border-color .15s,transform .12s,color .15s;
}
.ns-entry-tools button:nth-child(1){left:0!important}
.ns-entry-tools button:nth-child(2){left:35%!important}
.ns-entry-tools button:nth-child(3){left:70%!important}
.ns-entry-tools button:hover{background:rgba(255,255,255,.1)!important;border-color:#e05555!important;color:#fff!important}
.ns-entry-tools button:active{transform:scale(.985)}
.ns-entry-head{top:13.5%!important;height:13%!important;text-align:center!important;display:block!important}
.ns-entry-kicker{
  position:absolute!important;left:0;right:0;top:0;height:30%;margin:0!important;padding:0;
  font-size:min(1.9vh,2.6vw)!important;letter-spacing:.18em!important;text-transform:uppercase!important;
  color:#e05555!important;font-weight:800!important;display:flex;align-items:flex-end;justify-content:center;
}
.ns-entry-title,.ns-entry-head h1{
  position:absolute!important;left:0;right:0;top:28%;height:72%;margin:0!important;padding:0;
  font-size:min(6.2vh,7.2vw)!important;font-weight:950!important;line-height:.95!important;color:#fff!important;
  text-shadow:0 0 2.2% rgba(224,85,85,.40)!important;display:flex;align-items:center;justify-content:center;
  letter-spacing:-.01em;
}
.ns-entry-features{
  top:28%!important;height:40%!important;list-style:none!important;margin:0!important;padding:0!important;
  display:block!important;overflow:visible!important;flex:unset!important;min-height:0!important;gap:0!important;
}
.ns-entry-features li{
  position:absolute!important;left:0!important;right:0!important;height:23%!important;
  flex:unset!important;display:flex!important;flex-direction:column!important;justify-content:center!important;
  padding:0.35% 2.2%!important;box-sizing:border-box;
  border:0.12vmin solid rgba(224,85,85,.30)!important;border-radius:1%!important;
  background:rgba(255,255,255,.035)!important;text-align:center!important;
  font-size:min(2.05vh,3.3vw)!important;line-height:1.08!important;overflow:hidden;
  transition:border-color .15s,background .15s;
}
.ns-entry-features li:nth-child(1){top:0!important}
.ns-entry-features li:nth-child(2){top:25.5%!important}
.ns-entry-features li:nth-child(3){top:51%!important}
.ns-entry-features li:nth-child(4){top:76.5%!important}
.ns-entry-features li:nth-child(n+5){display:none!important}
.ns-entry-features strong{display:block;color:#fff;font-weight:900;margin:0 0 .15em;font-size:1.02em;letter-spacing:.02em}
.ns-entry-features span{display:block;color:#c5cfdb;font-weight:650}
.ns-entry-risk{
  top:70.5%!important;height:8%!important;margin:0!important;padding:0.4% 1%!important;
  border-top:0.12vmin solid rgba(255,255,255,.14)!important;border-bottom:none!important;
  font-size:min(2.05vh,3.1vw)!important;font-weight:800!important;color:#b8c2d0!important;
  text-align:center!important;line-height:1.2!important;
  display:flex!important;flex-direction:column!important;justify-content:center!important;align-items:center;
}
.ns-entry-risk span{display:block}
.ns-entry-enter{
  bottom:10.5%!important;height:11%!important;min-height:0!important;width:auto!important;
  border:0.22vmin solid #e05555!important;border-radius:1.15%!important;background:rgba(90,20,20,.94)!important;
  color:#fff!important;font-weight:950!important;font-size:min(3.5vh,4.8vw)!important;
  letter-spacing:.12em!important;cursor:pointer;text-transform:uppercase!important;
  display:flex!important;align-items:center;justify-content:center;gap:3%;
  box-shadow:0 0 2.8% rgba(224,85,85,.40),inset 0 0 12% rgba(255,255,255,.05)!important;
  transition:filter .15s,transform .12s,box-shadow .15s;
}
.ns-entry-enter small{font-size:1em;letter-spacing:.14em;opacity:.95}
.ns-entry-enter:hover{filter:brightness(1.12);box-shadow:0 0 4% rgba(224,85,85,.40),inset 0 0 14% rgba(255,255,255,.07)!important}
.ns-entry-enter:active{transform:scale(.99)}
.ns-entry-minor{
  bottom:2.2%!important;height:7%!important;min-height:0!important;margin:0!important;width:auto!important;
  border:0.14vmin solid #f66!important;border-radius:1%!important;background:rgba(70,0,0,.55)!important;
  color:#fcc!important;font-weight:800!important;font-size:min(2.15vh,3.1vw)!important;cursor:pointer;
  display:flex!important;align-items:center;justify-content:center;letter-spacing:.03em;
  transition:filter .15s,background .15s;
}
.ns-entry-minor:hover{filter:brightness(1.12);background:rgba(100,0,0,.62)!important}
/* short phone: tighten type, keep same slots */
@media (max-height:560px){
  .ns-entry-title,.ns-entry-head h1{font-size:min(5.2vh,6.5vw)!important}
  .ns-entry-features li{font-size:min(1.85vh,3.1vw)!important}
  .ns-entry-kicker{font-size:min(1.65vh,2.3vw)!important;letter-spacing:.14em!important}
}
@media (max-width:380px){
  .ns-entry-tools button{font-size:min(2.8vh,3.2vw)!important;letter-spacing:.02em!important}
}
</style>


<div class="ns-entry show" id="nsGate" role="dialog" aria-modal="true" aria-labelledby="nsEntryTitle">
  <div class="ns-entry-box">
    <div class="ns-entry-tools" aria-label="Entry tools">
      <button type="button" id="nsOptBtn">Options</button>
      <button type="button" id="nsMirBtn">Mirrors</button>
      <button type="button" id="nsDonBtn">Donate</button>
    </div>
    <header class="ns-entry-head">
      <p class="ns-entry-kicker">MAP · sketchpad hub · AB landing (<?= htmlspecialchars($nsHubVar) ?>)</p>
      <h1 class="ns-entry-title" id="nsEntryTitle"><?= htmlspecialchars($nsHubTitle) ?></h1>
    </header>
    <ul class="ns-entry-features"><li><strong>Map</strong><span>Spokes = NSU sites · center ? = random product or sketch</span></li><li><strong>Sketchpad</strong><span>Morse & ASL trainers live here — equal real-estate</span></li><li><strong>No signup</strong><span>Explore free · no account · no app install</span></li><li><strong>Tools</strong><span>Options · Mirrors · Donate work before ENTER</span></li></ul>
    <p class="ns-entry-risk"><span>Experimental · unmoderated · no recovery desk</span><span>enter at your own risk.</span></p>
    <button type="button" class="ns-entry-enter" id="nsAgree" aria-label="I agree to these terms, enter"><span>I AGREE TO THESE TERMS</span><small>ENTER</small></button>
    <button type="button" class="ns-entry-minor" id="nsMinorLeave">I am a minor — leave</button>
  </div>
</div>
<div class="ns-sub" id="nsOptModal" role="dialog" aria-modal="true"><div class="ns-sub-box"><button type="button" class="close-x" data-close="nsOptModal" aria-label="close">x</button><h3>Options</h3><p>Site options stay in <b>this browser</b> only. Not an account.</p><p><button type="button" id="nsOptDbg" style="width:100%;padding:12px;margin:6px 0;border:1px solid #0f0;background:#031;color:#0f0;font-weight:800;cursor:pointer">Toggle DBG overlay</button></p><p><a href="?src=1" target="_blank" rel="noopener">View source (?src=1)</a> · <a href="?download=1">Download nosignup-<?= htmlspecialchars(nsp_hub_variant()) ?>.php</a></p><p style="opacity:.75;font-size:12px">Clear entry agreement (re-show gate): <button type="button" id="nsOptReset" style="padding:6px 10px;cursor:pointer">Reset ENTER</button></p><button type="button" class="ns-sub-close" data-close="nsOptModal">Close</button></div></div>
<div class="ns-sub" id="nsMirModal" role="dialog" aria-modal="true"><div class="ns-sub-box"><button type="button" class="close-x" data-close="nsMirModal" aria-label="close">x</button><h3>Mirrors</h3><p><b>Free tributaries.</b> Host a copy · help the network · zero cut · no price power. Mirrors welcome — gossip and findability. No daily faucet wage in v1 until hits are parent-verifiable. Host because the swarm is hard to kill. One <code>.php</code> file — drop free on any PHP host. Cashflow / NSU rails stay on <a href="https://nosignup.trade/" target="_blank" rel="noopener">nosignup.trade</a> (not minted here · hub MAP has no visitor faucet).</p><p><a href="?download=1">↓ Download this file</a> · <a href="?src=1" target="_blank" rel="noopener">View source</a></p><p style="font-size:12px;opacity:.85;margin:8px 0 4px">Known public roots:</p><ul id="nsMirList"></ul><button type="button" class="ns-sub-close" data-close="nsMirModal">Close</button></div></div>
<div class="ns-sub" id="nsDonModal" role="dialog" aria-modal="true"><div class="ns-sub-box"><button type="button" class="close-x" data-close="nsDonModal" aria-label="close">x</button><h3>Donate</h3><p>One <code>.php</code> file. No build step. Optional — never required.</p><div class="addr" data-copy="bc1qqnu6n0jztxl4f6krv7klradghle09uhyu7uymz"><b>BITCOIN</b>bc1qqnu6n0jztxl4f6krv7klradghle09uhyu7uymz</div><div class="addr" data-copy="8Ab24DppUvcdtHfm7K8gTqdBTmPCBiak1GwxgPm1C3osYVQL2QdC1C8GMwggKF77RKKzDgP2R8E3VH8ifetsKms5AqkVyVg"><b>MONERO</b>8Ab24DppUvcdtHfm7K8gTqdBTmPCBiak1GwxgPm1C3osYVQL2QdC1C8GMwggKF77RKKzDgP2R8E3VH8ifetsKms5AqkVyVg</div><div class="addr" data-copy="ltc1qlpdy8qzejcmjdn6vwarpyz8djdlk780w4qkwyp"><b>LITECOIN</b>ltc1qlpdy8qzejcmjdn6vwarpyz8djdlk780w4qkwyp</div><p style="font-size:12px;opacity:.75">Tap address to copy · also see nosignup.trade faucet/rails</p><button type="button" class="ns-sub-close" data-close="nsDonModal">Close</button></div></div>


<script data-ns-entry-boot="1">
(function(){
  if (window.__NS_ENTRY_BOOT__) return;
  window.__NS_ENTRY_BOOT__ = 1;
  /* Shared gate key across com/org/net so AB landings feel like one product */
  var KEY = 'nshub_ab_gate_v1';
  var GATE_ID = 'nsGate';
  var ENTER_ID = 'nsAgree';
  var MIRRORS = [
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    'https://nosignup.market/','https://nosignup.date/','https://nosignup.fun/','https://nosignup.info/'
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  /* Equal-weight pool: NSU products + in-file sketches (PHP memory) */
  var HUB_POOL = <?= $nsHubPoolJson ?: '[]' ?>;
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  (function wireHubRandom(){
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        if (!e || !e.href) return;
        hub.href = e.href;
        hub.title = '? — ' + (e.label || e.id || 'random') + ' · equal draw · free, no signup';
        /* sketches stay on hub host; products open sister domains */
        hub.target = (e.kind === 'sketch' || (e.href && e.href.indexOf('?sketch=') === 0)) ? '_self' : '_blank';
        if (hub.target === '_blank') hub.rel = 'noopener';
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    pick();
    hub.addEventListener('mouseenter', pick);
    hub.addEventListener('focus', pick);
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  }
  function showGate(){
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    g.style.display = 'flex';
    setMapInteractive(false);
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    if (typeof window.__nsDbgSyncFab === 'function') {
      try { window.__nsDbgSyncFab(); } catch (e) {}
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      return;
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      i.value = t; i.style.position = 'fixed'; i.style.opacity = '0';
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  try { localStorage.removeItem(KEY); } catch (e) {}
  setMapInteractive(false);
  showGate();

  function closeAllSubs(){
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      m.classList.remove('show');
      m.style.display = 'none';
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  }
  function syncDbgBtnLabel(){
    var dg = el('nsOptDbg');
    if (!dg) return;
    var on = false;
    try { on = localStorage.getItem('ns_empire_dbg_v1') === '1'; } catch (e) {}
    dg.textContent = on ? 'Toggle DBG overlay - ON' : 'Toggle DBG overlay - OFF';
  }

  var enter = el(ENTER_ID);
  if (enter && !enter.__nsWired) {
    enter.__nsWired = 1;
    enter.addEventListener('click', function(){
      /* consent is this page load only — not stored */
      /* Belt: never leave Options/Mirrors/Donate stacked over the map after agree */
      closeAllSubs();
      hideGate();
      if (window.__nsOnEnter) { try { window.__nsOnEnter(); } catch (e) {} }
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  }

  var minorLeave = el('nsMinorLeave');
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    });
  }

  var list = el('nsMirList');
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    list.innerHTML = MIRRORS.map(function(u){
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  var ob = el('nsOptBtn');
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      openSub('nsOptModal');
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  var mb = el('nsMirBtn');
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  var db = el('nsDonBtn');
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    db.__nsWired = 1;
    db.addEventListener('click', function(){
      if (window.NSFOpenDonate) { try { window.NSFOpenDonate(); return; } catch (e) {} }
      openSub('nsDonModal');
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  }

  document.querySelectorAll('[data-close]').forEach(function(b){
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    b.__nsWired = 1;
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    m.__nsWired = 1;
    m.addEventListener('click', function(e){
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  document.querySelectorAll('.addr[data-copy], .d-addr[data-copy]').forEach(function(node){
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    node.__nsWired = 1;
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  var rd = el('nsOptReset');
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    rd.addEventListener('click', function(){
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      showGate();
      var ag = el(ENTER_ID);
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    });
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  var dg = el('nsOptDbg');
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    dg.__nsWired = 1;
    dg.addEventListener('click', function(){
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      var on = false;
      if (typeof window.__nsDbgToggle === 'function') {
        try { on = !!window.__nsDbgToggle(); } catch (e) {}
      } else {
        var f = el('nsDbgFab');
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          var before = false;
          try { before = localStorage.getItem('ns_empire_dbg_v1') === '1'; } catch (e) {}
          f.click();
          on = !before;
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      dg.textContent = on ? 'Toggle DBG overlay - ON' : 'Toggle DBG overlay - OFF';
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  }
  /* Escape closes open Options/Mirrors/Donate submodals */
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        m.style.display = 'none';
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    });
  }
})();
</script>
<script>
/* NOSIGNUP empire debug DNA -- toggleable; copy-paste for model handoff. Opt-in only. */
(function(){
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  var KEY = 'ns_empire_dbg_v1';
  var SITE = (document.documentElement.getAttribute('data-ns-site')
    || (location.hostname || '').replace(/^www\./,'')
    || 'nosignup');
  var VER = (document.documentElement.getAttribute('data-ns-ver') || '');
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  var logs = [];
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  function pushLog(m){ logs.unshift(String(m).slice(0,200)); if(logs.length>20) logs.pop(); }
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  window.addEventListener('unhandledrejection', function(e){
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  var open = false;
  var fabKnown = false;
  try {
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    fabKnown = _dbg === '1' || _dbg === '0';
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    var lines = [];
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    lines.push('url=' + location.href);
    lines.push('ts=' + new Date().toISOString());
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    lines.push('--- localStorage (ns*) ---');
    var lk = lsKeys(); lines.push(lk.length ? lk.join('\n') : '(none)');
    lines.push('--- recent errors ---');
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    lines.push('--- notes ---');
    lines.push(logs.length ? logs.join('\n') : '(none)');
    lines.push('=== END ===');
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    fab.onmouseenter = function(){ fab.style.opacity = '1'; };
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  if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', ensureUi);
  else ensureUi();
})();
</script>
</body>
</html>