/* Shared nav, sheets, toast, footer. Own tokens (--pp-*) so it fits both pages. */
:root{--pp-bg:#fff;--pp-surface:#fff;--pp-muted:#f6f7f9;--pp-ink:#1a1a1a;--pp-ink2:#475467;--pp-soft:#5b6472;--pp-hair:rgba(0,0,0,.09);--pp-line:rgba(0,0,0,.18);--pp-brand:#185fa5;--pp-brand-d:#134e87;--pp-tint:#e6f1fb;--pp-brand-t:#185fa5;--pp-on:#fff;--pp-good:#137333;--pp-good-t:#e7f6ec;--pp-bad:#b42318;--pp-warn-t:#fff6d6}
@media(prefers-color-scheme:dark){:root{--pp-bg:#0a0b0d;--pp-surface:#14161a;--pp-muted:#0f1114;--pp-ink:#f5f6f7;--pp-ink2:#c1c7d0;--pp-soft:#9aa3b0;--pp-hair:rgba(255,255,255,.1);--pp-line:rgba(255,255,255,.2);--pp-tint:#1c3a5e;--pp-brand-t:#9ec5ed;--pp-good:#4ade80;--pp-good-t:#12301f;--pp-bad:#ff8a80;--pp-warn-t:#3a3212}}
.pp-nav{position:sticky;top:0;z-index:60;background:color-mix(in srgb,var(--pp-bg) 95%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--pp-hair);font:400 15px/1.4 Inter,system-ui,-apple-system,sans-serif;color:var(--pp-ink)}
.pp-nav[hidden]{display:none!important}
.pp-nav-in{max-width:72rem;margin:0 auto;padding:0 16px;display:flex;flex-wrap:wrap;align-items:center;gap:0 6px}
.pp-logo{display:flex;align-items:center;gap:8px;min-height:48px;font-weight:700;font-size:18px;text-decoration:none;color:var(--pp-ink);margin-right:6px}
.pp-logo i{width:28px;height:28px;border-radius:6px;background:var(--pp-brand);color:#fff;display:grid;place-items:center;font:700 14px/1 Inter;font-style:normal}
.pp-logo small{font-size:11px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--pp-brand-t);border:1px solid var(--pp-line);border-radius:4px;padding:1px 6px}
.pp-links{display:flex;align-items:center;gap:0 2px;order:2;flex:1 1 auto;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.pp-links::-webkit-scrollbar{display:none}
.pp-links a{white-space:nowrap;min-height:44px;display:inline-flex;align-items:center;gap:6px;padding:0 10px;font-size:14px;font-weight:500;color:var(--pp-ink2);text-decoration:none;border-radius:6px}
.pp-links a[hidden]{display:none}
.pp-links a:hover{color:var(--pp-brand-t);background:var(--pp-muted)}
.pp-links a[aria-current=page]{color:var(--pp-brand-t);background:var(--pp-tint)}
.pp-links .cnt{min-width:20px;height:20px;padding:0 6px;border-radius:99px;background:var(--pp-brand);color:#fff;font-size:12px;font-weight:700;display:inline-grid;place-items:center}
.pp-acct{order:1;margin-left:auto;position:relative}
.pp-acct>button{min-height:44px;display:inline-flex;align-items:center;gap:8px;padding:0 12px;border:1px solid var(--pp-line);border-radius:10px;background:var(--pp-surface);color:var(--pp-ink);font:500 14px Inter,sans-serif;cursor:pointer;max-width:200px}
.pp-acct>button{min-width:0}
.pp-acct>button span.t{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pp-chip{display:inline-flex;align-items:center;height:22px;padding:0 8px;border-radius:5px;font:600 11px Inter,sans-serif;letter-spacing:.03em;background:var(--pp-muted);color:var(--pp-ink2);border:1px solid var(--pp-hair);white-space:nowrap}
.pp-chip.on{background:var(--pp-good-t);color:var(--pp-good);border-color:transparent}
.pp-menu{position:absolute;right:0;top:calc(100% + 6px);min-width:250px;background:var(--pp-surface);border:1px solid var(--pp-line);border-radius:12px;padding:8px;box-shadow:0 12px 32px rgba(16,24,40,.18);z-index:70}
.pp-menu[hidden]{display:none}
.pp-menu .who{padding:8px 10px;font-size:13px;color:var(--pp-ink2);border-bottom:1px solid var(--pp-hair);margin-bottom:4px;word-break:break-all}
.pp-menu .who b{display:block;color:var(--pp-ink);font-size:14px}
.pp-menu button,.pp-menu a{display:flex;width:100%;min-height:44px;align-items:center;padding:0 10px;border:0;background:none;color:var(--pp-ink);font:500 14px Inter,sans-serif;text-align:left;text-decoration:none;border-radius:8px;cursor:pointer}
.pp-menu button:hover,.pp-menu a:hover{background:var(--pp-muted)}
.pp-menu .danger{color:var(--pp-bad)}
.pp-nav :focus-visible,.pp-sheet :focus-visible,.pp-foot :focus-visible{outline:3px solid var(--pp-brand-t);outline-offset:2px}
@media(max-width:700px){.pp-logo small{display:none}.pp-links{order:3;flex-basis:100%}.pp-nav-in{padding:0 8px 0 12px}.pp-acct>button{max-width:150px}}
.pp-burger{display:none;order:3;min-height:48px;min-width:48px;align-items:center;justify-content:center;gap:6px;padding:0 10px;border:0;background:none;color:var(--pp-ink);font:500 14px Inter,sans-serif;cursor:pointer;border-radius:8px}
@media(max-width:600px){
.pp-nav-in{position:relative;flex-wrap:nowrap;gap:0}.pp-logo{margin-right:auto}.pp-acct{order:2;margin-left:0}.pp-acct>button{max-width:150px;min-height:44px}.pp-acct>button span.t{max-width:64px}
.pp-burger{display:inline-flex}
.pp-links{display:none;position:absolute;left:0;right:0;top:100%;order:unset;flex-direction:column;align-items:stretch;gap:2px;overflow:auto;max-height:calc(100dvh - 56px);padding:8px 12px 14px;background:var(--pp-surface);border-bottom:1px solid var(--pp-line);box-shadow:0 14px 28px rgba(16,24,40,.18)}
.pp-nav.open .pp-links{display:flex}
.pp-links a{min-height:48px;font-size:16px;padding:0 12px;justify-content:space-between}
.pp-menu{position:fixed;left:8px;right:8px;top:56px;min-width:0}
}
/* sheets */
.pp-over{position:fixed;inset:0;z-index:100;background:rgba(10,12,16,.55);display:flex;align-items:flex-end;justify-content:center;padding:0}
@media(min-width:640px){.pp-over{align-items:center;padding:24px}}
.pp-sheet{width:100%;max-width:30rem;max-height:92dvh;overflow:auto;background:var(--pp-surface);color:var(--pp-ink);border:1px solid var(--pp-line);border-radius:20px 20px 0 0;padding:24px 22px 22px;font:400 15px/1.55 Inter,system-ui,sans-serif;box-shadow:0 20px 60px rgba(0,0,0,.35)}
@media(min-width:640px){.pp-sheet{border-radius:20px}}
.pp-sheet h2{font:600 clamp(26px,1.2vw + 20px,32px)/1.12 Fraunces,Georgia,serif;letter-spacing:-.015em;margin:6px 0 10px}
.pp-sheet p{margin:0 0 12px}
.pp-demo{display:flex;gap:8px;align-items:flex-start;background:var(--pp-tint);border:1.5px dashed var(--pp-brand-t);border-radius:12px;padding:10px 12px;font-size:14px;font-weight:600;margin-bottom:12px}
.pp-sheet label.f{display:block;font-size:13px;font-weight:600;margin:10px 0 4px;color:var(--pp-ink2)}
.pp-sheet input[type=email],.pp-sheet input[type=text]{width:100%;min-height:48px;padding:0 12px;border:1.5px solid var(--pp-line);border-radius:10px;background:var(--pp-bg);color:var(--pp-ink);font:400 16px Inter,sans-serif}
.pp-sheet .chk{display:flex;gap:10px;align-items:flex-start;margin:14px 0;font-size:14px;color:var(--pp-ink2);min-height:44px}
.pp-sheet .chk input{width:22px;height:22px;margin:1px 0 0;flex:none;accent-color:var(--pp-brand)}
.pp-sheet .sum{display:flex;justify-content:space-between;gap:10px;padding:12px 0;border-top:1px solid var(--pp-hair);border-bottom:1px solid var(--pp-hair);margin:10px 0;font-size:15px}
.pp-sheet .sum b{font:600 20px Fraunces,Georgia,serif}
.pp-b{min-height:54px;padding:0 22px;border-radius:14px;border:1px solid var(--pp-brand);background:var(--pp-brand);color:#fff;font:600 17px Inter,sans-serif;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;text-decoration:none}
.pp-b:hover{background:var(--pp-brand-d)}
@media(prefers-color-scheme:dark){.pp-b:not(.ghost):not(.danger){background:#6fa8dc;border-color:#6fa8dc;color:#0a0b0d}.pp-b:not(.ghost):not(.danger):hover{background:#9ec5ed}}
.pp-b.ghost{background:var(--pp-surface);color:var(--pp-brand-t);border-color:var(--pp-line)}
.pp-b.ghost:hover{background:var(--pp-tint)}
.pp-b[disabled]{opacity:.5;cursor:not-allowed}
.pp-b.danger{background:var(--pp-bad);border-color:var(--pp-bad);color:#fff}
.pp-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.pp-row>*{flex:1 1 140px}
.pp-err{color:var(--pp-bad);font-size:13px;min-height:1.2em;margin:4px 0 0}
.pp-toast{position:fixed;left:50%;bottom:20px;transform:translateX(-50%);z-index:120;background:#1a1a1a;color:#fff;padding:12px 18px;border-radius:12px;font:500 14px Inter,sans-serif;max-width:90vw;box-shadow:0 8px 24px rgba(0,0,0,.3)}
.pp-foot{max-width:72rem;margin:0 auto;padding:18px 16px 28px;display:flex;flex-wrap:wrap;gap:4px 14px;align-items:center;justify-content:space-between;font:400 12.5px/1.5 Inter,sans-serif;color:var(--pp-soft);border-top:1px solid var(--pp-hair)}
.pp-foot button{min-height:44px;padding:0 10px;border:0;background:none;color:var(--pp-brand-t);text-decoration:underline;text-underline-offset:3px;font:500 13px Inter,sans-serif;cursor:pointer}
.pp-dots{display:inline-flex;gap:3px;vertical-align:middle}.pp-dots i{width:8px;height:8px;border-radius:50%;border:1.5px solid var(--pp-soft);box-sizing:border-box}.pp-dots i.on{background:var(--pp-brand);border-color:var(--pp-brand)}
.pp-due{display:inline-flex;align-items:center;height:22px;padding:0 8px;border-radius:5px;font:600 12px Inter,sans-serif;background:var(--pp-muted);color:var(--pp-ink2);border:1px solid var(--pp-hair);white-space:nowrap}.pp-due.now{background:var(--pp-tint);color:var(--pp-brand-t);border-color:transparent}
@media(prefers-reduced-motion:reduce){.pp-nav{backdrop-filter:none}}
@media print{.pp-nav,.pp-foot,.pp-over,.pp-toast{display:none!important}}
/* plan chooser (sheet + offer page): same radio rows as the home pricing card */
.pp-lbl{font-size:13px;font-weight:600;color:var(--pp-ink2);margin:10px 0 8px}
.pp-plans{display:grid;gap:8px;margin:2px 0 10px}
.pp-opt{position:relative;display:block;cursor:pointer}
.pp-opt input{position:absolute;opacity:0;inset:0;width:100%;height:100%;margin:0;cursor:pointer}
.pp-opt-in{display:flex;justify-content:space-between;align-items:center;gap:12px;min-height:60px;padding:8px 14px;border:1.5px solid var(--pp-line);border-radius:14px;background:var(--pp-surface);color:var(--pp-ink);transition:border-color .2s,background .2s}
.pp-opt:hover .pp-opt-in{border-color:var(--pp-brand)}
.pp-opt input:checked+.pp-opt-in{border-color:var(--pp-brand);background:var(--pp-tint)}
.pp-opt input:focus-visible+.pp-opt-in{outline:3px solid var(--pp-brand-t);outline-offset:2px}
.pp-opt-l{display:grid;min-width:0}
.pp-opt b{font:600 17px/1.3 Inter,system-ui,sans-serif}
.pp-opt small{color:var(--pp-ink2);font-size:14px;line-height:1.35}
.pp-opt small.pp-tag{font-weight:600;color:var(--pp-good)}
.pp-opt em{font:600 17px Inter,system-ui,sans-serif;font-style:normal;white-space:nowrap}
.pp-sumlist{margin:10px 0 4px;border:1px solid var(--pp-hair);border-radius:12px;background:var(--pp-muted);padding:4px 14px;font:400 14px/1.45 Inter,system-ui,sans-serif}
.pp-sumlist>div{display:grid;grid-template-columns:7.5rem 1fr;gap:10px;padding:9px 0;border-top:1px solid var(--pp-hair)}
.pp-sumlist>div:first-child{border-top:0}
.pp-sumlist dt{color:var(--pp-ink2);font-weight:600}
.pp-sumlist dd{margin:0;color:var(--pp-ink)}
@media(max-width:420px){.pp-sumlist>div{grid-template-columns:1fr;gap:2px}.pp-opt-in{padding:8px 12px}}

/* ===== Shared home tokens and components (one source for shell, lesson, mock).
   Values copied from home/home.css (lines 5-6, 155-163, 307-308). home.css loads after this file
   and still sets its own identical values, so the home page renders exactly as before.
   Only pp- prefixed classes here: lesson.html already uses .sec/.card/.btn/.score with other meanings. */
@font-face{font-family:Fraunces;font-weight:600;font-display:swap;src:url(fonts/Fraunces.woff2) format("woff2")}

@font-face{font-family:"Patrick Hand";font-weight:400;font-display:swap;src:url(fonts/PatrickHand.woff2) format("woff2")}
:root{--brand:#185fa5;--brand-dark:#134e87;--tint:#e6f1fb;--on-brand:#fff;--bg:#fff;--surface:#fff;--muted-bg:#f6f7f9;--ink:#1a1a1a;--ink2:#475467;--soft:#5b6472;--hair:rgba(0,0,0,.09);--line:rgba(0,0,0,.18);--good:#137333;--good-tint:#e7f6ec;--bad:#b42318;--bad-tint:#fdecea;--warn:#8a4b00;--shadow:0 1px 2px rgba(16,24,40,.05),0 8px 24px rgba(16,24,40,.07);--frame:#c9d0d9;--frame-in:#aab3bf;--boardbg:#fcfcfa;--head:Fraunces,Georgia,serif;--body:Inter,system-ui,-apple-system,sans-serif;--hand:"Patrick Hand","Comic Sans MS",cursive;--r:12px;
 --band:#e9f2fc;--deep:#0f2e4f;--deep2:#17406b;--hero1:#d6e8fa;--brand-text:#185fa5;
 --pp-r-card:20px;--pp-r-btn:14px;--pp-card-shadow:0 2px 4px rgba(16,24,40,.06),0 18px 48px rgba(16,24,40,.12);
 --pp-h1:600 clamp(2.4rem,1.2rem + 4.6vw,4.6rem)/1.04 var(--head);--pp-h2:600 clamp(2rem,1.3rem + 2.4vw,3.2rem)/1.08 var(--head);--pp-h1-app:600 clamp(26px,2vw + 18px,36px)/1.15 var(--head);
 /* aliases for the names lesson.html and mock.html use */
 --background:var(--bg);--surface-muted:var(--muted-bg);--ink-muted:var(--ink2);--ink-soft:var(--soft);--hairline:var(--hair);--border-strong:var(--line);--brand-tint:var(--tint);--warn-tint:var(--tint);--r-card:20px;--r-btn:14px}
@media(prefers-color-scheme:dark){:root{--brand:#6fa8dc;--brand-dark:#9ec5ed;--tint:#1c3a5e;--on-brand:#0a0b0d;--bg:#0a0b0d;--surface:#14161a;--muted-bg:#0f1114;--ink:#f5f6f7;--ink2:#c1c7d0;--soft:#9aa3b0;--hair:rgba(255,255,255,.09);--line:rgba(255,255,255,.22);--good:#4ade80;--good-tint:#12301f;--bad:#ff8a80;--bad-tint:#3a1a18;--warn:#f0c070;--shadow:none;--frame:#3a414c;--frame-in:#2a3038;--boardbg:#f4f3ee;
 --band:#10233a;--deep:#0b1c30;--deep2:#12304f;--hero1:#10294a;--brand-text:#9ec5ed}}
.pp-eyebrow{font:700 13px var(--body);letter-spacing:.12em;text-transform:uppercase;color:var(--brand)}
.pp-h1{font:var(--pp-h1);letter-spacing:-.02em;text-wrap:balance}
.pp-h2{font:var(--pp-h2);letter-spacing:-.015em}
/* page top: the home hero gradient (pale blue fading to the page colour), full width */
.pp-herobg{background:linear-gradient(180deg,var(--hero1) 0,var(--bg) 520px) no-repeat,var(--bg)}
.pp-hero{position:relative;border-image:linear-gradient(180deg,var(--hero1),var(--bg)) fill 0//0 100vmax}
/* full-width colour band, no horizontal scroll (border-image outset is paint only) */
.pp-band{border-image:linear-gradient(var(--band),var(--band)) fill 0//0 100vmax;padding-block:clamp(36px,6vw,72px)}
.pp-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--pp-r-card);box-shadow:var(--pp-card-shadow);padding:clamp(18px,3vw,32px)}
.pp-btn{min-height:54px;padding:0 28px;border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:var(--pp-r-btn);font:600 17px var(--body);display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;text-decoration:none}
.pp-btn.primary{background:var(--brand);border-color:var(--brand);color:var(--on-brand)}.pp-btn.primary:hover{background:var(--brand-dark)}
/* icon + short title + one line (the home "Inside Full course" icon style) */
.pp-feats{list-style:none;margin:0;padding:0;display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(min(100%,230px),1fr))}
.pp-feats li{display:grid;grid-template-columns:auto minmax(0,1fr);gap:4px 14px;align-items:start;padding:18px;border:1.5px solid var(--hair);border-radius:18px;background:var(--surface)}
.pp-feats .pp-ico{grid-row:span 2}
.pp-feats b{font:600 17px/1.3 var(--body);color:var(--ink)}
.pp-feats span{font-size:15px;line-height:1.45;color:var(--ink2)}
.pp-ico{width:44px;height:44px;color:var(--brand);display:block}.pp-ico svg{width:100%;height:100%;overflow:visible}
/* review schedule dots (the home 1-3-7-14-30 track, static) */
.pp-track{display:grid;grid-template-columns:repeat(5,1fr);position:relative;margin:4px 0 0;padding:0;list-style:none}
.pp-track::before{content:"";position:absolute;left:10%;right:10%;top:13px;height:3px;background:var(--hair);border-radius:3px}
.pp-track li{display:grid;justify-items:center;gap:6px;position:relative;font:600 13px var(--body);color:var(--ink2)}
.pp-track i{width:28px;height:28px;border-radius:50%;border:2px solid var(--line);background:var(--surface);display:block}
.pp-track li.on i{background:var(--brand);border-color:var(--brand)}
.pp-track li.on{color:var(--ink)}
.pp-trackbox{margin:0 0 14px;padding:18px 12px 14px;border-radius:18px;background:var(--band)}
.pp-run li i{animation:pp-step 6s infinite}
.pp-run li:nth-child(2) i{animation-delay:1s}.pp-run li:nth-child(3) i{animation-delay:2s}.pp-run li:nth-child(4) i{animation-delay:3s}.pp-run li:nth-child(5) i{animation-delay:4s}
@keyframes pp-step{0%,8%{background:var(--surface);border-color:var(--line)}14%,80%{background:var(--brand);border-color:var(--brand)}92%,100%{background:var(--surface);border-color:var(--line)}}
@media(prefers-reduced-motion:reduce){.pp-run li i{animation:none}}
.pp-dots2{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0 4px}.pp-dots2 i{width:26px;height:26px;border-radius:50%;background:var(--good);display:block}.pp-dots2 i.x{background:var(--bad)}
.pp-pbar{height:10px;border-radius:99px;background:var(--hair);overflow:hidden}.pp-pbar>i{display:block;height:100%;background:var(--brand);border-radius:99px;transition:width .6s cubic-bezier(.2,.8,.2,1)}
/* automatic renewal consent, receipt print view */
.pp-sheet .pp-fixed{margin:14px 0;padding:10px 12px;border:1px solid var(--pp-hair);border-radius:12px;font-size:15px}
.pp-sheet .pp-renew{border:1.5px solid var(--pp-brand);border-radius:12px;padding:12px;font-size:15px;color:var(--pp-ink);font-weight:600}
.pp-sheet h3{font:600 16px Inter,system-ui,sans-serif;margin:14px 0 4px}
.pp-fine{font-size:13px;color:var(--pp-soft)}
.pp-sheet [hidden]{display:none!important}
@media print{body.pp-printing>*:not(.pp-over){display:none!important}body.pp-printing .pp-over{display:block!important;position:static;background:none;padding:0}body.pp-printing .pp-sheet{max-height:none;overflow:visible;box-shadow:none;border:0;max-width:none;padding:0}body.pp-printing .noprint{display:none!important}}
/* ===== QA fix pass (2026-10-18): footer disclaimer + links, receipts, consent hint, account chip ===== */
.pp-foot .pp-disc{flex-basis:100%;margin:0 0 4px;color:var(--pp-ink2)}
.pp-foot .pp-flinks{display:inline-flex;flex-wrap:wrap;gap:0 14px}
.pp-foot a{color:var(--pp-brand-t);min-height:44px;display:inline-flex;align-items:center;text-underline-offset:3px}
.pp-sheet .pp-ckhint{display:block;margin-top:4px;font-size:13px;font-weight:400;color:var(--pp-ink2)}
.pp-sheet .pp-fine{font-size:12.5px;color:var(--pp-soft)}
.pp-sheet a{color:var(--pp-brand-t)}
.pp-sumlist dd{overflow-wrap:anywhere;min-width:0}
.pp-sheet summary{min-height:44px;display:flex;align-items:center;cursor:pointer}
.pp-acct>button span.t{min-width:2.5em}
@media(min-width:1200px){.pp-acct>button{max-width:300px}}
.pp-acct>button{overflow:hidden}
@media(max-width:420px){.pp-acct>button .pp-chip{display:none}.pp-acct>button span.t{max-width:110px}}
/* 701-1100 px: the links take their own row from the first paint, so the font swap cannot wrap them later (home CLS 0.63 at 1024, pre-existing) */
@media(min-width:701px) and (max-width:1100px){.pp-links{order:3;flex-basis:100%}}

/* worked solutions (calc items), number cards, checkpoints: 2026-10-23 */
.pp-steps{margin:10px 0 0;padding:10px 14px;border-left:3px solid var(--pp-brand,#185fa5);background:var(--pp-tint,#eef4fb);border-radius:8px;font-size:14.5px;text-align:left}.pp-steps ol{margin:6px 0 0;padding-left:1.3em}.pp-steps li{margin:3px 0}
.pp-card{max-width:620px;margin:0 auto;padding:26px 24px;border:1px solid var(--pp-line,#d0d5dd);border-radius:18px;background:var(--pp-surface,#fff);box-shadow:0 6px 22px rgba(16,24,40,.06)}.pp-card .front{font-size:1.25rem;font-weight:600;line-height:1.4}.pp-card .back{margin-top:16px;padding-top:14px;border-top:1px solid var(--pp-line,#d0d5dd);font-size:1.1rem}

/* loading skeleton: a view container is empty until its page has rendered; show a calm shimmer instead of a blank page */
.view:empty:not([hidden])::before{content:"";display:block;max-width:960px;height:min(520px,70vh);margin:24px auto;border-radius:20px;
 background:
  linear-gradient(rgba(24,95,165,.16),rgba(24,95,165,.16)) 0 0/38% 28px no-repeat,
  linear-gradient(rgba(24,95,165,.09),rgba(24,95,165,.09)) 0 56px/100% 120px no-repeat,
  linear-gradient(rgba(24,95,165,.09),rgba(24,95,165,.09)) 0 196px/32% 150px no-repeat,
  linear-gradient(rgba(24,95,165,.09),rgba(24,95,165,.09)) 50% 196px/32% 150px no-repeat,
  linear-gradient(rgba(24,95,165,.09),rgba(24,95,165,.09)) 100% 196px/32% 150px no-repeat;
 -webkit-mask:linear-gradient(100deg,#000 40%,rgba(0,0,0,.45) 50%,#000 60%) 100% 0/250% 100%;mask:linear-gradient(100deg,#000 40%,rgba(0,0,0,.45) 50%,#000 60%) 100% 0/250% 100%;
 animation:ppShimmer 1.4s ease-in-out infinite}
@keyframes ppShimmer{to{-webkit-mask-position:0 0;mask-position:0 0}}
@media (max-width:640px){.view:empty:not([hidden])::before{margin:16px;background-size:60% 24px,100% 110px,100% 0,100% 0,100% 0}}
@media (prefers-reduced-motion:reduce){.view:empty:not([hidden])::before{animation:none}}

/*PLAYER-EXT*/
/* player fields: only in a course whose content uses them */
.xpanel{display:grid;gap:10px;padding:14px 16px;min-width:0;align-self:start}
.xpanel.ask{border:2px dashed var(--brand)}
.xpanel h2{font-size:21px;margin:0}.xpanel h3{font-size:17px;margin:0}.xpanel p{margin:0}
.xpanel .stem{font-size:17px;font-weight:600;line-height:1.4;color:var(--ink)}
.xpanel .eyebrow{margin:0}
.xrow{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.xlab{font:600 14px Inter,sans-serif;color:var(--brand-dark,var(--brand))}
.xans{display:flex;flex-wrap:wrap;gap:8px;align-items:center}.xans label{font-weight:600;font-size:15px}
.xnum{font:600 18px Inter,sans-serif;min-height:44px;width:140px;max-width:100%;padding:0 10px;border:1.5px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink)}
.xbad{font-size:14px;color:var(--bad)}
.xmodes-row{display:flex;flex-wrap:wrap;gap:6px 12px;align-items:center;margin-top:8px}
.xmodes{display:flex;border:1.5px solid var(--line);border-radius:12px;overflow:hidden;width:max-content;max-width:100%}
.xmodes button{min-height:44px;padding:0 18px;font:600 15px Inter,sans-serif;color:var(--ink);background:transparent;border:0;cursor:pointer}
.xmodes button[aria-pressed=true]{background:var(--brand);color:var(--on-brand)}
.xmodes button[disabled]{opacity:.55;cursor:not-allowed}
.xhow{flex:1 1 220px;margin:0;font-size:14px;line-height:1.4;color:var(--ink2)}
.xstep{display:grid;gap:6px;padding:8px 10px;border:2px solid transparent;border-radius:10px;color:var(--ink)}
.xstep.now{border-color:var(--brand)}.xstep.bad{border-color:var(--bad)}.xstep.lock{color:var(--soft)}.xstep.ok{background:var(--good-tint)}
.xlab2{display:flex;flex-wrap:wrap;gap:4px 10px;align-items:center;font-weight:600}
.xcount{font:600 15px Inter,sans-serif;margin:0 0 8px}
.caption.xjump{background:rgba(255,214,0,.28);border-left:4px solid var(--brand);padding:6px 10px;border-radius:0 8px 8px 0}
/* read mode: the board is the button; the dock is one primary action */
body.x-read .board{cursor:pointer}
body.x-read:not(.x-listen) #play,body.x-read .dock .scrub,body.x-read:not(.x-listen) #speed,body.x-read #cc{display:none}
.xauto{display:inline-flex;align-items:center;gap:8px;min-height:44px;font-size:14px;color:var(--ink2)}.xauto input{width:20px;height:20px}
html body.x-on .rmnote{display:none}
body.x-read #vnote,body.x-read #vlive,body.x-read #vbuf{display:none}
@media(max-width:560px){body.x-on #lhead .steps{display:none}}
/* test-out: the questions are the page */
body.x-testing .stage,body.x-testing #cap,body.x-testing .dock,body.x-testing .segs,body.x-testing .meta2,body.x-testing .xmodes-row{display:none}
/* a figure on a board: light paper in both themes, big enough to read on a phone */
.item.k-fig{margin:.1em 0 .4em}
.fig{min-width:0}.fig svg{display:block;width:100%;max-width:600px;height:auto;margin:0 auto;overflow:visible}
.fig text{font-family:var(--hand);font-size:22px;fill:#1c2230}
.fig .t-red{fill:#c42027}.fig .t-blu{fill:#1749b8}
.fig path{stroke-linecap:round;stroke-linejoin:round}
.fig .ld{fill:none;stroke:#5b6474;stroke-width:1.6}
.fig .m{fill:#f0d9ae;stroke:#7d5526;stroke-width:1.6}.fig .m2{fill:#e6c489;stroke:#7d5526;stroke-width:1.6}
.fig .ln{fill:none;stroke:#1c2230;stroke-width:2.4}.fig .wall{fill:#1c2230;stroke:#1c2230;stroke-width:1.6}
.fig .dim{fill:none;stroke:#c42027;stroke-width:2.2}.fig .load{fill:none;stroke:#c42027;stroke-width:3.2}
.fig .dash{fill:none;stroke:#1749b8;stroke-width:2.2;stroke-dasharray:7 6}
.fig .pcap{color:#2b3340;border-color:#d5dae1}
/* a drawing sheet on a question */
.xsr{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.xzoom[hidden]{display:none}
.xqfig{display:grid;gap:8px;margin:0 0 12px;min-width:0}
.paper{background:#fcfcfa;border:1px solid #aab3bf;border-radius:8px;padding:4px;color:#1c2230;min-width:0}
.paper svg{display:block;width:100%;max-width:600px;height:auto;margin:0 auto;overflow:visible}
.paper text{font-family:Inter,sans-serif;font-size:21px;fill:#1c2230}
.paper .b{font-weight:600}.paper .dimt{fill:#b02a16;font-weight:600}
.paper .wl{fill:#1c2230;stroke:none}.paper .thin{fill:none;stroke:#1c2230;stroke-width:1.6}
.paper .dl{fill:none;stroke:#b02a16;stroke-width:1.6}.paper .hatch{fill:url(#xh1);stroke:#5b6474;stroke-width:1.4}
.paper .ld{fill:none;stroke:#5b6474;stroke-width:1.5}.paper .wood{fill:#f0d9ae;stroke:#7d5526;stroke-width:1.4}
.paper .conc{fill:#dfe3e8;stroke:#5b6474;stroke-width:1.4}.paper .soil{fill:url(#xh2);stroke:none}
.paper .ins{fill:url(#xh3);stroke:#5b6474;stroke-width:1}.paper .gyp{fill:#fff;stroke:#1c2230;stroke-width:1.4}
.paper .stuc{fill:#cfd4db;stroke:#5b6474;stroke-width:1.4}
.paper .hlz{fill:rgba(255,214,0,.32);stroke:#1c2230;stroke-width:3;stroke-dasharray:9 5}
.paper .hot{fill:transparent;stroke:none;cursor:pointer}
.paper .hot:hover,.paper .hot:focus-visible{fill:rgba(23,73,184,.12);stroke:#1749b8;stroke-width:2;stroke-dasharray:5 4;outline:none}
.pcap{font:500 14px/1.4 Inter,sans-serif;color:#2b3340;border-top:1px solid #d5dae1;margin-top:4px;padding:6px 6px 4px;display:flex;flex-wrap:wrap;gap:2px 12px;justify-content:space-between;align-items:center}
.pcap a{color:#134e87;min-height:44px;display:inline-flex;align-items:center;font-weight:600}
.sched{width:100%;border-collapse:collapse;font-size:14px;line-height:1.3;margin:0;color:#1c2230}
.sched caption{text-align:left;font-weight:600;padding:2px 0 6px}
.sched th,.sched td{border:1px solid #8f98a6;padding:6px;text-align:left}.sched th{background:#e8ebef}
.sched tr.hit td{background:rgba(255,214,0,.5);outline:2px dashed #1c2230;outline-offset:-2px}
/* full sheet */
html.xlopen{overflow:hidden}
.xlight{position:fixed;inset:0;z-index:1000;display:flex;flex-direction:column;background:rgba(10,11,13,.92)}
.xlbar{display:flex;gap:10px;align-items:center;justify-content:space-between;padding:8px 12px;color:#f5f6f7;font-size:14px;background:#14161a}
.xlbody{flex:1;overflow:auto;padding:8px;background:#fcfcfa}
.xlbody img{display:block;width:100%;height:auto;max-width:none;cursor:zoom-in}
.xlbody img.big{width:220%;cursor:zoom-out}
@media(min-width:900px){.xlbody img{width:auto;max-width:100%;margin:0 auto}.xlbody img.big{max-width:none;width:200%}}
/* a phone: the drawing takes the card's padding, so labels stay at 14 px or more */
@media(max-width:560px){.qcard .xqfig,.xpanel .xqfig{margin-left:-14px;margin-right:-14px}.qcard .paper,.xpanel .paper{padding:2px}}
/* the ring on a number is wider than the number: leave it room */
body.x-on .m-circle{margin:0 .46em}
/* a phone: one row of controls, no empty caption lines, so the board, caption and controls share a screen */
@media(max-width:560px){body.x-on .dock .lb.mini{padding:0 6px;min-width:40px}body.x-on .dock .lb.primary{flex:1}body.x-on .dock{flex-wrap:wrap;gap:6px}body.x-on .caption{min-height:0}body.x-on .lmain{gap:6px}body.x-on .sheet{padding-bottom:14px}body.x-on .dock .more{margin-left:0}}
/* whole-course tiles */
.pp-links a[hidden]{display:none!important}
/* the way out of the app: a labelled Marketplace link, the course menu (name and caret), breadcrumbs from the Marketplace */
.xmkt{display:inline-flex;align-items:center;gap:5px;min-height:44px;padding:0 10px;margin:0 2px 0 4px;border-radius:10px;font:600 14px var(--font-ui,Inter,sans-serif);color:var(--ink,#1a2433);text-decoration:none;white-space:nowrap;flex:none}
.xmkt span{font-size:20px;line-height:1;margin-top:-2px}
.xmkt:hover{background:var(--tint,#eef3f8)}
.xsw{position:relative;margin:0 10px 0 4px;font-size:14px;flex:0 1 auto;min-width:0}
.xsw>summary{cursor:pointer;list-style:none;min-height:44px;display:flex;align-items:center;gap:7px;padding:0 12px;border:1px solid var(--line2,var(--hair,#d8dde4));border-radius:10px;background:var(--panel,#fff);color:var(--ink,#1a2433);font-weight:600;white-space:nowrap;min-width:0}
.xsw>summary::-webkit-details-marker{display:none}
.xsw>summary::after{content:none!important}   /* shell.html gives every summary a + */
.xsw-t{overflow:hidden;text-overflow:ellipsis;min-width:0}
.xsw-c{flex:none;transition:transform var(--dur-ui,.16s)}
.xsw[open] .xsw-c{transform:rotate(180deg)}
.xsw-pop{position:absolute;left:0;top:calc(100% + 4px);z-index:60;display:flex;flex-direction:column;width:max-content;min-width:280px;max-width:calc(100vw - 16px);background:var(--panel,var(--paper,#fff));color:var(--ink,#1a2433);border:1px solid var(--line2,var(--hair,#d8dde4));border-radius:12px;padding:6px;box-shadow:0 10px 28px rgba(0,0,0,.18)}
.xsw-pop a{display:flex;align-items:center;min-height:44px;padding:0 10px;border-radius:8px;color:inherit;text-decoration:none;font-weight:500}
.xsw-pop a:hover{background:var(--tint,#eef3f8)}
#xHub{font-weight:700}
#xOther{border-top:1px solid var(--line,var(--hair,#d8dde4));margin-top:4px;padding-top:4px}
.xsw-sep{border:0;border-top:1px solid var(--line,var(--hair,#d8dde4));margin:4px 0;height:0}
#xOther{display:flex;flex-direction:column}#xOther[hidden]{display:none}
.xsw-h{margin:0;padding:6px 10px 2px;font-size:12.5px;font-weight:600;color:var(--mute,#5d6775)}
.pp-links .xph{display:none}
.xcrumbs{font-size:14px;color:var(--mute,#5d6775);display:flex;flex-wrap:wrap;gap:2px 6px;align-items:center}
.xcrumbs a{min-height:44px;display:inline-flex;align-items:center;color:inherit;text-decoration:none;padding:0 4px;margin:0 -4px}
.xcrumbs a:hover{color:var(--c-ui,var(--brand-text,#1749b8));text-decoration:underline}
.xcrumbs .sep::before{content:"\203A"}
.xcrumbs [aria-current]{color:var(--ink,#1a2433)}
#xCrumbs{max-width:960px;margin:-10px auto 6px}
@media print{.xcrumbs,.xmkt,.xsw{display:none!important}}
.xout{display:flex;flex-direction:column;border-top:1px solid var(--line,#e6e8e4);margin-top:6px;padding-top:4px}
.xout a{display:flex;align-items:center;min-height:44px;padding:0 4px;color:var(--ink,#1a2433);text-decoration:none;font:500 14px var(--font-ui,Inter,sans-serif)}
.xout a:first-child{font-weight:700}
@media(max-width:600px){
 .xmkt{display:none}
 .xsw{flex:1 1 auto;margin:0 4px}
 .xsw>summary{padding:0 8px;font-size:13px;gap:4px}
 .xsw-pop{position:fixed;left:8px;right:8px;top:56px;min-width:0;max-width:none}
 .pp-links .xph{display:flex;font-weight:700}
 .pp-links .xph-end{border-bottom:1px solid var(--line,#e6e8e4);margin-bottom:4px;padding-bottom:2px}
}
.xgloss{position:static;display:inline-block;margin:0;font-size:13px;flex:none}
.xgloss>summary{cursor:pointer;min-height:44px;display:inline-flex;align-items:center;padding:0 10px;border:1px solid var(--hair,#d8dde4);border-radius:8px}
.xgl-pop{position:absolute;right:0;left:auto;top:calc(100% + 4px);z-index:60;width:min(420px,calc(100vw - 24px));max-height:60vh;overflow:auto;background:var(--panel,#fff);color:var(--ink,#1a2433);border:1px solid var(--line2,#d8dde4);border-radius:10px;padding:10px 12px;box-shadow:0 8px 24px rgba(0,0,0,.14)}
.xgl-pop table{width:100%;border-collapse:collapse}
.xgl-pop th,.xgl-pop td{text-align:left;vertical-align:top;padding:6px 8px 6px 0;border-bottom:1px solid var(--hair,#d8dde4);font-weight:400}
.xgl-pop th{font-weight:600;width:45%;color:inherit}.xgl-pop td{color:inherit}
.xgl-pop small{display:block;margin-top:3px;font-size:12px;opacity:.8}
.xgl-pop .fine{margin:8px 0 0;font-size:12px;opacity:.8}
/* Today: access ended */
.xexpired{margin:0 0 14px;padding:12px 14px;border:1px solid var(--line,#d8dde4);border-left:4px solid var(--bad,#b3261e);border-radius:10px;background:var(--surface,#fff);font-size:15px;line-height:1.45}
.xexpired .link{display:inline-flex;align-items:center;min-height:44px}
/* results page on a phone: a long lesson name wraps instead of pushing the page sideways */
.mi summary .mi-c{white-space:normal;overflow-wrap:anywhere;min-width:0}
@media(max-width:560px){.mi summary{grid-template-columns:minmax(0,1fr)}}
/* a long board title wraps on a phone */
.meta2 .cnt{white-space:normal;flex-wrap:wrap;max-width:100%}.meta2 .where{white-space:normal;overflow-wrap:anywhere}
/* tap targets, these courses only */
.sx-tile a.go{display:inline-flex;align-items:center;min-height:44px}
a.link:not(p *),button.link:not(p *){display:inline-flex;align-items:center;min-height:44px}
.btn,a.btn,button.btn{min-height:44px!important}
.cp-more{min-width:44px;min-height:44px}
#formSel{min-height:44px}
.pp-preview a{display:inline-flex;align-items:center;min-height:44px}
/* a long account name: the name gives way, the bar stays on the page */
@media(max-width:420px){.pp-nav-in{min-width:0}.pp-logo{flex:0 1 auto;min-width:0}.pp-acct{flex:0 1 auto;min-width:0}.pp-acct>button{max-width:96px}.pp-acct>button span.t{max-width:56px}}
#v-cancel a.link,#v-cancel a[href^="mailto"]{display:inline-flex;align-items:center;min-height:44px}
#xSpeedL{display:none}
.xchi{color:var(--c-ui)}   /* chapter icons take the one accent */