/* base reset */
:root{padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
body{margin:0}
img{max-width:100%}
[hidden]{display:none!important}
/* Layout: one tight column on phones; on desktop a split hero with a live whiteboard, then alternating copy/visual rows. Purple is reserved for actions and progress. */
:root{
  --canvas:#F7F7FB; --surface:#FFFFFF; --ink:#222034; --muted:#625E74; --line:#DCD9E7;
  --primary:#6D3CE9; --primary-hover:#5929CB; --primary-base:#4820A9; --primary-soft:#EEE8FF; --primary-text:#6D3CE9; --on-primary:#FFFFFF;
  --success:#16765D; --success-soft:#DDF5EC; --warning:#865A08; --warning-soft:#FFF1CA;
  --error:#B43D4E; --error-soft:#FCE8EC; --info:#2262A4; --info-soft:#E1F1FF;
  --peach:#FFE7DC; --peach-ink:#7A3B1E;
  --band:#222034; --band-ink:#F7F7FB; --band-muted:#BDB8D0; --band-line:#3A3650; --band-accent:#F4B99C;
  --shadow-card:0 8px 24px rgba(34,32,52,.06); --shadow-overlay:0 16px 48px rgba(34,32,52,.16);
  --font-display:"Bricolage Grotesque", ui-rounded, "Trebuchet MS", system-ui, sans-serif;
  --font-body:system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-hand:"Kalam", "Comic Sans MS", cursive;
  --r-small:10px; --r-control:14px; --r-card:24px; --r-hero:32px;
  --ease:cubic-bezier(.2,0,0,1); --ease-enter:cubic-bezier(.16,1,.3,1); --ease-celebrate:cubic-bezier(.2,.8,.25,1.15);
}
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]){
  --canvas:#13111C; --surface:#1C1929; --ink:#EEECF6; --muted:#A7A2BA; --line:#322D46;
  --primary:#6D3CE9; --primary-hover:#7D52EE; --primary-base:#3A1C8C; --primary-soft:#2A2147; --primary-text:#BBA5FA; --on-primary:#FFFFFF;
  --success:#4CC79C; --success-soft:#12302A; --warning:#E9B54A; --warning-soft:#33280F;
  --error:#F08A99; --error-soft:#3A1C22; --info:#7DB5F0; --info-soft:#142A40;
  --peach:#2E211C; --peach-ink:#F4B99C;
  --band:#0B0A11; --band-ink:#EEECF6; --band-muted:#A7A2BA; --band-line:#2A263A; --band-accent:#F4B99C;
  --shadow-card:0 8px 24px rgba(0,0,0,.3); --shadow-overlay:0 16px 48px rgba(0,0,0,.5);
  color-scheme:dark; } }
:root[data-theme="dark"]{
  --canvas:#13111C; --surface:#1C1929; --ink:#EEECF6; --muted:#A7A2BA; --line:#322D46;
  --primary:#6D3CE9; --primary-hover:#7D52EE; --primary-base:#3A1C8C; --primary-soft:#2A2147; --primary-text:#BBA5FA; --on-primary:#FFFFFF;
  --success:#4CC79C; --success-soft:#12302A; --warning:#E9B54A; --warning-soft:#33280F;
  --error:#F08A99; --error-soft:#3A1C22; --info:#7DB5F0; --info-soft:#142A40;
  --peach:#2E211C; --peach-ink:#F4B99C;
  --band:#0B0A11; --band-ink:#EEECF6; --band-muted:#A7A2BA; --band-line:#2A263A; --band-accent:#F4B99C;
  --shadow-card:0 8px 24px rgba(0,0,0,.3); --shadow-overlay:0 16px 48px rgba(0,0,0,.5);
  color-scheme:dark; }

*{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{overflow-x:clip}
body{background:var(--canvas);color:var(--ink);font:16px/1.6 var(--font-body);-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:10;background:var(--canvas)}
.wrap{max-width:1140px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
h1,h2,h3{font-family:var(--font-display);font-weight:700;letter-spacing:-.02em;line-height:1.05;text-wrap:balance;margin:0}
h2{font-size:clamp(30px,4.6vw,48px)}
h3{font-size:20px;letter-spacing:-.01em;line-height:1.2}
p{margin:0}
a{color:var(--primary-text)}
.label{font-size:14.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--primary-text)}
.lede{font-size:clamp(17px,2vw,19px);color:var(--muted);max-width:56ch}
section{padding-block:clamp(64px,9vw,112px)}
:focus-visible{outline:3px solid var(--primary-text);outline-offset:3px;border-radius:6px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* buttons: the system's tactile press */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:0 26px;border:0;border-radius:var(--r-control);
  font:700 17px/1 var(--font-body);cursor:pointer;text-decoration:none;
  transition:transform 120ms var(--ease),box-shadow 120ms var(--ease),background 160ms var(--ease)}
.btn-primary{background:var(--primary);color:var(--on-primary);box-shadow:0 4px 0 var(--primary-base)}
.btn-primary:hover{background:var(--primary-hover)}
.btn-primary:active{transform:translateY(3px);box-shadow:0 1px 0 var(--primary-base)}
.btn-ghost{background:var(--surface);color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--line),0 3px 0 var(--line)}
.btn-ghost:active{transform:translateY(2px);box-shadow:inset 0 0 0 1.5px var(--line)}
.btn svg{width:20px;height:20px}
.btn-sm{min-height:42px;padding:0 16px;font-size:15px}

/* header */
header.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:color-mix(in srgb,var(--canvas) 88%,transparent);backdrop-filter:saturate(1.2);border-bottom:1px solid transparent;transition:border-color 200ms}
header.top.scrolled{border-bottom-color:var(--line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font:800 21px/1 var(--font-display);letter-spacing:-.02em}
.brand svg{width:30px;height:30px}

/* hero */
.hero{padding-block:clamp(36px,6vw,72px) clamp(56px,7vw,88px)}
.hero .wrap{display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center}
.hero .board{margin-bottom:40px}
.hero h1{font-size:clamp(46px,7.4vw,86px);font-weight:800;letter-spacing:-.035em;line-height:.98;margin-top:18px}
.hero h1 .g{color:var(--primary-text)}
.hero .lede{margin-top:0}
.cta-row{display:flex;flex-wrap:wrap;align-items:center;gap:14px 20px;margin-top:30px}
.fine{display:flex;flex-wrap:wrap;gap:6px 14px;margin-top:16px;font-size:15px;color:var(--muted)}
.fine span{display:inline-flex;align-items:center;gap:6px}
.fine svg{width:16px;height:16px;color:var(--success)}
.hero-price{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 10px;margin-top:22px;color:var(--muted);font-size:15px}
.hero-price .hp-now{font:800 28px/1 var(--font-display);letter-spacing:-.03em;color:var(--ink);font-variant-numeric:tabular-nums}
.hero-price s{font-size:16px}
.hero-price .hp-tag{align-self:center;padding:3px 9px;border-radius:999px;background:var(--success-soft);color:var(--success);font-size:13px;font-weight:700}
.hero-price .hp-meta a{color:inherit}

/* whiteboard demo */
.board{position:relative;background:var(--surface);border-radius:var(--r-hero);box-shadow:var(--shadow-overlay),0 0 0 1px var(--line);padding:22px 22px 18px;min-width:0}
.board-top{display:flex;align-items:center;justify-content:space-between;gap:12px}
.chip{display:inline-flex;align-items:center;gap:6px;padding:5px 11px;border-radius:999px;font-size:14px;font-weight:700;background:var(--primary-soft);color:var(--primary-text);white-space:nowrap}
.chip.paused{background:var(--warning-soft);color:var(--warning)}
.chip.done{background:var(--success-soft);color:var(--success)}
.wave{display:inline-flex;gap:3px;align-items:center;height:14px}
.wave i{width:3px;height:100%;border-radius:2px;background:currentColor;transform-origin:center;animation:wv 900ms ease-in-out infinite}
.wave i:nth-child(2){animation-delay:-.2s}.wave i:nth-child(3){animation-delay:-.45s}.wave i:nth-child(4){animation-delay:-.65s}
.chip.paused .wave i{animation:none;transform:scaleY(.25)}
@keyframes wv{0%,100%{transform:scaleY(.3)}50%{transform:scaleY(1)}}
.topic{font-size:14px;color:var(--muted)}
.slate{position:relative;margin-top:16px;border-radius:var(--r-card);background:
  radial-gradient(circle at 1px 1px,var(--line) 1px,transparent 1.5px) 0 0/22px 22px, var(--canvas);
  padding:22px 22px 18px;min-height:258px;overflow:hidden}
.ln{font:700 clamp(24px,3vw,30px)/1.5 var(--font-hand);color:var(--ink);white-space:nowrap;position:relative;width:max-content;max-width:100%}
.ln .n{color:var(--muted);font-weight:400;font-size:.62em;margin-right:12px;font-family:var(--font-body)}
.ln .fix{color:var(--success)}
.ln .bad{position:relative}
.ln .bad::after{content:"";position:absolute;left:-4px;right:-4px;bottom:4px;height:3px;border-radius:3px;background:var(--error);transform-origin:left;transform:scaleX(var(--mark,1));transition:transform 500ms var(--ease)}
.js .ln{clip-path:inset(0 100% 0 0);transition:clip-path 900ms steps(18,end)}
.js .ln.on{clip-path:inset(0 -10px 0 0)}
.js .ln .bad::after{--mark:0}
.js .ln.marked .bad::after{--mark:1}
.balance{position:absolute;right:16px;top:18px;width:120px;opacity:1;transition:opacity 400ms,transform 500ms var(--ease-enter)}
.js .balance{opacity:0;transform:translateY(8px)}
.js .balance.on{opacity:1;transform:none}
.balance svg{width:100%;height:auto;color:var(--info)}
.caption{display:flex;gap:10px;align-items:flex-start;margin-top:14px;min-height:48px;font-size:15px;line-height:1.45}
.caption .who{flex:none;width:28px;height:28px;border-radius:9px;display:grid;place-items:center;background:var(--info-soft);color:var(--info)}
.caption .who svg{width:17px;height:17px}
.caption p{transition:opacity 220ms}
.caption p.swap{opacity:0}
.bubble{position:absolute;left:50%;bottom:16px;transform:translateX(-50%);display:flex;align-items:center;gap:10px;padding:10px 14px 10px 10px;border-radius:16px;
  background:var(--ink);color:var(--canvas);box-shadow:var(--shadow-overlay);font-weight:600;font-size:14.5px;width:max-content;max-width:calc(100% - 24px)}
.bubble .mic{flex:none;width:30px;height:30px;border-radius:50%;background:var(--peach);color:var(--peach-ink);display:grid;place-items:center}
.bubble .mic svg{width:16px;height:16px}
.bubble small{display:block;font-weight:500;font-size:14.5px;opacity:.7}
.js .bubble{opacity:0;transform:translate(-50%,12px) scale(.96);transition:opacity 220ms,transform 320ms var(--ease-celebrate);pointer-events:none}
.js .bubble.on{opacity:1;transform:translate(-50%,0)}
.mastery{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:12px;margin-top:6px;font-size:14px;color:var(--muted)}
.bar{height:10px;border-radius:999px;background:var(--primary-soft);overflow:hidden}
.bar b{display:block;height:100%;width:var(--w,74%);border-radius:inherit;background:var(--primary);transition:width 450ms var(--ease)}
.mastery strong{font-variant-numeric:tabular-nums;color:var(--ink)}
.demo-ctl{position:absolute;right:18px;bottom:-18px;display:flex;gap:8px}
.demo-ctl button{display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 12px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--ink);font:600 14px var(--font-body);cursor:pointer;box-shadow:var(--shadow-card)}
.demo-ctl svg{width:15px;height:15px}

/* proof strip */
.proof{padding-block:0 0}
.proof .card{display:grid;grid-template-columns:auto 1fr;gap:28px 40px;align-items:center;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding-block:36px}
.stat{font:800 clamp(52px,7vw,76px)/1 var(--font-display);letter-spacing:-.04em}
.stat small{display:block;font:500 15px/1.4 var(--font-body);letter-spacing:0;color:var(--muted);margin-top:8px;max-width:22ch}
.split{display:flex;height:44px;border-radius:12px;overflow:hidden;gap:3px}
.split .below{flex:0 0 78.5%;background:var(--error-soft);color:var(--error);display:flex;align-items:center;padding-left:14px;font-weight:700;font-size:14px;white-space:nowrap;overflow:hidden}
.split .above{flex:1;background:var(--success-soft);color:var(--success);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px}
.split-legend{display:flex;justify-content:space-between;gap:12px;margin-top:10px;font-size:14.5px;color:var(--muted);font-variant-numeric:tabular-nums;flex-wrap:wrap}
.split .below{transform-origin:left}
.in .split .below{animation:grow 1100ms var(--ease-enter) both}
@keyframes grow{from{clip-path:inset(0 100% 0 0)}to{clip-path:inset(0 0 0 0)}}

/* compare */
.sec-head{display:grid;gap:16px;max-width:720px}
.compare{display:grid;grid-template-columns:.85fr 1.15fr;gap:20px;margin-top:44px;align-items:start}
.q{font-weight:600;font-size:15.5px}
.q .m{font-family:"Cambria Math","STIX Two Math",serif;font-weight:400;font-size:1.08em}
.pane{border-radius:var(--r-card);padding:24px;min-width:0}
.pane.app{background:transparent;border:1.5px dashed var(--line);color:var(--muted)}
.pane.us{background:var(--surface);box-shadow:var(--shadow-card),0 0 0 1px var(--line)}
.pane-label{font-size:14.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;margin-bottom:14px}
.pane.app .pane-label{color:var(--muted)}
.pane.us .pane-label{color:var(--primary-text)}
.verdict{margin-top:18px;padding:14px 16px;border-radius:var(--r-control);background:var(--error-soft);color:var(--error);font-weight:700;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}
.verdict span{font-weight:500;color:var(--muted)}
.working{margin-top:16px;padding:14px 16px;border-radius:var(--r-control);background:var(--canvas);font:700 22px/1.55 var(--font-hand)}
.working .ok{color:var(--success)}
.working .slip{background:var(--warning-soft);color:var(--warning);border-radius:6px;padding:0 6px}
.feedback{margin-top:14px;display:flex;gap:12px;align-items:flex-start;padding:14px 16px;border-radius:var(--r-control);background:var(--info-soft);color:var(--ink)}
.feedback .ic{flex:none;width:28px;height:28px;border-radius:9px;background:var(--surface);color:var(--info);display:grid;place-items:center}
.feedback .ic svg{width:17px;height:17px}
.next{margin-top:12px;font-size:14px;color:var(--muted);display:flex;align-items:center;gap:8px}
.next b{color:var(--success)}

/* steps + path */
.how{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;margin-top:44px}
ol.steps{list-style:none;margin:0;padding:0;display:grid;gap:4px;counter-reset:s}
ol.steps li{display:grid;grid-template-columns:44px 1fr;gap:16px;padding:16px 0;border-bottom:1px solid var(--line);counter-increment:s}
ol.steps li:last-child{border-bottom:0}
ol.steps li::before{content:counter(s);width:40px;height:40px;border-radius:12px;display:grid;place-items:center;background:var(--primary-soft);color:var(--primary-text);font:800 18px var(--font-display)}
ol.steps h3{margin-bottom:4px}
ol.steps p{color:var(--muted)}
.path{background:var(--surface);border-radius:var(--r-hero);padding:26px;box-shadow:var(--shadow-card),0 0 0 1px var(--line);min-width:0}
.path-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap}
.path-head h3{font-size:22px}
.subjects{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 22px}
.subj{font-size:14px;font-weight:600;padding:6px 11px;border-radius:999px;border:1px solid var(--line);color:var(--muted)}
.subj.cur{border-color:transparent;background:var(--primary-soft);color:var(--primary-text)}
.levels{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.lv{display:grid;grid-template-columns:36px 1fr auto;gap:14px;align-items:center;padding:12px 14px;border-radius:var(--r-control);border:1.5px solid var(--line);background:var(--surface);transition:border-color 300ms,background 300ms}
.lv .dot{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;font:800 15px var(--font-display);border:2px solid var(--line);color:var(--muted)}
.lv .dot svg{width:18px;height:18px}
.lv b{display:block;font-size:15px}
.lv small{color:var(--muted);font-size:14px}
.lv .st{font-size:14px;font-weight:700;color:var(--muted)}
.lv.pass .dot{background:var(--success-soft);border-color:var(--success);color:var(--success)}
.lv.pass .st{color:var(--success)}
.lv.cur{border-color:var(--primary)}
.lv.cur .dot{background:var(--primary);border-color:var(--primary);color:var(--on-primary)}
.lv.cur .st{color:var(--primary-text)}
.lv.lock{background:transparent}
.lv.lock .dot svg{width:15px;height:15px}
.earned{animation:earned 850ms var(--ease-celebrate) both}
@keyframes earned{0%{transform:scale(.88) rotate(-5deg)}55%{transform:scale(1.06) rotate(2deg)}100%{transform:none}}
.path-foot{margin-top:16px;font-size:14.5px;color:var(--muted)}

/* teacher + working */
.duo{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:44px}
.panel{background:var(--surface);border-radius:var(--r-hero);padding:30px;box-shadow:var(--shadow-card),0 0 0 1px var(--line);min-width:0;display:flex;flex-direction:column;gap:14px}
.panel h2{font-size:clamp(28px,3.4vw,38px)}
.panel>p{color:var(--muted)}
.flow{list-style:none;margin:8px 0 0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.flow li{position:relative;padding:12px 10px;border-radius:var(--r-control);background:var(--canvas);font-size:14.5px;font-weight:600;text-align:center}
.flow li svg{display:block;margin:0 auto 6px;width:20px;height:20px;color:var(--info)}
.flow li.hot{background:var(--warning-soft);color:var(--warning)}
.flow li.hot svg{color:var(--warning)}
.convo{display:grid;gap:8px;margin-top:auto}
.convo p{padding:10px 14px;border-radius:14px;font-size:14.5px;max-width:88%}
.convo .you{justify-self:end;background:var(--ink);color:var(--canvas);border-bottom-right-radius:4px}
.convo .ai{background:var(--info-soft);color:var(--ink);border-bottom-left-radius:4px}
.tabs{display:flex;gap:6px;padding:5px;border-radius:16px;background:var(--canvas);width:max-content;max-width:100%}
.tabs button{display:inline-flex;align-items:center;gap:7px;height:40px;padding:0 14px;border:0;border-radius:12px;background:transparent;color:var(--muted);font:600 14.5px var(--font-body);cursor:pointer}
.tabs button svg{width:17px;height:17px}
.tabs button[aria-selected="true"]{background:var(--surface);color:var(--ink);box-shadow:0 1px 0 var(--line),0 0 0 1px var(--line)}
.tabpanel{border-radius:var(--r-card);background:var(--canvas);padding:18px;min-height:150px}
.tabpanel .row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.mathbox{flex:1;min-width:0;padding:12px 14px;border-radius:12px;background:var(--surface);border:1.5px solid var(--primary);font-family:"Cambria Math","STIX Two Math",serif;font-size:20px}
.caret{display:inline-block;width:2px;height:1.1em;background:var(--primary);vertical-align:-3px;margin-left:2px;animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.keys{display:flex;gap:6px;margin-top:10px;flex-wrap:wrap}
.keys span{min-width:38px;height:34px;padding:0 8px;border-radius:9px;background:var(--surface);border:1px solid var(--line);display:grid;place-items:center;font-family:"Cambria Math",serif;font-size:16px}
.paper{padding:14px 16px;border-radius:12px;background:var(--surface);background-image:repeating-linear-gradient(to bottom,transparent 0 31px,var(--line) 31px 32px);font:400 22px/32px var(--font-hand)}
.confirm{margin-top:10px;font-size:14px;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.confirm .pill{padding:4px 10px;border-radius:999px;background:var(--warning-soft);color:var(--warning);font-weight:700;font-size:14px}
.voice{display:flex;align-items:center;gap:12px}
.voice .rec{flex:none;width:44px;height:44px;border-radius:50%;background:var(--peach);color:var(--peach-ink);display:grid;place-items:center}
.voice .rec svg{width:20px;height:20px}
.vwave{display:flex;align-items:center;gap:3px;height:34px;flex:1;min-width:0;overflow:hidden;color:var(--peach-ink)}
.vwave i{flex:none;width:4px;border-radius:2px;background:currentColor;opacity:.75;animation:wv 1.1s ease-in-out infinite}
.transcript{margin-top:12px;font-size:15px;color:var(--muted);font-style:italic}
.small-print{font-size:15.5px;color:var(--muted)}

/* centre band */
.band{overflow:hidden;background:var(--band);color:var(--band-ink);border-radius:clamp(0px,3vw,40px);margin-inline:auto;max-width:1240px}
.band .wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;padding-block:clamp(56px,8vw,96px)}
.band .label{color:var(--band-accent)}
.band h2{color:var(--band-ink);margin-top:12px}
.band .lede{color:var(--band-muted);margin-top:16px}
.facts{list-style:none;margin:28px 0 0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:0}
.facts li{padding:14px 0;border-top:1px solid var(--band-line);display:grid;gap:2px}
.facts li:nth-child(odd){padding-right:16px}
.facts small{color:var(--band-muted);font-size:14px}
.facts b{font-weight:600}
.facts li:last-child:nth-child(odd){grid-column:1/-1}
.device{justify-self:center;width:min(100%,340px);aspect-ratio:3/4;border-radius:32px;background:var(--band-line);padding:12px;position:relative}
.screen{height:100%;border-radius:22px;background:var(--canvas);color:var(--ink);padding:18px;display:flex;flex-direction:column;gap:12px;overflow:hidden}
.screen .bar-top{display:flex;justify-content:space-between;font-size:14.5px;color:var(--muted)}
.screen .only{margin-top:auto;display:flex;align-items:center;gap:10px;padding:12px;border-radius:14px;background:var(--surface);box-shadow:0 0 0 1px var(--line);font-size:14px;color:var(--muted)}
.screen .only svg{flex:none;width:18px;height:18px;color:var(--muted)}
.blocked{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.blocked span{aspect-ratio:1;border-radius:14px;background:var(--line);opacity:.5;position:relative}
.blocked span::after{content:"";position:absolute;inset:44% 18%;height:2px;background:var(--muted);transform:rotate(-35deg);opacity:.7}
.app-tile{display:flex;align-items:center;gap:12px;padding:14px;border-radius:16px;background:var(--primary);color:var(--on-primary);font-weight:700}
.app-tile svg{width:28px;height:28px}
.app-tile small{display:block;font-weight:500;opacity:.85;font-size:14px}

/* parents */
.parents{display:grid;grid-template-columns:.95fr 1.05fr;gap:56px;align-items:center}
.parents .lede{margin-top:16px}
.report{background:var(--surface);border-radius:var(--r-hero);box-shadow:var(--shadow-overlay),0 0 0 1px var(--line);overflow:hidden;min-width:0}
.report-head{display:flex;align-items:center;gap:12px;padding:16px 20px;background:var(--success-soft)}
.report-head .av{width:38px;height:38px;border-radius:12px;background:var(--surface);display:grid;place-items:center}
.report-head .av svg{width:22px;height:22px}
.report-head b{display:block;font-size:15px}
.report-head small{color:var(--muted);font-size:14px}
.report-body{padding:20px;display:grid;gap:14px}
.rrow{display:flex;justify-content:space-between;gap:12px;font-size:15px;padding-bottom:12px;border-bottom:1px solid var(--line);font-variant-numeric:tabular-nums}
.rrow span{color:var(--muted)}
.rrow .up{color:var(--success);font-weight:700}
.status-pill{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;background:var(--success-soft);color:var(--success);font-weight:700;font-size:14px}
.action{padding:14px 16px;border-radius:var(--r-control);background:var(--peach);color:var(--peach-ink)}
.action small{display:block;font-weight:700;font-size:14.5px;letter-spacing:.08em;text-transform:uppercase;margin-bottom:4px}
.action p{color:var(--ink);font-weight:600}
.sample{font-size:14px;color:var(--muted);text-align:right;padding:0 20px 14px}

/* pricing */
.plans{display:grid;grid-template-columns:1.15fr .85fr;gap:20px;margin-top:44px}
.plan{background:var(--surface);border-radius:var(--r-hero);padding:30px;box-shadow:var(--shadow-card),0 0 0 1px var(--line);display:flex;flex-direction:column;gap:18px;min-width:0}
.plan.feat{box-shadow:var(--shadow-card),0 0 0 2px var(--primary)}
.plan-top{display:flex;justify-content:space-between;align-items:center;gap:10px}
.plan h3{font-size:24px}
.price{font:800 44px/1 var(--font-display);letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.price small{font:500 15px var(--font-body);color:var(--muted);letter-spacing:0}
.was{font-size:15px;color:var(--muted)}
.was s{margin-right:6px}
.was b{color:var(--success)}
.plan ul{list-style:none;margin:0;padding:0;display:grid;gap:10px;font-size:15px}
.plan li{display:flex;gap:10px}
.plan li svg{flex:none;width:20px;height:20px;color:var(--success);margin-top:2px}
.plan .btn{margin-top:auto}
.guarantee-note{margin-top:22px;display:flex;align-items:center;gap:10px;color:var(--muted);font-size:15px}
.guarantee-note svg{width:20px;height:20px;color:var(--success)}

/* faq */
.faq-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:56px;align-items:start}
.faq-grid .side{position:sticky;top:96px;display:grid;gap:14px}
.faq-grid .side p{color:var(--muted)}
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:20px 0;font:700 19px/1.3 var(--font-display);letter-spacing:-.01em}
.faq summary::-webkit-details-marker{display:none}
.faq summary .pm{flex:none;width:30px;height:30px;border-radius:10px;background:var(--primary-soft);color:var(--primary-text);display:grid;place-items:center;transition:transform 240ms var(--ease)}
.faq summary .pm svg{width:16px;height:16px}
.faq details[open] .pm{transform:rotate(45deg)}
.faq .a{padding:0 0 22px;color:var(--muted);display:grid;gap:12px;font-size:16.5px}
.faq summary:hover{color:var(--primary-text)}
.faq .a ul{margin:0;padding-left:20px;display:grid;gap:6px}

/* final */
.final{text-align:left}
.final .box{background:var(--primary-soft);border-radius:var(--r-hero);padding:clamp(32px,6vw,64px);display:flex;justify-content:space-between;align-items:center;gap:28px;flex-wrap:wrap}
.final h2{max-width:14ch}
.final p{color:var(--muted);margin-top:12px}
footer{padding-block:36px 48px;color:var(--muted);font-size:15px}
footer .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:24px}
footer .links{display:flex;gap:18px;flex-wrap:wrap}
footer a{color:var(--muted)}

/* sticky mobile cta */
.mcta{display:none}

/* dialog */
dialog{border:0;padding:0;border-radius:var(--r-hero);background:var(--surface);color:var(--ink);width:min(480px,calc(100vw - 24px));box-shadow:var(--shadow-overlay)}
dialog::backdrop{background:rgba(20,17,30,.55)}
dialog[open]{animation:pop 260ms var(--ease-enter)}
@keyframes pop{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.dlg{padding:26px}
.dlg-top{display:flex;justify-content:space-between;align-items:center;gap:10px}
.steps-ind{display:flex;gap:6px;align-items:center;font-size:14px;color:var(--muted);font-weight:600}
.steps-ind i{width:28px;height:6px;border-radius:999px;background:var(--line)}
.steps-ind i.on{background:var(--primary)}
.x{width:40px;height:40px;border-radius:12px;border:0;background:var(--canvas);color:var(--ink);display:grid;place-items:center;cursor:pointer}
.x svg{width:18px;height:18px}
.dlg h2{font-size:28px;margin-top:18px}
.dlg .sub{color:var(--muted);margin-top:8px;font-size:15px}
.fields{display:grid;gap:16px;margin-top:22px}
.field{display:grid;gap:6px}
.field label,.field legend{font-weight:600;font-size:14.5px;padding:0}
fieldset{border:0;margin:0;padding:0;min-width:0}
.field input,.field select{height:50px;border-radius:var(--r-control);border:1.5px solid var(--line);background:var(--surface);color:var(--ink);padding:0 14px;font:16px var(--font-body);width:100%}
.field input:focus,.field select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}
.seg{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:8px;margin-top:6px}
.seg label{position:relative}
.seg input{position:absolute;opacity:0;inset:0;width:100%;height:100%;margin:0;cursor:pointer}
.seg span{display:flex;align-items:center;justify-content:center;min-height:48px;padding:6px 10px;text-align:center;border-radius:var(--r-control);border:1.5px solid var(--line);font-weight:600;font-size:15px;line-height:1.2;transition:border-color 160ms,background 160ms}
.seg input:checked+span{border-color:var(--primary);background:var(--primary-soft);color:var(--primary-text)}
.seg input:focus-visible+span{outline:3px solid var(--primary-text);outline-offset:2px}
.err{color:var(--error);font-size:14.5px;min-height:0}
.field .hint{color:var(--muted);font-size:13.5px}
.field .optional{color:var(--muted);font-weight:500}
.pick{display:grid;gap:8px;margin-top:6px}
.pick label{position:relative}
.pick input{position:absolute;opacity:0;inset:0;width:100%;height:100%;margin:0;cursor:pointer;z-index:1}
.pk{position:relative;display:grid;gap:3px;padding:12px 14px 12px 44px;border-radius:var(--r-control);border:1.5px solid var(--line);transition:border-color 160ms,background 160ms}
.pk::before{content:"";position:absolute;left:14px;top:15px;width:18px;height:18px;border-radius:50%;border:2px solid var(--line);background:var(--surface);box-sizing:border-box;transition:border-color 160ms,box-shadow 160ms}
.pk-top{display:flex;justify-content:space-between;align-items:baseline;gap:10px}
.pk-top b{font-size:15.5px;line-height:1.3}
.pk-price{font:800 20px/1 var(--font-display);letter-spacing:-.02em;font-variant-numeric:tabular-nums;white-space:nowrap}
.pk-sub{display:flex;flex-wrap:wrap;justify-content:space-between;gap:2px 10px;font-size:13.5px;color:var(--muted)}
.pk-g{display:inline-flex;align-items:center;gap:5px;color:var(--success);font-weight:600}
.pk-g svg{width:14px;height:14px}
.pick input:checked+.pk{border-color:var(--primary);background:var(--primary-soft)}
.pick input:checked+.pk::before{border-color:var(--primary);box-shadow:inset 0 0 0 3px var(--surface);background:var(--primary)}
.pick input:focus-visible+.pk{outline:3px solid var(--primary-text);outline-offset:2px}
.dlg .btn{width:100%;margin-top:22px}
.dlg .tiny{font-size:14px;color:var(--muted);margin-top:12px;text-align:center}
.done-ic{width:64px;height:64px;border-radius:20px;background:var(--success-soft);color:var(--success);display:grid;place-items:center;margin-top:10px}
.done-ic svg{width:32px;height:32px}
.back{background:none;border:0;color:var(--muted);font:600 14px var(--font-body);cursor:pointer;margin-top:12px;width:100%}
.dep-list{list-style:none;padding:0;margin:18px 0 0;display:grid;gap:10px}
.dep-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;line-height:1.4}
.dep-list svg{flex:none;width:20px;height:20px;margin-top:1px;color:var(--success)}
.dlg .btn:disabled{opacity:.6;cursor:wait}
.pay-amt{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:20px;padding:16px 18px;border-radius:var(--r-control);background:var(--primary-soft);color:var(--ink)}
.pay-amt span{font-weight:700;font-size:15px}
.pay-amt b{font:800 28px/1 var(--font-display);letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.pay-rows{margin:8px 0 0;padding:0}
.pay-rows>div{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:6px 12px;min-height:52px;padding:8px 0;border-bottom:1px dashed var(--line)}
.pay-rows>div:last-child{border-bottom:0}
.pay-rows dt{color:var(--muted);font-size:14.5px;white-space:nowrap}
.pay-rows dd{margin:0 0 0 auto;display:flex;align-items:center;gap:10px;font-weight:700;text-align:right;font-size:15.5px}
.pay-steps b{white-space:nowrap}
.pay-num{font:800 22px/1 var(--font-display);color:var(--primary-text);letter-spacing:.01em;font-variant-numeric:tabular-nums}
.pay-ref{font-variant-numeric:tabular-nums;letter-spacing:.02em}
.copy{border:0;border-radius:999px;padding:7px 14px;background:var(--primary-soft);color:var(--primary-text);font:700 13.5px var(--font-body);cursor:pointer;min-width:64px}
.copy.ok{background:var(--success-soft);color:var(--success)}
.pay-steps{list-style:none;counter-reset:ps;padding:0;margin:14px 0 0;display:grid;gap:12px}
.pay-steps li{counter-increment:ps;position:relative;padding-left:42px;min-height:30px;font-size:15px;line-height:1.45}
.pay-steps li::before{content:counter(ps);position:absolute;left:0;top:-2px;width:30px;height:30px;border-radius:50%;background:var(--primary);color:var(--on-primary);display:grid;place-items:center;font:800 14px var(--font-display)}
.dlg .btn-wa{display:flex;align-items:center;justify-content:center;gap:10px;background:#25D366;color:#0B2E17;font-weight:800;font-size:16px;white-space:nowrap;text-decoration:none;border:0}
.dlg .btn-wa:hover{background:#1FBF5B}
.btn-wa svg{width:22px;height:22px}

@media (max-width:920px){
  .hero .wrap,.how,.band .wrap,.parents,.compare,.duo{grid-template-columns:1fr}
  .hero .wrap{gap:44px}
  .band .wrap{gap:40px}
  .parents{gap:36px}
}
@media (max-width:640px){
  .proof .card{grid-template-columns:1fr;gap:20px}
  .plans{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr 1fr}
  .facts{grid-template-columns:1fr}
  .facts li:nth-child(odd){padding-right:0}
  .top .btn-sm{display:none}
  .board{padding:16px 14px 14px}
  .slate{padding:16px 14px;min-height:240px}
  .balance{width:88px;right:10px;top:12px}
  .mcta{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:30;padding:10px max(16px,env(safe-area-inset-right,0px)) calc(10px + env(safe-area-inset-bottom,0px)) max(16px,env(safe-area-inset-left,0px));background:color-mix(in srgb,var(--canvas) 92%,transparent);border-top:1px solid var(--line);transform:translateY(110%);transition:transform 240ms var(--ease)}
  .mcta.show{transform:none}
  .mcta .btn{width:100%}
  footer{padding-bottom:110px}
  .demo-ctl{right:12px}
  .tabs button{padding:0 10px}
}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* hero guarantee tag */
.gwrap{position:relative;display:inline-block}
.tag{position:absolute;right:-14px;bottom:-26px;transform:rotate(-6deg);display:inline-flex;align-items:center;gap:8px;padding:9px 16px 9px 12px;border-radius:12px;background:var(--success);color:#fff;font:700 clamp(15px,1.7vw,19px)/1 var(--font-body);letter-spacing:0;white-space:nowrap;box-shadow:0 4px 0 color-mix(in srgb,var(--success) 60%,#000),var(--shadow-card)}
.tag svg{width:18px;height:18px}
.reveal-ready .tag{animation:slap 700ms var(--ease-celebrate) 900ms both}
@keyframes slap{0%{opacity:0;transform:rotate(-18deg) scale(1.6)}60%{opacity:1;transform:rotate(-4deg) scale(.96)}100%{opacity:1;transform:rotate(-6deg) scale(1)}}
.hero h1{margin-bottom:58px}
.fine .note{display:block;width:100%}
:root[data-theme="dark"] .tag,.tag{color:#fff}
/* did you know */
.dyk{display:grid;grid-template-columns:.9fr 1.1fr;gap:28px 56px;align-items:center;border-radius:var(--r-hero);background:var(--surface);box-shadow:var(--shadow-card),0 0 0 1px var(--line);padding:clamp(24px,4vw,44px)}
.dyk .q-label{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:15px;color:var(--warning);background:var(--warning-soft);padding:6px 12px;border-radius:999px;width:max-content}
.dyk .q-label svg{width:17px;height:17px}
.dyk h2{font-size:clamp(28px,3.6vw,40px);margin-top:14px}
.dyk h2 .hl{color:var(--error)}
.dyk .src{margin-top:12px;color:var(--muted);font-size:15px}
.dyk .then{margin-top:18px;font-weight:600;font-size:17px}
.people{display:grid;grid-template-columns:repeat(10,1fr);gap:8px}
.people span{aspect-ratio:3/4;border-radius:999px 999px 10px 10px;background:var(--error-soft);position:relative}
.people span::before{content:"";position:absolute;left:50%;top:10%;width:46%;aspect-ratio:1;border-radius:50%;transform:translateX(-50%);background:color-mix(in srgb,var(--error) 40%,transparent)}
.people span.ok{background:var(--success-soft)}
.people span.ok::before{background:var(--success)}
.people-key{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px 16px;margin-top:14px;font-size:15px;color:var(--muted);font-variant-numeric:tabular-nums}
.people-key b{color:var(--ink)}
.reveal-ready .people span{opacity:0;transform:translateY(10px) scale(.9);transition:opacity 400ms var(--ease-enter),transform 500ms var(--ease-enter);transition-delay:calc(var(--i)*35ms)}
.reveal-ready .people.in span{opacity:1;transform:none}
/* centre timeline */
.day{list-style:none;margin:26px 0 0;padding:0;display:grid;gap:0;border-left:2px solid var(--band-line);margin-left:6px}
.day li{position:relative;padding:0 0 18px 22px;color:var(--band-muted);font-size:16px}
.day li::before{content:"";position:absolute;left:-7px;top:6px;width:12px;height:12px;border-radius:50%;background:var(--band);border:2px solid var(--band-accent)}
.day b{color:var(--band-ink);font-variant-numeric:tabular-nums;margin-right:8px}
.rec{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:999px;background:var(--band-accent);color:#3A1A0C;font-weight:700;font-size:14px}
.rec svg{width:16px;height:16px}
.band-cta{display:flex;flex-wrap:wrap;gap:14px 20px;align-items:center;margin-top:28px}
.band-cta .g{display:inline-flex;align-items:center;gap:8px;color:var(--band-ink);font-weight:600;font-size:15.5px}
.band-cta .g svg{width:20px;height:20px;color:var(--band-accent)}
/* plans */
.plan .gline{display:flex;align-items:center;gap:10px;padding:12px 14px;border-radius:var(--r-control);background:var(--success-soft);color:var(--success);font-weight:700;font-size:15.5px}
.plan .gline svg{width:20px;height:20px;flex:none}
.plan .nog{display:flex;align-items:center;gap:10px;padding:12px 14px;border-radius:var(--r-control);background:var(--canvas);color:var(--muted);font-size:15px}
.plan li.x svg{color:var(--muted)}
.plan li.x{color:var(--muted)}
/* scroll progress */
.progress{position:fixed;left:0;right:0;top:env(safe-area-inset-top,0px);height:3px;z-index:40;background:transparent;pointer-events:none}
.progress b{display:block;height:100%;width:100%;background:var(--primary);transform-origin:left;transform:scaleX(var(--p,0))}
/* entrance animations */
.reveal-ready [data-r]{opacity:0;transform:translateY(28px);transition:opacity 700ms var(--ease-enter),transform 800ms var(--ease-enter);transition-delay:calc(var(--d,0)*90ms)}
.reveal-ready [data-r="left"]{transform:translateX(-32px)}
.reveal-ready [data-r="right"]{transform:translateX(32px)}
.reveal-ready [data-r="zoom"]{transform:scale(.94) translateY(16px)}
.reveal-ready [data-r].in{opacity:1;transform:none}
.hero-in [data-h]{opacity:0;transform:translateY(22px);animation:rise 800ms var(--ease-enter) both;animation-delay:calc(var(--d,0)*110ms)}
@keyframes rise{to{opacity:1;transform:none}}
.board{will-change:transform}
/* hover */
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 0 var(--primary-base),0 10px 24px color-mix(in srgb,var(--primary) 35%,transparent)}
.btn-ghost:hover{transform:translateY(-2px);box-shadow:inset 0 0 0 1.5px var(--primary),0 5px 0 var(--line)}
.btn svg{transition:transform 200ms var(--ease)}
.btn:hover svg{transform:translateX(4px)}
.plan,.pane.us,.panel,.path,.report{transition:transform 300ms var(--ease),box-shadow 300ms var(--ease)}
.plan:hover,.pane.us:hover,.panel:hover,.path:hover,.report:hover{transform:translateY(-4px)}
.lv{transition:transform 200ms var(--ease),border-color 300ms,background 300ms}
.lv:hover{transform:translateX(4px)}
.flow li{transition:transform 200ms var(--ease)}
.flow li:hover{transform:translateY(-3px)}
@media (max-width:920px){ .dyk,.faq-grid{grid-template-columns:1fr} .faq-grid{gap:20px} .faq-grid .side{position:static} .plans{grid-template-columns:1fr} }
@media (max-width:640px){ .tag{right:auto;left:0;bottom:-30px} .people{gap:5px} body{font-size:16.5px} }
@media (prefers-reduced-motion: reduce){ .reveal-ready [data-r],.hero-in [data-h],.reveal-ready .people span{opacity:1!important;transform:none!important} }

/* ===== real lesson player ===== */
.lesson-sec .sec-head{margin-inline:auto;text-align:center;justify-items:center}
.lp-tabs{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:32px}
.lp-tabs button{display:grid;text-align:left;gap:2px;padding:12px 18px;border-radius:16px;border:1.5px solid var(--line);background:var(--surface);color:var(--ink);font:700 16px/1.2 var(--font-body);cursor:pointer;transition:border-color 160ms,background 160ms,transform 200ms var(--ease)}
.lp-tabs button small{font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.lp-tabs button:hover{transform:translateY(-2px)}
.lp-tabs button[aria-selected="true"]{border-color:var(--primary);background:var(--primary-soft)}
.lp-tabs button[aria-selected="true"] small{color:var(--primary-text)}
.lp-win{margin-top:22px;background:var(--surface);border-radius:var(--r-hero);box-shadow:var(--shadow-overlay),0 0 0 1px var(--line);overflow:hidden}
.lp-bar{display:flex;align-items:center;gap:8px;padding:12px 18px;border-bottom:1px solid var(--line);font-size:14px;color:var(--muted)}
.lp-bar i{width:11px;height:11px;border-radius:50%;background:var(--line)}
.lp-bar span{margin-left:8px}
.lp-q{padding:18px 22px 0;font-weight:600;font-size:16.5px;max-width:80ch}
.lp-q small{display:block;font-size:13.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--primary-text);margin-bottom:6px}
.lp-body{display:grid;grid-template-columns:1fr;gap:16px;padding:16px 22px 0}
.lp-body.with-side{grid-template-columns:1.25fr .75fr}
.lp-board{position:relative;height:340px;overflow:hidden;border-radius:var(--r-card);background:radial-gradient(circle at 1px 1px,var(--line) 1px,transparent 1.5px) 0 0/22px 22px,var(--canvas);padding:18px 22px;scroll-behavior:smooth}
.lp-lines{display:grid;gap:4px}
.lp-line{font:700 clamp(19px,2.3vw,25px)/1.45 var(--font-hand);color:var(--ink);width:max-content;max-width:100%;white-space:normal}
.lp-line.ans{background:var(--success-soft);color:var(--success);padding:2px 12px;border-radius:10px}
.lp-line.new{animation:write 900ms steps(20,end) both}
@keyframes write{from{clip-path:inset(0 100% 0 0)}to{clip-path:inset(0 -10px 0 0)}}
.lp-empty{color:var(--muted);font-size:15px}
.lp-side{min-width:0;border-radius:var(--r-card);background:var(--canvas);padding:16px;display:flex;align-items:center;justify-content:center}
.lp-side svg{width:100%;max-width:300px;height:auto;color:var(--ink)}
.lp-side .pass{font-size:15px;line-height:1.6;color:var(--ink);align-self:flex-start;max-height:308px;overflow:auto}
.lp-side .pass b{display:block;font-size:13.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:6px}
.lp-side .pass mark{background:var(--warning-soft);color:inherit;border-radius:4px;padding:0 2px;transition:background 300ms}
.lp-cap{margin:14px 22px 0;display:flex;gap:12px;align-items:flex-start;min-height:56px;font-size:16.5px;line-height:1.5}
.lp-cap .who{flex:none;width:32px;height:32px;border-radius:10px;display:grid;place-items:center;background:var(--info-soft);color:var(--info)}
.lp-cap .who svg{width:18px;height:18px}
.lp-cap .w{color:var(--muted);transition:color 120ms}
.lp-cap .w.on{color:var(--ink)}
.lp-ctl{display:flex;align-items:center;gap:14px;padding:14px 22px 18px;flex-wrap:wrap}
.lp-play{width:52px;height:52px;border-radius:50%;border:0;background:var(--primary);color:#fff;display:grid;place-items:center;cursor:pointer;box-shadow:0 4px 0 var(--primary-base);transition:transform 120ms var(--ease)}
.lp-play:active{transform:translateY(3px);box-shadow:0 1px 0 var(--primary-base)}
.lp-play svg{width:22px;height:22px}
.lp-restart{width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:var(--surface);color:var(--ink);display:grid;place-items:center;cursor:pointer}
.lp-restart svg{width:18px;height:18px}
.lp-track{flex:1;min-width:120px;height:8px;border-radius:999px;background:var(--primary-soft);overflow:hidden}
.lp-track b{display:block;height:100%;width:0;background:var(--primary);transition:width 300ms linear}
.lp-count{font-size:14.5px;color:var(--muted);font-variant-numeric:tabular-nums;min-width:56px;text-align:right}
.lp-note{margin-top:14px;text-align:center;color:var(--muted);font-size:15px}
.lp-overlay{position:absolute;inset:0;display:grid;place-items:center;background:color-mix(in srgb,var(--canvas) 55%,transparent);border:0;cursor:pointer;width:100%;color:var(--ink)}
.lp-overlay span{display:inline-flex;align-items:center;gap:10px;padding:14px 22px;border-radius:999px;background:var(--primary);color:#fff;font:700 17px var(--font-body);box-shadow:0 4px 0 var(--primary-base),var(--shadow-overlay)}
.lp-overlay svg{width:20px;height:20px}
/* ===== product tour ===== */
.tour{display:grid;grid-template-columns:.8fr 1.2fr;gap:48px;align-items:start;margin-top:40px}
.tour-tabs{display:grid;gap:8px}
.tour-tabs button{display:grid;gap:4px;text-align:left;padding:16px 18px;border-radius:18px;border:1.5px solid transparent;background:transparent;color:var(--ink);cursor:pointer;transition:background 160ms,border-color 160ms}
.tour-tabs button b{font:700 19px/1.2 var(--font-display);letter-spacing:-.01em}
.tour-tabs button span{color:var(--muted);font-size:15.5px;line-height:1.5;display:none}
.tour-tabs button[aria-selected="true"]{background:var(--surface);border-color:var(--line);box-shadow:var(--shadow-card)}
.tour-tabs button[aria-selected="true"] span{display:block}
.tour-tabs button[aria-selected="true"] b{color:var(--primary-text)}
.tour-tabs button:hover:not([aria-selected="true"]){background:color-mix(in srgb,var(--surface) 60%,transparent)}
.scr{background:var(--surface);border-radius:var(--r-hero);box-shadow:var(--shadow-overlay),0 0 0 1px var(--line);overflow:hidden;min-width:0}
.scr[hidden]{display:none}
.scr-in{padding:22px;display:grid;gap:16px}
.scr .bar-t{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;font-size:14.5px;color:var(--muted)}
.scr .bar-t b{color:var(--ink)}
.ring-row{display:flex;gap:22px;align-items:center;flex-wrap:wrap}
.ring{width:118px;height:118px;flex:none;position:relative}
.ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.ring strong{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;gap:1px;font:800 30px/1 var(--font-display)}
.ring strong small{transform:translateY(.12em)}
.big-n{font:800 34px/1.05 var(--font-display);letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.tiny-l{font-size:13.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.topics{display:grid;gap:8px;list-style:none;margin:0;padding:0}
.topics li{display:grid;grid-template-columns:1fr auto;gap:6px 12px;align-items:center;font-size:15.5px;padding:10px 12px;border-radius:12px;background:var(--canvas)}
.topics .tb{grid-column:1/-1;height:6px;border-radius:999px;background:var(--line);overflow:hidden}
.topics .tb i{display:block;height:100%;border-radius:inherit}
.tag-s{font-size:13.5px;font-weight:700;padding:3px 9px;border-radius:999px}
.t-bad{background:var(--error-soft);color:var(--error)} .t-mid{background:var(--warning-soft);color:var(--warning)} .t-good{background:var(--success-soft);color:var(--success)}
.fill-bad{background:var(--error)} .fill-mid{background:var(--warning)} .fill-good{background:var(--success)}
.optlist{display:grid;gap:8px}
.opt{display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:14px;border:1.5px solid var(--line);font-size:16px}
.opt b{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;background:var(--canvas);font-size:14px}
.opt.sel{border-color:var(--primary);background:var(--primary-soft)}
.opt.sel b{background:var(--primary);color:#fff}
.sure{display:flex;gap:8px;flex-wrap:wrap;align-items:center;font-size:14.5px;color:var(--muted)}
.sure span{padding:6px 12px;border-radius:999px;border:1px solid var(--line);color:var(--ink);font-weight:600}
.sure span.on{background:var(--info-soft);border-color:transparent;color:var(--info)}
.wk{display:flex;gap:8px;flex-wrap:wrap;align-items:center;font-size:14.5px;color:var(--muted)}
.wk span{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:10px;background:var(--canvas);color:var(--ink);font-weight:600}
.wk svg{width:16px;height:16px}
.row-btns{display:flex;gap:10px;justify-content:flex-end;flex-wrap:wrap}
.chat{display:grid;gap:10px}
.chat p{padding:12px 15px;border-radius:16px;font-size:16px;max-width:88%;line-height:1.5}
.chat .me{justify-self:end;background:var(--ink);color:var(--canvas);border-bottom-right-radius:5px}
.chat .ai{background:var(--info-soft);border-bottom-left-radius:5px}
.chat .work{font:700 21px/1.6 var(--font-hand);background:var(--canvas);padding:12px 16px;border-radius:14px}
.askbox{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:14px;border:1.5px solid var(--line);color:var(--muted);font-size:15px}
.askbox .m{margin-left:auto;width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:var(--peach);color:var(--peach-ink)}
.askbox .m svg{width:18px;height:18px}
.cbt-top{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;padding:12px 18px;background:var(--band);color:var(--band-ink);font-size:14.5px}
.cbt-top .timer{font:700 18px var(--font-body);font-variant-numeric:tabular-nums;padding:4px 10px;border-radius:8px;background:var(--band-line)}
.cbt-subj{display:flex;gap:6px;flex-wrap:wrap}
.cbt-subj span{padding:7px 12px;border-radius:10px;background:var(--canvas);font-size:14px;font-weight:600;color:var(--muted)}
.cbt-subj span.on{background:var(--primary);color:#fff}
.cbt-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:16px}
.pal{display:grid;grid-template-columns:repeat(8,1fr);gap:5px;align-content:start}
.pal i{aspect-ratio:1;border-radius:7px;display:grid;place-items:center;font-style:normal;font-size:12.5px;font-weight:700;background:var(--canvas);color:var(--muted);font-variant-numeric:tabular-nums}
.pal i.a{background:var(--success-soft);color:var(--success)} .pal i.f{background:var(--warning-soft);color:var(--warning)} .pal i.c{background:var(--primary);color:#fff}
.pal-key{display:flex;gap:10px;flex-wrap:wrap;font-size:13.5px;color:var(--muted);margin-top:8px}
.bars{display:grid;gap:12px}
.bars div{display:grid;grid-template-columns:130px 1fr 44px;gap:12px;align-items:center;font-size:15.5px}
.bars em{height:12px;border-radius:999px;background:var(--primary-soft);overflow:hidden;font-style:normal}
.bars em i{display:block;height:100%;background:var(--primary);border-radius:inherit}
.bars b{text-align:right;font-variant-numeric:tabular-nums}
.kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.kpis div{padding:12px 14px;border-radius:14px;background:var(--canvas)}
.kpis b{display:block;font:800 26px/1.1 var(--font-display);font-variant-numeric:tabular-nums}
.kpis small{font-size:13.5px;color:var(--muted)}
.spark{width:100%;height:70px;color:var(--primary)}
@media (max-width:920px){.tour{grid-template-columns:1fr;gap:20px}.tour-tabs{grid-auto-flow:column;grid-auto-columns:max-content;overflow-x:auto;padding-bottom:4px}.tour-tabs button span{display:none!important}.tour-tabs button{padding:10px 14px}.tour-tabs button b{font-size:16px}.lp-body.with-side{grid-template-columns:1fr}.lp-side{max-height:260px}}
@media (max-width:640px){.lp-board{height:300px;padding:14px}.cbt-grid{grid-template-columns:1fr}.bars div{grid-template-columns:96px 1fr 40px}.kpis b{font-size:22px}.lp-tabs button{padding:10px 14px}}
.tour-copy{color:var(--muted);font-size:16px;margin-top:14px}

/* hero floating cards */
.float-card{position:absolute;z-index:3;background:var(--surface);border-radius:18px;box-shadow:var(--shadow-overlay),0 0 0 1px var(--line);padding:12px 14px}
.fc-weak{left:-48px;bottom:-62px;display:flex;gap:10px;align-items:center;max-width:260px}
.fc-weak .fc-ic{flex:none;width:36px;height:36px;border-radius:11px;background:var(--error-soft);color:var(--error);display:grid;place-items:center}
.fc-weak .fc-ic svg{width:19px;height:19px}
.float-card small{display:block;font-size:12.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.float-card b{display:block;font-size:15.5px;margin-top:2px}
.float-card em{display:block;font-style:normal;font-size:14px;color:var(--primary-text);font-weight:600}
.fc-score{right:-30px;top:58px;text-align:left}
.fc-score b{font:800 26px/1.1 var(--font-display);font-variant-numeric:tabular-nums}
.fc-score b span{color:var(--muted);font-weight:500}
.fc-score em{color:var(--success)}
.reveal-ready .float-card{animation:floatin 700ms var(--ease-celebrate) both}
.reveal-ready .fc-weak{animation-delay:1.4s}.reveal-ready .fc-score{animation-delay:1.8s}
@keyframes floatin{from{opacity:0;transform:translateY(14px) scale(.94)}to{opacity:1;transform:none}}
.float-card{animation-fill-mode:both}
@media (prefers-reduced-motion: no-preference){.fc-score{animation:floatin 700ms var(--ease-celebrate) 1.8s both, bob 5s ease-in-out 2.6s infinite}.fc-weak{animation:floatin 700ms var(--ease-celebrate) 1.4s both, bob 6s ease-in-out 2.2s infinite}}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
@media (max-width:1180px){.fc-weak{left:-12px}.fc-score{right:-8px}}
@media (max-width:640px){.fc-weak{left:10px;bottom:-84px;max-width:250px}.fc-score{right:10px;top:-26px;padding:9px 12px}.fc-score small{font-size:11.5px}.fc-score b{font-size:20px}.hero .board{margin-top:28px;margin-bottom:80px}}
/* lesson embed */
.lp-stage{position:relative;aspect-ratio:16/10;background:var(--canvas);max-width:100%}
.lp-stage img,.lp-stage iframe{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:top;border:0;display:block}
.lp-stage iframe{z-index:2;background:transparent}
.lp-fallback{position:absolute;inset:0;z-index:3;display:grid;place-content:center;justify-items:center;gap:14px;text-align:center;background:color-mix(in srgb,var(--canvas) 40%,transparent);padding:16px}
.lp-fallback{background:radial-gradient(circle at 1px 1px,var(--line) 1px,transparent 1.5px) 0 0/22px 22px,var(--canvas)}
.lp-fallback p{color:var(--muted);max-width:40ch}
.lp-kicker{font-size:13.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--primary-text)}
.lp-title{font-size:clamp(26px,4vw,44px);max-width:20ch}
.lp-fallback .btn{margin-top:6px}
/* recreated app screens, matching the live product */
.mk{font-size:15px}
.mk .mk-bar{display:flex;align-items:center;gap:6px;height:38px;padding:0 16px;border-bottom:1px solid var(--line);background:var(--canvas)}
.mk .mk-bar i{width:10px;height:10px;border-radius:50%;background:var(--line)}
.mk .mk-bar span{margin-left:8px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:13px;letter-spacing:.04em;color:var(--muted)}
.mk-body{display:grid;gap:16px;padding:22px}
.mk-eyebrow{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:13px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:#9BE58A}
.mk-eyebrow.dark{color:var(--primary-text)}
.mk-score{display:flex;align-items:center;gap:20px;padding:18px;border-radius:14px;background:#221a3d;color:#fff;flex-wrap:wrap}
.mk-score .ring{width:110px;height:110px}
.mk-score .ring strong{color:#fff;font-size:30px}
.mk-score .ring small{font-size:16px}
.mk-score>div:last-child{display:grid;gap:4px}
.mk-big{font:800 30px/1.1 var(--font-display);font-variant-numeric:tabular-nums}
.mk-sub{font-size:14.5px;color:rgba(255,255,255,.75)}
.mk-topics{display:grid;gap:12px;margin:0;padding:0;list-style:none}
.mk-topics li{display:grid;grid-template-columns:minmax(0,1fr) 80px 140px;align-items:center;gap:12px;font-size:15px;font-weight:600}
.mk-track{height:7px;border-radius:999px;background:var(--line);overflow:hidden}
.mk-track i{display:block;height:100%;border-radius:inherit}
.mk-track i.bad{background:var(--error)}.mk-track i.mid{background:var(--warning)}.mk-track i.good{background:var(--success)}
.mk-word{font-size:14px;text-align:right}
.mk-word.bad{color:var(--error)}.mk-word.mid{color:var(--warning)}.mk-word.good{color:var(--success)}
.mk-q-top{display:flex;justify-content:space-between;gap:8px;flex-wrap:wrap}
.mk-pill{padding:5px 12px;border-radius:999px;background:var(--primary-soft);font-size:14px;font-weight:700;color:var(--primary-text)}
.mk-pill.ghost{background:var(--canvas);color:var(--muted)}
.mk-stem{margin:0;font-family:Georgia,"Times New Roman",serif;font-size:19px;line-height:1.45}
.mk-options{display:grid;gap:8px;margin:0;padding:0;list-style:none}
.mk-options li{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:12px;box-shadow:inset 0 0 0 1.5px var(--line);font-size:16px}
.mk-options b{display:grid;place-items:center;width:30px;height:30px;border-radius:9px;background:var(--canvas);font-family:ui-monospace,monospace;font-size:14px}
.mk-options li.picked{background:var(--primary-soft);box-shadow:inset 0 0 0 2px var(--primary)}
.mk-options li.picked b{background:var(--primary);color:#fff}
.mk-sure{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--muted)}
.mk-sure span:not(:first-child){padding:6px 12px;border-radius:999px;box-shadow:inset 0 0 0 1px var(--line);font-weight:600;color:var(--ink)}
.mk-sure span.on{background:var(--ink);box-shadow:none;color:var(--canvas)}
.mk-actions{display:flex;justify-content:space-between;align-items:center}
.mk-hint{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:700;color:var(--primary-text)}
.mk-hint svg{width:17px;height:17px}
.mk-go{padding:11px 20px;border-radius:12px;background:var(--primary);box-shadow:0 4px 0 var(--primary-base);font-weight:700;color:#fff}
.mk.mk-paper .mk-body{background:#FBF9F4;color:#222034}
.mk-chat{display:grid;gap:12px}
.mk-me{justify-self:end;max-width:82%;margin:0;padding:11px 15px;border-radius:12px 12px 4px 12px;background:var(--primary);color:#fff}
.mk-them{display:flex;gap:10px;align-items:flex-start}
.mk-face{flex:none;width:38px;height:38px;border-radius:50%;background:radial-gradient(circle at 38% 45%,#2a1650 2px,transparent 3px),radial-gradient(circle at 62% 45%,#2a1650 2px,transparent 3px),radial-gradient(circle,#f5c9a0 55%,#6D3CE9 57%)}
.mk-them p{margin:0;padding:11px 15px;border-radius:12px 12px 12px 4px;background:#fff;box-shadow:inset 0 0 0 1px #DCD9E7;line-height:1.5}
.mk-them em{font-style:normal;font-weight:700}
.mk-written{margin:0 0 0 48px;font:700 24px/1.35 var(--font-hand);color:#222034}
.mk-written u{text-decoration:none;background:linear-gradient(transparent 55%,rgba(255,199,0,.55) 55%)}
.mk-ask{display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:12px;background:#fff;box-shadow:inset 0 0 0 1.5px #DCD9E7;color:#625E74}
.mk-ask span{flex:1}
.mk-ask svg{width:18px;height:18px}
.mock-img{display:block;width:100%;height:auto;max-width:100%}
@media (max-width:640px){.mk-topics li{grid-template-columns:1fr 1fr;}.mk-topics li .mk-track{grid-column:1/-1;order:3}.mk-word{text-align:right}}

/* Phone fixes, 12 Nov 2026 */
header.top{background:var(--canvas)}
.lp-tap,.lp-phone{display:none}
.lp-full{position:fixed;inset:0;z-index:100;display:flex;flex-direction:column;background:var(--canvas);padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
.lp-full-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:8px max(16px,env(safe-area-inset-right,0px)) 8px max(16px,env(safe-area-inset-left,0px));border-bottom:1px solid var(--line);font-weight:700;font-size:15.5px}
.lp-full-bar span{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lp-full-x{flex:none;min-height:44px;padding:0 18px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--ink);font:700 15px var(--font-body);cursor:pointer}
.lp-full iframe{flex:1;width:100%;min-height:0;border:0;display:block;background:var(--canvas)}
html.lp-lock,html.lp-lock body{overflow:hidden}
html.lp-lock .mcta{display:none}
@media (max-width:640px){
  body{padding-bottom:calc(78px + env(safe-area-inset-bottom,0px))}
  .hero .board{margin:96px 0 150px!important}
  .fc-score{top:-86px;right:10px}
  .fc-weak{top:calc(100% + 34px);bottom:auto;left:10px;max-width:310px}
  .lp-stage{background:radial-gradient(circle at 1px 1px,var(--line) 1px,transparent 1.5px) 0 0/22px 22px,var(--canvas)}
  .lp-stage .lp-fallback{display:none!important}
  .lp-tap{display:grid;place-items:center;position:absolute;inset:0;margin:auto;z-index:4;width:76px;height:76px;border-radius:50%;border:0;background:var(--primary);color:#fff;cursor:pointer;box-shadow:0 0 0 10px color-mix(in srgb,var(--primary) 22%,transparent),0 6px 18px rgba(0,0,0,.25)}
  .lp-tap svg{width:30px;height:30px;margin-left:4px}
  .lp-phone{display:grid;gap:12px;padding:16px 16px 18px}
  .lp-phone .lp-pt{display:block;font:800 21px/1.2 var(--font-display);margin-top:4px}
  .lp-phone .btn{width:100%;justify-content:center}
  .lp-phone p{margin:0;text-align:center;color:var(--muted);font-size:14.5px}
}