:root{
  --bg:#f3f4f1;--bg-2:#eceee9;--surface:#fff;--surface-2:#f6f7f4;
  --fg:#181a17;--fg-2:#3d413a;--muted:#6c7267;--line:#e2e5df;--line-2:#d3d8cf;
  --ink:#181a17;--ink-fg:#fbfbf8;--hl:#f7d417;--hl-ink:#1b1a0f;--hl-soft:rgba(247,212,23,.38);--cloze:#2456c9;
  --good:#1f7a4a;--bad:#b4472f;
  --serif:Newsreader,Georgia,"Times New Roman",serif;--sans:Geist,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --r:14px;--shadow:0 1px 2px rgba(24,26,23,.06),0 12px 32px -12px rgba(24,26,23,.18);
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#0e100e;--bg-2:#131513;--surface:#171a17;--surface-2:#1d201d;
  --fg:#edf0e9;--fg-2:#c7cbc1;--muted:#949a8e;--line:rgba(237,240,233,.09);--line-2:rgba(237,240,233,.17);
  --ink:#edf0e9;--ink-fg:#111310;--hl:#f2d43c;--hl-ink:#17160b;--hl-soft:rgba(242,212,60,.24);--cloze:#93b6ff;
  --good:#58c389;--bad:#e8856c;--shadow:0 1px 2px rgba(0,0,0,.4),0 14px 36px -14px rgba(0,0,0,.7);
  color-scheme:dark;
}}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 var(--sans);letter-spacing:-.003em;-webkit-font-smoothing:antialiased}
h1,h2,h3{margin:0;font-weight:600;letter-spacing:-.025em;text-wrap:balance}
p{margin:0;text-wrap:pretty}
a{color:inherit}
em{font-family:var(--serif);font-style:italic;font-weight:500}
code{font:.9em var(--mono,"Geist Mono",ui-monospace,monospace);background:var(--surface-3,var(--bg-2));padding:.1em .4em;border-radius:6px}
.wrap{width:min(1120px,100% - 32px);margin-inline:auto}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:var(--ink-fg);padding:8px 14px;border-radius:8px;z-index:100}
.skip:focus{left:8px}
:focus-visible{outline:2px solid var(--cloze);outline-offset:3px;border-radius:6px}
.muted{color:var(--muted)}.small{font-size:.875rem}

.brand{display:inline-flex;align-items:center;gap:10px;font-weight:650;font-size:1.1rem;letter-spacing:-.02em;text-decoration:none}
.mark{width:19px;height:23px;border-radius:5px;background:var(--surface);border:2px solid var(--fg);position:relative;transform:rotate(-7deg);flex:none}
.mark::after{content:"";position:absolute;left:2px;right:2px;top:7px;height:5px;border-radius:2px;background:var(--hl)}

.btn{font:inherit;font-weight:600;font-size:.95rem;border:1px solid var(--line-2);background:var(--surface);color:var(--fg);padding:10px 18px;border-radius:999px;cursor:pointer;transition:transform .15s,background .15s,border-color .15s;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}
.btn:hover{border-color:var(--fg)}
.btn:active{transform:scale(.97)}
.btn.pri{background:var(--ink);color:var(--ink-fg);border-color:var(--ink)}
.btn.pri:hover{opacity:.9}
.btn.ghost{background:transparent}
.btn.lg{padding:14px 26px;font-size:1rem}
.btn[disabled]{opacity:.6;cursor:progress}
.linkbtn{font:inherit;background:none;border:0;padding:0;color:var(--fg);text-decoration:underline;text-underline-offset:3px;cursor:pointer}

.nav{position:sticky;top:0;z-index:30;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:saturate(1.6) blur(16px);-webkit-backdrop-filter:saturate(1.6) blur(16px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;gap:20px;height:64px}
.nav-links{display:flex;gap:26px;margin-left:auto;font-size:.93rem;color:var(--fg-2)}
.nav-links a{text-decoration:none}.nav-links a:hover{color:var(--fg)}
.nav .btn{padding:8px 18px}

.hero{display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center;padding-block:72px 64px}
.eyebrow{display:inline-block;font-size:.8rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--muted);margin-bottom:18px}
.hero h1{font-size:clamp(2.2rem,5.2vw,3.7rem);line-height:1.04;font-weight:600}
.hero h1 em{background:linear-gradient(transparent 62%,var(--hl-soft) 62%);padding:0 .08em}
.lead{font-size:1.15rem;color:var(--fg-2);margin:22px 0 28px;max-width:34em}
.trust{list-style:none;display:flex;flex-wrap:wrap;gap:8px 22px;padding:0;margin:20px 0 0;font-size:.88rem;color:var(--muted)}
.trust li::before{content:"✓";color:var(--good);margin-right:7px;font-weight:700}

.lg-row{display:flex;gap:8px;padding:6px;background:var(--surface);border:1px solid var(--line-2);border-radius:999px;box-shadow:var(--shadow);max-width:520px}
.lg-row:focus-within{border-color:var(--cloze)}
.lg-in{flex:1;min-width:0;border:0;background:transparent;font:inherit;color:var(--fg);padding:0 8px 0 18px;outline:0}
.lg-in::placeholder{color:var(--muted)}
.lg-go{white-space:nowrap}
.lg-err{margin-top:10px;font-size:.9rem;color:var(--bad)}
.lg-note{margin-top:12px;font-size:.78rem;color:var(--muted);max-width:520px}
.lg-ok{max-width:520px;background:var(--surface);border:1px solid var(--line-2);border-radius:var(--r);padding:22px;box-shadow:var(--shadow)}
.lg-ok h3{font-size:1.2rem;margin:10px 0 6px}
.lg-ok p+p{margin-top:10px}
.ok-ico{width:36px;height:36px;border-radius:50%;background:var(--hl);color:var(--hl-ink);display:grid;place-items:center;font-weight:800}
.lg-dev{margin-top:14px}
.lg-dev .btn{font-size:.85rem}

.demo{margin:0;background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:24px;box-shadow:var(--shadow);transform:rotate(1.2deg)}
.demo-top{display:flex;justify-content:space-between;align-items:center;font-size:.8rem;color:var(--muted);margin-bottom:22px}
.chip{background:var(--bg-2);padding:4px 10px;border-radius:999px;font-weight:550;color:var(--fg-2)}
.card-q{font-family:var(--serif);font-size:clamp(1.3rem,2.4vw,1.65rem);line-height:1.45;color:var(--fg)}
.blank{font:inherit;color:var(--cloze);background:var(--hl-soft);border:0;border-bottom:2px solid var(--cloze);border-radius:6px 6px 0 0;padding:0 .35em;cursor:pointer;display:inline-grid;vertical-align:baseline;min-width:3.4em;text-align:center}
.blank>span{grid-area:1/1}
.blank-text{visibility:hidden;font-weight:600}
.blank-hint{font:500 .62em var(--sans);color:var(--muted);align-self:center}
.blank.open .blank-text{visibility:visible;animation:pop .3s}
.blank.open .blank-hint{visibility:hidden}
.blank.open{background:var(--hl-soft)}
@keyframes pop{from{transform:scale(.7);opacity:0}to{transform:none;opacity:1}}
.card-src{margin-top:14px;font-size:.8rem;color:var(--muted)}
.rate{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:26px;opacity:.25;transition:opacity .3s}
.rate.show{opacity:1}
.rate button{font:inherit;display:flex;flex-direction:column;gap:2px;align-items:center;padding:10px 4px;background:var(--surface-2);border:1px solid var(--line);border-radius:12px;color:var(--fg-2)}
.rate b{font-size:.82rem;font-weight:600;color:var(--fg)}
.rate span{font-size:.72rem;color:var(--muted)}
.rate .on{border-color:var(--fg)}
.demo figcaption{margin-top:18px;font-size:.78rem;color:var(--muted)}

.band{background:var(--ink);color:var(--ink-fg);padding-block:72px}
.band-in{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.band h2{font-size:clamp(1.7rem,3.4vw,2.5rem);line-height:1.12;color:var(--ink-fg)}
.band h2 em{color:var(--hl)}
.band p{font-size:1.08rem;opacity:.8}

.sec-title{font-size:clamp(1.6rem,3vw,2.2rem);line-height:1.15;text-align:center;margin-bottom:44px}
.sec-title.left{text-align:left;margin-bottom:18px}
.steps,.features,.faq{padding-block:84px 0}
.steps-grid{list-style:none;display:grid;grid-template-columns:repeat(3,1fr);gap:20px;padding:0;margin:0}
.steps-grid li{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:26px}
.num{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--hl);color:var(--hl-ink);font-weight:700;margin-bottom:18px}
.steps-grid h3,.feat-grid h3{font-size:1.1rem;margin-bottom:8px}
.steps-grid p,.feat-grid p{color:var(--fg-2);font-size:.97rem}

.curve{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding-block:84px 0}
.curve-copy p{color:var(--fg-2);margin-top:14px}
.chart{margin:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.chart svg{width:100%;height:auto;display:block}
.chart figcaption{font-size:.78rem;color:var(--muted);margin-top:8px;text-align:center}
.chart .grid line{stroke:var(--line);stroke-dasharray:3 4}
.chart .axis{stroke:var(--line-2)}
.chart .t{fill:var(--muted);font:12px var(--sans)}
.chart .t-bad{fill:var(--bad);font-weight:600}.chart .t-good{fill:var(--good);font-weight:600}
.chart .c-bad{fill:none;stroke:var(--bad);stroke-width:2.5;stroke-linecap:round;stroke-dasharray:6 5}
.chart .c-good{fill:none;stroke:var(--good);stroke-width:3;stroke-linejoin:round}
.chart .dots circle{fill:var(--hl);stroke:var(--fg);stroke-width:1.5}

.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--surface)}
.feat-grid article{padding:26px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.feat-grid article:nth-child(3n){border-right:0}
.feat-grid article:nth-last-child(-n+3){border-bottom:0}

.anki{padding-block:84px 0}
.anki-card{display:flex;gap:32px;align-items:center;justify-content:space-between;background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:36px}
.anki-card h2{font-size:clamp(1.4rem,2.6vw,1.9rem);margin-bottom:10px}
.anki-card p{color:var(--fg-2);max-width:42em}
.anki-card .btn{flex:none}

.faq-list{max-width:760px;margin-inline:auto;border-top:1px solid var(--line)}
details{border-bottom:1px solid var(--line)}
summary{cursor:pointer;list-style:none;padding:20px 40px 20px 0;font-weight:600;position:relative}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";position:absolute;right:6px;top:50%;transform:translateY(-50%);font-size:1.4rem;font-weight:400;color:var(--muted);transition:transform .2s}
details[open] summary::after{transform:translateY(-50%) rotate(45deg)}
details p{padding:0 40px 22px 0;color:var(--fg-2)}

.final{margin-top:84px;background:var(--bg-2);border-block:1px solid var(--line);padding-block:72px}
.final-in{display:flex;flex-direction:column;align-items:center;text-align:center;gap:26px}
.final h2{font-size:clamp(1.6rem,3.2vw,2.4rem);max-width:20em}
.final .lg-row,.final .lg-note,.final .lg-ok{margin-inline:auto}
.final .lg-note{text-align:center}

.foot{padding-block:36px 48px}
.foot-in{display:flex;flex-wrap:wrap;gap:12px 28px;justify-content:space-between;align-items:center;color:var(--muted);font-size:.88rem}

.dlg{border:0;padding:0;background:transparent;color:var(--fg);max-width:min(460px,100% - 24px);width:100%;margin:auto}
.dlg::backdrop{background:rgba(14,16,14,.55);backdrop-filter:blur(4px)}
.dlg-in{position:relative;background:var(--surface);border:1px solid var(--line-2);border-radius:22px;padding:32px 28px 28px;box-shadow:var(--shadow)}
.dlg h2{font-size:1.5rem;margin:22px 0 6px}
.dlg .muted{margin-bottom:22px;font-size:.95rem}
.dlg-x{position:absolute;right:12px;top:10px;width:36px;height:36px;border:0;border-radius:50%;background:transparent;color:var(--muted);font-size:1.6rem;line-height:1;cursor:pointer}
.dlg-x:hover{background:var(--bg-2);color:var(--fg)}
.dlg .lg-row{box-shadow:none;flex-direction:column;border-radius:var(--r);padding:8px;gap:8px}
.dlg .lg-in{padding:12px}
.dlg .lg-ok{box-shadow:none;border:0;padding:0}

@media (max-width:900px){
  .hero{grid-template-columns:1fr;gap:44px;padding-block:44px}
  .demo{transform:none}
  .band-in,.curve{grid-template-columns:1fr;gap:28px}
  .steps-grid{grid-template-columns:1fr}
  .feat-grid{grid-template-columns:1fr 1fr}
  .feat-grid article:nth-child(3n){border-right:1px solid var(--line)}
  .feat-grid article:nth-child(2n){border-right:0}
  .feat-grid article:nth-last-child(-n+3){border-bottom:1px solid var(--line)}
  .feat-grid article:nth-last-child(-n+2){border-bottom:0}
  .nav-links{display:none}.nav .btn{margin-left:auto}
  .anki-card{flex-direction:column;align-items:flex-start;padding:26px}
}
@media (max-width:560px){
  .feat-grid{grid-template-columns:1fr}
  .feat-grid article{border-right:0!important;border-bottom:1px solid var(--line)!important}
  .feat-grid article:last-child{border-bottom:0!important}
  .lg-row{flex-direction:column;border-radius:var(--r);padding:8px}
  .lg-in{padding:12px}
  .lg-go{width:100%}
  .steps,.features,.faq,.curve,.anki{padding-top:60px}
  .rate{gap:6px}
}

.sec-sub{text-align:center;color:var(--fg-2);margin:-28px auto 40px;max-width:36em}
.pricing{padding-block:84px 0}
.plans{display:grid;grid-template-columns:1fr 1fr;gap:20px;max-width:820px;margin-inline:auto}
.plan{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:30px;display:flex;flex-direction:column}
.plan-pro{border:2px solid var(--fg);box-shadow:var(--shadow)}
.plan h3{font-size:1.15rem}
.badge{position:absolute;top:-13px;left:26px;background:var(--hl);color:var(--hl-ink);font-size:.74rem;font-weight:700;letter-spacing:.03em;padding:4px 12px;border-radius:999px}
.price{display:flex;align-items:baseline;gap:8px;margin:14px 0 4px}
.price b{font-size:2.6rem;font-weight:650;letter-spacing:-.04em;line-height:1}
.price span{color:var(--muted);font-size:.95rem}
.price-alt{font-size:.9rem;color:var(--fg-2);margin-bottom:4px}
.plan ul{list-style:none;padding:0;margin:20px 0 26px;display:grid;gap:10px;flex:1}
.plan li{position:relative;padding-left:26px;font-size:.95rem;color:var(--fg-2)}
.plan li::before{content:"✓";position:absolute;left:0;color:var(--good);font-weight:700}
.plan .btn{width:100%}
.plans-note{text-align:center;color:var(--muted);font-size:.85rem;margin-top:22px}
@media (max-width:700px){.plans{grid-template-columns:1fr}.pricing{padding-top:60px}.sec-sub{margin-top:-20px}}