@font-face{font-family:"Instrument Serif";src:url(/assets/fonts/instrument-serif-400.woff2) format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"Instrument Serif";src:url(/assets/fonts/instrument-serif-400-italic.woff2) format("woff2");font-weight:400;font-style:italic;font-display:swap}
@font-face{font-family:Inter;src:url(/assets/fonts/inter-400.woff2) format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:Inter;src:url(/assets/fonts/inter-500.woff2) format("woff2");font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:Inter;src:url(/assets/fonts/inter-600.woff2) format("woff2");font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:"JetBrains Mono";src:url(/assets/fonts/jetbrains-mono-400.woff2) format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"JetBrains Mono";src:url(/assets/fonts/jetbrains-mono-500.woff2) format("woff2");font-weight:500;font-style:normal;font-display:swap}

:root{
  color-scheme:light dark;
  --bg:#F6F4EF;
  --bg-2:#EEEBE3;
  --surface:#FCFBF8;
  --fg:#0E0F13;
  --fg-2:#2B2D34;
  --muted:#5C5E66;
  --line:rgba(14,15,19,.12);
  --line-2:rgba(14,15,19,.22);
  --accent:#FF5B2E;
  --accent-text:#B23C16;
  --accent-display:#DD4A1F;
  --accent-soft:rgba(255,91,46,.12);
  --on-accent:#0E0F13;
  --bezel:#141519;
  --again:#E5484D;
  --hard:#F5A524;
  --good:#30A46C;
  --easy:#3E8EF7;
  --c-new:#2563C9;
  --c-learn:#C6363B;
  --c-review:#1E7F4F;
  --shadow-lg:0 60px 100px -50px rgba(14,15,19,.45),0 24px 48px -28px rgba(14,15,19,.3);
  --shadow-sm:0 1px 2px rgba(14,15,19,.05),0 12px 32px -20px rgba(14,15,19,.25);
  --serif:"Instrument Serif",ui-serif,Georgia,"Times New Roman",serif;
  --sans:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --wrap:1240px;
  --gutter:clamp(20px,5vw,56px);
  --r-card:20px;
  --r-ctl:14px;
  --ease:cubic-bezier(.2,.7,.2,1);
  interpolate-size:allow-keywords;
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#0E0F13;
    --bg-2:#131419;
    --surface:#17181E;
    --fg:#F3F1EC;
    --fg-2:#D4D2CC;
    --muted:#9C9EA7;
    --line:rgba(243,241,236,.11);
    --line-2:rgba(243,241,236,.2);
    --accent:#FF7A50;
    --accent-text:#FF7A50;
    --accent-display:#FF7A50;
    --accent-soft:rgba(255,122,80,.14);
    --bezel:#1C1D22;
    --c-new:#5A9EF8;
    --c-learn:#EE6A6E;
    --c-review:#3DBE80;
    --shadow-lg:0 60px 100px -50px rgba(0,0,0,.9),0 24px 48px -28px rgba(0,0,0,.7);
    --shadow-sm:0 12px 32px -20px rgba(0,0,0,.8);
  }
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-padding-top:92px}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
body{margin:0;background:var(--bg);color:var(--fg);font:400 1.0625rem/1.6 var(--sans);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;overflow-x:clip}
img,svg{display:block;max-width:100%}
a{color:inherit}
h1,h2,h3{font-family:var(--serif);font-weight:400;line-height:1;letter-spacing:-.015em;margin:0;text-wrap:balance}
p{margin:0;text-wrap:pretty}
ul,ol{margin:0;padding:0}
em{font-style:italic}
strong{font-weight:600}
::selection{background:var(--accent);color:var(--on-accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip{position:absolute;left:16px;top:-100px;z-index:100;background:var(--fg);color:var(--bg);padding:12px 18px;border-radius:999px;text-decoration:none;font-weight:500}
.skip:focus{top:12px}
.mono{font-family:var(--mono);font-feature-settings:"zero" 0}
.wrap{max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}

.label{display:flex;align-items:center;gap:.9em;font:500 .75rem/1 var(--mono);letter-spacing:.09em;text-transform:uppercase;color:var(--muted)}
.label b{font-weight:500;color:var(--accent-text)}
.label::after{content:"";flex:0 0 40px;height:1px;background:var(--line-2)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:.55em;min-height:48px;padding:0 24px;border-radius:999px;background:var(--fg);color:var(--bg);font:500 .9375rem/1 var(--sans);text-decoration:none;transition:transform .2s var(--ease),background-color .2s}
.btn:hover{transform:translateY(-1px)}
.btn-accent{background:var(--accent);color:var(--on-accent)}
.btn-small{min-height:40px;padding:0 18px;font-size:.875rem}
.btn-ghost{background:transparent;color:var(--fg);box-shadow:inset 0 0 0 1px var(--line-2)}

.site-header{position:sticky;top:0;z-index:30;background:var(--bg);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:32px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--fg)}
.brand-mark{width:22px;height:22px;flex:none}
.brand-mark circle{fill:none;stroke:var(--accent);stroke-width:4.5}
.wordmark{font:400 1.875rem/1 var(--serif);letter-spacing:-.01em;transform:translateY(1px)}
.nav{display:flex;gap:30px;margin-left:auto;font-size:.9375rem}
.nav a{text-decoration:none;color:var(--fg-2);padding:6px 0;background:linear-gradient(currentColor,currentColor) 0 100%/0 1px no-repeat;transition:background-size .3s var(--ease)}
.nav a:hover{color:var(--fg);background-size:100% 1px}
.header-end{display:flex;align-items:center;gap:14px}
.lang{display:inline-flex;padding:3px;border-radius:999px;box-shadow:inset 0 0 0 1px var(--line-2);font:500 .75rem/1 var(--mono);letter-spacing:.04em}
.lang a{display:inline-flex;align-items:center;min-height:30px;padding:0 10px;border-radius:999px;text-decoration:none;color:var(--muted)}
.lang a:hover{color:var(--fg)}
.lang a[aria-current]{background:var(--fg);color:var(--bg)}

.badges{display:flex;flex-wrap:wrap;gap:12px}
.badge{display:inline-flex;align-items:center;gap:10px;height:54px;padding:0 20px 0 16px;border-radius:12px;background:#000;color:#fff;text-decoration:none;box-shadow:inset 0 0 0 1px #A6A6A6;transition:transform .2s var(--ease),box-shadow .2s}
.badge:hover{transform:translateY(-2px);box-shadow:inset 0 0 0 1px #d0d0d0,0 14px 28px -16px rgba(0,0,0,.6)}
.badge svg{flex:none}
.badge-apple svg{width:24px;height:28px;fill:#fff;margin-top:-3px}
.badge-play svg{width:24px;height:26px}
.badge-text{display:flex;flex-direction:column;gap:3px;line-height:1;white-space:nowrap}
.badge-small{font:500 .6875rem/1 var(--sans);letter-spacing:.02em}
.badge-play .badge-small{text-transform:uppercase;font-size:.625rem;letter-spacing:.06em}
.badge-big{font:600 1.3125rem/1 var(--sans);letter-spacing:-.02em}
.badge-play .badge-big{font-weight:500;letter-spacing:-.01em}

.hero{position:relative;overflow:hidden;padding-block:clamp(32px,4.6vw,72px) clamp(72px,9vw,128px)}
.hero-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:clamp(32px,5vw,80px);align-items:center}
.hero-copy{position:relative;z-index:2}
.hero h1{font-size:clamp(3.4rem,6.6vw,6.5rem);line-height:.93;letter-spacing:-.028em;margin:24px 0 28px}
.hero h1 span{display:block}
.hero h1 em{color:var(--accent-display)}
.hero-sub{font-size:clamp(1.0625rem,1.35vw,1.25rem);line-height:1.55;color:var(--fg-2);max-width:41ch}
.price-line{display:flex;flex-direction:column;align-items:flex-start;gap:6px;margin:26px 0 28px}
.price-line strong{display:inline-flex;align-items:center;gap:10px;font:500 1rem/1.3 var(--mono);color:var(--fg)}
.price-line strong::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--accent)}
.price-line span{color:var(--muted);font-size:.9375rem;padding-left:18px}

.hero-visual{--phone-w:clamp(244px,21vw,292px);position:relative;display:grid;place-items:center;min-height:calc(var(--phone-w)*2.25)}
.rings{position:absolute;left:50%;top:50%;width:calc(var(--phone-w)*3.11);max-width:none;transform:translate(-50%,-50%);pointer-events:none;overflow:visible}
.rings circle{fill:none;stroke:var(--line-2);stroke-width:1;vector-effect:non-scaling-stroke}
.rings .core{stroke:var(--accent);stroke-width:2.5}
.rings text{font:500 13px var(--mono);fill:var(--muted);letter-spacing:.04em}
.rings .pin{fill:var(--bg);stroke:var(--fg);stroke-width:1.5}
.rings .pin-core{fill:var(--accent);stroke:var(--bg);stroke-width:2}

.phone{--c-bg:var(--bg);position:relative;z-index:1;width:var(--phone-w);aspect-ratio:9/19.2;padding:calc(var(--phone-w)*.032);border-radius:calc(var(--phone-w)*.165);background:var(--bezel);box-shadow:inset 0 0 0 1px rgba(255,255,255,.1),var(--shadow-lg);flex:none}
.phone::before{content:"";position:absolute;top:calc(var(--phone-w)*.062);left:50%;width:30%;height:calc(var(--phone-w)*.085);transform:translateX(-50%);border-radius:999px;background:#000;z-index:3}
.screen{position:relative;height:100%;overflow:hidden;display:flex;flex-direction:column;border-radius:calc(var(--phone-w)*.135);background:var(--c-bg);color:var(--fg);font-size:calc(var(--phone-w)*.0445);line-height:1.35;text-align:left}
.screen::after{content:"";flex:none;align-self:center;width:36%;height:.36em;margin:.2em 0 .7em;border-radius:1em;background:var(--fg);opacity:.85}
.ph-status{display:flex;justify-content:space-between;align-items:center;padding:1.45em 2.1em .3em;font:600 .95em/1 var(--sans)}
.ph-status i{display:block;width:1.9em;height:.95em;border-radius:.3em;box-shadow:inset 0 0 0 1px var(--fg);position:relative;opacity:.9}
.ph-status i::after{content:"";position:absolute;inset:.2em .5em .2em .2em;border-radius:.12em;background:var(--fg)}
.ph-top{display:flex;align-items:center;justify-content:space-between;gap:.6em;padding:1.2em 1.4em .7em}
.ph-back{width:.65em;height:.65em;border-left:2px solid var(--fg);border-bottom:2px solid var(--fg);transform:rotate(45deg);margin-left:.3em}
.ph-deck{font:400 1.55em/1 var(--serif);margin-right:auto;margin-left:.4em}
.ph-counts{display:flex;gap:.7em;font:500 .85em/1 var(--mono)}
.ph-counts .n{color:var(--c-new)}
.ph-counts .l{color:var(--c-learn)}
.ph-counts .r{color:var(--c-review)}
.ph-progress{height:.28em;margin:0 1.4em;border-radius:1em;background:var(--line)}
.ph-progress i{display:block;height:100%;width:38%;border-radius:inherit;background:var(--accent)}
.ph-card{flex:1;display:flex;flex-direction:column;gap:.85em;margin:1em 1em .85em;padding:1.6em 1.35em 1.3em;border-radius:1.65em;background:var(--surface);box-shadow:inset 0 0 0 1px var(--line),var(--shadow-sm)}
.ph-q,.ph-a{font:400 1.95em/1.06 var(--serif);letter-spacing:-.01em}
.ph-sep{height:1px;background:repeating-linear-gradient(90deg,var(--line-2) 0 4px,transparent 4px 8px);margin:.3em 0}
.ph-note{font-size:.95em;color:var(--muted)}
.ph-card.is-study{justify-content:center;position:relative;padding-bottom:4em}
.is-study .ph-chip{position:absolute;left:1.35em;bottom:1.3em}
.ph-chip{margin-top:auto;align-self:flex-start;display:inline-flex;align-items:center;gap:.5em;padding:.6em 1em;border-radius:1em;box-shadow:inset 0 0 0 1px var(--line-2);font:500 .9em/1 var(--sans)}
.ph-chip::before{content:"";width:.55em;height:.55em;border-radius:50%;background:var(--accent)}
.ph-answers{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:.45em;padding:0 1em .9em}
.ph-answers>span{--c:var(--good);display:flex;flex-direction:column;align-items:center;gap:.4em;padding:.8em 0 .85em;border-radius:1.15em;background:color-mix(in srgb,var(--c) 15%,var(--surface));box-shadow:inset 0 -2px 0 color-mix(in srgb,var(--c) 70%,transparent);font:600 .9em/1 var(--sans)}
.ph-answers small{font:500 .82em/1 var(--mono);color:var(--muted)}
.ph-answers .again{--c:var(--again)}
.ph-answers .hard{--c:var(--hard)}
.ph-answers .easy{--c:var(--easy)}
.ph-show{position:absolute;inset:0 1em .9em;display:grid;place-items:center;border-radius:1.15em;background:var(--fg);color:var(--bg);font:600 .95em/1 var(--sans);opacity:0;visibility:hidden}

.ph-title{padding:1.3em 1.4em .2em;font:400 2.5em/1 var(--serif);letter-spacing:-.02em}
.ph-sub{padding:0 1.6em;font:500 .8em/1.4 var(--mono);color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.ph-today{margin:1.1em 1em .9em;padding:1.3em 1.3em 1.2em;border-radius:1.65em;background:var(--fg);color:var(--bg);display:grid;grid-template-columns:1fr auto;gap:.2em 1em;align-items:center}
.ph-today b{font:400 2.6em/1 var(--serif);letter-spacing:-.02em}
.ph-today span{font-size:.9em;opacity:.75}
.ph-today svg{grid-row:1/3;grid-column:2;width:3.8em;height:3.8em}
.ph-today svg circle{fill:none;stroke-width:3.5}
.ph-today .track{stroke:currentColor;opacity:.18}
.ph-today .val{stroke:var(--accent);stroke-linecap:round}
.ph-today .ph-start{opacity:1;grid-column:1/-1;margin-top:.9em;padding:.85em;border-radius:1.1em;background:var(--accent);color:var(--on-accent);text-align:center;font:600 .95em/1 var(--sans)}
.ph-decks{list-style:none;margin:0 1em;display:flex;flex-direction:column}
.ph-decks li{display:grid;grid-template-columns:1fr auto;gap:.45em 1em;padding:.85em .35em;border-bottom:1px solid var(--line)}
.ph-decks li:last-child{border-bottom:0}
.ph-decks strong{font:500 .98em/1.2 var(--sans)}
.ph-decks .ph-counts{font-size:.8em}
.ph-decks .bar{grid-column:1/-1;height:.22em;border-radius:1em;background:var(--line);overflow:hidden}
.ph-decks .bar i{display:block;height:100%;background:var(--fg);opacity:.75;border-radius:inherit}

.ph-explain{display:flex;flex-direction:column;gap:.8em;margin:.9em 1em .8em;padding:1.3em;border-radius:1.65em;background:var(--surface);box-shadow:inset 0 0 0 1px var(--line),var(--shadow-sm)}
.ph-seg{display:grid;grid-template-columns:repeat(4,auto);gap:.25em;padding:.25em;border-radius:1em;background:var(--bg-2);font:500 .78em/1 var(--sans)}
.ph-seg span{padding:.65em .5em;border-radius:.8em;text-align:center;color:var(--muted)}
.ph-seg .on{background:var(--surface);color:var(--fg);box-shadow:var(--shadow-sm)}
.ph-explain p{font-size:.98em;line-height:1.45}
.ph-explain .ph-k{font:500 .78em/1 var(--mono);text-transform:uppercase;letter-spacing:.07em;color:var(--accent-text)}
.ph-ask{margin:auto 1em .9em;padding:.95em 1.1em;border-radius:1.4em;box-shadow:inset 0 0 0 1px var(--line-2);color:var(--muted);font-size:.92em;display:flex;justify-content:space-between;align-items:center}
.ph-ask i{width:1.7em;height:1.7em;border-radius:50%;background:var(--fg);position:relative}
.ph-ask i::after{content:"";position:absolute;left:50%;top:55%;width:.45em;height:.45em;border-left:2px solid var(--bg);border-top:2px solid var(--bg);transform:translate(-50%,-50%) rotate(45deg)}

.ph-tabs{margin-top:auto;display:grid;grid-template-columns:repeat(4,1fr);padding:.75em .5em .35em;border-top:1px solid var(--line)}
.ph-tabs span{display:flex;flex-direction:column;align-items:center;gap:.35em;font:500 .72em/1 var(--sans);color:var(--muted)}
.ph-tabs svg{width:1.9em;height:1.9em;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.ph-tabs .on{color:var(--fg)}
.ph-tabs .on svg{stroke:var(--accent)}
.ph-stat{padding:.8em 1.6em 0}
.ph-stat b{display:block;font:500 3.4em/1 var(--mono);letter-spacing:-.04em}
.ph-stat span{font-size:.85em;color:var(--muted)}
.ph-block{margin:1.1em 1em 0;padding:1.1em 1.1em 1.2em;border-radius:1.4em;background:var(--surface);box-shadow:inset 0 0 0 1px var(--line)}
.ph-block .ph-k{display:block;margin-bottom:.8em;font:500 .74em/1 var(--mono);text-transform:uppercase;letter-spacing:.07em;color:var(--muted)}
.ph-bars{display:flex;align-items:flex-end;gap:.45em;height:4.6em}
.ph-bars i{flex:1;border-radius:.3em .3em .1em .1em;background:var(--fg);opacity:.85}
.ph-bars i:first-child{background:var(--accent);opacity:1}
.ph-days{display:flex;justify-content:space-between;margin-top:.5em;font:500 .7em/1 var(--mono);color:var(--muted)}

.heat{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;grid-template-rows:repeat(7,auto);gap:3px}
.heat i{aspect-ratio:1;border-radius:2px;background:var(--line)}
.heat .h1{background:color-mix(in srgb,var(--accent) 28%,var(--bg-2))}
.heat .h2{background:color-mix(in srgb,var(--accent) 52%,var(--bg-2))}
.heat .h3{background:color-mix(in srgb,var(--accent) 78%,var(--bg-2))}
.heat .h4{background:var(--accent)}
.ph-block .heat{gap:.18em}

.section{padding-block:clamp(88px,12vw,168px);border-top:1px solid var(--line)}
.sec-head{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:28px clamp(16px,2vw,28px);margin-bottom:clamp(56px,8vw,112px)}
.sec-head .label{grid-column:1/-1}
.sec-head h2{grid-column:1/span 8;font-size:clamp(2.75rem,5.8vw,5.25rem);line-height:.98;letter-spacing:-.025em}
.sec-head h2 em{color:var(--accent-display)}
.sec-head .lede{grid-column:9/-1;align-self:end;color:var(--muted);font-size:1.0625rem;max-width:40ch}

.feature{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(32px,5vw,72px) clamp(16px,2vw,28px);align-items:center;padding-block:clamp(48px,6vw,88px);border-top:1px solid var(--line)}
.feature:first-of-type{border-top:0;padding-top:0}
.feature-copy{grid-column:1/span 5}
.feature-visual{grid-column:7/-1}
.feature-flip .feature-copy{grid-column:8/-1;grid-row:1}
.feature-flip .feature-visual{grid-column:1/span 6;grid-row:1}
.kicker{font:500 .8125rem/1 var(--mono);color:var(--accent-text);letter-spacing:.02em}
.feature h3{font-size:clamp(2.25rem,4vw,3.5rem);line-height:1;letter-spacing:-.02em;margin:18px 0 20px}
.feature p{color:var(--fg-2);max-width:44ch}
.ticks{list-style:none;margin-top:28px;display:grid;gap:0;border-top:1px solid var(--line)}
.ticks li{display:flex;gap:14px;align-items:baseline;padding:13px 0;border-bottom:1px solid var(--line);font-size:.975rem;color:var(--fg-2)}
.ticks li::before{content:"";flex:none;width:12px;height:7px;border-left:1.5px solid var(--accent-text);border-bottom:1.5px solid var(--accent-text);transform:translateY(-3px) rotate(-45deg)}

.import-visual{position:relative;display:grid;grid-template-columns:auto 1fr;align-items:center;gap:clamp(16px,3vw,40px)}
.file{position:relative;width:clamp(132px,13vw,168px);aspect-ratio:.78;padding:18px 16px;border-radius:14px;background:var(--surface);box-shadow:inset 0 0 0 1px var(--line-2),var(--shadow-sm);display:flex;flex-direction:column;justify-content:flex-end;gap:6px;clip-path:polygon(0 0,calc(100% - 30px) 0,100% 30px,100% 100%,0 100%)}
.file::before{content:"";position:absolute;top:0;right:0;width:30px;height:30px;background:linear-gradient(225deg,var(--bg) 50%,var(--bg-2) 50%);border-bottom-left-radius:6px;box-shadow:-1px 1px 0 var(--line-2)}
.file b{font:500 .8125rem/1.25 var(--mono);word-break:break-all}
.file span{font:400 .75rem/1.3 var(--mono);color:var(--muted)}
.file .ext{position:absolute;top:18px;left:16px;padding:4px 8px;border-radius:6px;background:var(--accent);color:var(--on-accent);font:500 .6875rem/1 var(--mono);letter-spacing:.04em}
.flow{position:absolute;left:clamp(132px,13vw,168px);width:clamp(16px,3vw,40px);top:50%;height:1px;background:var(--line-2)}
.flow::after{content:"";position:absolute;right:0;top:-3.5px;width:7px;height:7px;border-top:1px solid var(--muted);border-right:1px solid var(--muted);transform:rotate(45deg)}
.tree{list-style:none;padding:8px 22px;border-radius:var(--r-card);background:var(--surface);box-shadow:inset 0 0 0 1px var(--line),var(--shadow-sm)}
.tree li{display:flex;align-items:center;gap:12px;padding:13px 0;border-bottom:1px solid var(--line);font-size:.9375rem}
.tree li:last-child{border-bottom:0}
.tree .sub{padding-left:22px;color:var(--fg-2)}
.tree .sub::before{content:"";width:10px;height:10px;border-left:1px solid var(--line-2);border-bottom:1px solid var(--line-2);margin-top:-8px;margin-right:-2px}
.tree strong{font-weight:500}
.tree .ph-counts{margin-left:auto;font-size:.8125rem}
.tree .meta{margin-left:auto;font:400 .75rem/1 var(--mono);color:var(--muted)}

.curve-wrap{padding:clamp(20px,3vw,36px);border-radius:var(--r-card);background:var(--surface);box-shadow:inset 0 0 0 1px var(--line),var(--shadow-sm)}
.curve-head{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px 24px;margin-bottom:18px;font:500 .75rem/1.3 var(--mono);color:var(--muted);text-transform:uppercase;letter-spacing:.07em}
.curve-key{display:flex;gap:18px}
.curve-key span{display:inline-flex;align-items:center;gap:8px}
.curve-key span::before{content:"";width:18px;height:0;border-top:2px solid var(--accent)}
.curve-key span+span::before{border-top:1.5px dashed var(--muted)}
.curve{width:100%;height:auto;overflow:visible}
.curve .grid{stroke:var(--line);stroke-width:1;vector-effect:non-scaling-stroke}
.curve .ghost{fill:none;stroke:var(--muted);stroke-width:1.5;stroke-dasharray:4 5;vector-effect:non-scaling-stroke;opacity:.8}
.curve .live{fill:none;stroke:var(--accent);stroke-width:2.5;stroke-linejoin:round;vector-effect:non-scaling-stroke}
.curve .area{fill:var(--accent);fill-opacity:.07}
.curve .dot{fill:var(--surface);stroke:var(--accent);stroke-width:2;vector-effect:non-scaling-stroke}
.curve text{font:500 13px var(--mono);fill:var(--muted)}

.fsrs-intervals{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:28px;max-width:420px}
.fsrs-intervals span{--c:var(--good);display:flex;flex-direction:column;gap:6px;padding:12px 12px 13px;border-radius:var(--r-ctl);background:color-mix(in srgb,var(--c) 13%,transparent);box-shadow:inset 0 -2px 0 color-mix(in srgb,var(--c) 75%,transparent);font:500 .875rem/1 var(--sans)}
.fsrs-intervals small{font:500 .8125rem/1 var(--mono);color:var(--muted)}
.fsrs-intervals .again{--c:var(--again)}
.fsrs-intervals .hard{--c:var(--hard)}
.fsrs-intervals .easy{--c:var(--easy)}

.band{--bg:#0E0F13;--bg-2:#17181D;--surface:#18191F;--fg:#F3F1EC;--fg-2:#D4D2CC;--muted:#A2A4AC;--line:rgba(243,241,236,.11);--line-2:rgba(243,241,236,.22);--accent:#FF7A50;--accent-text:#FF7A50;--accent-display:#FF7A50;--accent-soft:rgba(255,122,80,.14);--shadow-sm:0 12px 32px -20px rgba(0,0,0,.8);background:var(--bg);color:var(--fg);border-top:0;color-scheme:dark}
@media (prefers-color-scheme:dark){.band{--bg:#15161B;--surface:#1D1E24;--bg-2:#1A1B20;border-block:1px solid var(--line)}}
.ai-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(40px,5vw,72px) clamp(16px,2vw,28px);align-items:start}
.ai-list{grid-column:1/span 6;list-style:none;counter-reset:ai;border-top:1px solid var(--line)}
.ai-list li{display:grid;grid-template-columns:52px 1fr;gap:4px 12px;padding:26px 0 28px;border-bottom:1px solid var(--line)}
.ai-list li::before{counter-increment:ai;content:counter(ai,decimal-leading-zero);grid-row:1/3;font:500 .8125rem/1.9 var(--mono);color:var(--accent-text)}
.ai-list h3{font-size:clamp(1.75rem,2.6vw,2.25rem);letter-spacing:-.015em;line-height:1.05}
.ai-list p{color:var(--fg-2);margin-top:8px;max-width:46ch}
.ai-demo{grid-column:8/-1;display:grid;gap:16px;position:sticky;top:112px}
.demo-card{padding:24px;border-radius:var(--r-card);background:var(--surface);box-shadow:inset 0 0 0 1px var(--line),var(--shadow-sm)}
.demo-card .ph-k{display:block;font:500 .75rem/1 var(--mono);text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-bottom:16px}
.sources{display:flex;flex-wrap:wrap;gap:8px}
.sources span{padding:9px 14px;border-radius:999px;box-shadow:inset 0 0 0 1px var(--line-2);font-size:.875rem;color:var(--fg-2)}
.sources span:first-child{background:var(--fg);color:var(--bg);box-shadow:none}
.gen{list-style:none;margin-top:18px;border-top:1px solid var(--line)}
.gen li{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--line);font-size:.9375rem}
.gen li:last-child{border-bottom:0;padding-bottom:0}
.gen li::before{content:"";flex:none;width:16px;height:16px;border-radius:5px;background:var(--accent) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 8.2l2.6 2.5L12 5.5' fill='none' stroke='%230E0F13' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/100% no-repeat}
.gen li.off{color:var(--muted)}
.gen li.off::before{background:transparent;box-shadow:inset 0 0 0 1.5px var(--line-2)}
.gen .q{flex:1}
.gen .t{font:400 .75rem/1 var(--mono);color:var(--muted)}
.check{display:grid;gap:12px}
.check .typed{display:flex;justify-content:space-between;align-items:center;padding:14px 16px;border-radius:var(--r-ctl);background:var(--bg-2);font:500 1rem/1 var(--mono)}
.check .typed u{text-decoration:underline wavy var(--hard);text-underline-offset:4px}
.check .verdict{display:flex;gap:12px;align-items:flex-start;font-size:.9375rem;color:var(--fg-2)}
.check .verdict b{flex:none;padding:6px 10px;border-radius:8px;background:color-mix(in srgb,var(--good) 22%,transparent);color:#7EE2AE;font:500 .75rem/1 var(--mono);text-transform:uppercase;letter-spacing:.06em}
.fair{display:flex;gap:14px;align-items:baseline;margin-top:clamp(40px,5vw,64px);padding-top:24px;border-top:1px solid var(--line);color:var(--muted);font-size:.9375rem}
.fair strong{font:500 .875rem/1 var(--mono);color:var(--fg);white-space:nowrap}

.more{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--line);border-left:1px solid var(--line)}
.more>div{padding:clamp(24px,3vw,40px);border-right:1px solid var(--line);border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:12px;min-height:240px}
.more .wide{grid-column:span 2}
.more .num{font:500 .75rem/1 var(--mono);color:var(--accent-text);letter-spacing:.06em}
.more h3{font-size:clamp(1.75rem,2.4vw,2.25rem);line-height:1.05;letter-spacing:-.015em;margin-top:auto}
.more p{color:var(--fg-2);max-width:42ch;font-size:1rem}
.more .heat{margin-bottom:8px;max-width:100%}
.more .wide-inner{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:28px;align-items:end;height:100%}
.more .wide-inner>div{display:flex;flex-direction:column;gap:12px}
.retention{display:flex;gap:28px;margin-top:4px}
.retention b{display:block;font:500 1.75rem/1 var(--mono);letter-spacing:-.03em}
.retention span{font-size:.8125rem;color:var(--muted)}

.screens{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(20px,3vw,48px);align-items:start}
.screens:focus-visible{outline-offset:8px;border-radius:var(--r-card)}
.screens figure{margin:0;display:flex;flex-direction:column;align-items:center;gap:28px;--phone-w:clamp(236px,22vw,300px)}
.screens figure:nth-child(2){margin-top:clamp(0px,5vw,72px)}
.screens figcaption{max-width:30ch;text-align:center;color:var(--muted);font-size:.9375rem}
.screens figcaption b{display:block;font:400 1.5rem/1.1 var(--serif);color:var(--fg);margin-bottom:6px;letter-spacing:-.01em}

.steps{list-style:none;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(24px,3vw,48px);counter-reset:step}
.steps li{position:relative;padding-top:28px;border-top:1px solid var(--fg)}
.steps li::before{counter-increment:step;content:counter(step);display:block;font:400 clamp(5rem,9vw,8.5rem)/.8 var(--serif);color:var(--accent-display);letter-spacing:-.04em;margin-bottom:28px}
.steps h3{font-size:clamp(1.75rem,2.5vw,2.25rem);line-height:1.05;letter-spacing:-.015em;margin-bottom:12px}
.steps p{color:var(--fg-2);max-width:36ch}

.pricing{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:48px clamp(16px,2vw,28px);align-items:center}
.pricing-copy{grid-column:1/span 5}
.pricing-copy h2{font-size:clamp(2.75rem,5.8vw,5.25rem);line-height:.98;letter-spacing:-.025em;margin:28px 0 24px}
.pricing-copy h2 em{color:var(--accent-display)}
.pricing-copy p{color:var(--fg-2);max-width:42ch}
.pricing-copy p+p{margin-top:14px}
.compare-price{grid-column:7/-1;padding:clamp(24px,3.5vw,44px);border-radius:var(--r-card);background:var(--surface);box-shadow:inset 0 0 0 1px var(--line),var(--shadow-sm)}
.pc-row+.pc-row{margin-top:36px}
.pc-head{display:flex;justify-content:space-between;align-items:baseline;gap:16px;margin-bottom:14px}
.pc-head span:first-child{font-size:1rem;font-weight:500}
.pc-head span:last-child{font:400 .8125rem/1.3 var(--mono);color:var(--muted);text-align:right}
.pc-bar{height:44px;border-radius:12px;background:var(--bg-2);overflow:hidden}
.pc-bar i{display:block;height:100%;width:var(--w);border-radius:inherit;background:var(--line-2)}
.pc-row.is-us .pc-bar i{background:var(--accent)}
.pc-total{display:flex;justify-content:space-between;align-items:baseline;gap:16px;margin-top:12px}
.pc-total b{font:500 clamp(1.5rem,2.6vw,2rem)/1 var(--mono);letter-spacing:-.03em}
.pc-total span{font-size:.875rem;color:var(--muted)}
.pc-note{margin-top:32px;padding-top:20px;border-top:1px solid var(--line);font-size:.875rem;color:var(--muted)}

.table-wrap{overflow-x:auto;border-top:1px solid var(--fg);-webkit-overflow-scrolling:touch}
.compare{width:100%;border-collapse:collapse;font-size:1rem;min-width:560px}
.compare th,.compare td{padding:18px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:middle}
.compare thead th{padding-block:24px 18px;font:400 1.75rem/1 var(--serif);letter-spacing:-.01em}
.compare thead th:first-child{width:44%}
.compare thead th+th{width:28%}
.compare tbody th{font-weight:400;color:var(--fg-2)}
.compare .us{background:color-mix(in srgb,var(--accent) 8%,transparent)}
.compare thead .us{border-radius:var(--r-card) var(--r-card) 0 0}
.compare tbody tr:last-child .us{border-radius:0 0 var(--r-card) var(--r-card)}
.compare td{font-weight:500}
.compare .muted{color:var(--muted);font-weight:400}
.yes,.no{display:inline-flex;align-items:center;gap:10px}
.yes::before,.no::before{content:"";flex:none;width:20px;height:20px;border-radius:50%}
.yes::before{background:var(--fg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M6 10.3l2.6 2.5L14 7.5' fill='none' stroke='%23F6F4EF' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/100% no-repeat}
@media (prefers-color-scheme:dark){.yes::before{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M6 10.3l2.6 2.5L14 7.5' fill='none' stroke='%230E0F13' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")}}
.no{color:var(--muted);font-weight:400}
.no::before{box-shadow:inset 0 0 0 1.5px var(--line-2);background:linear-gradient(var(--muted),var(--muted)) center/8px 1.5px no-repeat}
.footnote{margin-top:28px;font-size:.8125rem;color:var(--muted);max-width:80ch}

.faq-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:48px clamp(16px,2vw,28px)}
.faq-head{grid-column:1/span 4}
.faq-head h2{font-size:clamp(2.75rem,5.8vw,5.25rem);line-height:.98;letter-spacing:-.025em;margin:28px 0 24px}
.faq-head h2 em{color:var(--accent-display)}
.faq-head p{color:var(--muted);max-width:30ch}
.faq-head a{color:var(--accent-text);text-underline-offset:3px}
.faq-list{grid-column:6/-1;border-top:1px solid var(--fg)}
.faq-list details{border-bottom:1px solid var(--line)}
.faq-list summary{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:24px 0;cursor:pointer;list-style:none;font:400 clamp(1.375rem,2vw,1.75rem)/1.15 var(--serif);letter-spacing:-.01em}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"";flex:none;width:28px;height:28px;border-radius:50%;box-shadow:inset 0 0 0 1px var(--line-2);background:linear-gradient(var(--fg),var(--fg)) center/11px 1.5px no-repeat,linear-gradient(var(--fg),var(--fg)) center/1.5px 11px no-repeat;transition:transform .3s var(--ease)}
.faq-list details[open] summary::after{transform:rotate(45deg)}
.faq-list summary:hover{color:var(--accent-text)}
.faq-a{padding:0 0 28px;color:var(--fg-2);max-width:62ch}
.faq-a p+p,.faq-a p+ol,.faq-a ol+p{margin-top:12px}
.faq-a ol{padding-left:1.3em}
.faq-a li+li{margin-top:6px}
.faq-a a{color:var(--accent-text);text-underline-offset:3px}
.faq-list details::details-content{block-size:0;overflow:hidden;transition:block-size .35s var(--ease),content-visibility .35s allow-discrete}
.faq-list details[open]::details-content{block-size:auto}

.cta{position:relative;overflow:hidden;text-align:center;padding-block:clamp(112px,14vw,200px)}
.cta .rings{width:max(172vw,980px)}
.cta-inner{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center}
.cta h2{font-size:clamp(3.25rem,8vw,7.5rem);line-height:.94;letter-spacing:-.03em;margin:28px 0 26px}
.cta h2 em{color:var(--accent-display)}
.cta p{color:var(--fg-2);font-size:1.125rem;max-width:40ch}
.cta .price-line{align-items:center;margin:26px 0 34px}
.cta .label{justify-content:center}
.cta .price-line span{padding-left:0}
.cta .label::before{content:"";flex:0 0 40px;height:1px;background:var(--line-2)}

.site-footer{border-top:1px solid var(--line);padding-block:clamp(56px,7vw,88px) 32px;font-size:.9375rem}
.foot-top{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:40px clamp(16px,2vw,28px)}
.foot-brand{grid-column:1/span 4;display:flex;flex-direction:column;gap:16px;align-items:flex-start}
.foot-brand p{color:var(--muted);max-width:30ch}
.foot-col{grid-column:span 2}
.foot-col.addr{grid-column:span 4}
.foot-col h2{font:500 .75rem/1 var(--mono);text-transform:uppercase;letter-spacing:.09em;color:var(--muted);margin-bottom:18px}
.foot-col ul{list-style:none;display:grid;gap:10px}
.foot-col a{text-decoration:none;color:var(--fg-2)}
.foot-col a:hover{color:var(--fg);text-decoration:underline;text-underline-offset:3px}
.foot-col address{font-style:normal;color:var(--fg-2);line-height:1.7}
.foot-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin-top:clamp(48px,6vw,80px);padding-top:24px;border-top:1px solid var(--line);color:var(--muted);font-size:.875rem}

.page-head{padding-block:clamp(56px,8vw,112px) clamp(40px,5vw,64px)}
.page-head h1{font-size:clamp(3rem,7vw,6.25rem);line-height:.95;letter-spacing:-.028em;margin:28px 0 22px}
.page-head h1 em{color:var(--accent-display)}
.page-head p:not(.label){color:var(--muted);max-width:56ch;font-size:1.0625rem}
.page-head p.meta{font:400 .8125rem/1.5 var(--mono);color:var(--muted)}

.glance{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid var(--fg);margin-bottom:clamp(48px,6vw,80px)}
.glance div{padding:22px 20px 24px 0;border-bottom:1px solid var(--line)}
.glance div+div{padding-left:20px;border-left:1px solid var(--line)}
.glance b{display:block;font:400 1.5rem/1.1 var(--serif);letter-spacing:-.01em;margin-bottom:8px}
.glance span{font-size:.9375rem;color:var(--muted)}

.legal{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:48px clamp(16px,2vw,28px);padding-bottom:clamp(88px,10vw,140px)}
.toc{grid-column:1/span 3;position:sticky;top:104px;align-self:start;max-height:calc(100vh - 128px);overflow:auto}
.toc h2{font:500 .75rem/1 var(--mono);text-transform:uppercase;letter-spacing:.09em;color:var(--muted);margin-bottom:16px}
.toc ol{list-style:none;display:grid;gap:2px;counter-reset:toc}
.toc a{display:flex;gap:10px;padding:6px 0;font-size:.875rem;color:var(--fg-2);text-decoration:none;line-height:1.35}
.toc a::before{counter-increment:toc;content:counter(toc,decimal-leading-zero);font:400 .75rem/1.6 var(--mono);color:var(--muted)}
.toc a:hover{color:var(--fg)}
.prose{grid-column:5/-1;max-width:72ch;counter-reset:sec}
.prose>section+section{margin-top:clamp(48px,5vw,64px)}
.prose h2{font-size:clamp(1.875rem,3vw,2.5rem);line-height:1.05;letter-spacing:-.015em;margin-bottom:18px;display:flex;gap:16px;align-items:baseline}
.prose h2::before{counter-increment:sec;content:counter(sec,decimal-leading-zero);font:500 .8125rem/1 var(--mono);color:var(--accent-text);letter-spacing:.02em;transform:translateY(-.45em)}
.prose h3{font:600 1.0625rem/1.4 var(--sans);letter-spacing:0;margin:28px 0 8px}
.prose p,.prose li{color:var(--fg-2)}
.prose p+p,.prose p+ul,.prose ul+p,.prose p+ol,.prose ol+p,.prose ul+ul{margin-top:14px}
.prose ul,.prose ol{padding-left:1.25em}
.prose li+li{margin-top:8px}
.prose li::marker{color:var(--muted)}
.prose a{color:var(--accent-text);text-underline-offset:3px;overflow-wrap:anywhere}
.prose address{font-style:normal;line-height:1.7;color:var(--fg-2);padding:18px 20px;border-radius:var(--r-ctl);background:var(--bg-2);margin-top:14px}
.prose .note{margin-top:20px;padding:18px 20px;border-left:2px solid var(--accent);background:var(--bg-2);border-radius:0 var(--r-ctl) var(--r-ctl) 0}
.prose dl{display:grid;grid-template-columns:minmax(0,1fr);margin:16px 0 0;border-top:1px solid var(--line)}
.prose dl div{display:grid;grid-template-columns:minmax(0,14em) minmax(0,1fr);gap:4px 24px;padding:14px 0;border-bottom:1px solid var(--line)}
.prose dt{font-weight:500;color:var(--fg)}
.prose dd{margin:0;color:var(--fg-2)}

.support-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:48px clamp(16px,2vw,28px);padding-bottom:clamp(72px,9vw,120px)}
.contact-card{grid-column:1/span 5;align-self:start;padding:clamp(28px,3.5vw,44px);border-radius:var(--r-card);background:var(--fg);color:var(--bg)}
.contact-card h2{font-size:clamp(2.25rem,3.5vw,3rem);line-height:1;letter-spacing:-.02em;margin-bottom:16px}
.contact-card p{opacity:.8}
.contact-card .btn{margin-top:28px;background:var(--accent);color:var(--on-accent)}
.contact-card .tips-h{margin-top:32px;padding-top:22px;border-top:1px solid color-mix(in srgb,var(--bg) 18%,transparent);font:500 .75rem/1 var(--mono);text-transform:uppercase;letter-spacing:.09em;opacity:.65}
.contact-card ul{list-style:none;margin-top:16px;display:grid;gap:10px;font-size:.9375rem}
.contact-card li{display:flex;gap:12px;opacity:.85}
.contact-card li::before{content:"";flex:none;width:6px;height:6px;margin-top:.65em;border-radius:50%;background:var(--accent)}
.guides{grid-column:7/-1;display:grid;gap:clamp(40px,5vw,64px)}
.guide h2{font-size:clamp(2rem,3.2vw,2.75rem);line-height:1.02;letter-spacing:-.015em;margin:16px 0 18px}
.guide>p{color:var(--fg-2);max-width:56ch}
.guide ol{list-style:none;counter-reset:g;margin-top:20px;border-top:1px solid var(--line)}
.guide ol li{display:grid;grid-template-columns:44px 1fr;gap:12px;padding:16px 0;border-bottom:1px solid var(--line);color:var(--fg-2)}
.guide ol li::before{counter-increment:g;content:counter(g,decimal-leading-zero);font:500 .8125rem/1.9 var(--mono);color:var(--accent-text)}
.guide .tip{margin-top:18px;font-size:.9375rem;color:var(--muted)}
.guide a{color:var(--accent-text);text-underline-offset:3px}
kbd{font:500 .85em/1 var(--mono);padding:2px 6px;border-radius:6px;background:var(--bg-2);box-shadow:inset 0 0 0 1px var(--line);color:var(--fg)}

.notfound{min-height:72vh;display:grid;place-items:center;text-align:center;padding-block:80px;position:relative;overflow:hidden}
.notfound .rings{width:max(120vw,900px)}
.notfound-inner{position:relative;z-index:1}
.notfound h1{font-size:clamp(6rem,18vw,14rem);line-height:.85;letter-spacing:-.05em;color:var(--accent-display)}
.notfound p{font:400 clamp(1.5rem,3vw,2.25rem)/1.2 var(--serif);margin-top:20px}
.notfound p span{display:block;color:var(--muted)}
.notfound .actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:36px}

@media (prefers-reduced-motion:no-preference){
  .rise{animation:rise 1s var(--ease) both;animation-delay:calc(var(--d,0) * 90ms + 60ms)}
  .hero .phone{animation:phone-in 1.2s var(--ease) .2s both}
  .hero .rings circle{animation:ring-in 1.6s var(--ease) both;animation-delay:calc(var(--d,0) * 110ms + 250ms);transform-box:fill-box;transform-origin:center}
  .hero .rings text{animation:fade-in .8s ease both;animation-delay:calc(var(--d,0) * 110ms + 900ms)}
  .hero .ph-show{animation:show-answer 2s var(--ease) both}
  .hero .ph-reveal{animation:reveal .7s var(--ease) 1.75s both}
  @supports (animation-timeline:view()){
    .curve .live{stroke-dasharray:1;animation:draw linear both;animation-timeline:view();animation-range:entry 20% cover 55%}
    .curve .dot{animation:fade-in linear both;animation-timeline:view();animation-range:entry 40% cover 55%}
    .scroll-in{animation:rise-soft linear both;animation-timeline:view();animation-range:entry 0% entry 55%}
    .pc-bar i{animation:grow linear both;animation-timeline:view();animation-range:entry 30% cover 45%;transform-origin:left}
  }
}
@keyframes rise{from{opacity:0;transform:translateY(22px)}}
@keyframes rise-soft{from{opacity:0;transform:translateY(32px)}}
@keyframes phone-in{from{opacity:0;transform:translateY(40px) rotate(-1.5deg)}}
@keyframes ring-in{from{opacity:0;transform:scale(.86)}}
@keyframes fade-in{from{opacity:0}}
@keyframes reveal{from{opacity:0;transform:translateY(8px)}}
@keyframes show-answer{0%,70%{opacity:1;visibility:visible}100%{opacity:0;visibility:hidden}}
@keyframes draw{from{stroke-dashoffset:1}to{stroke-dashoffset:0}}
@keyframes grow{from{transform:scaleX(0)}}

@media (min-width:961px){
  .hero .rings{-webkit-mask-image:linear-gradient(90deg,transparent 4%,#000 34%);mask-image:linear-gradient(90deg,transparent 4%,#000 34%)}
}
@media (max-width:1080px){
  .nav{gap:22px}
  .ai-demo{position:static}
}
@media (max-width:960px){
  .nav{display:none}
  .header-end{margin-left:auto}
  .hero-grid{grid-template-columns:1fr;gap:56px}
  .hero-visual{--phone-w:min(272px,64vw);min-height:calc(var(--phone-w)*2.3)}
  .sec-head h2,.sec-head .lede{grid-column:1/-1}
  .feature-copy,.feature-visual,.feature-flip .feature-copy,.feature-flip .feature-visual{grid-column:1/-1;grid-row:auto}
  .ai-list,.ai-demo{grid-column:1/-1}
  .more{grid-template-columns:1fr 1fr}
  .more .wide{grid-column:1/-1}
  .screens{grid-template-columns:repeat(3,minmax(0,1fr))}
  .pricing-copy,.compare-price{grid-column:1/-1}
  .faq-head,.faq-list{grid-column:1/-1}
  .toc{display:none}
  .prose{grid-column:1/-1}
  .contact-card,.guides{grid-column:1/-1}
  .foot-brand{grid-column:1/-1}
  .foot-col{grid-column:span 4}
  .foot-col.addr{grid-column:span 4}
  .glance{grid-template-columns:1fr 1fr}
  .glance div:nth-child(3){padding-left:0;border-left:0}
}
@media (max-width:760px){
  .screens{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;gap:24px;margin-inline:calc(var(--gutter) * -1);padding:8px var(--gutter) 24px;scrollbar-width:none}
  .screens::-webkit-scrollbar{display:none}
  .screens figure{scroll-snap-align:center;--phone-w:min(250px,66vw)}
  .screens figure:nth-child(2){margin-top:0}
  .steps{grid-template-columns:1fr}
  .steps li::before{margin-bottom:20px}
  .more{grid-template-columns:1fr}
  .more>div{min-height:0}
  .more .wide-inner{grid-template-columns:1fr}
  .foot-col,.foot-col.addr{grid-column:span 6}
  .foot-col.addr{grid-column:1/-1}
  .prose dl div{grid-template-columns:1fr}
  .compare{min-width:0;font-size:.875rem}
  .compare th,.compare td{padding:14px 8px}
  .compare thead th{font-size:1.375rem}
  .compare thead th:first-child{width:40%}
  .yes,.no{gap:7px}
  .yes::before,.no::before{width:16px;height:16px}
  .cta .rings{width:1500px}
  .curve text{font-size:19px}
}
@media (max-width:520px){
  .header-inner{gap:12px;height:64px}
  .wordmark{font-size:1.625rem}
  .header-end .btn{display:none}
  .hero .label::after{display:none}
  .badge{height:50px;padding:0 16px 0 13px;gap:9px}
  .badge-big{font-size:1.1875rem}
  .badges{gap:10px}
  .import-visual{grid-template-columns:1fr;gap:28px}
  .flow{display:none}
  .file{width:150px;aspect-ratio:auto;min-height:150px}
  .fsrs-intervals{grid-template-columns:repeat(2,1fr)}
  .glance{grid-template-columns:1fr}
  .glance div+div{padding-left:0;border-left:0}
  .faq-list summary{padding:20px 0}
}
@media print{
  .site-header,.site-footer,.toc,.badges,.rings{display:none}
  body{background:#fff;color:#000}
}