:root{
  --ink:#15231a; --ink-2:#4b5a50; --ink-3:#6f7c73;
  --g9:#0f2e1e; --g8:#163d28; --g7:#23502c; --g5:#437737;
  --gold:#a67c2a; --gold-d:#85621f; --gold-l:#d9b56a;
  --paper:#f6f2e7; --paper-2:#eee8d8; --white:#fffdf8; --sage:#e5ebdd;
  --cream:#f6f2e7;
  --line:rgba(21,35,26,.14); --line-l:rgba(246,242,231,.16);
  --display:"Markazi Text", "Noto Naskh Arabic", serif;
  --sans:"IBM Plex Sans Arabic", system-ui, sans-serif;
  --wrap:1360px; --pad:40px; --sec:128px;
  --r:14px;
  --ease:cubic-bezier(.22,.8,.24,1);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
html.lenis,html.lenis body{height:auto}
.lenis.lenis-smooth{scroll-behavior:auto!important}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:18px;line-height:1.9;font-weight:400;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
.wrap{max-width:var(--wrap);margin-inline:auto;padding-inline:var(--pad)}
section{position:relative}
.sec{padding-block:var(--sec)}
.skip{position:absolute;inset-inline-start:-999px;top:8px;background:var(--g9);color:var(--cream);padding:8px 14px;border-radius:8px;z-index:100}
.skip:focus{inset-inline-start:16px}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px;border-radius:4px}

/* ---------- type ---------- */
h1,h2,h3{font-family:var(--display);font-weight:700;margin:0;letter-spacing:0;text-wrap:balance}
.h1{font-size:clamp(46px,6.1vw,96px);line-height:1.14;color:var(--g9)}
.h2{font-size:clamp(36px,3.7vw,56px);line-height:1.22;color:var(--g9)}
.lead{font-size:19px;line-height:1.95;color:var(--ink-2);max-width:36em;margin:0}
p{margin:0}
.tag{display:flex;align-items:center;gap:14px;font-size:14.5px;font-weight:600;color:var(--gold-d);margin:0 0 16px}
.tag .tr{font-family:var(--display);font-weight:600;font-size:21px;line-height:1;color:var(--gold-d);word-spacing:.18em}
.tag .bar{width:28px;height:1px;background:currentColor;opacity:.55}
.head{max-width:40em}
.head .lead{margin-top:18px}
.dark .h2,.dark .h1{color:var(--cream)}
.dark .lead{color:rgba(246,242,231,.78)}
.dark .tag,.dark .tag .tr{color:var(--gold-l)}

/* ---------- buttons: sweep-load hover ---------- */
.btn{position:relative;display:inline-flex;align-items:center;gap:10px;height:54px;padding:0 26px;border-radius:999px;font-weight:600;font-size:16.5px;line-height:1;overflow:hidden;isolation:isolate;transition:color .45s var(--ease),border-color .45s var(--ease);white-space:nowrap}
.btn::before{content:"";position:absolute;inset:0;z-index:-1;transform:scaleX(0);transform-origin:right center;transition:transform .55s var(--ease)}
.btn:hover::before,.btn:focus-visible::before{transform:scaleX(1)}
.btn svg{width:18px;height:18px;flex:none;transition:transform .45s var(--ease)}
.btn:hover svg.arr{transform:translateX(-4px)}
.btn-p{background:var(--g8);color:var(--cream)}
.btn-p::before{background:var(--gold-d)}
.btn-g{border:1.5px solid rgba(15,46,30,.35);color:var(--g9)}
.btn-g::before{background:var(--g9)}
.btn-g:hover,.btn-g:focus-visible{color:var(--cream);border-color:var(--g9)}
.dark .btn-p{background:var(--gold-l);color:var(--g9)}
.dark .btn-p::before{background:var(--cream)}
.dark .btn-g{border-color:rgba(246,242,231,.4);color:var(--cream)}
.dark .btn-g::before{background:var(--cream)}
.dark .btn-g:hover,.dark .btn-g:focus-visible{color:var(--g9);border-color:var(--cream)}
.actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.btn small{font-weight:500;font-size:13px;opacity:.7}
.link{display:inline-flex;align-items:center;gap:8px;font-weight:600;color:var(--g7);border-bottom:1.5px solid rgba(35,80,44,.3);padding-bottom:4px;transition:border-color .3s,color .3s,gap .3s var(--ease)}
.link:hover{border-color:var(--g7);gap:12px}
.link svg{width:16px;height:16px}
.dark .link{color:var(--gold-l);border-color:rgba(217,181,106,.4)}
.dark .link:hover{border-color:var(--gold-l)}

/* ---------- header ---------- */
.hdr{position:fixed;top:0;left:0;right:0;z-index:50;background:var(--paper);border-bottom:1px solid transparent;transition:border-color .3s,box-shadow .3s}
main{padding-top:124px}
.hdr.on{border-color:var(--line);box-shadow:0 10px 30px -24px rgba(15,46,30,.35)}
.hdr .wrap{display:flex;align-items:center;justify-content:space-between;height:124px;gap:28px;transition:height .45s var(--ease)}
.hdr.on .wrap{height:92px}
.brand{display:flex;align-items:center;gap:16px;flex:none}
.hdr .brand .logo{height:104px;width:auto;transition:height .45s var(--ease)}
.hdr.on .brand .logo{height:76px}
.nav{display:flex;align-items:center;gap:34px;font-size:16.5px;font-weight:500}
.nav a{position:relative;padding-block:6px;color:var(--ink)}
.nav a::after{content:"";position:absolute;inset-inline:0;bottom:0;height:1.5px;background:var(--gold);transform:scaleX(0);transform-origin:right;transition:transform .4s var(--ease)}
.nav a:hover::after{transform:scaleX(1)}
.hdr .btn{height:50px;padding:0 24px;font-size:15.5px}
.burger{display:none;width:46px;height:46px;border-radius:50%;border:1.5px solid var(--line);position:relative}
.burger i{position:absolute;inset-inline:13px;height:1.5px;background:var(--g9);transition:transform .4s var(--ease),opacity .3s}
.burger i:nth-child(1){top:17px}.burger i:nth-child(2){top:22.5px}.burger i:nth-child(3){top:28px}
.menu-open .burger i:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.menu-open .burger i:nth-child(2){opacity:0}
.menu-open .burger i:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}
.mmenu{position:fixed;inset:88px 0 0 0;background:var(--paper);z-index:49;padding:28px 16px 40px;display:flex;flex-direction:column;gap:6px;clip-path:inset(0 0 100% 0);transition:clip-path .55s var(--ease),visibility 0s .55s;visibility:hidden}
.menu-open .mmenu{clip-path:inset(0 0 0 0);visibility:visible;transition:clip-path .55s var(--ease)}
.mmenu a.ml{font-family:var(--display);font-weight:600;font-size:38px;line-height:1.5;color:var(--g9);border-bottom:1px solid var(--line);padding-block:6px;opacity:0;transform:translateY(10px);transition:opacity .4s,transform .5s var(--ease)}
.menu-open .mmenu a.ml{opacity:1;transform:none}
.menu-open .mmenu a.ml:nth-child(2){transition-delay:.05s}.menu-open .mmenu a.ml:nth-child(3){transition-delay:.1s}.menu-open .mmenu a.ml:nth-child(4){transition-delay:.15s}.menu-open .mmenu a.ml:nth-child(5){transition-delay:.2s}
.mmenu .actions{margin-top:24px}

/* ---------- 1 hero ---------- */
.hero{padding-block:56px 112px;background:var(--paper);border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.18fr) minmax(0,.82fr);gap:64px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:12px;font-size:15px;font-weight:600;color:var(--gold-d);margin-bottom:22px}
.eyebrow::before{content:"";width:28px;height:1px;background:currentColor;opacity:.6}
.hero .h1{max-width:9.6em}
.mark{position:relative;white-space:nowrap;z-index:0}
.mark::after{content:"";position:absolute;z-index:-1;inset-inline:0;bottom:.2em;height:.32em;background:rgba(217,181,106,.55);border-radius:3px;transform:scaleX(0);transform-origin:right;transition:transform 1.1s var(--ease) .65s}
.ready .mark::after{transform:scaleX(1)}
.hero .lead{margin-top:26px;max-width:31em}
.hero .actions{margin-top:36px}
.proof{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;margin-top:28px;font-size:14.5px;color:var(--ink-3);font-weight:500}
.proof span{display:inline-flex;align-items:center;gap:8px}
.proof span+span::before{content:"";width:4px;height:4px;border-radius:50%;background:var(--gold);margin-inline-end:8px}

.rootcard{position:relative;padding:34px 30px 26px;background:var(--white);border-radius:22px;box-shadow:0 1px 0 rgba(21,35,26,.05),0 30px 60px -38px rgba(15,46,30,.35)}
.rootcard .cap-top{display:flex;justify-content:space-between;align-items:baseline;gap:12px;font-size:13.5px;color:var(--ink-3);font-weight:500;margin-bottom:20px}
.rootcard .cap-top b{font-family:var(--display);font-size:22px;font-weight:600;color:var(--g9)}
.signs{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.sign .ph{aspect-ratio:3/4;border-radius:12px;overflow:hidden;background:var(--paper);display:flex;align-items:flex-end;justify-content:center;padding:12px 8px 0}
.sign img{width:100%;height:100%;object-fit:contain;object-position:bottom}
.sign .ltr{display:block;text-align:center;font-family:var(--display);font-weight:700;font-size:58px;line-height:1;color:var(--g7);margin-top:14px}
.sign .nm{display:block;text-align:center;font-size:13px;color:var(--ink-3);margin-top:6px}
.rootcard .brace{position:relative;height:16px;margin:16px 6px 0;border:1.5px solid var(--gold);border-top:0;border-radius:0 0 10px 10px}
.rootcard .brace span{position:absolute;inset-inline:0;margin-inline:auto;width:max-content;bottom:-14px;background:var(--white);padding-inline:10px;font-size:13px;font-weight:600;color:var(--gold-d)}
.rootcard .src{margin-top:30px;padding-top:14px;border-top:1px solid var(--line);font-size:12.5px;line-height:1.7;color:var(--ink-3)}

/* ---------- 2 gap ---------- */
.gap{background:var(--white)}
.split{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:80px;align-items:center}
.gap .body{margin-top:22px;color:var(--ink-2);max-width:33em}
.gap .support{margin-top:22px;padding-inline-start:20px;border-inline-start:2px solid var(--gold);font-family:var(--display);font-size:27px;line-height:1.55;font-weight:500;color:var(--g7)}
.gap .actions{margin-top:30px}
.lesson{position:relative;background:var(--paper);border-radius:22px;padding:64px 48px 56px}
.lesson .lbl{font-size:13px;font-weight:600;color:var(--ink-3);margin-bottom:34px;display:flex;align-items:center;gap:10px}
.lesson .lbl::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--g5)}
.sentence{font-family:var(--display);font-weight:600;font-size:clamp(34px,3.4vw,50px);line-height:1.9;color:var(--g9);text-wrap:balance}
.blank{position:relative;display:inline-block;min-width:3.6em;text-align:center;border-bottom:2.5px dashed var(--gold);color:var(--gold-d);line-height:1.2;margin-inline:.12em}
.blank em{font-style:normal;font-size:.8em}
.blank .note{position:absolute;bottom:calc(100% + 18px);inset-inline-start:50%;transform:translateX(50%);white-space:nowrap;font-family:var(--sans);font-size:13.5px;font-weight:600;color:var(--ink-2);background:var(--white);border:1px solid var(--line);padding:6px 12px;border-radius:8px;line-height:1.4}
.blank .note::after{content:"";position:absolute;top:100%;inset-inline-start:50%;width:1px;height:14px;background:var(--line);transform:translateX(50%)}
.known{display:flex;gap:10px;flex-wrap:wrap;margin-top:34px;padding-top:22px;border-top:1px solid var(--line)}
.known span{font-size:14px;color:var(--ink-3)}
.known b{font-weight:600;color:var(--g7)}

/* ---------- 3 root (signature) ---------- */
.root{background:var(--g9);color:var(--cream);overflow:hidden}
.root .split{align-items:end}
.root .body{color:rgba(246,242,231,.78);max-width:34em}
.root .body + .actions{margin-top:28px}
.machine{margin-top:76px;border-top:1px solid var(--line-l);padding-top:64px}
.eq{display:grid;grid-template-columns:auto auto auto auto minmax(0,1fr);align-items:center;gap:28px}
.tile{position:relative;border:1px solid rgba(217,181,106,.35);border-radius:18px;padding:22px 28px 18px;text-align:center;transition:transform .6s var(--ease)}
.tile .t{display:block;font-family:var(--display);font-weight:700;font-size:54px;line-height:1.2;white-space:nowrap}
.tile small,.word-wrap small{display:block;font-size:13px;font-weight:600;color:rgba(246,242,231,.55);margin-top:6px}
.tile.rt .t{color:var(--gold-l);word-spacing:.22em}
.tile.pt{min-width:210px}
.tile.pt .t .r{color:var(--gold-l)}
.tile.pt .t .p{color:var(--cream)}
.op{font-family:var(--display);font-size:46px;line-height:1;color:rgba(246,242,231,.4)}
.word-wrap{text-align:center}
.word{display:block;font-family:var(--display);font-weight:700;font-size:clamp(96px,11vw,176px);line-height:1.05;white-space:nowrap}
.word .r{color:var(--gold-l);transition:color .4s}
.word .p{color:var(--cream);transition:color .5s .25s}
.word.in .p{color:transparent;transition:none}
.slide .tile.rt{transform:translateX(-14px)}
.slide .tile.pt{transform:translateX(14px)}
.derive{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:56px}
.dv{position:relative;text-align:start;padding:24px 26px 26px;border-radius:var(--r);background:rgba(246,242,231,.05);border:1px solid var(--line-l);transition:background .35s,border-color .35s}
.dv:hover{background:rgba(246,242,231,.09)}
.dv[aria-pressed="true"]{background:rgba(217,181,106,.12);border-color:rgba(217,181,106,.55)}
.dv b{display:block;font-family:var(--display);font-weight:700;font-size:40px;line-height:1.25;color:var(--cream)}
.dv span{display:block;font-size:15.5px;color:rgba(246,242,231,.7);margin-top:4px}
.dv i{position:absolute;inset-inline-end:22px;top:26px;width:10px;height:10px;border-radius:50%;border:1.5px solid rgba(246,242,231,.35);transition:background .3s,border-color .3s}
.dv[aria-pressed="true"] i{background:var(--gold-l);border-color:var(--gold-l)}
.legend{display:flex;gap:22px;margin-top:22px;font-size:13.5px;color:rgba(246,242,231,.6)}
.legend span{display:inline-flex;align-items:center;gap:8px}
.legend span::before{content:"";width:12px;height:12px;border-radius:3px;background:var(--gold-l)}
.legend span+span::before{background:var(--cream)}

/* ---------- 4 rules ---------- */
.rules{background:var(--paper)}
.rules-head{display:flex;justify-content:space-between;align-items:end;gap:40px}
.four{display:grid;grid-template-columns:repeat(4,1fr);margin-top:64px;border-top:1px solid var(--line)}
.rule{padding:34px 28px 8px;border-inline-start:1px solid var(--line)}
.rule:first-child{border-inline-start:0;padding-inline-start:0}
.rule:last-child{padding-inline-end:0}
.demo{height:216px;display:flex;flex-direction:column;justify-content:flex-end;align-items:flex-start;margin-bottom:28px}
.demo .cap{font-size:13px;line-height:1.6;color:var(--ink-3);margin-top:12px;font-weight:500}
.d-tree .rk{font-family:var(--display);font-weight:600;font-size:22px;color:var(--gold-d);word-spacing:.2em;padding-bottom:10px;margin-bottom:10px;border-bottom:1px solid var(--line);width:100%}
.d-tree .vs{font-family:var(--display);font-weight:700;font-size:38px;line-height:1.35;color:var(--g9)}
.d-tree .vs span{display:block}
.d-tree .vs span:nth-child(2){color:var(--g7);opacity:.85}
.d-tree .vs span:nth-child(3){color:var(--g5);opacity:.85}
.d-vow .row{display:flex;gap:10px;align-items:flex-end}
.d-vow figure{margin:0;width:78px;text-align:center}
.d-vow img{width:100%;height:auto}
.d-vow figcaption{font-family:var(--display);font-weight:600;font-size:19px;line-height:1.2;color:var(--g7);margin-top:6px}
.d-draw{flex-direction:row!important;align-items:flex-end!important;gap:14px;flex-wrap:wrap;align-content:flex-end}
.d-draw .fig{width:96px}
.d-draw .nt{width:150px;padding-bottom:6px}
.d-draw .cap{flex-basis:100%}
.d-path ol{list-style:none;margin:0;padding:0;width:100%}
.d-path li{position:relative;display:flex;align-items:center;gap:12px;font-family:var(--display);font-weight:600;font-size:30px;line-height:1.5;color:var(--g9);padding-inline-start:24px}
.d-path li::before{content:"";position:absolute;inset-inline-start:0;width:11px;height:11px;border-radius:50%;border:2px solid var(--g5);background:var(--paper)}
.d-path li:last-child::before{background:var(--g5)}
.d-path li+li::after{content:"";position:absolute;inset-inline-start:5.5px;bottom:calc(50% + 7px);height:32px;width:1.5px;background:var(--g5);opacity:.5}
.d-path li:nth-child(2){color:var(--g7)}
.rule h3{font-family:var(--display);font-weight:700;font-size:29px;line-height:1.3;color:var(--g9);min-height:2.6em}
.rule p{margin-top:10px;font-size:16.5px;line-height:1.85;color:var(--ink-2)}

/* ---------- 5 paths ---------- */
.paths{background:var(--white)}
.paths .head{max-width:46em}
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:18px;margin-top:60px}
.card{grid-column:span 6;position:relative;display:flex;flex-direction:column;border-radius:20px;padding:30px 32px 28px;background:var(--paper);border:1px solid transparent;transition:background .4s,border-color .4s,transform .5s var(--ease);min-height:330px}
.card:hover{background:var(--paper-2);transform:translateY(-3px)}
.card .meta{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}
.card .aud{font-size:14px;font-weight:600;color:var(--ink-3);padding-top:8px}
.card .dur{font-family:var(--display);font-weight:700;font-size:34px;line-height:1.1;color:var(--gold-d);text-align:end}
.card .dur small{display:block;font-family:var(--sans);font-size:12.5px;font-weight:500;color:var(--ink-3);margin-top:4px}
.card h3{margin-top:auto;padding-top:40px;font-family:var(--display);font-weight:700;font-size:34px;line-height:1.25;color:var(--g9);max-width:12em}
.card p{margin-top:10px;font-size:16.5px;line-height:1.85;color:var(--ink-2);max-width:30em}
.card .go{display:flex;align-items:center;gap:8px;margin-top:22px;padding-top:18px;border-top:1px solid var(--line);font-size:15px;font-weight:600;color:var(--g7)}
.card .go svg{width:16px;height:16px;transition:transform .45s var(--ease)}
.card:hover .go svg{transform:translateX(-6px)}
.card.alt{background:var(--g8);color:var(--cream)}
.card.alt:hover{background:var(--g9)}
.card.alt .aud,.card.alt .dur small{color:rgba(246,242,231,.62)}
.card.alt .dur{color:var(--gold-l)}
.card.alt h3{color:var(--cream)}
.card.alt p{color:rgba(246,242,231,.78)}
.card.alt .go{color:var(--gold-l);border-color:var(--line-l)}
.flag{display:inline-block;font-size:12.5px;font-weight:600;color:var(--g9);background:var(--gold-l);border-radius:6px;padding:3px 10px;line-height:1.6;margin-bottom:10px}
.guides{grid-column:span 12;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);border-radius:20px;overflow:hidden;background:var(--sage)}
.guides .gl{padding:38px 40px 36px}
.guides .gl .meta{display:flex;align-items:center;gap:14px;font-size:14px;font-weight:600;color:var(--ink-3)}
.guides .free{font-family:var(--display);font-size:30px;font-weight:700;color:var(--g7);line-height:1}
.guides h3{margin-top:26px;font-family:var(--display);font-weight:700;font-size:38px;line-height:1.25;color:var(--g9)}
.guides p{margin-top:10px;font-size:16.5px;color:var(--ink-2);max-width:30em}
.guides .actions{margin-top:28px;gap:22px}
.guides .gr{padding:34px 36px 30px;background:var(--white);border-radius:16px;margin:10px}
.toc-h{display:flex;justify-content:space-between;align-items:baseline;gap:16px;font-size:14px;font-weight:600;color:var(--ink-3);padding-bottom:14px;border-bottom:1px solid var(--line)}
.toc-h b{font-family:var(--display);font-size:24px;color:var(--g9);font-weight:700}
.toc-h span{white-space:nowrap}
.toc{list-style:none;margin:0;padding:0;counter-reset:t}
.toc li{counter-increment:t;display:flex;gap:16px;align-items:baseline;padding-block:11px;border-bottom:1px solid var(--line);font-size:16px;line-height:1.6;color:var(--ink)}
.toc li::before{content:counter(t,arabic-indic);font-family:var(--display);font-weight:700;font-size:20px;color:var(--gold-d);min-width:20px}
.toc li.more{color:var(--ink-3);border-bottom:0}
.toc li.more::before{content:"…"}

/* ---------- 6 founder ---------- */
.founder{background:var(--sage)}
.f-grid{display:grid;grid-template-columns:minmax(0,.62fr) minmax(0,1fr);gap:72px;align-items:start}
.portrait{position:sticky;top:120px;margin:0}
.portrait .ph{aspect-ratio:4/5;border-radius:20px;overflow:hidden;background:#050505;box-shadow:0 30px 60px -40px rgba(15,46,30,.55)}
.portrait .ph img{width:100%;height:100%;object-fit:cover}
.portrait figcaption{margin-top:16px;font-size:14.5px;color:var(--ink-2)}
.portrait figcaption b{display:block;font-family:var(--display);font-weight:700;font-size:26px;color:var(--g9);line-height:1.3}
.founder .body{margin-top:22px;color:var(--ink-2);max-width:36em}
.founder .support{margin-top:18px;font-family:var(--display);font-size:26px;line-height:1.55;font-weight:500;color:var(--g7);max-width:22em}
.creds{list-style:none;margin:28px 0 0;padding:0;display:grid;gap:10px}
.creds li{display:flex;gap:12px;font-size:15.5px;line-height:1.7;color:var(--ink)}
.creds li::before{content:"";flex:none;width:7px;height:7px;margin-top:10px;border-radius:2px;background:var(--gold);transform:rotate(45deg)}
.founder .actions{margin-top:30px;gap:26px}
.tl{list-style:none;margin:64px 0 0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line)}
.tl li{padding:24px 0 26px;padding-inline-end:28px;border-bottom:1px solid var(--line)}
.tl li:nth-child(3n+2),.tl li:nth-child(3n){padding-inline-start:28px;border-inline-start:1px solid var(--line)}
.tl .y{display:block;font-family:var(--display);font-weight:700;font-size:40px;line-height:1;color:var(--gold-d);margin-bottom:12px}
.tl p{font-size:15.5px;line-height:1.75;color:var(--ink-2)}
.quotes{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:18px;margin-top:72px}
.q{margin:0;border-radius:20px;padding:40px 42px 34px;display:flex;flex-direction:column}
.q.big{background:var(--g8);color:var(--cream)}
.q.sm{background:var(--white)}
.q .qm{font-family:var(--display);font-size:90px;line-height:.6;height:36px;color:var(--gold-l)}
.q.sm .qm{color:var(--gold)}
.q blockquote{margin:0;font-family:var(--display);font-weight:600;line-height:1.55}
.q.big blockquote{font-size:clamp(28px,2.5vw,38px)}
.q.sm blockquote{font-size:25px;color:var(--g9)}
.q figcaption{margin-top:auto;padding-top:28px;font-size:14px;line-height:1.7}
.q figcaption b{display:block;font-size:15.5px;font-weight:600}
.q.big figcaption{color:rgba(246,242,231,.72)}
.q.big figcaption b{color:var(--cream)}
.q.sm figcaption{color:var(--ink-3)}
.q.sm figcaption b{color:var(--ink)}

/* ---------- 7 faq ---------- */
.faq{background:var(--paper)}
.faq-grid{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:80px;align-items:start}
.faq-side{position:sticky;top:120px}
.faq-side .mail{margin-top:22px;font-size:15px;color:var(--ink-3)}
.faq-side .mail a{color:var(--g7);font-weight:600;border-bottom:1px solid rgba(35,80,44,.3)}
.qa{border-top:1px solid var(--line)}
.qa:last-child{border-bottom:1px solid var(--line)}
.qa button{width:100%;display:flex;justify-content:space-between;align-items:center;gap:24px;padding:26px 0;text-align:start;font-family:var(--display);font-weight:600;font-size:27px;line-height:1.4;color:var(--g9)}
.qa .pm{position:relative;flex:none;width:40px;height:40px;border-radius:50%;border:1.5px solid var(--line);transition:background .35s,border-color .35s}
.qa .pm::before,.qa .pm::after{content:"";position:absolute;inset:0;margin:auto;width:14px;height:1.5px;background:var(--g9);transition:transform .45s var(--ease),background .35s}
.qa .pm::after{transform:rotate(90deg)}
.qa button:hover .pm{border-color:var(--g9)}
.qa.open .pm{background:var(--g9);border-color:var(--g9)}
.qa.open .pm::before,.qa.open .pm::after{background:var(--cream)}
.qa.open .pm::after{transform:rotate(0)}
.ans{display:grid;grid-template-rows:0fr;transition:grid-template-rows .5s var(--ease)}
.qa.open .ans{grid-template-rows:1fr}
.ans>div{overflow:hidden}
.ans p{padding:0 0 28px;max-width:36em;color:var(--ink-2);font-size:17.5px}

/* ---------- 8 cta ---------- */
.cta{background:var(--g9);color:var(--cream);overflow:hidden}
.reel{padding-block:30px;border-bottom:1px solid var(--line-l);overflow:hidden}
.reel .track{display:flex;gap:14px;width:max-content;direction:ltr;animation:reel 70s linear infinite}
.reel:hover .track{animation-play-state:paused}
@keyframes reel{from{transform:translateX(-50%)}to{transform:translateX(0)}}
.reel figure{margin:0;width:78px;flex:none}
.reel .ph{aspect-ratio:3/4;border-radius:10px;overflow:hidden;background:var(--cream);display:flex;align-items:flex-end;justify-content:center;padding:8px 6px 0}
.reel img{width:100%;height:100%;object-fit:contain;object-position:bottom}
.reel figcaption{text-align:center;font-family:var(--display);font-weight:700;font-size:24px;line-height:1;margin-top:9px;color:var(--gold-l)}
.reel-cap{display:flex;justify-content:space-between;gap:16px;font-size:13px;color:rgba(246,242,231,.55);margin-top:18px}
.cta-in{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:64px;align-items:end;padding-block:104px 112px}
.cta .h2{max-width:14em}
.cta .lead{max-width:30em}

/* ---------- footer ---------- */
.ftr{background:var(--paper);color:var(--ink-2);padding-block:72px 32px;font-size:15px}
.f-top{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,1fr));gap:48px;align-items:start}
.f-logo{display:block;width:300px}
.f-logo img{width:100%;height:auto}
.motto{margin-top:20px;font-family:var(--display);font-size:22px;line-height:1.7;color:var(--gold-d);max-width:18em}
.ftr h4{margin:0 0 16px;font-size:13.5px;font-weight:600;color:var(--ink-3)}
.ftr ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.ftr ul a{transition:color .3s}
.ftr ul a{color:var(--ink)}
.ftr ul a:hover{color:var(--g7)}
.f-bot{display:flex;justify-content:space-between;gap:20px;margin-top:64px;padding-top:24px;border-top:1px solid var(--line);font-size:13.5px;color:var(--ink-3)}

/* ---------- reveal ---------- */
.js .rv{opacity:0;transform:translateY(22px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.js .rv.in{opacity:1;transform:none}
.js .hero .seq{opacity:0;transform:translateY(18px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.js .ready .seq{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.01ms!important;animation:none!important}
  .js .rv,.js .hero .seq{opacity:1;transform:none}
  .mark::after{transform:scaleX(1)}
}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .nav{display:none}
  .burger{display:block}
  .hdr .btn.hide-m{display:none}
  .eq{grid-template-columns:auto auto auto;row-gap:24px}
  .eq .op.eqs{display:none}
  .word-wrap{grid-column:1/-1;text-align:start;border-top:1px solid var(--line-l);padding-top:24px}
  .four{grid-template-columns:repeat(2,1fr)}
  .rule:nth-child(odd){border-inline-start:0;padding-inline-start:0}
  .rule:nth-child(even){padding-inline-end:0}
  .rule{padding-bottom:40px}
}
@media (max-width:980px){
  :root{--sec:96px;--pad:28px}
  .hero-grid,.split,.f-grid,.faq-grid,.cta-in{grid-template-columns:1fr;gap:48px}
  .rootcard{max-width:520px}
  .portrait,.faq-side{position:static}
  .portrait{max-width:420px}
  .card{grid-column:span 12;min-height:0}
  .guides{grid-template-columns:1fr}
  .quotes{grid-template-columns:1fr}
  .rules-head{flex-direction:column;align-items:flex-start}
}
@media (max-width:640px){
  :root{--sec:76px;--pad:16px}
  body{font-size:17px}
  main{padding-top:80px}
  .hdr .wrap,.hdr.on .wrap{height:80px}
  .hdr .brand{align-self:flex-start;align-items:flex-start;height:80px}
  .hdr .brand .logo{height:108px;margin-top:8px;transition:height .45s var(--ease),margin .45s var(--ease)}
  .hdr.on .brand .logo,.menu-open .hdr .brand .logo{height:64px;margin-top:8px}
  .hero{padding-top:64px}


  .rootcard{padding:24px 18px 20px}
  .sign .ltr{font-size:46px}
  .btn{height:52px;padding:0 22px;font-size:16px}
  .lesson{padding:52px 20px 32px}
  .blank .note{font-size:12.5px}
  .tile{padding:16px 16px 12px}
  .tile .t{font-size:38px}
  .op{font-size:32px}
  .eq{gap:12px}
  .derive{grid-template-columns:1fr;gap:10px;margin-top:36px}
  .dv{padding:16px 20px}
  .dv b{font-size:32px}
  .four{grid-template-columns:1fr}
  .rule,.rule:nth-child(n){padding:30px 0 10px;border-inline-start:0;border-bottom:1px solid var(--line)}
  .rule h3{min-height:0}
  .rule:last-child{border-bottom:0}
  .demo{height:auto;min-height:150px}
  .card{padding:24px 22px 22px}
  .card h3{font-size:29px;padding-top:28px}
  .card .dur{font-size:26px}
  .tile.pt{min-width:0}
  .guides .gl{padding:28px 22px}
  .guides .gr{padding:24px 20px}
  .guides h3{font-size:31px}
  .tl{grid-template-columns:1fr}
  .tl li,.tl li:nth-child(n){padding-inline:0;border-inline-start:0}
  .q{padding:30px 24px 26px}
  .q.sm blockquote{font-size:22px}
  .qa button{font-size:23px;padding:22px 0}
  .f-top{grid-template-columns:1fr 1fr}
  .f-top>div:first-child{grid-column:1/-1}
  .f-bot{flex-direction:column}
  .reel figure{width:64px}
  .f-logo{width:240px}
}