/* land2/style.css — лендинги v2 */
:root{--bg:#03252a;--bg2:#06343a;--fg:#e6fbfb;--mut:rgba(230,251,251,.64);--ac:#2fd3c7;--ac2:#ffc35a;--acf:#03252a;--card:#0a3d43;--line:rgba(230,251,251,.13);--fd:Unbounded,sans-serif;--fb:Onest,sans-serif;--wd:800;--ls:-.04em;--r:22px;--maxw:1240px}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;background:var(--bg)}
html.lenis,html.lenis body{height:auto}
body{background:var(--bg);color:var(--fg);font-family:var(--fb);font-size:17px;line-height:1.55;-webkit-font-smoothing:antialiased;transition:background .4s,color .4s}
main{overflow-x:clip}
img,svg,canvas{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit;color:inherit}
[hidden]{display:none!important}
::selection{background:var(--ac);color:var(--acf)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
.dsp{font-family:var(--fd);font-weight:var(--wd);letter-spacing:var(--ls);line-height:1.02}
.ac{color:var(--ac)}
.fx{font-family:"Times New Roman",Georgia,serif;font-style:italic;font-weight:400;letter-spacing:0}
.mono{font-family:ui-monospace,"JetBrains Mono",monospace}
.sec{padding:110px 0}
@media(max-width:800px){.sec{padding:76px 0}.wrap{padding:0 18px}body{font-size:16px}}
.wd{display:inline-block;overflow:hidden;vertical-align:top;padding:0 .08em .1em 0;margin:0 -.08em -.1em 0}.wd>span{display:inline-block}

/* кнопки */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;height:56px;padding:0 28px;border-radius:999px;font-weight:700;font-size:16px;background:var(--ac);color:var(--acf);white-space:nowrap;position:relative;overflow:hidden;isolation:isolate;transition:color .3s,box-shadow .3s}
.btn:after{content:"";position:absolute;inset:0;background:var(--fg);transform:translateY(101%);transition:transform .45s cubic-bezier(.7,0,.2,1);z-index:-1}
.btn:hover:after{transform:none}.btn:hover{color:var(--bg)}
.btn.gh{background:transparent;color:var(--fg);box-shadow:inset 0 0 0 2px var(--line)}
.btn.sm{height:42px;padding:0 18px;font-size:14px}
.lnk{display:inline-flex;gap:8px;align-items:center;font-weight:700;color:var(--ac);border-bottom:2px solid currentColor;padding-bottom:2px}
.pill{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:99px;font-size:13px;font-weight:700;background:color-mix(in srgb,var(--ac) 15%,transparent);color:var(--ac)}
.pill:before{content:"";width:7px;height:7px;border-radius:50%;background:currentColor;animation:blink 1.6s infinite}
@keyframes blink{50%{opacity:.25}}

/* навигация */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;transition:transform .45s cubic-bezier(.7,0,.2,1),background .3s}
.nav-in{max-width:var(--maxw);margin:0 auto;padding:16px 28px;display:flex;align-items:center;gap:26px}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--fd);font-weight:800;font-size:18px;letter-spacing:-.02em}
.logo i{width:34px;height:34px;border-radius:10px;background:var(--ac);color:var(--acf);display:grid;place-items:center;font-style:normal;font-family:Georgia,serif;font-weight:900;font-size:20px}
.nav-l{display:flex;gap:24px;margin-left:auto;font-size:15px;font-weight:600}
.nav-l a{opacity:.72;transition:opacity .2s}.nav-l a:hover{opacity:1}
.nav-cta{height:44px;padding:0 22px;font-size:14px}
.nav.solid{background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:blur(10px);box-shadow:0 1px 0 var(--line)}
.nav.hide{transform:translateY(-110%)}
.n-min .nav-l{display:none}.n-min .nav-cta{margin-left:auto}
.n-pill{top:12px}.n-pill .nav-in{max-width:1000px;background:color-mix(in srgb,var(--card) 90%,transparent);border-radius:99px;padding:8px 8px 8px 20px;box-shadow:inset 0 0 0 1px var(--line),0 10px 30px rgba(0,0,0,.15);backdrop-filter:blur(10px)}
.n-pill.solid{background:none;box-shadow:none;backdrop-filter:none}
.burger{display:none;width:44px;height:44px;border-radius:50%;box-shadow:inset 0 0 0 2px var(--line);margin-left:auto}
.burger b{display:block;width:18px;height:2px;background:currentColor;margin:5px auto;transition:transform .3s}
.mm-on .burger b:first-child{transform:translateY(3.5px) rotate(45deg)}.mm-on .burger b:last-child{transform:translateY(-3.5px) rotate(-45deg)}
.mm{position:fixed;inset:0;z-index:45;background:var(--bg);display:flex;flex-direction:column;justify-content:center;gap:10px;padding:30px;opacity:0;pointer-events:none;transition:opacity .35s}
.mm.on{opacity:1;pointer-events:auto}
.mm a{font-family:var(--fd);font-weight:var(--wd);font-size:36px;letter-spacing:var(--ls)}.mm .btn{font-family:var(--fb);font-size:16px;margin-top:20px;align-self:flex-start}
@media(max-width:900px){.nav-l,.nav-cta{display:none}.burger{display:block}.nav-in{padding:12px 18px}}

/* палитра «Цвета» */
.pal{position:fixed;right:18px;bottom:18px;z-index:80}
.pal-b{display:flex;align-items:center;gap:8px;height:52px;padding:0 18px 0 14px;border-radius:99px;background:var(--fg);color:var(--bg);font-weight:700;font-size:14px;box-shadow:0 10px 30px rgba(0,0,0,.3);transition:transform .3s}
.pal-b:hover{transform:translateY(-2px)}
.pal-b svg{animation:spin 8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}
.pal-p{position:absolute;right:0;bottom:64px;width:330px;max-height:min(70vh,560px);overflow:auto;padding:18px;border-radius:20px;background:var(--card);color:var(--fg);box-shadow:0 30px 70px rgba(0,0,0,.4),inset 0 0 0 1px var(--line);opacity:0;transform:translateY(12px) scale(.97);transform-origin:bottom right;pointer-events:none;transition:opacity .25s,transform .3s cubic-bezier(.2,.8,.2,1)}
.pal.on .pal-p{opacity:1;transform:none;pointer-events:auto}
.pal-h{display:flex;justify-content:space-between;align-items:center;margin:4px 0 10px}.pal-h b{font-size:13px;letter-spacing:.1em;text-transform:uppercase;opacity:.7}
.pal-t{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:14px}
.pal-t button{display:flex;flex-direction:column;align-items:center;gap:5px;font-size:11px;font-weight:600;padding:6px 2px;border-radius:12px}
.pal-t i{width:38px;height:38px;border-radius:50%;box-shadow:0 0 0 2px var(--line)}
.pal-t button.on i{box-shadow:0 0 0 3px var(--fg)}
.pal-a{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.pal-a button{width:30px;height:30px;border-radius:50%;box-shadow:0 0 0 2px var(--line)}
.pal-a button.on{box-shadow:0 0 0 2px var(--card),0 0 0 4px var(--fg)}
.pal-a .auto{font-size:12px;font-weight:800;background:var(--bg)}
.pal-r{width:100%;height:40px;border-radius:12px;box-shadow:inset 0 0 0 1.5px var(--line);font-weight:600;font-size:13px}
@media(max-width:600px){.pal{right:12px;bottom:12px}.pal-b span{display:none}.pal-b{padding:0 14px}.pal-p{width:calc(100vw - 24px)}}

/* курсор */
.cur:not(li){position:fixed;left:0;top:0;width:34px;height:34px;margin:-17px 0 0 -17px;border-radius:50%;border:1.5px solid var(--ac);pointer-events:none;z-index:90;opacity:0;transition:opacity .3s,width .25s,height .25s,margin .25s,background .25s}
.cur.on{opacity:1}.cur.big{width:70px;height:70px;margin:-35px 0 0 -35px;background:color-mix(in srgb,var(--ac) 15%,transparent)}

/* заголовки секций */
.sh{margin-bottom:44px;max-width:780px}
.sh.h-c{text-align:center;margin-left:auto;margin-right:auto}
.sk{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--ac);margin-bottom:18px}
.sk:before{content:"";width:26px;height:2px;background:currentColor}
.sh h2{font-size:clamp(34px,5vw,68px)}
.sh p{margin-top:16px;font-size:clamp(16px,1.5vw,20px);color:var(--mut);max-width:620px}
.sh.h-c p{margin-left:auto;margin-right:auto}

/* ── герои ── */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;padding:110px 0 60px;overflow:hidden}
.h-h{font-size:clamp(40px,5.6vw,84px);margin:20px 0 22px}
.h-p{font-size:clamp(17px,1.5vw,21px);color:var(--mut);max-width:560px;margin-bottom:32px}
.h-btns{display:flex;gap:12px;flex-wrap:wrap}.h-btns.c{justify-content:center}
.hsplit{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center;width:100%}
.hsplit.rev>div:first-child{order:2}
.hv{position:relative;display:flex;justify-content:center;align-items:center;min-height:480px}
.hf{position:relative;z-index:2;text-align:center;display:flex;flex-direction:column;align-items:center;width:100%}
.hf .h-p{margin-left:auto;margin-right:auto}.hf .h-h{max-width:1000px}
@media(max-width:1000px){.hsplit{grid-template-columns:1fr}.hsplit.rev>div:first-child{order:0}.hv{min-height:360px}}

/* mega */
.hero.mega{display:block;min-height:0;padding:0;overflow:visible}
.hm{height:240vh;position:relative}
.hm-st{position:sticky;top:0;height:100vh;overflow:hidden;display:flex;align-items:center;justify-content:center}
.hm-word{position:absolute;display:flex;flex-direction:column;align-items:center;font-size:clamp(110px,26vw,400px);line-height:.82;letter-spacing:-.06em;will-change:transform;white-space:nowrap}
.hm-line .hm-word{font-size:clamp(70px,18vw,300px)}.hm-line em{font-style:normal;margin:0 .05em}
.hm-num .hm-word,.hm-sum .hm-word{font-size:clamp(180px,40vw,620px)}
.hm-word.ol span{color:transparent;-webkit-text-stroke:2px var(--fg)}.hm-word.ol span.ac{-webkit-text-stroke-color:var(--ac)}
.hm-in{position:relative;z-index:2;width:100%;max-width:var(--maxw);padding:0 28px;display:flex;flex-direction:column}
.hm-c{align-items:center;text-align:center}.hm-c .h-p{margin-left:auto;margin-right:auto}.hm-c .h-btns{justify-content:center}
.hm-l{align-items:flex-start}.hm-r{align-items:flex-end;text-align:right}.hm-r .h-btns{justify-content:flex-end}
.hm-b{align-self:flex-end;margin-top:auto;padding-bottom:70px;align-items:flex-start;height:100%;justify-content:flex-end}
.hm-in .h-h{max-width:960px}
.hm-sc{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);font-size:13px;color:var(--mut);letter-spacing:.1em}
@media(max-width:700px){.hm{height:200vh}.hm-r{align-items:flex-start;text-align:left}.hm-r .h-btns{justify-content:flex-start}}

/* countdown */
.hc{width:100%}
.hc-n{font-size:clamp(130px,22vw,340px);line-height:.82;letter-spacing:-.06em;color:var(--ac);display:flex;align-items:flex-end;gap:16px}
.hc-n small{font-size:clamp(14px,1.4vw,20px);letter-spacing:0;line-height:1.2;color:var(--fg);margin-bottom:.6em;font-family:var(--fb);font-weight:700}
.hc-clock{font-size:clamp(18px,2vw,26px);letter-spacing:.12em;color:var(--mut);margin:14px 0 26px}
.hc-c{text-align:center;display:flex;flex-direction:column;align-items:center}.hc-c .h-p{margin:0 auto 32px}.hc-c .hc-n{justify-content:center}
.hc-split{display:grid;grid-template-columns:1.1fr 1fr;gap:40px;align-items:center}
.hc-cal{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}
.hc-cg .hc-n{font-size:clamp(90px,12vw,180px)}
.cal{display:grid;grid-template-columns:repeat(7,1fr);gap:8px;max-width:420px}
.cal i{aspect-ratio:1;border-radius:10px;background:var(--card);box-shadow:inset 0 0 0 1px var(--line);position:relative}
.cal i.x:after{content:"";position:absolute;left:20%;right:20%;top:50%;height:2px;background:var(--mut);transform:rotate(-40deg)}
.cal i.t{background:var(--ac)}
@media(max-width:900px){.hc-split,.hc-cal{grid-template-columns:1fr}}

/* orbit */
.ho{position:relative;width:540px;height:540px;contain:layout paint}
.ho-r{position:absolute;left:50%;top:50%;border-radius:50%;border:1.5px dashed var(--line);will-change:transform}
.ho-r.r1{width:520px;height:520px;margin:-260px 0 0 -260px;animation:spin 70s linear infinite}
.ho-r.r2{width:300px;height:300px;margin:-150px 0 0 -150px;animation:spin 45s linear infinite reverse}
.ho-it{position:absolute;left:50%;top:50%;width:124px;margin:-34px 0 0 -62px;transform:rotate(var(--a)) translateX(260px) rotate(calc(var(--a) * -1))}
.ho-it>div{animation:spin 70s linear infinite reverse}
.ho-it .cv{border-radius:12px;box-shadow:0 0 0 1px var(--line)}
.ho-tag{position:absolute;left:50%;top:50%;margin:-18px 0 0 -35px;transform:rotate(var(--a)) translateX(150px) rotate(calc(var(--a) * -1))}
.ho-tag i{display:grid;place-items:center;width:70px;height:36px;border-radius:99px;background:var(--card);box-shadow:inset 0 0 0 1px var(--line);font-style:normal;font-weight:800;font-size:13px;animation:spin 45s linear infinite}
.ho-c{position:absolute;left:50%;top:50%;width:120px;height:120px;margin:-60px 0 0 -60px;border-radius:32px;background:var(--ac);color:var(--acf);display:grid;place-items:center;font-size:72px;font-family:Georgia,serif}
.ho-bg{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:.35;transform:scale(1.5)}
.hv .ho{transform:scale(.92)}
@media(max-width:600px){.hv .ho{transform:scale(.6)}.hv{min-height:340px;margin:-40px 0}.ho-bg{transform:scale(1)}}

/* columns */
.hcl{display:grid;gap:14px;height:640px;overflow:hidden;width:100%;-webkit-mask:linear-gradient(transparent,#000 14%,#000 86%,transparent);mask:linear-gradient(transparent,#000 14%,#000 86%,transparent)}
.hcl-3{grid-template-columns:repeat(3,1fr)}.hcl-2{grid-template-columns:repeat(2,1fr)}
.hcl-col{overflow:hidden}
.hcl-col>div{display:flex;flex-direction:column;gap:14px;animation:colup 40s linear infinite;will-change:transform}
.hcl-col.up>div{animation-direction:reverse;animation-duration:48s}
.hcl.paused .hcl-col>div{animation-play-state:paused}
@keyframes colup{to{transform:translateY(-50%)}}
.hcl-bg{position:absolute;inset:0;display:flex;justify-content:center;opacity:.28}
.hcl-bg .hcl{height:100%;max-width:1400px;grid-template-columns:repeat(3,1fr)}
.hcl-f{background:radial-gradient(closest-side,var(--bg) 40%,transparent);padding:40px 0}
@media(max-width:1000px){.hcl{height:420px}}

/* graph */
.hg-full{position:absolute;inset:0;width:100%;height:100%}
.hg-c{position:relative;z-index:2;width:100%}.hg-c .h-h{max-width:760px}
.hg-f{display:inline-block;margin-top:28px;font-size:22px;padding:12px 20px;border-radius:14px;background:var(--card);box-shadow:inset 0 0 0 1px var(--line)}
.hg-f b{color:var(--ac);font-weight:400}
.hg-card{position:relative;width:100%;aspect-ratio:1.1;border-radius:var(--r);background:var(--card);box-shadow:inset 0 0 0 1px var(--line),0 30px 80px rgba(0,0,0,.25);overflow:hidden}
.hg-card .hg-cv{width:100%;height:100%}.hg-card .hg-f{position:absolute;left:16px;bottom:16px;margin:0}
.hero.graph:has(.hg-band){flex-direction:column;justify-content:center;gap:30px}
.hg-band{position:relative;width:100%;height:340px}.hg-band .hg-cv{width:100%;height:100%}.hg-band .hg-f{position:absolute;left:50%;bottom:16px;transform:translateX(-50%);margin:0}
.hg-top .h-h{font-size:clamp(36px,4.6vw,70px)}
@media(max-width:700px){.hg-full{opacity:.35}}

/* ── карточка урока ── */
.lc{border-radius:16px;overflow:hidden;background:var(--card);box-shadow:inset 0 0 0 1px var(--line);flex-shrink:0;user-select:none}
.cv{aspect-ratio:290/160;position:relative;overflow:hidden}
.cv img{width:100%;height:100%;object-fit:cover;pointer-events:none;-webkit-user-drag:none}
.cv-t{position:absolute;left:16px;bottom:12px;color:#fff;font-style:normal;font-size:22px;opacity:.85}
.lc-t{padding:11px 14px 14px}
.lc-t span{display:block;font-size:11px;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--mut);margin-bottom:3px}
.lc-t b{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;font-family:var(--fd);font-weight:700;font-size:14px;line-height:1.25;letter-spacing:-.01em}

/* цифры */
.stl{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);margin-top:60px}
.stl>div{padding:28px 20px 0 0}
.stl b{display:block;font-size:clamp(36px,4.6vw,66px)}
.stl span{color:var(--mut);font-size:14px}
@media(max-width:700px){.stl{grid-template-columns:1fr 1fr;gap:10px 0}}

/* ── уроки вживую ── */
.dm{display:grid;grid-template-columns:1.5fr 1fr;gap:0;border-radius:var(--r);background:var(--card);box-shadow:inset 0 0 0 1px var(--line);overflow:hidden}
.dm-cv{position:relative;min-height:400px;border-right:1px solid var(--line)}
.dm-cv canvas{position:absolute;inset:0;width:100%;height:100%;touch-action:pan-y}
.dm-c{padding:28px;display:flex;flex-direction:column;gap:16px;justify-content:center}
.dm-f{font-size:28px;margin-bottom:6px}
.dm-c label{display:grid;grid-template-columns:34px 1fr 48px;align-items:center;gap:12px}
.dm-c label span{font-size:22px}
.dm-c output{font-weight:700;font-variant-numeric:tabular-nums;text-align:right}
.dm-o{min-height:52px;padding:12px 14px;border-radius:12px;background:color-mix(in srgb,var(--ac) 12%,transparent);font-weight:600;font-size:15px;line-height:1.4}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:6px;border-radius:9px;background:var(--line);outline:none}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:24px;height:24px;border-radius:50%;background:var(--ac);box-shadow:0 0 0 5px color-mix(in srgb,var(--ac) 25%,transparent);cursor:grab}
input[type=range]::-moz-range-thumb{width:24px;height:24px;border:0;border-radius:50%;background:var(--ac);cursor:grab}
.dm-tabs{display:flex;gap:8px;overflow-x:auto;padding-bottom:6px;margin-bottom:18px;scrollbar-width:none}
.dm-tabs::-webkit-scrollbar{display:none}
.dm-tabs button{flex-shrink:0;text-align:left;padding:12px 16px;border-radius:14px;box-shadow:inset 0 0 0 1.5px var(--line);transition:background .25s,color .25s}
.dm-tabs b{display:block;font-size:14px}.dm-tabs small{font-size:12px;color:var(--mut)}
.dm-tabs button.on{background:var(--ac);color:var(--acf);box-shadow:none}.dm-tabs button.on small{color:inherit;opacity:.75}
.dm-pane{display:none}.dm-pane.on{display:block}
.dm-ttl{display:none}
.dmw-side{display:grid;grid-template-columns:280px 1fr;gap:24px}
.dmw-side .dm-tabs{flex-direction:column;overflow:visible;margin:0}
.dmw-side .dm-tabs button{padding:16px 18px}
.dm-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.dm-card header{padding:0 4px 12px}.dm-card header b{display:block;font-family:var(--fd);font-weight:700;font-size:18px}.dm-card header small{color:var(--mut);font-size:13px}
.dm-grid .dm{grid-template-columns:1fr}.dm-grid .dm-cv{min-height:260px;border-right:0;border-bottom:1px solid var(--line)}.dm-grid .dm-c{padding:18px;gap:10px}.dm-grid .dm-f{font-size:20px}.dm-grid .dm-o{font-size:13px;min-height:44px}
.les-more{margin-top:30px}
@media(max-width:900px){.dm{grid-template-columns:1fr}.dm-cv{min-height:300px;border-right:0;border-bottom:1px solid var(--line)}.dm-side{grid-template-columns:1fr}.dmw-side .dm-tabs{flex-direction:row;overflow-x:auto}.dm-grid{grid-template-columns:1fr}.dm-c{padding:20px}}

/* ── тренажёр экзамена ── */
.ex-app{border-radius:var(--r);background:var(--card);box-shadow:inset 0 0 0 1px var(--line);overflow:hidden}
.ex-top{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:14px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.ex-tabs{display:flex;gap:4px;padding:4px;border-radius:99px;background:color-mix(in srgb,var(--fg) 7%,transparent)}
.ex-tabs button{padding:10px 18px;border-radius:99px;font-weight:700;font-size:14px;white-space:nowrap;transition:background .25s,color .25s}
.ex-tabs button.on{background:var(--ac);color:var(--acf)}
.ex-meta{display:flex;gap:20px;font-size:13px;color:var(--mut);padding-right:6px}.ex-meta b{color:var(--fg)}
.ex-body{display:grid;grid-template-columns:300px 1fr;min-height:560px}
.ex-nums{border-right:1px solid var(--line);padding:12px;display:grid;grid-template-columns:repeat(4,1fr);gap:6px;align-content:start;max-height:640px;overflow:auto}
.ex-nums button{display:flex;flex-direction:column;align-items:flex-start;padding:10px 8px;border-radius:12px;background:color-mix(in srgb,var(--fg) 5%,transparent);text-align:left;transition:background .2s,color .2s,transform .2s}
.ex-nums button b{font-family:var(--fd);font-weight:800;font-size:17px;letter-spacing:-.02em}
.ex-nums button span{display:none}
.ex-nums button.p2{box-shadow:inset 0 0 0 1.5px color-mix(in srgb,var(--ac2) 70%,transparent)}
.ex-nums button:hover{transform:translateY(-2px)}
.ex-nums button.on{background:var(--ac);color:var(--acf)}
.ex-task{padding:28px;min-width:0}
.ex-load{color:var(--mut);padding:40px 0}
.ex-h{display:flex;gap:16px;align-items:center;margin-bottom:18px}
.ex-n{font-size:34px;color:var(--ac)}
.ex-tn{font-weight:700;font-size:17px;line-height:1.3}.ex-tn small{display:block;font-weight:500;font-size:13px;color:var(--mut)}
.ex-q{font-size:18px;line-height:1.55;margin-bottom:18px;overflow-x:auto}
.ex-story{font-size:15px;color:var(--mut);margin-bottom:12px;max-height:180px;overflow:auto;padding-right:6px}
.ex-fig{margin-top:14px;display:flex;flex-wrap:wrap;gap:12px;background:#fff;border-radius:14px;padding:12px;width:max-content;max-width:100%;color:#111}
.ex-fig svg,.ex-fig img{max-width:100%;height:auto}
.ex-f{display:flex;gap:10px;flex-wrap:wrap}
.ex-f input{flex:1;min-width:150px;height:56px;border-radius:14px;border:0;background:color-mix(in srgb,var(--fg) 7%,transparent);padding:0 18px;font-size:19px;font-weight:700;outline:none}
.ex-f input:focus{box-shadow:inset 0 0 0 2px var(--ac)}
.ex-r{min-height:26px;margin:12px 0 6px;font-weight:700}.ex-r.ok{color:var(--ac)}.ex-r.no{color:#ff6b6b}
.ex-act{display:flex;gap:10px;flex-wrap:wrap}
.ex-sol ol{list-style:none;counter-reset:s;display:flex;flex-direction:column;gap:8px;margin-top:16px}
.ex-sol li{counter-increment:s;display:grid;grid-template-columns:28px 1fr;gap:12px;padding:12px 14px;border-radius:12px;background:color-mix(in srgb,var(--fg) 5%,transparent);font-size:15px;overflow-x:auto}
.ex-sol li:before{content:counter(s);width:26px;height:26px;border-radius:50%;background:var(--ac);color:var(--acf);display:grid;place-items:center;font-size:12px;font-weight:800}
.ex-ans{margin-top:10px;padding:14px;border-radius:12px;background:var(--ac);color:var(--acf);font-weight:700}
.exm-stack .ex-body{grid-template-columns:1fr}
.exm-stack .ex-nums{border-right:0;border-bottom:1px solid var(--line);grid-template-columns:repeat(auto-fill,minmax(150px,1fr));max-height:none}
.exm-stack .ex-nums button span{display:block;font-size:11px;line-height:1.25;margin-top:4px;opacity:.75}
.exm-stack .ex-task{max-width:860px;margin:0 auto;width:100%}
.katex{font-size:1.06em}
@media(max-width:900px){.ex-body{grid-template-columns:1fr}.ex-nums{border-right:0;border-bottom:1px solid var(--line);grid-template-columns:repeat(6,1fr);max-height:none}.exm-stack .ex-nums{grid-template-columns:repeat(3,1fr)}.ex-task{padding:20px}.ex-meta{display:none}}
@media(max-width:480px){.ex-nums{grid-template-columns:repeat(5,1fr)}.ex-tabs button{padding:9px 12px;font-size:13px}}

/* ── материалы ── */
.lib-c{display:flex;gap:40px;flex-wrap:wrap;margin:-10px 0 34px}
.lib-c span{color:var(--mut);font-size:14px}.lib-c b{display:block;font-size:44px;color:var(--fg)}
.lib-k{display:flex;flex-wrap:wrap;gap:10px;margin-top:34px}
.lib-k span{display:inline-flex;gap:8px;align-items:center;padding:10px 16px;border-radius:99px;box-shadow:inset 0 0 0 1.5px var(--line);font-weight:600;font-size:14px}
.lib-k svg{color:var(--ac)}
/* рулетка */
.ring-w{position:relative}
.ring-st{height:430px;perspective:2200px;display:flex;align-items:center;justify-content:center;cursor:grab;touch-action:pan-y;outline:none;overflow:hidden;-webkit-mask:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);mask:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent)}
.ring-st.drag{cursor:grabbing}
.ring{position:relative;width:250px;height:230px;transform-style:preserve-3d;will-change:transform}
.ring-i{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden}
.ring-i .lc{transition:box-shadow .3s}
.ring-i.on .lc{box-shadow:0 0 0 2px var(--ac),0 30px 60px rgba(0,0,0,.3)}
.ring-ctl{display:flex;align-items:center;justify-content:center;gap:14px;margin-top:6px;padding:0 18px}
.rb{width:50px;height:50px;border-radius:50%;display:grid;place-items:center;box-shadow:inset 0 0 0 1.5px var(--line);transition:background .2s,color .2s;flex-shrink:0}
.rb:hover{background:var(--ac);color:var(--acf);box-shadow:none}
.ring-cap{text-align:center;min-width:0;width:340px;max-width:60vw}
.ring-cap b{display:block;font-family:var(--fd);font-weight:700;font-size:17px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.ring-cap span{font-size:13px;color:var(--mut)}
@media(max-width:600px){.ring-st{height:320px}.ring{width:190px;height:180px}.ring-ctl{gap:8px}.rb{width:44px;height:44px}}
/* лента */
.rol{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;gap:16px;padding-bottom:10px;scrollbar-width:none;cursor:grab}
.rol::-webkit-scrollbar{display:none}
.rol.drag{cursor:grabbing;scroll-snap-type:none}
.rol-t{display:contents}
.rol-i{flex:0 0 270px;scroll-snap-align:start}
.rol-ctl{display:flex;align-items:center;gap:14px;margin-top:18px}
.rol-bar{flex:1;height:4px;border-radius:4px;background:var(--line);overflow:hidden}.rol-bar i{display:block;height:100%;background:var(--ac);transform-origin:left;transition:transform .15s}
/* поиск */
.srch-i{display:flex;align-items:center;gap:12px;height:62px;padding:0 20px;border-radius:18px;background:var(--card);box-shadow:inset 0 0 0 1.5px var(--line)}
.srch-i:focus-within{box-shadow:inset 0 0 0 2px var(--ac)}
.srch-i input{flex:1;border:0;background:none;outline:none;font-size:18px;min-width:0}
.srch-f{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0}
.srch-f button{padding:9px 16px;border-radius:99px;font-weight:700;font-size:13px;box-shadow:inset 0 0 0 1.5px var(--line)}
.srch-f button.on{background:var(--fg);color:var(--bg);box-shadow:none}
.srch-n{font-size:14px;color:var(--mut);margin-bottom:14px}
.srch-g{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
@media(max-width:900px){.srch-g{grid-template-columns:1fr 1fr}}

/* ── доска ── */
.brd-g{display:grid;grid-template-columns:1.6fr 1fr;gap:36px;align-items:start}
.brd-wide .brd-g{grid-template-columns:1fr}.brd-wide .brd-l{display:flex;flex-wrap:wrap;gap:8px}.brd-wide .brd-l li{border:0;padding:10px 16px;border-radius:99px;box-shadow:inset 0 0 0 1.5px var(--line);font-size:14px}.brd-wide .brd-cv{height:500px}
.brd-app{border-radius:var(--r);overflow:hidden;background:var(--card);box-shadow:inset 0 0 0 1px var(--line)}
.brd-bar{display:flex;gap:4px;padding:10px;border-bottom:1px solid var(--line);align-items:center;flex-wrap:wrap}
.bt{display:flex;flex-direction:column;align-items:center;gap:3px;padding:8px 10px;border-radius:12px;font-size:11px;font-weight:600;color:var(--mut)}
.bt:hover{color:var(--fg);background:color-mix(in srgb,var(--fg) 6%,transparent)}
.bt.on{background:var(--ac);color:var(--acf)}
.brd-cols{display:flex;gap:8px;margin-left:auto;padding-right:6px}
.brd-cols i{width:22px;height:22px;border-radius:50%;cursor:pointer;box-shadow:0 0 0 2px var(--card)}
.brd-cols i:nth-child(1){background:var(--ac)}.brd-cols i:nth-child(2){background:var(--ac2)}.brd-cols i:nth-child(3){background:var(--fg)}
.brd-cols i.on{box-shadow:0 0 0 2px var(--card),0 0 0 4px var(--fg)}
.brd-cv{position:relative;height:430px;cursor:crosshair}
.brd-cv canvas{width:100%;height:100%}
.brd-hint{position:absolute;left:50%;bottom:18px;transform:translateX(-50%);padding:8px 16px;border-radius:99px;background:var(--fg);color:var(--bg);font-size:13px;font-weight:600;pointer-events:none;transition:opacity .4s;white-space:nowrap}
.brd-hint.off{opacity:0}
.brd-fn{display:flex;gap:10px;align-items:center;padding:12px;border-top:1px solid var(--line)}
.brd-fn span{font-size:20px;padding-left:6px}
.brd-fn input{flex:1;min-width:0;height:46px;border-radius:12px;border:0;background:color-mix(in srgb,var(--fg) 6%,transparent);padding:0 14px;font-family:"Times New Roman",serif;font-style:italic;font-size:19px;outline:none}
.brd-fn input:focus{box-shadow:inset 0 0 0 2px var(--ac)}.brd-fn input.bad{box-shadow:inset 0 0 0 2px #ff6b6b}
.brd-l{list-style:none}
.brd-l li{display:flex;gap:12px;align-items:flex-start;padding:15px 0;border-bottom:1px solid var(--line);font-weight:600}
.brd-l svg{color:var(--ac);flex-shrink:0;margin-top:3px}
@media(max-width:900px){.brd-g{grid-template-columns:1fr}.brd-cv,.brd-wide .brd-cv{height:340px}.bt span{display:none}}

/* ── тарифы / вопросы ── */
.prc-g{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.prc-c{padding:30px;border-radius:var(--r);background:var(--card);box-shadow:inset 0 0 0 1px var(--line);display:flex;flex-direction:column}
.prc-c.hot{background:var(--ac);color:var(--acf)}.prc-c.hot li svg{color:inherit}
.prc-c.hot .btn{background:var(--acf);color:var(--ac)}.prc-c.hot .btn:after{background:var(--bg)}.prc-c.hot .btn:hover{color:var(--fg)}
.prc-c h3{font-size:20px}
.prc-p{display:flex;align-items:baseline;gap:8px;margin:14px 0 20px}.prc-p b{font-size:58px}.prc-p span{opacity:.65;font-size:14px}
.prc-c ul{list-style:none;display:flex;flex-direction:column;gap:10px;flex:1;margin-bottom:24px}
.prc-c li{display:flex;gap:10px;font-size:15px}.prc-c li svg{color:var(--ac);flex-shrink:0;margin-top:3px}
@media(max-width:900px){.prc-g{grid-template-columns:1fr}}
.fq-w{display:grid;grid-template-columns:1fr 1.3fr;gap:50px;align-items:start}
.fq details{border-bottom:1px solid var(--line)}
.fq summary{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:22px 0;cursor:pointer;list-style:none;font-weight:700;font-size:18px}
.fq summary::-webkit-details-marker{display:none}
.fq summary i{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;box-shadow:inset 0 0 0 1.5px var(--line);flex-shrink:0;transition:transform .35s,background .3s}
.fq details[open] summary i{transform:rotate(45deg);background:var(--ac);color:var(--acf);box-shadow:none}
.fq p{padding:0 50px 22px 0;color:var(--mut)}
@media(max-width:900px){.fq-w{grid-template-columns:1fr;gap:10px}}

/* ── финал ── */
.fin-b h2{font-size:clamp(46px,8.6vw,132px);line-height:.95}
.fb-r{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-top:36px;flex-wrap:wrap}.fb-r p{font-size:19px;color:var(--mut)}.fb-r b{color:var(--fg)}
.fin-c{height:200vh;position:relative}
.fc-st{position:sticky;top:0;height:100vh;overflow:hidden;display:flex;align-items:center;justify-content:center}
.fc-dot{position:absolute;left:50%;top:50%;width:240vmax;height:240vmax;margin:-120vmax 0 0 -120vmax;border-radius:50%;background:var(--ac);will-change:transform}
.fc-in{position:relative;text-align:center;color:var(--acf)}
.fc-in h2{font-size:clamp(38px,7vw,104px);line-height:1;margin-bottom:36px}
.fc-in .btn{background:var(--acf);color:var(--ac)}.fc-in .btn:after{background:var(--fg)}
.fin-m{padding:60px 0}
.fm{display:block;overflow:hidden;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:26px 0;transition:background .4s,color .4s}
.fm:hover{background:var(--ac);color:var(--acf)}
.fm-t{white-space:nowrap;font-size:clamp(56px,9vw,150px);line-height:1}.fm-t i{font-style:normal;color:var(--ac)}.fm:hover .fm-t i{color:inherit}

/* ── подвал ── */
.ft{background:var(--fg);color:var(--bg);padding:72px 0 28px;position:relative;z-index:1}
.ft a{opacity:.72;transition:opacity .2s}.ft a:hover{opacity:1}.ft .logo{opacity:1}
.ft-cols{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;padding-bottom:44px}
.ft-b p{opacity:.65;margin-top:14px;max-width:320px;font-size:15px}
.ft nav{display:flex;flex-direction:column;gap:10px;font-size:15px}
.ft nav b{font-size:12px;letter-spacing:.14em;text-transform:uppercase;opacity:.5;margin-bottom:4px}
.ft-bot{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:24px;border-top:1px solid color-mix(in srgb,var(--bg) 18%,transparent);font-size:13px}
.ft-word{font-size:clamp(46px,15.4vw,248px);line-height:.8;letter-spacing:-.05em;white-space:nowrap;overflow:hidden;text-align:center;padding:10px 0 30px;color:var(--ac)}
.ft-word span{display:inline-block}
.ft.card{background:none;color:var(--fg);padding:16px}
.ft-box{background:var(--fg);color:var(--bg);border-radius:calc(var(--r) * 1.4);padding:56px 48px 26px}
.ft-hero{display:flex;justify-content:space-between;align-items:center;gap:24px;padding-bottom:44px;margin-bottom:44px;border-bottom:1px solid color-mix(in srgb,var(--bg) 18%,transparent);flex-wrap:wrap}
.ft-hero h2{font-size:clamp(30px,4.2vw,58px);max-width:640px}
.ft .btn{background:var(--ac);color:var(--acf);opacity:1}
@media(max-width:900px){.ft-cols{grid-template-columns:1fr 1fr}.ft-b{grid-column:1/-1}.ft-box{padding:36px 22px 22px}}
@media(prefers-reduced-motion:reduce){.hm-sc i,.hero.sky.ready .sk-word .ch b{animation:none!important}}
.ho-it>div,.ho-tag i{will-change:transform}
.hcl-bg .hcl{-webkit-mask:none;mask:none}
.hcl-bg:after{content:"";position:absolute;inset:0;background:linear-gradient(var(--bg),transparent 18%,transparent 82%,var(--bg))}
.hcl-col>div{backface-visibility:hidden}
.hcl .lc{box-shadow:none}
.hcl-bg{opacity:1}
.hcl-bg:after{background:linear-gradient(var(--bg),color-mix(in srgb,var(--bg) 70%,transparent) 18%,color-mix(in srgb,var(--bg) 70%,transparent) 82%,var(--bg))}
.ho-bg{opacity:1}.ho-bg:after{content:"";position:absolute;inset:-50%;background:color-mix(in srgb,var(--bg) 65%,transparent)}
.hg-card{box-shadow:inset 0 0 0 1px var(--line)}
.hv .ho{transform:scale(.8)}
@media(max-width:1200px){.hv .ho{transform:scale(.68)}}
@media(max-width:600px){.hv .ho{transform:scale(.58)}}
.hsplit>div:not(.hv){min-width:0}
.hg-c>.h-h,.hg-c>.h-p{text-shadow:0 0 18px var(--bg),0 0 6px var(--bg)}
.hg-c::before{content:"";position:absolute;left:-40px;top:-40px;width:min(780px,100%);bottom:-40px;background:radial-gradient(closest-side,color-mix(in srgb,var(--bg) 80%,transparent),transparent);z-index:-1;pointer-events:none}
@media(max-width:1000px){.hsplit,.hc-split,.hc-cal{grid-template-columns:minmax(0,1fr)}}
@media(max-width:600px){.h-h{font-size:clamp(34px,10vw,48px)}.h-btns .btn{flex:1 1 100%}.lib-c{gap:22px}.lib-c b{font-size:32px}.ex-q{font-size:16px}}
.ho{contain:none}
@media(max-width:1000px){.hsplit.rev>div:first-child{order:2}.hero{overflow:hidden}}
@media(max-width:600px){.hv{min-height:330px;margin:-30px 0;overflow:visible}}
/* ═══════════ land3 — дополнения ═══════════ */
.pill:before{animation:none}
/* герой 2-3 */
.hm-wc{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;pointer-events:none}
.hm-word{position:relative;display:block;line-height:.82}
.hw-a,.hw-b{display:flex;align-items:center;justify-content:center;white-space:nowrap}
.hm-stack .hw-a,.hm-stack .hw-b{flex-direction:column}
.hw-b{position:absolute;inset:0;clip-path:inset(0 100% 0 0)}
.hm-word.ol .hw-a .ch{color:transparent;-webkit-text-stroke:2px var(--fg)}
.hm-word.ol .hw-a .ac .ch,.hm-word.ol .hw-a .dot{-webkit-text-stroke-color:var(--ac)}
.hm-word .g{display:inline-flex}
.hm-word .ch,.hm-word .dot{display:inline-block;font-style:normal;will-change:transform}
.hm-line .hm-word{font-size:clamp(64px,17.5vw,290px)}
.hm-stack .hm-word{font-size:clamp(100px,24vw,370px)}
.hm-line .dot{margin:0 .04em}
.hero.mega .ch,.hero.mega .dot,.hm-sub{opacity:0;transform:translateY(40%);transition:opacity .9s cubic-bezier(.2,.8,.2,1),transform 1.1s cubic-bezier(.2,.8,.2,1);transition-delay:calc(var(--i,0) * 45ms)}
.hero.mega.in .ch,.hero.mega.in .dot{opacity:1;transform:none}
.hero.mega.in .hm-sub{opacity:1;transform:none;transition-delay:.55s}
.hero.mega.in.past .ch,.hero.mega.in .hm-word[style*="scale"] .ch{transition:none}
.hmm-scatter.hm .ch,.hmm-curtain.hm .ch{transition-property:opacity}
.hero.mega.in .hmm-scatter .ch,.hero.mega.in .hmm-curtain .ch{transition:opacity .9s;transition-delay:calc(var(--i,0) * 45ms)}
.hm-sub{margin-top:clamp(18px,2.6vw,38px);font-family:var(--fd);font-weight:600;font-size:clamp(15px,1.7vw,24px);letter-spacing:-.01em;color:var(--mut);text-align:center;padding:0 20px}
.hm-in{opacity:0;will-change:transform,opacity}
.hm-sc{display:flex;flex-direction:column;align-items:center;gap:10px;font-size:12px;letter-spacing:.18em;text-transform:uppercase}
.hm-sc i{width:2px;height:38px;border-radius:2px;background:linear-gradient(var(--fg),transparent);transform-origin:top;animation:scl 1.8s cubic-bezier(.7,0,.2,1) infinite}
@keyframes scl{0%{transform:scaleY(0)}50%{transform:scaleY(1);transform-origin:top}51%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}
.hm{height:230vh}
@media(max-width:700px){.hm{height:190vh}.hm-sub{font-size:14px}}
/* ── виджеты ── */
.dm-sub{display:inline-flex;align-items:center;gap:7px;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--mut)}
.dm-sub:before{content:"";width:9px;height:9px;border-radius:3px;background:var(--sc)}
.dm-card{display:flex;flex-direction:column;transition:transform .45s cubic-bezier(.2,.8,.2,1)}
.dm-card header{display:flex;flex-direction:column;gap:4px;padding:0 4px 12px}
.dm-card header b{font-family:var(--fd);font-weight:700;font-size:20px;letter-spacing:-.02em}
.dm-card .dm{flex:1}
.dm-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.dm-grid .dm{grid-template-columns:1fr;grid-template-rows:auto 1fr}
.dm-grid .dm-cv{min-height:300px}
.dmg-bento{grid-template-columns:1.25fr 1fr}
.dmg-bento .dm-card:nth-child(4n+1),.dmg-bento .dm-card:nth-child(4n+4){grid-column:auto}
.dmg-bento .dm-card:nth-child(2),.dmg-bento .dm-card:nth-child(3){}
.dmg-bento .dm-card:nth-child(2) .dm-cv,.dmg-bento .dm-card:nth-child(3) .dm-cv{min-height:300px}
.dmg-bento .dm-card:nth-child(4n+1) .dm-cv{min-height:340px}
.dm-cv{position:relative;overflow:hidden}
.dm-cv canvas{cursor:default}
.dm-hint{position:absolute;left:14px;top:14px;display:inline-flex;align-items:center;gap:7px;padding:7px 12px;border-radius:99px;background:var(--fg);color:var(--bg);font-size:12px;font-weight:700;pointer-events:none;transition:opacity .4s,transform .4s;animation:hint 2.4s ease-in-out infinite}
@keyframes hint{50%{transform:translateY(-3px)}}
.dm.touched .dm-hint{opacity:0;transform:translateY(-8px)}
.dm-f{font-size:22px;min-height:38px;overflow-x:auto;overflow-y:hidden}
.dm-f .katex{font-size:1.05em}
.dm-l{font-size:20px;display:flex;align-items:center}
.dm-c label{grid-template-columns:30px 1fr 52px}
.dm-b{display:flex;gap:8px;flex-wrap:wrap}
.dm-o{display:flex;flex-direction:column;gap:4px;min-height:74px;justify-content:center}
.dm-ot{font-size:17px;overflow-x:auto;overflow-y:hidden;min-height:24px}
.dm-os{font-size:13px;font-weight:600;color:var(--mut)}
.dm-tabs button{position:relative;overflow:hidden;display:flex;flex-direction:column;gap:3px;min-width:180px}
.dm-tabs button b{font-size:15px}
.dm-tabs button.on .dm-sub{color:inherit}
.dm-pr{position:absolute;left:0;bottom:0;height:3px;width:100%;background:currentColor;opacity:.5;transform:scaleX(0);transform-origin:left}
.dm-tabs button.run .dm-pr{animation:pr 7s linear forwards}
@keyframes pr{to{transform:scaleX(1)}}
.dmw-side .dm-tabs button{min-width:0}
@media(max-width:900px){.dm-grid,.dmg-bento{grid-template-columns:1fr}.dm-grid .dm-cv{min-height:280px}}
/* ── экзамен (раскладка макета 4) ── */
.ex-tabs{position:relative}
.ex-tabs button{position:relative;z-index:1;transition:color .3s}
.ex-tabs button.on{background:none}
.ex-ind{position:absolute;left:4px;top:4px;bottom:4px;border-radius:99px;background:var(--ac);transition:transform .5s cubic-bezier(.2,.9,.2,1),width .5s cubic-bezier(.2,.9,.2,1)}
.ex-nums button{position:relative;opacity:0;transform:translateY(8px) scale(.96)}
.ex-nums.in button{animation:nin .5s cubic-bezier(.2,.8,.2,1) forwards;animation-delay:var(--d)}
@keyframes nin{to{opacity:1;transform:none}}
.ex-nums button.on{box-shadow:0 8px 20px -8px color-mix(in srgb,var(--ac) 70%,transparent)}
.ex-nums button[data-tip]:hover:after{content:attr(data-tip);position:absolute;left:50%;bottom:calc(100% + 8px);transform:translateX(-50%);width:max-content;max-width:200px;padding:7px 10px;border-radius:9px;background:var(--fg);color:var(--bg);font-size:12px;font-weight:600;line-height:1.3;z-index:5;pointer-events:none;white-space:normal;text-align:center}
.ex-st{display:inline-flex;align-items:center;gap:5px;padding:4px 10px;border-radius:99px;background:color-mix(in srgb,var(--ac) 14%,transparent);color:var(--ac)}
.ex-st b{color:var(--ac)}
.ex-f.ok input{box-shadow:inset 0 0 0 2px var(--ac)}
.ex-r.ok{animation:okp .5s cubic-bezier(.2,1.6,.4,1)}
@keyframes okp{0%{transform:scale(.8);opacity:0}100%{transform:none;opacity:1}}
.kbd-h{margin-left:auto;align-self:center;font-size:12px;color:var(--mut)}
.kbd-h kbd{font:inherit;font-weight:700;padding:2px 7px;border-radius:6px;box-shadow:inset 0 0 0 1px var(--line);background:var(--bg)}
@media(max-width:900px){.kbd-h{display:none}}
.ex-fig{box-shadow:0 0 0 1px var(--line)}
/* ── рулетка (макет 4): одинаковые карточки, плотнее, аккуратное свечение ── */
.lib .sh{margin-bottom:24px}
.lib-c{margin:0 0 4px}
.lib-k{display:none}
.ring-st{height:340px;perspective:2000px;margin-top:-6px}
.ring{width:264px;height:254px}
.ring-i{display:flex}
.ring-i .lc{width:100%;height:100%;display:flex;flex-direction:column;transition:box-shadow .45s,transform .45s cubic-bezier(.2,.8,.2,1)}
.ring-i .lc .cv{flex:none}
.ring-i .lc-t{flex:1;display:flex;flex-direction:column;justify-content:flex-start;min-height:0}
.ring-i .lc-t b{-webkit-line-clamp:2;min-height:2.5em}
.ring-i.on .lc{box-shadow:0 0 0 1.5px var(--ac),0 14px 34px -14px color-mix(in srgb,var(--ac) 55%,transparent),0 0 46px -18px color-mix(in srgb,var(--ac) 60%,transparent)}
.ring-i.pop .lc{transform:scale(1.04)}
.ring-ctl{margin-top:0}
.ring-cap.sw b,.ring-cap.sw span{animation:capin .45s cubic-bezier(.2,.8,.2,1)}
@keyframes capin{from{opacity:0;transform:translateY(6px)}}
.lib{padding-bottom:90px}
@media(max-width:600px){.ring-st{height:290px}.ring{width:208px;height:214px}}
/* ── доска: 3D-фигуры ── */
.brd-cv.t3d{cursor:copy}
.brd-sol{position:absolute;right:12px;top:12px;width:250px;padding:12px;border-radius:16px;background:color-mix(in srgb,var(--card) 92%,transparent);box-shadow:inset 0 0 0 1px var(--line),0 10px 30px -14px rgba(0,0,0,.25)}
.bs-k{display:flex;flex-wrap:wrap;gap:5px;margin-bottom:8px}
.bs-k button{padding:5px 10px;border-radius:99px;font-size:12px;font-weight:700;box-shadow:inset 0 0 0 1.3px var(--line);transition:background .2s,color .2s}
.bs-k button.on{background:var(--ac);color:var(--acf);box-shadow:none}
.bs-f{font-size:16px;min-height:26px}
.bs-d{font-size:12px;color:var(--mut);line-height:1.4;margin-top:4px}
.brd-fn{flex-wrap:wrap}
.brd-y{font-size:18px;padding-left:6px}
.brd-fn input{font-family:"Times New Roman",serif}
.brd-ex{display:flex;gap:6px}
.brd-ex button{padding:8px 11px;border-radius:10px;font-family:"Times New Roman",serif;font-style:italic;font-size:15px;box-shadow:inset 0 0 0 1.3px var(--line);white-space:nowrap}
.brd-ex button:hover{background:var(--ac);color:var(--acf);box-shadow:none}
.brd-cv{height:470px}
@media(max-width:900px){.brd-sol{left:10px;right:10px;top:auto;bottom:10px;width:auto}.brd-ex{display:none}.brd-cv,.brd-wide .brd-cv{height:420px}}
/* ── палитра: ручная подстройка ── */
.pal-c{display:grid;grid-template-columns:1fr;gap:6px;margin-bottom:14px}
.pal-c label{display:grid;grid-template-columns:34px 1fr auto;align-items:center;gap:10px;padding:5px 8px 5px 5px;border-radius:12px;box-shadow:inset 0 0 0 1px var(--line);cursor:pointer;font-size:13px;font-weight:600}
.pal-c input{width:34px;height:28px;border:0;padding:0;background:none;cursor:pointer;border-radius:8px}
.pal-c input::-webkit-color-swatch-wrapper{padding:0}
.pal-c input::-webkit-color-swatch{border:0;border-radius:8px;box-shadow:inset 0 0 0 1px rgba(0,0,0,.15)}
.pal-c code{font-size:11px;color:var(--mut);font-family:ui-monospace,monospace}
.pal-p{max-height:min(80vh,680px)}
/* ── UX ── */
.ux-prog{position:fixed;left:0;right:0;top:0;height:3px;z-index:60;pointer-events:none}
.ux-prog i{display:block;height:100%;background:var(--ac);transform-origin:left;transform:scaleX(0)}
.ux-dots{position:fixed;right:20px;top:50%;transform:translate(20px,-50%);z-index:55;display:flex;flex-direction:column;gap:12px;opacity:0;pointer-events:none;transition:opacity .4s,transform .5s cubic-bezier(.2,.8,.2,1)}
.ux-dots.show{opacity:1;transform:translate(0,-50%);pointer-events:auto}
.ux-dots a{display:flex;align-items:center;justify-content:flex-end;gap:10px;height:16px}
.ux-dots i{width:8px;height:8px;border-radius:50%;background:var(--mut);opacity:.5;transition:all .35s cubic-bezier(.2,.8,.2,1)}
.ux-dots a.on i{height:22px;border-radius:5px;background:var(--ac);opacity:1}
.ux-dots span{font-size:12px;font-weight:700;padding:4px 9px;border-radius:8px;background:var(--fg);color:var(--bg);opacity:0;transform:translateX(6px);transition:all .25s}
.ux-dots a:hover span{opacity:1;transform:none}
.ux-sticky{position:fixed;left:50%;bottom:18px;z-index:58;display:flex;align-items:center;gap:16px;padding:8px 8px 8px 20px;border-radius:99px;background:var(--fg);color:var(--bg);box-shadow:0 18px 40px -12px rgba(0,0,0,.35);transform:translate(-50%,140%);transition:transform .6s cubic-bezier(.2,.9,.2,1)}
.ux-sticky.on{transform:translate(-50%,0)}
.ux-sticky span{display:flex;flex-direction:column;line-height:1.2}
.ux-sticky b{font-size:14px}
.ux-sticky small{font-size:12px;opacity:.65}
.ux-sticky .btn{height:44px}
.ux-sticky .btn:after{background:var(--bg)}
.ux-sticky .btn:hover{color:var(--fg)}
.ux-toasts{position:fixed;left:20px;bottom:20px;z-index:70;display:flex;flex-direction:column;gap:8px;pointer-events:none;max-width:min(360px,calc(100vw - 110px))}
.ux-toast{padding:12px 16px;border-radius:14px;background:var(--card);color:var(--fg);box-shadow:inset 0 0 0 1px var(--line),0 16px 36px -14px rgba(0,0,0,.3);font-size:14px;font-weight:600;line-height:1.35;opacity:0;transform:translateY(14px) scale(.96);transition:all .45s cubic-bezier(.2,.9,.2,1);border-left:4px solid var(--ac)}
.ux-toast.on{opacity:1;transform:none}
.ux-cf{position:fixed;inset:0;width:100vw;height:100vh;z-index:75;pointer-events:none}
.ux-count{display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 12px;border-radius:99px;font-size:13px;font-weight:700;color:var(--mut);box-shadow:inset 0 0 0 1.5px var(--line);margin-left:auto;transition:color .3s,background .3s}
.n-bar .ux-count,.n-pill .ux-count{margin-left:0}
.n-min .ux-count{margin-left:auto}
.n-min .ux-count + .nav-cta{margin-left:0}
.ux-count.has{color:var(--ac);background:color-mix(in srgb,var(--ac) 12%,transparent);box-shadow:none}
.ux-count.bump{animation:bump .5s cubic-bezier(.2,1.8,.4,1)}
@keyframes bump{40%{transform:scale(1.18)}}
@media(max-width:900px){.ux-count span{display:none}.ux-count{margin-left:auto}}
.ux-spot{position:relative}
.ux-spot:before{content:"";position:absolute;inset:0;border-radius:inherit;background:radial-gradient(420px circle at var(--mx,50%) var(--my,50%),color-mix(in srgb,var(--ac) 10%,transparent),transparent 60%);opacity:0;transition:opacity .3s;pointer-events:none;z-index:1}
.ux-spot:hover:before{opacity:1}
.uxo-tilt .dm-card,.uxo-tilt .prc-c{transform-style:preserve-3d;will-change:transform;transition:transform .25s ease-out}
@media(max-width:700px){.ux-dots{display:none}.ux-sticky{bottom:12px;left:12px;right:84px;transform:translateY(160%)}.ux-sticky.on{transform:none}.ux-sticky small{display:none}.ux-toasts{left:12px;bottom:80px}}

.hm-word.ol .hw-b .ch{color:var(--fg);-webkit-text-stroke:0}
.hm-word.ol .hw-b .ac .ch,.hm-word.ol .hw-b .dot{color:var(--ac)}
.hero.mega.ready .ch,.hero.mega.ready .dot,.hero.mega.ready .hm-sub{transition:none}
/* ═══════════ небо и облака (21–30) ═══════════ */
.hero.sky{display:block;min-height:0;padding:0;overflow:visible}
.skh{height:240vh;position:relative}
.sk-st{position:sticky;top:0;height:100vh;overflow:hidden;background:linear-gradient(var(--sk1,#6fb1ff),var(--sk2,#d4e9ff) 78%,var(--bg))}
.sk-bg,.sk-fg{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.sk-bg{z-index:0}.sk-fg{z-index:2}
.sk-wc{position:absolute;inset:0;z-index:1;display:flex;flex-direction:column;align-items:center;justify-content:center;pointer-events:none}
.sk-word{display:flex;align-items:center;justify-content:center;white-space:nowrap;line-height:.84;font-size:clamp(60px,16.5vw,280px);color:var(--fg);will-change:transform,opacity}
.sk-stack .sk-word{flex-direction:column;font-size:clamp(96px,23vw,350px)}
.sk-word .g{display:inline-flex}
.sk-word .ch{display:inline-block;font-style:normal}
.sk-word .ch b{display:inline-block;font-weight:inherit;opacity:0;transform:translateY(45%) scale(.9);filter:blur(10px);transition:opacity 1s cubic-bezier(.2,.8,.2,1),transform 1.3s cubic-bezier(.2,.8,.2,1),filter 1s;transition-delay:calc(var(--i) * 70ms)}
.hero.sky.in .sk-word .ch b{opacity:1;transform:none;filter:none}
.hero.sky.ready .sk-word .ch b{transition:none;animation:float 6s ease-in-out infinite;animation-delay:calc(var(--i) * -.55s)}
@keyframes float{50%{transform:translateY(-.035em)}}
.sk-word .dot{margin:0 .03em}
.sk-sub{position:relative;margin-top:clamp(18px,2.4vw,34px);font-family:var(--fb);font-weight:700;font-size:clamp(15px,1.6vw,22px);color:var(--fg);opacity:0;padding:9px 18px;border-radius:99px;background:color-mix(in srgb,var(--skc,#fff) 55%,transparent);box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--fg) 10%,transparent)}
.hero.sky.in .sk-sub{transition:opacity 1s .8s}
.sk-in{position:absolute;inset:0;z-index:3;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:0 24px;opacity:0;pointer-events:none}
.sk-in .h-h{max-width:1000px;text-shadow:0 2px 30px color-mix(in srgb,var(--skc,#fff) 70%,transparent)}
.sk-in .h-p{margin-left:auto;margin-right:auto;color:var(--fg);opacity:.78}
.sk-in .btn.gh{background:color-mix(in srgb,var(--skc,#fff) 55%,transparent)}
.sk-fade{position:absolute;left:0;right:0;bottom:0;height:16vh;z-index:4;background:linear-gradient(transparent,var(--bg));pointer-events:none}
.hero.sky .hm-sc{z-index:5;color:var(--fg)}
.sk-window .sk-st{background:var(--bg)}
.sk-window .sk-fg{z-index:1}
.sk-storm .sk-word{transition:color .08s,text-shadow .08s}
.hero.sky.flash .sk-word{color:#fff;text-shadow:0 0 40px rgba(180,215,255,.9)}
.sk-night .sk-word .ac,.sk-night .sk-word .dot{text-shadow:0 0 34px color-mix(in srgb,var(--ac) 60%,transparent)}
.sk-pastel .sk-word{color:var(--ac)}
.sk-pastel .sk-word .g2 .ch,.sk-pastel .sk-word .dot{color:var(--ac2)}
.sk-sunrise .sk-word .ch b{font-style:italic}
@media(max-width:700px){.skh{height:200vh}}
/* финал с облаками */
.fin-s{position:relative;padding:150px 0 170px;overflow:hidden;background:linear-gradient(var(--bg),var(--sk2,#d4e9ff) 30%,var(--sk1,#6fb1ff));text-align:center}
.fin-s canvas{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.fs-in{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;gap:18px}
.fs-in h2{font-size:clamp(40px,7vw,108px);line-height:.98}
.fs-in p{font-size:19px;color:var(--fg);opacity:.8}
/* облачка у заголовков */
.sec{position:relative}
.sec-cl{position:absolute;width:clamp(150px,18vw,260px);height:auto;pointer-events:none;opacity:.75;z-index:0;animation:cld 22s ease-in-out infinite alternate}
.sec-cl.c0{right:4%;top:40px}.sec-cl.c1{left:3%;top:70px;animation-duration:27s;width:clamp(120px,14vw,200px)}.sec-cl.c2{right:12%;top:20px;animation-duration:31s}
@keyframes cld{to{transform:translateX(-60px)}}
html[data-theme=dark] .sec-cl{opacity:.22}
.sec .wrap{position:relative;z-index:1}
.sk-parting .sk-st:after{content:"";position:absolute;inset:0;z-index:2;background:var(--skc,#fff);opacity:var(--fog,0);pointer-events:none}

/* ═══════════ ФИНАЛЬНЫЙ ЛЕНДИНГ (landing) ═══════════ */
/* шапка как в шаблоне 1: «таблетка» по центру */
.nav.n-pill{top:12px;padding:0 14px}
.n-pill .nav-in{max-width:1080px;gap:18px;padding:8px 8px 8px 20px}
.n-pill.solid .nav-in{box-shadow:inset 0 0 0 1px var(--line),0 14px 34px rgba(0,0,0,.16)}
.nav-l{gap:20px}
.nav-in-b{height:44px;padding:0 18px;font-size:14px;margin-left:4px}
.sty-b{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;flex-shrink:0;color:var(--ac);background:color-mix(in srgb,var(--ac) 12%,transparent);transition:transform .35s cubic-bezier(.2,1.6,.4,1),background .25s}
.sty-b:hover{transform:translateY(-2px) rotate(-8deg);background:color-mix(in srgb,var(--ac) 22%,transparent)}
.sty-b svg{animation:cl 4s ease-in-out infinite}@keyframes cl{50%{transform:translateX(2px)}}
.mm-b{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}.mm-b .btn{margin-top:0;font-family:var(--fb);font-size:16px}
@media(max-width:1100px){.nav-l{gap:14px;font-size:14px}}
@media(max-width:1000px){.nav-l{display:none}.nav-in-b{margin-left:auto}}
@media(max-width:900px){.nav-in-b,.nav-cta{display:none}.sty-b{margin-left:auto}.burger{margin-left:6px}.n-pill .nav-in{padding:6px 6px 6px 16px}}
/* переход между стилями */
.sty-cover{position:fixed;inset:0;z-index:200;pointer-events:none;display:grid;place-items:center;opacity:0;transition:opacity .45s}
.sty-cover.on{opacity:1;pointer-events:auto}
.sty-cover.sky{background:linear-gradient(#6fb1ff,#d4e9ff)}.sty-cover.paper{background:#f6f1e7}
.sty-cover b{font-family:var(--fd);font-size:clamp(22px,3vw,40px);color:#0c2547;position:relative;z-index:2}
.sty-cover.paper b{color:#1d1a16}
.sty-cover i{position:absolute;width:40vmax;height:14vmax;border-radius:99px;background:#fff;opacity:.85;filter:blur(8px);animation:cvf 1s ease-out forwards}
.sty-cover.paper i{background:#ece4d4}
.sty-cover i:nth-child(1){left:-10%;top:20%}.sty-cover i:nth-child(2){right:-12%;top:50%;animation-delay:.1s}.sty-cover i:nth-child(3){left:20%;bottom:-4%;animation-delay:.2s}
@keyframes cvf{from{transform:translateX(-30%) scale(.8)}to{transform:none}}

/* стрелка «листай» */
.hm-sc{z-index:6;cursor:pointer;color:var(--mut)}
.hm-sc .hm-ar{width:46px;height:46px;border-radius:50%;display:grid;place-items:center;background:var(--card);color:var(--fg);box-shadow:inset 0 0 0 1.5px var(--line),0 10px 24px -12px rgba(0,0,0,.35);animation:arb 2s cubic-bezier(.5,0,.5,1) infinite;transition:background .25s,color .25s}
.hm-sc:hover .hm-ar{background:var(--ac);color:var(--acf)}
.hm-sc .hm-ar svg{display:block}
@keyframes arb{0%,100%{transform:translateY(0)}50%{transform:translateY(7px)}}

/* кнопки: без тряски; текст поверх заливки при наведении */
.btn{transform:none!important;transition:color .3s,box-shadow .3s,background .3s}
.btn>span,.btn>svg{position:relative;z-index:1}
.btn.gh:after{background:var(--fg)}
.btn.gh:hover{color:var(--bg);box-shadow:inset 0 0 0 2px var(--fg)}
.h-btns .btn{min-width:220px}

/* центровка заголовков секций и цифр */
.sh,.sh.h-c{text-align:center;margin-left:auto;margin-right:auto;display:flex;flex-direction:column;align-items:center}
.sh p{margin-left:auto;margin-right:auto}
.sk{justify-content:center}
.sk:after{content:"";width:26px;height:2px;background:currentColor}
.stl{text-align:center}
.stl>div{padding:28px 10px 0}
.lib-c{justify-content:center;text-align:center}
.les-more{text-align:center}
@media(max-width:700px){.stl>div{padding:22px 6px 0}}

/* ── тренажёр: рамка вокруг задания, растёт при решении ── */
.ex-pane{min-width:0;padding:18px}
.ex-frame{position:relative;border-radius:20px;box-shadow:inset 0 0 0 1.5px var(--line);transition:height .6s cubic-bezier(.2,.9,.2,1),box-shadow .4s;overflow:hidden}
.ex-frame:before{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;box-shadow:inset 0 0 0 2px var(--ac);opacity:0;transition:opacity .4s}
.ex-frame.sol-on{box-shadow:inset 0 0 0 1.5px transparent,0 24px 60px -30px color-mix(in srgb,var(--ac) 60%,transparent)}
.ex-frame.sol-on:before{opacity:1}
.ex-frame .ex-task{padding:24px}
@media(max-width:900px){.ex-pane{padding:12px}.ex-frame .ex-task{padding:16px}}
.ex-act .btn.on{background:var(--ac);color:var(--acf);box-shadow:none}
.ex-sol{margin-top:6px}
.sv-h{display:flex;justify-content:space-between;align-items:center;margin-top:18px;gap:10px}
.sv-h b{display:flex;align-items:center;gap:8px;font-size:16px}.sv-h b svg{color:var(--ac)}
.sv-c{font-size:13px;color:var(--mut);font-weight:700}.sv-c i{font-style:normal;color:var(--ac)}
.sv-bar{height:4px;border-radius:4px;background:var(--line);margin:10px 0 14px;overflow:hidden}.sv-bar i{display:block;height:100%;background:var(--ac);transform-origin:left;transform:scaleX(0);transition:transform .5s cubic-bezier(.2,.9,.2,1)}
.sv-l{list-style:none;display:flex;flex-direction:column;gap:8px;position:relative}
.sv-s{display:none;grid-template-columns:30px 1fr;gap:12px;padding:12px 14px;border-radius:14px;background:color-mix(in srgb,var(--fg) 4%,transparent);font-size:15px;line-height:1.55;overflow-x:auto;position:relative;transition:background .35s,box-shadow .35s;cursor:default}
.sv-s.on{display:grid}
.sv-s.sv-now{background:color-mix(in srgb,var(--ac) 11%,transparent);box-shadow:inset 3px 0 0 var(--ac)}
.sv-n{width:28px;height:28px;border-radius:50%;display:grid;place-items:center;font-size:12px;font-weight:800;background:color-mix(in srgb,var(--fg) 10%,transparent);transition:background .3s,color .3s}
.sv-s.sv-now .sv-n,.sv-s.on .sv-n{background:var(--ac);color:var(--acf)}
.sv-s:not(.sv-now) .sv-t{opacity:.82}
.sv-a{display:none;align-items:center;gap:14px;margin-top:12px;padding:14px 18px;border-radius:14px}
.sv-a.on{display:flex}.sv-a>span{font-size:12px;letter-spacing:.12em;text-transform:uppercase;opacity:.75}.sv-a b{font-size:20px}
.sv-ctl{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.ex-fig{background:#fff}

/* ── физика ── */
.dm[data-k=throw] .dm-cv{background:#1d2b64}
.dm[data-k=throw] .dm-hint{background:#fff;color:#1d2b64}

/* ── доска ── */
.brd-g{grid-template-columns:minmax(0,1.55fr) minmax(300px,1fr);gap:18px;align-items:stretch}
.brd-app{display:flex;flex-direction:column}
.brd-bar{gap:2px}
.bt-sep{width:1px;align-self:stretch;margin:4px 4px;background:var(--line)}
.bt.sc:not(.on){color:var(--ac);box-shadow:inset 0 0 0 1.5px color-mix(in srgb,var(--ac) 45%,transparent)}
.brd-cv{flex:1;height:auto;min-height:520px}
.brd-flash{position:absolute;inset:0;background:#fff;opacity:0;pointer-events:none}.brd-flash.on{animation:flash .6s ease-out}
@keyframes flash{0%{opacity:.85}100%{opacity:0}}
.brd-toast{position:absolute;left:50%;top:14px;transform:translate(-50%,-12px);padding:9px 16px;border-radius:99px;background:var(--fg);color:var(--bg);font-size:13px;font-weight:700;opacity:0;pointer-events:none;white-space:nowrap;max-width:92%;overflow:hidden;text-overflow:ellipsis}
.brd-toast.on{animation:bt 3s cubic-bezier(.2,.9,.2,1)}
@keyframes bt{0%{opacity:0;transform:translate(-50%,-12px)}10%,85%{opacity:1;transform:translate(-50%,0)}100%{opacity:0;transform:translate(-50%,0)}}
.bp{border-radius:var(--r);background:var(--card);box-shadow:inset 0 0 0 1px var(--line);padding:14px;display:flex;flex-direction:column;min-width:0}
.bp-tabs{display:grid;grid-template-columns:repeat(3,1fr);gap:4px;padding:4px;border-radius:14px;background:color-mix(in srgb,var(--fg) 6%,transparent);margin-bottom:14px}
.bp-tabs button{display:flex;align-items:center;justify-content:center;gap:6px;padding:9px 6px;border-radius:10px;font-weight:700;font-size:13px;transition:background .25s,color .25s}
.bp-tabs button.on{background:var(--ac);color:var(--acf)}
.bp-pane{display:none;flex-direction:column;gap:12px}.bp-pane.on{display:flex}
.bf-k{display:flex;gap:6px;flex-wrap:wrap}
.bf-k button{padding:8px 13px;border-radius:99px;font-size:13px;font-weight:700;box-shadow:inset 0 0 0 1.4px var(--line);transition:background .2s,color .2s}
.bf-k button.on{background:var(--fg);color:var(--bg);box-shadow:none}
.bf-d{font-size:13px;color:var(--mut);line-height:1.45}
.bf-p{display:flex;flex-direction:column;gap:8px}
.bf-p label{display:grid;grid-template-columns:24px 1fr 30px;gap:10px;align-items:center}
.bf-p output{font-weight:800;text-align:right}
.bf-f{display:flex;flex-direction:column;gap:7px}
.bf-r{padding:10px 12px;border-radius:14px;box-shadow:inset 0 0 0 1.3px var(--line);cursor:pointer;transition:background .25s,box-shadow .25s,transform .25s}
.bf-r small{display:block;font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--mut);margin-bottom:2px}
.bf-g{font-size:17px}.bf-v{font-size:15px;color:var(--mut);overflow-x:auto;overflow-y:hidden}
.bf-r.on{background:color-mix(in srgb,var(--ac) 12%,transparent);box-shadow:inset 0 0 0 1.6px var(--ac);transform:translateX(4px)}
.bf-r.on .bf-v{color:var(--fg)}
.bp-note{display:flex;gap:7px;align-items:flex-start;font-size:12px;color:var(--mut);line-height:1.4}.bp-note svg{flex-shrink:0;margin-top:1px}
.bg-in{display:flex;gap:8px;align-items:center}
.bg-y{font-size:18px}
.bg-in input{flex:1;min-width:0;height:44px;border-radius:12px;border:0;background:color-mix(in srgb,var(--fg) 6%,transparent);padding:0 12px;font-family:var(--fb);font-weight:700;font-size:17px;outline:none}
.bg-in input:focus{box-shadow:inset 0 0 0 2px var(--ac)}.bg-in input.bad{box-shadow:inset 0 0 0 2px #e5484d}
.bg-ex{display:flex;flex-wrap:wrap;gap:6px}
.bg-ex button{padding:7px 11px;border-radius:10px;font-size:13px;font-weight:700;box-shadow:inset 0 0 0 1.3px var(--line)}
.bg-ex button:hover{background:var(--ac);color:var(--acf);box-shadow:none}
.bg-st{list-style:none;counter-reset:g;display:flex;flex-direction:column;gap:4px}
.bg-st li{counter-increment:g;display:grid;grid-template-columns:26px 1fr;column-gap:10px;padding:8px 10px;border-radius:12px;opacity:.5;transition:opacity .3s,background .3s}
.bg-st li:before{content:counter(g);grid-row:span 2;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;font-size:12px;font-weight:800;background:color-mix(in srgb,var(--fg) 10%,transparent)}
.bg-st li b{font-size:14px}.bg-st li span{font-size:12px;color:var(--mut)}
.bg-st li.on{opacity:1}.bg-st li.on:before{background:var(--fg);color:var(--bg);content:"✓"}
.bg-st li.st-now{opacity:1;background:color-mix(in srgb,var(--ac) 12%,transparent)}.bg-st li.st-now:before{background:var(--ac);color:var(--acf)}
.bg-tb .bg-f{font-size:17px;margin-bottom:6px}
.bg-tb table{width:100%;border-collapse:separate;border-spacing:3px;font-size:13px;font-weight:700;font-variant-numeric:tabular-nums}
.bg-tb th{color:var(--mut);font-style:italic;font-family:"Times New Roman",serif;font-size:15px;width:22px}
.bg-tb td{text-align:center;padding:6px 2px;border-radius:8px;background:color-mix(in srgb,var(--fg) 5%,transparent);transition:background .2s,color .2s}
.bg-tb.in td{animation:tdin .4s cubic-bezier(.2,.9,.2,1) backwards;animation-delay:calc(var(--i) * 90ms)}.bg-tb.fast td{animation:none}
@keyframes tdin{from{opacity:0;transform:translateY(6px)}}
.bg-tb td.hot{background:var(--ac);color:var(--acf)}
.bg-sp{display:flex;flex-wrap:wrap;gap:6px}.bg-sp span{padding:6px 10px;border-radius:99px;font-size:12px;font-weight:700;background:color-mix(in srgb,var(--ac2) 16%,transparent);animation:tdin .4s backwards}
.bg-re,.ba-re{align-self:flex-start}
.ba-ph{position:relative;padding:14px;border-radius:14px;background:#fff;color:#222;box-shadow:0 10px 30px -16px rgba(0,0,0,.4);transform:rotate(-1.2deg);overflow:hidden;font-family:Georgia,serif;font-size:14px;line-height:1.5}
.ba-tag{display:inline-flex;align-items:center;gap:6px;font-family:var(--fb);font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:#777;margin-bottom:6px}
.ba-scan{position:absolute;left:0;right:0;top:0;height:30%;background:linear-gradient(transparent,color-mix(in srgb,var(--ac) 45%,transparent),transparent);opacity:0;pointer-events:none}
.ba-ph.scan .ba-scan{opacity:1;animation:scan 1s linear infinite}@keyframes scan{from{transform:translateY(-100%)}to{transform:translateY(340%)}}
.ba-r{display:flex;flex-direction:column;gap:6px}
.ba-b{padding:10px 12px;border-radius:12px;box-shadow:inset 0 0 0 1.3px var(--line);opacity:0;transform:translateY(8px);transition:opacity .45s,transform .45s cubic-bezier(.2,.9,.2,1);overflow-x:auto}
.ba-b.on{opacity:1;transform:none}
.ba-b b{display:block;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ac);margin-bottom:2px}
.ba-ans{background:var(--ac);color:var(--acf);box-shadow:none}.ba-ans b{color:inherit;opacity:.8}
.brd-fe{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:18px}
.bfe{text-align:left;display:flex;flex-direction:column;gap:8px;padding:20px;border-radius:var(--r);background:var(--card);box-shadow:inset 0 0 0 1px var(--line);transition:transform .35s cubic-bezier(.2,.9,.2,1),box-shadow .3s}
.bfe:hover{transform:translateY(-4px);box-shadow:inset 0 0 0 1.6px var(--ac),0 20px 40px -24px color-mix(in srgb,var(--ac) 60%,transparent)}
.bfe>i{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:color-mix(in srgb,var(--ac) 14%,transparent);color:var(--ac)}
.bfe b{font-family:var(--fd);font-weight:700;font-size:17px;letter-spacing:-.01em;line-height:1.2}
.bfe span{font-size:14px;color:var(--mut);line-height:1.5}
.bfe em{margin-top:auto;font-style:normal;font-weight:700;font-size:14px;color:var(--ac);display:inline-flex;gap:6px;align-items:center}
@media(max-width:1000px){.brd-g{grid-template-columns:1fr}.brd-cv{min-height:400px}.brd-fe{grid-template-columns:1fr}}
@media(max-width:600px){.bt span{display:none}.bt{padding:9px}.brd-cv{min-height:360px}}

/* ── тарифы: галочки и крестики ── */
.prc-g{align-items:stretch}
.prc-c{position:relative;overflow:hidden}
.prc-c.top{box-shadow:inset 0 0 0 2px var(--ac2),0 30px 60px -36px color-mix(in srgb,var(--ac2) 70%,transparent)}
.prc-tag{position:absolute;right:18px;top:18px;padding:5px 11px;border-radius:99px;font-size:11px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;background:var(--acf);color:var(--ac)}
.prc-tag.all{background:var(--ac2);color:#fff}
.prc-s{display:block;font-size:14px;opacity:.7;margin-top:2px}
.prc-m{display:flex;flex-direction:column;gap:6px;margin:-6px 0 16px;font-size:13px}
.prc-m i{display:block;height:6px;border-radius:6px;background:color-mix(in currentColor 15%,transparent);background:rgba(127,127,127,.2);position:relative;overflow:hidden}
.prc-m i:after{content:"";position:absolute;inset:0;background:currentColor;transform-origin:left;transform:scaleX(var(--k));opacity:.8;transition:transform 1.2s cubic-bezier(.2,.9,.2,1)}
.prc-c li{align-items:flex-start;transition:opacity .3s}
.prc-c li em{width:22px;height:22px;border-radius:50%;display:grid;place-items:center;flex-shrink:0;margin-top:0}
.prc-c li.y em{background:color-mix(in srgb,var(--ac) 16%,transparent);color:var(--ac)}
.prc-c li.n{opacity:.5}.prc-c li.n em{background:rgba(229,72,77,.14);color:#e5484d}.prc-c li.n{text-decoration:line-through;text-decoration-color:rgba(127,127,127,.5)}
.prc-c.hot li.y em{background:var(--acf);color:var(--ac)}.prc-c.hot li.n em{background:rgba(255,255,255,.2);color:var(--acf)}
.prc-c.top li.y em{background:color-mix(in srgb,var(--ac2) 18%,transparent);color:var(--ac2)}
.prc-c li svg{margin:0;color:inherit!important}
.prc-c.rv li{animation:none}
.prc-c.in li{animation:pli .5s cubic-bezier(.2,.9,.2,1) backwards;animation-delay:calc(var(--j) * 120ms + var(--i) * 45ms)}
@keyframes pli{from{opacity:0;transform:translateX(-10px)}}
.prc-c.in li.y em{animation:pop .5s cubic-bezier(.2,1.8,.4,1) backwards;animation-delay:calc(var(--j) * 120ms + var(--i) * 45ms + .15s)}
@keyframes pop{from{transform:scale(0)}}

/* ── тур «Что вас ждёт» ── */
.tour{overflow:hidden}
.tr{display:grid;grid-template-columns:300px minmax(0,1fr);gap:22px;align-items:start}
.tr-ch{display:flex;flex-direction:column;gap:6px}
.tr-c{position:relative;display:flex;gap:12px;align-items:center;text-align:left;padding:12px 14px;border-radius:16px;overflow:hidden;transition:background .3s,color .3s}
.tr-c:hover{background:color-mix(in srgb,var(--fg) 5%,transparent)}
.tr-c>i{width:40px;height:40px;border-radius:12px;flex-shrink:0;display:grid;place-items:center;background:color-mix(in srgb,var(--fg) 7%,transparent);transition:background .3s,color .3s}
.tr-c b{display:block;font-size:15px}.tr-c small{display:block;font-size:12px;color:var(--mut);line-height:1.3}
.tr-c.on{background:var(--card);box-shadow:inset 0 0 0 1.5px var(--line),0 14px 30px -20px rgba(0,0,0,.4)}
.tr-c.on>i{background:var(--ac);color:var(--acf)}
.tr-pb{position:absolute;left:14px;right:14px;bottom:5px;height:3px;border-radius:3px;overflow:hidden;opacity:0}
.tr-c.on .tr-pb{opacity:1;background:var(--line)}
.tr-pb u{display:block;height:100%;background:var(--ac);transform-origin:left;transform:scaleX(0)}
.tr-c.done>i{color:var(--ac)}
.tr-v{min-width:0}
.tr-win{border-radius:20px;overflow:hidden;background:#0b1220;box-shadow:0 0 0 1px var(--line),0 40px 90px -40px rgba(0,0,0,.55)}
.tr-bar{display:flex;align-items:center;gap:7px;padding:10px 14px;background:#141b2b}
.tr-bar>i{width:11px;height:11px;border-radius:50%;background:#ff5f57}.tr-bar>i:nth-child(2){background:#febc2e}.tr-bar>i:nth-child(3){background:#28c840}
.tr-url{flex:1;margin:0 10px;padding:5px 12px;border-radius:8px;background:#0b1220;color:#9aa4b8;font-size:12px;font-family:ui-monospace,monospace}.tr-url b{color:#e6edf7;font-weight:600}
.tr-pp{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;color:#fff;background:rgba(255,255,255,.1)}
.tr-scr{position:relative;aspect-ratio:1200/750;overflow:hidden;cursor:pointer}
.tr-s{position:absolute;inset:0;opacity:0;transform:scale(1.04);transition:opacity .7s,transform 1.2s cubic-bezier(.2,.9,.2,1)}
.tr-s.on{opacity:1;transform:none}
.tr-s img{width:100%;height:100%;object-fit:cover;object-position:top left}
.tr-s.on img{animation:kb 8s ease-out forwards}@keyframes kb{to{transform:scale(1.05)}}
.tr-live{position:absolute;inset:0;width:100%;height:100%;background:rgba(6,10,22,.55);backdrop-filter:blur(2px)}
.tr-cur{position:absolute;left:50%;top:60%;z-index:3;transition:left 1.25s cubic-bezier(.6,0,.2,1),top 1.25s cubic-bezier(.6,0,.2,1);filter:drop-shadow(0 4px 8px rgba(0,0,0,.4));pointer-events:none}
.tr-rip{position:absolute;left:-14px;top:-14px;width:32px;height:32px;border-radius:50%;border:2px solid #fff;opacity:0}
.tr-cur.clk .tr-rip{animation:rip .6s ease-out}.tr-cur.clk svg{animation:prs .3s}
@keyframes rip{from{opacity:1;transform:scale(.3)}to{opacity:0;transform:scale(1.8)}}@keyframes prs{50%{transform:scale(.85)}}
.tr-tip{position:absolute;z-index:4;padding:8px 13px;border-radius:12px;background:var(--ac);color:var(--acf);font-weight:800;font-size:13px;white-space:nowrap;opacity:0;transform:translateY(8px) scale(.95);pointer-events:none;box-shadow:0 12px 26px -10px rgba(0,0,0,.45)}
.tr-tip.on{animation:tip 2s cubic-bezier(.2,.9,.2,1) forwards}
@keyframes tip{0%{opacity:0;transform:translateY(8px) scale(.95)}15%,80%{opacity:1;transform:none}100%{opacity:0;transform:none}}
.tr-flash{position:absolute;inset:0;background:#fff;opacity:0;z-index:5;pointer-events:none}.tr-flash.on{animation:flash .7s ease-out}
.tr-shot{position:absolute;right:4%;bottom:6%;z-index:6;width:30%;padding:8px;border-radius:14px;background:#fff;box-shadow:0 20px 50px -14px rgba(0,0,0,.6);transform:translateY(30px) rotate(4deg) scale(.6);opacity:0;transition:all .7s cubic-bezier(.2,1.4,.4,1)}
.tr-shot.on{opacity:1;transform:rotate(-3deg)}
.tr-shot img{border-radius:8px}.tr-shot span{display:flex;align-items:center;gap:6px;margin-top:6px;font-size:12px;font-weight:800;color:#167a4b}
.tr-prog{height:3px;background:#141b2b}.tr-prog i{display:block;height:100%;background:var(--ac);transform-origin:left;transform:scaleX(0)}
.tr-cap{display:grid;grid-template-columns:auto 1fr auto;gap:6px 18px;align-items:center;margin-top:18px}
.tr-n{grid-row:span 2;font-family:var(--fd);font-weight:800;font-size:15px;color:var(--ac);padding:10px 12px;border-radius:12px;background:color-mix(in srgb,var(--ac) 12%,transparent)}
.tr-cap h3{font-size:clamp(20px,2.2vw,28px)}.tr-cap p{grid-column:2;color:var(--mut);font-size:15px;max-width:640px}
.tr-cap .btn{grid-row:1 / span 2;grid-column:3}
@media(max-width:1000px){.tr{grid-template-columns:1fr}.tr-ch{flex-direction:row;overflow-x:auto;scrollbar-width:none;padding-bottom:4px}.tr-ch::-webkit-scrollbar{display:none}.tr-c{flex-shrink:0}.tr-c small{display:none}.tr-cap{grid-template-columns:auto 1fr}.tr-cap .btn{grid-column:1 / -1;grid-row:auto;justify-self:start}}

/* ── финал «Готов к экзамену? Начни сегодня.» ── */
.fin-r .fc-in{display:flex;flex-direction:column;align-items:center}
.fin-r .fc-in h2{display:flex;flex-direction:column;align-items:center;font-size:clamp(44px,8.4vw,128px);line-height:.98;margin-bottom:36px}
.fin-r .fc-l{display:block}.fin-r .fc-l:last-child{color:var(--acf);opacity:.9;-webkit-text-stroke:0}
.fin-r .fc-l:first-child{color:var(--acf)}
.fc-k{display:inline-flex;gap:8px;align-items:center;margin-bottom:22px;padding:8px 16px;border-radius:99px;background:color-mix(in srgb,var(--acf) 16%,transparent);font-weight:700;font-size:15px}
.fc-btns{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}
.fin-r .fc-btns .btn{background:var(--acf);color:var(--ac);min-width:220px}
.fin-r .fc-btns .btn:after{background:var(--fg)}.fin-r .fc-btns .btn:hover{color:var(--bg)}
.fin-r .fc-btns .btn.gh{background:transparent;color:var(--acf);box-shadow:inset 0 0 0 2px color-mix(in srgb,var(--acf) 50%,transparent)}
.fin-r .fc-btns .btn.gh:after{background:var(--acf)}.fin-r .fc-btns .btn.gh:hover{color:var(--ac)}
.fc-ring{position:absolute;left:50%;top:50%;width:60vmin;height:60vmin;margin:-30vmin 0 0 -30vmin;border-radius:50%;border:2px solid var(--acf);pointer-events:none}

/* ── вход / регистрация ── */
html.au-lock{overflow:hidden}
.au{position:fixed;inset:0;z-index:150;display:grid;place-items:center;padding:16px;pointer-events:none;visibility:hidden}
.au.on{pointer-events:auto;visibility:visible}
.au-bg{position:absolute;inset:0;background:rgba(10,8,6,.5);backdrop-filter:blur(8px);opacity:0;transition:opacity .35s}
.au.on .au-bg{opacity:1}
.au-box{position:relative;width:min(900px,100%);max-height:calc(100vh - 32px);overflow:auto;display:grid;grid-template-columns:.9fr 1.1fr;border-radius:28px;background:var(--card);color:var(--fg);box-shadow:0 40px 100px -30px rgba(0,0,0,.55),inset 0 0 0 1px var(--line);opacity:0;transform:translateY(30px) scale(.96);transition:opacity .35s,transform .5s cubic-bezier(.2,1.2,.3,1)}
.au.on .au-box{opacity:1;transform:none}
.au-x{position:absolute;right:14px;top:14px;z-index:3;width:40px;height:40px;border-radius:50%;display:grid;place-items:center;box-shadow:inset 0 0 0 1.5px var(--line);transition:transform .3s,background .2s}
.au-x:hover{transform:rotate(90deg);background:color-mix(in srgb,var(--fg) 6%,transparent)}
.au-side{position:relative;overflow:hidden;padding:34px 30px;background:var(--ac);color:var(--acf);display:flex;flex-direction:column;gap:20px}
.au-side .logo i{background:var(--acf);color:var(--ac)}
.au-side h3{font-size:clamp(26px,3vw,36px);line-height:1.05;position:relative;z-index:1}
.au-side ul{list-style:none;display:flex;flex-direction:column;gap:10px;position:relative;z-index:1;font-weight:600}
.au-side li{display:flex;gap:10px;align-items:center}.au-side li svg{flex-shrink:0;padding:3px;border-radius:50%;background:color-mix(in srgb,var(--acf) 20%,transparent);width:22px;height:22px}
.au-orb{position:absolute;border-radius:50%;background:color-mix(in srgb,var(--acf) 14%,transparent);animation:orb 9s ease-in-out infinite}
.au-orb.o1{width:220px;height:220px;right:-70px;bottom:-60px}.au-orb.o2{width:110px;height:110px;right:60px;bottom:120px;animation-delay:-3s}.au-orb.o3{width:60px;height:60px;left:30px;bottom:40px;animation-delay:-6s}
@keyframes orb{50%{transform:translate(-14px,-18px) scale(1.06)}}
.au-main{padding:30px 30px 26px;display:flex;flex-direction:column;min-width:0}
.au-tabs{position:relative;display:grid;grid-template-columns:1fr 1fr;padding:4px;border-radius:99px;background:color-mix(in srgb,var(--fg) 7%,transparent);margin:0 44px 22px 0}
.au-tabs button{position:relative;z-index:1;padding:11px;border-radius:99px;font-weight:800;font-size:14px;transition:color .3s}
.au-tabs button.on{color:var(--acf)}
.au-ind{position:absolute;left:4px;top:4px;bottom:4px;border-radius:99px;background:var(--ac);transition:transform .45s cubic-bezier(.2,.9,.2,1),width .45s}
.au-p{display:none;flex-direction:column;gap:12px}.au-p.on{display:flex;animation:aup .45s cubic-bezier(.2,.9,.2,1)}
@keyframes aup{from{opacity:0;transform:translateX(14px)}}
.au-p h4{font-family:var(--fd);font-weight:800;font-size:24px;letter-spacing:-.02em}
.au-s{color:var(--mut);font-size:14px;margin-top:-8px}
.au-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.au-f{position:relative;display:flex;flex-direction:column;gap:5px;min-width:0}
.au-f span{font-size:12px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--mut)}
.au-f input,.au-f select{height:50px;border-radius:14px;border:0;background:color-mix(in srgb,var(--fg) 6%,transparent);padding:0 14px;font:inherit;font-weight:600;font-size:16px;color:var(--fg);outline:none;transition:box-shadow .2s,background .2s;width:100%}
.au-f select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,currentColor 50%),linear-gradient(135deg,currentColor 50%,transparent 50%);background-position:calc(100% - 18px) 22px,calc(100% - 13px) 22px;background-size:5px 5px;background-repeat:no-repeat}
.au-f input:focus,.au-f select:focus{box-shadow:inset 0 0 0 2px var(--ac);background:var(--card)}
.au-eye{position:absolute;right:8px;bottom:8px;width:34px;height:34px;border-radius:10px;display:grid;place-items:center;color:var(--mut)}.au-eye.on{color:var(--ac)}
.au-go{margin-top:4px;width:100%}
.au-alt{font-size:14px;color:var(--mut);text-align:center}.au-alt button,.au-alt a{color:var(--ac);font-weight:800}
.au-msg{margin-top:12px;padding:0 14px;border-radius:12px;font-weight:700;font-size:14px;max-height:0;opacity:0;overflow:hidden;transition:all .35s}
.au-msg.on{max-height:90px;opacity:1;padding:12px 14px}
.au-msg.no{background:rgba(229,72,77,.12);color:#d93a40}.au-msg.ok{background:color-mix(in srgb,var(--ac) 14%,transparent);color:var(--ac)}
.au.done .au-go{pointer-events:none;opacity:.7}
@media(max-width:760px){.au-box{grid-template-columns:1fr;border-radius:22px}.au-side{display:none}.au-main{padding:22px 18px 20px}.au-row{grid-template-columns:1fr}}

/* стиль «Небо» на финальном лендинге */
.st-sky .fin-r .fc-dot{background:linear-gradient(#6fb1ff,#2f7bff)}
.ex-sol .sv-s{display:none;grid-template-columns:30px minmax(0,1fr);counter-increment:none}
.ex-sol .sv-s.on{display:grid}
.ex-sol .sv-s:before{content:none;display:none}
.ex-sol .sv-t{min-width:0;overflow-x:auto;overflow-y:hidden}
.ex-sol .sv-a{color:var(--acf);background:var(--ac)}.ex-sol .sv-a b,.ex-sol .sv-a .katex{color:var(--acf)}
.ex-sol .sv-a,.ex-sol .sv-a *{color:var(--acf)!important}
.ex-sol .sv-a b{font-size:22px}
@media(max-width:900px){.st-sky .sec-cl{display:none}}
.st-sky .sh{position:relative;z-index:1}
.ex-sol .sv-a .katex{font-size:1.25em!important}

/* регистрация: подсветка поля с ошибкой и подсказка правил */
.au-msg{margin:0 0 2px}.au-msg.on{margin:0 0 4px}
.au-f.bad input{box-shadow:inset 0 0 0 2px #e5484d!important}
.au-hint{font-size:12.5px;line-height:1.4;color:var(--mut);margin:-2px 0 0}

/* ═══ 21.10: шапка зафиксирована, подвал-гигант помещается, «Небо» в вёрстке «Бумаги» ═══ */
.nav.hide{transform:none!important}
.ft-word{display:flex;justify-content:center;font-size:12vw;padding:10px 0 34px;overflow:visible;width:100%;max-width:100%}
.ft-word span{flex:none}
.st-sky .ft{background:#0b1a3a;color:#f3f7ff}
.st-sky .ft-word{color:#4d8bff}
.st-sky .ft-bot{border-top-color:rgba(243,247,255,.16)}
.st-sky .fin-r .fc-dot{background:radial-gradient(circle at 50% 40%,#5d9bff,#2f6bff 70%)}
.st-sky .fin-r .fc-ring{border-color:rgba(255,255,255,.7)}
.st-sky .sk-sub{font-family:var(--fd);font-weight:600;letter-spacing:-.01em;background:none;backdrop-filter:none;-webkit-backdrop-filter:none;color:color-mix(in srgb,var(--fg) 70%,transparent);text-shadow:0 1px 18px rgba(255,255,255,.8)}
.st-sky .sk-word{letter-spacing:-.06em}
.st-sky .sk-sub{position:relative;z-index:4;color:var(--fg);opacity:0;text-shadow:0 0 14px #fff,0 0 28px #fff,0 2px 40px rgba(255,255,255,.9)}
.st-sky .sk-wc{z-index:3}
@media(max-width:700px){.st-sky .sk-sub{font-size:clamp(11px,3.3vw,15px);padding:6px 12px;white-space:nowrap;max-width:94vw}.hm-sub{font-size:clamp(11px,3.3vw,15px)}}
/* ═══ 22.10: чертежи ОГЭ/ЕГЭ на лендинге (стили SVG как в приложении), решение с чертежом, плавающая подсказка ═══ */
.ex-app{--xv-tx:#1d2433;--xv-tx2:#4a5468;--xv-tx3:#8a93a6;--xv-ac:#2f7bff;--xv-hl:#e59a12;--xv-card:#fff}
.ex-app svg.exv{overflow:visible;font-family:Inter,system-ui,sans-serif;display:block;max-width:100%;height:auto}
.ex-app svg.exv text{font-style:normal}
.ex-app .exv .exv-main{stroke:var(--xv-tx);stroke-width:2}
.ex-app .exv .exv-acc{stroke:var(--xv-ac);stroke-width:2.4}
.ex-app .exv .exv-hl{stroke:var(--xv-hl);stroke-width:2.2}
.ex-app .exv .exv-mut{stroke:var(--xv-tx3);stroke-width:1.5}
.ex-app .exv .exv-grid{stroke:rgba(29,36,51,.12);stroke-width:1}
.ex-app .exv .exv-grid2{stroke:rgba(29,36,51,.2);stroke-width:1}
.ex-app .exv .exv-soft{stroke:rgba(47,123,255,.6);stroke-width:1.6}
.ex-app .exv .exv-dash{stroke-dasharray:6 5}
.ex-app .exv .exv-thin{stroke-width:1.4}
:where(.ex-app .exv) :where(line,path,polyline,circle,ellipse,polygon){fill:none}
.ex-app .exv .exv-nofill{fill:none}
.ex-app .exv .exv-fill-acc{fill:rgba(47,123,255,.16)}
.ex-app .exv .exv-fill-hl{fill:rgba(229,154,18,.18)}
.ex-app .exv .exv-fill-soft{fill:rgba(29,36,51,.07)}
.ex-app .exv .exv-hatch{fill:rgba(47,123,255,.28)}
.ex-app .exv .exv-axis{stroke:var(--xv-tx2);stroke-width:1.4}
.ex-app .exv .exv-axhead{fill:var(--xv-tx2)}
.ex-app .exv .exv-axl{font-size:12px;font-style:italic!important;fill:var(--xv-tx2)}
.ex-app .exv .exv-tick{font-size:11px;fill:var(--xv-tx3)}
.ex-app .exv .exv-tick-s{font-size:9.5px}
.ex-app .exv .exv-dot{stroke:none}
.ex-app .exv .exv-dot-main{fill:var(--xv-tx)}.ex-app .exv .exv-dot-acc{fill:var(--xv-ac)}.ex-app .exv .exv-dot-hl{fill:var(--xv-hl)}.ex-app .exv .exv-dot-mut{fill:var(--xv-tx3)}
.ex-app .exv .exv-hollow{fill:var(--xv-card)!important;stroke:var(--xv-ac);stroke-width:2}
.ex-app .exv .exv-head-main{fill:var(--xv-tx)}.ex-app .exv .exv-head-acc{fill:var(--xv-ac)}.ex-app .exv .exv-head-hl{fill:var(--xv-hl)}.ex-app .exv .exv-head-mut{fill:var(--xv-tx3)}
.ex-app .exv .exv-lbl{font:700 14px Inter,system-ui,sans-serif;font-style:italic!important}
.ex-app .exv .exv-t{font-size:12.5px;font-weight:600}
.ex-app .exv .exv-t-main{fill:var(--xv-tx)}.ex-app .exv .exv-t-acc{fill:var(--xv-ac)}.ex-app .exv .exv-t-hl{fill:var(--xv-hl)}.ex-app .exv .exv-t-mut{fill:var(--xv-tx2)}
.ex-app .exv .exv-bold{font-weight:900}.ex-app .exv .exv-sub{font-size:10px}
.ex-app .exv .exv-radp{fill:none;stroke:var(--xv-tx);stroke-width:1.3}
.ex-app .exv .exv-new{animation:exvIn .7s ease both}
.ex-app .exv line.exv-new,.ex-app .exv path.exv-new,.ex-app .exv polyline.exv-new{stroke-dasharray:600;animation:exvDraw 1s ease both}
@keyframes exvIn{from{opacity:0}to{opacity:1}}
@keyframes exvDraw{from{stroke-dashoffset:600}to{stroke-dashoffset:0}}
.ex-fig{align-items:flex-start}
.ex-multi{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.ex-multi figure{margin:0;padding:6px 6px 4px;border-radius:12px;background:#f5f7fb;text-align:center}
.ex-multi figcaption{font:800 14px var(--fd,inherit);color:#1d2433;margin-bottom:2px}
.ex-rot{position:relative;cursor:grab;touch-action:none;user-select:none}.ex-rot.drag{cursor:grabbing}
.ex-rothint{display:block;text-align:center;font-size:11.5px;color:#8a93a6;margin-top:2px}
/* решение по шагам: «Дано / Найти» + чертёж, который достраивается по шагам */
.sv-idea,.sv-rule{margin:0 0 12px;padding:11px 14px;border-radius:12px;font-size:14.5px;line-height:1.5;background:color-mix(in srgb,var(--ac) 9%,transparent)}
.sv-idea b,.sv-rule b{display:inline-block;margin-right:6px;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ac)}
.sv-sheet{display:grid;gap:14px;margin:0 0 14px;align-items:start}
.sv-sheet.two{grid-template-columns:minmax(0,1fr) auto}
.sv-given{padding:14px 16px;border-radius:14px;box-shadow:inset 0 0 0 1px var(--line);font-size:15px;line-height:1.6}
.sv-given ul{list-style:none;margin:0 0 6px;padding:0}.sv-given li{padding:1px 0}
.sv-gh{font-size:11px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--ac);margin:2px 0 4px}
.sv-given .sv-gh+ul+.sv-gh{border-top:1px dashed var(--line);padding-top:8px;margin-top:6px}
.sv-figw{justify-self:center;max-width:100%}
.sv-fig{background:#fff;border-radius:14px;padding:10px;box-shadow:0 0 0 1px var(--line);max-width:100%;overflow:hidden}
.sv-fig svg{max-width:100%;height:auto;display:block;margin:0 auto}
.sv-figcap{font-size:11.5px;color:var(--mut);text-align:center;margin-top:6px}
@media(max-width:700px){.sv-sheet.two{grid-template-columns:1fr}}
/* название номера: плавающая подсказка поверх страницы (раньше обрезалась прокруткой списка и уезжала под шапку) */
.ex-nums button[data-tip]:hover:after{content:none!important;display:none!important}
.ex-tip{position:fixed;left:0;top:0;z-index:9999;max-width:240px;padding:8px 11px;border-radius:10px;background:#141a26;color:#fff;font:600 12.5px/1.35 var(--fb,system-ui),sans-serif;text-align:center;pointer-events:none;opacity:0;transition:opacity .15s;box-shadow:0 10px 30px -10px rgba(0,0,0,.45)}
.ex-tip.on{opacity:1}
.ex-app .exv .exv-sect{stroke:#ef4444;stroke-width:2.8}.ex-app .exv .exv-fill-sect{fill:rgba(239,68,68,.28)}.ex-app .exv .exv-dot-sect{fill:#ef4444}.ex-app .exv .exv-t-sect{fill:#ef4444}
.ex-app .exv .exv-ok{stroke:#16a34a;stroke-width:2.2}.ex-app .exv .exv-dot-ok{fill:#16a34a}.ex-app .exv .exv-t-ok{fill:#16a34a}.ex-app .exv .exv-head-ok{fill:#16a34a}
.ex-app .exv .exv-bad{stroke:#e11d48;stroke-width:2.2}.ex-app .exv .exv-dot-bad{fill:#e11d48}.ex-app .exv .exv-t-bad{fill:#e11d48}.ex-app .exv .exv-head-bad{fill:#e11d48}
.ex-sol .sv-given ul{display:block;margin:0 0 6px}
.ex-sol .sv-given li{display:block;padding:1px 0;background:none;border-radius:0;counter-increment:none;font-size:15px;overflow:visible}
.ex-sol .sv-given li:before{content:none;display:none}

/* 23.10: возрастная маркировка 12+ в подвале */
.ft-age{display:inline-grid;place-items:center;min-width:34px;height:22px;padding:0 6px;margin-left:6px;border:1.5px solid currentColor;border-radius:6px;font-weight:800;font-size:11.5px;vertical-align:middle;opacity:.8}
/* 24.10: тур без зума — сайдбар слева виден целиком */
.tr-s{transform:none!important}
.tr-s img{object-fit:contain;object-position:top left;background:#eaf3ff}
.tr-s.on img{animation:none!important;transform:none!important}
/* 27.10: без полосы прокрутки — листаем колесом/пальцами; поле «Школа или формат» на всю ширину */
html,body,.au-box,.au-main{scrollbar-width:none;-ms-overflow-style:none}
html::-webkit-scrollbar,body::-webkit-scrollbar,.au-box::-webkit-scrollbar,.au-main::-webkit-scrollbar{display:none;width:0;height:0}
.au-box{overscroll-behavior:contain;-webkit-overflow-scrolling:touch;touch-action:pan-y}
.au-row[data-only="teacher"],.au-row[data-only="student"]:has(> :only-child){grid-template-columns:1fr}
.au-f span{white-space:normal;line-height:1.3}
.au-f input::placeholder{text-overflow:ellipsis}
.pal{display:none!important}

/* ═════ 27.10: раздел «Ученикам, родителям и учителям» ═════ */
.rl .sh{margin-left:auto;margin-right:auto;text-align:center}
.rl-tabs{position:relative;display:flex;gap:4px;width:max-content;max-width:100%;margin:0 auto 26px;padding:5px;border-radius:999px;background:color-mix(in srgb,var(--fg) 7%,transparent);overflow-x:auto}
.rl-tabs button{position:relative;z-index:1;border:0;background:none;padding:12px 22px;border-radius:999px;font:700 15.5px var(--fb);color:var(--mut);cursor:pointer;white-space:nowrap;display:flex;gap:8px;align-items:center;transition:color .25s}
.rl-tabs button.on{color:var(--fg)}
.rl-ind{position:absolute;left:0;top:5px;bottom:5px;border-radius:999px;background:var(--card);box-shadow:0 6px 18px -8px rgba(12,37,71,.35);transition:transform .45s cubic-bezier(.2,1,.3,1),width .45s cubic-bezier(.2,1,.3,1)}
.rl-stage{position:relative}
.rl-pane{display:none;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:44px;align-items:center}
.rl-pane.on{display:grid}
.rl-txt h3{font-size:clamp(24px,2.6vw,36px);line-height:1.12;letter-spacing:-.02em;margin:0 0 14px}
.rl-txt p{color:var(--mut);font-size:17px;line-height:1.55;margin:0 0 18px}
.rl-txt ul{list-style:none;padding:0;margin:0 0 24px;display:grid;gap:10px}
.rl-txt li{display:flex;gap:10px;align-items:center;font-weight:600}
.rl-txt li svg{flex:none;color:var(--ac)}
.rl-note{display:block;margin-top:12px;color:var(--mut);font-size:13.5px}
.rl-pane.play .rl-txt>*{animation:rlUp .6s cubic-bezier(.2,1,.3,1) both}
.rl-pane.play .rl-txt>*:nth-child(2){animation-delay:.06s}.rl-pane.play .rl-txt>*:nth-child(3){animation-delay:.12s}.rl-pane.play .rl-txt>*:nth-child(4){animation-delay:.18s}
@keyframes rlUp{from{opacity:0;transform:translateY(14px)}}
.rl-win{border-radius:24px;overflow:hidden;background:#fff;color:#0c2547;box-shadow:0 40px 80px -40px rgba(12,37,71,.55),0 0 0 1px rgba(12,37,71,.08)}
.rl-bar0{display:flex;align-items:center;gap:6px;padding:11px 14px;background:#f2f6fc;border-bottom:1px solid #e3eaf4}
.rl-bar0 i{width:10px;height:10px;border-radius:50%;background:#ff6b6b}.rl-bar0 i:nth-child(2){background:#ffc145}.rl-bar0 i:nth-child(3){background:#34c47c}
.rl-bar0 span{margin-left:10px;padding:4px 12px;border-radius:999px;background:#fff;font:600 12.5px var(--fb);color:#5a6d88}
.rl-body{padding:22px;background:linear-gradient(180deg,#eaf4ff,#fff 70%);min-height:330px}
.rl-demo{display:grid;grid-template-columns:auto 1fr;gap:22px;align-items:start}
.rl-par,.rl-tch{grid-template-columns:1fr 1fr}
.rl-col{display:grid;gap:8px;align-content:start}
.rl-h{font:800 12px var(--fb);letter-spacing:.12em;text-transform:uppercase;color:#7d90ad;margin-bottom:2px}
.rl-ring{position:relative;width:150px;display:grid;justify-items:center;text-align:center}
.rl-ring svg{width:150px;height:150px;transform:rotate(-90deg)}
.rl-ring circle{fill:none;stroke-width:12}.rl-ring .bg{stroke:#e3ecf8}.rl-ring .fg{stroke:#2f7bff;stroke-linecap:round;stroke-dasharray:0 100}
.rl-pane.play .rl-ring .fg{animation:rlRing 1.1s .1s cubic-bezier(.2,1,.3,1) forwards}
@keyframes rlRing{to{stroke-dasharray:67 100}}
.rl-ring b{position:absolute;top:50px;font:800 32px var(--fd);color:#0c2547}.rl-ring small{color:#5a6d88;font-weight:700;font-size:13px;margin-top:6px}
.rl-bar{display:grid;grid-template-columns:1fr 46%;gap:10px;align-items:center;font-size:13.5px;font-weight:700}
.rl-bar u{height:10px;border-radius:6px;background:#e3ecf8;overflow:hidden;display:block}
.rl-bar u i{display:block;height:100%;width:0;border-radius:6px;background:#14a37f}
.rl-bar u i.o{background:#f0a020}.rl-bar u i.r{background:#e5484d}
.rl-pane.play .rl-bar u i{animation:rlW .9s calc(var(--i,0)*.08s + .2s) cubic-bezier(.2,1,.3,1) forwards}
@keyframes rlW{to{width:var(--w)}}
.rl-plan{display:grid;gap:6px}
.rl-plan div{display:grid;grid-template-columns:30px 1fr auto;gap:10px;align-items:center;padding:9px 12px;border-radius:14px;background:#fff;box-shadow:0 0 0 1px #e3eaf4;font-size:13.5px}
.rl-plan em{width:30px;height:30px;border-radius:10px;display:grid;place-items:center;background:#2f7bff;color:#fff;font:800 14px var(--fd);font-style:normal}
.rl-plan small{color:#7d90ad;font-weight:700}
.rl-pane.play .rl-plan div,.rl-pane.play .rl-weak,.rl-pane.play .rl-kid{animation:rlUp .5s calc(var(--i,0)*.07s + .3s) both}
.rl-kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:8px}
.rl-kpis div{padding:12px;border-radius:16px;background:#fff;box-shadow:0 0 0 1px #e3eaf4}
.rl-kpis b{display:block;font:800 24px var(--fd)}.rl-kpis small{color:#5a6d88;font-size:12px;font-weight:700}
.rl-cal{display:grid;grid-template-columns:repeat(7,1fr);gap:5px}
.rl-cal i{aspect-ratio:1;border-radius:6px;background:#e3ecf8}
.rl-cal i.a1{background:#bfdcff}.rl-cal i.a2{background:#6fb0ff}.rl-cal i.a3{background:#2f7bff}
.rl-pane.play .rl-cal i{animation:rlPop .35s calc(var(--i)*.02s + .2s) both}
@keyframes rlPop{from{transform:scale(.3);opacity:0}}
.rl-weak{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:10px 12px;border-radius:14px;background:#fff;box-shadow:0 0 0 1px #e3eaf4}
.rl-weak b{display:block;font-size:14px}.rl-weak small{color:#7d90ad;font-weight:600;font-size:12.5px}
.rl-weak span{padding:3px 10px;border-radius:999px;background:#fdeceb;color:#e5484d;font-weight:800;font-size:13px}
.rl-hw{display:grid;grid-template-columns:auto 1fr;gap:2px 10px;align-items:center;padding:9px 12px;border-radius:14px;background:#fff;box-shadow:0 0 0 1px #e3eaf4;font-size:13.5px}
.rl-hw span{grid-row:1/3;font-size:20px}.rl-hw small{color:#7d90ad;font-weight:600}
.rl-room{position:relative;padding:12px;border-radius:18px;background:linear-gradient(180deg,#f6efe4,#efe3d0);box-shadow:inset 0 0 0 1px rgba(120,90,40,.15)}
.rl-board{margin:0 auto 12px;width:70%;padding:6px;border-radius:8px;background:#2e5a4b;border:4px solid #b78b57;color:rgba(255,255,255,.85);text-align:center;font:700 11px var(--fd);letter-spacing:.14em;text-transform:uppercase}
.rl-desks{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.rl-desk{display:grid;grid-template-columns:1fr 1fr;gap:4px;padding:6px;border-radius:10px;background:#fffaf2;box-shadow:0 6px 12px -8px rgba(90,60,20,.6),inset 0 0 0 1px rgba(120,90,40,.18)}
.rl-kid{border:0;background:none;padding:3px 0;display:grid;justify-items:center;gap:3px;cursor:pointer;border-radius:8px;transition:transform .15s,background .15s}
.rl-kid:hover{transform:translateY(-2px)}.rl-kid.sel{background:#dce9ff}
.rl-kid i{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;font:800 12px var(--fd);font-style:normal;color:#fff;background:linear-gradient(135deg,#6fb0ff,#2f7bff);box-shadow:0 0 0 2px #fff,0 0 0 4px var(--rc)}
.rl-kid b{font-size:11px}
.rl-free{display:grid;place-items:center;color:rgba(120,90,40,.4);font-weight:800;border:1.5px dashed rgba(120,90,40,.25);border-radius:8px;min-height:50px}
.rl-tip{margin:10px 0 0;text-align:center;font-size:12.5px;font-weight:700;color:#8a6a3a}
.r-g{--rc:#14a37f}.r-o{--rc:#f0a020}.r-r{--rc:#e5484d}.r-n{--rc:#b8c4d6}
.rl-card{padding:14px;border-radius:18px;background:#fff;box-shadow:0 0 0 1px #e3eaf4}
.rl-card.pop{animation:rlUp .4s cubic-bezier(.2,1,.3,1)}
.rl-card .rl-bar u i{width:var(--w)}
.rl-who{display:flex;gap:10px;align-items:center;margin-bottom:6px}
.rl-who i{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;font:800 15px var(--fd);font-style:normal;color:#fff;background:linear-gradient(135deg,#6fb0ff,#2f7bff);box-shadow:0 0 0 3px #fff,0 0 0 6px var(--rc)}
.rl-who b{display:block}.rl-who small{color:#7d90ad;font-weight:600}
.rl-mini{margin-top:4px;border:0;border-radius:999px;padding:9px 14px;background:#2f7bff;color:#fff;font:800 13px var(--fb);cursor:pointer}
.rl-how{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:40px}
.rl-how div{padding:18px 20px;border-radius:20px;background:var(--card);box-shadow:inset 0 0 0 1px var(--line)}
.rl-how b{display:block;font:800 20px var(--fd);letter-spacing:.02em;color:var(--ac)}
.rl-how span{color:var(--mut);font-size:14.5px}
@media(max-width:960px){.rl-pane{grid-template-columns:1fr;gap:26px}.rl-how{grid-template-columns:1fr}}
@media(max-width:620px){.rl-demo,.rl-par,.rl-tch{grid-template-columns:1fr}.rl-ring{margin:0 auto}.rl-tabs button{padding:10px 14px;font-size:14px}.rl-body{padding:14px}}
@media(prefers-reduced-motion:reduce){.rl-pane *{animation:none!important}.rl-bar u i{width:var(--w)!important}.rl-ring .fg{stroke-dasharray:67 100}}
.nav-l a{white-space:nowrap}