/* Золотое сечение: φ = 1.618. Колонки φ : 1, шкала шрифтов ×φ от 16 px, отступы по Фибоначчи (8, 13, 21, 34, 55), фото 1.618 : 1. */
:root{--phi:1.618;--f1:8px;--f2:13px;--f3:21px;--f4:34px;--f5:55px;--max:1157px;
  --t0:12.3px;--t1:16px;--t2:20.4px;--t3:25.9px;--t4:41.9px}
body{font-size:var(--t1)}
/* ритм секций */
.section{padding:var(--f4) 0!important}
.section-head{margin-bottom:var(--f3)!important}
.hero{padding:var(--f4) 0 var(--f3)!important}
/* типографика */
h1{font-size:clamp(28px,4.4vw,var(--t4))!important;line-height:1.1!important}
.section h2,.cta h2{font-size:clamp(22px,2.6vw,var(--t3))!important;line-height:1.18!important}
.pj-body h3,.channel h2{font-size:var(--t2)!important}
.hero-lead,.hero p{font-size:var(--t1)!important}
.pj-body p,.price-note,.case-note,.benefit,.svc span{font-size:var(--t0)!important}
.svc b,.benefit b,.work-step h3{font-size:14.5px!important}
/* главная колонка : боковая = φ : 1 */
.hero .wrap{grid-template-columns:minmax(0,1.618fr) minmax(0,1fr)!important;column-gap:var(--f4)!important}
.duo{grid-template-columns:minmax(0,1.618fr) minmax(0,1fr)!important;gap:var(--f3)!important}
/* проекты: большая карточка слева (φ), две малые справа (1) */
.pj-grid{grid-template-columns:minmax(0,1.618fr) minmax(0,1fr)!important;grid-template-rows:auto auto;gap:var(--f2)!important}
.pj:nth-child(1){grid-row:1 / span 2}
.pj:nth-child(n+2){display:grid!important;grid-template-columns:minmax(0,1.2fr) minmax(0,1.618fr)}
.pj:nth-child(n+2) .pj-gal{order:2}
.pj:nth-child(n+2) .pj-gal .shot{height:100%!important;aspect-ratio:auto!important;border-bottom:0!important;border-left:1px solid var(--line)!important;min-height:150px}
.pj:nth-child(n+2) .pj-body{order:1;padding:var(--f2)}
.pj:nth-child(n+2) .pj-body h3{font-size:var(--t1)!important}
.pj:nth-child(n+2) .case-tag{display:none}
.pj:nth-child(1) .pj-gal .shot{aspect-ratio:1.618/1!important}
.pj-body{padding:var(--f2) var(--f3) var(--f3)}
.pj-grid{align-items:stretch}
/* услуги: сетка 4 x 2, плашки пользы и шаги по сетке */
.svc{gap:var(--f1)!important}
.benefits{gap:var(--f2)!important;margin-top:var(--f2)!important}
.cta{padding:var(--f3) var(--f4)!important;margin:var(--f3) 0 var(--f4)!important;grid-template-columns:minmax(0,1.618fr) minmax(0,1fr)!important}
.cta .btn{justify-self:end}
.proof div{padding:var(--f2) var(--f3)!important}
@media(max-width:900px){
  .hero .wrap{display:block!important}
  .duo,.pj-grid,.cta{grid-template-columns:1fr!important}
  .pj:nth-child(1){grid-row:auto}
  .pj:nth-child(n+2){display:flex!important}
  .pj:nth-child(n+2) .pj-gal .shot{aspect-ratio:1.618/1!important;border-left:0!important;border-bottom:1px solid var(--line)!important}
  .pj:nth-child(n+2) .case-tag{display:inline-block}
  .cta .btn{justify-self:start}
  .pj:nth-child(n+2) .pj-gal,.pj:nth-child(n+2) .pj-body{order:0!important}
}
/* Выравнивание геометрии */
.hero .wrap>.proof{grid-row:1 / span 6!important;margin-top:0!important;align-self:stretch;grid-template-rows:1fr 1fr}
.proof div{display:flex;flex-direction:column;justify-content:center}
.pj-grid{grid-template-rows:1fr 1fr!important}
.pj:nth-child(n+2){grid-template-columns:minmax(0,1.2fr) minmax(0,1fr)!important}
.pj:nth-child(n+2) .pj-gal .shot{min-height:0!important}
.pj:nth-child(n+2) .pj-body{justify-content:space-between}
.duo{align-items:stretch!important}
.duo>section,.duo>section>.wrap,.duo .channel-card{height:100%}
.duo>section.channel{display:flex}
.duo>section.channel>.wrap{display:flex}
.channel-card{display:flex!important;align-items:center}
.channel-copy{width:100%}
.work-steps-grid{height:calc(100% - 0px)}
@media(max-width:900px){
  .hero .wrap>.proof{grid-row:auto!important;margin-top:var(--f3)!important}
  .pj-grid{grid-template-rows:auto!important}
  .duo>section,.duo>section>.wrap,.duo .channel-card{height:auto}
}
/* 2-я итерация геометрии */
.work-steps>.wrap{height:100%;display:flex;flex-direction:column}
.work-steps-grid{flex:1;height:auto!important;grid-auto-rows:1fr;align-content:stretch}
.work-step{align-items:center}
.pj:nth-child(n+2){display:flex!important;flex-direction:column!important;grid-template-columns:none!important}
.pj:nth-child(n+2) .pj-gal{order:0!important;flex:1;min-height:0}
.pj:nth-child(n+2) .pj-gal .shot{height:100%!important;border-left:0!important;border-bottom:1px solid var(--line)!important}
.pj:nth-child(n+2) .pj-body{order:1!important;display:grid;grid-template-columns:1fr auto;align-items:center;gap:4px var(--f2);padding:var(--f2)!important}
.pj:nth-child(n+2) .pj-body h3{grid-column:1}
.pj:nth-child(n+2) .pj-body p{grid-column:1}
.pj:nth-child(n+2) .pj-note{display:none}
.pj:nth-child(n+2) .pj-actions{grid-column:2;grid-row:1 / span 2;margin:0;padding:0}
.pj:nth-child(n+2) .case-tag{display:none}
@media(max-width:900px){
  .work-steps>.wrap{height:auto}
  .pj:nth-child(n+2) .pj-body{display:flex}
  .pj:nth-child(n+2) .pj-gal{flex:none}
  .pj:nth-child(n+2) .pj-gal .shot{height:auto!important}
  .pj:nth-child(n+2) .pj-note{display:block}
  .pj:nth-child(n+2) .case-tag{display:inline-block}
}
/* 3-я итерация: высота сетки задаёт большая карточка (φ), правые подстраиваются */
.pj-grid{grid-template-rows:minmax(0,1fr) minmax(0,1fr)!important}
.pj{min-height:0}
.pj:nth-child(1) .pj-body{flex:none!important}
.pj:nth-child(n+2){overflow:hidden}
.pj:nth-child(n+2) .pj-body{flex:none!important;align-content:center;grid-template-rows:auto auto!important;padding:var(--f2) var(--f2)!important}
.pj:nth-child(n+2) .pj-gal{position:relative;overflow:hidden}
.pj:nth-child(n+2) .pj-gal .shot{position:absolute!important;inset:0;width:100%;height:100%!important}
.pj-body h3{margin:0 0 2px!important}
@media(max-width:900px){
  .pj:nth-child(n+2) .pj-gal{height:auto}
  .pj:nth-child(n+2) .pj-gal .shot{position:relative!important;aspect-ratio:1.618/1!important;height:auto!important}
}
@media(max-width:900px){
  .pj:nth-child(n+2) .pj-body{align-items:flex-start!important;text-align:left!important;flex-direction:column!important;gap:8px!important}
  .pj:nth-child(n+2) .pj-actions{margin-top:4px}
}
/* Блок для родителей: текст φ : фото 1 */
.tutor{padding:var(--f3) 0 var(--f2)!important}
.tutor-card{display:grid;grid-template-columns:minmax(0,1.618fr) minmax(0,1fr);gap:var(--f4);align-items:center;padding:var(--f4);border-radius:24px;background:linear-gradient(135deg,#192433,#21162f);color:#fff;border:1px solid #ffffff1a;position:relative;overflow:hidden}
.tutor-card:after{content:"";position:absolute;width:300px;height:300px;border-radius:50%;background:var(--lime);filter:blur(120px);opacity:.14;left:-80px;bottom:-120px;pointer-events:none}
.tutor-copy{position:relative;z-index:1}
.tutor-card .case-tag{color:var(--lime);background:#c8ff3d1f;border-color:#c8ff3d55}
.tutor h2{font-size:clamp(24px,3.2vw,var(--t4))!important;line-height:1.12!important;letter-spacing:-.04em;margin:var(--f2) 0 var(--f1)!important;color:#fff}
.tutor-lead{font-size:var(--t2);color:#d0d8e6;margin:0 0 var(--f2);max-width:640px}
.tutor-list{list-style:none;margin:0 0 var(--f3);padding:0;display:grid;gap:var(--f1)}
.tutor-list li{position:relative;padding-left:22px;font-size:15px;color:#e8edf6}
.tutor-list li:before{content:"";position:absolute;left:0;top:.5em;width:8px;height:8px;border-radius:50%;background:var(--lime);box-shadow:0 0 12px #c8ff3d99}
.tutor-actions{display:flex;flex-wrap:wrap;gap:var(--f2)}
.tutor-card .btn.ghost{color:#fff;border-color:#ffffff40;background:#ffffff12}
.tutor-note{margin:var(--f2) 0 0;font-size:11.5px;color:#9fb0c8}
.tutor-pic{position:relative;z-index:1}
.tutor-pic .shot{aspect-ratio:1.618/1!important;border-radius:18px;box-shadow:0 20px 50px #0007}
.steps-row .work-steps{padding:0!important}
.steps-row{width:min(var(--max),calc(100% - 36px));margin:var(--f3) auto 0}
.steps-row .work-steps>.wrap{width:100%!important;height:auto!important;display:grid!important;grid-template-columns:minmax(0,1fr) minmax(0,1.618fr);gap:var(--f3);align-items:center}
.steps-row .section-head{margin:0!important}
.steps-row .work-steps-grid{grid-template-columns:repeat(3,minmax(0,1fr))!important;height:auto!important}
@media(max-width:900px){
  .tutor-card{grid-template-columns:1fr;padding:var(--f3);gap:var(--f3)}
  .steps-row .work-steps>.wrap{grid-template-columns:1fr}
  .steps-row .work-steps-grid{grid-template-columns:1fr!important}
}
/* ===== Отдельные плашки: бот-репетитор, Литератор ===== */
.chat{max-width:340px;margin:0 auto;border-radius:26px;background:#0b1220;border:1px solid #ffffff22;box-shadow:0 24px 60px #000a;overflow:hidden;font:13.5px/1.45 Manrope,system-ui,sans-serif;color:#e8edf6}
.chat-head{display:flex;gap:12px;align-items:center;padding:13px 16px;background:linear-gradient(135deg,#2a6df4,#7b4dff)}
.chat-head i{width:36px;height:36px;border-radius:50%;background:#ffffff33;display:block;position:relative}
.chat-head i:after{content:"✦";position:absolute;inset:0;display:grid;place-items:center;color:#fff;font-style:normal}
.chat-head b{display:block;font-size:14px}.chat-head span{font-size:11.5px;opacity:.85}
.chat-body{padding:16px 14px;display:grid;gap:10px;background:radial-gradient(circle at 20% 0,#1a2540,#0b1220 60%)}
.msg{max-width:88%;padding:9px 12px;border-radius:16px}
.msg.me{justify-self:end;background:#2a6df4;color:#fff;border-bottom-right-radius:5px}
.msg.bot{justify-self:start;background:#1b2740;border:1px solid #ffffff14;border-bottom-left-radius:5px}
.msg small{display:block;color:var(--lime);font-weight:700;font-size:11px;margin-bottom:2px}
.chat-foot{padding:8px 14px 12px;font-size:11px;color:#8da0bd;text-align:center;background:#0b1220}
.tutor-pic{display:grid;place-items:center}
/* Литератор: золотая плашка, фирменные фиолетовые тона приложения */
.lit{padding:var(--f2) 0!important}
.lit-card{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.618fr);gap:var(--f4);align-items:center;padding:var(--f4);border-radius:24px;background:radial-gradient(circle at 85% 10%,#3b1f7a66,transparent 55%),linear-gradient(135deg,#0a1030,#1a1245);color:#fff;border:1px solid #8b72ff44;box-shadow:0 20px 60px #1a124533}
.lit-tag{display:inline-block;font:700 10.5px/1 Manrope,sans-serif;letter-spacing:.14em;text-transform:uppercase;color:#c9b8ff;background:#8b72ff26;border:1px solid #8b72ff66;padding:7px 11px;border-radius:999px}
.lit h2{font-size:clamp(24px,2.9vw,var(--t3))!important;line-height:1.15!important;margin:var(--f2) 0 var(--f1)!important;letter-spacing:-.035em;color:#fff}
.lit-lead{font-size:var(--t1);color:#cfd6f0;margin:0 0 var(--f2)}
.lit-list{list-style:none;margin:0 0 var(--f3);padding:0;display:grid;gap:var(--f1)}
.lit-list li{position:relative;padding-left:22px;font-size:14px;color:#e6e9fb}
.lit-list li:before{content:"";position:absolute;left:0;top:.5em;width:8px;height:8px;border-radius:50%;background:#a58bff;box-shadow:0 0 12px #a58bffaa}
.lit-actions{display:flex;flex-wrap:wrap;gap:var(--f2)}
.lit-card .btn.primary{background:linear-gradient(135deg,#7b61ff,#c04dff);border-color:transparent;color:#fff}
.lit-card .btn.ghost{color:#fff;border-color:#ffffff40;background:#ffffff12}
.lit-gal{display:grid;gap:var(--f1)}
.lit-gal .shot{aspect-ratio:1.618/1!important;border-radius:16px;border-color:#8b72ff44}
.lit-thumbs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--f1)}
.lit-thumbs .shot{aspect-ratio:1.618/1!important;border-radius:11px}
.lit-thumbs .cap{display:none}
/* примеры: два блока φ : 1, фото сверху */
.ex-grid{display:grid;grid-template-columns:minmax(0,1.618fr) minmax(0,1fr);gap:var(--f2)}
.ex{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:var(--r);background:linear-gradient(145deg,var(--panel2),var(--panel));overflow:hidden}
.ex .pj-gal .shot{width:100%;aspect-ratio:1.618/1!important;border-radius:0!important;border:0!important;border-bottom:1px solid var(--line)!important}
.ex .pj-body{padding:var(--f2) var(--f3) var(--f3);flex:1}
.ex .pj-actions{margin-top:auto}
.cases{padding-top:var(--f2)!important}
@media(max-width:900px){.lit-card,.ex-grid{grid-template-columns:1fr}.lit-card{padding:var(--f3)}}
.ex:nth-child(2) .pj-gal{flex:1;position:relative;min-height:200px}
.ex:nth-child(2) .pj-gal .shot{position:absolute!important;inset:0;height:100%!important;aspect-ratio:auto!important}
@media(max-width:900px){.ex:nth-child(2) .pj-gal{min-height:0}.ex:nth-child(2) .pj-gal .shot{position:relative!important;aspect-ratio:1.618/1!important;height:auto!important}}
/* ===== 3D-локации и фигурки: плашка (галерея 1.618 : текст 1) ===== */
.loc{padding:var(--f2) 0!important}
.loc-card{display:grid;grid-template-columns:minmax(0,1.618fr) minmax(0,1fr);gap:var(--f4);align-items:center;padding:var(--f4);border-radius:24px;background:radial-gradient(circle at 10% 90%,#ff3b3b26,transparent 55%),linear-gradient(135deg,#1a0b14,#0c0f26);color:#fff;border:1px solid #ff5a5a40;box-shadow:0 20px 60px #1a0b1433}
.loc-tag{display:inline-block;font:700 10.5px/1 Manrope,sans-serif;letter-spacing:.14em;text-transform:uppercase;color:#ffb3b3;background:#ff5a5a22;border:1px solid #ff5a5a66;padding:7px 11px;border-radius:999px}
.loc h2{font-size:clamp(24px,2.9vw,var(--t3))!important;line-height:1.15!important;margin:var(--f2) 0 var(--f1)!important;letter-spacing:-.035em;color:#fff}
.loc-lead{font-size:var(--t1);color:#e2d2dc;margin:0 0 var(--f2)}
.loc-list{list-style:none;margin:0 0 var(--f3);padding:0;display:grid;gap:var(--f1)}
.loc-list li{position:relative;padding-left:22px;font-size:14px;color:#f0e6ec}
.loc-list li:before{content:"";position:absolute;left:0;top:.5em;width:8px;height:8px;border-radius:50%;background:#ff6b6b;box-shadow:0 0 12px #ff6b6baa}
.loc-actions{display:flex;flex-wrap:wrap;gap:var(--f2)}
.loc-card .btn.primary{background:linear-gradient(135deg,#ff5a5a,#ff9a3d);border-color:transparent;color:#1a0b14}
.loc-card .btn.ghost{color:#fff;border-color:#ffffff40;background:#ffffff12}
.loc-note{margin:var(--f2) 0 0;font-size:11px;color:#b9a8b3;line-height:1.45}
.loc-gal{display:grid;gap:var(--f1)}
.loc-gal .shot{aspect-ratio:1.618/1!important;border-radius:16px;border-color:#ff5a5a40}
.loc-thumbs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--f1)}
.loc-thumbs .shot{border-radius:11px}
.loc-thumbs .cap{display:none}
@media(max-width:900px){.loc-card{grid-template-columns:1fr;padding:var(--f3)}.loc-copy{order:-1}}
.ex:first-child .pj-gal .shot{aspect-ratio:2.2/1!important}
.ex:first-child .pj-gal .shot img{object-position:50% 50%}
/* Фото в первом экране */
.hero-side{display:grid;gap:var(--f2);grid-column:2;grid-row:1 / span 6;align-self:start}
.hero .wrap>.hero-side .proof{grid-column:auto;grid-row:auto;margin:0!important;grid-template-columns:repeat(4,1fr)!important}
.hero-side .proof div{padding:var(--f1) var(--f2)!important}
.hero-side .proof b{font-size:15px!important}
.hero-side .proof span{font-size:10.5px!important}
.hero-photo{aspect-ratio:1.618/1!important;border-radius:var(--r)!important;box-shadow:0 18px 44px #0004}
.hero-photo img{object-position:20% 50%}
.loc-thumbs{grid-template-columns:repeat(4,minmax(0,1fr))!important}
@media(max-width:900px){.hero-side{grid-column:auto;grid-row:auto;margin-top:var(--f3)}.hero .wrap>.hero-side .proof{grid-template-columns:1fr 1fr!important}}
.hero .wrap>.hero-side{grid-column:2;grid-row:1 / span 6;align-self:start;margin:0}
@media(max-width:900px){.hero .wrap>.hero-side{grid-column:auto;grid-row:auto;margin-top:var(--f3)}}
/* Плавающая кнопка чата: внутри колонки контента, компактная, не выходит за края */
.sales-ai-open{right:max(12px,calc((100vw - min(var(--max),100vw - 36px))/2))!important;bottom:14px!important;padding:10px 16px!important;font-size:13.5px!important;max-width:calc(100vw - 24px);box-shadow:0 8px 24px #0004!important}
.sales-ai-panel{right:max(12px,calc((100vw - min(var(--max),100vw - 36px))/2))!important;bottom:60px!important;max-width:calc(100vw - 24px)}
footer .footer{padding-bottom:64px!important}
@media(max-width:560px){.sales-ai-open{right:12px!important;bottom:12px!important}}
/* Плавающая кнопка убрана: перекрывала текст. Чат открывается из шапки и кнопок «Хочу…»; шапка закреплена сверху. */
.sales-ai-open{display:none!important}
header{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 86%,transparent);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
header .nav{height:60px!important}
.sales-ai-panel{bottom:16px!important;right:max(12px,calc((100vw - min(var(--max),100vw - 36px))/2))!important}
footer .footer{padding-bottom:22px!important}
html{scroll-padding-top:70px}
html,body{overflow-x:clip!important}

/* Кнопка закрытия чата */
.sales-ai-head{display:flex;align-items:center;justify-content:space-between;gap:10px}
.sales-ai-panel .sales-ai-close{width:34px;height:34px;border:0;border-radius:50%;background:#eef2f7;color:#334155;font:400 24px/1 system-ui;cursor:pointer;display:grid;place-items:center;padding:0;flex:none}
.sales-ai-panel .sales-ai-close:hover{background:#dbe3ee}
.sales-ai-panel .sales-ai-close:focus-visible{outline:2px solid #2563eb;outline-offset:2px}
/* ===== Живая переписка ===== */
.chat.live{max-width:360px;width:100%}
.chat-head .ava{display:grid;place-items:center;font-style:normal;font-weight:800;font-size:17px;color:#fff;background:#ffffff33}
.chat-head .ava:after{content:none}
.chat-head span{display:flex;align-items:center;gap:6px}
.chat-head .dot{width:7px;height:7px;border-radius:50%;background:#7dff9a;box-shadow:0 0 8px #7dff9a;text-decoration:none;display:inline-block;animation:dotp 1.8s infinite}
@keyframes dotp{50%{opacity:.35}}
.chat.live .chat-body{height:300px;overflow:hidden;align-content:start;transition:opacity .35s}
.chat.live .chat-body.fade{opacity:0}
.msg.pop{animation:pop .28s ease-out both}
@keyframes pop{from{opacity:0;transform:translateY(8px) scale(.96)}to{opacity:1;transform:none}}
.msg.typing{display:flex;gap:5px;align-items:center;padding:12px 14px}
.msg.typing span{width:7px;height:7px;border-radius:50%;background:#8da0bd;animation:tdot 1.1s infinite}
.msg.typing span:nth-child(2){animation-delay:.18s}.msg.typing span:nth-child(3){animation-delay:.36s}
@keyframes tdot{0%,60%,100%{transform:translateY(0);opacity:.4}30%{transform:translateY(-5px);opacity:1}}
.chat-input{display:flex;align-items:center;gap:8px;margin:0 12px 10px;padding:9px 12px;border-radius:20px;background:#162036;border:1px solid #ffffff1a;min-height:40px;font-size:13px;color:#e8edf6}
.chat-input .typed{white-space:pre-wrap;word-break:break-word}
.chat-input .caret{width:2px;height:15px;background:var(--lime);animation:blink 1s steps(1) infinite;flex:none}
@keyframes blink{50%{opacity:0}}
.chat-input .send{margin-left:auto;color:#fff;background:linear-gradient(135deg,#2a6df4,#7b4dff);width:28px;height:28px;border-radius:50%;display:grid;place-items:center;font-size:12px;flex:none}
.chat-cta{margin-top:var(--f2);justify-self:center}
.tutor-pic{align-content:center;gap:0}
@media(prefers-reduced-motion:reduce){.msg.pop,.chat-input .caret,.chat-head .dot,.msg.typing span{animation:none}}
.chat.live .chat-body{height:370px}
.chat.live .chat-body{scroll-behavior:smooth}
/* Предметы и формулы */
.chat-subj{display:flex;gap:6px;justify-content:center;flex-wrap:wrap;padding:2px 12px 8px;background:#0b1220}
.chat-subj span{font-size:10.5px;letter-spacing:.04em;padding:4px 9px;border-radius:999px;border:1px solid #ffffff22;color:#8da0bd;transition:.3s}
.chat-subj span.on{color:#0a0d12;background:var(--lime);border-color:var(--lime);font-weight:700}
.msg .fx{margin:6px 0 2px;padding:6px 8px;border-radius:10px;background:#0b1220;border:1px solid #ffffff14;overflow-x:auto;text-align:center;font-size:1.02em}
.msg .fx.pop{animation:pop .4s ease-out both}
.msg .fx .katex{color:#fff}
.msg .fx .katex-display{margin:.15em 0}
.msg.me .fx{background:#1d4fd0}
.chat.live .chat-body{height:390px}
.msg .fx{font-size:.92em}
.tutor-principle{margin:var(--f2) 0 0;padding:10px 14px;border-left:3px solid var(--lime);background:#ffffff0f;border-radius:0 12px 12px 0;font-size:14px;color:#e8edf6;max-width:560px}
.tutor-principle b{color:var(--lime)}
.chat-foot{font-size:10.5px}