/* cBrain. Тёмный мир — основной и выбран сознательно: рой светится только на
   тёмном. Светлый режим включается кнопкой в шапке и хранит выбор посетителя. */

@font-face{font-family:"Unbounded";font-style:normal;font-display:swap;font-weight:200 900;src:url(fonts/unbounded-cyrillic-wght-normal.woff2) format("woff2");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:"Unbounded";font-style:normal;font-display:swap;font-weight:200 900;src:url(fonts/unbounded-latin-wght-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Onest";font-style:normal;font-display:swap;font-weight:100 900;src:url(fonts/onest-cyrillic-wght-normal.woff2) format("woff2");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:"Onest";font-style:normal;font-display:swap;font-weight:100 900;src:url(fonts/onest-latin-wght-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"JetBrains Mono";font-style:normal;font-display:swap;font-weight:100 800;src:url(fonts/jetbrains-mono-cyrillic-wght-normal.woff2) format("woff2");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}
@font-face{font-family:"JetBrains Mono";font-style:normal;font-display:swap;font-weight:100 800;src:url(fonts/jetbrains-mono-latin-wght-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}

:root{
  --void:#05060B; --ink:#EEF0F7; --mist:#9AA1B6; --faint:#7A8196;
  --line:rgba(238,240,247,.12); --line-strong:rgba(238,240,247,.26);
  --ember:#FF6A2B; --ember-text:#FF7A42; --signal:#3D7BFF; --plasma:#9FD0FF;
  --ok:#3DDC97; --warn:#F5C542;
  --glass:rgba(8,10,19,.66); --glass-hover:rgba(14,17,30,.82); --tag-bg:rgba(8,10,19,.72);
  --on-ember:#05060B;
  --display:"Unbounded","Arial Black",system-ui,sans-serif;
  --body:"Onest","Segoe UI",system-ui,-apple-system,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  /* Две кривые: выход — для реакции на действие, вход-выход — для зацикленного. */
  --ease-out:cubic-bezier(.16,1,.3,1);
  --ease-io:cubic-bezier(.65,0,.35,1);
  --pad:clamp(1.25rem,4vw,3rem);
  color-scheme:dark;
}
:root[data-mode="light"]{
  --void:#ECEEF4; --ink:#0B0E1A; --mist:#454D62; --faint:#5A6277;
  --line:rgba(11,14,26,.14); --line-strong:rgba(11,14,26,.3);
  --ember:#C2410C; --ember-text:#A93A0A; /* белый на #E0521A давал 3.9:1 — ниже порога для кнопок */ --signal:#2346D9; --plasma:#1D2F7A;
  --ok:#0E8A55; --warn:#9A6A00;
  --glass:rgba(236,238,244,.78); --glass-hover:rgba(246,247,251,.92); --tag-bg:rgba(246,247,251,.86);
  --on-ember:#FFFFFF;
  color-scheme:light;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--void);color:var(--ink);font:400 1.0625rem/1.6 var(--body);-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit}
[hidden]{display:none!important}
:focus-visible{outline:2px solid var(--plasma);outline-offset:3px;border-radius:6px}
.skip{position:fixed;left:1rem;top:-4rem;z-index:50;background:var(--ember);color:var(--on-ember);padding:.6rem 1rem;border-radius:999px;text-decoration:none;font-weight:600}
.skip:focus{top:1rem}

/* ---------- сцена ---------- */
#swarm{position:fixed;inset:0 0 auto;width:100%;height:100lvh;display:block;z-index:0}
.fallback{position:fixed;inset:0;z-index:0;display:none;background:radial-gradient(circle at 50% 44%,transparent 0 27vmin,rgba(255,106,43,.5) 30vmin,rgba(61,123,255,.45) 34vmin,transparent 41vmin)}
.no-gl .fallback,.no-js .fallback{display:block}
.veil{position:fixed;inset:0;z-index:1;pointer-events:none;background:radial-gradient(120% 90% at 50% 45%,transparent 55%,color-mix(in srgb,var(--void) 70%,transparent) 100%)}
.tags{position:fixed;inset:0 0 auto;height:100lvh;z-index:3;pointer-events:none;overflow:hidden}
.tag{position:absolute;left:0;top:0;font:400 .8125rem/1 var(--mono);color:var(--ink);padding:.55rem .85rem;border-radius:999px;border:1px solid var(--line-strong);background:var(--tag-bg);white-space:nowrap;opacity:0;visibility:hidden;will-change:transform,opacity;display:flex;gap:.5rem;align-items:center}
.tag::before{content:"";width:.4rem;height:.4rem;border-radius:50%;background:var(--signal);box-shadow:0 0 8px var(--signal)}
.tag.hot::before{background:var(--ember);box-shadow:0 0 8px var(--ember)}
.tag.big{font:600 1.05rem/1 var(--display);letter-spacing:-.03em;padding:.7rem 1.1rem;border-color:transparent;background:transparent;text-shadow:0 0 18px var(--void)}
.tag.big::before{display:none}
.tag.on{visibility:visible}

/* ---------- шапка ---------- */
.top{position:fixed;inset:0 0 auto;z-index:20;display:flex;align-items:center;gap:1.5rem;padding:1rem var(--pad);border-bottom:1px solid transparent;transition:background-color .4s var(--ease-out),border-color .4s var(--ease-out)}
.top.scrolled{background:color-mix(in srgb,var(--void) 72%,transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-color:var(--line)}
.logo{display:flex;align-items:baseline;gap:.1rem;font:800 1.35rem/1 var(--display);letter-spacing:-.04em;text-decoration:none;margin-right:auto}
.logo b{font-weight:400;color:var(--mist)}
.logo i{width:.42rem;height:.42rem;border-radius:50%;background:var(--ember);box-shadow:0 0 14px var(--ember);margin-left:.25rem;align-self:center}
.nav{display:flex;gap:1.75rem;font-size:.9375rem}
.nav a{text-decoration:none;color:var(--mist);transition:color .2s}
.nav a:hover{color:var(--ink)}
.icon-btn{appearance:none;border:1px solid var(--line-strong);background:transparent;color:var(--ink);width:2.75rem;height:2.75rem;border-radius:50%;display:grid;place-items:center;cursor:pointer;transition:border-color .2s}
.icon-btn:hover{border-color:var(--ink)}
.icon-btn svg{width:1.1rem;height:1.1rem}
.menu-btn{display:none}
.btn{display:inline-flex;align-items:center;gap:.6rem;font:600 .9375rem/1 var(--body);text-decoration:none;border-radius:999px;padding:.95rem 1.4rem;border:1px solid transparent;white-space:nowrap;cursor:pointer;transition:transform .25s var(--ease-out),background-color .25s,border-color .25s}
.btn svg{width:1rem;height:1rem;transition:transform .25s var(--ease-out)}
.btn:hover svg{transform:translate(2px,-2px)}
.btn:active{transform:scale(.97)}
.btn-ember{background:var(--ember);color:var(--on-ember)}
.btn-ember:hover{background:color-mix(in srgb,var(--ember) 86%,var(--ink))}
.btn-line{border-color:var(--line-strong);color:var(--ink);background:color-mix(in srgb,var(--void) 30%,transparent)}
.btn-line:hover{border-color:var(--ink)}
.top .btn{padding:.75rem 1.1rem}

/* ---------- общие ---------- */
main{position:relative;z-index:2}
.wrap{max-width:1320px;margin-inline:auto;padding-inline:var(--pad)}
.section{padding-block:clamp(3rem,8vh,5rem)}
/* Пауза между разделами: здесь зритель прокручивает только анимацию роя и ярлыки. */
.interlude{height:190vh}
/* inline-block, а не flex: во flex текст и <b> становились отдельными колонками
   и на узком экране подпись разваливалась. */
.path{font:400 .8125rem/1.5 var(--mono);color:var(--plasma);display:inline-block;margin:0;text-wrap:balance}
.path::before{content:"";display:inline-block;width:.5rem;height:.5rem;border:1px solid currentColor;transform:rotate(45deg);margin-right:.6rem;vertical-align:.05em}
.path b{font-weight:600;color:var(--ember-text)}
h1,h2,h3{margin:0;text-wrap:balance}
h2{font:800 clamp(2.1rem,4.6vw,4.4rem)/.98 var(--display);letter-spacing:-.045em;margin-block:1.25rem 1.25rem}
.lede{text-wrap:pretty;max-width:40ch;color:var(--mist);font-size:clamp(1.0625rem,1.3vw,1.25rem);line-height:1.55;margin:0}
.head{display:grid;grid-template-columns:repeat(12,1fr);gap:1.5rem;margin-bottom:clamp(2.5rem,6vh,4rem)}
.head>div{grid-column:1/span 7}
.head.right>div{grid-column:6/span 7}
.shadowed{text-shadow:0 0 28px var(--void),0 0 2px var(--void)}
.chip{font:400 .75rem/1 var(--mono);color:var(--mist);border:1px solid var(--line);border-radius:999px;padding:.4rem .6rem;white-space:nowrap}
.chips{display:flex;flex-wrap:wrap;gap:.4rem}
.glass{background:var(--glass);backdrop-filter:blur(12px) saturate(1.2);-webkit-backdrop-filter:blur(12px) saturate(1.2);border:1px solid var(--line)}
.actions{display:flex;gap:.75rem;justify-content:center;flex-wrap:wrap}
.status{font:400 .75rem/1 var(--mono);display:inline-flex;align-items:center;gap:.45rem;color:var(--ink)}
.status::before{content:"";width:.45rem;height:.45rem;border-radius:50%;background:var(--st,var(--ok));box-shadow:0 0 8px var(--st,var(--ok))}
.status.demo{--st:var(--warn)}
.status.closed{--st:var(--mist)}

/* ---------- первый экран ---------- */
.hero{min-height:100svh;display:grid;grid-template-rows:1fr auto}
.hero-core{display:grid;place-items:center;text-align:center;padding:6rem var(--pad) 2.5rem}
.hero .path{margin-bottom:1.6rem}
h1{font:800 clamp(2.5rem,6.6vw,6.6rem)/.92 var(--display);letter-spacing:-.055em}
h1 span{display:block}
h1 em{font-style:normal;color:var(--ember)}
.hero-sub{max-width:36ch;margin:1.8rem auto 2.2rem;color:var(--mist);font-size:clamp(1rem,1.25vw,1.1875rem)}
.ticker{border-block:1px solid var(--line);overflow:hidden;font:400 .8125rem/1 var(--mono);color:var(--mist);background:color-mix(in srgb,var(--void) 40%,transparent)}
.ticker-track{display:flex;gap:2.5rem;width:max-content;padding:1rem 0;animation:tick 48s linear infinite}
.ticker-track span{display:flex;gap:2.5rem;align-items:center}
.ticker-track span::after{content:"";width:.3rem;height:.3rem;background:var(--ember);border-radius:50%}
@keyframes tick{to{transform:translateX(-50%)}}

/* ---------- слои ---------- */
.layers{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.layer{padding:1.75rem;border-radius:18px;display:grid;gap:.85rem;align-content:start}
.layer-top{font:400 .75rem/1 var(--mono);color:var(--faint)}
.layer h3{font:600 1.5rem/1.1 var(--display);letter-spacing:-.03em}
.layer p{margin:0;color:var(--mist);font-size:.975rem}
.facts{display:grid;grid-template-columns:repeat(4,1fr);margin-top:3rem;border-top:1px solid var(--line)}
.fact{padding:1.5rem 1.25rem 0 0}
.fact strong{display:block;font:800 clamp(2.2rem,4vw,3.6rem)/1 var(--display);letter-spacing:-.05em;font-variant-numeric:tabular-nums}
.fact span{display:block;color:var(--mist);font-size:.9375rem;margin-top:.5rem}

/* ---------- внедрения ---------- */
.docs{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.doc{border-radius:6px;padding:1.4rem 1.4rem 1.5rem;display:grid;grid-template-rows:auto auto 1fr;gap:.85rem;transition:background-color .3s,border-color .3s}
.doc:hover{background:var(--glass-hover);border-color:var(--line-strong)}
.doc-meta{display:flex;justify-content:space-between;gap:1rem;font:400 .75rem/1.3 var(--mono);color:var(--faint);padding-bottom:.85rem;border-bottom:1px dashed var(--line)}
.doc-meta b{color:var(--plasma);font-weight:400;text-align:right}
.doc h3{font:600 1.25rem/1.2 var(--body)}
.doc ul{margin:0;padding:0;list-style:none;display:grid;gap:.4rem;color:var(--mist);font-size:.9375rem;line-height:1.45}
.doc li{display:grid;grid-template-columns:.9rem 1fr}
.doc li::before{content:"—";color:var(--faint)}

/* ---------- продукты ---------- */
.prods{border-top:1px solid var(--line)}
.prod{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.5fr) minmax(0,.8fr) 2.75rem;gap:2rem;align-items:center;padding:1.6rem 1.25rem;border-bottom:1px solid var(--line);text-decoration:none;transition:background-color .3s var(--ease-out)}
a.prod:hover{background:var(--glass)}
.prod-name{font:600 clamp(1.4rem,2.2vw,2rem)/1.05 var(--display);letter-spacing:-.04em;transition:transform .4s var(--ease-out)}
a.prod:hover .prod-name{transform:translateX(.4rem)}
.prod-desc{color:var(--mist);font-size:.975rem;line-height:1.5}
.prod-meta{display:grid;gap:.45rem;justify-items:start}
.stack{font:400 .75rem/1 var(--mono);color:var(--faint)}
.arrow{width:2.75rem;height:2.75rem;border-radius:50%;border:1px solid var(--line-strong);display:grid;place-items:center;transition:background-color .3s,border-color .3s,transform .4s var(--ease-out)}
.arrow svg{width:1rem;height:1rem}
.prod.static .arrow{visibility:hidden}
a.prod:hover .arrow{background:var(--ember);border-color:var(--ember);color:var(--on-ember);transform:rotate(45deg)}

/* ---------- ИИ ---------- */
.ais{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem;perspective:1400px}
.ai{border-radius:22px;padding:clamp(1.5rem,2.6vw,2.25rem);display:grid;gap:1rem;align-content:start}
.ai.settle{transition:transform .7s var(--ease-out)}
.ai-main{display:grid;gap:1rem;align-content:start}
.ai-top{display:flex;justify-content:space-between;align-items:center;gap:1rem}
.ai-role{font:400 .75rem/1 var(--mono);color:var(--faint);text-align:right}
.ai h3{font:800 clamp(1.7rem,3vw,2.6rem)/1 var(--display);letter-spacing:-.05em}
.ai p{margin:0;color:var(--mist);max-width:52ch}
.ai.lead{grid-column:1/-1;grid-template-columns:1.2fr 1fr;align-items:center;column-gap:3rem}
.ai.lead h3{font-size:clamp(2.2rem,5vw,4.4rem)}
.ai.wide{grid-column:1/-1}
.stats{display:flex;gap:2rem;flex-wrap:wrap;color:var(--mist);font-size:.9375rem}
.stats strong{display:block;font:800 1.9rem/1.1 var(--display);letter-spacing:-.04em;color:var(--ink);font-variant-numeric:tabular-nums}
.pipe{font:400 .75rem/1.9 var(--mono);color:var(--plasma);overflow-x:auto;white-space:nowrap;padding:.7rem .9rem;border:1px dashed var(--line);border-radius:10px}
.pipe b{color:var(--ember-text);font-weight:600}
.ai-link{justify-self:start;font:600 .9375rem/1 var(--body);text-decoration:none;display:inline-flex;gap:.45rem;align-items:center;border-bottom:1px solid var(--line-strong);padding-block:.5rem .35rem}
.ai-link:hover{border-color:var(--ember)}
.ai-link svg{width:.9rem;height:.9rem}
.agents{display:grid;gap:.6rem}
.agent{display:grid;grid-template-columns:auto 1fr;gap:.9rem;align-items:baseline;padding:.9rem 1rem;border-radius:12px;border:1px solid var(--line);background:color-mix(in srgb,var(--void) 35%,transparent)}
.agent b{font:600 .75rem/1.6 var(--mono);color:var(--ember-text)}
.agent span{color:var(--mist);font-size:.9375rem;line-height:1.45}

/* ---------- открытый код ---------- */
.oss{display:grid;grid-template-columns:repeat(3,1fr);column-gap:2rem}
.repo{display:grid;gap:.5rem;padding:1.5rem 0 1.75rem;border-top:1px solid var(--line);text-decoration:none;align-content:start}
.repo-kind{font:400 .75rem/1.3 var(--mono);color:var(--faint)}
.repo h3{font:600 1.25rem/1.2 var(--body);display:flex;gap:.5rem;align-items:center}
.repo h3 svg{width:.9rem;height:.9rem;flex:none;opacity:0;transform:translate(-4px,4px);transition:opacity .25s,transform .35s var(--ease-out)}
.repo:hover h3 svg,.repo:focus-visible h3 svg{opacity:1;transform:none}
.repo p{margin:0;color:var(--mist);font-size:.9375rem;line-height:1.5}

/* ---------- контакт ---------- */
.contact{min-height:100svh;display:grid;align-content:end;text-align:center;padding-block:44vh clamp(3rem,8vh,5rem)}
.contact h2{font-size:clamp(2.4rem,6.4vw,6.2rem);max-width:14ch;margin-inline:auto}
.contact .lede{margin:0 auto 2.2rem}
.steps{list-style:none;padding:0;margin:clamp(3rem,8vh,5rem) 0 0;display:grid;grid-template-columns:repeat(4,1fr);text-align:left;border-top:1px solid var(--line)}
.steps li{padding:1.1rem 1.5rem 0 0;display:grid;gap:.35rem}
.steps small{font:400 .75rem/1 var(--mono);color:var(--ember-text)}
.steps strong{font:600 1.0625rem/1.3 var(--body)}
/* Справа место под плавающую кнопку паузы, иначе она закрывает последнюю ссылку. */
.foot{position:relative;z-index:2;border-top:1px solid var(--line);padding:1.5rem calc(var(--pad) + 3.5rem) 1.75rem var(--pad);display:flex;flex-wrap:wrap;gap:.75rem 2rem;justify-content:space-between;color:var(--faint);font:400 .8125rem/1.5 var(--mono);background:color-mix(in srgb,var(--void) 82%,transparent)}
.foot a{color:var(--mist);text-decoration:none}
.foot a:hover{color:var(--ink)}

.pause{position:fixed;right:var(--pad);bottom:1rem;z-index:15;width:2.75rem;height:2.75rem;border-radius:50%;display:grid;place-items:center;color:var(--mist);background:color-mix(in srgb,var(--void) 65%,transparent);border:1px solid var(--line);cursor:pointer;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);transition:color .2s,border-color .2s}
.pause:hover{color:var(--ink);border-color:var(--line-strong)}
.pause svg{width:.85rem;height:.85rem}
.pause .i-play,.pause[aria-pressed="true"] .i-pause{display:none}
.pause[aria-pressed="true"] .i-play{display:block}

/* ---------- адаптив ---------- */
@media (max-width:1080px){
  .docs,.oss{grid-template-columns:repeat(2,1fr)}
  .prod{grid-template-columns:minmax(0,1fr) minmax(0,1.3fr) 2.75rem}
  .prod-meta{grid-column:1/2;grid-row:2}
  .ai.lead{grid-template-columns:1fr}
}
@media (max-width:860px){
  .nav{position:fixed;inset:0;z-index:-1;flex-direction:column;justify-content:center;gap:1.4rem;padding:var(--pad);background:var(--void);font:600 1.8rem/1.1 var(--display);letter-spacing:-.03em;opacity:0;visibility:hidden;transition:opacity .35s var(--ease-out),visibility 0s .35s}
  .nav a{color:var(--ink)}
  .nav.open{opacity:1;visibility:visible;transition:opacity .35s var(--ease-out)}
  .menu-btn{display:grid}
  .top .btn{display:none}
  .head>div,.head.right>div{grid-column:1/-1}
  .layers,.ais{grid-template-columns:1fr}
  .facts,.steps{grid-template-columns:repeat(2,1fr)}
  .steps{row-gap:1.25rem}
  .interlude{height:160vh}
  .tag{font-size:.75rem;padding:.45rem .7rem}
  .tag.big{font-size:.95rem}
}
@media (max-width:620px){
  body{font-size:1rem}
  .docs,.oss{grid-template-columns:1fr}
  .prod{grid-template-columns:minmax(0,1fr) 2.75rem;gap:.8rem 1rem;padding:1.4rem .25rem}
  .prod-desc{grid-column:1/-1;grid-row:2}
  .prod-meta{grid-column:1/-1;grid-row:3;display:flex;gap:1rem;flex-wrap:wrap}
  .arrow{grid-column:2;grid-row:1}
  .hero-core{padding-top:5.5rem}
  h1{font-size:clamp(2.2rem,11.5vw,3.4rem)}
  /* «эксперименты» в Unbounded 800 не помещалось в 320 px при 2.1rem */
  h2{font-size:clamp(1.6rem,8.4vw,2.4rem)}
  .glass{backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
  .stats{gap:1.25rem}
  /* На телефоне шаги вытесняли заголовок контакта под звезду; ради воздуха их убираем. */
  .steps{display:none}
  .pause{right:.75rem;bottom:.75rem}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .ticker-track{animation:none}
  .interlude{height:16vh}
  .tags,.pause{display:none}
  .btn,.btn svg,.prod-name,.arrow,.repo h3 svg{transition:none}
}