/* ==========================================================================
   DA 2K — Digital Agency | 2K
   Тёмная сцена, покадровый скролл главами, геометрический гротеск.
   ========================================================================== */

/* ---------- Шрифты (self-hosted, кириллица + латиница) ---------- */
@font-face{font-family:'Jost';font-style:normal;font-weight:200;font-display:swap;
  src:url('../fonts/jost-cyrillic-200-normal.woff2') format('woff2');
  unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116;}
@font-face{font-family:'Jost';font-style:normal;font-weight:200;font-display:swap;
  src:url('../fonts/jost-latin-200-normal.woff2') format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+2000-206F,U+2122,U+2212;}
@font-face{font-family:'Jost';font-style:normal;font-weight:300;font-display:swap;
  src:url('../fonts/jost-cyrillic-300-normal.woff2') format('woff2');
  unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116;}
@font-face{font-family:'Jost';font-style:normal;font-weight:300;font-display:swap;
  src:url('../fonts/jost-latin-300-normal.woff2') format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+2000-206F,U+2122,U+2212;}
@font-face{font-family:'Jost';font-style:normal;font-weight:400;font-display:swap;
  src:url('../fonts/jost-cyrillic-400-normal.woff2') format('woff2');
  unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116;}
@font-face{font-family:'Jost';font-style:normal;font-weight:400;font-display:swap;
  src:url('../fonts/jost-latin-400-normal.woff2') format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+2000-206F,U+2122,U+2212;}
@font-face{font-family:'Jost';font-style:normal;font-weight:500;font-display:swap;
  src:url('../fonts/jost-cyrillic-500-normal.woff2') format('woff2');
  unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116;}
@font-face{font-family:'Jost';font-style:normal;font-weight:500;font-display:swap;
  src:url('../fonts/jost-latin-500-normal.woff2') format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+2000-206F,U+2122,U+2212;}

/* ---------- Токены ---------- */
:root{
  --bg:#04060c;
  --ink:#e9eef7;
  --ink-dim:#93a5bd;
  --ink-faint:#5a6c85;
  --accent:#4d8dff;
  --accent-soft:#7fbcff;
  --line:rgba(255,255,255,.10);
  --line-soft:rgba(255,255,255,.055);

  --font:'Jost','Century Gothic','Futura',system-ui,-apple-system,'Segoe UI',sans-serif;

  --wrap:1340px;
  --gut:clamp(20px,5vw,84px);

  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- База ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font);
  font-weight:300;
  font-size:clamp(15px,1.05vw,17px);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.is-locked{overflow:hidden}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
::selection{background:rgba(77,141,255,.3);color:#fff}

/* Живая сцена на весь сайт */
#bg{position:fixed;inset:0;width:100%;height:100%;z-index:0;display:block}
/* Зерно поверх сцены */
.grain{
  position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.04;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}
.page{position:relative;z-index:2}

/* ---------- Главы ---------- */
.chap{
  min-height:100svh;
  display:flex;align-items:center;
  padding-block:clamp(96px,15vh,190px);
  position:relative;
}
.chap--flow{min-height:0;padding-block:clamp(70px,11vh,140px)}
.chap--tall{min-height:135svh}
.chap > .wrap{width:100%}

.wrap{max-width:var(--wrap);margin:0 auto;padding-inline:var(--gut)}

/* элемент, который проявляется и растворяется по скроллу */
.js .fade{opacity:0;will-change:opacity,transform}
@media(prefers-reduced-motion:reduce){
  .js .fade{opacity:1!important;transform:none!important}
  html{scroll-behavior:auto}
}

/* ---------- Типографика ---------- */
h1,h2,h3,h4{font-weight:200;letter-spacing:-.005em;line-height:1.1;margin:0;text-wrap:balance}
.h-hero{
  font-size:clamp(30px,5.4vw,74px);text-transform:uppercase;
  letter-spacing:.22em;font-weight:200;line-height:1.2;
}
.h-1{font-size:clamp(30px,4.6vw,62px);text-transform:uppercase;letter-spacing:.01em}
.h-2{font-size:clamp(25px,3.3vw,44px)}
.h-3{font-size:clamp(19px,2vw,27px);font-weight:300;letter-spacing:0}
.lede{font-size:clamp(17px,1.55vw,23px);line-height:1.62;color:var(--ink-dim);font-weight:200;max-width:52ch}
.muted{color:var(--ink-dim)}
.faint{color:var(--ink-faint)}
p{margin:0 0 1.15em}
p:last-child{margin-bottom:0}

.eyebrow{
  font-size:11px;font-weight:400;letter-spacing:.26em;text-transform:uppercase;
  color:var(--ink-faint);margin:0 0 30px;display:flex;align-items:center;gap:14px;
}
.eyebrow::before{content:'';width:30px;height:1px;background:var(--accent);opacity:.75;flex:none}

/* Большое многострочное утверждение — строки гаснут вглубь */
.stmt{font-size:clamp(28px,5vw,72px);text-transform:uppercase;font-weight:200;line-height:1.16;letter-spacing:.005em}
.stmt span{display:block}
.stmt .l1{color:#eef3fb}
.stmt .l2{color:#b9c8dd}
.stmt .l3{color:#93a5bd}
.stmt .l4{color:#74879f}
.stmt .l5{color:#5a6c85}

.cols{display:grid;gap:clamp(30px,4.5vw,76px)}
@media(min-width:900px){
  .cols--2{grid-template-columns:1fr 1fr}
  .cols--side{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr)}
  .cols--3{grid-template-columns:repeat(3,1fr)}
}

/* ---------- Кнопки и ссылки ---------- */
.arrow-link{
  display:inline-flex;align-items:center;gap:16px;
  font-size:12px;letter-spacing:.2em;text-transform:uppercase;font-weight:400;
  color:var(--ink);transition:color .35s var(--ease);
}
.circle{
  width:46px;height:46px;border:1px solid var(--line);border-radius:50%;
  display:grid;place-items:center;flex:none;
  transition:border-color .4s var(--ease),background .4s var(--ease),transform .4s var(--ease);
}
.circle svg{width:14px;height:14px;transition:transform .4s var(--ease)}
.arrow-link:hover{color:var(--accent-soft)}
.arrow-link:hover .circle{border-color:var(--accent);background:rgba(77,141,255,.12)}
.arrow-link:hover .circle svg{transform:translateX(3px)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:12px;
  padding:18px 38px;border:1px solid var(--line);border-radius:100px;
  font-size:12px;letter-spacing:.2em;text-transform:uppercase;font-weight:400;
  transition:border-color .4s var(--ease),background .4s var(--ease),color .4s var(--ease);
}
.btn:hover{border-color:var(--accent);background:rgba(77,141,255,.12);color:var(--accent-soft)}
.btn--solid{background:var(--accent);border-color:var(--accent);color:#04070f;font-weight:500}
.btn--solid:hover{background:var(--accent-soft);border-color:var(--accent-soft);color:#04070f}

/* ---------- Шапка ---------- */
.hdr{
  position:fixed;top:0;left:0;right:0;z-index:60;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:26px var(--gut);
  transition:background .5s var(--ease),padding .5s var(--ease),border-color .5s var(--ease);
  border-bottom:1px solid transparent;
}
.hdr.is-stuck{
  background:rgba(4,6,12,.72);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  padding-block:15px;border-bottom-color:var(--line-soft);
}
.brand{display:flex;align-items:center;gap:14px;flex:none}
.brand__mark{width:30px;height:30px;flex:none}
.brand__txt{font-size:13px;letter-spacing:.3em;text-transform:uppercase;font-weight:400;white-space:nowrap}
.brand__txt b{font-weight:500;color:var(--accent-soft)}

.nav{display:none;gap:clamp(16px,2.1vw,32px);align-items:center}
@media(min-width:1080px){.nav{display:flex}}
.nav a{
  font-size:11.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-faint);
  padding:6px 0;position:relative;transition:color .35s var(--ease);
}
.nav a::after{content:'';position:absolute;left:0;bottom:0;height:1px;width:0;background:var(--accent);transition:width .4s var(--ease)}
.nav a:hover,.nav a.is-active{color:var(--ink)}
.nav a.is-active::after{width:100%}

.hdr__right{display:flex;align-items:center;gap:20px;flex:none}
.hdr__tel{display:none;font-size:12px;letter-spacing:.1em;color:var(--ink-dim);transition:color .3s var(--ease)}
.hdr__tel:hover{color:var(--ink)}
@media(min-width:760px){.hdr__tel{display:block}}
@media(max-width:1079px){.hdr__right .btn{display:none}}
@media(max-width:479px){
  .brand__txt{font-size:10.5px;letter-spacing:.2em}
  .brand__mark{width:26px;height:26px}
  .hdr{padding-inline:18px}
}

.burger{width:44px;height:44px;display:grid;place-items:center;border:1px solid var(--line);border-radius:50%}
@media(min-width:1080px){.burger{display:none}}
.burger span{display:block;width:16px;height:1px;background:var(--ink);position:relative;transition:background .3s}
.burger span::before,.burger span::after{
  content:'';position:absolute;left:0;width:16px;height:1px;background:var(--ink);transition:transform .4s var(--ease);
}
.burger span::before{top:-5px}
.burger span::after{top:5px}
.burger.is-open span{background:transparent}
.burger.is-open span::before{transform:translateY(5px) rotate(45deg)}
.burger.is-open span::after{transform:translateY(-5px) rotate(-45deg)}

.mnav{
  position:fixed;inset:0;z-index:55;background:rgba(4,6,12,.97);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  display:flex;flex-direction:column;justify-content:center;gap:4px;
  padding:110px var(--gut) 48px;
  opacity:0;visibility:hidden;transition:opacity .45s var(--ease),visibility .45s;
  overflow-y:auto;
}
.mnav.is-open{opacity:1;visibility:visible}
.mnav a{
  font-size:clamp(21px,5.2vw,32px);font-weight:200;text-transform:uppercase;letter-spacing:.03em;
  padding:11px 0;border-bottom:1px solid var(--line-soft);color:var(--ink-dim);
  transition:color .3s var(--ease),padding-left .35s var(--ease);
}
.mnav a:hover,.mnav a.is-active{color:var(--ink);padding-left:10px}
.mnav__foot{margin-top:34px;font-size:13px;color:var(--ink-faint);display:grid;gap:8px}
.mnav__foot a{font-size:15px;border:0;padding:0;letter-spacing:.04em;text-transform:none}

/* ---------- Навигация по главам ---------- */
.chapnav{
  position:fixed;right:clamp(16px,2vw,32px);top:50%;transform:translateY(-50%);
  z-index:50;display:none;flex-direction:column;gap:15px;align-items:flex-end;
}
@media(min-width:1180px){.chapnav{display:flex}}
.chapnav a{display:flex;align-items:center;gap:12px;color:var(--ink-faint);transition:color .4s var(--ease)}
.chapnav span{
  font-size:10px;letter-spacing:.18em;text-transform:uppercase;white-space:nowrap;
  opacity:0;transform:translateX(8px);transition:opacity .4s var(--ease),transform .4s var(--ease);
}
.chapnav i{display:block;width:16px;height:1px;background:currentColor;transition:width .45s var(--ease),background .45s var(--ease)}
.chapnav a:hover{color:var(--ink-dim)}
.chapnav a:hover span{opacity:1;transform:none}
.chapnav a.is-on{color:var(--accent-soft)}
.chapnav a.is-on span{opacity:1;transform:none}
.chapnav a.is-on i{width:36px;background:var(--accent)}

/* ---------- Первый экран ---------- */
.hero__mark{display:flex;align-items:center;gap:clamp(18px,3vw,40px);margin-bottom:38px}
.hero__mark svg{width:clamp(42px,5vw,66px);height:auto;flex:none}
.hero__rule{width:1px;height:clamp(42px,5vw,64px);background:var(--line);flex:none}
.hero__sub{max-width:44ch;color:var(--ink-dim);font-size:clamp(15px,1.3vw,19px);font-weight:200;margin:0 0 42px}
.hero__cta{display:flex;flex-wrap:wrap;gap:16px}
.scroll-hint{
  position:absolute;left:var(--gut);bottom:38px;z-index:3;
  font-size:10.5px;letter-spacing:.26em;text-transform:uppercase;color:var(--ink-faint);
  display:flex;align-items:center;gap:12px;
}
.scroll-hint i{display:block;width:46px;height:1px;background:rgba(255,255,255,.18);position:relative;overflow:hidden}
.scroll-hint i::after{content:'';position:absolute;inset:0;background:var(--accent);transform:translateX(-100%);animation:swipe 2.6s var(--ease) infinite}
@keyframes swipe{0%{transform:translateX(-100%)}55%{transform:translateX(0)}100%{transform:translateX(100%)}}
@media(prefers-reduced-motion:reduce){.scroll-hint i::after{animation:none;transform:none;opacity:.6}}

/* ---------- Обрезанный абзац с раскрытием ---------- */
.clamp{
  display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden;
  color:var(--ink-dim);
}
[data-clamp].is-open .clamp{display:block;-webkit-line-clamp:unset;overflow:visible}
.clamp__btn{
  margin-top:26px;width:46px;height:46px;border:1px solid var(--line);border-radius:50%;
  display:grid;place-items:center;transition:border-color .4s,background .4s;
}
.clamp__btn svg{width:13px;height:13px;transition:transform .45s var(--ease)}
.clamp__btn:hover{border-color:var(--accent);background:rgba(77,141,255,.12)}
[data-clamp].is-open .clamp__btn svg{transform:rotate(180deg)}

/* ---------- Нумерованные направления ---------- */
.dirs{border-top:1px solid var(--line-soft)}
.dir{
  display:block;border-bottom:1px solid var(--line-soft);
  padding:clamp(24px,3.1vw,40px) 0;position:relative;
  transition:background .5s var(--ease),padding-left .5s var(--ease);
}
.dir:hover{background:linear-gradient(90deg,rgba(77,141,255,.07),transparent 70%);padding-left:clamp(10px,1.5vw,24px)}
.dir__row{display:grid;gap:16px;align-items:start}
@media(min-width:900px){.dir__row{grid-template-columns:62px minmax(0,1fr) minmax(0,1.05fr) 58px;gap:clamp(18px,2.6vw,44px);align-items:center}}
.dir__num{font-size:12px;letter-spacing:.2em;color:var(--accent);font-weight:400}
.dir__name{font-size:clamp(22px,2.8vw,36px);font-weight:200;line-height:1.15}
.dir__txt{color:var(--ink-dim);font-size:15px;margin:0}
.dir__go{width:46px;height:46px;border:1px solid var(--line);border-radius:50%;display:none;place-items:center;transition:border-color .4s,background .4s,transform .4s}
@media(min-width:900px){.dir__go{display:grid}}
.dir:hover .dir__go{border-color:var(--accent);background:rgba(77,141,255,.12);transform:translateX(4px)}
.dir__tags{margin-top:12px;display:flex;flex-wrap:wrap;gap:8px}
.tag{font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-faint);border:1px solid var(--line-soft);border-radius:100px;padding:5px 12px}

/* ---------- Цифры ---------- */
.stats{display:grid;gap:clamp(26px,3.6vw,52px);grid-template-columns:repeat(2,1fr)}
@media(min-width:820px){.stats{grid-template-columns:repeat(4,1fr)}}
.stat__n{font-size:clamp(36px,5.2vw,70px);font-weight:200;line-height:1;letter-spacing:-.02em}
.stat__n small{font-size:.44em;color:var(--accent);margin-left:2px;font-weight:300}
.stat__l{margin-top:12px;font-size:12.5px;letter-spacing:.13em;text-transform:uppercase;color:var(--ink-faint);line-height:1.5}

/* ---------- Кейсы ---------- */
.cases{display:grid;gap:1px;background:var(--line-soft);border-block:1px solid var(--line-soft)}
@media(min-width:760px){.cases{grid-template-columns:1fr 1fr}}
@media(min-width:1200px){.cases--3{grid-template-columns:repeat(3,1fr)}}
.case{
  background:rgba(6,10,20,.72);backdrop-filter:blur(3px);
  padding:clamp(26px,3.2vw,44px);display:flex;flex-direction:column;gap:16px;
  min-height:290px;position:relative;overflow:hidden;transition:background .5s var(--ease);
}
.case::after{
  content:'';position:absolute;inset:0;opacity:0;pointer-events:none;
  background:radial-gradient(60% 60% at 80% 0%,rgba(77,141,255,.18),transparent 70%);
  transition:opacity .6s var(--ease);
}
.case:hover{background:rgba(11,19,34,.85)}
.case:hover::after{opacity:1}
.case__top{display:flex;justify-content:space-between;align-items:baseline;gap:16px;position:relative;z-index:1}
.case__cat{font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--accent)}
.case__year{font-size:11px;color:var(--ink-faint);letter-spacing:.1em}
.case__name{font-size:clamp(21px,2.3vw,31px);font-weight:200;position:relative;z-index:1}
.case__txt{color:var(--ink-dim);font-size:14.5px;margin:0;position:relative;z-index:1}
.case__res{margin-top:auto;padding-top:20px;border-top:1px solid var(--line-soft);position:relative;z-index:1;font-size:12.5px;color:var(--ink)}
.case__res b{color:var(--accent-soft);font-weight:400}

/* ---------- Логотипы ---------- */
.logos{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line-soft);border:1px solid var(--line-soft)}
@media(min-width:680px){.logos{grid-template-columns:repeat(5,1fr)}}
.logo{
  background:rgba(6,10,20,.7);display:grid;place-items:center;padding:34px 18px;min-height:116px;
  font-size:13px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-faint);text-align:center;
  transition:color .45s var(--ease),background .45s var(--ease);
}
.logo:hover{color:var(--ink);background:rgba(11,19,34,.85)}

/* ---------- Процесс ---------- */
.steps{counter-reset:s;display:grid;gap:1px;background:var(--line-soft);border-block:1px solid var(--line-soft)}
@media(min-width:880px){.steps{grid-template-columns:repeat(4,1fr)}}
.step{background:rgba(6,10,20,.7);padding:clamp(26px,3vw,40px);counter-increment:s}
.step::before{content:'0' counter(s);display:block;font-size:12px;letter-spacing:.2em;color:var(--accent);margin-bottom:22px}
.step h3{font-size:19px;font-weight:300;margin-bottom:12px}
.step p{color:var(--ink-dim);font-size:14.5px;margin:0}

/* ---------- Аккордеон ---------- */
.acc{border-top:1px solid var(--line-soft)}
.acc__item{border-bottom:1px solid var(--line-soft)}
.acc__btn{
  width:100%;text-align:left;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:25px 0;font-size:clamp(17px,1.75vw,22px);font-weight:300;line-height:1.35;
  transition:color .35s var(--ease);
}
.acc__btn:hover{color:var(--accent-soft)}
.acc__ico{width:34px;height:34px;border:1px solid var(--line);border-radius:50%;display:grid;place-items:center;flex:none;position:relative;transition:border-color .4s}
.acc__ico::before,.acc__ico::after{content:'';position:absolute;background:var(--ink);transition:transform .4s var(--ease),background .4s}
.acc__ico::before{width:11px;height:1px}
.acc__ico::after{width:1px;height:11px}
.acc__item.is-open .acc__ico{border-color:var(--accent)}
.acc__item.is-open .acc__ico::after{transform:scaleY(0)}
.acc__item.is-open .acc__ico::before{background:var(--accent)}
.acc__body{overflow:hidden;height:0;transition:height .45s var(--ease)}
.acc__inner{padding:0 0 28px;color:var(--ink-dim);max-width:74ch}

/* ---------- Плейсхолдер ---------- */
.ph{color:#ffcf6b;border-bottom:1px dashed rgba(255,207,107,.5);font-style:normal;white-space:nowrap}

/* ---------- Форма ---------- */
.form{display:grid;gap:26px;max-width:620px}
.field{position:relative}
.field input,.field textarea{
  width:100%;background:transparent;border:0;border-bottom:1px solid var(--line);
  color:var(--ink);font:inherit;font-size:16px;padding:14px 0;outline:none;
  transition:border-color .4s var(--ease);
}
.field textarea{resize:vertical;min-height:110px}
.field input:focus,.field textarea:focus{border-bottom-color:var(--accent)}
.field label{
  position:absolute;left:0;top:14px;color:var(--ink-faint);font-size:16px;pointer-events:none;
  transition:transform .35s var(--ease),font-size .35s var(--ease),color .35s var(--ease);transform-origin:left top;
}
.field input:focus + label,.field input:not(:placeholder-shown) + label,
.field textarea:focus + label,.field textarea:not(:placeholder-shown) + label{
  transform:translateY(-22px);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent);
}
.form__note{font-size:12.5px;color:var(--ink-faint);line-height:1.6}
.form__note a{border-bottom:1px solid var(--line);transition:color .3s,border-color .3s}
.form__note a:hover{color:var(--accent-soft);border-color:var(--accent)}
.form__msg{font-size:14px;padding:14px 18px;border-radius:6px;display:none}
.form__msg.ok{display:block;background:rgba(77,255,141,.09);border:1px solid rgba(77,255,141,.28);color:#8fe9b0}
.form__msg.err{display:block;background:rgba(255,90,90,.09);border:1px solid rgba(255,90,90,.28);color:#ff9d9d}
.hp{position:absolute!important;left:-9999px!important;width:1px;height:1px;overflow:hidden}

/* ---------- Контакты ---------- */
.contact-grid{display:grid;gap:clamp(28px,4vw,56px)}
@media(min-width:900px){.contact-grid{grid-template-columns:1.1fr .9fr}}
.cblock{border-top:1px solid var(--line-soft);padding-top:22px;margin-bottom:32px}
.cblock__l{font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-faint);margin-bottom:12px}
.cblock__v{font-size:clamp(18px,1.9vw,24px);font-weight:200;line-height:1.5}
.cblock__v a{transition:color .3s}
.cblock__v a:hover{color:var(--accent-soft)}

/* ---------- Подвал ---------- */
.ftr{
  border-top:1px solid var(--line-soft);padding-block:clamp(48px,7vh,80px) 34px;font-size:14px;
  background:linear-gradient(180deg,rgba(4,6,12,.4),rgba(2,4,9,.9));
}
.ftr__top{display:grid;gap:clamp(30px,4vw,60px);margin-bottom:54px}
@media(min-width:820px){.ftr__top{grid-template-columns:1.4fr 1fr 1fr 1.2fr}}
.ftr h4{font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-faint);margin-bottom:20px;font-weight:400}
.ftr ul{list-style:none;margin:0;padding:0;display:grid;gap:11px}
.ftr li a{color:var(--ink-dim);transition:color .3s}
.ftr li a:hover{color:var(--ink)}
.ftr__bot{
  display:flex;flex-wrap:wrap;gap:14px 30px;justify-content:space-between;align-items:center;
  padding-top:26px;border-top:1px solid var(--line-soft);font-size:12px;color:var(--ink-faint);
}
.ftr__bot a:hover{color:var(--ink-dim)}

/* ---------- Кнопка «наверх» ---------- */
.top{
  position:fixed;left:clamp(16px,2vw,32px);bottom:34px;z-index:50;
  width:48px;height:48px;border:1px solid var(--line);border-radius:50%;
  background:rgba(4,6,12,.6);backdrop-filter:blur(8px);
  display:grid;place-items:center;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .45s var(--ease),visibility .45s,transform .45s var(--ease),border-color .4s,background .4s;
}
.top.is-on{opacity:1;visibility:visible;transform:none}
.top:hover{border-color:var(--accent);background:rgba(77,141,255,.14)}