/* ZERTINA — white edition */
:root{
  --bg:#ffffff;
  --bg-soft:#f7f9fb;
  --bg-mist:#eef3f7;
  --ink:#0f1720;
  --ink-2:#3d4a58;
  --ink-3:#7b8794;
  --line:#e4eaf0;
  --accent:#1b6fb5;
  --accent-soft:#e8f1f9;
  --radius:18px;
  --maxw:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font:400 17px/1.65 "Inter","Helvetica Neue",Arial,sans-serif;
  letter-spacing:-.01em;
  overflow-x:hidden;
}
body.intro-open{overflow:hidden}
img,video{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

h1,h2,h3{margin:0;font-weight:600;letter-spacing:-.03em;line-height:1.1}
h1{font-size:clamp(2.6rem,7vw,5.2rem);font-weight:300}
h2{font-size:clamp(1.9rem,3.6vw,3rem)}
h3{font-size:1.15rem;letter-spacing:-.02em}
p{margin:0}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
.eyebrow{
  font-size:.74rem;font-weight:600;letter-spacing:.18em;
  text-transform:uppercase;color:var(--accent);
}

/* ---------- intro film ---------- */
.intro{
  position:fixed;inset:0;z-index:100;
  display:grid;place-items:center;isolation:isolate;
  background:#e9edf0;color:#fff;
  transition:opacity .7s var(--ease),visibility .7s;
}
.intro[hidden]{display:none}
.intro.is-closing{opacity:0;visibility:hidden;pointer-events:none}
/* Заставка занимает весь экран на любом устройстве. Исходник вертикальный
   (416×752), поэтому на широких экранах кадр кроется с большим увеличением
   и режется по вертикали. Полноценно лечится только перегенерацией в 16:9. */
.intro__stage{
  position:absolute;inset:0;z-index:0;
  background:#e9edf0;
}
.intro__video{
  position:absolute;inset:0;
  width:100%;height:100%;
  object-position:center 34%;
  object-fit:cover;
}
/* Чем шире экран, тем сильнее вертикальная обрезка — поднимаем точку
   кадрирования, чтобы лицо не уходило за верхнюю границу. */
@media (min-aspect-ratio:1/1){
  .intro__video{object-position:center 30%}
}
@media (min-aspect-ratio:16/10){
  .intro__video{object-position:center 26%}
}

/* ---------- вспышка на стыке заставки и сайта ---------- */
.flash{
  position:fixed;inset:0;z-index:120;
  background:#fff;opacity:0;pointer-events:none;
  will-change:opacity;
}
.flash.is-igniting{
  opacity:1;
  transition:opacity .32s cubic-bezier(.4,0,1,1);
}
.flash.is-fading{
  opacity:0;
  transition:opacity .85s var(--ease);
}
/* сайт «проявляется» из вспышки */
body.is-revealing .hero__media img{animation:none;transform:scale(1.07)}
body.is-revealing .hero__media img,
body.is-revealing .hero__inner{transition:transform 1.2s var(--ease),opacity 1.2s var(--ease)}
/* Затемнение было нужно для читаемости подписей — их больше нет,
   оставляем едва заметное, только чтобы иконки не терялись на светлом. */
.intro__veil{
  position:absolute;inset:0;z-index:1;pointer-events:none;
  background:
    radial-gradient(120% 80% at 50% 50%,rgba(9,13,17,0) 55%,rgba(9,13,17,.22) 100%);
}
/* ---------- иконки поверх заставки ---------- */
.intro__icon{
  position:absolute;z-index:3;
  display:grid;place-items:center;
  width:46px;height:46px;padding:0;
  border:1px solid rgba(255,255,255,.35);border-radius:50%;
  background:rgba(18,26,34,.32);backdrop-filter:blur(10px);
  color:#fff;cursor:pointer;
  transition:transform .3s var(--ease),background .3s,border-color .3s,opacity .3s;
}
.intro__icon:hover{transform:scale(1.08);background:rgba(18,26,34,.5);border-color:rgba(255,255,255,.7)}
.intro__icon[hidden]{display:none}
.intro__unmute{right:24px;bottom:24px}
.intro__close{right:24px;top:24px;width:40px;height:40px}
@media(max-width:640px){
  .intro__unmute{right:16px;bottom:16px}
  .intro__close{right:16px;top:16px}
}

/* ---------- header ---------- */
.hdr{
  position:fixed;inset:0 0 auto 0;z-index:50;
  padding:20px 0;
  transition:background .4s var(--ease),box-shadow .4s var(--ease),padding .4s var(--ease);
}
.hdr.solid{
  background:rgba(255,255,255,.82);
  backdrop-filter:blur(14px);
  box-shadow:0 1px 0 var(--line);
  padding:13px 0;
}
.hdr .wrap{display:flex;align-items:center;gap:36px}
.logo{font-size:1.3rem;font-weight:600;letter-spacing:.22em;color:var(--ink);transition:color .4s var(--ease)}
.nav{display:flex;gap:28px;margin-left:auto;font-size:.93rem;color:var(--ink-2);transition:color .4s var(--ease)}
.nav a{position:relative;padding:4px 0}
.nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:currentColor;transform:scaleX(0);transform-origin:right;
  transition:transform .35s var(--ease);
}
.nav a:hover::after{transform:scaleX(1);transform-origin:left}
.burger{display:none;margin-left:auto;background:none;border:0;padding:8px;cursor:pointer}
.burger span{display:block;width:24px;height:2px;background:var(--ink);margin:5px 0}

/* ---------- hero ---------- */
.hero{
  position:relative;min-height:100svh;
  display:flex;align-items:flex-end;
  overflow:hidden;background:var(--bg);
}
.hero__media{position:absolute;inset:0 0 0 auto;width:min(49vw,860px);overflow:hidden;background:#e7e3df}
.hero__media img{
  width:100%;height:100%;object-fit:cover;object-position:center 38%;
  animation:portrait-breathe 16s var(--ease) infinite alternate;
}
@keyframes portrait-breathe{from{transform:scale(1.01)}to{transform:scale(1.045)}}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    linear-gradient(90deg,#fff 0%,#fff 40%,rgba(255,255,255,.82) 52%,rgba(255,255,255,0) 68%),
    linear-gradient(to top,rgba(255,255,255,.64),rgba(255,255,255,0) 35%);
}
.hero__inner{position:relative;z-index:2;width:100%;padding:0 0 clamp(60px,10vh,120px)}
.hero h1{max-width:10.5ch}
.hero h1 em{font-style:normal;font-weight:600}
.hero__sub{margin-top:26px;max-width:42ch;font-size:1.12rem;color:var(--ink-2)}
.hero__cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:38px}

.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:15px 30px;border-radius:100px;border:1px solid transparent;
  font-size:.97rem;font-weight:500;cursor:pointer;
  transition:transform .3s var(--ease),background .3s,color .3s,border-color .3s;
}
.btn:hover{transform:translateY(-2px)}
.btn--solid{background:var(--ink);color:#fff}
.btn--solid:hover{background:var(--accent)}
.btn--ghost{border-color:var(--ink);color:var(--ink)}
.btn--ghost:hover{background:var(--ink);color:#fff}

.sound{
  position:absolute;right:28px;bottom:clamp(60px,10vh,120px);z-index:3;
  width:52px;height:52px;border-radius:50%;
  border:1px solid var(--line);background:rgba(255,255,255,.75);
  backdrop-filter:blur(8px);cursor:pointer;
  display:grid;place-items:center;font-size:1.05rem;
  transition:transform .3s var(--ease),background .3s;
}
.sound:hover{transform:scale(1.08);background:#fff}

/* ---------- reveal ----------
   Прячем только если JS жив и успел поставить класс .js на <html>.
   Без этого при сбое JS страница осталась бы пустой. */
.js .rv{opacity:0;transform:translateY(26px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.js .rv.in{opacity:1;transform:none}

/* ---------- sections ---------- */
section{padding:clamp(80px,11vh,150px) 0}
.sec-head{max-width:60ch;margin-bottom:56px}
.sec-head h2{margin-top:14px}
.sec-head p{margin-top:18px;color:var(--ink-2)}
.section-intro{
  display:grid;grid-template-columns:minmax(0,.86fr) minmax(0,1.14fr);
  gap:clamp(32px,5vw,68px);align-items:center;margin-bottom:56px;
}
.section-intro .sec-head{margin-bottom:0}
.editorial-image{margin:0;overflow:hidden;border-radius:12px;background:var(--bg-mist)}
.editorial-image img{
  width:100%;height:100%;object-fit:cover;
  transition:transform 1.1s var(--ease);
}
.editorial-image:hover img{transform:scale(1.025)}
.editorial-image--product{aspect-ratio:3/2}
.editorial-image--clouds{aspect-ratio:16/9}
.editorial-image--lab{aspect-ratio:3/2;margin-top:42px}

/* stats */
.stats{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stats__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line)}
.stat{background:var(--bg-soft);padding:34px 26px}
.stat__n{font-size:clamp(2.2rem,4vw,3.2rem);font-weight:300;letter-spacing:-.04em;color:var(--accent)}
.stat__l{margin-top:8px;font-size:.93rem;color:var(--ink-2);line-height:1.45}

/* catalog */
.cats{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.cat{
  border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 28px 26px;background:#fff;
  transition:transform .45s var(--ease),box-shadow .45s var(--ease),border-color .45s;
}
.cat:hover{transform:translateY(-5px);box-shadow:0 18px 44px -22px rgba(15,23,32,.28);border-color:transparent}
.cat__n{font-size:.78rem;font-weight:600;color:var(--accent);letter-spacing:.1em}
.cat h3{margin:14px 0 16px}
.cat ul{margin:0;padding:0;list-style:none;font-size:.94rem;color:var(--ink-2)}
.cat li{padding:7px 0;border-top:1px solid var(--line)}

/* process */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;counter-reset:s}
.step{position:relative;padding-top:26px;border-top:2px solid var(--ink);counter-increment:s}
.step::before{
  content:"0" counter(s);
  position:absolute;top:-30px;left:0;
  font-size:.8rem;font-weight:600;color:var(--ink-3);letter-spacing:.1em;
}
.step h3{margin-bottom:10px}
.step p{font-size:.95rem;color:var(--ink-2)}

/* quality */
.quality{background:var(--bg-mist)}
.q-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:start}
.q-list{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.q-item{background:var(--bg-mist);padding:24px 26px}
.q-item h3{font-size:1rem;margin-bottom:6px}
.q-item p{font-size:.93rem;color:var(--ink-2)}

/* cta */
.cta-sec{padding-bottom:clamp(80px,11vh,150px)}
.cta{background:var(--ink);color:#fff;border-radius:var(--radius);padding:clamp(48px,7vw,84px)}
.cta h2{max-width:18ch}
.cta > p{margin-top:18px;max-width:44ch;color:rgba(255,255,255,.72)}
.form{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:36px;max-width:640px}
.form input,.form textarea{
  width:100%;padding:15px 18px;border-radius:12px;
  border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.06);
  color:#fff;font:inherit;font-size:.97rem;
  transition:border-color .3s,background .3s;
}
.form input::placeholder,.form textarea::placeholder{color:rgba(255,255,255,.45)}
.form input:focus,.form textarea:focus{outline:none;border-color:#fff;background:rgba(255,255,255,.1)}
.form textarea{grid-column:1/-1;min-height:104px;resize:vertical}
.form .btn{grid-column:1/-1;justify-self:start;background:#fff;color:var(--ink)}
.form .btn:hover{background:var(--accent);color:#fff}
.form small{grid-column:1/-1;font-size:.8rem;color:rgba(255,255,255,.5)}

/* footer */
.ftr{padding:64px 0 44px;border-top:1px solid var(--line);font-size:.93rem;color:var(--ink-2)}
.ftr__top{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px}
.ftr h3{font-size:.78rem;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3);margin-bottom:16px}
.ftr ul{margin:0;padding:0;list-style:none;display:grid;gap:9px}
.ftr__bot{margin-top:48px;padding-top:24px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;font-size:.85rem;color:var(--ink-3)}
.tel{font-size:1.45rem;font-weight:500;color:var(--ink);letter-spacing:-.02em}

/* ---------- responsive ---------- */
@media(max-width:960px){
  .cats,.steps,.stats__grid{grid-template-columns:repeat(2,1fr)}
  .section-intro{grid-template-columns:1fr;gap:30px}
  .section-intro .sec-head{max-width:66ch}
  .q-grid{grid-template-columns:1fr;gap:40px}
  .ftr__top{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  body{font-size:16px}
  .wrap{padding:0 20px}
  .nav{display:none}
  .burger{display:block}
  .cats,.steps,.stats__grid,.form{grid-template-columns:1fr}
  .hero{min-height:920px}
  .hero__media{inset:0;width:100%}
  .hero__media img{object-position:center top}
  .hero::after{
    background:
      linear-gradient(to top,#fff 0%,rgba(255,255,255,.98) 30%,rgba(255,255,255,.78) 48%,rgba(255,255,255,0) 70%),
      linear-gradient(to bottom,rgba(255,255,255,.2),rgba(255,255,255,0) 30%);
  }
  .hero__inner{padding-bottom:48px}
  .hero h1{font-size:clamp(2.55rem,13vw,3.45rem);max-width:10ch}
  .hero__sub{font-size:1rem;max-width:36ch}
  .hero__cta{margin-top:28px}
  .editorial-image{border-radius:8px}
  .sound{right:20px}
}
@media(prefers-reduced-motion:reduce){
  *{animation-duration:.001s!important;transition-duration:.001s!important}
  .rv{opacity:1;transform:none}
}