/* ГидроКонтур — лендинг. Тёмная тема, heavy industry. */
:root{
  --bg:#0c0e11;
  --bg-alt:#101318;
  --surface:#161a20;
  --surface-2:#1c2129;
  --line:#2a303a;
  --line-soft:#20252d;
  --text:#e9ebee;
  --muted:#a8afb9;
  --muted-2:#8a919c;
  --accent:#e1251b;
  --accent-2:#ff4033;
  --indigo:#7b74e8;
  --radius:4px;
  --wrap:1200px;
  --sp:clamp(56px,8vw,116px);
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif;
  --display:'Oswald','Inter',Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
[hidden]{display:none!important}
html{scroll-behavior:smooth;scroll-padding-top:76px;overflow-x:hidden}
body{
  background:var(--bg);color:var(--text);font-family:var(--font);
  font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;width:100%;max-width:100%;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
/* защита от горизонтального скролла в grid/flex */
.header-in,.stats-grid,.cards-3,.ind-list,.ind-row,.split,.case-grid,
.footer-in,.hero-in,.contact-rows,.client-list,.case-params>div{min-width:0}
h1,h2,h3,p,li,dt,dd,.tag{overflow-wrap:break-word}

/* доступность: фокус и «пропустить к содержанию» */
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid #fff;outline-offset:2px;border-radius:2px
}
.skip-link{
  position:absolute;left:12px;top:-60px;z-index:200;background:var(--accent);color:#fff;
  padding:10px 16px;border-radius:0 0 var(--radius) var(--radius);font-family:var(--display);
  text-transform:uppercase;letter-spacing:.04em;font-size:.85rem;transition:top .18s
}
.skip-link:focus{top:0}

h1,h2,h3{font-family:var(--display);font-weight:600;line-height:1.08;letter-spacing:.005em;text-transform:uppercase}
h1{font-size:clamp(2.1rem,5.4vw,4rem)}
h2{font-size:clamp(1.7rem,3.4vw,2.7rem)}
h3{font-size:clamp(1.15rem,1.7vw,1.4rem);letter-spacing:.02em}
p{color:var(--muted)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.5em;justify-content:center;
  font-family:var(--display);text-transform:uppercase;letter-spacing:.06em;
  font-weight:600;font-size:.82rem;padding:13px 24px;border-radius:var(--radius);
  border:1px solid transparent;cursor:pointer;transition:.18s ease;white-space:nowrap;
}
.btn-lg{padding:16px 30px;font-size:.9rem}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 0 0 rgba(225,37,27,0)}
.btn-accent:hover{background:var(--accent-2);box-shadow:0 8px 30px rgba(225,37,27,.35);transform:translateY(-1px)}
.btn-ghost{border-color:rgba(255,255,255,.28);color:#fff;background:rgba(255,255,255,.03)}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.09)}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  transition:background .25s,border-color .25s,backdrop-filter .25s;
  border-bottom:1px solid transparent;
}
.site-header.scrolled{background:rgba(11,13,16,.92);backdrop-filter:blur(10px);border-color:var(--line-soft)}
.header-in{display:flex;align-items:center;gap:28px;height:76px}
.logo img{height:52px;width:auto;display:block}
.logo-text{font-family:var(--display);font-size:1.3rem;text-transform:uppercase;letter-spacing:.03em}
.main-nav{display:flex;gap:26px;margin-left:6px}
.main-nav a{font-family:var(--display);text-transform:uppercase;letter-spacing:.05em;font-size:.82rem;color:var(--muted);padding:6px 0;position:relative}
.main-nav a:hover{color:#fff}
.main-nav a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;background:var(--accent);transition:right .25s}
.main-nav a:hover::after{right:0}
.header-actions{display:flex;align-items:center;gap:18px;margin-left:auto}
.header-phone{font-family:var(--display);letter-spacing:.03em;font-size:.95rem;color:#fff}
.header-phone:hover{color:var(--accent-2)}
.burger{display:none;background:none;border:0;width:34px;height:26px;position:relative;cursor:pointer}
.burger span{position:absolute;left:0;right:0;height:2px;background:#fff;transition:.25s}
.burger span:nth-child(1){top:2px}.burger span:nth-child(2){top:12px}.burger span:nth-child(3){top:22px}
body.nav-open .burger span:nth-child(1){transform:translateY(10px) rotate(45deg)}
body.nav-open .burger span:nth-child(2){opacity:0}
body.nav-open .burger span:nth-child(3){transform:translateY(-10px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{
  min-height:100svh;display:flex;flex-direction:column;justify-content:center;
  background:#0a0c0f center/cover no-repeat;position:relative;padding:120px 0 90px;
}
.hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--accent)}
.hero-in{max-width:900px}
.hero-kicker{font-family:var(--display);text-transform:uppercase;letter-spacing:.22em;font-size:.8rem;color:var(--accent-2);margin-bottom:22px}
.hero h1{margin-bottom:18px}
.hero h1::after{content:"";display:block;width:70px;height:4px;background:var(--accent);margin-top:24px}
.arr{display:inline-block;position:relative;top:-.175em}
.hero-sub{font-family:var(--display);text-transform:uppercase;letter-spacing:.08em;color:#fff;font-size:clamp(1rem,1.6vw,1.25rem);margin-bottom:20px}
.hero-text{max-width:640px;font-size:1.05rem;margin-bottom:34px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-scroll{position:absolute;left:50%;bottom:26px;width:22px;height:36px;border:2px solid rgba(255,255,255,.4);border-radius:12px;transform:translateX(-50%)}
.hero-scroll::before{content:"";position:absolute;left:50%;top:7px;width:3px;height:8px;background:#fff;border-radius:2px;transform:translateX(-50%);animation:sc 1.6s infinite}
@keyframes sc{0%{opacity:0;transform:translate(-50%,0)}40%{opacity:1}100%{opacity:0;transform:translate(-50%,12px)}}

/* ---------- stats ---------- */
.stats{background:var(--accent);color:#fff;position:relative;z-index:2}
.stats-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:0}
.stat{padding:34px 22px;border-right:1px solid rgba(255,255,255,.16)}
.stat:last-child{border-right:0}
.stat-val{font-family:var(--display);font-size:clamp(1.5rem,2.4vw,2.1rem);font-weight:700;line-height:1}
.stat-label{font-size:.86rem;margin-top:10px;color:rgba(255,255,255,.86);line-height:1.4}

/* ---------- sections ---------- */
.section{padding:var(--sp) 0}
.section-alt{background:var(--bg-alt)}
.sec-head{margin-bottom:48px;max-width:760px}
.sec-head h2::before{content:"";display:inline-block;width:28px;height:4px;background:var(--accent);vertical-align:middle;margin-right:16px;transform:translateY(-6px)}
.sec-sub{margin-top:14px;font-size:1.05rem}
.lead{font-size:1.1rem;color:var(--text);max-width:760px;margin-bottom:28px}

/* cards */
.cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:2px;background:var(--line-soft);border:1px solid var(--line-soft)}
.card{background:var(--surface);padding:38px 32px 34px;transition:.2s}
.card:hover{background:var(--surface-2)}
.card-num{font-family:var(--display);font-size:1rem;color:var(--accent);letter-spacing:.1em;margin-bottom:18px}
.card h3{margin-bottom:12px}
.card-flat{background:var(--bg-alt)}
.section-alt .card-flat{background:var(--surface)}
.prod-grid .card h3{color:#fff}

/* industries */
.ind-list{display:flex;flex-direction:column;gap:2px;background:var(--line-soft);border:1px solid var(--line-soft)}
.ind-row{display:grid;grid-template-columns:minmax(320px,42%) 1fr;background:var(--surface);align-items:center}
.ind-row:nth-child(even){grid-template-columns:1fr minmax(320px,42%)}
.ind-row:nth-child(even) .ind-media{order:2}
.ind-media{position:relative;height:340px;background:#0a0c0f;overflow:hidden}
.ind-media img{width:100%;height:100%;object-fit:cover;filter:grayscale(.15) contrast(1.03)}
.ind-row:hover .ind-media img{transform:scale(1.04)}
.ind-media img{transition:transform .5s ease}
.ind-num{position:absolute;left:22px;top:16px;font-family:var(--display);font-size:2.4rem;font-weight:700;color:#fff;text-shadow:0 2px 20px rgba(0,0,0,.6)}
.ind-body{padding:44px 44px;display:flex;flex-direction:column;justify-content:center}
.ind-body h3{margin-bottom:14px}

/* split (about / randd) */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split-rev .split-media{order:2}
.split-media img{width:100%;height:auto;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius);border:1px solid var(--line);filter:grayscale(.1) contrast(1.03)}
.split-body h2{margin-bottom:20px}
.split-body p{margin-bottom:14px}
.ticks{list-style:none;margin-top:22px;display:grid;gap:12px}
.ticks li{position:relative;padding-left:30px;color:var(--text)}
.ticks li::before{content:"";position:absolute;left:0;top:9px;width:14px;height:8px;border-left:2px solid var(--accent);border-bottom:2px solid var(--accent);transform:rotate(-45deg)}

/* cases */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.case{background:var(--surface);border:1px solid var(--line-soft);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:.2s}
.case:hover{border-color:var(--line);transform:translateY(-3px)}
.case-img{aspect-ratio:4/3;background:#0a0c0f;overflow:hidden}
.case-img img{width:100%;height:100%;object-fit:cover;filter:grayscale(.12) contrast(1.03)}
.case-body{padding:24px 24px 26px;display:flex;flex-direction:column;flex:1}
.tag{align-self:flex-start;font-family:var(--display);text-transform:uppercase;letter-spacing:.05em;font-size:.68rem;color:var(--indigo);border:1px solid var(--line);padding:4px 9px;border-radius:3px;margin-bottom:14px}
.case h3{font-size:1.05rem;margin-bottom:14px}
.case-params{display:grid;gap:6px;margin-bottom:14px;border-top:1px solid var(--line-soft);padding-top:12px}
.case-params>div{display:flex;justify-content:space-between;gap:12px;font-size:.86rem}
.case-params dt{color:var(--muted-2)}
.case-params dd{color:#fff;font-weight:500;text-align:right}
.case-text{font-size:.9rem;margin-top:auto}

/* clients */
.client-list{list-style:none;display:grid;grid-template-columns:repeat(3,1fr);gap:16px 28px;margin-bottom:44px;max-width:960px}
.client-plate{display:flex;align-items:center;gap:8px;width:100%;text-align:left;
  font-family:var(--display);text-transform:uppercase;letter-spacing:.03em;font-size:.95rem;color:var(--text);
  padding:4px 0 4px 16px;border-left:2px solid var(--accent);background:none;border-top:0;border-right:0;border-bottom:0}
button.client-plate{cursor:default;font:inherit;font-family:var(--display);text-transform:uppercase;letter-spacing:.03em;font-size:.95rem}
button.client-plate.is-link{cursor:pointer;transition:color .15s,border-color .15s}
button.client-plate.is-link:hover{color:var(--accent-2);border-left-color:var(--accent-2)}
.client-plate-arr{margin-left:auto;color:var(--muted-2);font-size:.85em;transition:transform .15s,color .15s}
button.client-plate.is-link:hover .client-plate-arr{color:var(--accent-2);transform:translateX(3px)}

/* модальное окно */
.gk-modal{position:fixed;inset:0;z-index:120;background:rgba(6,8,10,.82);display:flex;align-items:center;justify-content:center;padding:20px}
.gk-modal[hidden]{display:none}
.gk-modal-box{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  max-width:640px;width:100%;max-height:88vh;overflow-y:auto;padding:32px 32px 34px;position:relative}
.gk-modal-x{position:absolute;top:12px;right:14px;background:none;border:0;color:var(--muted);font-size:1.7rem;line-height:1;cursor:pointer}
.gk-modal-x:hover{color:#fff}
.gk-modal-box h3{margin-bottom:16px;padding-right:30px}
.gk-modal-work{color:var(--text);line-height:1.6;margin-bottom:20px}
.gk-modal-letter{display:block;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;text-decoration:none}
.gk-modal-letter img{width:100%;display:block;background:#fff}
.gk-modal-letter span{display:block;padding:12px 16px;font-family:var(--display);text-transform:uppercase;letter-spacing:.05em;font-size:.8rem;color:var(--accent-2);background:var(--surface-2)}
.gk-modal-letter:hover span{color:#fff}
.quote{border-left:3px solid var(--accent);padding:8px 0 8px 28px;max-width:820px}
.quote p{font-size:1.2rem;color:var(--text);line-height:1.55;font-style:italic}
.quote cite{display:block;margin-top:14px;font-style:normal;font-size:.9rem;color:var(--muted-2)}

/* certs */
.cert-list{list-style:none;display:grid;grid-template-columns:repeat(2,1fr);gap:2px;background:var(--line-soft);border:1px solid var(--line-soft)}
.cert-list li{background:var(--bg-alt);padding:22px 26px;position:relative;padding-left:52px;color:var(--text)}
.section-alt .cert-list li{background:var(--surface)}
.cert-btn{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;text-align:left;background:none;border:0;padding:0;
  color:inherit;font:inherit;cursor:pointer;transition:color .15s}
.cert-btn:hover{color:var(--accent-2)}
.cert-btn:hover .client-plate-arr{color:var(--accent-2);transform:translateX(3px)}
.gk-doc-pdf{display:none;padding:34px 16px;text-align:center;background:#fff;color:#b3261e;font:700 2.4rem/1 var(--display);letter-spacing:.06em}
.gk-modal-letter.is-pdf .gk-doc-pdf{display:block}
.gk-modal-letter img[hidden]{display:none}
.gk-modal-box.is-wide{max-width:920px}
.gk-doc-embed[hidden]{display:none}
.gk-pdf-pages{display:grid;gap:12px}
.gk-pdf-page{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.gk-pdf-pages canvas{display:block;width:100%;height:auto}
.gk-pdf-status{margin:0 0 4px;color:var(--muted);font-size:.9rem}
.gk-pdf-status[hidden]{display:none}
.gk-doc-newtab{display:inline-block;margin-top:12px;font-family:var(--display);text-transform:uppercase;letter-spacing:.05em;font-size:.8rem;color:var(--accent-2);text-decoration:none}
.gk-doc-newtab:hover{color:#fff}
.cert-list li::before{content:"✓";position:absolute;left:22px;top:22px;color:var(--accent);font-weight:700}

/* contacts + form */
.contacts-in{align-items:start}
.contact-rows{margin-top:24px;border-top:1px solid var(--line);display:grid;grid-template-columns:max-content minmax(0,1fr)}
.crow{display:contents}
.crow-l,.crow-v{padding:14px 0;border-bottom:1px solid var(--line-soft)}
.crow-l{padding-right:28px;color:var(--muted-2);font-size:.9rem;white-space:nowrap;line-height:1.7}
.crow-v{display:flex;flex-direction:column;gap:2px;min-width:0;overflow-wrap:anywhere}
.crow a:hover{color:var(--accent-2)}
@media (max-width:520px){
  .contact-rows{display:block}
  .crow{display:block;padding:12px 0;border-bottom:1px solid var(--line-soft)}
  .crow-l,.crow-v{padding:0;border:0}
  .crow-l{display:block;margin-bottom:2px;font-size:.82rem}
}
.map{margin-top:16px;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;aspect-ratio:16/10}
.map iframe{width:100%;height:100%;border:0;display:block}
.form-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:36px 34px}
.form-card h3{margin-bottom:10px}
.form-lead{font-size:.95rem;margin-bottom:22px}
.form-ok{background:rgba(46,160,90,.14);border:1px solid rgba(46,160,90,.5);color:#8ee0a9;padding:14px 16px;border-radius:var(--radius);margin-bottom:20px;font-size:.92rem}
form.lead{display:grid;gap:16px}
form.lead label{display:grid;gap:7px;font-size:.82rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted-2);font-family:var(--display)}
form.lead input,form.lead textarea{
  background:var(--bg);border:1px solid var(--line);color:var(--text);
  padding:13px 14px;border-radius:var(--radius);font:inherit;font-size:.95rem;
  text-transform:none;letter-spacing:normal;transition:border-color .15s;
}
form.lead input:focus,form.lead textarea:focus{outline:none;border-color:var(--accent)}
form.lead textarea{resize:vertical}
form.lead button{margin-top:4px}
.form-privacy{font-size:.78rem;color:var(--muted-2);margin-top:2px}
.form-privacy a{color:var(--muted);text-decoration:underline;text-underline-offset:2px}
.form-privacy a:hover{color:var(--text)}
.captcha b{color:var(--text,#fff);font-family:var(--display);letter-spacing:.06em;white-space:nowrap}
form.lead .captcha input{max-width:120px}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}

/* footer */
.site-footer{background:#08090b;border-top:1px solid var(--line-soft);padding:52px 0 40px}
.footer-in{display:grid;gap:16px;text-align:center;max-width:820px;margin:0 auto}
.footer-brand img{height:80px;width:auto;max-width:100%;object-fit:contain;margin:0 auto;display:block}
.footer-copy{color:var(--muted)}
.footer-req{font-size:.8rem;color:var(--muted-2);line-height:1.6}
.footer-links{font-size:.8rem;color:var(--muted-2);display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.footer-links a{color:var(--muted-2);text-decoration:underline;text-underline-offset:3px}
.footer-links a:hover{color:var(--text)}

/* to-top */
.to-top{position:fixed;right:22px;bottom:22px;z-index:60;width:46px;height:46px;display:grid;place-items:center;
  background:var(--accent);color:#fff;border-radius:var(--radius);font-size:1.2rem;opacity:0;pointer-events:none;transition:.25s;transform:translateY(10px)}
.to-top.show{opacity:1;pointer-events:auto;transform:none}
.to-top:hover{background:var(--accent-2)}

/* reveal animation — включается только если работает JS */
.js .reveal{opacity:0;transform:translateY(20px);transition:opacity .5s ease,transform .5s ease;transition-delay:var(--d,0ms)}
.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.js .reveal{opacity:1;transform:none;transition:none}.hero-scroll::before{animation:none}}

/* ---------- responsive ---------- */
@media (max-width:1000px){
  .stats-grid{grid-template-columns:repeat(3,1fr)}
  .stat:nth-child(3){border-right:0}
  .cards-3,.case-grid{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:32px}
  .split-rev .split-media,.ind-row:nth-child(even) .ind-media{order:0}
  .ind-row,.ind-row:nth-child(even){grid-template-columns:1fr}
  .ind-media{height:230px}
  .cert-list{grid-template-columns:1fr}
  .client-list{grid-template-columns:repeat(2,1fr)}
}
/* меню сворачивается в «бургер» заранее, пока полное меню ещё помещается */
@media (max-width:920px){
  .main-nav,.header-phone,.header-cta{display:none}
  .burger{display:block}
  .main-nav.open{
    display:flex;flex-direction:column;position:fixed;inset:76px 0 auto 0;
    background:rgba(11,13,16,.98);backdrop-filter:blur(8px);padding:20px 24px;gap:4px;
    border-bottom:1px solid var(--line);max-height:calc(100vh - 76px);overflow-y:auto;
  }
  .main-nav.open a{font-size:1rem;padding:14px 0;border-bottom:1px solid var(--line-soft)}
  .main-nav.open a::after{display:none}
}
@media (max-width:760px){
  body{font-size:16px}
  .logo img{height:46px}
  .footer-brand img{height:52px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat{border-right:1px solid rgba(255,255,255,.16)!important;border-bottom:1px solid rgba(255,255,255,.16)}
  .stat:nth-child(2n){border-right:0!important}
  .cards-3,.case-grid{grid-template-columns:1fr}
  .ind-body{padding:30px 26px}
  .form-card{padding:26px 22px}
  .hero{min-height:auto;padding:116px 0 70px}
  .crow{flex-wrap:wrap;gap:2px 16px}
  .crow-l{flex:0 0 auto;min-width:120px}
}
@media (max-width:400px){
  .wrap{padding:0 18px}
  .hero-kicker{letter-spacing:.1em;font-size:.72rem}
  .hero h1{font-size:clamp(1.8rem,8vw,2.4rem)}
  .sec-head h2::before{display:none}
  .client-list{grid-template-columns:1fr}
  .client-plate,button.client-plate{font-size:.86rem}
}
@media (max-width:380px){
  .stats-grid{grid-template-columns:1fr}
  .stat{border-right:0!important}
  .stat:last-child{border-bottom:0}
}