/* ============================================
   ИНФРАС-ТЕЛ — стили сайта
   Языс: матрица точек из логотипа — узлы сети,
   облако точек сканирования, пиксели двойника.
   ============================================ */

/* ============ ТОКЕНЫ ============ */
:root{
  --ink:#2B2727; --deep:#211D1E; --berry:#C1144E; --berry-dk:#92103C;
  --bg:#FFFFFF; --bg-alt:#F7F4F5; --muted:#8A8285; --line:#E7E1E3;
  --h:"Unbounded","Golos Text",sans-serif; --b:"Golos Text",system-ui,sans-serif; --m:"IBM Plex Mono",monospace;
  --r:2px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--b);font-size:16px;color:var(--ink);background:var(--bg);line-height:1.65}
h1,h2,h3{font-family:var(--h);font-weight:600;line-height:1.22;color:var(--ink);letter-spacing:-.01em}
h1{font-size:clamp(27px,4vw,46px);font-weight:600}
h2{font-size:clamp(22px,2.8vw,32px)}
h3{font-size:clamp(18px,1.9vw,21px);font-weight:500}
a{color:var(--ink);text-decoration:none;transition:color .15s}
a:hover{color:var(--berry)}
:focus-visible{outline:2px solid var(--berry);outline-offset:3px;border-radius:2px}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.mono{font-family:var(--m);font-size:13px;letter-spacing:.06em}
.berry{color:var(--berry)}
.lead{max-width:640px;color:var(--muted);margin-top:16px;font-size:18px}
.section{padding:84px 0}
.section-alt{background:var(--bg-alt)}
.section-dark{background:var(--deep);color:#CFC9CB}
.section-dark h2,.section-dark h3{color:#fff}
.btn{display:inline-block;font-family:var(--b);font-weight:600;background:var(--berry);color:#fff;
  padding:14px 32px;border-radius:var(--r);border:none;cursor:pointer;font-size:16px;transition:background .15s}
.btn:hover{background:var(--berry-dk);color:#fff}
.btn-ghost{display:inline-block;font-family:var(--b);font-weight:600;background:transparent;color:var(--ink);
  padding:13px 32px;border-radius:var(--r);border:1px solid var(--ink);cursor:pointer;transition:all .15s}
.btn-ghost:hover{border-color:var(--berry);color:var(--berry)}
.btn-line{display:inline-block;font-family:var(--m);font-size:13px;letter-spacing:.06em;color:var(--berry);
  border-bottom:1px solid transparent;padding-bottom:2px}
.btn-line:hover{border-bottom-color:var(--berry)}

/* Маркер секции — фрагмент матрицы 2×2 */
.dotmark{display:inline-grid;grid-template-columns:8px 8px;gap:5px;margin-bottom:18px}
.dotmark i{width:8px;height:8px;border-radius:50%;background:var(--berry)}
.dotmark i:nth-child(2){opacity:.45}
.dotmark i:nth-child(3){opacity:.45}
.dotmark i:nth-child(4){opacity:.2}

/* ============ ШАПКА ============ */
header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.header-in{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px}
.logo{display:flex;align-items:center;gap:11px;font-family:var(--h);font-weight:700;font-size:17px;letter-spacing:.01em;color:var(--ink)}
.logo svg{flex-shrink:0}
.logo .tl{color:var(--berry);font-weight:700}
.logo-inv{color:#fff}
nav{display:flex;gap:26px;align-items:center}
nav a{font-size:15px;font-weight:500;color:var(--ink);padding:6px 0;border-bottom:2px solid transparent}
nav a:hover{color:var(--berry)}
nav a.active{border-bottom-color:var(--berry)}
.header-phone{font-family:var(--m);font-size:14px;white-space:nowrap}
.burger{display:none;background:none;border:none;cursor:pointer;padding:8px}
.burger span{display:block;width:24px;height:2px;background:var(--ink);margin:5px 0}
@media(max-width:1024px){
  nav{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;
    align-items:flex-start;padding:24px;gap:16px;border-bottom:1px solid var(--line)}
  nav.open{display:flex}
  .burger{display:block}
  .header-phone{display:none}
}

/* ============ HERO ============ */
.hero{position:relative;overflow:hidden;background:#fff}
.hero .container{position:relative;z-index:2;padding-top:104px;padding-bottom:104px}
.hero h1{max-width:720px}
.hero .lead{max-width:560px;font-size:19px}
.hero-actions{margin-top:40px;display:flex;gap:16px;flex-wrap:wrap}
.hero-facts{display:flex;gap:0;margin-top:64px;border-top:1px solid var(--line);flex-wrap:wrap}
.hero-facts>div{padding:20px 40px 4px 0;margin-right:40px}
.hero-facts .mono{color:var(--berry);font-size:15px}
.hero-facts .lbl{color:var(--muted);font-size:13px;margin-top:4px}
@media(max-width:640px){.hero-facts{display:grid;grid-template-columns:1fr 1fr;gap:8px 20px}
  .hero-facts>div{margin-right:0;padding-right:0}}
@media(max-width:768px){.hero .container{padding-top:64px;padding-bottom:64px}}
#dots{position:absolute;inset:0;z-index:1;pointer-events:none;
  -webkit-mask-image:linear-gradient(90deg,transparent 30%,#000 75%);
  mask-image:linear-gradient(90deg,transparent 30%,#000 75%)}
@media(max-width:900px){#dots{opacity:.4;-webkit-mask-image:none;mask-image:none}}

/* ============ МАТРИЦА НАПРАВЛЕНИЙ (3×3, как знак) ============ */
.matrix{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.mx-cell{background:#fff;padding:30px 28px 34px;transition:background .15s;position:relative}
.mx-cell:hover{background:var(--bg-alt)}
.mx-cell .code{font-family:var(--m);font-size:12px;letter-spacing:.08em;color:var(--muted);
  display:flex;align-items:center;gap:10px}
.mx-cell .code::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--line);transition:background .15s}
.mx-cell:hover .code{color:var(--berry)}
.mx-cell:hover .code::before{background:var(--berry)}
.mx-cell h3{margin:14px 0 8px;font-size:17px;line-height:1.35}
.mx-cell p{font-size:14px;color:var(--muted)}
@media(max-width:900px){.matrix{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.matrix{grid-template-columns:1fr}}

/* ============ СПИСОК УСЛУГ (страница «Услуги») ============ */
.svc{border-top:1px solid var(--line);padding:34px 0;display:grid;grid-template-columns:150px 1fr 340px;gap:32px}
.svc:last-of-type{border-bottom:1px solid var(--line)}
.svc .code{font-family:var(--m);font-size:13px;letter-spacing:.08em;color:var(--berry);padding-top:4px}
.svc h3{font-size:20px}
.svc .d{font-size:15px;color:var(--muted);margin-top:10px;max-width:560px}
.svc ul{list-style:none;margin-top:2px}
.svc li{font-size:14px;color:var(--ink);padding:7px 0 7px 18px;position:relative;border-bottom:1px dashed var(--line)}
.svc li:last-child{border-bottom:none}
.svc li::before{content:"";position:absolute;left:0;top:13px;width:6px;height:6px;border-radius:50%;background:var(--berry);opacity:.55}
@media(max-width:900px){.svc{grid-template-columns:1fr;gap:12px;padding:28px 0}}

/* ============ МЕТРИКИ ============ */
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.metric{border-left:2px solid var(--berry);padding:6px 0 6px 24px}
.metric .v{font-family:var(--h);font-weight:600;font-size:clamp(30px,3.4vw,44px);color:var(--berry);line-height:1.1}
.metric .t{color:var(--muted);font-size:14px;margin-top:10px;max-width:240px}
@media(max-width:800px){.metrics{grid-template-columns:1fr}}

/* ============ ЭТАПЫ (таймлайн, данные как данные) ============ */
.tline{border-top:1px solid var(--line)}
.trow{display:grid;grid-template-columns:64px 1fr 150px;gap:24px;padding:22px 0;border-bottom:1px solid var(--line);align-items:baseline}
.trow .n{font-family:var(--m);font-size:13px;color:var(--berry)}
.trow h3{font-size:17px;font-weight:500}
.trow .t{font-size:14px;color:var(--muted);margin-top:6px;max-width:560px}
.trow .days{font-family:var(--m);font-size:13px;letter-spacing:.04em;color:var(--ink);text-align:right;white-space:nowrap}
@media(max-width:700px){.trow{grid-template-columns:44px 1fr}.trow .days{text-align:left;grid-column:2;margin-top:6px}}

/* ============ 4 ЭТАПА РАБОТЫ (тёмная секция) ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:32px}
.step{border-top:2px solid #454042;padding-top:18px}
.step .n{font-family:var(--m);font-size:13px;color:var(--berry)}
.step h3{font-size:17px;margin:12px 0 8px;color:#fff}
.step p{font-size:14px;color:#9d9598}
@media(max-width:900px){.steps{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.steps{grid-template-columns:1fr}}

/* ============ ОТРАСЛИ ============ */
.industries{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.ind{background:#fff;padding:26px 20px;font-family:var(--h);font-weight:500;font-size:15px;line-height:1.4;color:var(--ink);min-height:110px}
.ind small{display:block;font-family:var(--m);font-weight:500;font-size:11px;letter-spacing:.06em;color:var(--muted);margin-top:8px}
@media(max-width:1000px){.industries{grid-template-columns:repeat(3,1fr)}}
@media(max-width:600px){.industries{grid-template-columns:repeat(2,1fr)}}

/* ============ СТАТЬИ ============ */
.art{border-top:1px solid var(--line);padding:28px 0;display:grid;grid-template-columns:150px 1fr;gap:28px}
.art:last-of-type{border-bottom:1px solid var(--line)}
.art .meta{font-family:var(--m);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);padding-top:5px}
.art .meta b{display:block;color:var(--berry);font-weight:500;margin-bottom:6px}
.art h3{font-size:19px;font-weight:500}
.art p{font-size:14px;color:var(--muted);margin-top:8px;max-width:640px}
.art:hover h3{color:var(--berry)}
@media(max-width:700px){.art{grid-template-columns:1fr;gap:10px;padding:24px 0}}

/* ============ CTA-ПОЛОСА ============ */
.cta-band{background:var(--berry);color:#fff}
.cta-band .container{padding-top:64px;padding-bottom:64px;display:flex;justify-content:space-between;align-items:center;gap:32px;flex-wrap:wrap}
.cta-band h2{color:#fff;font-size:clamp(22px,2.6vw,30px);max-width:560px}
.cta-band p{margin-top:10px;color:rgba(255,255,255,.85)}
.cta-band .btn{background:#fff;color:var(--berry)}
.cta-band .btn:hover{background:#F3DFE6}
.cta-band .btn-ghost{color:#fff;border-color:rgba(255,255,255,.6)}
.cta-band .btn-ghost:hover{border-color:#fff;color:#fff}

/* ============ КОНТАКТЫ ============ */
.person{border:1px solid var(--line);border-radius:var(--r);padding:24px}
.person .role{font-family:var(--m);font-size:11px;color:var(--berry);letter-spacing:.08em;text-transform:uppercase;margin-bottom:6px}
.person h3{font-size:19px}
.person a{font-family:var(--m);font-size:14px;display:inline-block;margin-top:10px}
.kv{display:grid;grid-template-columns:200px 1fr;gap:8px 24px;font-size:15px;border-top:1px solid var(--line);padding-top:24px;margin-top:24px}
.kv .k{font-family:var(--m);font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;padding-top:2px}
@media(max-width:640px){.kv{grid-template-columns:1fr}}
details{border:1px solid var(--line);border-radius:var(--r);padding:16px 20px;margin-bottom:12px;background:#fff}
summary{font-family:var(--b);font-weight:600;cursor:pointer;font-size:16px}
details .kv{margin-top:16px;border-top:none;padding-top:8px}
input,textarea{width:100%;border:1px solid var(--line);border-radius:var(--r);padding:14px;font-family:var(--b);font-size:15px;background:#fff}
input:focus,textarea:focus{outline:none;border-color:var(--berry)}
.consent{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--muted)}
.consent input{width:auto;margin-top:3px;accent-color:var(--berry)}
label{font-family:var(--m);font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);display:block;margin-bottom:6px}
.form-grid{display:grid;gap:20px;max-width:560px}

/* ============ ЮРИДИЧЕСКИЕ СТРАНИЦЫ / СТАТЬИ ============ */
.doc{max-width:760px;margin-top:40px}
.doc h2{font-size:20px;margin:40px 0 12px}
.doc p{font-size:15px}
.doc ul{margin:12px 0 0 20px;font-size:15px}
.doc li{margin-bottom:6px}
.article-body{max-width:760px;margin-top:32px;font-size:16px;line-height:1.7}
.article-body p{margin:0 0 16px}
.article-body ul,.article-body ol{margin:0 0 16px 22px}
.article-body li{margin-bottom:8px}
.article-body img{max-width:100%;height:auto;border-radius:var(--r);margin:16px 0}
.article-body h3,.article-body h4{font-family:var(--b);font-weight:600;color:var(--ink);margin:28px 0 12px;font-size:19px;line-height:1.35}
.article-body b{color:var(--ink)}
.crumbs{font-family:var(--m);font-size:12px;letter-spacing:.06em;color:var(--muted)}

/* ============ ФУТЕР ============ */
footer{background:var(--deep);color:#8A8285;padding:56px 0 32px;font-size:14px;position:relative;overflow:hidden}
footer::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:radial-gradient(rgba(255,255,255,.07) 1.3px,transparent 1.3px);
  background-size:26px 26px;
  -webkit-mask-image:linear-gradient(115deg,#000 0%,transparent 45%);
  mask-image:linear-gradient(115deg,#000 0%,transparent 45%)}
.footer-in{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap;position:relative}
.footer-in>div{position:relative}
footer a{color:#B8B1B3}footer a:hover{color:#F0618D}
footer .mono{color:#6F686B}
footer p{max-width:300px}

/* ============ УВЕДОМЛЕНИЯ ============ */
.notice{background:var(--bg-alt);border-left:3px solid var(--berry);padding:16px 20px;font-size:14px;color:var(--muted);border-radius:0 var(--r) var(--r) 0;margin-top:24px;margin-bottom:24px}
.notice.success{background:#E9F6EE;border-left-color:#3E9B5F;color:#2E7D46}
.notice.error{background:#FCEBED;border-left-color:var(--berry-dk);color:var(--berry-dk)}

/* ============ ДОСТУПНОСТЬ ============ */
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
}