/* ============================================================
   Строймонтажрегион — общий стиль сайта (style.css)
   Подключается на всех страницах: <link rel="stylesheet" href="style.css">
   Светло-серая тема. Шрифты Oswald + Inter подключаются в <head> страницы.
   ============================================================ */

:root{
  --sky:#DBE8F8;
  --sky-2:#CDDFF5;
  --paper:#E9F1FC;
  --white:#FFFFFF;
  --blue:#1E56B0;        /* акцент (синий) */
  --blue-deep:#123B7A;   /* акцент тёмный */
  --navy:#0B1220;        /* тёмный для заголовков/подвала */
  --ink:#0A0A0A;         /* основной текст */
  --muted:#37455A;       /* приглушённый текст */
  --line:#C3D5EC;
  --line-soft:rgba(12,24,48,.10);
  --amber:#F5A524;       /* второй акцент (янтарный) */
  --amber-deep:#E88709;  /* янтарный тёмный */
  --shadow:0 18px 40px -24px rgba(18,40,80,.28);
  --maxw:1200px;
  --reader:1080px;
}

/* ---------- Base ---------- */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Inter',system-ui,Arial,sans-serif;
  color:var(--ink);
  background:var(--paper);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,.display{font-family:'Oswald',sans-serif;font-weight:600;line-height:1.08;letter-spacing:.01em;color:var(--navy)}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
.reader{max-width:var(--reader);margin:0 auto;padding:0 24px}
.eyebrow{
  font-family:'Oswald',sans-serif;font-weight:500;
  text-transform:uppercase;letter-spacing:.22em;
  font-size:.78rem;color:var(--blue-deep);
  display:inline-flex;align-items:center;gap:12px;
}
.eyebrow::before{content:"";width:34px;height:2px;background:var(--blue)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  font-family:'Oswald',sans-serif;font-weight:600;
  text-transform:uppercase;letter-spacing:.06em;font-size:.95rem;
  padding:15px 28px;border:2px solid transparent;cursor:pointer;
  transition:.2s ease;background:none;border-radius:6px;
}
.btn-amber,.btn-accent{background:var(--blue);color:#fff}
.btn-amber:hover,.btn-accent:hover{background:var(--blue-deep)}
.btn-ghost{border-color:var(--blue);color:var(--blue-deep)}
.btn-ghost:hover{background:var(--blue);color:#fff}
.btn-dark{background:var(--navy);color:#fff}
.btn-dark:hover{background:#123B7A}
:focus-visible{outline:3px solid var(--blue);outline-offset:3px}

/* ---------- Header ---------- */
header{position:sticky;top:0;z-index:50;background:rgba(233,241,252,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;height:74px;color:var(--ink)}
.logo{display:flex;align-items:center;gap:13px}
.mark{
  width:44px;height:44px;flex:none;background:var(--blue);color:#fff;border-radius:8px;
  font-family:'Oswald',sans-serif;font-weight:700;font-size:1.15rem;
  display:grid;place-items:center;position:relative;
}
.mark::after{content:"";position:absolute;inset:5px;border:1.5px solid rgba(255,255,255,.45);border-radius:4px}
.logo b{font-family:'Oswald',sans-serif;font-weight:600;font-size:1.18rem;letter-spacing:.03em;text-transform:uppercase;line-height:1;color:var(--navy)}
.logo span{display:block;font-size:.68rem;letter-spacing:.18em;color:var(--blue);text-transform:uppercase;margin-top:3px}
nav{display:flex;gap:28px}
nav a{font-size:.9rem;color:var(--muted);transition:.2s}
nav a:hover,nav a.active{color:var(--blue)}
.head-cta{display:flex;align-items:center;gap:22px}
.menu{display:contents}
.phone{font-family:'Oswald',sans-serif;font-weight:600;font-size:1.1rem;color:var(--navy);white-space:nowrap}
.phone small{display:block;font-family:'Inter';font-weight:400;font-size:.68rem;color:var(--muted);letter-spacing:.05em}
.burger{display:none;background:none;border:none;color:var(--navy);cursor:pointer;padding:8px;margin:-8px;line-height:0}
.burger svg{width:28px;height:28px}

/* ---------- Hero (главная) ---------- */
.hero{position:relative;background:linear-gradient(135deg,#D8E6F7 0%,#EEF4FC 58%);color:var(--ink);overflow:hidden}
.blueprint{
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(30,86,176,.10) 1px,transparent 1px),
    linear-gradient(90deg,rgba(30,86,176,.10) 1px,transparent 1px);
  background-size:46px 46px;
  mask-image:linear-gradient(120deg,#000 40%,transparent 92%);
  -webkit-mask-image:linear-gradient(120deg,#000 40%,transparent 92%);
}
.hero-glow{position:absolute;right:-10%;top:-20%;width:60%;height:120%;
  background:radial-gradient(circle at 60% 40%,rgba(30,86,176,.12),transparent 60%);pointer-events:none}
.hero-inner{position:relative;padding:86px 0 70px 18px;display:grid;grid-template-columns:1.25fr .9fr;gap:56px;align-items:center}
.hero h1{font-size:clamp(2.5rem,5.2vw,4.6rem);text-transform:uppercase;font-weight:700;color:var(--navy)}
.hero h1 .amber{color:var(--blue)}
.hero p.lead{margin:26px 0 34px;font-size:1.12rem;color:var(--muted);max-width:44ch}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-card{
  background:var(--white);border:1px solid var(--line);padding:34px 32px;
  position:relative;border-radius:12px;box-shadow:var(--shadow);
}
.hero-card::before{content:"";position:absolute;top:0;left:0;width:56px;height:4px;background:var(--blue);border-radius:0 0 4px 0}
.hero-card h3{font-size:1.1rem;text-transform:uppercase;letter-spacing:.05em;margin-bottom:18px;color:var(--navy)}
.hero-card ul{list-style:none;display:grid;gap:13px}
.hero-card li{display:flex;gap:12px;font-size:.97rem;color:var(--ink)}
.hero-card li b{color:var(--blue);font-family:'Oswald';font-weight:600;flex:none}

/* stats strip */
.stats{position:relative;border-top:1px solid var(--line);background:var(--sky-2)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:30px 24px;border-right:1px solid var(--line)}
.stat:last-child{border-right:none}
.stat .n{font-family:'Oswald';font-weight:700;font-size:2.7rem;color:var(--blue);line-height:1}
.stat .l{font-size:.86rem;color:var(--muted);margin-top:8px;letter-spacing:.02em}

/* ---------- generic section ---------- */
section{padding:92px 0}
.sec-head{max-width:720px;margin-bottom:52px}
.sec-head h2{font-size:clamp(1.9rem,3.6vw,2.9rem);text-transform:uppercase;margin:16px 0 14px;font-weight:700;color:var(--navy)}
.sec-head p{color:var(--muted);font-size:1.05rem}

/* ---------- Services ---------- */
.services{background:var(--paper)}
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--line);border-bottom:none;border-right:none;border-radius:12px;overflow:hidden}
.svc{
  padding:38px 34px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);
  background:var(--white);position:relative;transition:.22s ease;
}
.svc:hover{background:var(--blue);color:#fff;transform:translateY(-2px)}
.svc .num{font-family:'Oswald';font-weight:600;font-size:.82rem;letter-spacing:.18em;color:var(--blue-deep)}
.svc:hover .num{color:#fff}
.svc h3{font-size:1.32rem;text-transform:uppercase;margin:16px 0 12px;font-weight:600;color:var(--navy)}
.svc:hover h3{color:#fff}
.svc p{font-size:.95rem;color:var(--muted);transition:.22s}
.svc:hover p{color:rgba(255,255,255,.9)}
.svc .arrow{margin-top:18px;font-family:'Oswald';font-weight:600;font-size:.85rem;letter-spacing:.1em;text-transform:uppercase;color:var(--blue-deep);opacity:0;transform:translateX(-6px);transition:.22s}
.svc:hover .arrow{opacity:1;transform:none;color:#fff}

/* ---------- Advantages ---------- */
.adv{background:var(--sky)}
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.adv-card{padding:32px 26px;background:var(--white);border-top:4px solid var(--blue);border-radius:0 0 12px 12px;box-shadow:var(--shadow)}
.adv-card .ic{width:46px;height:46px;color:var(--blue);margin-bottom:18px}
.adv-card h3{font-size:1.12rem;text-transform:uppercase;margin-bottom:10px;font-weight:600;color:var(--navy)}
.adv-card p{font-size:.92rem;color:var(--muted)}

/* ---------- Process ---------- */
.proc{background:var(--sky-2);position:relative;overflow:hidden}
.proc .blueprint{mask-image:linear-gradient(200deg,#000 30%,transparent 90%);-webkit-mask-image:linear-gradient(200deg,#000 30%,transparent 90%)}
.proc-grid{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:0}
.step{padding:30px 24px 30px 0;border-top:2px solid var(--line);position:relative}
.step::before{content:"";position:absolute;top:-2px;left:0;width:38%;height:2px;background:var(--blue)}
.step .s{font-family:'Oswald';font-weight:700;font-size:2.4rem;color:var(--blue);line-height:1}
.step h3{font-size:1.05rem;text-transform:uppercase;margin:14px 0 8px;font-weight:600;color:var(--navy)}
.step p{font-size:.88rem;color:var(--muted)}

/* ---------- CTA band ---------- */
.band{background:linear-gradient(120deg,var(--blue) 0%,var(--blue-deep) 100%);color:#fff}
.band .wrap{display:flex;align-items:center;justify-content:space-between;gap:40px;padding-top:56px;padding-bottom:56px}
.band h2{font-size:clamp(1.7rem,3vw,2.5rem);text-transform:uppercase;font-weight:700;max-width:20ch;color:#fff}
.band p{margin-top:12px;font-weight:500;max-width:46ch;color:rgba(255,255,255,.92)}

/* ---------- Contacts ---------- */
.contacts{background:var(--sky)}
.cont-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px}
.cont-info h2{font-size:clamp(1.9rem,3.4vw,2.7rem);text-transform:uppercase;font-weight:700;margin-bottom:26px;color:var(--navy)}
.cont-list{list-style:none;display:grid;gap:22px;margin-top:8px}
.cont-list li{display:flex;gap:16px;align-items:flex-start}
.cont-list .ic{width:40px;height:40px;flex:none;background:var(--blue);border-radius:8px;display:grid;place-items:center;color:#fff}
.cont-list .ic svg{width:20px;height:20px}
.cont-list .k{font-size:.75rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.cont-list .v{font-family:'Oswald';font-weight:500;font-size:1.15rem;color:var(--navy)}
.form{background:var(--white);border:1px solid var(--line);padding:38px 34px;border-radius:12px;box-shadow:var(--shadow)}
.form h3{text-transform:uppercase;font-size:1.3rem;margin-bottom:6px;font-weight:600;color:var(--navy)}
.form .sub{font-size:.9rem;color:var(--muted);margin-bottom:24px}
.field{margin-bottom:16px}
.field label{display:block;font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:7px}
.field input,.field textarea{
  width:100%;background:var(--paper);border:1px solid var(--line);border-radius:6px;
  color:var(--ink);padding:13px 15px;font-family:'Inter';font-size:.98rem;transition:.2s;
}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--blue);background:#fff}
.field textarea{resize:vertical;min-height:92px}
.form .btn{width:100%;justify-content:center;margin-top:8px}
.form .note{font-size:.74rem;color:var(--muted);margin-top:14px;line-height:1.5}
.ok{display:none;text-align:center;padding:30px 10px}
.ok.show{display:block}
.ok .ic{width:60px;height:60px;background:var(--blue);color:#fff;border-radius:50%;display:grid;place-items:center;margin:0 auto 18px}
.ok h3{margin-bottom:8px;color:var(--navy)}
.ok p{color:var(--muted);font-size:.95rem}

/* ============================================================
   Раздел статей (страница «Строительно-монтажные работы»)
   ============================================================ */

/* Page hero — своя вертикальная отбивка, гасим общий section{padding} */
.page-hero{padding:0;background:linear-gradient(135deg,#D8E6F7 0%,#EEF4FC 60%);border-bottom:1px solid var(--line);position:relative;overflow:hidden}
.page-hero .grid{position:absolute;inset:0;background-image:linear-gradient(rgba(30,86,176,.09) 1px,transparent 1px),linear-gradient(90deg,rgba(30,86,176,.09) 1px,transparent 1px);background-size:44px 44px;mask-image:linear-gradient(120deg,#000 45%,transparent 92%);-webkit-mask-image:linear-gradient(120deg,#000 45%,transparent 92%)}
.page-hero .inner{position:relative;padding:64px 0 58px}
.crumbs{font-size:.85rem;color:var(--muted);margin-bottom:18px}
.crumbs a:hover{color:var(--blue)}
.page-hero h1{font-size:clamp(2.1rem,4.4vw,3.4rem);text-transform:uppercase;font-weight:700;margin:16px 0 16px}
.page-hero p{max-width:70ch;color:var(--muted);font-size:1.08rem}

/* Оглавление */
.toc{max-width:var(--reader);margin:44px auto 0;padding:0 24px}
.toc-inner{background:var(--white);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);padding:26px 30px}
.toc h2{font-size:.95rem;text-transform:uppercase;letter-spacing:.14em;color:var(--muted);margin-bottom:16px}
.toc ol{list-style:none;counter-reset:t;display:grid;gap:12px}
.toc li{counter-increment:t;display:flex;gap:14px;align-items:baseline;padding-bottom:12px;border-bottom:1px solid var(--line)}
.toc li:last-child{border-bottom:none;padding-bottom:0}
.toc li::before{content:counter(t,decimal-leading-zero);font-family:'Oswald';font-weight:700;color:var(--blue);font-size:1rem;flex:none}
.toc a{font-family:'Oswald';font-weight:500;text-transform:uppercase;letter-spacing:.03em;font-size:1.02rem;color:var(--navy)}
.toc a:hover{color:var(--blue)}
.toc .d{display:block;font-family:'Inter';font-weight:400;text-transform:none;letter-spacing:0;font-size:.86rem;color:var(--muted);margin-top:2px}

/* Статьи */
main{padding:60px 0 40px}
.article{max-width:var(--reader);margin:0 auto 56px;padding:0 24px}
.article-inner{background:var(--white);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);overflow:hidden}
.article-media{position:relative;width:100%;aspect-ratio:16/6;background:var(--navy)}
.article-media svg{position:absolute;inset:0;width:100%;height:100%}
.article-media .cap{position:absolute;left:20px;bottom:16px;background:rgba(11,18,32,.82);color:#fff;font-family:'Oswald';font-weight:500;text-transform:uppercase;letter-spacing:.06em;font-size:.72rem;padding:6px 12px;border-radius:4px}
.article-body{padding:44px clamp(22px,4vw,60px) 50px;line-height:1.7}
.a-tag{font-family:'Oswald';font-weight:500;text-transform:uppercase;letter-spacing:.18em;font-size:.74rem;color:var(--blue-deep)}
.article-body h2{font-size:clamp(1.6rem,3vw,2.25rem);text-transform:uppercase;margin:14px 0 10px}
.article-body h2::before{content:"";display:block;width:54px;height:4px;border-radius:4px;background:linear-gradient(90deg,var(--amber),var(--amber-deep));margin-bottom:14px}
.article-body .meta{font-size:.85rem;color:var(--muted);margin-bottom:26px;display:flex;gap:18px;flex-wrap:wrap;border-bottom:1px solid var(--line);padding-bottom:20px}
.article-body h3{font-size:1.4rem;margin:38px 0 12px;padding-top:6px}
.article-body h4{font-size:1.12rem;margin:26px 0 8px;color:var(--ink)}
.article-body p{margin:0 0 16px}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:22px}
.article-body li{margin-bottom:9px}
.article-body p.lead{font-size:1.14rem;color:var(--ink)}
.article-body strong{color:var(--navy)}
.callout{background:var(--sky);border-left:4px solid var(--blue);border-radius:0 8px 8px 0;padding:18px 22px;margin:24px 0;font-size:.98rem}
.callout b{color:var(--navy)}
.keyfacts{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:26px 0}
.keyfacts div{padding:20px 18px;border-right:1px solid var(--line)}
.keyfacts div:last-child{border-right:none}
.keyfacts .n{font-family:'Oswald';font-weight:700;font-size:1.9rem;color:var(--blue);line-height:1}
.keyfacts .l{font-size:.82rem;color:var(--muted);margin-top:6px}
.faq{margin-top:30px}
.faq details{border:1px solid var(--line);border-radius:8px;padding:0 20px;margin-bottom:12px;background:var(--paper)}
.faq summary{cursor:pointer;font-family:'Oswald';font-weight:500;font-size:1.05rem;color:var(--navy);padding:16px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--blue);font-size:1.3rem;font-weight:700}
.faq details[open] summary::after{content:"–"}
.faq details[open] summary{border-bottom:1px solid var(--line)}
.faq .fa{padding:14px 0 18px;color:var(--muted);font-size:.97rem}
.article-cta{margin-top:34px;padding-top:26px;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.article-cta p{margin:0;font-family:'Oswald';font-weight:500;text-transform:uppercase;letter-spacing:.03em;color:var(--navy);font-size:1.05rem}

/* ---------- Footer ---------- */
footer{background:var(--navy);color:#B8BABE;padding:44px 0}
.foot{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.foot .logo b{color:#fff}
.foot .logo span{color:#AFB2B7}
.foot small{font-size:.82rem;line-height:1.6}
.foot .req{font-size:.78rem;color:#8B8E93;margin-top:8px}

/* ---------- Responsive ---------- */
@media(max-width:1000px){
  .burger{display:block}
  .menu{
    display:none;position:absolute;top:74px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--white);border-bottom:1px solid var(--line);
    box-shadow:0 22px 30px -22px rgba(30,32,36,.45);padding:6px 0 14px;
  }
  header.open .menu{display:flex}
  .menu nav{display:flex;flex-direction:column;gap:0;width:100%}
  .menu nav a{padding:14px 24px;font-size:1.02rem;border-bottom:1px solid var(--line-soft)}
  .menu .head-cta{display:flex;flex-direction:column;align-items:stretch;gap:12px;padding:16px 24px 0}
  .menu .head-cta .phone{font-size:1.18rem}
  .menu .head-cta .btn{justify-content:center;padding:14px 20px}

  .hero-inner{grid-template-columns:1fr;gap:40px}
  .svc-grid{grid-template-columns:repeat(2,1fr)}
  .adv-grid{grid-template-columns:repeat(2,1fr)}
  .proc-grid{grid-template-columns:repeat(2,1fr);gap:22px}
  .step{border-top:none}.step::before{width:60px}
  .cont-grid{grid-template-columns:1fr;gap:40px}
}
@media(max-width:640px){
  .wrap{padding:0 20px}
  .reader,.toc,.article{padding-left:16px;padding-right:16px}
  section{padding:64px 0}
  .hero-inner{padding:64px 0 54px}
  .hero h1{font-size:clamp(2.1rem,8vw,3rem)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat{border-bottom:1px solid var(--line)}
  .stat:nth-child(2){border-right:none}
  .svc-grid,.adv-grid,.proc-grid{grid-template-columns:1fr}
  .band .wrap{flex-direction:column;align-items:flex-start;text-align:left}
  .hero-actions .btn{flex:1;justify-content:center}
  .article-body{padding:32px 20px 40px}
  .article-cta{flex-direction:column;align-items:stretch}
  .article-cta .btn{justify-content:center}
  .foot{flex-direction:column;align-items:flex-start;gap:16px}
  .keyfacts{grid-template-columns:1fr}
  .keyfacts div{border-right:none;border-bottom:1px solid var(--line)}
  .keyfacts div:last-child{border-bottom:none}
  .article-media{aspect-ratio:16/9}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto}
}
