/* ИнжСервис — инженерные системы зданий */
:root {
  --ink: #1c2634;
  --ink-2: #37424f;
  --muted: #5d6a78;
  --faint: #8b97a3;
  --line: #dfe5ec;
  --line-soft: #ebeff3;
  --bg: #ffffff;
  --bg-soft: #f4f6f9;
  --bg-navy: #152138;
  --brand: #0e5e8f;
  --brand-2: #0b4a71;
  --brand-soft: #e8f1f8;
  --accent: #e07a1f;
  --accent-2: #c9680f;
  --accent-soft: #fdf1e3;
  --ok: #1d7f4e;
  --shadow-sm: 0 1px 2px rgba(20, 32, 48, .06);
  --shadow-md: 0 6px 18px rgba(20, 32, 48, .08);
  --shadow-lg: 0 18px 40px rgba(20, 32, 48, .12);
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --container: 1160px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PT Sans", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
}
img { max-width: 100%; }
a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-2); }
p, ul, ol, figure, blockquote { margin: 0 0 1rem; }
h1, h2, h3, h4 { margin: 0 0 .75rem; line-height: 1.25; color: var(--ink); font-weight: 700; }
h1 { font-size: clamp(26px, 3.4vw, 38px); }
h2 { font-size: clamp(22px, 2.6vw, 30px); }
h3 { font-size: 20px; }
h4 { font-size: 17px; }
small { font-size: 13px; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 20px; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- helpers ---------- */
.section { padding: 56px 0; }
.section--soft { background: var(--bg-soft); }
.section--navy { background: var(--bg-navy); color: #d7e0ea; }
.section--navy h2, .section--navy h3 { color: #fff; }
.section-head { margin-bottom: 30px; }
.section-head h2 { margin-bottom: 6px; }
.section-head p { color: var(--muted); max-width: 760px; margin: 0; }
.kicker {
  display: inline-block; font-size: 13px; letter-spacing: .04em;
  text-transform: uppercase; color: var(--accent); font-weight: 700; margin-bottom: 8px;
}

.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--a { align-items: start; }

.row { display: flex; flex-wrap: wrap; gap: 20px; align-items: center; }
.spread { display: flex; flex-wrap: wrap; gap: 12px 20px; justify-content: space-between; align-items: center; }

.muted { color: var(--muted); }
.text-center { text-align: center; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; border-radius: var(--r-sm); font-weight: 600; font-size: 15px;
  border: 1px solid transparent; cursor: pointer; line-height: 1.2;
  transition: background .15s, border-color .15s, color .15s;
  text-align: center;
}
.btn--accent { background: var(--accent); color: #fff; }
.btn--accent:hover { background: var(--accent-2); color: #fff; }
.btn--brand { background: var(--brand); color: #fff; }
.btn--brand:hover { background: var(--brand-2); color: #fff; }
.btn--ghost { background: transparent; border-color: var(--line); color: var(--ink); }
.btn--ghost:hover { border-color: var(--brand); color: var(--brand); background: #fff; }
.btn--light { background: #fff; color: var(--brand); }
.btn--light:hover { background: var(--brand-soft); }
.btn--lg { padding: 14px 26px; font-size: 16px; }

/* ---------- topbar / header ---------- */
.topbar { background: var(--bg-navy); color: #c6d0dc; font-size: 13.5px; }
.topbar .container { display: flex; justify-content: space-between; gap: 16px; min-height: 36px; align-items: center; flex-wrap: wrap; padding-top: 4px; padding-bottom: 4px; }
.topbar a { color: #e6ecf3; }
.topbar a:hover { color: #fff; }
.topbar .tb-info { display: flex; gap: 22px; flex-wrap: wrap; }
.topbar .tb-info span { display: inline-flex; align-items: center; gap: 7px; }
.topbar .tb-time { color: #8fa0b2; }

.site-header {
  position: sticky; top: 0; z-index: 50; background: #fff;
  border-bottom: 1px solid var(--line-soft);
  box-shadow: var(--shadow-sm);
}
.site-header .container { display: flex; align-items: center; gap: 24px; min-height: 72px; }

.logo { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.logo__mark { width: 42px; height: 42px; border-radius: 9px; display: grid; place-items: center; }
.logo__text { line-height: 1.15; }
.logo__name { font-size: 20px; font-weight: 800; color: var(--ink); letter-spacing: -.01em; }
.logo__sub { font-size: 11.5px; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }

.nav { margin-left: auto; }
.nav__list { display: flex; list-style: none; margin: 0; padding: 0; gap: 4px; }
.nav__link {
  display: block; padding: 9px 13px; font-weight: 600; color: var(--ink-2);
  border-radius: var(--r-sm); font-size: 15px;
}
.nav__link:hover { background: var(--bg-soft); color: var(--brand); }
.nav__link[aria-current="page"] { color: var(--brand); background: var(--brand-soft); }

.header-cta { display: flex; align-items: center; gap: 18px; flex-shrink: 0; }
.header-phone { text-align: right; line-height: 1.2; }
.header-phone .n { font-size: 17px; font-weight: 800; color: var(--ink); white-space: nowrap; }
.header-phone .t { font-size: 12px; color: var(--faint); }

.burger {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 44px; height: 44px; border: 1px solid var(--line); border-radius: var(--r-sm);
  background: #fff; cursor: pointer; padding: 10px;
}
.burger span { display: block; height: 2px; background: var(--ink); border-radius: 2px; }

/* ---------- breadcrumbs ---------- */
.breadcrumbs { font-size: 13.5px; color: var(--faint); padding: 14px 0 0; }
.breadcrumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; margin: 0; padding: 0; }
.breadcrumbs li + li::before { content: "›"; margin-right: 6px; color: #c3ccd6; }
.breadcrumbs a { color: var(--muted); }
.breadcrumbs a:hover { color: var(--brand); }
.breadcrumbs [aria-current="page"] { color: var(--ink-2); font-weight: 600; }

/* ---------- page hero ---------- */
.page-hero { background: linear-gradient(180deg, #f7fafc, #eef3f8); border-bottom: 1px solid var(--line-soft); padding: 38px 0 40px; }
.page-hero h1 { margin-bottom: 10px; }
.page-hero .lead { color: var(--muted); max-width: 780px; font-size: 17px; margin: 0; }

/* ---------- hero (home) ---------- */
.hero {
  position: relative; color: #fff; overflow: hidden;
  background:
    linear-gradient(100deg, rgba(8, 22, 41, .94) 0%, rgba(9, 34, 61, .88) 45%, rgba(10, 51, 88, .74) 100%),
    repeating-linear-gradient(90deg, rgba(255,255,255,.035) 0 1px, transparent 1px 56px),
    repeating-linear-gradient(0deg, rgba(255,255,255,.03) 0 1px, transparent 1px 56px);
}
.hero__inner { display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; padding: 72px 0 84px; align-items: center; }
.hero__badge {
  display: inline-flex; gap: 8px; align-items: center; font-size: 13px; font-weight: 600;
  color: #ffd9a8; background: rgba(224,122,31,.16); border: 1px solid rgba(224,122,31,.4);
  padding: 6px 12px; border-radius: 999px; margin-bottom: 18px;
}
.hero h1 { color: #fff; font-size: clamp(28px, 4vw, 44px); letter-spacing: -.01em; margin-bottom: 16px; }
.hero p.hero__text { color: #c6d3e2; font-size: 18px; max-width: 600px; margin-bottom: 26px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; }

.hero__facts { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.hero__fact {
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.14);
  border-radius: var(--r-md); padding: 16px 18px; backdrop-filter: blur(2px);
}
.hero__fact b { display: block; font-size: 24px; color: #fff; line-height: 1.1; }
.hero__fact span { font-size: 13px; color: #a9bacb; }

/* ---------- stat strip ---------- */
.stats { border-bottom: 1px solid var(--line-soft); }
.stats__list { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 22px 10px; text-align: center; border-right: 1px solid var(--line-soft); }
.stat:last-child { border-right: 0; }
.stat b { display: block; font-size: 30px; color: var(--brand); line-height: 1.1; }
.stat span { font-size: 13.5px; color: var(--muted); }

/* ---------- cards ---------- */
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-md);
  box-shadow: var(--shadow-sm); overflow: hidden;
  display: flex; flex-direction: column;
  transition: box-shadow .18s, border-color .18s, transform .18s;
}
.card:hover { box-shadow: var(--shadow-md); border-color: #c9d3dd; transform: translateY(-2px); }
.card--link { color: inherit; }
.card--link:hover { color: inherit; }

.service-card { padding: 24px; }
.service-card__icon {
  width: 52px; height: 52px; border-radius: var(--r-sm); display: grid; place-items: center;
  background: var(--brand-soft); color: var(--brand); margin-bottom: 16px;
}
.service-card h3 { margin-bottom: 8px; font-size: 18px; }
.service-card p { color: var(--muted); font-size: 14.5px; margin-bottom: 14px; }
.service-card .more { font-weight: 700; font-size: 14px; display: inline-flex; align-items: center; gap: 6px; margin-top: auto; }
.service-card .more::after { content: "→"; transition: transform .15s; }
.service-card:hover .more::after { transform: translateX(3px); }

.project-card__body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.project-card h3 { font-size: 17px; margin-bottom: 6px; }
.project-card .proj-meta { display: grid; grid-template-columns: 1fr auto; gap: 4px 14px; font-size: 14px; margin-top: auto; padding-top: 12px; }
.project-card .proj-meta dt { color: var(--faint); }
.project-card .proj-meta dd { margin: 0; text-align: right; color: var(--ink-2); font-weight: 600; }
.project-card .proj-tag { align-self: flex-start; }
.project-card__head {
  position: relative; background: var(--bg-soft); padding: 0;
}
.project-card__head .tag-abs { position: absolute; top: 12px; left: 12px; }

/* ---------- badges / tags ---------- */
.tag {
  display: inline-block; font-size: 12px; font-weight: 700; padding: 4px 10px;
  border-radius: 999px; letter-spacing: .02em;
}
.tag--brand { background: var(--brand-soft); color: var(--brand); }
.tag--accent { background: var(--accent-soft); color: var(--accent-2); }
.tag--ok { background: #e3f3ea; color: var(--ok); }
.tag--navy { background: rgba(21,33,56,.08); color: var(--ink-2); }

/* ---------- features / checklist ---------- */
.check { list-style: none; padding: 0; margin: 0 0 1rem; }
.check li { position: relative; padding-left: 30px; margin-bottom: 10px; }
.check li::before {
  content: ""; position: absolute; left: 0; top: 3px; width: 20px; height: 20px;
  border-radius: 50%; background: var(--brand-soft) url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="%230e5e8f" stroke-width="3.4" stroke-linecap="round" stroke-linejoin="round"><polyline points="20 6 9 17 4 12"/></svg>') center / 12px no-repeat;
}
.check li b { font-weight: 700; }

.num-list { list-style: none; counter-reset: step; margin: 0; padding: 0; }
.num-list li { counter-increment: step; position: relative; padding: 0 0 26px 62px; }
.num-list li:not(:last-child)::before {
  content: ""; position: absolute; left: 21px; top: 46px; bottom: 6px; width: 1px; background: var(--line);
}
.num-list li::after {
  content: counter(step); position: absolute; left: 0; top: -2px; width: 42px; height: 42px;
  border-radius: 50%; background: var(--brand); color: #fff; font-weight: 800;
  display: grid; place-items: center; font-size: 17px;
}
.num-list h3, .num-list h4 { margin-bottom: 4px; }
.num-list p { color: var(--muted); font-size: 14.5px; margin-bottom: 0; }

/* ---------- tables ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r-md); background: #fff; box-shadow: var(--shadow-sm); }
table.tbl { width: 100%; border-collapse: collapse; font-size: 14.5px; min-width: 560px; }
.tbl caption { text-align: left; font-weight: 700; font-size: 15px; padding: 14px 18px; border-bottom: 1px solid var(--line); color: var(--ink); }
.tbl th, .tbl td { text-align: left; padding: 11px 18px; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
.tbl thead th { background: var(--bg-soft); font-size: 13px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
.tbl tbody tr:last-child td { border-bottom: 0; }
.tbl .sum { text-align: right; white-space: nowrap; font-weight: 600; }
.tbl tfoot td { font-weight: 700; background: var(--bg-soft); border-top: 2px solid var(--line); }
.tbl--zebra tbody tr:nth-child(even) { background: #fafbfc; }

/* ---------- review ---------- */
.review { background: #fff; border: 1px solid var(--line); border-radius: var(--r-md); padding: 26px; box-shadow: var(--shadow-sm); }
.review blockquote { margin: 0 0 16px; font-size: 16px; color: var(--ink-2); }
.review .author { display: flex; align-items: center; gap: 12px; }
.review .avatar {
  width: 44px; height: 44px; border-radius: 50%; background: var(--brand-soft); color: var(--brand);
  display: grid; place-items: center; font-weight: 800; font-size: 16px; flex-shrink: 0;
}
.review .author b { display: block; font-size: 14.5px; }
.review .author span { font-size: 13px; color: var(--faint); }
.review .stars { color: #f0a020; letter-spacing: 2px; margin-bottom: 10px; font-size: 14px; }

/* ---------- article / prose ---------- */
.prose { font-size: 16.5px; color: var(--ink-2); }
.prose h2 { margin-top: 40px; font-size: 24px; }
.prose h3 { margin-top: 30px; font-size: 19px; }
.prose p, .prose ul, .prose ol { margin-bottom: 1.1rem; }
.prose ul { padding-left: 22px; }
.prose li { margin-bottom: 6px; }
.prose figure { margin: 26px 0; text-align: center; }
.prose figcaption { font-size: 13px; color: var(--faint); margin-top: 8px; }
.prose blockquote {
  border-left: 3px solid var(--brand); background: var(--bg-soft); padding: 16px 20px;
  border-radius: 0 var(--r-sm) var(--r-sm) 0; color: var(--ink-2); margin: 24px 0;
}
.callout {
  display: flex; gap: 12px; background: var(--brand-soft); border: 1px solid #cfe0ee;
  border-radius: var(--r-md); padding: 16px 18px; margin: 24px 0;
}
.callout--warn { background: var(--accent-soft); border-color: #f3d7b8; }
.callout b { color: var(--brand-2); }
.callout--warn b { color: var(--accent-2); }

.article-card { padding: 20px 22px; }
.article-card .meta { font-size: 13px; color: var(--faint); display: flex; gap: 14px; margin-bottom: 8px; }
.article-card h3 { font-size: 17.5px; margin-bottom: 8px; }
.article-card p { color: var(--muted); font-size: 14.5px; margin-bottom: 12px; }
.article-card .more { font-weight: 700; font-size: 14px; }

/* ---------- forms ---------- */
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: 14px; font-weight: 600; color: var(--ink-2); }
.field label .req { color: var(--accent); }
.field input, .field textarea, .field select {
  border: 1px solid #cbd5e0; border-radius: var(--r-sm); padding: 11px 13px; font-size: 15px;
  font-family: inherit; background: #fff; color: var(--ink); width: 100%;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(14,94,143,.12);
}
.field .hint { font-size: 12.5px; color: var(--faint); }
.form-note { font-size: 13px; color: var(--faint); margin-top: 6px; }
.form-success { display: none; }
.form-success.show { display: block; }

/* ---------- contacts / info ---------- */
.contact-line { display: flex; gap: 14px; align-items: flex-start; padding: 14px 0; border-bottom: 1px solid var(--line-soft); }
.contact-line:last-child { border-bottom: 0; }
.contact-line .ic { width: 40px; height: 40px; flex-shrink: 0; border-radius: var(--r-sm); background: var(--brand-soft); color: var(--brand); display: grid; place-items: center; }
.contact-line b { display: block; color: var(--ink); }
.contact-line a { font-weight: 600; }
.contact-line .sub { font-size: 13px; color: var(--faint); }

/* ---------- sidebar ---------- */
.side { display: grid; grid-template-columns: 300px 1fr; gap: 40px; align-items: start; }
.aside-menu { list-style: none; margin: 0; padding: 0; border: 1px solid var(--line); border-radius: var(--r-md); overflow: hidden; background: #fff; }
.aside-menu li + li { border-top: 1px solid var(--line-soft); }
.aside-menu a { display: flex; justify-content: space-between; gap: 10px; padding: 12px 16px; color: var(--ink-2); font-weight: 600; font-size: 14.5px; }
.aside-menu a:hover { background: var(--bg-soft); color: var(--brand); }
.aside-menu a[aria-current="page"] { background: var(--brand); color: #fff; }
.aside-menu .cnt { color: var(--faint); font-weight: 400; }

/* ---------- pagination ---------- */
.pager { display: flex; gap: 8px; flex-wrap: wrap; }
.pager a, .pager span {
  min-width: 40px; height: 40px; display: inline-grid; place-items: center; padding: 0 6px;
  border: 1px solid var(--line); border-radius: var(--r-sm); font-weight: 600; color: var(--ink-2); font-size: 14px;
}
.pager a:hover { border-color: var(--brand); color: var(--brand); }
.pager .cur { background: var(--brand); border-color: var(--brand); color: #fff; }

/* ---------- tabs ---------- */
.tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.tab-btn {
  border: 1px solid var(--line); background: #fff; padding: 9px 16px; border-radius: 999px;
  font-weight: 600; font-size: 14px; color: var(--ink-2); cursor: pointer;
}
.tab-btn:hover { border-color: var(--brand); color: var(--brand); }
.tab-btn.is-active { background: var(--brand); border-color: var(--brand); color: #fff; }

/* ---------- documents list ---------- */
.doc-list { list-style: none; margin: 0; padding: 0; }
.doc-list li { display: flex; gap: 12px; align-items: flex-start; padding: 13px 0; border-bottom: 1px solid var(--line-soft); }
.doc-list li:last-child { border-bottom: 0; }
.doc-list .fic { width: 34px; height: 40px; background: var(--accent-soft); border-radius: 5px; display: grid; place-items: center; color: var(--accent-2); font-size: 10px; font-weight: 800; flex-shrink: 0; }
.doc-list b { display: block; font-size: 14.5px; }
.doc-list span { font-size: 12.5px; color: var(--faint); }

/* ---------- CTA band ---------- */
.cta-band { background: linear-gradient(110deg, var(--brand-2), var(--brand)); color: #fff; border-radius: var(--r-lg); padding: 38px; display: flex; gap: 24px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.cta-band h2 { color: #fff; margin-bottom: 6px; }
.cta-band p { color: #d4e3ef; margin: 0; max-width: 560px; }
.cta-band a { flex-shrink: 0; }

/* ---------- footer ---------- */
.site-footer { background: var(--bg-navy); color: #9fb0c2; font-size: 14px; margin-top: 40px; }
.site-footer a { color: #cfd9e4; }
.site-footer a:hover { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 36px; padding: 48px 0 36px; }
.footer-grid h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 9px; }
.footer-about p { font-size: 13.5px; margin-top: 12px; }
.footer-phone { font-size: 19px; font-weight: 800; color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 16px 0; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 12.5px; color: #7d8ea1; }

/* ---------- 404 ---------- */
.err { text-align: center; padding: 90px 20px 100px; }
.err .code { font-size: 110px; font-weight: 800; line-height: 1; color: var(--brand-soft); }
.err h1 { margin: 8px 0 10px; }

/* ---------- responsive ---------- */
@media (max-width: 1020px) {
  .site-header .container { flex-wrap: wrap; padding-top: 10px; padding-bottom: 10px; row-gap: 4px; }
  .nav { order: 3; width: 100%; margin-left: 0; }
  .header-cta { margin-left: auto; }
  .nav__list { flex-wrap: wrap; }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .hero__inner { grid-template-columns: 1fr; gap: 28px; padding: 52px 0 60px; }
  .side { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
}
@media (max-width: 760px) {
  .section { padding: 40px 0; }
  .burger { display: flex; }
  .nav { display: none; order: 4; width: 100%; }
  .nav.is-open { display: block; }
  .nav__list { flex-direction: column; }
  .nav__link { padding: 11px 8px; }
  .grid--2, .grid--3 { grid-template-columns: 1fr; }
  .stats__list { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(1), .stat:nth-child(2) { border-bottom: 1px solid var(--line-soft); }
  .form-row { grid-template-columns: 1fr; }
  .topbar .tb-info { gap: 8px 18px; }
  .cta-band { padding: 26px 22px; }
  .hero__actions .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
}