/* ============================================================
   ОРЛОВ К.Ю. — Техническая документация ТПА
   Design tokens: blueprint / engineering-drawing industrial theme
   ============================================================ */

:root{
  --navy-deep:   #0A2540;
  --navy-mid:    #123A5C;
  --navy-line:   #1B4A73;
  --blueprint:   #5CB3E0;
  --blueprint-dim:#3D7FA3;
  --steel:       #C7D2DB;
  --steel-pale:  #EEF2F6;
  --paper:       #F7F9FB;
  --ink:         #14202B;
  --ink-soft:    #4B5A66;
  --ok:          #2E8B57;

  --f-display: 'Montserrat', sans-serif;
  --f-body:    'Roboto', sans-serif;
  --f-mono:    'IBM Plex Mono', monospace;

  --radius: 3px;
  --maxw: 1180px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--f-body);
  color:var(--ink);
  background:var(--paper);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{font-family:var(--f-display);color:var(--navy-deep);margin:0 0 .5em;line-height:1.15;}
p{margin:0 0 1em;}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.mono{font-family:var(--f-mono);}

:focus-visible{outline:3px solid var(--blueprint);outline-offset:2px;}

/* ---------- eyebrow / doc-code labels ---------- */
.eyebrow{
  font-family:var(--f-mono);
  font-size:.78rem;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--blueprint-dim);
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:22px;height:1px;background:var(--blueprint-dim);
  display:inline-block;
}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:var(--navy-deep);
  border-bottom:1px solid var(--navy-line);
}
.site-header .container{
  display:flex;align-items:center;justify-content:space-between;
  height:76px;
}
.brand{
  display:flex;align-items:center;gap:12px;
  font-family:var(--f-display);font-weight:800;
  color:#fff;font-size:1.02rem;letter-spacing:.01em;
}
.brand-mark{
  width:38px;height:38px;flex:none;
}
.brand small{
  display:block;font-family:var(--f-mono);font-weight:400;
  font-size:.68rem;color:var(--steel);letter-spacing:.05em;text-transform:none;
}
nav.main-nav{display:flex;gap:2px;}
nav.main-nav a{
  color:var(--steel);
  font-size:.92rem;font-weight:500;
  padding:10px 14px;border-radius:var(--radius);
  transition:color .15s, background .15s;
  white-space:nowrap;
}
nav.main-nav a:hover, nav.main-nav a.active{
  color:#fff;background:rgba(92,179,224,.14);
}
.header-cta{
  display:flex;align-items:center;gap:10px;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--f-body);font-weight:600;font-size:.92rem;
  padding:12px 22px;border-radius:var(--radius);
  border:1px solid transparent;cursor:pointer;
  transition:transform .12s ease, background .15s, border-color .15s;
}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--blueprint);color:var(--navy-deep);}
.btn-primary:hover{background:#77c1e8;}
.btn-outline{background:transparent;color:#fff;border-color:var(--navy-line);}
.btn-outline:hover{border-color:var(--blueprint);color:var(--blueprint);}
.btn-dark{background:var(--navy-deep);color:#fff;}
.btn-dark:hover{background:var(--navy-mid);}
.btn-block{width:100%;}

.nav-toggle{
  display:none;background:none;border:1px solid var(--navy-line);
  border-radius:var(--radius);width:42px;height:42px;
  color:#fff;cursor:pointer;align-items:center;justify-content:center;
}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:var(--navy-deep);
  color:#fff;
  padding:76px 0 90px;
}
.hero-grid{
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(92,179,224,.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(92,179,224,.09) 1px, transparent 1px);
  background-size:44px 44px;
  mask-image:linear-gradient(to bottom, rgba(0,0,0,.9), transparent 85%);
}
.hero .container{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;}
.hero h1{color:#fff;font-size:clamp(1.9rem,3.6vw,2.85rem);max-width:19ch;}
.hero .lead{color:var(--steel);font-size:1.12rem;max-width:46ch;}
.lead-strong{
  display:flex;align-items:center;gap:10px;color:var(--blueprint);
  font-weight:600;font-size:1rem;max-width:46ch;
  padding:12px 16px;border:1px solid var(--navy-line);border-radius:var(--radius);
  background:rgba(92,179,224,.06);
}
.lead-strong svg{flex:none;color:var(--blueprint);}
.hero .sub{color:var(--steel);font-size:.98rem;opacity:.85;margin-top:-4px;}
.hero-actions{display:flex;gap:14px;margin-top:26px;flex-wrap:wrap;}
.hero-figure{position:relative;}
.hero-figure svg{width:100%;height:auto;}

/* ---------- sections ---------- */
section{padding:76px 0;}
.section-alt{background:var(--steel-pale);}
.section-navy{background:var(--navy-deep);color:#fff;}
.section-navy h2, .section-navy h3{color:#fff;}
.section-head{max-width:640px;margin-bottom:44px;}
.section-head h2{font-size:clamp(1.5rem,2.6vw,2.1rem);}
.section-head p{color:var(--ink-soft);font-size:1.02rem;}
.section-navy .section-head p{color:var(--steel);}

/* ---------- advantage / feature cards ---------- */
.cards-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.cards-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.card{
  background:#fff;border:1px solid #E1E8EE;border-radius:var(--radius);
  padding:26px 24px;position:relative;
}
.card .icon{width:40px;height:40px;color:var(--blueprint-dim);margin-bottom:16px;}
.card h3{font-size:1.02rem;margin-bottom:8px;}
.card p{color:var(--ink-soft);font-size:.94rem;margin-bottom:0;}
.card .doc-code{
  position:absolute;top:20px;right:22px;
  font-family:var(--f-mono);font-size:.72rem;color:var(--steel);
}

/* ---------- service list rows ---------- */
.service-row{
  display:grid;grid-template-columns:120px 1fr auto;gap:24px;
  align-items:center;
  padding:26px 0;border-top:1px solid #E1E8EE;
}
.service-row:last-child{border-bottom:1px solid #E1E8EE;}
.service-row .num{font-family:var(--f-mono);color:var(--blueprint-dim);font-size:.95rem;}
.service-row h3{margin-bottom:6px;font-size:1.12rem;}
.service-row p{color:var(--ink-soft);margin-bottom:0;font-size:.94rem;}

/* ---------- service detail cards (services page) ---------- */
.service-detail{
  background:#fff;border:1px solid #E1E8EE;border-radius:var(--radius);
  padding:30px 28px;display:flex;flex-direction:column;gap:14px;
}
.service-detail .meta{display:flex;gap:22px;font-family:var(--f-mono);font-size:.82rem;color:var(--ink-soft);flex-wrap:wrap;}
.service-detail .meta strong{color:var(--navy-deep);}
.service-detail ul{margin:0;padding-left:20px;color:var(--ink-soft);font-size:.92rem;}
.service-detail ul li{margin-bottom:4px;}

/* ---------- table ---------- */
.price-table{width:100%;border-collapse:collapse;background:#fff;border:1px solid #E1E8EE;}
.price-table th,.price-table td{padding:16px 20px;text-align:left;border-bottom:1px solid #E1E8EE;}
.price-table thead th{
  background:var(--navy-deep);color:#fff;font-family:var(--f-display);
  font-size:.86rem;letter-spacing:.03em;text-transform:uppercase;font-weight:600;
}
.price-table tbody tr:hover{background:var(--steel-pale);}
.price-table td.price{font-family:var(--f-mono);font-weight:600;color:var(--navy-deep);white-space:nowrap;}
.price-table td.term{font-family:var(--f-mono);color:var(--ink-soft);white-space:nowrap;}
.price-note{font-size:.88rem;color:var(--ink-soft);margin-top:16px;}

/* ---------- portfolio ---------- */
.portfolio-item{
  background:#fff;border:1px solid #E1E8EE;border-radius:var(--radius);overflow:hidden;
}
.portfolio-item .thumb{
  aspect-ratio:16/10;background:var(--navy-deep);position:relative;overflow:hidden;
}
.portfolio-item .thumb svg{position:absolute;inset:0;width:100%;height:100%;}
.portfolio-item .body{padding:22px 24px;}
.portfolio-item h3{font-size:1.02rem;}
.portfolio-item p{color:var(--ink-soft);font-size:.9rem;margin-bottom:0;}
.tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px;}
.tag{
  font-family:var(--f-mono);font-size:.72rem;color:var(--blueprint-dim);
  border:1px solid var(--blueprint-dim);border-radius:20px;padding:3px 10px;
}

/* ---------- checklist / useful page ---------- */
.checklist{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px;}
.checklist li{
  display:flex;gap:14px;align-items:flex-start;
  background:#fff;border:1px solid #E1E8EE;border-radius:var(--radius);padding:16px 18px;
}
.checklist svg{width:22px;height:22px;flex:none;color:var(--ok);margin-top:2px;}

.article-card{
  background:#fff;border:1px solid #E1E8EE;border-radius:var(--radius);padding:24px;
}
.article-card .eyebrow{margin-bottom:10px;}
.article-card p{color:var(--ink-soft);font-size:.92rem;}

/* ---------- CTA banner ---------- */
.cta-banner{
  background:var(--navy-deep);color:#fff;border-radius:var(--radius);
  padding:44px 40px;display:flex;align-items:center;justify-content:space-between;gap:30px;
  flex-wrap:wrap;position:relative;overflow:hidden;
}
.cta-banner h3{color:#fff;margin-bottom:6px;font-size:1.3rem;}
.cta-banner p{color:var(--steel);margin:0;font-size:.96rem;}

/* ---------- forms ---------- */
.lead-form{background:#fff;border:1px solid #E1E8EE;border-radius:var(--radius);padding:30px;}
.lead-form .field{margin-bottom:16px;}
.lead-form label{display:block;font-size:.86rem;font-weight:600;margin-bottom:6px;color:var(--navy-deep);}
.lead-form input, .lead-form select, .lead-form textarea{
  width:100%;padding:12px 14px;border:1px solid #CBD5DE;border-radius:var(--radius);
  font-family:var(--f-body);font-size:.94rem;background:#fff;color:var(--ink);
}
.lead-form input:focus, .lead-form select:focus, .lead-form textarea:focus{
  border-color:var(--blueprint-dim);outline:none;
}
.lead-form textarea{resize:vertical;min-height:100px;}
.form-note{font-size:.8rem;color:var(--ink-soft);margin-top:10px;}
.form-success{
  display:none;background:var(--ok);color:#fff;padding:14px 16px;border-radius:var(--radius);
  font-size:.92rem;margin-top:14px;
}

/* ---------- footer ---------- */
.site-footer{background:var(--navy-deep);color:var(--steel);padding:52px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:40px;margin-bottom:36px;}
.site-footer h4{color:#fff;font-size:.9rem;letter-spacing:.04em;text-transform:uppercase;margin-bottom:16px;}
.site-footer a{color:var(--steel);font-size:.92rem;display:block;margin-bottom:10px;}
.site-footer a:hover{color:var(--blueprint);}
.footer-bottom{
  border-top:1px solid var(--navy-line);padding-top:22px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
  font-size:.82rem;color:var(--ink-soft);
}
.footer-bottom a{display:inline;margin:0;color:var(--steel);}

/* ---------- breadcrumb / page hero (inner pages) ---------- */
.page-hero{background:var(--navy-deep);color:#fff;padding:52px 0 44px;position:relative;overflow:hidden;}
.page-hero .container{position:relative;}
.page-hero .eyebrow{color:var(--blueprint);}
.page-hero h1{color:#fff;font-size:clamp(1.6rem,3vw,2.3rem);max-width:26ch;}
.page-hero p{color:var(--steel);max-width:56ch;}

/* ---------- utility ---------- */
.stack-gap{display:flex;flex-direction:column;gap:20px;}
.center{text-align:center;}
.mt-40{margin-top:40px;}

/* ---------- responsive ---------- */
@media (max-width:980px){
  .cards-4{grid-template-columns:repeat(2,1fr);}
  .cards-3{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .hero .container{grid-template-columns:1fr;}
  .hero-figure{order:-1;max-width:340px;margin:0 auto;}
}
@media (max-width:760px){
  nav.main-nav{
    position:fixed;top:76px;left:0;right:0;bottom:0;
    background:var(--navy-deep);flex-direction:column;padding:20px;
    transform:translateX(100%);transition:transform .25s ease;
    z-index:90;overflow-y:auto;
  }
  nav.main-nav.open{transform:translateX(0);}
  nav.main-nav a{padding:14px 16px;font-size:1rem;border-bottom:1px solid var(--navy-line);}
  .nav-toggle{display:flex;}
  .header-cta .btn-outline{display:none;}
  .cards-4,.cards-3,.cards-2{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .service-row{grid-template-columns:1fr;gap:8px;}
  .service-row .num{order:-1;}
  .cta-banner{flex-direction:column;align-items:flex-start;}
  section{padding:52px 0;}
  .price-table{display:block;overflow-x:auto;}
}