/* ==========================================================================
   Информтренд плюс (itplus.com.ru) — прототип, статическая вёрстка
   ========================================================================== */
:root{
  --bg:#1c1917;
  --bg-2:#131110;
  --paper:#f1f1ee;
  --ink:#101114;
  --accent:#030bff;
  --accent-soft:#5b64ff;
  --max:1200px;
  --font:Arial,"Helvetica Neue",Helvetica,system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
body{
  margin:0;font-family:var(--font);color:var(--paper);background:var(--bg);
  font-size:16px;line-height:1.65;
}
img{max-width:100%;height:auto;border:0}
a{color:var(--paper)}
h1,h2,h3,h4{margin:0 0 .5em;line-height:1.05;font-weight:700}
p{margin:0 0 1.1em}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---------- прогресс-полоса, как на оригинале ---------- */
.bar{position:fixed;top:0;left:0;height:3px;width:100%;background:var(--accent);
     transform:scaleX(0);transform-origin:0 50%;z-index:100}

/* ---------- Шапка ---------- */
.hdr{position:fixed;top:0;left:0;right:0;z-index:60;padding:22px 0;
     transition:background .25s ease}
.hdr.is-stuck,body.is-doc .hdr{background:rgba(19,17,16,.96);backdrop-filter:blur(6px)}
[id]{scroll-margin-top:96px}
.hdr__in{max-width:var(--max);margin:0 auto;padding:0 24px;display:flex;align-items:center;gap:30px}
.brand{font-size:15px;letter-spacing:.16em;text-transform:uppercase;text-decoration:none;opacity:.85}
.brand:hover{opacity:1}
.hdr__nav{margin-left:auto;display:flex;gap:26px}
.hdr__nav a{font-size:15px;text-decoration:none;opacity:.8}
.hdr__nav a:hover{opacity:1;color:#fff}
.mtoggle{
  width:50px;height:50px;border-radius:50%;border:0;background:var(--paper);
  display:none;align-items:center;justify-content:center;cursor:pointer;
}
.mtoggle img{width:22px}

/* ---------- Первый экран ---------- */
.hero{
  min-height:100vh;display:flex;align-items:center;position:relative;
  background:var(--bg) url(../img/hero-bg.jpg) center/cover no-repeat fixed;
}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(18,16,15,.86),rgba(18,16,15,.5))}
.hero__in{position:relative;z-index:2;max-width:var(--max);margin:0 auto;padding:150px 24px 90px;width:100%}
.hero h1{font-size:76px;max-width:14ch;margin-bottom:26px;overflow-wrap:break-word}
.hero h1.h1--sm{font-size:54px;max-width:20ch}
.hero p{font-size:17px;max-width:52ch;color:#d9d7d2}
.btn{
  display:inline-block;margin-top:14px;padding:16px 38px;border:1px solid var(--paper);
  color:var(--paper);text-decoration:none;font-size:15px;letter-spacing:.06em;
  text-transform:uppercase;transition:background .2s,color .2s;
}
.btn:hover{background:var(--paper);color:var(--ink)}
.btn--solid{background:var(--accent);border-color:var(--accent);color:#fff}
.btn--solid:hover{background:#fff;border-color:#fff;color:var(--accent)}

/* ---------- Секции ---------- */
.sec{padding:100px 0;border-top:1px solid rgba(241,241,238,.09)}
.sec__h{font-size:15px;letter-spacing:.24em;text-transform:uppercase;color:var(--accent-soft);margin:0 0 28px;font-weight:400}
.sec h2{font-size:46px;margin-bottom:30px;max-width:22ch}
.sec .lead{font-size:18px;max-width:70ch;color:#d9d7d2}

.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:2px;background:rgba(241,241,238,.12);margin-top:44px}
.tile{background:var(--bg);padding:34px 28px;min-height:190px;display:flex;align-items:flex-end;
      font-size:20px;line-height:1.3;transition:background .2s}
.tile:hover{background:#26221f}
.note{margin-top:20px;font-size:14px;color:#9d9892}

.steps{counter-reset:s;margin-top:46px;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:34px}
.step{counter-increment:s;border-top:2px solid var(--accent);padding-top:18px}
.step::before{content:"0" counter(s);display:block;font-size:14px;letter-spacing:.2em;color:var(--accent-soft);margin-bottom:10px}
.step h3{font-size:20px;margin-bottom:.5em}
.step p{font-size:15px;color:#b9b4ae;margin:0}

.stack{display:flex;gap:34px;align-items:center;flex-wrap:wrap;margin-top:34px}
.stack img{height:44px;width:auto;filter:brightness(1.05)}

.clients{display:flex;flex-wrap:wrap;gap:52px;align-items:center;margin-top:40px}
.clients img{max-height:46px;width:auto;max-width:170px;object-fit:contain;
             filter:grayscale(1) brightness(1.9);opacity:.8;transition:.2s}
.clients img:hover{filter:none;opacity:1}

.product{display:grid;grid-template-columns:1.2fr 1fr;gap:46px;align-items:center;margin-top:40px}
.product__card{background:#26221f;padding:38px 34px;border:1px solid rgba(241,241,238,.12)}
.product__card h3{font-size:26px}
.product__card .price{font-size:15px;color:var(--accent-soft);letter-spacing:.06em;margin:0 0 20px}

/* ---------- Документы (светлый лист) ---------- */
.doc{background:var(--paper);color:var(--ink);padding:120px 0 80px}
.doc__in{max-width:900px;margin:0 auto;padding:0 24px;font-size:16.5px;line-height:1.7}
.doc h1{font-size:34px;margin-bottom:.4em;line-height:1.2}
.doc .sub{text-transform:uppercase;font-size:13px;letter-spacing:.1em;color:#6a6a6a;margin-bottom:6px}
.doc .org{font-weight:700;margin-bottom:34px}
.doc h2{font-size:22px;margin:2em 0 .6em}
.doc p{margin:0 0 1em}
.doc ul{margin:0 0 1.2em;padding-left:1.3em}
.doc li{margin-bottom:.4em}
.doc a{color:#0b1fd0}
.doc figure{margin:26px 0}
.doc figure img{border:1px solid #d9d9d4}
.doc figcaption{font-size:14px;color:#6a6a6a;margin-top:8px}
.docnav{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 40px}
.docnav a{
  font-size:14px;padding:9px 16px;border:1px solid #cfcfc9;color:#101114;text-decoration:none;
}
.docnav a:hover{background:#101114;color:#fff;border-color:#101114}
.docnav a.is-current{background:#101114;color:#fff;border-color:#101114}

/* ---------- Контакты и подвал ---------- */
.contacts{
  position:relative;padding:110px 0 90px;
  background:var(--bg-2) url(../img/hero-bg.jpg) center/cover no-repeat;
}
.contacts::after{content:"";position:absolute;inset:0;background:rgba(10,9,8,.82)}
.contacts__in{position:relative;z-index:2;max-width:var(--max);margin:0 auto;padding:0 24px;
              display:grid;grid-template-columns:1fr 1.3fr;gap:50px}
.contacts h2{font-size:15px;letter-spacing:.24em;text-transform:uppercase;font-weight:400;color:var(--accent-soft)}
.contacts .big{font-size:30px;margin:14px 0 6px}
.contacts .big a{text-decoration:none}
.req{font-size:14px;line-height:1.85;color:#b3aea8}
.ftr{background:var(--bg-2);padding:26px 0;font-size:13px;color:#8d8880;letter-spacing:.04em}
.ftr__in{max-width:var(--max);margin:0 auto;padding:0 24px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}

@media (max-width:900px){
  .hero h1,.hero h1.h1--sm{font-size:42px}
  .sec h2{font-size:32px}
  .hdr__nav{display:none}
  .mtoggle{display:flex}
  .contacts__in{grid-template-columns:1fr}
  .product{grid-template-columns:1fr}
  .hero{background-attachment:scroll}
}
@media (max-width:560px){
  .hero h1,.hero h1.h1--sm{font-size:32px}
  .docnav a{font-size:13px;padding:8px 12px}
  .sec{padding:64px 0}
  .doc{padding-top:96px}
}
/* мобильное меню */
.mmenu{position:fixed;inset:0;background:rgba(19,17,16,.97);z-index:70;display:none;
       flex-direction:column;align-items:center;justify-content:center;gap:24px}
.mmenu.is-open{display:flex}
.mmenu a{font-size:24px;text-decoration:none}
.mmenu__close{position:absolute;top:24px;right:28px;background:none;border:0;color:#fff;font-size:38px;cursor:pointer}