/* ============================================================
   IT Решения — одностраничный сайт
   Палитра: тёмно-синий (navy) + синий акцент, белые секции
   ============================================================ */

:root{
  --navy-900:#0a1b33;
  --navy-800:#0f2540;
  --navy-700:#163358;
  --ink:#0f2540;
  --ink-soft:#3b4a63;
  --muted:#647488;
  --line:#e6ebf2;
  --bg:#ffffff;
  --bg-alt:#f5f8fc;
  --accent:#1f6fe5;
  --accent-dark:#1559bf;
  --accent-soft:#e8f1ff;
  --green:#16a34a;
  --radius:14px;
  --radius-lg:20px;
  --shadow-sm:0 1px 2px rgba(15,37,64,.06), 0 1px 3px rgba(15,37,64,.05);
  --shadow:0 10px 30px -12px rgba(15,37,64,.18);
  --shadow-lg:0 24px 60px -20px rgba(15,37,64,.30);
  --container:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  margin:0;
  font-family:'Manrope',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
.icon{flex:none}

.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:24px}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* ============================================================
   HEADER
   ============================================================ */
.header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(12px);
  -webkit-backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .3s var(--ease),background .3s var(--ease);
}
.header.scrolled{box-shadow:var(--shadow-sm)}
.header__inner{display:flex;align-items:center;gap:24px;height:74px}
.logo{flex:none;display:block}
.logo__img{height:42px;width:auto;display:block}

.nav{display:flex;align-items:center;gap:6px;margin-inline:auto}
.nav__link{
  position:relative;
  padding:8px 14px;
  font-size:.95rem;font-weight:600;
  color:var(--ink-soft);
  border-radius:8px;
  transition:color .2s,background .2s;
}
.nav__link:hover{color:var(--accent)}
.nav__link.active{color:var(--accent)}
.nav__link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--accent);border-radius:2px;
}

.header__phone{
  display:inline-flex;align-items:center;gap:8px;
  font-weight:800;font-size:1.02rem;
  color:var(--accent);
  white-space:nowrap;
  transition:color .2s;
}
.header__phone:hover{color:var(--accent-dark)}

.burger{display:none;flex-direction:column;gap:5px;width:42px;height:42px;margin-left:auto;
  align-items:center;justify-content:center;background:none;border:0;cursor:pointer}
.burger span{width:22px;height:2px;background:var(--ink);border-radius:2px;transition:.3s var(--ease)}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ============================================================
   HERO
   ============================================================ */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(31,111,229,.28), transparent 60%),
    radial-gradient(900px 500px at 0% 120%, rgba(31,111,229,.18), transparent 60%),
    linear-gradient(180deg,var(--navy-800),var(--navy-900));
  color:#fff;
  padding:84px 0 92px;
}
.hero::before{
  content:"";position:absolute;inset:0;opacity:.5;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.07) 1px,transparent 1px);
  background-size:26px 26px;
}
.hero__inner{position:relative;max-width:880px}
.hero__eyebrow{
  display:inline-block;margin:0 0 18px;
  padding:7px 14px;border-radius:999px;
  background:rgba(255,255,255,.10);
  border:1px solid rgba(255,255,255,.16);
  font-size:.85rem;font-weight:600;letter-spacing:.02em;
  color:#cfe0ff;
}
.hero__title{
  margin:0 0 20px;
  font-size:clamp(2rem,5vw,3.5rem);
  line-height:1.08;font-weight:800;letter-spacing:-.02em;
}
.hero__lead{
  margin:0 0 34px;max-width:680px;
  font-size:clamp(1.05rem,1.6vw,1.25rem);
  color:#c4d2e8;
}

.hero__cta{display:flex;flex-wrap:wrap;align-items:center;gap:18px;margin-bottom:34px}
.call-link{
  display:inline-flex;align-items:center;gap:14px;
  padding:14px 22px;border-radius:14px;
  background:#fff;color:var(--navy-800);
  box-shadow:var(--shadow);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease);
}
.call-link:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.call-link .icon{color:var(--green)}
.call-link span{display:flex;flex-direction:column;line-height:1.15}
.call-link__label{font-size:.78rem;font-weight:600;color:var(--muted)}
.call-link__num{font-size:1.3rem;font-weight:800;letter-spacing:-.01em}
.hero__hours{margin:0;color:#9fb2d0;font-size:.95rem;font-weight:600}

.hero__features{display:flex;flex-wrap:wrap;gap:10px 22px}
.hero__features li{
  position:relative;padding-left:20px;
  color:#dbe6f7;font-weight:600;font-size:.95rem;
}
.hero__features li::before{
  content:"";position:absolute;left:0;top:7px;width:11px;height:11px;border-radius:50%;
  background:linear-gradient(135deg,var(--accent),#5aa3ff);
}

/* ============================================================
   STATS
   ============================================================ */
.stats{
  background:var(--bg);
  border-bottom:1px solid var(--line);
  margin-top:-1px;
}
.stats__grid{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:24px;padding:46px 24px;
}
.stat{text-align:center;padding:10px}
.stat__num{
  display:block;
  font-size:clamp(2.4rem,5vw,3.4rem);font-weight:800;line-height:1;
  color:var(--navy-800);letter-spacing:-.03em;
  background:linear-gradient(135deg,var(--navy-700),var(--accent));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.stat__label{display:block;margin-top:10px;color:var(--muted);font-weight:600;font-size:.98rem}
.stat__label small{display:block;font-weight:500;color:var(--muted);opacity:.8;font-size:.85rem;margin-top:2px}

/* ============================================================
   SECTION SHELL
   ============================================================ */
.section{padding:88px 0}
.section--alt{background:var(--bg-alt)}
.section--dark{background:linear-gradient(180deg,var(--navy-800),var(--navy-900));color:#fff}
.section--dark a{color:#fff}

.section__head{max-width:720px;margin:0 auto 52px;text-align:center}
.section__head--light .section__title,.section__head--light .section__sub{color:#fff}
.section__head--light .section__sub{color:#c4d2e8}
.section__head--light .section__eyebrow{background:rgba(255,255,255,.10);border-color:rgba(255,255,255,.16);color:#cfe0ff}

.section__eyebrow{
  display:inline-block;margin:0 0 14px;padding:6px 13px;border-radius:999px;
  background:var(--accent-soft);color:var(--accent-dark);
  font-size:.8rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;
}
.section__title{
  margin:0 0 14px;font-size:clamp(1.7rem,3.4vw,2.5rem);
  font-weight:800;letter-spacing:-.02em;line-height:1.15;
}
.section__sub{margin:0;color:var(--muted);font-size:1.05rem}

/* ============================================================
   ADVANTAGES
   ============================================================ */
.adv-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:16px;
}
.adv{
  display:flex;align-items:flex-start;gap:14px;
  padding:22px;border-radius:var(--radius);
  background:#fff;border:1px solid var(--line);
  box-shadow:var(--shadow-sm);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s;
  font-weight:600;
}
.adv:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#d6e1f0}
.adv__ic{
  flex:none;width:42px;height:42px;border-radius:11px;
  display:grid;place-items:center;font-size:1.3rem;
  background:var(--accent-soft);
}

/* ============================================================
   CARDS (services / team)
   ============================================================ */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cards--team{grid-template-columns:repeat(3,1fr)}

.card{
  background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:30px;
  box-shadow:var(--shadow-sm);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#d6e1f0}

.service__ic{
  width:56px;height:56px;border-radius:14px;
  display:grid;place-items:center;color:#fff;margin-bottom:18px;
  background:linear-gradient(135deg,var(--accent),var(--navy-700));
  box-shadow:0 8px 20px -8px rgba(31,111,229,.6);
}
.service--accent{position:relative;overflow:hidden;border-color:#cfe0ff}
.service--accent::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,var(--accent-soft),#fff 60%);z-index:0}
.service--accent>*{position:relative;z-index:1}
.service--accent .service__ic{background:linear-gradient(135deg,var(--green),#0f9d58);box-shadow:0 8px 20px -8px rgba(22,163,74,.6)}
.service__title{margin:0 0 10px;font-size:1.3rem;font-weight:800;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.service p{margin:0;color:var(--ink-soft);font-size:.98rem}
.badge{
  font-size:.7rem;font-weight:700;letter-spacing:.03em;text-transform:uppercase;
  padding:4px 9px;border-radius:999px;background:var(--green);color:#fff;
}

/* ============================================================
   CASES
   ============================================================ */
.case-list{display:flex;flex-direction:column;gap:28px}
.case{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);
  gap:0;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;box-shadow:var(--shadow-sm);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease);
}
.case:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.case--rev{grid-template-columns:minmax(0,1.15fr) minmax(0,1fr)}
.case--rev .case__media{order:2}
.case--rev .case__body{order:1}

.case__media{background:var(--navy-700);min-height:280px;display:grid;place-items:center;overflow:hidden}
.case__media img{width:100%;height:100%;object-fit:cover;min-height:280px}
.case__media--wide{grid-column:auto}
.case__media--empty{
  background:linear-gradient(135deg,var(--navy-700),var(--navy-900));
}
.case__media--empty span{color:#fff;font-weight:800;font-size:1.15rem;padding:24px;text-align:center}

.case__body{padding:34px}
.case__cat{
  margin:0 0 8px;font-size:.78rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;
  color:var(--accent);
}
.case__title{margin:0 0 12px;font-size:1.45rem;font-weight:800;letter-spacing:-.01em}
.case__text{margin:0 0 18px;color:var(--ink-soft);font-size:.98rem}
.case__results{display:flex;flex-wrap:wrap;gap:10px}
.case__results li{
  padding:8px 14px;border-radius:10px;background:var(--accent-soft);color:var(--accent-dark);
  font-size:.9rem;font-weight:600;
}
.case__results strong{font-weight:800;color:var(--navy-800)}

/* ============================================================
   PRINCIPLES (dark)
   ============================================================ */
.principles__grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;counter-reset:p;
}
.principle{
  position:relative;padding:30px 26px;border-radius:var(--radius-lg);
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.10);
  transition:transform .28s var(--ease),background .28s,border-color .28s;
}
.principle:hover{transform:translateY(-4px);background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.2)}
.principle__num{
  display:inline-block;font-size:1.05rem;font-weight:800;color:var(--accent);
  background:rgba(31,111,229,.18);padding:4px 12px;border-radius:8px;margin-bottom:14px;
}
.principle__title{margin:0 0 8px;font-size:1.2rem;font-weight:800;color:#fff}
.principle p{margin:0;color:#b9c8e0}

/* ============================================================
   TEAM
   ============================================================ */
.person{display:flex;flex-direction:column}
.person__photo{
  width:100%;aspect-ratio:1/1;border-radius:var(--radius);overflow:hidden;
  margin-bottom:20px;background:var(--bg-alt);
}
.person__photo img{width:100%;height:100%;object-fit:cover}
.person__name{margin:0 0 4px;font-size:1.3rem;font-weight:800}
.person__role{margin:0 0 12px;color:var(--accent);font-weight:700;font-size:.92rem}
.person__bio{margin:0 0 20px;color:var(--ink-soft);font-size:.95rem;flex:1}

.skills{display:flex;flex-direction:column;gap:13px}
.skills li{display:flex;flex-direction:column;gap:6px}
.skills span{font-size:.85rem;font-weight:600;color:var(--ink-soft)}
.skills b{
  display:block;height:8px;border-radius:6px;background:var(--line);position:relative;overflow:hidden;
  width:100%;
}
.skills b::after{
  content:"";position:absolute;inset:0;width:0;border-radius:6px;
  background:linear-gradient(90deg,var(--accent),#5aa3ff);
  transition:width 1.2s var(--ease);
}
.skills b.fill::after{width:var(--lvl)}

/* ============================================================
   PORTFOLIO
   ============================================================ */
.works{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
}
.work{
  position:relative;display:block;border-radius:var(--radius);overflow:hidden;
  aspect-ratio:4/3;box-shadow:var(--shadow-sm);
  cursor:default;
}
.work img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.work:hover img{transform:scale(1.06)}
.work__overlay{
  position:absolute;inset:0;display:flex;flex-direction:column;justify-content:flex-end;
  gap:6px;padding:18px;
  background:linear-gradient(180deg,transparent 40%,rgba(10,27,51,.85));
  color:#fff;opacity:0;transform:translateY(8px);
  transition:opacity .3s var(--ease),transform .3s var(--ease);
}
.work:hover .work__overlay{opacity:1;transform:none}
.work__cat{font-size:.75rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:#9fc6ff}
.work__title{font-size:1rem;font-weight:700;line-height:1.3}

/* ============================================================
   CONTACTS (dark)
   ============================================================ */
.contact-block{
  display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:34px;align-items:center;
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius-lg);padding:38px;
}
.contact-phone{
  display:flex;align-items:center;gap:18px;color:#fff;
}
.contact-phone .icon{width:60px;height:60px;flex:none;color:#fff;
  display:grid;place-items:center;border-radius:16px;background:var(--green)}
.contact-phone span{display:flex;flex-direction:column;line-height:1.2}
.contact-phone__label{font-size:.9rem;color:#c4d2e8;font-weight:600}
.contact-phone__num{font-size:clamp(1.5rem,3vw,2rem);font-weight:800;letter-spacing:-.01em}
.contact-phone:hover .contact-phone__num{color:#9fc6ff}

.contact-info{display:flex;flex-direction:column;gap:18px}
.contact-info__item{display:flex;flex-direction:column;gap:2px}
.contact-info__k{font-size:.78rem;text-transform:uppercase;letter-spacing:.05em;color:#9fb2d0;font-weight:700}
.contact-info__v{color:#fff;font-weight:600;font-size:1.02rem}

/* ============================================================
   FOOTER
   ============================================================ */
.footer{background:var(--navy-900);color:#aebfd8;padding:60px 0 26px}
.footer__inner{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;
}
.footer__logo{height:42px;width:auto;margin-bottom:16px;filter:brightness(0) invert(1)}
.footer__tag{margin:0;color:#889ab5;max-width:300px}
.footer__h{color:#fff;font-size:1rem;margin:0 0 14px;font-weight:700}
.footer__col p{margin:0 0 9px;font-size:.93rem}
.footer__col a:hover{color:#fff}
.footer__bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;
  margin-top:40px;padding-top:22px;border-top:1px solid rgba(255,255,255,.08);
  font-size:.85rem;color:#7889a3;
}

/* ============================================================
   TO TOP
   ============================================================ */
.to-top{
  position:fixed;right:22px;bottom:22px;z-index:40;
  width:48px;height:48px;border-radius:50%;border:0;cursor:pointer;
  background:var(--accent);color:#fff;
  display:grid;place-items:center;
  box-shadow:var(--shadow);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),background .2s;
}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--accent-dark)}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:1024px){
  .works{grid-template-columns:repeat(3,1fr)}
  .adv-grid,.cards,.cards--team,.principles__grid{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:860px){
  .nav{
    position:fixed;inset:74px 0 auto 0;
    flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-bottom:1px solid var(--line);
    padding:10px 18px 18px;
    transform:translateY(-130%);transition:transform .35s var(--ease);
    box-shadow:var(--shadow);
    margin:0;
  }
  .nav.open{transform:none}
  .nav__link{padding:14px 8px;border-radius:0;border-bottom:1px solid var(--line);font-size:1.05rem}
  .nav__link.active::after{display:none}
  .header__phone{margin-left:auto}
  .burger{display:flex}

  .hero{padding:60px 0 70px}
  .stats__grid{grid-template-columns:1fr;gap:30px}
  .stat{border-bottom:1px solid var(--line);padding-bottom:24px}
  .stat:last-child{border-bottom:0}

  .case,.case--rev{grid-template-columns:1fr}
  .case--rev .case__media{order:1}
  .case--rev .case__body{order:2}
  .case__media,.case__media img{min-height:220px}

  .contact-block{grid-template-columns:1fr;gap:26px;padding:28px}

  .footer__inner{grid-template-columns:1fr 1fr;gap:28px}
}

@media (max-width:560px){
  .section{padding:64px 0}
  .container{padding-inline:18px}
  .works{grid-template-columns:repeat(2,1fr)}
  .adv-grid,.cards,.cards--team,.principles__grid{grid-template-columns:1fr}
  .header__phone span{display:none}
  .header__phone{background:var(--accent-soft);color:var(--accent);width:42px;height:42px;border-radius:11px;justify-content:center}
  .header__phone .icon{width:20px;height:20px}
  .call-link{width:100%}
  .case__body{padding:24px}
  .contact-phone{flex-direction:column;align-items:flex-start;gap:14px}
  .footer__inner{grid-template-columns:1fr}
}