:root{
  --blue:#0b3d91;
  --blue-dark:#082c6b;
  --blue-light:#e8f0fc;
  --blue-mid:#1e63d0;
  --text:#1b2537;
  --muted:#5b6b85;
  --border:#dbe4f2;
  --white:#ffffff;
  --radius:10px;
  --shadow:0 2px 10px rgba(11,61,145,.08);
}

*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:"Segoe UI",Roboto,Arial,sans-serif;
  color:var(--text);
  background:var(--white);
  line-height:1.6;
}
img{max-width:100%;display:block;}
a{color:var(--blue-mid);text-decoration:none;}
a:hover{text-decoration:underline;}

.container{max-width:1320px;margin:0 auto;padding:0 24px;}

/* ===== Шапка ===== */
.site-header{
  background:linear-gradient(135deg,var(--blue-dark) 0%,var(--blue) 60%,var(--blue-mid) 100%);
  color:#fff;
  position:sticky;top:0;z-index:100;
  box-shadow:0 2px 12px rgba(8,44,107,.35);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:84px;}
.brand{display:flex;align-items:center;gap:14px;color:#fff;}
.brand:hover{text-decoration:none;}
.brand-logo{
  width:56px;height:56px;border-radius:50%;
  background:rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:center;
  flex-shrink:0;overflow:hidden;
}
.brand-logo img{width:44px;height:44px;object-fit:contain;}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{font-size:1.05rem;letter-spacing:.4px;}
.brand-text span{font-size:.8rem;opacity:.85;}

.main-nav ul{display:flex;list-style:none;gap:6px;}
.main-nav a{
  color:#fff;font-weight:600;font-size:.95rem;
  padding:10px 16px;border-radius:6px;
  transition:background .2s;
}
.main-nav a:hover,.main-nav a.active{background:rgba(255,255,255,.15);text-decoration:none;}

.nav-toggle{
  display:none;flex-direction:column;gap:5px;
  background:none;border:none;cursor:pointer;padding:8px;
}
.nav-toggle span{width:26px;height:3px;background:#fff;border-radius:2px;transition:.25s;}
.nav-toggle.open span:nth-child(1){transform:translateY(8px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-8px) rotate(-45deg);}

/* ===== Hero ===== */
.hero{
  background:linear-gradient(135deg,var(--blue-dark),var(--blue-mid));
  color:#fff;padding:88px 0;
}
.hero-inner{max-width:720px;}
.hero .kicker{
  display:inline-block;font-size:.8rem;font-weight:700;
  letter-spacing:1.5px;text-transform:uppercase;
  background:rgba(255,255,255,.15);padding:6px 14px;border-radius:20px;
  margin-bottom:18px;
}
.hero h1{font-size:2.4rem;line-height:1.2;margin-bottom:16px;}
.hero p{font-size:1.1rem;opacity:.92;max-width:600px;}
.hero .btn-row{margin-top:30px;display:flex;gap:14px;flex-wrap:wrap;}
.btn{
  display:inline-block;padding:12px 28px;border-radius:8px;
  font-weight:700;font-size:.95rem;transition:.2s;
}
.btn:hover{text-decoration:none;transform:translateY(-2px);}
.btn-light{background:#fff;color:var(--blue);}
.btn-outline{border:2px solid rgba(255,255,255,.7);color:#fff;}
.btn-outline:hover{background:rgba(255,255,255,.12);}
.btn-blue{background:var(--blue);color:#fff;}
.btn-blue:hover{background:var(--blue-mid);}

/* ===== Секции ===== */
.section{padding:72px 0;}
.section-tinted{background:var(--blue-light);}
.section-head{margin-bottom:40px;}
.section-head .label{
  color:var(--blue-mid);font-weight:700;font-size:.8rem;
  letter-spacing:1.5px;text-transform:uppercase;
}
.section-head h2{font-size:1.9rem;color:var(--blue-dark);margin-top:6px;}

.about-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:48px;align-items:start;}
.about-grid p{margin-bottom:14px;color:#33415c;}
.about-facts{list-style:none;}
.about-facts li{
  background:#fff;border:1px solid var(--border);border-left:4px solid var(--blue);
  border-radius:8px;padding:16px 20px;margin-bottom:12px;box-shadow:var(--shadow);
}
.about-facts strong{display:block;color:var(--blue-dark);font-size:1.05rem;}

/* ===== Проекты ===== */
.projects-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.project-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:28px 22px;box-shadow:var(--shadow);
  transition:transform .2s,box-shadow .2s;
}
.project-card:hover{transform:translateY(-4px);box-shadow:0 8px 22px rgba(11,61,145,.15);}
.project-icon{
  width:52px;height:52px;border-radius:12px;
  background:var(--blue-light);color:var(--blue);
  display:flex;align-items:center;justify-content:center;
  font-size:1.5rem;font-weight:800;margin-bottom:16px;
}
.project-card h3{font-size:1.05rem;color:var(--blue-dark);margin-bottom:8px;}
.project-card p{font-size:.9rem;color:var(--muted);}



/* ===== Подвал ===== */
.site-footer{background:var(--blue-dark);color:#cfe0fb;padding:48px 0 24px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr .9fr .9fr;gap:32px;margin-bottom:32px;}
.site-footer h4{color:#fff;margin-bottom:14px;font-size:1rem;}
.site-footer p,.site-footer li{font-size:.9rem;}
.site-footer ul{list-style:none;}
.site-footer li{margin-bottom:8px;}
.site-footer a{color:#cfe0fb;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.15);padding-top:18px;
  font-size:.8rem;text-align:center;opacity:.75;
}

/* ===== Адаптив ===== */
@media (max-width:960px){
  .footer-grid{grid-template-columns:repeat(2,1fr);}
  .projects-grid{grid-template-columns:repeat(2,1fr);}
  .about-grid,.footer-grid{grid-template-columns:1fr;}
}
@media (max-width:680px){
  .nav-toggle{display:flex;}
  .main-nav{
    display:none;position:absolute;top:100%;left:0;right:0;
    background:var(--blue-dark);box-shadow:0 10px 20px rgba(0,0,0,.25);
  }
  .main-nav.open{display:block;}
  .main-nav ul{flex-direction:column;padding:10px 0;}
  .main-nav a{display:block;padding:14px 24px;border-radius:0;}
  .hero{padding:60px 0;}
  .hero h1{font-size:1.7rem;}
  .section{padding:52px 0;}
  .projects-grid{grid-template-columns:1fr;}
  .brand-text span{display:none;}
}

/* ===== Сотрудники в карточках контактов ===== */
.contact-person{
  border-top:1px solid var(--border);
  padding-top:8px;margin-top:8px;width:100%;
}
.person-role{
  font-size:.7rem;font-weight:700;color:var(--blue);
  text-transform:uppercase;letter-spacing:.4px;margin-bottom:2px;line-height:1.35;
}
.person-name{font-size:.88rem;font-weight:600;color:var(--text);margin-bottom:2px;}
.contact-card--main .contact-person{border-top-color:rgba(255,255,255,.25);}
.contact-card--main .person-role{color:#bcd3f7;}
.contact-card--main .person-name{color:#fff;}
.contact-card--city .contact-person{border-top-color:rgba(255,255,255,.25);}
.contact-card--city .person-role{color:#bcd3f7;}
.contact-card--city .person-name{color:#fff;}

/* ===== Выпадающее меню «Контакты» ===== */
.main-nav li{position:relative;}
.main-nav li.has-drop .drop-menu{
  display:none;position:absolute;top:100%;left:0;min-width:280px;
  background:var(--blue-dark);list-style:none;padding:8px 0;flex-direction:column;
  border-radius:0 0 8px 8px;box-shadow:0 10px 20px rgba(0,0,0,.25);z-index:200;
}
.main-nav li.has-drop:hover .drop-menu,
.main-nav li.has-drop:focus-within .drop-menu{display:block;}
.main-nav li.has-drop .drop-menu a{
  display:block;padding:10px 20px;border-radius:0;white-space:nowrap;
  font-size:.9rem;font-weight:600;
}
.main-nav li.has-drop .drop-menu a:hover{background:rgba(255,255,255,.15);text-decoration:none;}
[id]{scroll-margin-top:100px;}
/* ===== Колонка «Социальные сети» в футере ===== */
.footer-soc-list{display:flex;gap:14px;list-style:none;}
.footer-soc-list a{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,.1);transition:background .2s,transform .2s;}
.footer-soc-list a:hover{background:rgba(255,255,255,.25);transform:translateY(-2px);}
.footer-soc-list img{width:20px;height:20px;}
@media (max-width:680px){
  .main-nav li.has-drop .drop-menu{display:none !important;}
}



/* Панель вкладок — скрыта по умолчанию, видна только на мобильных */
.tabbar{display:none;}

/* ===== Мобильная навигация: панель вкладок снизу ===== */
/* Единая сетка: фиксированная высота, равные колонки, ровное скругление */
@media (max-width:680px){
  body{padding-bottom:calc(92px + env(safe-area-inset-bottom));}
  .nav-toggle{display:none !important;}
  .main-nav{display:none !important;}
  .tabbar{
    position:fixed;
    bottom:calc(10px + env(safe-area-inset-bottom));
    left:10px;right:10px;z-index:400;
    display:flex;gap:4px;
    overflow-x:auto;scroll-snap-type:x proximity;scrollbar-width:none;
    height:60px;padding:5px;box-sizing:border-box;
    background:rgba(8,44,107,.92);
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    border:1px solid rgba(255,255,255,.12);
    border-radius:18px;
    box-shadow:0 10px 30px rgba(3,15,40,.45);
  }
  .tabbar a{
    display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
    flex:0 0 66px;height:100%;margin:0;padding:0 2px;scroll-snap-align:center;
    border-radius:12px;color:#9fb6dd;text-decoration:none;
    font-size:.58rem;font-weight:700;letter-spacing:.3px;line-height:1;
    white-space:nowrap;overflow:hidden;
    transition:color .2s,background .2s,transform .15s;
  }
  .tabbar a span{max-width:100%;overflow:hidden;text-overflow:ellipsis;}
  .tabbar a:active{transform:scale(.94);}
  .tabbar a svg{
    width:21px;height:21px;flex-shrink:0;fill:currentColor;
    transition:transform .2s;
  }
  .tabbar a.active{
    color:#fff;
    background:rgba(255,255,255,.14);
  }
  .tabbar::-webkit-scrollbar{display:none;}
  .tabbar a.active svg{transform:translateY(-1px);}
  .tabbar a.tab-press{
    color:#fff;font-weight:800;
    background:linear-gradient(135deg,#00b45a,#7dffb0);
    box-shadow:0 3px 12px rgba(0,180,90,.4);
  }
  .tabbar a.tab-press.active{
    box-shadow:0 3px 14px rgba(0,180,90,.6),0 0 0 1.5px rgba(200,255,221,.6);
  }
}


/* ===== Герой-баннеры разделов ===== */
.bp-hero{
  position:relative;min-height:440px;display:flex;align-items:flex-end;
  background:
    radial-gradient(800px 400px at 85% -80px, rgba(255,255,255,.14), transparent 60%),
    linear-gradient(135deg,#082c6b 0%,#0b3d91 55%,#1e63d0 100%);
  border-radius:0 0 26px 26px;overflow:hidden;
}
.bp-hero::after{content:"";position:absolute;right:-100px;top:-100px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.12),transparent 70%);}
.bp-hero-in{position:relative;z-index:2;width:100%;padding:0 24px 44px;}
.bp-hero-in>.wrap{max-width:1320px;margin:0 auto;}
.bp-chip{display:inline-block;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.25);
  color:#fff;font-weight:800;font-size:.78rem;letter-spacing:1.5px;
  padding:8px 18px;border-radius:999px;margin-bottom:14px;}
.bp-hero h1{color:#fff;font-size:2.4rem;letter-spacing:.3px;margin-bottom:10px;text-shadow:0 2px 12px rgba(0,0,0,.25);}
.bp-hero p{color:#dbe7ff;font-size:1.02rem;max-width:560px;margin-bottom:22px;}
.bp-btn{display:inline-block;background:linear-gradient(135deg,#ffffff,#dbe9ff);color:var(--blue);
  font-weight:800;font-size:.92rem;letter-spacing:.5px;padding:13px 30px;border-radius:12px;
  text-decoration:none;box-shadow:0 10px 26px rgba(2,20,60,.35);transition:all .2s;margin:0 10px 8px 0;}
.bp-btn:hover{transform:translateY(-2px);box-shadow:0 14px 32px rgba(2,20,60,.45);text-decoration:none;}
@media (max-width:680px){
  .bp-hero{min-height:340px;}
  .bp-hero h1{font-size:1.7rem;}
  .bp-btn{display:block;margin:0 0 10px;text-align:center;}
}


/* Компактное меню: добавлен раздел «Студенческие отряды» */
@media (max-width:1180px){
  .main-nav a{padding:9px 12px;font-size:.9rem;}
}