/* Базовые стили */
:root{
  --primary:#2c3e50;
  --secondary:#3498db;
  --accent:#e74c3c;
  --light:#ecf0f1;
  --dark:#2c3e50;
  --gray:#95a5a6;
}
*{margin:0;padding:0;box-sizing:border-box;font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;}
html{scroll-behavior:smooth;}
body{line-height:1.6;color:#333;background-color:#f9f9f9;}
.container{width:90%;max-width:1200px;margin:0 auto;padding:0 15px;}
section{padding:80px 0;}

/* Цвета заголовков: h3 — только по местам */
h1,h2{color:var(--primary);}
.services h3,.process h3,.contacts h3{color:var(--primary);}

h1{font-size:2.5rem;line-height:1.2;}
h2{font-size:2rem;text-align:center;position:relative;padding-bottom:15px;}
h2:after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:80px;height:3px;background:var(--secondary);}
p{margin-bottom:15px;}

.btn{display:inline-block;padding:12px 30px;background:var(--secondary);color:#fff;border:none;border-radius:4px;cursor:pointer;font-size:1rem;font-weight:600;text-decoration:none;transition:all .3s ease;}
.btn:hover{background:#2980b9;transform:translateY(-3px);box-shadow:0 5px 15px rgba(0,0,0,.1);}
.btn-accent{background:var(--accent);}
.btn-accent:hover{background:#c0392b;}

/* Языковой переключатель */
.lang-switcher{display:flex;gap:10px;margin-left:30px;}
.lang-btn{background:none;border:1px solid var(--primary);padding:5px 10px;border-radius:3px;cursor:pointer;transition:all .3s;}
.lang-btn.active,.lang-btn:hover{background:var(--primary);color:#fff;}

/* Шапка */
header{background:#fff;box-shadow:0 2px 10px rgba(0,0,0,.1);position:fixed;width:100%;top:0;z-index:1000;}
.header-container{display:flex;justify-content:space-between;align-items:center;padding:15px 0;}
.logo{font-size:1.5rem;font-weight:700;color:var(--primary);text-decoration:none;}
.logo span{color:var(--secondary);}
nav ul{display:flex;list-style:none;align-items:center;}
nav li{margin-left:30px;}
nav a{text-decoration:none;color:var(--dark);font-weight:500;transition:color .3s;}
nav a:hover{color:var(--secondary);}
.mobile-menu-btn{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--primary);}

/* Главный экран */
.hero{
  background:linear-gradient(rgba(44,62,80,.8),rgba(44,62,80,.8)), url('img/bg.jpg');
  background-size:cover;background-position:center;color:#fff;text-align:center;padding:180px 0 100px;margin-top:70px;
}
.hero h1{color:#fff;font-size:2.8rem;margin-bottom:20px;}
.hero p{font-size:1.2rem;max-width:700px;margin:0 auto 30px;}

/* Услуги */
.services{background:#fff;}
.services-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:30px;margin-top:40px;}
.service-card{background:var(--light);padding:30px;border-radius:5px;text-align:center;transition:transform .3s;}
.service-card:hover{transform:translateY(-10px);}
.service-icon{font-size:2.5rem;color:var(--secondary);margin-bottom:15px;}

/* Калькулятор */
.calculator{background:#fff;}
.calculator-form{max-width:600px;margin:40px auto 0;background:var(--light);padding:30px;border-radius:5px;}
.form-group{margin-bottom:20px;}
.form-group label{display:block;margin-bottom:8px;font-weight:500;}
.form-group select,.form-group input,.form-group textarea{width:100%;padding:12px;border:1px solid #ddd;border-radius:4px;font-size:1rem;}
.calculator-result{margin-top:20px;padding:15px;background:#fff;border-radius:4px;text-align:center;display:none;}

/* Процесс */
.process{background:#f5f7fa;}
.process-steps{display:flex;justify-content:space-between;margin-top:50px;flex-wrap:wrap;}
.step{flex:1;min-width:200px;text-align:center;padding:0 15px;position:relative;}
.step-number{width:50px;height:50px;background:var(--secondary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:700;margin:0 auto 20px;}
.step:not(:last-child):after{content:'';position:absolute;top:25px;right:-10px;width:calc(100% - 70px);height:2px;background:var(--secondary);}

/* Цены */
.pricing{background:#fff;}
.pricing-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:30px;margin-top:40px;}
.pricing-card{background:#fff;border-radius:5px;overflow:hidden;box-shadow:0 5px 15px rgba(0,0,0,.05);text-align:center;transition:transform .3s;}
.pricing-card:hover{transform:translateY(-10px);}
.pricing-header{background:var(--primary);color:#fff;padding:20px;}
.pricing-header h3{color:#fff;margin:0;}
.pricing-body{padding:30px;}
.price{font-size:2rem;font-weight:700;color:var(--secondary);margin:15px 0;}

/* Контакты */
.contacts{background:#fff;}
.contact-container{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:40px;margin-top:40px;}
.contact-info{margin-bottom:30px;}
.contact-item{display:flex;align-items:center;margin-bottom:15px;}
.contact-icon{width:40px;height:40px;background:var(--secondary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;margin-right:15px;}
.contact-form{background:var(--light);padding:30px;border-radius:5px;}

/* Подвал */
footer{background:var(--primary);color:#fff;padding:50px 0 20px;}
.footer-container{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:30px;margin-bottom:30px;}
.footer-column h3{color:#fff;margin-bottom:20px;font-size:1.2rem;}
.footer-column ul{list-style:none;}
.footer-column li{margin-bottom:10px;}
.footer-column a{color:#bdc3c7;text-decoration:none;transition:color .3s;}
.footer-column a:hover{color:#fff;}
.copyright{text-align:center;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);font-size:.9rem;color:#bdc3c7;}

/* Адаптивность */
@media (max-width:768px){
  h1{font-size:2rem;}
  h2{font-size:1.7rem;}
  .header-container{flex-direction:column;padding:15px 0;}
  .logo{margin-bottom:15px;}
  nav ul{flex-direction:column;align-items:center;}
  nav li{margin:10px 0;}
  .lang-switcher{margin-left:0;margin-top:15px;}
  .hero{padding:150px 0 80px;}
  .step:not(:last-child):after{display:none;}
  .step{margin-bottom:30px;}
}
@media (max-width:576px){
  section{padding:60px 0;}
  .hero h1{font-size:1.8rem;}
  .hero p{font-size:1rem;}
}
/* Базовая шапка */
.header-container { display:flex; align-items:center; justify-content:space-between; }
.mobile-menu-btn { display:none; font-size:28px; line-height:1; background:none; border:1px solid #cbd5e1; padding:.35rem .6rem; border-radius:.5rem; }
.site-nav ul { display:flex; gap:24px; align-items:center; }

/* Мобилка */
@media (max-width: 768px) {
  .mobile-menu-btn { display:inline-flex; }
  .site-nav {
    position: fixed;
    top: 0; right: 0; bottom: 0;
    width: 78vw; max-width: 320px;
    background: #fff;
    box-shadow: -16px 0 40px rgba(0,0,0,.14);
    transform: translateX(100%);
    transition: transform .25s ease;
    padding: 84px 24px 24px;
    z-index: 1001;
  }
  .site-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
  }
  /* язык-кнопки в столбик */
  .site-nav .lang-switcher { margin-top: 12px; }
  .site-nav .lang-btn { border:1px solid #cbd5e1; padding:.3rem .6rem; border-radius:.5rem; background:#fff; }

  /* фон затемнения */
  .mobile-backdrop {
    display: none;
    position: fixed; inset: 0;
    background: rgba(0,0,0,.35);
    z-index: 1000;
  }

  /* когда меню открыто */
  body.menu-open .site-nav { transform: translateX(0); }
  body.menu-open .mobile-backdrop { display:block; }

  /* запрет прокрутки под меню */
  body.menu-open { overflow: hidden; touch-action: none; }
}