/* =========================================================
   РеалБетон — дизайн-система
   ========================================================= */

:root {
  --primary: #1B3A5C;
  --primary-dark: #142B45;
  --accent: #F97316;
  --accent-hover: #EA580C;
  --bg: #FFFFFF;
  --bg-alt: #F3F4F6;
  --text: #1F2937;
  --text-secondary: #6B7280;
  --border: #E5E7EB;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.06);
  --radius: 12px;
  --radius-btn: 8px;
  --transition: 0.25s ease;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  font-family: 'Inter', 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Inter', 'Montserrat', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  color: var(--primary);
  margin-bottom: 1rem;
}

h1 { font-size: 42px; font-weight: 700; }
h2 { font-size: 32px; font-weight: 700; }
h3 { font-size: 24px; font-weight: 600; }

p { color: var(--text); }

.text-secondary { color: var(--text-secondary) !important; }

.section {
  padding: 88px 0;
}
.section-alt {
  background: var(--bg-alt);
}

.section-title {
  text-align: center;
  margin-bottom: 12px;
}
.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 48px;
}

/* ============ Кнопки ============ */
.btn {
  font-weight: 600;
  border-radius: var(--radius-btn);
  padding: 14px 32px;
  transition: all var(--transition);
  border: 2px solid transparent;
}

.btn-accent {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-accent:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 10px 22px rgba(249, 115, 22, 0.32);
}

.btn-primary-dark {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary-dark:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
}

.btn-outline-light {
  border-color: #fff;
  color: #fff;
  background: transparent;
}
.btn-outline-light:hover {
  background: #fff;
  color: var(--primary);
  transform: translateY(-2px);
}

/* ============ HEADER ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: transparent;
  transition: all var(--transition);
  padding: 16px 0;
}
.site-header.scrolled {
  background: #fff;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  padding: 10px 0;
}
.site-header .navbar-brand {
  font-weight: 800;
  font-size: 24px;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
}
.site-header.scrolled .navbar-brand {
  color: var(--primary);
}
.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}
.site-header .nav-link {
  color: rgba(255, 255, 255, 0.9);
  font-weight: 500;
  padding: 8px 14px !important;
  transition: color var(--transition);
}
.site-header .nav-link:hover { color: var(--accent); }
.site-header.scrolled .nav-link { color: var(--text); }
.site-header.scrolled .nav-link:hover { color: var(--accent); }

.header-phone {
  color: #fff;
  font-weight: 700;
  font-size: 18px;
  white-space: nowrap;
}
.site-header.scrolled .header-phone { color: var(--primary); }
.header-phone:hover { color: var(--accent); text-decoration: none; }

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}
.header-cta {
  padding: 11px 24px;
  font-size: 15px;
}

/* ============ HERO SLIDER ============ */
.hero {
  position: relative;
  min-height: 90vh;
  margin-top: -84px; /* компенсируем высоту шапки */
  overflow: hidden;
}
.hero-slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 0.9s ease;
}
.hero-slide.active { opacity: 1; }
.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(27, 58, 92, 0.85);
}
.hero-content {
  position: relative;
  z-index: 2;
  min-height: 90vh;
  display: flex;
  align-items: center;
  color: #fff;
}
.hero-content .hero-badge {
  display: inline-block;
  background: rgba(249, 115, 22, 0.16);
  border: 1px solid rgba(249, 115, 22, 0.5);
  color: var(--accent);
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 50px;
  margin-bottom: 20px;
}
.hero-content h1 {
  color: #fff;
  font-size: 52px;
  margin-bottom: 20px;
}
.hero-content .hero-sub {
  color: rgba(255, 255, 255, 0.85);
  font-size: 18px;
  max-width: 620px;
  margin-bottom: 32px;
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-slide-captions { position: relative; }
.hero-caption {
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
  transition: opacity 0.6s ease;
  pointer-events: none;
}
.hero-caption.active {
  position: relative;
  opacity: 1;
  pointer-events: auto;
}

.hero-nav {
  position: absolute;
  z-index: 3;
  bottom: 36px;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 18px;
}
.hero-dots { display: flex; gap: 10px; }
.hero-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  border: none;
  cursor: pointer;
  padding: 0;
  transition: all var(--transition);
}
.hero-dot.active { background: var(--accent); transform: scale(1.35); }
.hero-arrow {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font-size: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
}
.hero-arrow:hover { background: var(--accent); border-color: var(--accent); }

/* ============ Таблицы ============ */
.price-table {
  width: 100%;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border-collapse: separate;
  border-spacing: 0;
}
.price-table thead th {
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  padding: 16px 18px;
  text-align: left;
  border: none;
  font-size: 16px;
}
.price-table tbody td {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  font-weight: 500;
}
.price-table tbody tr:nth-child(even) td {
  background: #F9FAFB;
}
.price-table tbody tr:hover td {
  background: rgba(249, 115, 22, 0.06);
}
.price-table .price-accent {
  color: var(--accent);
  font-weight: 700;
  white-space: nowrap;
}
.table-note {
  margin-top: 14px;
  color: var(--text-secondary);
  font-size: 14px;
}
.table-scroll { overflow-x: auto; }

/* ============ Калькулятор ============ */
.calculator-wrap {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 40px;
}
.calc-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 28px;
  border-bottom: 2px solid var(--bg-alt);
  padding-bottom: 0;
}
.calc-tab {
  border: none;
  background: transparent;
  padding: 12px 20px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition);
}
.calc-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}
.calc-tab:hover { color: var(--accent); }
.form-control {
  border-radius: 8px;
  border: 1px solid var(--border);
  padding: 12px 16px;
  height: auto;
  font-size: 16px;
}
.form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.15);
}
.calc-result {
  display: none;
  margin-top: 28px;
  background: var(--bg-alt);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  padding: 20px 24px;
  animation: fadeUp 0.5s ease;
}
.calc-result.show { display: block; }
.calc-result .result-val {
  font-size: 26px;
  font-weight: 800;
  color: var(--primary);
}
.calc-result .result-price {
  font-size: 26px;
  font-weight: 800;
  color: var(--accent);
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============ Chips (теги) ============ */
.chip {
  display: inline-block;
  background: #fff;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 16px;
  border-radius: 50px;
  margin: 0 8px 10px 0;
  font-weight: 500;
  transition: all var(--transition);
}
.chip:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.chip-more {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  cursor: pointer;
}
.chip-more:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.chip-hidden { display: none; }

/* ============ Карточки преимуществ ============ */
.feature-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 32px 28px;
  height: 100%;
  transition: all var(--transition);
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.1);
}
.feature-icon {
  width: 62px;
  height: 62px;
  border-radius: 14px;
  background: rgba(249, 115, 22, 0.12);
  color: var(--accent);
  font-size: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.feature-card h3 { font-size: 20px; margin-bottom: 10px; }
.feature-card p { color: var(--text-secondary); margin-bottom: 0; font-size: 15px; }

/* ============ Производство (2 колонки) ============ */
.production-block {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  color: #fff;
  padding: 64px 48px;
  background-size: cover;
  background-position: center;
}
.production-block::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(27, 58, 92, 0.8);
}
.production-block > * { position: relative; z-index: 1; }
.production-block h3, .production-block h2 { color: #fff; }
.production-block p { color: rgba(255, 255, 255, 0.85); }

/* ============ Аккордеон ============ */
.accordion-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 12px;
  overflow: hidden;
}
.accordion-btn {
  width: 100%;
  background: #fff;
  border: none;
  text-align: left;
  padding: 20px 24px;
  font-weight: 600;
  font-size: 17px;
  color: var(--text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  transition: color var(--transition);
}
.accordion-btn:hover { color: var(--accent); }
.accordion-btn .acc-icon {
  flex-shrink: 0;
  transition: transform var(--transition);
  color: var(--accent);
  font-size: 20px;
}
.accordion-item.open .acc-icon { transform: rotate(180deg); }
.accordion-body {
  display: none;
  padding: 0 24px 22px;
  color: var(--text-secondary);
}
.accordion-item.open .accordion-body { display: block; }

/* ============ CTA блок ============ */
.cta-block {
  background: var(--primary);
  border-radius: var(--radius);
  padding: 64px 48px;
  color: #fff;
}
.cta-block h2 { color: #fff; }
.cta-block p { color: rgba(255, 255, 255, 0.85); }
.cta-form .form-control {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.25);
  color: #fff;
}
.cta-form .form-control::placeholder { color: rgba(255, 255, 255, 0.5); }
.cta-form .form-control:focus {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border-color: var(--accent);
}

/* ============ Футер ============ */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.8);
  padding: 60px 0 30px;
}
.site-footer .footer-brand {
  color: #fff;
  font-weight: 800;
  font-size: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.site-footer h5 {
  color: #fff;
  font-size: 16px;
  margin-bottom: 18px;
}
.site-footer a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: color var(--transition);
}
.site-footer a:hover { color: var(--accent); text-decoration: none; }
.footer-link { display: block; margin-bottom: 10px; }
.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
}
.footer-contact-item i { color: var(--accent); font-size: 20px; margin-top: 2px; }
.social-icon {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-right: 10px;
  transition: all var(--transition);
}
.social-icon:hover { background: var(--accent); color: #fff; transform: translateY(-3px); }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 40px;
  padding-top: 24px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
}

/* ============ Toast ============ */
.toast-wrap {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 2000;
}
.toast-msg {
  background: #16a34a;
  color: #fff;
  padding: 16px 22px;
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  margin-bottom: 12px;
  font-weight: 600;
  animation: fadeUp 0.4s ease;
  display: none;
}
.toast-msg.show { display: block; }

/* ============ Мобильное меню ============ */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -320px;
  width: 300px;
  height: 100vh;
  background: #fff;
  z-index: 2001;
  box-shadow: -6px 0 30px rgba(0, 0, 0, 0.15);
  transition: right 0.35s ease;
  padding: 24px;
  overflow-y: auto;
}
.mobile-menu.open { right: 0; }
.mobile-menu .close-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  border: none;
  background: transparent;
  font-size: 28px;
  color: var(--text);
  cursor: pointer;
}
.mobile-menu .nav-link {
  color: var(--text);
  font-weight: 600;
  padding: 12px 0;
  font-size: 18px;
  border-bottom: 1px solid var(--bg-alt);
}
.mobile-menu .nav-link:hover { color: var(--accent); }
.mobile-menu .header-phone { color: var(--primary); }
.mobile-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 2000;
  display: none;
}
.mobile-overlay.show { display: block; }
.burger-btn {
  display: none;
  border: none;
  background: transparent;
  color: #fff;
  font-size: 30px;
  cursor: pointer;
  padding: 0;
  line-height: 1;
}
.site-header.scrolled .burger-btn { color: var(--primary); }

/* ============ Адаптив ============ */
@media (max-width: 991px) {
  .desktop-nav { display: none; }
  .header-cta { display: none; }
  .burger-btn { display: block; }
  .section { padding: 40px 0; }
  h1 { font-size: 34px; }
  h2 { font-size: 28px; }
  .hero-content h1 { font-size: 36px; }
  .hero { min-height: 82vh; }
  .hero-content { min-height: 82vh; }
  .calculator-wrap { padding: 24px 20px; }
  .production-block { padding: 40px 28px; }
  .cta-block { padding: 40px 28px; }
}
@media (max-width: 575px) {
  .header-phone { font-size: 15px; }
  .hero-content h1 { font-size: 30px; }
  .hero-btns .btn { width: 100%; text-align: center; }
  .section-title { font-size: 24px; }
}