/* ============================================================
   LAYOUT — social bar, header, footer, mobile nav
   ============================================================ */

/* --- Social Bar --- */
.social-bar {
  background: var(--blue-dark);
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-6);
  padding: 8px max(var(--space-6), var(--safe-right)) 8px max(var(--space-6), var(--safe-left));
}
.social-bar a {
  color: rgba(255, 255, 255, 0.82);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: color var(--transition);
}
.social-bar a:hover { color: #fff; }

/* --- Site Header --- */
.site-header {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  position: sticky;
  top: 0;
  z-index: 100;
  transition: box-shadow var(--transition), border-color var(--transition);
}
.site-header.is-scrolled {
  border-color: var(--gray-200);
  box-shadow: var(--shadow-header);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-3) max(var(--space-8), var(--safe-right)) var(--space-3) max(var(--space-8), var(--safe-left));
  min-height: var(--header-h);
}

.header-logo-link {
  display: flex;
  flex-shrink: 0;
}
.header-logo {
  height: 56px;
  width: auto;
  transition: opacity var(--transition);
}
.header-logo-link:hover .header-logo { opacity: 0.88; }

/* --- Main Nav --- */
.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.main-nav > a,
.main-nav .nav-link-parent {
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-700);
  text-decoration: none;
  padding: 8px var(--space-3);
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
}
.main-nav > a:hover,
.main-nav .nav-link-parent:hover,
.nav-item:hover > .nav-link-parent,
.nav-item:focus-within > .nav-link-parent {
  background: var(--gray-100);
  color: var(--blue);
}
.main-nav .btn-primary {
  margin-left: var(--space-2);
  padding: 9px 18px;
}

/* --- Equipment dropdown (desktop) --- */
.nav-item {
  position: relative;
}
.nav-link-parent {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.nav-caret {
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  opacity: 0.7;
  transition: transform var(--transition);
}
.nav-item:hover .nav-caret,
.nav-item:focus-within .nav-caret,
.mobile-nav-submenu-toggle[aria-expanded="true"] .nav-caret {
  transform: rotate(180deg);
}
.nav-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 260px;
  max-height: min(70vh, 560px);
  overflow-y: auto;
  padding: var(--space-2) 0;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  z-index: 200;
}
.nav-item:hover .nav-dropdown,
.nav-item:focus-within .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.nav-dropdown a {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-700);
  text-decoration: none;
  padding: 9px var(--space-4);
  white-space: nowrap;
  transition: background var(--transition), color var(--transition);
}
.nav-dropdown a:hover,
.nav-dropdown a:focus {
  background: var(--gray-50);
  color: var(--blue);
  outline: none;
}
.nav-dropdown-child {
  padding-left: var(--space-8) !important;
  font-weight: 400 !important;
  color: var(--gray-600) !important;
  font-size: 12px !important;
}
.nav-dropdown-child:hover,
.nav-dropdown-child:focus {
  color: var(--blue) !important;
}
.nav-dropdown-divider {
  height: 1px;
  margin: var(--space-2) 0;
  background: var(--gray-100);
}

/* --- Mobile Menu Toggle --- */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 12px;
  margin: -4px;
  border-radius: var(--radius-sm);
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}
.mobile-menu-toggle:hover { background: var(--gray-100); }
.mobile-menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--gray-700);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.mobile-menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.mobile-menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --- Mobile Nav --- */
.mobile-nav {
  background: #fff;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-md);
  max-height: calc(100dvh - var(--header-h) - 36px);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
}
.mobile-nav > a,
.mobile-nav-group-head > a,
.mobile-nav-submenu a {
  font-size: 16px;
  font-weight: 500;
  color: var(--gray-700);
  text-decoration: none;
  padding: 16px max(var(--space-8), var(--safe-right)) 16px max(var(--space-8), var(--safe-left));
  border-bottom: 1px solid var(--gray-100);
  transition: background var(--transition), color var(--transition);
  min-height: 48px;
  display: flex;
  align-items: center;
}
.mobile-nav > a:hover,
.mobile-nav-group-head > a:hover,
.mobile-nav-submenu a:hover {
  background: var(--gray-50);
  color: var(--blue);
}
.mobile-nav > a:last-child {
  color: var(--blue);
  font-weight: 600;
}
.mobile-nav[hidden] { display: none; }

.mobile-nav-group {
  border-bottom: 1px solid var(--gray-100);
}
.mobile-nav-group-head {
  display: flex;
  align-items: stretch;
}
.mobile-nav-group-head > a {
  flex: 1;
  border-bottom: none;
  min-width: 0;
}
.mobile-nav-submenu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 52px;
  border: none;
  border-left: 1px solid var(--gray-100);
  background: transparent;
  color: var(--gray-600);
  padding: 0;
  min-height: 48px;
}
.mobile-nav-submenu-toggle:hover {
  background: var(--gray-50);
  color: var(--blue);
}
.mobile-nav-submenu {
  background: var(--gray-50);
}
.mobile-nav-submenu[hidden] {
  display: none;
}
.mobile-nav-submenu a {
  font-size: 15px;
  padding-top: 12px;
  padding-bottom: 12px;
  min-height: 44px;
}
.mobile-nav-submenu a.mobile-nav-child {
  font-size: 14px;
  font-weight: 400;
  color: var(--gray-600);
  padding-left: calc(max(var(--space-8), var(--safe-left)) + var(--space-5));
}

/* --- Site Footer --- */
.site-footer {
  background: var(--footer-bg);
  color: var(--gray-400);
}

.footer-main {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-10);
  align-items: start;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-16) var(--space-8) var(--space-10);
}

.footer-address {
  font-size: 14px;
  line-height: 1.85;
}
.footer-address strong {
  color: #fff;
  display: block;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: var(--space-3);
}
.footer-phone {
  display: inline-block;
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  margin-top: var(--space-3);
  transition: color var(--transition);
}
.footer-phone:hover { color: #93c5fd; }

.footer-logo img {
  height: 52px;
  width: auto;
  opacity: 0.95;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  text-align: right;
}
.footer-nav a {
  font-size: 14px;
  color: var(--gray-400);
  text-decoration: none;
  transition: color var(--transition);
}
.footer-nav a:hover { color: #93c5fd; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-5) var(--space-8) var(--space-6);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-6);
  flex-wrap: wrap;
}
.footer-copy {
  font-size: 12px;
  color: var(--gray-500);
  line-height: 1.75;
  max-width: 720px;
}
.footer-trademark {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.35);
  margin-top: var(--space-2);
}
.footer-social {
  display: flex;
  gap: var(--space-4);
  flex-shrink: 0;
  flex-wrap: wrap;
}
.footer-social a {
  font-size: 13px;
  color: var(--gray-500);
  text-decoration: none;
  transition: color var(--transition);
}
.footer-social a:hover { color: #93c5fd; }

/* --- Responsive --- */
@media (max-width: 900px) {
  .main-nav { display: none; }
  .mobile-menu-toggle { display: flex; }

  .site-header-inner { padding: var(--space-3) max(var(--space-6), var(--safe-right)) var(--space-3) max(var(--space-6), var(--safe-left)); }

  .footer-main {
    grid-template-columns: 1fr;
    text-align: center;
    padding: var(--space-12) max(var(--space-6), var(--safe-right)) var(--space-8) max(var(--space-6), var(--safe-left));
  }
  .footer-logo { display: flex; justify-content: center; }
  .footer-nav { text-align: center; align-items: center; }
  .footer-bottom {
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding-left: max(var(--space-6), var(--safe-left));
    padding-right: max(var(--space-6), var(--safe-right));
    padding-bottom: max(var(--space-6), var(--safe-bottom));
  }
  .footer-social { justify-content: center; }
}

@media (max-width: 480px) {
  .header-logo { height: 48px; }
  .social-bar {
    gap: var(--space-1) var(--space-4);
    padding-top: 6px;
    padding-bottom: 6px;
  }
  .social-bar a { font-size: 11px; }
}