.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-xs);
}

.header-top {
  background: var(--color-primary);
  color: #fff;
  font-size: var(--fs-small);
}

.header-top__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: var(--header-top-h);
}

.header-top__contacts,
.header-top__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.header-top a,
.header-top button {
  color: #fff;
  background: transparent;
  border: 0;
  font: inherit;
  cursor: pointer;
  opacity: 0.95;
}

.header-top a:hover,
.header-top button:hover {
  opacity: 1;
  text-decoration: underline;
}

.header-main {
  min-height: var(--header-main-h);
}

.header-main__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: var(--header-main-h);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
  max-width: 420px;
}

.brand:hover {
  color: var(--color-primary);
}

.brand__emblems {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.brand__logo,
.brand__arms {
  height: 52px;
  width: auto;
  object-fit: contain;
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.brand__title {
  font-size: var(--fs-small);
  font-weight: var(--fw-bold);
  line-height: 1.25;
  color: var(--color-primary);
}

.brand__subtitle {
  font-size: var(--fs-caption);
  color: var(--color-text-muted);
  line-height: 1.3;
}

.nav-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-primary);
  font-size: 1.35rem;
  cursor: pointer;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.7rem 0.85rem;
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link[aria-current="page"],
.nav-link.is-active {
  background: rgba(46, 141, 228, 0.1);
  color: var(--color-primary);
}

.nav-item--mega {
  position: relative;
}

.mega-panel {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  width: min(920px, 90vw);
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--duration) var(--ease), transform var(--duration) var(--ease), visibility var(--duration);
}

.nav-item--mega:hover .mega-panel,
.nav-item--mega:focus-within .mega-panel,
.nav-item--mega.is-open .mega-panel {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.mega-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

.mega-link {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  color: var(--color-text);
}

.mega-link:hover,
.mega-link:focus-visible {
  background: rgba(46, 141, 228, 0.08);
  border-color: #d7e7f6;
  color: var(--color-primary);
}

.mega-link i {
  color: var(--color-accent);
  font-size: 1.25rem;
}

.mega-link strong {
  display: block;
  font-size: var(--fs-small);
}

.mega-link span {
  display: block;
  margin-top: 0.2rem;
  color: var(--color-text-muted);
  font-size: var(--fs-caption);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.search-panel {
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  padding: var(--space-4) 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  display: none;
}

.search-panel.is-open {
  display: block;
}

.search-panel__form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-3);
}

.breadcrumb-nav {
  background: #eef3f8;
  border-bottom: 1px solid var(--color-border);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0;
  padding: var(--space-4) 0;
  list-style: none;
  font-size: var(--fs-small);
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-muted);
}

.breadcrumb-item:not(:last-child)::after {
  content: "/";
  color: #94a3b8;
  margin-left: var(--space-2);
}

.breadcrumb-item a {
  color: var(--color-secondary);
}

.breadcrumb-item.active {
  color: var(--color-text);
  font-weight: var(--fw-medium);
}

@media (max-width: 991.98px) {
  .nav-toggle {
    display: inline-grid;
    place-items: center;
  }

  .main-nav {
    position: fixed;
    inset: var(--header-sticky-offset) 0 auto 0;
    display: block;
    max-height: calc(100vh - var(--header-sticky-offset));
    overflow: auto;
    padding: var(--space-4);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration) var(--ease);
  }

  .main-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
  }

  .mega-panel {
    position: static;
    transform: none;
    width: 100%;
    box-shadow: none;
    border: 0;
    padding: var(--space-2) 0 var(--space-2) var(--space-3);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    display: none;
  }

  .nav-item--mega.is-open .mega-panel {
    display: block;
  }

  .mega-grid {
    grid-template-columns: 1fr;
  }

  .brand__subtitle {
    display: none;
  }
}

@media (max-width: 767.98px) {
  .header-top__contacts span.hide-sm,
  .header-top__contacts .hours {
    display: none;
  }

  .brand {
    max-width: 220px;
  }

  .brand__logo,
  .brand__arms {
    height: 42px;
  }
}