/* ==========================================================================
   HEADER — topbar, main row (logo / search / actions), main navigation
   ========================================================================== */

/* ---- Topbar ------------------------------------------------------------ */

.topbar {
  background: var(--secondary);
  color: var(--text-on-dark-muted);
  font-size: var(--fs-xs);
}

.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  min-height: 40px;
}

.topbar__note {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--on-secondary);
}

.topbar__note .icon {
  width: 16px;
  height: 16px;
  color: var(--accent);
}

.topbar__links {
  display: flex;
  align-items: center;
}

.topbar__links li + li {
  border-inline-start: 1px solid var(--border-on-dark);
}

.topbar__links a,
.topbar__links span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px var(--space-4);
  transition: color var(--duration-fast) var(--ease);
}

.topbar__links li:last-child a {
  padding-inline-end: 0;
}

.topbar__links a:hover {
  color: var(--on-secondary);
}

.topbar__links .icon {
  width: 15px;
  height: 15px;
}

/* ---- Sticky header ----------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--duration) var(--ease);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow);
}

.site-header__main {
  display: grid;
  grid-template-columns: auto minmax(240px, 640px) auto;
  grid-template-areas: "logo search actions";
  align-items: center;
  justify-content: space-between;
  gap: var(--space-7);
  min-height: var(--header-height);
}

.site-header__logo {
  grid-area: logo;
}

.site-header__search {
  grid-area: search;
}

.site-header__menu-toggle {
  grid-area: toggle;
  display: none;
}

/* ---- Header actions (account / cart) ----------------------------------- */

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

.header-action {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 48px;
  padding: 0 var(--space-3);
  border-radius: var(--radius);
  transition: background-color var(--duration-fast) var(--ease);
}

.header-action:hover {
  background: var(--surface-steel);
}

.header-action__icon {
  position: relative;
  display: grid;
  place-items: center;
}

.header-action__icon .icon {
  width: 24px;
  height: 24px;
}

.header-action__label {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  white-space: nowrap;
}

.header-action__label small {
  font-size: var(--fs-2xs);
  font-weight: var(--fw-regular);
  color: var(--text-muted);
}

.header-action__badge {
  position: absolute;
  top: -6px;
  inset-inline-start: -8px;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: var(--on-accent);
  font-size: 11px;
  font-weight: var(--fw-bold);
  line-height: 18px;
  text-align: center;
}

/* ---- Main navigation --------------------------------------------------- */

.main-nav {
  border-top: 1px solid var(--border);
}

.main-nav__inner {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 56px;
}

.main-nav__departments {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  height: 40px;
  padding: 0 var(--space-4);
  margin-inline-end: var(--space-3);
  border-radius: var(--radius);
  background: var(--secondary);
  color: var(--on-secondary);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-sm);
  white-space: nowrap;
  transition: background-color var(--duration-fast) var(--ease);
}

.main-nav__departments:hover,
.main-nav__departments[aria-expanded="true"] {
  background: var(--primary);
}

.main-nav__departments .icon {
  width: 18px;
  height: 18px;
}

.main-nav__departments .icon--chevron {
  width: 16px;
  height: 16px;
  transition: transform var(--duration) var(--ease);
}

.main-nav__departments[aria-expanded="true"] .icon--chevron {
  transform: rotate(180deg);
}

.main-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  min-width: 0;
  overflow: hidden;
}

.main-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--text);
  white-space: nowrap;
  transition:
    color var(--duration-fast) var(--ease),
    background-color var(--duration-fast) var(--ease);
}

.main-nav__link:hover {
  background: var(--surface-steel);
}

.main-nav__link[aria-current="page"] {
  color: var(--primary);
}

.main-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  inset-inline: var(--space-3);
  bottom: -8px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
}

.main-nav__divider {
  width: 1px;
  height: 20px;
  margin-inline: var(--space-2);
  background: var(--border);
  flex-shrink: 0;
}

.main-nav__cta {
  margin-inline-start: auto;
  flex-shrink: 0;
}

/* ---- Overlay (shared by mega menu + drawer) ----------------------------- */

.page-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  background: rgb(15 18 22 / 0.45);
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--duration) var(--ease),
    visibility var(--duration) var(--ease);
}

.page-overlay.is-visible {
  opacity: 1;
  visibility: visible;
}

/* Mega menu overlay sits under the sticky header */
.page-overlay--under-header {
  z-index: calc(var(--z-header) - 1);
}

/* ---- Responsive -------------------------------------------------------- */

@media (max-width: 1280px) {
  .site-header__main {
    gap: var(--space-5);
  }

  .header-action__label small {
    display: none;
  }
}

@media (max-width: 1080px) {
  .main-nav__item--department {
    display: none;
  }
}

@media (max-width: 992px) {
  :root {
    --header-height: 64px;
  }

  .topbar__links li:not(.topbar__item--phone) {
    display: none;
  }

  .site-header__main {
    grid-template-columns: auto 1fr auto;
    grid-template-areas:
      "toggle logo actions"
      "search search search";
    column-gap: var(--space-2);
    row-gap: 0;
    padding-bottom: var(--space-3);
  }

  .site-header__menu-toggle {
    display: inline-grid;
    margin-inline-start: calc(var(--space-2) * -1);
  }

  .site-header__logo {
    justify-self: start;
  }

  .header-action {
    padding: 0 var(--space-2);
    min-height: 44px;
  }

  .header-action__label {
    display: none;
  }

  .main-nav {
    display: none;
  }

  .search__input {
    height: 44px;
  }

  .search__submit {
    width: 36px;
    height: 36px;
  }
}

@media (max-width: 560px) {
  .topbar__inner {
    justify-content: center;
    min-height: 34px;
  }

  .topbar__links {
    display: none;
  }

  .header-actions {
    gap: 0;
  }
}