/* ============================================================
   NEXIA MARKETPLACE — HEADER & NAVIGATION v2
   Light/Dark adaptive via CSS variables
   ============================================================ */

/* ── Announcement bar ───────────────────────────────────── */
.announcement-bar {
  background: var(--gradient-brand);
  background-size: 200% 200%;
  animation: gradientShift 8s ease infinite;
  padding: 9px var(--space-6);
  text-align: center;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #fff;
  position: relative;
  z-index: var(--z-sticky);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}
.announcement-bar a {
  text-decoration: underline;
  text-underline-offset: 2px;
  opacity: 0.92;
}
.announcement-bar a:hover { opacity: 1; }
.announcement-bar .close-bar {
  position: absolute;
  right: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  opacity: 0.75;
  cursor: pointer;
  padding: 6px;
  line-height: 1;
  transition: opacity var(--duration-fast);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
}
.announcement-bar .close-bar:hover { opacity: 1; background: rgba(255,255,255,0.15); }

/* ── Main Header ────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  padding-block: 14px;
  transition:
    background var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out),
    padding var(--duration-base) var(--ease-out);
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: var(--bg-glass);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom-color: var(--border-subtle);
  box-shadow: var(--shadow-md);
  padding-block: 10px;
}

.header-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-6);
}

/* ── Logo ───────────────────────────────────────────────── */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}
.logo-icon {
  width: 36px; height: 36px;
  border-radius: var(--radius-md);
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-brand);
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}
.logo-icon::after {
  content: '';
  position: absolute;
  inset: -50%;
  background: radial-gradient(circle at 35% 35%, rgba(255,255,255,0.28), transparent 55%);
  pointer-events: none;
}
.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: -0.035em;
  color: var(--text-primary);
  line-height: 1;
}
.logo-text span { color: var(--text-brand); }

/* ── Main Nav ───────────────────────────────────────────── */
.main-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
}
.nav-item { position: relative; }
.nav-link {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}
.nav-link:hover { color: var(--text-primary); background: var(--bg-raised); }
.nav-link .icon { transition: transform var(--duration-fast); }
.nav-item:hover .nav-link .icon { transform: rotate(180deg); }

/* ── Mega Dropdown ──────────────────────────────────────── */
.nav-dropdown {
  position: absolute;
  top: calc(100% + 14px);
  left: 50%;
  transform: translateX(-50%) translateY(-8px) scale(0.96);
  opacity: 0;
  pointer-events: none;
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  min-width: 540px;
  padding: var(--space-5);
  transition: all var(--duration-base) var(--ease-out);
  z-index: var(--z-dropdown);
}
.nav-item:hover .nav-dropdown {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0) scale(1);
}

.nav-dropdown-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-1);
}

.dropdown-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  transition: background var(--duration-fast);
  cursor: pointer;
}
.dropdown-item:hover { background: var(--bg-surface); }

.dropdown-item-icon {
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  background: var(--bg-raised);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--text-brand);
  transition: all var(--duration-fast);
}
.dropdown-item:hover .dropdown-item-icon {
  background: rgba(99,102,241,0.10);
  border-color: var(--border-brand);
}

.dropdown-item-text .item-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 2px;
}
.dropdown-item-text .item-desc {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  line-height: 1.4;
}

.nav-dropdown-footer {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.nav-dropdown-footer .view-all {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-brand);
  display: flex;
  align-items: center;
  gap: var(--space-1);
  transition: gap var(--duration-fast);
}
.nav-dropdown-footer .view-all:hover { gap: 8px; }
.nav-dropdown-footer .count-badge {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

/* ── Header Actions ─────────────────────────────────────── */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}
.header-search-toggle {
  width: 36px; height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  border: 1px solid var(--border-default);
  background: var(--bg-card);
  box-shadow: var(--shadow-xs);
  transition: all var(--duration-fast);
}
.header-search-toggle:hover {
  color: var(--text-primary);
  background: var(--bg-raised);
  border-color: var(--border-strong);
}

/* ── Hamburger ──────────────────────────────────────────── */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 40px; height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  box-shadow: var(--shadow-xs);
  transition: all var(--duration-fast);
  cursor: pointer;
}
.hamburger:hover { background: var(--bg-raised); border-color: var(--border-strong); }
.hamburger span {
  display: block;
  width: 18px; height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all var(--duration-base) var(--ease-out);
  transform-origin: center;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); background: var(--text-primary); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); background: var(--text-primary); }

/* ── Search Overlay ─────────────────────────────────────── */
.search-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay-backdrop);
  backdrop-filter: blur(20px) saturate(150%);
  z-index: var(--z-modal);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 100px;
  opacity: 0;
  pointer-events: none;
  transition: all var(--duration-base) var(--ease-out);
}
.search-overlay.open { opacity: 1; pointer-events: auto; }

.search-overlay-inner {
  width: 100%;
  max-width: 660px;
  padding-inline: var(--space-6);
  transform: translateY(-16px);
  transition: transform var(--duration-base) var(--ease-out);
}
.search-overlay.open .search-overlay-inner { transform: translateY(0); }

.search-overlay-input-wrap {
  position: relative;
  margin-bottom: var(--space-4);
}
.search-overlay-input {
  width: 100%;
  background: var(--bg-card);
  border: 1.5px solid var(--border-default);
  border-radius: var(--radius-2xl);
  padding: 16px 56px 16px 52px;
  font-size: var(--text-xl);
  color: var(--text-primary);
  outline: none;
  box-shadow: var(--shadow-lg);
  transition: all var(--duration-base);
}
.search-overlay-input::placeholder { color: var(--text-tertiary); }
.search-overlay-input:focus {
  border-color: var(--brand-500);
  box-shadow: var(--shadow-lg), 0 0 0 4px rgba(99,102,241,0.15);
}
.search-overlay-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
}
.search-overlay-close {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 36px; height: 36px;
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary);
  background: var(--bg-raised);
  transition: all var(--duration-fast);
}
.search-overlay-close:hover { color: var(--text-primary); background: var(--bg-overlay); }

.search-suggestions {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}
.search-section-title {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  padding: 12px 20px 8px;
}
.search-suggestion-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 11px 20px;
  transition: background var(--duration-fast);
  cursor: pointer;
}
.search-suggestion-item:hover { background: var(--bg-surface); }
.suggestion-icon {
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  background: var(--bg-raised);
  border: 1px solid var(--border-subtle);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-brand);
  flex-shrink: 0;
}
.suggestion-text { font-size: var(--text-sm); color: var(--text-primary); }
.suggestion-type { font-size: var(--text-xs); color: var(--text-tertiary); margin-top: 1px; }

.search-trending {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: 10px 20px;
}
.search-trending a {
  padding: 5px 12px;
  border-radius: var(--radius-full);
  background: var(--bg-raised);
  border: 1px solid var(--border-subtle);
  font-size: var(--text-xs);
  color: var(--text-secondary);
  transition: all var(--duration-fast);
}
.search-trending a:hover {
  background: rgba(99,102,241,0.10);
  color: var(--text-brand);
  border-color: var(--border-brand);
}

/* ── Mobile Overlay ─────────────────────────────────────── */
.mobile-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay-dim);
  z-index: calc(var(--z-overlay) - 1);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-out);
  backdrop-filter: blur(3px);
}
.mobile-overlay.open { opacity: 1; pointer-events: auto; }

/* ── Mobile Menu ────────────────────────────────────────── */
.mobile-menu {
  position: fixed;
  top: 0; right: 0;
  height: 100dvh;
  width: min(360px, 92vw);
  background: var(--bg-card);
  border-left: 1px solid var(--border-subtle);
  z-index: var(--z-overlay);
  transform: translateX(100%);
  transition: transform var(--duration-slow) var(--ease-out);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}
.mobile-menu.open { transform: translateX(0); }

.mobile-menu-header {
  padding: 18px var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}
.mobile-menu-close {
  width: 40px; height: 40px;
  border-radius: var(--radius-md);
  background: var(--bg-raised);
  border: 1px solid var(--border-default);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary);
  transition: all var(--duration-fast);
}
.mobile-menu-close:hover { color: var(--text-primary); background: var(--bg-overlay); }

.mobile-menu-search {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
}
.mobile-menu-search .search-input-wrap {
  position: relative;
}
.mobile-menu-search input {
  width: 100%;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: 10px 16px 10px 40px;
  font-size: var(--text-sm);
  color: var(--text-primary);
  outline: none;
  transition: all var(--duration-fast);
}
.mobile-menu-search input::placeholder { color: var(--text-tertiary); }
.mobile-menu-search input:focus { border-color: var(--brand-500); background: var(--bg-card); }
.mobile-menu-search .search-icon-inner {
  position: absolute;
  left: 12px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
}

.mobile-menu-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-3) 0;
  -webkit-overflow-scrolling: touch;
}
.mobile-nav-section { margin-bottom: var(--space-2); }
.mobile-nav-section-title {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  padding: 8px var(--space-5) 4px;
}
.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 11px var(--space-5);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--duration-fast);
  position: relative;
  min-height: 44px;
}
.mobile-nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-surface);
}
.mobile-nav-link.active {
  color: var(--text-brand);
  background: rgba(99,102,241,0.07);
}
.mobile-nav-link.active::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  height: 22px; width: 3px;
  background: var(--gradient-brand);
  border-radius: 0 3px 3px 0;
}
.mobile-nav-icon {
  width: 34px; height: 34px;
  border-radius: var(--radius-sm);
  background: var(--bg-raised);
  border: 1px solid var(--border-subtle);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary);
  flex-shrink: 0;
  transition: all var(--duration-fast);
}
.mobile-nav-link:hover .mobile-nav-icon { background: var(--bg-overlay); color: var(--text-primary); }
.mobile-nav-link.active .mobile-nav-icon {
  background: rgba(99,102,241,0.12);
  border-color: var(--border-brand);
  color: var(--text-brand);
}
.mobile-nav-badge {
  margin-left: auto;
  padding: 2px 8px;
  background: rgba(99,102,241,0.10);
  border: 1px solid rgba(99,102,241,0.20);
  border-radius: var(--radius-full);
  font-size: 10px;
  font-weight: 700;
  color: var(--text-brand);
  flex-shrink: 0;
}

.mobile-menu-footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--border-subtle);
  flex-shrink: 0;
}
.mobile-menu-cta {
  width: 100%;
  background: var(--gradient-brand);
  color: #fff;
  padding: 14px;
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  font-weight: 700;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  box-shadow: var(--shadow-brand);
  transition: all var(--duration-fast);
}
.mobile-menu-cta:hover { opacity: 0.92; transform: translateY(-1px); }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 1024px) {
  .main-nav { display: none; }
  .hamburger { display: flex; }
  .header-actions .btn { display: none; }
}
@media (max-width: 480px) {
  .header-inner { gap: var(--space-3); }
  .logo-text { font-size: var(--text-lg); }
}