/* ==========================================================================
   iTradeAIMS Theme - Modern Glassmorphic Header & Top Announcement Banner
   ========================================================================== */

/* Top Announcement Banner */
.top-banner {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--banner-height);
  background: #0062d2;
  background: linear-gradient(90deg, #0056cc 0%, #007aff 50%, #0056cc 100%);
  z-index: 1002;
  display: flex;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

html.banner-dismissed .top-banner,
body.banner-dismissed .top-banner,
html.mobile-menu-open .top-banner,
body.mobile-menu-open .top-banner {
  display: none !important;
}

.top-banner-container {
  max-width: var(--container-max-width);
  width: 100%;
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.top-banner-content {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: #ffffff;
  text-align: center;
}

.top-banner-text {
  color: #ffffff;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.top-banner-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #ffffff;
  padding: 3px 12px;
  border-radius: 6px;
  font-size: 0.6875rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.top-banner-btn:hover {
  background: #ffffff;
  color: #0062d2;
  border-color: #ffffff;
  transform: translateY(-1px);
}

.top-banner-close {
  position: absolute;
  right: var(--container-padding);
  top: 50%;
  transform: translateY(-50%);
  color: rgba(255, 255, 255, 0.75);
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 5px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.top-banner-close:hover {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.18);
}

/* Header Base (Sticky / Fixed) */
.site-header {
  position: fixed;
  top: var(--banner-height);
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  background-color: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: top var(--transition-smooth),
              height var(--transition-smooth), 
              background-color var(--transition-smooth), 
              border-color var(--transition-smooth), 
              box-shadow var(--transition-smooth);
}

/* Scrolled Header State */
.site-header.is-scrolled {
  height: var(--header-height-scrolled);
  background-color: var(--bg-glass-scrolled);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: rgba(255, 255, 255, 0.1);
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.6);
}

/* Container */
.header-container {
  max-width: var(--container-max-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Brand Logo */
.header-brand {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.brand-logo:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.brand-logo-img {
  height: 32px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.25));
  transition: height var(--transition-smooth);
}

.site-header.is-scrolled .brand-logo-img {
  height: 28px;
}

/* Right-Side Cluster: Navigation + Actions */
.header-right {
  display: flex;
  align-items: center;
  gap: 36px;
}

/* Primary Navigation (Desktop) */
.primary-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-list .menu-item {
  position: relative;
}

.nav-list .nav-link,
.nav-list a {
  position: relative;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 0;
  display: inline-flex;
  align-items: center;
  transition: color var(--transition-fast);
  letter-spacing: -0.01em;
}

/* Hover Micro-Animation: Subtle Underline Glow */
.nav-list .nav-link::after,
.nav-list a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
  border-radius: 2px;
  transition: transform var(--transition-fast);
}

.nav-list .nav-link:hover,
.nav-list a:hover {
  color: var(--text-primary);
}

.nav-list .nav-link:hover::after,
.nav-list a:hover::after {
  transform: translateX(-50%) scaleX(1);
}

/* Active Menu Item State */
.nav-list .current-menu-item > a,
.nav-list .current_page_item > a {
  color: var(--text-primary);
  font-weight: 600;
}

.nav-list .current-menu-item > a::after,
.nav-list .current_page_item > a::after {
  transform: translateX(-50%) scaleX(1);
}

/* Actions: Login Button */
.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-login {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  cursor: pointer;
  overflow: hidden;
  transition: all var(--transition-fast);
}

.btn-login::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(0, 122, 255, 0.25) 0%, transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn-login .btn-icon {
  stroke: var(--accent-primary);
  transition: transform var(--transition-fast), stroke var(--transition-fast);
}

.btn-login:hover {
  background: rgba(0, 122, 255, 0.1);
  border-color: rgba(0, 122, 255, 0.4);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 122, 255, 0.25);
}

.btn-login:hover::before {
  opacity: 1;
}

.btn-login:hover .btn-icon {
  transform: translateX(2px);
  stroke: #ffffff;
}

/* Mobile Toggle Hamburger (Hidden on Desktop) */
.mobile-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 0;
  color: var(--text-primary);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.mobile-toggle:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-hover);
}

.hamburger-box {
  position: relative;
  width: 20px;
  height: 14px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hamburger-line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition-smooth), opacity var(--transition-smooth);
}

/* Mobile Toggle Active State Morph */
.mobile-toggle[aria-expanded="true"] .line-top {
  transform: translateY(6px) rotate(45deg);
}

.mobile-toggle[aria-expanded="true"] .line-bottom {
  transform: translateY(-6px) rotate(-45deg);
}

/* ==========================================================================
   Full-Screen Mobile Overlay Menu
   ========================================================================== */
.mobile-overlay {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  bottom: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  height: 100dvh !important;
  z-index: 999999 !important;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition-smooth), visibility var(--transition-smooth);
}

.mobile-overlay.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.mobile-overlay-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(8, 11, 17, 0.96);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
}

.mobile-overlay-container {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  height: 100dvh;
  max-height: 100dvh;
  padding: 20px 24px 32px;
  max-width: 480px;
  margin: 0 auto;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.mobile-overlay-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  min-height: 56px;
  margin-bottom: 28px;
  flex-shrink: 0;
}

.brand-logo-mobile .brand-logo-img {
  height: 28px;
}

.mobile-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mobile-close:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-hover);
  transform: rotate(90deg);
}

.mobile-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.mobile-nav-link,
.mobile-nav-list a {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-secondary);
  display: block;
  letter-spacing: -0.02em;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.mobile-nav-link:hover,
.mobile-nav-list a:hover {
  color: #ffffff;
  transform: translateX(8px);
}

.mobile-actions {
  padding-top: 32px;
  border-top: 1px solid var(--border-subtle);
}

.btn-login-mobile {
  width: 100%;
  justify-content: center;
  padding: 14px 24px;
  font-size: 1rem;
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #ffffff;
  box-shadow: 0 4px 20px var(--accent-primary-glow);
}

.btn-login-mobile .btn-icon {
  stroke: #ffffff;
}

.btn-login-mobile:hover {
  background: var(--accent-primary-hover);
  border-color: var(--accent-primary-hover);
  box-shadow: 0 6px 24px rgba(0, 122, 255, 0.45);
}

/* Body Scroll Lock & Banner Hide when Mobile Menu is Open */
body.mobile-menu-open {
  overflow: hidden;
}

body.mobile-menu-open .top-banner {
  display: none !important;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 991px) {
  .primary-nav {
    display: none;
  }

  .mobile-toggle {
    display: inline-flex;
  }

  .header-actions .btn-login {
    display: none;
  }
}

@media (max-width: 640px) {
  :root {
    --header-height: 70px;
    --header-height-scrolled: 64px;
    --container-padding: 16px;
  }

  .brand-logo-img {
    height: 26px;
  }

  .site-header.is-scrolled .brand-logo-img {
    height: 24px;
  }
}

@media (max-width: 768px) {
  .top-banner-btn {
    display: none;
  }

  .top-banner-text {
    font-size: 0.75rem;
  }

  .top-banner-container {
    padding-right: 42px;
  }
}

@media (max-width: 480px) {
  :root {
    --banner-height: 36px;
  }

  .top-banner-text {
    font-size: 0.75rem;
  }
}