/* ==========================================================================
   Layout Styles (Header, Navigation, Mega Menus, Footer) - OrbiFusionAI
   ========================================================================== */

/* Top Demo Banner */
.demo-banner {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.4rem 1rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
}

.demo-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.15rem 0.5rem;
  background: var(--accent-light);
  color: var(--accent-primary);
  border-radius: var(--radius-sm);
  font-weight: 600;
}

/* Site Header */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 900;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  height: var(--header-height);
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
}

.site-header.scrolled {
  height: var(--header-height-scrolled);
  box-shadow: var(--shadow-sm);
  background: var(--bg-glass);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  user-select: none;
}

.logo-symbol {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-text {
  display: flex;
  align-items: baseline;
}

.logo-text span {
  color: var(--accent-primary);
}

/* Navigation Links */
.main-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  padding: 0.5rem 0.25rem;
  transition: color var(--transition-fast);
}

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

.nav-link svg.chevron {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-fast);
}

.nav-item:hover .nav-link svg.chevron {
  transform: rotate(180deg);
}

/* Dropdown Menus */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: 1.25rem;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all var(--transition-normal);
  z-index: 950;
}

.nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.mega-menu {
  width: 720px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.mega-menu-3col {
  width: 900px;
  grid-template-columns: repeat(3, 1fr);
}

.menu-item {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  padding: 0.75rem;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.menu-item:hover {
  background: var(--bg-secondary);
}

.menu-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--accent-light);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.menu-text h5 {
  font-size: 0.9375rem;
  margin-bottom: 0.2rem;
}

.menu-text p {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  line-height: 1.4;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.875rem;
}

.cmd-palette-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-secondary);
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.cmd-palette-btn:hover {
  border-color: var(--border-medium);
  color: var(--text-primary);
}

.cmd-kbd {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.15rem 0.35rem;
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  border-radius: 4px;
}

.mobile-menu-btn {
  display: none;
  padding: 0.5rem;
  font-size: 1.25rem;
  color: var(--text-primary);
}

/* Mobile Drawer */
.mobile-nav-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 85%;
  max-width: 380px;
  height: 100vh;
  background: var(--bg-card);
  border-left: 1px solid var(--border-medium);
  box-shadow: var(--shadow-xl);
  z-index: 1200;
  transition: right var(--transition-normal);
  padding: 2rem 1.5rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.mobile-nav-drawer.open {
  right: 0;
}

.mobile-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.mobile-nav-item a {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  display: block;
  padding: 0.5rem 0;
}

/* Footer */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  padding: 5rem 0 2.5rem 0;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

.footer-brand p {
  margin-top: 1rem;
  font-size: 0.9375rem;
  max-width: 320px;
}

.footer-col h6 {
  margin-bottom: 1.25rem;
  color: var(--text-primary);
  font-size: 0.85rem;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-col a {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.footer-col a:hover {
  color: var(--accent-primary);
}

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.875rem;
  color: var(--text-tertiary);
  flex-wrap: wrap;
  gap: 1rem;
}

.legal-entity-note {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

@media (max-width: 1024px) {
  .main-nav, .cmd-palette-btn { display: none; }
  .mobile-menu-btn { display: block; }
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
}

@media (max-width: 640px) {
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}