/* ==================== VARIABLES ==================== */
:root {
  /* Modern 2026 Nav - Glass Morphism */
  --nav-bg: rgba(255, 255, 255, 0.8);
  --nav-border: rgba(255, 255, 255, 0.3);
  --nav-text: #374151;
  --nav-hover-bg: #EFF6FF;
  --nav-hover-text: #2563EB;
  --nav-cta-bg: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);
  --nav-cta-text: #FFFFFF;
  --dropdown-bg: #FFFFFF;
  --dropdown-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --dropdown-text: #374151;
  --dropdown-hover: #F9FAFB;
  --nav-transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==================== NAVIGATION BAR ==================== */
.main-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(229, 231, 235, 0.8);
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 2rem;
}

/* ==================== LOGO ==================== */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  font-size: 1.375rem;
  font-weight: 800;
  color: #111827;
  transition: var(--nav-transition);
  flex-shrink: 0;
  letter-spacing: -0.02em;
}

.nav-logo:hover {
  color: #2563EB;
}

.nav-logo img {
  height: 34px;
  width: auto;
}

.logo-text {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Inter', sans-serif;
}

/* ==================== NAVIGATION MENU ==================== */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

/* Scoped to .main-nav to avoid conflicts with any page-level .nav-link styles */
.main-nav .nav-link {
  color: var(--nav-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
  padding: 0.625rem 1rem;
  border-radius: 8px;
  transition: var(--nav-transition);
  background: transparent;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  white-space: nowrap;
  font-family: inherit;
}

.main-nav .nav-link:hover,
.main-nav .nav-link.active {
  color: var(--nav-hover-text);
  background: var(--nav-hover-bg);
}

.dropdown-icon {
  width: 16px;
  height: 16px;
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  flex-shrink: 0;
  opacity: 0.6;
}

/* ==================== DROPDOWN MENUS ==================== */
.nav-item-dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  background: var(--dropdown-bg);
  border: 1px solid #E5E7EB;
  border-radius: 12px;
  padding: 0.5rem;
  min-width: 280px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: var(--nav-transition);
  z-index: 100;
  box-shadow: var(--dropdown-shadow);
}

.nav-item-dropdown:hover .dropdown-menu,
.nav-item-dropdown:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-item-dropdown:hover .dropdown-icon {
  transform: rotate(180deg);
  opacity: 1;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.875rem;
  border-radius: 8px;
  color: var(--dropdown-text);
  text-decoration: none;
  transition: background 0.15s;
}

.dropdown-item:hover {
  background: var(--dropdown-hover);
}

.item-icon {
  font-size: 1.25rem;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(103, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
  border-radius: 8px;
  flex-shrink: 0;
  text-align: center;
}

.item-content {
  flex: 1;
}

.item-title {
  font-weight: 600;
  font-size: 0.9375rem;
  color: #111827;
  margin-bottom: 0.125rem;
}

.item-desc {
  font-size: 0.8125rem;
  color: #6B7280;
}

/* ==================== CTA BUTTON ==================== */
.nav-cta {
  background: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);
  color: #FFFFFF;
  padding: 0.625rem 1.375rem;
  border: none;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.9375rem;
  cursor: pointer;
  transition: var(--nav-transition);
  white-space: nowrap;
  margin-left: 0.75rem;
  flex-shrink: 0;
  box-shadow: 0 4px 6px -1px rgba(59, 130, 246, 0.3);
  font-family: inherit;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 15px -3px rgba(59, 130, 246, 0.35);
}

.nav-cta:active {
  transform: translateY(0);
}

/* ==================== MOBILE MENU TOGGLE ==================== */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  margin-left: 0.5rem;
  border-radius: 8px;
  transition: background 0.15s;
}

.mobile-menu-toggle:hover {
  background: #F3F4F6;
}

.hamburger-line {
  width: 24px;
  height: 2px;
  background: #374151;
  border-radius: 2px;
  transition: var(--nav-transition);
  display: block;
}

/* ==================== MOBILE NAVIGATION OVERLAY ==================== */
.mobile-nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: var(--nav-transition);
}

.mobile-nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

.mobile-nav-content {
  position: absolute;
  right: 0;
  top: 0;
  width: 300px;
  max-width: 90%;
  height: 100%;
  background: white;
  padding: 2rem 1.5rem;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: -8px 0 32px rgba(0, 0, 0, 0.12);
}

.mobile-nav-overlay.active .mobile-nav-content {
  transform: translateX(0);
}

.mobile-nav-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: #F3F4F6;
  border: none;
  font-size: 1.25rem;
  color: #374151;
  cursor: pointer;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  transition: background 0.15s;
  line-height: 1;
}

.mobile-nav-close:hover {
  background: #E5E7EB;
}

.mobile-nav-menu {
  margin-top: 2.5rem;
}

.mobile-nav-section {
  margin-bottom: 1.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid #F3F4F6;
}

.mobile-nav-section:last-of-type {
  border-bottom: none;
}

.mobile-nav-title {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  color: #9CA3AF;
  letter-spacing: 0.08em;
  margin-bottom: 0.625rem;
}

.mobile-nav-link {
  display: block;
  padding: 0.625rem 0;
  color: #374151;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
  transition: color 0.15s;
}

.mobile-nav-link:hover {
  color: #2563EB;
}

.mobile-nav-cta {
  width: 100%;
  background: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);
  color: white;
  padding: 0.875rem;
  border: none;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.9375rem;
  cursor: pointer;
  margin-top: 1rem;
  transition: var(--nav-transition);
  font-family: inherit;
  box-shadow: 0 4px 6px -1px rgba(59, 130, 246, 0.3);
}

.mobile-nav-cta:hover {
  box-shadow: 0 10px 15px -3px rgba(59, 130, 246, 0.35);
  transform: translateY(-1px);
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 968px) {
  .nav-menu {
    display: none;
  }

  .nav-cta {
    display: none;
  }

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

@media (max-width: 640px) {
  .nav-container {
    padding: 0 1rem;
  }

  .logo-text {
    font-size: 1.25rem;
  }
}

/* ==================== ACCESSIBILITY ==================== */
.main-nav .nav-link:focus-visible,
.nav-cta:focus-visible,
.dropdown-item:focus-visible,
.mobile-menu-toggle:focus-visible {
  outline: 2px solid #3B82F6;
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .main-nav *,
  .mobile-nav-overlay,
  .mobile-nav-content {
    transition: none !important;
    animation: none !important;
  }
}

/* ==================== TAB FADE ANIMATION ==================== */
[data-tab] {
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
}

[data-tab].active {
  opacity: 1;
}

/* ==================== APP SECTION FADE-IN ==================== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.app-section.active {
  animation: fadeIn 0.3s ease-in-out;
}