/* ============================================================================
   SchemaReports - Navigation CSS
   Header, Navigation & Footer Styles v1.0
   ============================================================================ */

/* ============================================================================
   HEADER / NAVIGATION BAR
   ============================================================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  background: rgba(6, 13, 33, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
  transition: all var(--transition-base);
}

.header.scrolled {
  background: rgba(6, 13, 33, 0.98);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: var(--space-md) var(--container-padding);
  height: 72px;
}

/* ============================================================================
   LOGO
   ============================================================================ */

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-h4);
  color: var(--text-primary);
  transition: opacity var(--transition-fast);
}

.logo:hover {
  opacity: 0.9;
}

.logo-icon {
  width: 32px;
  height: 32px;
}

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

.logo-text .logo-highlight {
  color: var(--brand-primary);
}

/* ============================================================================
   MAIN NAVIGATION
   ============================================================================ */

.nav-main {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) 0;
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.nav-link.active {
  color: var(--brand-primary);
}

/* Nav Link Underline Animation */
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* ============================================================================
   DROPDOWN MENU
   ============================================================================ */

.nav-item-dropdown {
  position: relative;
}

.nav-dropdown-trigger {
  cursor: pointer;
}

.nav-dropdown-trigger::after {
  content: '';
  display: inline-block;
  width: 0;
  height: 0;
  margin-left: var(--space-xs);
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  transition: transform var(--transition-fast);
}

.nav-item-dropdown:hover .nav-dropdown-trigger::after {
  transform: rotate(180deg);
}

.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  min-width: 220px;
  padding: var(--space-sm);
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
}

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

.nav-dropdown-link {
  display: block;
  padding: var(--space-sm) var(--space-md);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-small);
  transition: all var(--transition-fast);
}

.nav-dropdown-link:hover {
  color: var(--text-primary);
  background: var(--glass-bg-subtle);
}

.nav-dropdown-link.active {
  color: var(--brand-primary);
  background: rgba(16, 185, 129, 0.1);
}

.nav-dropdown-divider {
  height: 1px;
  margin: var(--space-sm) 0;
  background: var(--glass-border);
}

/* ============================================================================
   NAVIGATION ACTIONS (Right Side)
   ============================================================================ */

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav-actions .btn {
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--font-size-small);
}

/* ============================================================================
   MOBILE NAVIGATION TOGGLE
   ============================================================================ */

.mobile-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: calc(var(--z-fixed) + 10);
}

.hamburger {
  position: relative;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
}

.hamburger::before {
  top: -8px;
}

.hamburger::after {
  bottom: -8px;
}

/* Hamburger to X animation */
.mobile-nav-toggle.active .hamburger {
  background: transparent;
}

.mobile-nav-toggle.active .hamburger::before {
  top: 0;
  transform: rotate(45deg);
}

.mobile-nav-toggle.active .hamburger::after {
  bottom: 0;
  transform: rotate(-45deg);
}

/* ============================================================================
   MOBILE NAVIGATION PANEL
   ============================================================================ */

.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-space);
  z-index: var(--z-fixed);
  padding: calc(72px + var(--space-xl)) var(--container-padding) var(--space-xl);
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

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

.mobile-nav-links {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-2xl) 0;
}

.mobile-nav-link {
  display: block;
  padding: var(--space-md) 0;
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  text-decoration: none;
  border-bottom: 1px solid var(--glass-border);
  transition: color var(--transition-fast);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  color: var(--brand-primary);
}

/* Mobile Dropdown */
.mobile-nav-dropdown {
  padding-left: var(--space-lg);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
}

.mobile-nav-dropdown.open {
  max-height: 500px;
}

.mobile-nav-dropdown-link {
  display: block;
  padding: var(--space-sm) 0;
  font-size: var(--font-size-body);
  color: var(--text-muted);
  text-decoration: none;
}

.mobile-nav-dropdown-link:hover,
.mobile-nav-dropdown-link.active {
  color: var(--brand-primary);
}

/* Mobile Nav Actions */
.mobile-nav-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.mobile-nav-actions .btn {
  width: 100%;
  justify-content: center;
}

/* ============================================================================
   RESPONSIVE NAVIGATION
   ============================================================================ */

@media (max-width: 1024px) {
  .nav-links {
    gap: var(--space-md);
  }

  .nav-link {
    font-size: var(--font-size-small);
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 60px;
    padding: var(--space-sm) var(--container-padding);
  }

  .nav-main {
    display: none;
  }

  .nav-actions {
    display: none;
  }

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

  .mobile-nav {
    display: block;
  }
}

/* ============================================================================
   FOOTER
   ============================================================================ */

.footer {
  background: var(--bg-dark);
  border-top: 1px solid var(--glass-border);
  padding-top: var(--space-4xl);
  padding-bottom: var(--space-2xl);
}

.footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Footer Grid */
.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

/* Footer Brand Section */
.footer-brand {
  max-width: 280px;
}

.footer-brand .logo {
  margin-bottom: var(--space-lg);
}

.footer-brand-description {
  font-size: var(--font-size-small);
  color: var(--text-muted);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-lg);
}

/* Footer Social Links */
.footer-social {
  display: flex;
  gap: var(--space-md);
}

.footer-social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--glass-bg-subtle);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.footer-social-link:hover {
  background: var(--brand-primary);
  border-color: var(--brand-primary);
  color: var(--text-primary);
}

/* Footer Columns */
.footer-column {
  display: flex;
  flex-direction: column;
}

.footer-column-title {
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-link {
  font-size: var(--font-size-small);
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--brand-primary);
}

/* Footer Contact */
.footer-contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-small);
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.footer-contact-item a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-contact-item a:hover {
  color: var(--brand-primary);
}

/* Footer Divider */
.footer-divider {
  height: 1px;
  background: var(--glass-border);
  margin-bottom: var(--space-xl);
}

/* Footer Bottom */
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-copyright {
  font-size: var(--font-size-small);
  color: var(--text-dim);
}

.footer-legal {
  display: flex;
  gap: var(--space-lg);
}

.footer-legal-link {
  font-size: var(--font-size-small);
  color: var(--text-dim);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-legal-link:hover {
  color: var(--text-secondary);
}

/* ============================================================================
   FOOTER RESPONSIVE
   ============================================================================ */

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
  }

  .footer-brand {
    grid-column: span 2;
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  .footer {
    padding-top: var(--space-3xl);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .footer-brand {
    grid-column: 1;
    text-align: center;
    max-width: 100%;
  }

  .footer-brand .logo {
    justify-content: center;
  }

  .footer-social {
    justify-content: center;
  }

  .footer-column {
    align-items: center;
    text-align: center;
  }

  .footer-links {
    align-items: center;
  }

  .footer-contact-item {
    justify-content: center;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .footer-legal {
    justify-content: center;
  }
}

/* ============================================================================
   BREADCRUMB NAVIGATION
   ============================================================================ */

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
  padding: var(--space-md) 0;
  font-size: var(--font-size-small);
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.breadcrumb-item::after {
  content: '/';
  color: var(--text-dim);
}

.breadcrumb-item:last-child::after {
  display: none;
}

.breadcrumb-link {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb-link:hover {
  color: var(--brand-primary);
}

.breadcrumb-current {
  color: var(--text-secondary);
}

/* ============================================================================
   PHASE NAVIGATION (Sidebar)
   ============================================================================ */

.phase-nav {
  position: sticky;
  top: 100px;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.phase-nav-title {
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-semibold);
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-lg);
}

.phase-nav-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.phase-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-small);
  color: var(--text-muted);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.phase-nav-link:hover {
  background: var(--glass-bg-subtle);
  color: var(--text-secondary);
}

.phase-nav-link.active {
  background: rgba(16, 185, 129, 0.1);
  color: var(--brand-primary);
}

.phase-nav-number {
  font-family: var(--font-display);
  font-size: var(--font-size-xs);
  color: var(--text-dim);
  min-width: 20px;
}

@media (max-width: 1024px) {
  .phase-nav {
    position: static;
    margin-bottom: var(--space-xl);
  }
}

/* ============================================================================
   STICKY MOBILE CTA BAR
   ============================================================================ */

.sticky-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  background: var(--bg-dark);
  border-top: 1px solid var(--glass-border);
  padding: var(--space-md) var(--container-padding);
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
}

.sticky-cta-inner {
  display: flex;
  gap: var(--space-md);
  max-width: var(--container-max);
  margin: 0 auto;
}

.sticky-cta .btn {
  flex: 1;
  justify-content: center;
}

@media (max-width: 768px) {
  .sticky-cta {
    display: block;
  }

  /* Add padding to body to account for sticky CTA */
  body.has-sticky-cta {
    padding-bottom: 80px;
  }
}

/* ============================================================================
   SKIP LINK (Accessibility)
   ============================================================================ */

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-md);
  z-index: calc(var(--z-fixed) + 100);
  padding: var(--space-sm) var(--space-md);
  background: var(--brand-primary);
  color: var(--text-primary);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-md);
}

/* ============================================================================
   BACK TO TOP BUTTON
   ============================================================================ */

.back-to-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  z-index: var(--z-sticky);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--brand-primary);
  border-color: var(--brand-primary);
  color: var(--text-primary);
  transform: translateY(-4px);
}

@media (max-width: 768px) {
  .back-to-top {
    bottom: 100px; /* Account for sticky CTA */
    right: var(--space-md);
    width: 44px;
    height: 44px;
  }
}

/* ============================================================================
   PAGE TRANSITION OVERLAY
   ============================================================================ */

.page-transition {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: calc(var(--z-modal) + 100);
  background: var(--bg-space);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.page-transition.active {
  opacity: 1;
  visibility: visible;
}

.page-transition-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--glass-border);
  border-top-color: var(--brand-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}