/**
 * Unified Navigation Component
 * Modern, responsive navigation bar for Mindeck platform
 * Supports desktop and mobile layouts with smooth transitions
 */

/* ============================================
   NAVIGATION CONTAINER
   ============================================ */

.mindeck-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border-primary);
  z-index: var(--z-index-sticky);
  transition: background var(--transition-base), border-color var(--transition-base);
}

.mindeck-nav-container {
  max-width: var(--container-2xl);
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
}

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

.mindeck-nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--text-primary);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-lg);
  transition: opacity var(--transition-fast);
}

.mindeck-nav-logo:hover {
  opacity: 0.8;
}

.mindeck-nav-logo-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--interactive-primary), var(--interactive-secondary));
  border-radius: var(--radius-md);
  color: var(--text-inverse);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-base);
}

.mindeck-nav-logo-text {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-tight);
}

/* ============================================
   DESKTOP NAVIGATION LINKS
   ============================================ */

.mindeck-nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex: 1;
  justify-content: center;
}

.mindeck-nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
}

.mindeck-nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.mindeck-nav-link.active {
  color: var(--interactive-primary);
  background: rgba(33, 150, 243, 0.1);
}

.mindeck-nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: var(--space-4);
  right: var(--space-4);
  height: 2px;
  background: var(--interactive-primary);
  border-radius: var(--radius-full);
}

/* Link icons */
.mindeck-nav-link-icon {
  width: 18px;
  height: 18px;
  opacity: 0.7;
}

.mindeck-nav-link:hover .mindeck-nav-link-icon,
.mindeck-nav-link.active .mindeck-nav-link-icon {
  opacity: 1;
}

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

.mindeck-nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.mindeck-nav-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: transparent;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.mindeck-nav-btn:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-focus);
}

.mindeck-nav-btn-primary {
  background: var(--interactive-primary);
  border-color: var(--interactive-primary);
  color: var(--text-inverse);
}

.mindeck-nav-btn-primary:hover {
  background: var(--interactive-primary-hover);
  border-color: var(--interactive-primary-hover);
}

/* Icon button variant */
.mindeck-nav-icon-btn {
  width: 36px;
  height: 36px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mindeck-nav-icon-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.mindeck-nav-icon-btn svg {
  width: 20px;
  height: 20px;
}

/* ============================================
   MOBILE MENU TOGGLE
   ============================================ */

.mindeck-nav-mobile-toggle {
  display: none;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.mindeck-nav-mobile-toggle:hover {
  background: var(--bg-tertiary);
}

.mindeck-nav-mobile-toggle-icon {
  width: 24px;
  height: 24px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
}

.mindeck-nav-mobile-toggle-icon span {
  display: block;
  width: 100%;
  height: 2px;
  background: currentColor;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  transform-origin: center;
}

/* Hamburger to X animation */
.mindeck-nav-mobile-toggle.active .mindeck-nav-mobile-toggle-icon span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mindeck-nav-mobile-toggle.active .mindeck-nav-mobile-toggle-icon span:nth-child(2) {
  opacity: 0;
}

.mindeck-nav-mobile-toggle.active .mindeck-nav-mobile-toggle-icon span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============================================
   MOBILE MENU OVERLAY
   ============================================ */

.mindeck-nav-mobile-menu {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-primary);
  z-index: calc(var(--z-index-sticky) - 1);
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  padding: var(--space-6);
}

.mindeck-nav-mobile-menu.active {
  transform: translateX(0);
}

.mindeck-nav-mobile-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.mindeck-nav-mobile-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  color: var(--text-primary);
  text-decoration: none;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-lg);
  transition: background var(--transition-fast);
}

.mindeck-nav-mobile-link:hover {
  background: var(--bg-tertiary);
}

.mindeck-nav-mobile-link.active {
  background: rgba(33, 150, 243, 0.1);
  color: var(--interactive-primary);
}

.mindeck-nav-mobile-link-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.mindeck-nav-mobile-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-primary);
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */

/* Tablet and below */
@media (max-width: 1023px) {
  .mindeck-nav-links {
    display: none;
  }
  
  .mindeck-nav-mobile-toggle {
    display: flex;
  }
  
  .mindeck-nav-actions {
    gap: var(--space-2);
  }
  
  /* Hide some action buttons on mobile */
  .mindeck-nav-actions .mindeck-nav-btn:not(.mindeck-nav-btn-primary) {
    display: none;
  }
}

/* Mobile */
@media (max-width: 767px) {
  .mindeck-nav {
    height: 56px;
  }
  
  .mindeck-nav-container {
    padding: 0 var(--space-4);
  }
  
  .mindeck-nav-mobile-menu {
    top: 56px;
    padding: var(--space-4);
  }
  
  .mindeck-nav-logo-text {
    font-size: var(--font-size-base);
  }
  
  .mindeck-nav-logo-icon {
    width: 28px;
    height: 28px;
    font-size: var(--font-size-sm);
  }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

/* Focus styles for keyboard navigation */
.mindeck-nav-link:focus-visible,
.mindeck-nav-btn:focus-visible,
.mindeck-nav-icon-btn:focus-visible,
.mindeck-nav-mobile-toggle:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

/* Skip to main content link */
.mindeck-nav-skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  padding: var(--space-3) var(--space-4);
  background: var(--interactive-primary);
  color: var(--text-inverse);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-medium);
  z-index: calc(var(--z-index-sticky) + 1);
  transition: top var(--transition-fast);
}

.mindeck-nav-skip-link:focus {
  top: var(--space-4);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

/* Prevent body scroll when mobile menu is open */
body.nav-mobile-open {
  overflow: hidden;
}

/* Add padding to page content to account for fixed nav */
.mindeck-page-content {
  padding-top: 64px;
}

@media (max-width: 767px) {
  .mindeck-page-content {
    padding-top: 56px;
  }
}