/* Enhanced Navigation CSS - Extreme UX Quality */

/* Import Design System */
@import url('./design-system.css');

/* Enhanced Navigation Container */
.enhanced-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  z-index: var(--z-40);
  transition: transform var(--duration-300) var(--ease-out);
}

.enhanced-nav.hidden {
  transform: translateY(100%);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-3) var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* Breadcrumbs */
.breadcrumbs {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
  flex-wrap: wrap;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
}

.breadcrumb-link {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--duration-200) var(--ease-out);
  padding: var(--space-1) 0;
}

.breadcrumb-link:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

.breadcrumb-link:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: 0.25rem;
}

.breadcrumb-separator {
  color: var(--text-tertiary);
  margin: 0 var(--space-1);
}

.breadcrumb-current {
  font-weight: 500;
  color: var(--text-primary);
}

/* Reading Progress */
.reading-progress {
  width: 100%;
  height: 4px;
  background: var(--bg-secondary);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
}

.progress-bar-container {
  height: 100%;
  width: 100%;
  position: relative;
}

.progress-bar-fill {
  height: 100%;
  background: var(--color-primary);
  width: 0;
  transition: width var(--duration-300) var(--ease-out);
  position: relative;
}

.progress-bar-fill::after {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-primary-dark);
  box-shadow: 0 0 4px rgb(37 99 235 / 0.5);
}

/* Navigation Controls */
.nav-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
}

.nav-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  color: var(--text-primary);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-200) var(--ease-out);
  min-height: 44px;
  position: relative;
}

.nav-btn:hover:not(:disabled) {
  background: var(--bg-tertiary);
  border-color: var(--border-color-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.nav-btn:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}
/* stylelint-disable no-descending-specificity -- Intentional specificity order */

.nav-btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.nav-btn:disabled {
  opacity: 0.5;
/* stylelint-enable */
  cursor: not-allowed;
}

.nav-btn svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.nav-btn-text {
  display: none;
}

.nav-progress-indicator {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  margin-left: var(--space-2);
}

/* Quick Actions */
.nav-actions {
  display: flex;
  gap: var(--space-2);
  margin-left: auto;
}

.nav-action-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 0.5rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--duration-200) var(--ease-out);
  position: relative;
}

.nav-action-btn:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.nav-action-btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* Tooltips */
[data-tooltip] {
  position: relative;
}

[data-tooltip]::before {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) scale(0.8);
  background: var(--color-gray-900);
  color: white;
  padding: var(--space-1) var(--space-2);
  border-radius: 0.375rem;
  font-size: var(--text-xs);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: all var(--duration-200) var(--ease-out);
  z-index: var(--z-tooltip);
}

[data-tooltip]::after {
  content: '';
  position: absolute;
  bottom: calc(100% + 4px);
  left: 50%;
  transform: translateX(-50%) scale(0.8);
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid var(--color-gray-900);
  opacity: 0;
  transition: all var(--duration-200) var(--ease-out);
}

[data-tooltip]:hover::before,
[data-tooltip]:hover::after {
  opacity: 1;
  transform: translateX(-50%) scale(1);
}

/* Chapter Menu Overlay */
.chapter-menu-overlay {
  position: fixed;
  inset: 0;
  background: rgb(0 0 0 / 0.5);
  backdrop-filter: blur(4px);
  z-index: var(--z-modal);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-300) var(--ease-out);
}

.chapter-menu-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.chapter-menu-content {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 320px;
  max-width: 90vw;
  background: var(--bg-primary);
  box-shadow: var(--shadow-xl);
  transform: translateX(-100%);
  transition: transform var(--duration-300) var(--ease-out);
  display: flex;
  flex-direction: column;
}

.chapter-menu-overlay.active .chapter-menu-content {
  transform: translateX(0);
}

.chapter-menu-header {
  padding: var(--space-4);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.chapter-menu-title {
  font-size: var(--text-xl);
  font-weight: 600;
  margin: 0;
}

.chapter-menu-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: 0.375rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--duration-200) var(--ease-out);
}

.chapter-menu-close:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.chapter-menu-close:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.chapter-menu-nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-2);
}

.chapter-menu-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.chapter-menu-item {
  margin-bottom: var(--space-1);
}

.chapter-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: 0.5rem;
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--duration-200) var(--ease-out);
  position: relative;
}

.chapter-link:hover {
  background: var(--bg-secondary);
}

.chapter-link:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.chapter-menu-item.current .chapter-link {
  background: var(--color-primary);
  color: white;
}

.chapter-number {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border-radius: 0.375rem;
  font-weight: 600;
  font-size: var(--text-sm);
  flex-shrink: 0;
}

.chapter-menu-item.current .chapter-number {
  background: rgb(255 255 255 / 0.2);
}

.chapter-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.chapter-title {
  font-weight: 500;
  line-height: var(--leading-tight);
}

.chapter-author {
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

.chapter-menu-item.current .chapter-author {
  color: rgb(255 255 255 / 0.8);
}

.current-indicator {
  position: absolute;
  right: var(--space-3);
  color: white;
  font-size: var(--text-xs);
}

/* Mobile Optimizations */
@media (width <= 768px) {
  .nav-container {
    padding: var(--space-2) var(--space-3);
    gap: var(--space-2);
  }

  .breadcrumbs {
    display: none;
  }

  .nav-controls {
    gap: var(--space-2);
  }

  .nav-btn {
    padding: var(--space-2);
    font-size: var(--text-xs);
  }

  .nav-btn-text {
    display: none;
  }

  .nav-actions {
    display: none;
  }

  .chapter-menu-content {
    width: 280px;
  }
}

/* Desktop Enhancements */
@media (width >= 769px) {
  .nav-btn-text {
    display: inline;
  }

  .enhanced-nav {
    border-radius: 0.75rem 0.75rem 0 0;
    box-shadow: var(--shadow-lg);
  }

  .nav-container {
    flex-direction: row;
    align-items: center;
    gap: var(--space-4);
  }

  .reading-progress {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
  }

  .breadcrumbs {
    flex: 1;
  }
}

/* Animation for loading state */
@keyframes nav-pulse {
  0%, 100% {
    opacity: 1;
  }

  50% {
    opacity: 0.6;
  }
}

.nav-loading {
  animation: nav-pulse 2s var(--ease-in-out) infinite;
}

/* Hide navigation when scrolling down, show when scrolling up */
.enhanced-nav.nav-hidden {
  transform: translateY(calc(100% - 4px));
}

.enhanced-nav.nav-hidden .reading-progress {
  opacity: 1;
}

/* stylelint-disable media-feature-name-value-no-unknown -- Experimental prefers-contrast support */

/* Accessibility: High contrast mode support */
@media (prefers-contrast: high) {
  .nav-btn {
    border-width: 2px;
  }

  .progress-bar-fill {
    background: var(--text-primary);
  }

  .chapter-menu-overlay {
    backdrop-filter: none;
    background: rgb(0 0 0 / 0.9);
  }
}
/* stylelint-enable */

/* Print styles */
@media print {
  .enhanced-nav {
    display: none;
  }
}