/**
 * SCORM Builder Pagination Styles
 * Styles for page-based navigation and pagination controls
 * Follows existing design system and enhances with pagination-specific elements
 */

/* ========== Enhanced Header Styles ========== */

/* Enhanced Header Title Styling */
.header-title-enhanced {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    background: linear-gradient(135deg, #1a3d3e 0%, #2d1a2a 25%, #3a3a3d 75%, #4a1a1a 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Logo Hover Effect */
.header-logo-hover {
    transition: transform 0.3s ease, filter 0.3s ease;
}

.header-logo-hover:hover {
    transform: scale(1.05);
    filter: drop-shadow(0 4px 8px rgba(74, 155, 142, 0.2));
}

/* Header Container - Enhanced */
.enhanced-header {
    backdrop-filter: blur(12px);
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid rgba(229, 231, 235, 0.8);
}

/* ========== Learning Objectives Grid Layout ========== */

/* Center learning objectives cards when there's only 1 or 2 cards on desktop */
@media (min-width: 1024px) {
    #legacyLearningObjectives .grid {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 1.5rem;
    }

    /* When there's only one objective */
    #legacyLearningObjectives .grid:only-child>div:only-child {
        flex: 0 0 calc(33.333% - 1rem);
        max-width: 400px;
    }

    /* When there are exactly two objectives */
    #legacyLearningObjectives .grid>div:first-child:nth-last-child(2),
    #legacyLearningObjectives .grid>div:first-child:nth-last-child(2)~div {
        flex: 0 0 calc(33.333% - 1rem);
        max-width: 400px;
    }
}

/* ========== Pagination Controls ========== */

/* Absolute Bottom Pagination Bar - contained within main content */
#pagination-controls {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(255, 255, 255, 0.98), rgba(255, 255, 255, 0.95));
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border-color, #e5e7eb);
    padding: 1rem 2rem;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

#pagination-controls.collapsed {
    transform: translateY(calc(100% - 40px));
}

/* Pagination Buttons */
.pagination-button {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--primary-color, #6366f1);
    border-radius: 0.5rem;
    background: var(--primary-color, #6366f1);
    color: white;
    font-weight: 500;
    font-size: 0.875rem;
    transition: all 0.2s ease;
    cursor: pointer;
    min-width: 120px;
    justify-content: center;
}

.pagination-button:hover:not(:disabled) {
    background: var(--primary-hover, #4f46e5);
    border-color: var(--primary-hover, #4f46e5);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.pagination-button:focus {
    outline: 2px solid var(--focus-color, #6366f1);
    outline-offset: 2px;
}

.pagination-button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    background: var(--gray-300, #d1d5db);
    border-color: var(--gray-300, #d1d5db);
    transform: none;
}

.pagination-button:disabled:hover {
    transform: none;
    box-shadow: none;
}

.pagination-button.secondary {
    background: transparent;
    color: var(--primary-color, #6366f1);
    border-color: var(--primary-color, #6366f1);
}

.pagination-button.secondary:hover:not(:disabled) {
    background: var(--primary-color, #6366f1);
    color: white;
}

/* Page Counter and Progress */
.page-counter {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.875rem;
    color: var(--text-secondary, #6b7280);
}

.page-counter-text {
    font-weight: 500;
    color: var(--text-primary, #374151);
}

.page-progress-container {
    width: 200px;
    height: 6px;
    background: var(--gray-200, #e5e7eb);
    border-radius: 3px;
    overflow: hidden;
    position: relative;
}

.page-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color, #6366f1), var(--primary-light, #818cf8));
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 3px;
    position: relative;
}

.page-progress::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }

    100% {
        transform: translateX(100%);
    }
}

/* ========== Main Content Area ========== */

/* Main Content Container for Pagination */
#main-content {
    position: relative;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Main Content Wrapper - needs relative positioning for absolute pagination */
#mainContentWrapper {
    position: relative;
}


/* Page Content Container */
#page-container {
    flex: 1;
    overflow-y: auto;
    padding-bottom: 2rem;
    /* Normal padding for content spacing */
    background: var(--bg-primary, #ffffff);
}

#current-page-content {
    padding: 2rem;
    width: 90%;
    max-width: none;
    margin: 0 auto;
}

/* ========== Page Content Styles ========== */

.page-content {
    animation: slideInUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    min-height: 400px;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Page Transition Effects */
.page-transitioning {
    opacity: 0.5;
    transform: scale(0.98);
    transition: all 0.3s ease;
}

.page-transition-complete {
    opacity: 1;
    transform: scale(1);
}

/* ========== Introduction Page Styles ========== */
.introduction-page {
    text-align: center;
    padding: 0.5rem 2rem;
}

/* Hero section no longer has card wrapper - styles removed */

/* Hero Image Optimization - Smart Height and Width */
.introduction-page .hero-image-full {
    max-width: 95%;
    max-height: min(70vh, 600px);
    display: block;
    margin: 0 auto;
    border-radius: 1.5rem;
    object-fit: contain;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.introduction-page #legacyLearningObjectives {
    background: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);
    border: none;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.introduction-page .learning-objectives {
    background: linear-gradient(135deg, var(--bg-secondary, #f9fafb) 0%, #e5e7eb 100%);
    border-radius: 1rem;
    padding: 2rem;
    text-align: left;
    width: 100%;
    margin: 0 auto;
}

/* ========== Concept Page Styles ========== */
.concept-page {
    line-height: 1.6;
}

.concept-page .concept-header {
    border-bottom: 2px solid var(--primary-color, #6366f1);
    padding-bottom: 1rem;
    margin-bottom: 2rem;
}

.concept-page .concept-title {
    color: var(--text-primary, #111827);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.concept-page .sub-concept-title {
    color: var(--text-secondary, #374151);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

/* Learning Content Styling */
.learning-content {
    font-size: 1.125rem;
    color: var(--text-primary, #374151);
    line-height: 1.7;
}

.learning-content h1,
.learning-content h2,
.learning-content h3,
.learning-content h4,
.learning-content h5,
.learning-content h6 {
    color: var(--text-primary, #111827);
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.learning-content p {
    margin-bottom: 1.5rem;
}

.learning-content ul,
.learning-content ol {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
}

.learning-content li {
    margin-bottom: 0.5rem;
}

.learning-content code {
    background: var(--bg-code, #f3f4f6);
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
    font-family: var(--font-mono, 'Courier New', monospace);
    font-size: 0.875rem;
}

.learning-content pre {
    background: var(--bg-code, #1f2937);
    color: var(--text-code, #f9fafb);
    padding: 1.5rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    margin-bottom: 1.5rem;
}

.learning-content blockquote {
    border-left: 4px solid var(--primary-color, #6366f1);
    padding-left: 1.5rem;
    margin: 1.5rem 0;
    font-style: italic;
    color: var(--text-secondary, #6b7280);
}

/* ========== Embedded Quiz Styles ========== */
.embedded-quiz {
    margin-top: 3rem;
    padding: 2rem;
    background: var(--bg-secondary, #f3f4f6);
    border-radius: 0.75rem;
    border-left: 4px solid var(--primary-color, #6366f1);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.embedded-quiz .quiz-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color, #e5e7eb);
}

.embedded-quiz .quiz-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary, #111827);
}

.embedded-quiz .quiz-icon {
    font-size: 1.5rem;
}

.embedded-quiz .quiz-description {
    color: var(--text-secondary, #6b7280);
    margin-bottom: 1.5rem;
}

/* ========== Task Page Styles ========== */
.task-page {
    width: 100%;
    max-width: none;
    margin: 0 auto;
}

.task-page .task-header {
    background: linear-gradient(135deg, var(--primary-color, #6366f1), var(--primary-light, #818cf8));
    color: white;
    padding: 2rem;
    border-radius: 1rem;
    margin-bottom: 2rem;
    text-align: center;
}

.task-page .task-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.task-page .task-description {
    font-size: 1.125rem;
    opacity: 0.9;
}

.task-page .task-content {
    background: white;
    border-radius: 0.75rem;
    padding: 2rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

/* ========== Enhanced Task Page Styles ========== */
.task-page .task-step {
    margin-bottom: 2rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    border-radius: 1.5rem;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.task-page .task-step:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* Nebula-themed step headers */
.task-page .task-step .bg-blue-50 {
    background: linear-gradient(135deg, #e6fffa 0%, #faf5ff 50%, #e6fffa 100%) !important;
}

.task-page .task-step .from-blue-500 {
    background-color: #4A9B8E !important;
}

.task-page .task-step .to-indigo-500 {
    background-color: #6B4C93 !important;
}

.task-page .task-step .text-blue-500 {
    color: #4A9B8E !important;
}

.task-page .task-step .text-indigo-500 {
    color: #6B4C93 !important;
}

/* Enhanced instruction and code icons */
.task-page .task-step .fa-list-ol {
    color: #4A9B8E !important;
}

.task-page .task-step .fa-code {
    color: #6B4C93 !important;
}

/* Improved button styles */
.task-page .task-step button {
    transition: all 0.3s ease;
}

.task-page .task-step button:hover {
    transform: translateY(-1px);
}

/* ========== Final Quiz Page Styles ========== */
.final-quiz-page {
    /* max-width: 800px; <- REMOVED to allow 90% width */
    width: 100%;
    margin: 0 auto;
    text-align: center;
}

.final-quiz-page .final-quiz-header {
    background: linear-gradient(135deg, var(--success-color, #10b981), var(--success-light, #34d399));
    color: white;
    padding: 3rem 2rem;
    border-radius: 1rem;
    margin-bottom: 2rem;
}

.final-quiz-page .final-quiz-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.final-quiz-page .final-quiz-description {
    font-size: 1.25rem;
    opacity: 0.9;
}

/* Enhanced Quiz Completion Styles - Modern gradient + Professional */
.quiz-results {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    padding: 3rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
    margin: 2rem 0;
}

.quiz-score-display {
    font-size: 4rem;
    font-weight: bold;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
    margin: 1rem 0;
}

.quiz-score-label {
    font-size: 1.25rem;
    color: #fff;
    opacity: 0.9;
    margin-bottom: 2rem;
}

/* Confetti animation for passing scores */
@keyframes confetti-fall {
    0% {
        transform: translateY(-100vh) rotate(0deg);
        opacity: 1;
    }

    100% {
        transform: translateY(100vh) rotate(720deg);
        opacity: 0;
    }
}

.confetti {
    position: absolute;
    width: 10px;
    height: 10px;
    animation: confetti-fall 3s linear forwards;
}

/* Retry button styling */
.retry-quiz-btn {
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    padding: 1rem 2rem;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.retry-quiz-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

/* ========== Enhanced Sidebar Styles for Pagination ========== */

/* Sidebar Item States */

/* Expandable Concept Sections */
.sidebar-item.expanded .sidebar-children {
    max-height: 2000px;
    /* Increased from 500px to accommodate many sub-concepts */
    opacity: 1;
    transition: max-height 0.4s ease-out, opacity 0.3s ease;
}

.sidebar-item.collapsed .sidebar-children {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.sidebar-children {
    padding-left: 1rem;
    margin-top: 0.5rem;
}

.sidebar-child-item {
    padding: 0.5rem 1rem;
    margin: 0.25rem 0;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.875rem;
}

.sidebar-child-item:hover {
    background: var(--bg-hover, #f3f4f6);
    transform: translateX(2px);
}

.sidebar-child-item.current-page {
    background: var(--primary-color, #6366f1);
    color: white;
}

.sidebar-child-item.locked {
    opacity: 0.6;
    cursor: not-allowed;
    background: #f8fafc !important;
    border: 1px solid #e2e8f0 !important;
    border-left: 3px solid #94a3b8 !important;
    color: #64748b !important;
}

.sidebar-child-item.completed::after {
    content: '✓';
    float: right;
    color: var(--success-color, #10b981);
    font-weight: bold;
}

/* ========== Loading and States ========== */

.page-loading {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 300px;
}

.page-loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--gray-200, #e5e7eb);
    border-top: 4px solid var(--primary-color, #6366f1);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

.page-error {
    text-align: center;
    padding: 3rem;
    color: var(--error-color, #ef4444);
}

.page-error-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* ========== Responsive Design ========== */

@media (max-width: 768px) {
    #pagination-controls {
        padding: 0.75rem 1rem;
        flex-direction: column;
        gap: 1rem;
    }

    .pagination-button {
        min-width: 100px;
        padding: 0.625rem 1rem;
        font-size: 0.8rem;
    }

    .page-progress-container {
        width: 150px;
    }

    #current-page-content {
        padding: 1rem;
    }

    .concept-page .concept-title {
        font-size: 1.5rem;
    }

    .concept-page .sub-concept-title {
        font-size: 1.25rem;
    }

    .embedded-quiz {
        margin-top: 2rem;
        padding: 1.5rem;
    }

    .task-page .task-header {
        padding: 1.5rem;
    }

    .task-page .task-title {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .page-progress-container {
        width: 120px;
    }

    .page-counter {
        font-size: 0.75rem;
    }

    .pagination-button {
        min-width: 80px;
        padding: 0.5rem 0.75rem;
        font-size: 0.75rem;
    }

    #current-page-content {
        padding: 0.75rem;
    }

    .embedded-quiz {
        padding: 1rem;
    }
}

/* ========== Page Navigation Styles ========== */
.page-navigation {
    border-top: 1px solid var(--border-color, #e5e7eb);
    margin-top: 3rem;
    padding-top: 2rem;
    background: linear-gradient(to bottom, transparent, rgba(249, 250, 251, 0.5));
}

.page-navigation .flex {
    gap: 1rem;
}

/* Ensure buttons don't wrap on smaller screens */
@media (max-width: 640px) {
    .page-navigation .flex {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch !important;
    }

    .page-navigation button {
        width: 100%;
        justify-content: center;
    }

    .page-navigation .flex>div:first-child:empty,
    .page-navigation .flex>div:last-child:empty {
        display: none;
    }
}

/* ========== Sidebar Visual Distinction Styles ========== */

/* Base sidebar item styles */
.sidebar-item {
    position: relative;
    margin-bottom: 0.25rem;
    border-radius: 0.5rem;
    border: 1px solid transparent;
}

/* Apply transitions only to specific properties for hover effects */
.sidebar-item.introduction,
.sidebar-item.concept,
.sidebar-item.task,
.sidebar-item.final-quiz,
.sidebar-item.sub-concept {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

/* Introduction Items - Modern elegant theme */
.sidebar-item.introduction {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%) !important;
    border: 1px solid #e2e8f0 !important;
    border-left: 4px solid #64748b !important;
    font-weight: 700 !important;
    box-shadow: 0 2px 8px rgba(100, 116, 139, 0.1) !important;
    margin-bottom: 0.5rem !important;
    padding: 0.75rem 1rem !important;
}

.sidebar-item.introduction:hover {
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%) !important;
    transform: translateX(2px);
    box-shadow: 0 4px 12px rgba(100, 116, 139, 0.2) !important;
}

/* Concept Items - Secondary teal theme */
.sidebar-item.concept {
    background: linear-gradient(135deg, #f0fdfa 0%, #ccfbf1 100%) !important;
    border: 1px solid #5eead4 !important;
    border-left: 4px solid #14b8a6 !important;
    font-weight: 600 !important;
    box-shadow: 0 2px 8px rgba(20, 184, 166, 0.15) !important;
    margin-bottom: 0.5rem !important;
    padding: 0.75rem 1rem !important;
}

.sidebar-item.concept:hover {
    background: linear-gradient(135deg, #ccfbf1 0%, #99f6e4 100%) !important;
    transform: translateX(2px);
    box-shadow: 0 4px 12px rgba(20, 184, 166, 0.25) !important;
}

.sidebar-item.concept.expanded {
    background: linear-gradient(135deg, #f3e8ff 0%, #e9d5ff 100%);
    border-color: #a78bfa;
}

/* Task Items - Modern Teal theme */
.sidebar-item.task {
    background: linear-gradient(135deg, #f0fdfa 0%, #e0f2fe 100%) !important;
    border: 1px solid #7dd3fc !important;
    border-left: 4px solid #0891b2 !important;
    font-weight: 500 !important;
    box-shadow: 0 2px 8px rgba(8, 145, 178, 0.15) !important;
    margin-bottom: 0.5rem !important;
    padding: 0.75rem 1rem !important;
}

.sidebar-item.task:hover {
    background: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 100%) !important;
    transform: translateX(2px);
    box-shadow: 0 4px 12px rgba(8, 145, 178, 0.25) !important;
}


/* Final Assessment Items - Dark green theme */
.sidebar-item.final-quiz {
    background: linear-gradient(135deg, #064e3b 0%, #065f46 100%) !important;
    border: 1px solid #047857 !important;
    border-left: 4px solid #065f46 !important;
    font-weight: 700 !important;
    color: white !important;
    box-shadow: 0 2px 8px rgba(6, 95, 70, 0.3) !important;
    margin-bottom: 0.5rem !important;
    padding: 0.75rem 1rem !important;
}

.sidebar-item.final-quiz:hover {
    background: linear-gradient(135deg, #047857 0%, #059669 100%) !important;
    transform: translateX(2px);
    box-shadow: 0 4px 12px rgba(6, 95, 70, 0.4) !important;
}

/* Sub-concept Items */
.sidebar-item.sub-concept {
    background: #ffffff !important;
    border: 1px solid #e5e7eb !important;
    border-left: 3px solid #9ca3af !important;
    font-weight: 500 !important;
    margin-left: 1.5rem !important;
    margin-bottom: 0.5rem !important;
    padding: 0.75rem 1rem !important;
    font-size: 0.9rem !important;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1) !important;
    border-radius: 0.5rem !important;
    min-height: 48px !important;
    display: flex !important;
    align-items: center !important;
    color: #374151 !important;
}

.sidebar-item.sub-concept:hover {
    background: #f9fafb !important;
    border-color: #d1d5db !important;
    border-left-color: #6b7280 !important;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15) !important;
    transform: translateX(2px);
}


/* Locked Items - Themed Colors */
.sidebar-item.locked {
    opacity: 0.8;
    position: relative;
    cursor: not-allowed;
}

/* Introduction Locked - Muted Teal */
.sidebar-item.introduction.locked {
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%) !important;
    border: 1px solid #bbf7d0 !important;
    border-left: 4px solid #86efac !important;
    color: #64748b !important;
}

/* Concept Locked - Muted Teal */
.sidebar-item.concept.locked {
    background: linear-gradient(135deg, #f7fefc 0%, #f0fdfa 100%) !important;
    border: 1px solid #a7f3d0 !important;
    border-left: 4px solid #5eead4 !important;
    color: #64748b !important;
}

/* Task Locked - Muted Blue */
.sidebar-item.task.locked {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%) !important;
    border: 1px solid #e2e8f0 !important;
    border-left: 4px solid #94a3b8 !important;
    color: #64748b !important;
}

/* Final Quiz Locked - Muted Green with visible text */
.sidebar-item.final-quiz.locked {
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%) !important;
    border: 1px solid #bbf7d0 !important;
    border-left: 4px solid #86efac !important;
    color: #64748b !important;
}

/* Fix locked final-quiz title text visibility */
.sidebar-item.final-quiz.locked .sidebar-item-title {
    color: #64748b !important;
}

.sidebar-item.final-quiz.locked .status-icon {
    color: #94a3b8 !important;
}

/* Disable hover effects for locked items */
.sidebar-item.locked:hover {
    transform: none !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05) !important;
}

.sidebar-item.locked:active {
    transform: none !important;
}

/* Enhanced Item Title Typography */
.sidebar-item.introduction .sidebar-item-title {
    font-size: 0.875rem;
    font-weight: 700;
    color: #334155;
}

.sidebar-item.concept .sidebar-item-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: #6b21a8;
}

.sidebar-item.task .sidebar-item-title {
    font-size: 0.875rem;
    font-weight: 500;
    color: #065f46;
}

.sidebar-item.final-quiz .sidebar-item-title {
    font-size: 0.875rem;
    font-weight: 700;
    color: white !important;
}

.sidebar-item.sub-concept .sidebar-item-title {
    font-size: 0.9rem !important;
    font-weight: 500 !important;
    color: #374151 !important;
    line-height: 1.4 !important;
}

/* Enhanced Concept Header Styles - Consolidated Click Area */
.sidebar-item-header {
    cursor: pointer;
    transition: all 0.2s ease;
    border-radius: 0.375rem;
}

.sidebar-item-header:hover {
    background-color: rgba(74, 155, 142, 0.1);
    transform: translateX(2px);
}

.sidebar-item-header:focus {
    outline: 2px solid #4A9B8E;
    outline-offset: 2px;
}

.sidebar-item-header:active {
    transform: translateX(1px);
}

/* Chevron Icon Styles */
.chevron-icon {
    transition: transform 0.2s ease;
    opacity: 0.7;
}

.sidebar-item-header:hover .chevron-icon {
    opacity: 1;
}

/* Ensure concept headers have proper pointer cursor */
.sidebar-item.concept .sidebar-item-header {
    cursor: pointer;
}

/* Enhanced Expandable Chevron Styles */
.sidebar-item.concept .chevron {
    transition: transform 0.2s ease;
    color: #14b8a6;
    width: 16px;
    height: 16px;
}

.sidebar-item.concept .chevron-icon {
    transition: transform 0.2s ease;
}

/* Current Page Highlighting - Consolidated and Enhanced */
.sidebar-item.current-page {
    background: linear-gradient(135deg, #4A9B8E 0%, #059669 100%) !important;
    border: 1px solid #059669 !important;
    border-left: 4px solid #065f46 !important;
    color: white !important;
    transform: translateX(4px);
    box-shadow: 0 4px 12px rgba(74, 155, 142, 0.4) !important;
}

.sidebar-item.current-page .sidebar-item-title {
    color: white !important;
    font-weight: 700 !important;
}

.sidebar-item.current-page .nav-content {
    color: white !important;
}

.sidebar-item.current-page .chevron,
.sidebar-item.current-page .status-icon,
.sidebar-item.current-page .concept-title-area {
    color: white !important;
}

/* Specific current page styling for different item types */
.sidebar-item.introduction.current-page {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%) !important;
    border-color: #047857 !important;
}

.sidebar-item.concept.current-page {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%) !important;
    border-color: #6d28d9 !important;
}

.sidebar-item.task.current-page {
    background: linear-gradient(135deg, #0e7490 0%, #155e75 100%) !important;
    border-color: #0c4a6e !important;
}

.sidebar-item.final-quiz.current-page {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%) !important;
    border-color: #991b1b !important;
}

.sidebar-item.sub-concept.current-page {
    background: linear-gradient(135deg, #4A9B8E 0%, #059669 100%) !important;
    color: white !important;
    font-weight: 600 !important;
    border-color: #059669 !important;
}

/* Status Icons Enhanced */
.sidebar-item.completed .status-icon {
    color: #10b981;
}

/* Themed Locked Status Icons */
.sidebar-item.locked .status-icon {
    color: #64748b;
}

/* Introduction Locked Icon */
.sidebar-item.introduction.locked .status-icon {
    color: #86efac;
}

/* Concept Locked Icon */
.sidebar-item.concept.locked .status-icon {
    color: #5eead4;
}

/* Task Locked Icon */
.sidebar-item.task.locked .status-icon {
    color: #94a3b8;
}

/* Final Quiz Locked Icon */
.sidebar-item.final-quiz.locked .status-icon {
    color: #86efac;
}

/* Sub-concept Locked Icon */
.sidebar-item.sub-concept.locked .status-icon {
    color: #94a3b8;
}

.sidebar-item.current-page .status-icon {
    color: white;
}

/* ========== Locked Item Tooltip Styles ========== */
.lock-tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: #1f2937;
    color: white;
    padding: 0.5rem 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.75rem;
    font-weight: 500;
    white-space: nowrap;
    z-index: 1000;
    opacity: 0;
    animation: fadeIn 0.2s ease-in forwards;
    pointer-events: none;
    max-width: 200px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.lock-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 4px solid transparent;
    border-top-color: #1f2937;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(4px);
    }

    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

.lock-tooltip.hiding {
    animation: fadeOut 0.15s ease-out forwards;
}

@keyframes fadeOut {
    from {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }

    to {
        opacity: 0;
        transform: translateX(-50%) translateY(4px);
    }
}

/* ========== Print Styles ========== */
@media print {
    .page-navigation {
        display: none !important;
    }

    .page-content {
        animation: none;
    }

    .sidebar-navigation {
        display: none !important;
    }
}

/* ========== High Contrast and Accessibility ========== */
@media (prefers-contrast: high) {
    #pagination-controls {
        border-top: 2px solid #000000;
    }

    .pagination-button {
        border-width: 3px;
    }

    .page-progress-container {
        border: 2px solid #000000;
    }
}

@media (prefers-reduced-motion: reduce) {
    .page-content {
        animation: none;
    }

    .page-transitioning {
        transition: none;
    }

    .page-progress {
        transition: none;
    }

    .pagination-button {
        transition: none;
    }

    .sidebar-item.expanded .sidebar-children,
    .sidebar-item.collapsed .sidebar-children {
        transition: none;
    }
}

/* Voice Widget Container Styles - Old version removed (replaced by toggle system) */

/* Dark Mode Support for Old Voice Widget - Removed (replaced by toggle system) */

/* Mobile Responsive Styles for Old Voice Widget - Removed (desktop only) */

/* Voice Widget Animation States - Old version removed (replaced by toggle system) */

/* Voice Widget Accessible Styles - Old version removed (replaced by toggle system) */

/* Learning Mode Toggle Styles */
.learning-mode-toggle {
    margin: 0 0;
}

.learning-mode-toggle .mode-btn {
    position: relative;
    z-index: 10;
    transition: all 0.2s ease;
}

.learning-mode-toggle .mode-btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.learning-mode-toggle .mode-btn:hover {
    z-index: 20;
}

/* Full Width Voice Widget Container - This is OUR wrapper */
.voice-widget-container-full {
    margin: 0 auto;
    max-width: 100%;
    padding: 0;
    /* Remove extra padding to match audio player */
}

.voice-widget-header-full {
    margin-bottom: 0;
    /* Removed 2rem margin to match audio player spacing */
}

.voice-widget-header-full h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.voice-widget-header-full p {
    font-size: 1.125rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

/* VoiceBot Container Wrapper - This is our container that holds the VoiceBot */
.voice-bot-container-full {
    width: 100%;
    height: 200px;
    /* Fixed height required for voice widget canvas to render properly */
    border-radius: 0.75rem;
    overflow: visible;
    position: relative;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    background: white;
}

/* When showing the activation screen (before voice widget loads), allow full content display */
.voice-bot-container-full:has(.voice-activation-screen),
.voice-bot-container-full:has(.voice-activation-screen-video),
.voice-bot-container-full:has(.voice-waiting-screen) {
    height: auto;
    min-height: 200px;
}

/* IMPORTANT: Don't interfere with VoiceBot's internal .voice-bot-container class */
/* Let VoiceBot's own CSS handle its internal styling */
.voice-bot-container-full .voice-bot-container {
    /* Allow VoiceBot to control its own dimensions */
    width: 100% !important;
    height: 200px !important;
    min-height: 200px !important;
    /* Don't override other styling - let VoiceBot handle it */
}

/* Voice Widget Loading State for Full Width */
.voice-widget-loading-full {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 200px;
    /* Reduced from 400px to 200px to match audio player */
    background: white;
    border-radius: 0.75rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.voice-widget-loading-full .animate-spin {
    animation: spin 1s linear infinite;
}

/* Voice Widget Error States for Full Width */
.voice-widget-error-full {
    padding: 1rem;
    text-align: center;
    background: white;
    border-radius: 0.75rem;
    border: 1px solid #bfdbfe;
    height: 200px;
    /* Reduced from 400px to 200px to match audio player */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.voice-widget-error-full h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #1e40af;
    margin-bottom: 1rem;
}

.voice-widget-error-full p {
    font-size: 1rem;
    color: #3730a3;
    margin-bottom: 0;
}

/* Voice Activation and Waiting Screens */
.voice-activation-screen {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.voice-waiting-screen {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

/* Dark Mode Support for Learning Mode Toggle */
@media (prefers-color-scheme: dark) {
    .learning-mode-toggle .mode-btn {
        color: var(--text-secondary);
    }

    .learning-mode-toggle .mode-btn:hover {
        color: var(--text-primary);
    }

    .voice-widget-container-full {
        background: var(--gray-800);
    }

    .voice-widget-header-full h3 {
        color: var(--text-primary);
    }

    .voice-widget-header-full p {
        color: var(--text-secondary);
    }

    /* Voice Bot Container - Dark theme elevation */
    .voice-bot-container-full {
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        background: var(--gray-900);
    }

    /* Don't interfere with VoiceBot's internal theming - let it handle dark mode itself */

    .voice-widget-loading-full {
        background: var(--gray-900);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    }

    .voice-widget-loading-full .text-gray-600 {
        color: var(--text-secondary);
    }

    .voice-widget-error-full {
        background: var(--gray-900);
        border-color: #1e3a8a;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    }

    .voice-widget-error-full h4 {
        color: #3b82f6;
    }

    .voice-widget-error-full p {
        color: #60a5fa;
    }

    /* Voice Activation and Waiting Screens - Dark theme */
    .voice-activation-screen {
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    }

    .voice-waiting-screen {
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    }
}

/* Mobile Responsive Styles for Learning Mode Toggle - Removed (desktop only) */

/* Lesson Content Transition Animations */
.lesson-content {
    transition: all 0.3s ease-in-out;
}

.lesson-content.hidden {
    opacity: 0;
    transform: translateY(10px);
    pointer-events: none;
}

.lesson-content:not(.hidden) {
    opacity: 1;
    transform: translateY(0);
}

/* Read Mode Learning Content Pagination */
.learning-content-pagination {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
}

.learning-content-frame {
    --learning-content-slide-height: 860px;
    position: relative;
    background: transparent;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    overflow: visible;
    overflow-anchor: none;
}

.learning-content-frame.is-paginated {
    min-height: var(--learning-content-slide-height);
}

.learning-content-frame.is-paginated.is-compact-slide {
    min-height: 0;
}

.learning-content-frame.is-single-slide {
    height: auto;
}

.learning-content-stage,
.learning-content-slide {
    padding: 0;
}

.learning-content-frame.is-paginated .learning-content-stage,
.learning-content-frame.is-paginated .learning-content-slide {
    min-height: var(--learning-content-slide-height);
    height: auto;
}

.learning-content-frame.is-paginated.is-compact-slide .learning-content-stage,
.learning-content-frame.is-paginated.is-compact-slide .learning-content-slide {
    min-height: 0;
}

.learning-content-slide {
    display: flex;
    flex-direction: column;
    gap: 0;
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.18s ease, transform 0.18s ease;
}

.learning-content-slide.is-transitioning {
    opacity: 0;
    transform: translateY(4px);
}

.learning-content-slide.is-overflowing {
    height: auto;
}

.learning-content-frame .learning-content-slide > :first-child {
    margin-top: 0;
}

.learning-content-frame .learning-content-slide > :last-child {
    margin-bottom: 0;
}

.learning-content-frame .learning-content-slide h1,
.learning-content-frame .learning-content-slide h2,
.learning-content-frame .learning-content-slide h3,
.learning-content-frame .learning-content-slide h4 {
    margin-top: 0.9rem;
    margin-bottom: 0.45rem;
    line-height: 1.2;
}

.learning-content-frame .learning-content-slide p,
.learning-content-frame .learning-content-slide ul,
.learning-content-frame .learning-content-slide ol,
.learning-content-frame .learning-content-slide blockquote,
.learning-content-frame .learning-content-slide pre,
.learning-content-frame .learning-content-slide table {
    margin-top: 0.35rem;
    margin-bottom: 0.55rem;
}

.learning-content-frame .learning-content-slide li {
    margin-top: 0.15rem;
    margin-bottom: 0.15rem;
}

.learning-content-frame .learning-content-slide ul,
.learning-content-frame .learning-content-slide ol {
    padding-left: 1.2rem;
}

.learning-content-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.65rem;
    padding-top: 0.15rem;
}

.learning-content-controls.hidden {
    display: none;
}

.learning-content-control-btn {
    width: 2rem;
    height: 2rem;
    border-radius: 9999px;
    border: 1px solid rgba(148, 163, 184, 0.18);
    background: rgba(255, 255, 255, 0.8);
    color: #475569;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    box-shadow: none;
    font-size: 0.78rem;
}

.learning-content-control-btn:hover:not(:disabled) {
    border-color: rgba(20, 184, 166, 0.28);
    color: #0f766e;
    background: rgba(240, 253, 250, 0.95);
}

.learning-content-control-btn:disabled {
    opacity: 0.32;
    cursor: not-allowed;
    box-shadow: none;
}

.learning-content-progress {
    min-width: 5.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.28rem;
}

.learning-content-counter {
    font-size: 0.75rem;
    font-weight: 600;
    color: #475569;
    letter-spacing: 0.02em;
}

.learning-content-dots {
    display: inline-flex;
    align-items: center;
    gap: 0.38rem;
    min-height: 0.5rem;
}

.learning-content-dot {
    width: 0.35rem;
    height: 0.35rem;
    border-radius: 9999px;
    background: rgba(148, 163, 184, 0.42);
    transition: all 0.2s ease;
}

.learning-content-dot.is-active {
    width: 0.95rem;
    background: linear-gradient(90deg, #14b8a6 0%, #0f766e 100%);
}

.learning-content-dot-gap {
    width: 0.75rem;
    height: 0.12rem;
    border-radius: 9999px;
    background: rgba(148, 163, 184, 0.45);
}

.learning-content-measurement-sandbox {
    position: absolute;
    left: -9999px;
    top: 0;
    visibility: hidden;
    pointer-events: none;
    z-index: -1;
}

@media (max-width: 767px) {
    .learning-content-stage,
    .learning-content-slide {
        padding: 0;
    }

    .learning-content-controls {
        gap: 0.55rem;
    }

    .learning-content-progress {
        min-width: 5rem;
    }
}

/* VoiceBot Widget Integration for Full Width */
/* Let VoiceBot handle its internal structure completely */

/* Focus Management for Learning Mode Toggle */
.learning-mode-toggle .mode-btn.bg-white:focus-within {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    border-radius: 0.5rem;
}

/* Screen Reader Only Class */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ========== Sub-Concept Page Layout Optimization ========== */
/* Ensures image + audio player fit in single viewport without scrolling */

/* Compact Breadcrumb Header - Positioned at top-left edge */
.sub-concept-breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    margin: 0 0 0.5rem 0;
    /* Break out of parent padding/width constraints to reach left edge */
    margin-left: calc(-5% - 2rem);
    /* -5% (half of 10% unused width) - 2rem (parent padding) */
    margin-right: calc(-5% - 2rem);
    margin-top: -2rem;
    /* Negate parent padding-top */
    padding-left: calc(5% + 2rem);
    /* Restore visual alignment for text */
    color: #374151;
    font-size: 0.875rem;
    background: linear-gradient(to right, rgba(249, 250, 251, 0.95), transparent);
    border-bottom: 1px solid #e5e7eb;
}

.breadcrumb-concept {
    font-weight: 600;
    color: #1f2937;
}

.breadcrumb-separator {
    font-size: 0.65rem;
    color: #9ca3af;
}

.breadcrumb-subconcept {
    font-weight: 500;
    color: #6b7280;
}

/* Sub-concept Image - Styled like hero image */
.sub-concept-content .concept-image {
    margin-bottom: 0.5rem;
    text-align: center;
}

/* Sub-concept image styling - increased height due to compact breadcrumb */
.sub-concept-image {
    max-height: calc(100vh - 310px);
    max-width: 100%;
    width: auto;
    display: block;
    margin: 0 auto;
    border-radius: 1.5rem;
    object-fit: contain;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

/* Compact mode toggle spacing */
.sub-concept-content .learning-mode-toggle {
    margin-bottom: 0;
}

/* Voice widget container compact spacing */
.sub-concept-content .voice-widget-container-full {
    margin-top: 0.5rem !important;
}

/* Prerecorded audio section compact spacing */
.sub-concept-content .prerecorded-audio-section {
    margin-top: 0;
}

/* Listen mode - non-scrollable static layout */
.sub-concept-content .lesson-content:not(.hidden) .voice-widget-container-full {
    position: relative;
}

/* Responsive adjustments for smaller screens */
@media (max-height: 700px) {
    .sub-concept-image {
        max-height: calc(100vh - 290px);
    }
}

@media (max-height: 600px) {
    .sub-concept-image {
        max-height: calc(100vh - 260px);
    }
}

/* ========== Sub-Concept Video Player Styles ========== */
/* Video player styling - matches image styling */
.sub-concept-content .concept-video {
    margin-bottom: 0.5rem;
    text-align: center;
}

.sub-concept-content .concept-video video {
    max-height: 80vh;
    max-width: 100%;
    width: 100%;
    display: block;
    margin: 0 auto;
    border-radius: 1.5rem;
    object-fit: contain;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    background: #000;
}

/* Video embed container styling */
.sub-concept-content .video-embed-container {
    max-height: 80vh;
    margin: 0 auto;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

/* Video caption styling */
.sub-concept-content .concept-video p {
    color: #6b7280;
    font-size: 0.875rem;
    margin-top: 0.75rem;
    font-style: italic;
}

/* Responsive video adjustments */
@media (max-height: 700px) {

    .sub-concept-content .concept-video video,
    .sub-concept-content .video-embed-container {
        max-height: 65vh;
    }
}

@media (max-height: 600px) {

    .sub-concept-content .concept-video video,
    .sub-concept-content .video-embed-container {
        max-height: 60vh;
    }
}