/* Lessons Page Specific Styles */

/* Page Title */
.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 1rem;
    text-align: center;
}

.section-title {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 2rem;
    text-align: center;
}

/* Modern Category Tiles Grid */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

/* Modern Category Card */
.category-card {
    position: relative;
    height: 200px;
    border-radius: 20px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Category card with background image support */
.category-card[data-background] {
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.category-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
}

.category-card:active {
    transform: translateY(-4px) scale(1.01);
}

/* Category Card Inner Container */
.category-card-inner {
    position: relative;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 1.5rem;
    background: linear-gradient(
        135deg,
        rgba(255, 255, 255, 0.95) 0%,
        rgba(255, 255, 255, 0.85) 50%,
        rgba(255, 255, 255, 0.9) 100%
    );
    backdrop-filter: blur(10px);
    border-radius: 20px;
}

/* When background image is present, add overlay */
.category-card[data-background] .category-card-inner {
    background: linear-gradient(
        135deg,
        rgba(0, 0, 0, 0.7) 0%,
        rgba(0, 0, 0, 0.5) 50%,
        rgba(0, 0, 0, 0.6) 100%
    );
    color: white;
}

/* Category Icon */
.category-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: white;
    margin-bottom: 1rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.category-card:hover .category-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Category Content */
.category-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.category-name {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    line-height: 1.2;
    color: var(--text-color);
}

.category-card[data-background] .category-name {
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.category-description {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.4;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.category-card[data-background] .category-description {
    color: rgba(255, 255, 255, 0.9);
}

/* Category Stats */
.category-stats {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
}

.lesson-count {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary-color);
    background: rgba(74, 144, 226, 0.1);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    border: 1px solid rgba(74, 144, 226, 0.2);
}

.category-card[data-background] .lesson-count {
    color: white;
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.lesson-count i {
    font-size: 0.8rem;
}

/* Category Arrow */
.category-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(74, 144, 226, 0.1);
    border-radius: 50%;
    color: var(--primary-color);
    transition: all 0.3s ease;
    border: 1px solid rgba(74, 144, 226, 0.2);
}

.category-card[data-background] .category-arrow {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-color: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.category-card:hover .category-arrow {
    background: var(--primary-color);
    color: white;
    transform: translateX(4px);
    box-shadow: 0 4px 15px rgba(74, 144, 226, 0.4);
}

.category-card[data-background]:hover .category-arrow {
    background: rgba(255, 255, 255, 0.9);
    color: var(--primary-color);
}

/* Filter Card */
.filter-card {
    background: white;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    margin-bottom: 2rem;
}

.filter-card .card-body {
    padding: 2rem;
}

/* Breadcrumb Navigation */
#breadcrumbNav {
    margin-bottom: 2rem;
}

.breadcrumb {
    background: rgba(74, 144, 226, 0.05);
    border-radius: 12px;
    padding: 1rem 1.5rem;
    border: 1px solid rgba(74, 144, 226, 0.1);
}

.breadcrumb-item a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.breadcrumb-item a:hover {
    color: var(--secondary-color);
}

.breadcrumb-item.active {
    color: var(--text-color);
    font-weight: 600;
}

/* Lessons Grid */
.lessons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

/* Enhanced Lesson Cards */
.lesson-card-wrapper {
    height: 100%;
}

.lesson-card {
    height: 100%;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    background: white;
    display: flex;
    flex-direction: column;
}

.lesson-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

/* Lesson Card with Image */
.lesson-card-image {
    height: 200px;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
    overflow: hidden;
}

.lesson-card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        to bottom,
        rgba(0, 0, 0, 0.1) 0%,
        rgba(0, 0, 0, 0.3) 100%
    );
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 1rem;
}

.lesson-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.lesson-badges .badge {
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    font-weight: 600;
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
}

.badge-success {
    background: rgba(40, 167, 69, 0.9) !important;
    color: white;
}

.badge-warning {
    background: rgba(255, 193, 7, 0.9) !important;
    color: #212529;
}

.badge-guest {
    background: rgba(108, 117, 125, 0.9) !important;
    color: white;
}

/* Progress Overlay */
.lesson-progress-overlay {
    display: flex;
    align-items: center;
    justify-content: center;
}

.progress-circle {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--primary-color);
    font-size: 0.85rem;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.5);
}

/* Lesson Card Content */
.lesson-card-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.lesson-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0.75rem;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.lesson-description {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: 1rem;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Lesson Meta */
.lesson-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: var(--text-light);
    font-weight: 500;
}

.meta-item i {
    color: var(--primary-color);
    font-size: 0.8rem;
}

/* Lesson Card Footer */
.lesson-card-footer {
    margin-top: auto;
}

/* Progress Bar for cards without images */
.lesson-progress-bar {
    position: relative;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 3px;
    transition: width 0.3s ease;
}

.progress-text {
    position: absolute;
    top: -25px;
    right: 0;
    font-size: 0.75rem;
    color: var(--text-light);
    font-weight: 600;
}

/* Lesson Buttons */
.lesson-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    border: none;
    text-decoration: none;
    cursor: pointer;
}

.lesson-btn:hover {
    text-decoration: none;
    transform: translateY(-2px);
}

.btn-primary.lesson-btn {
    background: var(--primary-color);
    color: white;
}

.btn-primary.lesson-btn:hover {
    background: var(--secondary-color);
    color: white;
    box-shadow: 0 6px 20px rgba(74, 144, 226, 0.3);
}

.btn-warning.lesson-btn {
    background: #f5a623;
    color: white;
}

.btn-warning.lesson-btn:hover {
    background: #e09612;
    color: white;
    box-shadow: 0 6px 20px rgba(245, 166, 35, 0.3);
}

.btn-secondary.lesson-btn {
    background: #6c757d;
    color: white;
}

.btn-secondary.lesson-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Lesson Card without Image */
.lesson-card-no-image {
    background: white;
}

.lesson-card-no-image .lesson-card-content {
    padding: 2rem 1.5rem;
}

/* Locked State */
.lesson-card.locked {
    opacity: 0.8;
}

.lesson-card.locked .lesson-card-overlay {
    background: linear-gradient(
        to bottom,
        rgba(0, 0, 0, 0.3) 0%,
        rgba(0, 0, 0, 0.5) 100%
    );
}

/* Loading and Error States */
#loadingSpinner {
    padding: 4rem 0;
}

.spinner-border {
    width: 3rem;
    height: 3rem;
}

.no-lessons-card {
    background: white;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    padding: 3rem 2rem;
    text-align: center;
}

.no-lessons-card i {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.no-lessons-card h4 {
    color: var(--text-color);
    margin-bottom: 1rem;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    box-shadow: 0 4px 20px rgba(74, 144, 226, 0.3);
    transition: all 0.3s ease;
    z-index: 1000;
}

.back-to-top:hover {
    background: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(74, 144, 226, 0.4);
}

/* Active Filters Display */
#activeFiltersDisplay {
    font-size: 0.9rem;
    color: var(--text-light);
    font-style: italic;
}

/* Form Controls */
.form-select,
.form-control {
    border-radius: 8px;
    border: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    transition: all 0.2s ease;
}

.form-select:focus,
.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(74, 144, 226, 0.25);
}

/* Button Improvements */
.btn {
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.2s ease;
    padding: 0.75rem 1.5rem;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn-primary {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background: var(--secondary-color);
    border-color: var(--secondary-color);
    box-shadow: 0 4px 15px rgba(74, 144, 226, 0.3);
}

.btn-outline-secondary {
    border-color: var(--border-color);
    color: var(--text-light);
}

.btn-outline-secondary:hover {
    background: var(--text-light);
    border-color: var(--text-light);
    color: white;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .categories-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 1.5rem;
    }
    
    .lessons-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .page-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .category-card {
        height: 160px;
    }
    
    .category-card-inner {
        padding: 1.25rem;
    }
    
    .category-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
        margin-bottom: 0.75rem;
    }
    
    .category-name {
        font-size: 1.2rem;
    }
    
    .category-description {
        font-size: 0.9rem;
        -webkit-line-clamp: 1;
    }
    
    .lessons-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .lesson-card-image {
        height: 160px;
    }
    
    .lesson-card-content {
        padding: 1.25rem;
    }
    
    .lesson-title {
        font-size: 1.1rem;
        -webkit-line-clamp: 1;
    }
    
    .lesson-description {
        font-size: 0.9rem;
        -webkit-line-clamp: 2;
    }
    
    .lesson-meta {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .filter-card .card-body {
        padding: 1.5rem;
    }
    
    .filter-card .row {
        gap: 1rem;
    }
    
    .filter-card .col-md-3,
    .filter-card .col-md-2 {
        margin-bottom: 1rem;
    }
    
    .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 45px;
        height: 45px;
    }
}

@media (max-width: 576px) {
    .page-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.25rem;
    }
    
    .category-card {
        height: 140px;
    }
    
    .category-card-inner {
        padding: 1rem;
    }
    
    .category-icon {
        width: 40px;
        height: 40px;
        font-size: 1.25rem;
        margin-bottom: 0.5rem;
    }
    
    .category-name {
        font-size: 1rem;
        margin-bottom: 0.25rem;
    }
    
    .category-description {
        font-size: 0.8rem;
        margin-bottom: 0.5rem;
    }
    
    .lesson-count {
        font-size: 0.8rem;
        padding: 0.3rem 0.6rem;
    }
    
    .category-arrow {
        width: 35px;
        height: 35px;
    }
    
    .lesson-card-image {
        height: 140px;
    }
    
    .lesson-card-content {
        padding: 1rem;
    }
    
    .lesson-title {
        font-size: 1rem;
    }
    
    .lesson-description {
        font-size: 0.85rem;
    }
    
    .lesson-btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.9rem;
    }
    
    .filter-card .card-body {
        padding: 1rem;
    }
    
    .breadcrumb {
        padding: 0.75rem 1rem;
    }
}

/* Animation Classes */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-in {
    animation: fadeInUp 0.6s ease-out forwards;
}

/* Staggered Animation Delays */
.category-card:nth-child(1) { animation-delay: 0.1s; }
.category-card:nth-child(2) { animation-delay: 0.2s; }
.category-card:nth-child(3) { animation-delay: 0.3s; }
.category-card:nth-child(4) { animation-delay: 0.4s; }
.category-card:nth-child(5) { animation-delay: 0.5s; }
.category-card:nth-child(6) { animation-delay: 0.6s; }
.category-card:nth-child(7) { animation-delay: 0.7s; }

/* Focus States for Accessibility */
.category-card:focus,
.lesson-card:focus {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

.category-card:focus-visible,
.lesson-card:focus-visible {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .category-card,
    .lesson-card {
        border: 2px solid var(--text-color);
    }
    
    .category-card-inner,
    .lesson-card-content {
        background: white;
        color: var(--text-color);
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    .category-card,
    .lesson-card,
    .category-icon,
    .category-arrow,
    .lesson-btn,
    .back-to-top {
        transition: none;
    }
    
    .category-card:hover,
    .lesson-card:hover {
        transform: none;
    }
    
    .animate-in {
        animation: none;
    }
}