/* Lesson Page Specific Styles */

/* Reading Progress Bar */
.reading-progress-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: #f8f9fa;
    z-index: 1000;
}

.reading-progress {
    height: 100%;
    background: linear-gradient(90deg, #007bff, #28a745);
    width: 0%;
    transition: width 0.3s ease;
}

/* Table of Contents Navigation */
.toc-item {
    margin-bottom: 0.25rem;
}

.toc-item.toc-indent-1 {
    margin-left: 0;
}

.toc-item.toc-indent-2 {
    margin-left: 20px;
}

.toc-item.toc-indent-3 {
    margin-left: 40px;
}

.toc-item.toc-indent-4 {
    margin-left: 60px;
}

.toc-link {
    transition: all 0.2s ease;
    text-decoration: none;
    display: block;
    padding: 0.5rem 0.75rem;
    border-radius: 0.375rem;
}

.toc-link:hover {
    background-color: #e9ecef;
    color: #007bff !important;
}

.toc-link.active {
    background-color: #007bff;
    color: white !important;
    font-weight: 600;
}

/* Lesson Body Styling */
.lesson-body {
    line-height: 1.7;
    font-size: 1.1rem;
}

.lesson-body h2,
.lesson-body h3,
.lesson-body h4 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    scroll-margin-top: 100px;
    color: inherit;
}

.lesson-body p {
    margin-bottom: 1rem;
}

.lesson-body ul,
.lesson-body ol {
    margin-bottom: 1rem;
    padding-left: 2rem;
}

.lesson-body li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

/* Code Blocks */
.lesson-body pre {
    position: relative;
    background-color: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 0.375rem;
    padding: 1rem;
    margin: 1.5rem 0;
    overflow-x: auto;
}

.lesson-body code {
    padding: 0.2em 0.4em;
    border-radius: 0.3em;
    font-family: 'Courier New', monospace;
}

.lesson-body pre code {
    padding: 0;
    border-radius: 0;
    background-color: transparent;
}

/* Copy Code Button */
.copy-code-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: #6c757d;
    color: white;
    border: none;
    border-radius: 4px;
    padding: 5px 8px;
    font-size: 12px;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.copy-code-btn:hover {
    opacity: 1;
}

.copy-code-btn.copied {
    background: #28a745;
}

/* Blockquotes */
.lesson-body blockquote {
    padding: 1rem;
    margin: 1rem 0;
    border-left: 4px solid #007bff;
    background-color: #f8f9fa;
    border-radius: 0.375rem;
    font-style: italic;
}

.lesson-body blockquote p {
    margin: 0;
}

/* Tables */
.lesson-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
}

.lesson-body table th,
.lesson-body table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border: 1px solid #dee2e6;
}

.lesson-body table th {
    background-color: #f8f9fa;
    font-weight: 600;
}

.lesson-body table tr:nth-child(even) {
    background-color: #f8f9fa;
}

/* Images */
.lesson-body img {
    max-width: 100%;
    height: auto;
    border-radius: 0.375rem;
    margin: 1rem 0;
}

/* Links */
.lesson-body a {
    color: #007bff;
    text-decoration: none;
}

.lesson-body a:hover {
    text-decoration: underline;
    color: #0056b3;
}

/* Sidebar Cards */
.lesson-sidebar .card {
    margin-bottom: 1.5rem;
}

.lesson-sidebar .card-header {
    padding: 1rem;
}

.lesson-sidebar .card-header h4 {
    margin: 0;
}

/* List Group Items */
.lesson-sidebar .list-group-item {
    padding: 1rem;
    transition: background-color 0.2s ease;
}

.lesson-sidebar .list-group-item h6 {
    margin-bottom: 0.5rem;
}

.lesson-sidebar .list-group-item small {
    display: block;
    margin-top: 0.5rem;
}

.lesson-sidebar .list-group-item-action:hover {
    background-color: #f8f9fa;
}

/* Responsive Design */
@media (max-width: 768px) {
    .lesson-body {
        font-size: 1rem;
    }

    .display-5 {
        font-size: 1.75rem;
    }

    .lesson-body h2,
    .lesson-body h3,
    .lesson-body h4 {
        margin-top: 1.5rem;
        margin-bottom: 0.75rem;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    .reading-progress-container {
        background-color: #2d3748;
    }

    .reading-progress {
        background: linear-gradient(90deg, #4a9eff, #48bb78);
    }

    .toc-link:hover {
        background-color: var(--border-color);
        color: var(--primary-color) !important;
    }

    .toc-link.active {
        background-color: var(--primary-color);
        color: white !important;
    }

    .lesson-body h2,
    .lesson-body h3,
    .lesson-body h4 {
        color: var(--text-color);
    }

    .lesson-body pre {
        background-color: #1a1a1a;
        border-color: var(--border-color);
        color: #e9ecef;
    }

    .lesson-body code {
        background-color: #1a1a1a;
        color: #e9ecef;
    }

    .lesson-body pre code {
        background-color: transparent;
        color: #e9ecef;
    }

    .copy-code-btn {
        background: #4a5568;
    }

    .copy-code-btn.copied {
        background: #48bb78;
    }

    .lesson-body blockquote {
        background-color: var(--light-color);
        border-left-color: var(--primary-color);
        color: var(--text-color);
    }

    .lesson-body table {
        color: var(--text-color);
    }

    .lesson-body table th {
        background-color: #1a1a1a;
        color: var(--text-color);
        border-color: var(--border-color);
    }

    .lesson-body table td {
        border-color: var(--border-color);
    }

    .lesson-body table tr:nth-child(even) {
        background-color: var(--light-color);
    }

    .lesson-body table tr:hover {
        background-color: var(--border-color);
    }

    .lesson-body img {
        border: 1px solid var(--border-color);
    }

    .lesson-body a {
        color: var(--primary-color);
    }

    .lesson-body a:hover {
        color: #5aacff;
    }

    .lesson-sidebar .list-group-item-action:hover {
        background-color: var(--light-color);
    }

    /* Lesson Sidebar Card Headers for Related/Popular Lessons */
    .lesson-sidebar .card-header.bg-primary {
        background-color: #0d47a1 !important;
        color: #fff !important;
    }

    .lesson-sidebar .card-header.bg-primary .card-title {
        color: #fff !important;
    }

    .lesson-sidebar .card-header.bg-success {
        background-color: #1b5e20 !important;
        color: #fff !important;
    }

    .lesson-sidebar .card-header.bg-success .card-title {
        color: #fff !important;
    }

    /* List Group Items Dark Mode */
    .lesson-sidebar .list-group {
        background-color: transparent;
    }

    .lesson-sidebar .list-group-item {
        background-color: var(--light-color);
        border-color: var(--border-color);
        color: var(--text-color);
    }

    .lesson-sidebar .list-group-item h6 {
        color: var(--text-color);
    }

    .lesson-sidebar .list-group-item-action:hover {
        background-color: var(--border-color);
    }

    .lesson-sidebar .list-group-item .text-muted {
        color: var(--text-muted) !important;
    }

    .lesson-sidebar .list-group-item .text-warning {
        color: var(--warning-color) !important;
    }

    /* Breadcrumb Navigation Dark Mode */
    .breadcrumb {
        background-color: var(--light-color);
        border-color: var(--border-color);
    }

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

    .breadcrumb-item.active {
        color: var(--text-muted);
    }

    /* Navigation Buttons Dark Mode */
    .btn-outline-primary {
        color: var(--primary-color);
        border-color: var(--primary-color);
    }

    .btn-outline-primary:hover {
        background-color: var(--primary-color);
        border-color: var(--primary-color);
        color: #000;
    }

    .btn-outline-primary:focus {
        box-shadow: 0 0 0 0.2rem rgba(74, 158, 255, 0.5);
    }

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

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

    .btn-outline-info {
        color: var(--info-color);
        border-color: var(--info-color);
    }

    .btn-outline-info:hover {
        background-color: var(--info-color);
        border-color: var(--info-color);
        color: #000;
    }

    .btn-outline-success {
        color: var(--success-color);
        border-color: var(--success-color);
    }

    .btn-outline-success:hover {
        background-color: var(--success-color);
        border-color: var(--success-color);
        color: #000;
    }

    /* Alert Messages Dark Mode */
    .alert-success {
        background-color: rgba(72, 187, 120, 0.1);
        border-color: var(--success-color);
        color: #90ee90;
    }

    .alert-success .btn-close {
        filter: brightness(1.2);
    }

    .alert-danger {
        background-color: rgba(252, 129, 129, 0.1);
        border-color: var(--danger-color);
        color: #ff9999;
    }

    .alert-danger .btn-close {
        filter: brightness(1.2);
    }

    .alert-warning {
        background-color: rgba(246, 173, 85, 0.1);
        border-color: var(--warning-color);
        color: #ffd699;
    }

    .alert-warning .btn-close {
        filter: brightness(1.2);
    }

    .alert-info {
        background-color: rgba(99, 179, 237, 0.1);
        border-color: var(--info-color);
        color: #99ccff;
    }

    .alert-info .btn-close {
        filter: brightness(1.2);
    }

    /* Text Color Utilities Dark Mode */
    .text-muted {
        color: var(--text-muted) !important;
    }

    .text-secondary {
        color: var(--text-muted) !important;
    }

    .fw-semibold {
        color: var(--text-color);
    }
}