/**
 * HelpTrickBD Pro - Single Article Reading & Student Utilities Stylesheet
 * TOC, Reading Bar, Font Resizer, Focus Mode, MCQ Engine, Code Runner & Print Watermark.
 */

/* -------------------------------------------------------------
 * 0. Single Page 2-Column Grid Layout (Guarantees Sidebar Visibility on >= 840px)
 * ------------------------------------------------------------- */
.ht-single-site .ht-layout-row {
    display: grid !important;
    grid-template-columns: minmax(0, 7fr) minmax(0, 3fr) !important;
    gap: 30px !important;
    align-items: start !important;
    width: 100% !important;
    margin-bottom: 48px;
}

.ht-single-site .ht-article-col {
    min-width: 0 !important;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
}

.ht-single-site .ht-sidebar-area {
    min-width: 0 !important;
    width: 100% !important;
    display: block !important;
    box-sizing: border-box !important;
}

@media (max-width: 1180px) {
    .ht-single-site .ht-layout-row {
        grid-template-columns: minmax(0, 7fr) minmax(0, 3fr) !important;
        gap: 24px !important;
    }
}

@media (max-width: 991px) {
    .ht-single-site .ht-layout-row {
        grid-template-columns: minmax(0, 7fr) minmax(0, 3fr) !important;
        gap: 20px !important;
    }
}

@media (max-width: 840px) {
    .ht-single-site .ht-layout-row {
        grid-template-columns: 1fr !important;
        gap: 24px !important;
    }
    .ht-single-site .ht-sidebar-area {
        width: 100% !important;
    }
}

/* -------------------------------------------------------------
 * 1. Live Reading Progress Bar
 * ------------------------------------------------------------- */
.ht-reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3.5px;
    background: transparent;
    z-index: 99999;
}

.ht-progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--ht-primary) 0%, var(--ht-accent) 100%);
    transition: width 0.05s ease-out;
}

/* -------------------------------------------------------------
 * 2. Breadcrumbs
 * ------------------------------------------------------------- */
.ht-breadcrumbs {
    margin: 18px 0 24px 0;
    font-size: 0.85rem;
    color: var(--ht-text-muted);
}

.ht-breadcrumbs ol {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    list-style: none;
}

.ht-breadcrumbs a {
    color: var(--ht-text-secondary);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.ht-breadcrumbs a:hover {
    color: var(--ht-primary);
}

.ht-crumb-sep-item {
    display: inline-flex;
    align-items: center;
    color: var(--ht-text-muted);
    opacity: 0.6;
}

.ht-crumb-current {
    color: var(--ht-text-muted);
    font-weight: 500;
}

/* -------------------------------------------------------------
 * 3. Article Header & Meta
 * ------------------------------------------------------------- */
.ht-article-col {
    background: var(--ht-surface-card);
    border: 1px solid var(--ht-surface-border);
    border-radius: 18px;
    padding: 44px 48px;
    box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.02);
}

[data-theme="dark"] .ht-article-col {
    background: #1e293b;
    border-color: #334155;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
}

.ht-header-top-badges {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
}

.ht-article-title {
    font-size: 2.15rem;
    font-weight: 800;
    line-height: 1.42;
    color: var(--ht-text-primary);
    margin-bottom: 20px;
    letter-spacing: -0.015em;
    font-family: var(--ht-font-bn) !important;
}

.ht-article-meta-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    padding: 14px 0;
    border-top: 1px solid var(--ht-surface-border);
    border-bottom: 1px solid var(--ht-surface-border);
    margin-bottom: 16px;
}

.ht-meta-author {
    display: flex;
    align-items: center;
    gap: 10px;
}

.ht-author-avatar-sm {
    border-radius: var(--ht-radius-full);
}

.ht-author-text {
    font-size: 0.9rem;
}

.ht-author-by {
    color: var(--ht-text-muted);
}

.ht-author-link {
    font-weight: 700;
    color: var(--ht-text-primary);
}

.ht-author-link:hover {
    color: var(--ht-primary);
}

.ht-meta-stats {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 0.82rem;
    color: var(--ht-text-muted);
}

.ht-updated-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--ht-surface-hover);
    border: 1px solid var(--ht-surface-border);
    font-size: 0.8rem;
    font-weight: 500;
    padding: 4px 12px;
    border-radius: var(--ht-radius-full);
    color: var(--ht-text-muted);
    margin-bottom: 20px;
}

/* -------------------------------------------------------------
 * 4. Student Reading Toolbelt
 * ------------------------------------------------------------- */
.ht-reading-toolbelt {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    background: var(--ht-surface-hover);
    border: 1px solid var(--ht-surface-border);
    padding: 10px 16px;
    border-radius: var(--ht-radius-md);
    margin-bottom: 26px;
}

.ht-toolbelt-group {
    display: flex;
    align-items: center;
    gap: 6px;
}

.ht-tool-label {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--ht-text-muted);
}

.ht-resizer-btn {
    padding: 3px 10px;
    font-size: 0.82rem;
    font-weight: 700;
    border-radius: var(--ht-radius-sm);
    background: var(--ht-surface);
    border: 1px solid var(--ht-surface-border);
    color: var(--ht-text-secondary);
}

.ht-resizer-btn:hover, .ht-resizer-btn.ht-active {
    background: var(--ht-primary);
    color: #fff;
    border-color: var(--ht-primary);
}

.ht-toolbelt-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    font-size: 0.82rem;
    font-weight: 600;
    border-radius: var(--ht-radius-sm);
    background: var(--ht-surface);
    border: 1px solid var(--ht-surface-border);
    color: var(--ht-text-secondary);
    transition: var(--ht-transition);
}

.ht-toolbelt-btn:hover, .ht-toolbelt-btn.ht-active {
    background: var(--ht-primary-light);
    color: var(--ht-primary);
    border-color: var(--ht-primary);
}

/* Dynamic Font Resizing */
body.ht-font-18 .ht-entry-content {
    font-size: 1.12rem;
    line-height: 1.8;
}

body.ht-font-20 .ht-entry-content {
    font-size: 1.25rem;
    line-height: 1.9;
}

/* -------------------------------------------------------------
 * 5. Auto Table of Contents (সূচিপত্র)
 * ------------------------------------------------------------- */
.ht-toc-container {
    background: var(--ht-surface);
    border: 1px solid var(--ht-surface-border);
    border-left: 4px solid var(--ht-primary);
    border-radius: var(--ht-radius-md);
    margin: 24px 0 32px 0;
    overflow: hidden;
}

.ht-toc-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    cursor: pointer;
    background: var(--ht-surface-hover);
}

.ht-toc-title-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1rem;
    font-weight: 700;
    color: var(--ht-text-primary);
}

.ht-toc-toggle {
    color: var(--ht-text-muted);
    transition: transform 0.2s ease;
}

.ht-toc-container.ht-collapsed .ht-toc-toggle {
    transform: rotate(-90deg);
}

.ht-toc-container.ht-collapsed .ht-toc-nav {
    display: none;
}

.ht-toc-nav {
    padding: 14px 20px 18px 24px;
}

.ht-toc-list {
    list-style: decimal;
    padding-left: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ht-toc-list a {
    font-size: 0.95rem;
    color: var(--ht-text-secondary);
    font-weight: 500;
}

.ht-toc-list a:hover, .ht-toc-list a.ht-toc-active {
    color: var(--ht-primary);
    font-weight: 700;
}

.ht-toc-sub-list {
    list-style: circle;
    padding-left: 18px;
    margin-top: 6px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

/* -------------------------------------------------------------
 * 6. Article Body Typography & Gutenberg Blocks
 * ------------------------------------------------------------- */
.ht-entry-content {
    font-size: 1.12rem;
    line-height: 1.95;
    color: var(--ht-text-primary);
    font-family: var(--ht-font-bn) !important;
    word-break: break-word;
}

.ht-entry-content,
.ht-entry-content *,
.ht-entry-content p,
.ht-entry-content span,
.ht-entry-content li,
.ht-entry-content h1,
.ht-entry-content h2,
.ht-entry-content h3,
.ht-entry-content h4,
.ht-entry-content h5,
.ht-entry-content h6,
.ht-entry-content table,
.ht-entry-content th,
.ht-entry-content td,
.ht-entry-content caption,
.ht-entry-content blockquote {
    font-family: var(--ht-font-bn) !important;
}

.ht-entry-content code,
.ht-entry-content pre,
.ht-entry-content kbd {
    font-family: var(--ht-font-code) !important;
}

.ht-entry-content p {
    margin-bottom: 22px;
    font-size: 1.12rem;
    line-height: 1.95;
    color: var(--ht-text-primary);
}

/* First lead paragraph with elegant prominence */
.ht-entry-content > p:first-of-type {
    font-size: 1.18rem;
    line-height: 2.0;
    color: var(--ht-text-secondary);
    font-weight: 500;
}

/* =============================================================
 * In-Content & Internal Link Styling (Ultra-High Visibility)
 * ============================================================= */
.ht-entry-content a {
    color: #1d4ed8 !important;
    font-weight: 600 !important;
    text-decoration: underline !important;
    text-decoration-color: rgba(29, 78, 216, 0.45) !important;
    text-decoration-thickness: 1.8px !important;
    text-underline-offset: 4px !important;
    border-radius: 4px;
    padding: 1px 4px;
    margin: -1px -4px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1) !important;
    display: inline;
}

.ht-entry-content a:hover,
.ht-entry-content a:focus {
    color: #1e3a8a !important;
    text-decoration-color: #1d4ed8 !important;
    text-decoration-thickness: 2.2px !important;
    background-color: #eff6ff !important;
    box-shadow: 0 1px 3px rgba(29, 78, 216, 0.12) !important;
}

.ht-entry-content a:active {
    background-color: #dbeafe !important;
}

/* Dark Mode In-Content & Internal Links */
[data-theme="dark"] .ht-entry-content a {
    color: #60a5fa !important;
    text-decoration-color: rgba(96, 165, 250, 0.45) !important;
}

[data-theme="dark"] .ht-entry-content a:hover,
[data-theme="dark"] .ht-entry-content a:focus {
    color: #93c5fd !important;
    text-decoration-color: #60a5fa !important;
    background-color: rgba(37, 99, 235, 0.22) !important;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.35) !important;
}

[data-theme="dark"] .ht-entry-content a:active {
    background-color: rgba(37, 99, 235, 0.35) !important;
}

/* Buttons / Header anchors exemption */
.ht-entry-content .ht-btn,
.ht-entry-content a.button,
.ht-entry-content a.wp-block-button__link {
    text-decoration: none !important;
    padding: 12px 24px !important;
    margin: 0 !important;
}

.ht-entry-content h1 a,
.ht-entry-content h2 a,
.ht-entry-content h3 a,
.ht-entry-content h4 a {
    text-decoration: none !important;
    color: inherit !important;
    padding: 0 !important;
    margin: 0 !important;
}

.ht-entry-content h1 a:hover,
.ht-entry-content h2 a:hover,
.ht-entry-content h3 a:hover,
.ht-entry-content h4 a:hover {
    color: var(--ht-primary) !important;
    background: transparent !important;
    box-shadow: none !important;
}

/* Headings with Signature Brand Accent Lines */
.ht-entry-content h2 {
    font-size: 1.68rem;
    font-weight: 800;
    line-height: 1.42;
    margin: 44px 0 20px 0;
    padding: 2px 0 2px 16px;
    border-left: 5px solid #2563eb;
    border-bottom: none;
    color: var(--ht-text-primary);
    letter-spacing: -0.01em;
}

[data-theme="dark"] .ht-entry-content h2 {
    border-left-color: #3b82f6;
    color: #f8fafc;
}

.ht-entry-content h3 {
    font-size: 1.35rem;
    font-weight: 700;
    line-height: 1.45;
    margin: 32px 0 16px 0;
    padding-left: 16px;
    position: relative;
    color: var(--ht-text-primary);
}

.ht-entry-content h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 6px;
    width: 4px;
    height: 18px;
    background: #3b82f6;
    border-radius: 2px;
}

[data-theme="dark"] .ht-entry-content h3::before {
    background: #60a5fa;
}

.ht-entry-content h4 {
    font-size: 1.15rem;
    font-weight: 700;
    line-height: 1.5;
    margin: 24px 0 12px 0;
    color: var(--ht-text-secondary);
}

.ht-entry-content ul, .ht-entry-content ol {
    margin: 0 0 24px 28px;
}

.ht-entry-content li {
    margin-bottom: 10px;
    line-height: 1.88;
    color: var(--ht-text-primary);
}

/* Blockquotes with Soft Accent Tint */
.ht-entry-content blockquote {
    background: linear-gradient(135deg, #eff6ff 0%, #f8fafc 100%);
    border-left: 5px solid #2563eb;
    padding: 20px 24px;
    border-radius: 0 12px 12px 0;
    margin: 30px 0;
    font-style: normal;
    color: #1e3a8a;
    font-size: 1.08rem;
    line-height: 1.88;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.05);
}

[data-theme="dark"] .ht-entry-content blockquote {
    background: rgba(30, 41, 59, 0.75) !important;
    border-left-color: #3b82f6 !important;
    color: #93c5fd !important;
    box-shadow: none !important;
}

.ht-entry-content img {
    border-radius: var(--ht-radius-md);
    margin: 24px auto;
    max-width: 100% !important;
    height: auto !important;
}

.ht-entry-content figure {
    margin: 24px 0;
    text-align: center;
}

.ht-entry-content figcaption {
    font-size: 0.85rem;
    color: var(--ht-text-muted);
    margin-top: 8px;
}

/* Responsive Table Wrapper */
.ht-table-responsive,
.ht-table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 24px 0;
    border-radius: var(--ht-radius-md);
    border: 1px solid var(--ht-surface-border);
    background: var(--ht-surface);
    box-shadow: var(--ht-shadow-sm);
    width: 100%;
    max-width: 100%;
}

.ht-table-scroll-hint {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--ht-primary);
    padding: 8px 14px;
    background: var(--ht-primary-light);
    border-bottom: 1px solid var(--ht-primary-border);
}

.ht-entry-content table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 1rem;
    min-width: 580px;
    border: 1px solid var(--ht-surface-border);
    border-radius: 12px;
    overflow: hidden;
    margin: 28px 0;
}

.ht-entry-content th, .ht-entry-content td {
    padding: 14px 18px;
    border-bottom: 1px solid var(--ht-surface-border);
    border-right: 1px solid var(--ht-surface-border);
    text-align: left;
    font-family: var(--ht-font-bn) !important;
}

.ht-entry-content th:last-child,
.ht-entry-content td:last-child {
    border-right: none;
}

.ht-entry-content tr:last-child td {
    border-bottom: none;
}

.ht-entry-content th {
    background: #f1f5f9;
    font-weight: 700;
    color: var(--ht-text-primary);
    border-bottom: 2px solid #cbd5e1;
}

.ht-entry-content tr:nth-child(even) td {
    background: #f8fafc;
}

.ht-entry-content tr:hover td {
    background: #eff6ff;
}

[data-theme="dark"] .ht-entry-content th {
    background: #0f172a;
    border-bottom-color: #334155;
    color: #f8fafc;
}

[data-theme="dark"] .ht-entry-content tr:nth-child(even) td {
    background: rgba(255, 255, 255, 0.02);
}

[data-theme="dark"] .ht-entry-content tr:hover td {
    background: rgba(37, 99, 235, 0.12);
}

/* -------------------------------------------------------------
 * 7. Academic Alert / Notice Boxes
 * ------------------------------------------------------------- */
.ht-alert-box {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 16px 20px;
    border-radius: var(--ht-radius-md);
    margin: 24px 0;
    border: 1px solid transparent;
}

.ht-alert-info {
    background: var(--ht-info-light);
    border-color: rgba(2, 132, 199, 0.3);
    color: #0369a1;
}

.ht-alert-warning {
    background: var(--ht-warning-light);
    border-color: rgba(245, 158, 11, 0.3);
    color: #b45309;
}

.ht-alert-routine {
    background: var(--ht-primary-light);
    border-color: var(--ht-primary-border);
    color: var(--ht-primary);
}

/* -------------------------------------------------------------
 * 8. Interactive MCQ / Quiz Reveal Accordion
 * ------------------------------------------------------------- */
.ht-mcq-card {
    background: var(--ht-surface);
    border: 1px solid var(--ht-surface-border);
    border-radius: var(--ht-radius-md);
    padding: 20px;
    margin: 24px 0;
    box-shadow: var(--ht-shadow-sm);
}

.ht-mcq-question {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 14px;
    color: var(--ht-text-primary);
}

.ht-mcq-options {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 14px;
}

.ht-mcq-option {
    padding: 8px 14px;
    background: var(--ht-surface-hover);
    border: 1px solid var(--ht-surface-border);
    border-radius: var(--ht-radius-sm);
    cursor: pointer;
    transition: var(--ht-transition);
}

.ht-mcq-option:hover {
    border-color: var(--ht-primary);
}

.ht-mcq-reveal-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--ht-surface-hover);
    border: 1px solid var(--ht-surface-border);
    color: var(--ht-text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: var(--ht-radius-sm);
}

.ht-mcq-answer {
    display: none;
    margin-top: 14px;
    padding: 12px 16px;
    background: var(--ht-accent-light);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--ht-radius-sm);
    color: #065f46;
}

.ht-mcq-answer.ht-open {
    display: block;
}

/* -------------------------------------------------------------
 * 9. Subject Syllabus & Study Checklist
 * ------------------------------------------------------------- */
.ht-checklist-box {
    background: var(--ht-surface);
    border: 1px solid var(--ht-surface-border);
    border-radius: var(--ht-radius-md);
    padding: 20px;
    margin: 24px 0;
}

.ht-checklist-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.ht-checklist-items {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ht-checklist-item {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 0.95rem;
}

.ht-checklist-item.ht-checked {
    text-decoration: line-through;
    color: var(--ht-text-muted);
}

/* -------------------------------------------------------------
 * 10. Keyword Glossary Tooltips (.ht-term)
 * ------------------------------------------------------------- */
.ht-term {
    border-bottom: 1.5px dashed var(--ht-primary);
    cursor: help;
    position: relative;
    color: var(--ht-primary);
    font-weight: 600;
}

.ht-term-tooltip {
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    background: #0f172a;
    color: #fff;
    font-size: 0.82rem;
    font-weight: 400;
    padding: 8px 12px;
    border-radius: var(--ht-radius-sm);
    white-space: normal;
    width: 220px;
    box-shadow: var(--ht-shadow-md);
    display: none;
    z-index: 100;
    text-align: center;
}

.ht-term:hover .ht-term-tooltip {
    display: block;
}

/* -------------------------------------------------------------
 * 11. ICT Live Code Runner Tab
 * ------------------------------------------------------------- */
.ht-code-runner {
    background: #090d16;
    border: 1px solid #1e293b;
    border-radius: var(--ht-radius-md);
    margin: 24px 0;
    overflow: hidden;
}

.ht-runner-tabs {
    display: flex;
    align-items: center;
    background: #111827;
    border-bottom: 1px solid #1e293b;
}

.ht-runner-tab-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    font-size: 0.85rem;
    font-weight: 600;
    color: #94a3b8;
    background: transparent;
    border-right: 1px solid #1e293b;
}

.ht-runner-tab-btn.ht-active {
    background: #090d16;
    color: var(--ht-accent);
}

.ht-runner-copy-btn {
    margin-left: auto;
    padding: 8px 14px;
    color: #94a3b8;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
}

.ht-runner-pane {
    display: none;
    padding: 16px;
}

.ht-runner-pane.ht-active {
    display: block;
}

.ht-runner-preview-frame {
    width: 100%;
    min-height: 200px;
    background: #fff;
    border: none;
    border-radius: var(--ht-radius-sm);
}

/* -------------------------------------------------------------
 * 12. Animated PDF Download Button with Timer
 * ------------------------------------------------------------- */
.ht-download-box {
    background: var(--ht-surface);
    border: 1px solid var(--ht-surface-border);
    border-radius: var(--ht-radius-md);
    padding: 24px;
    text-align: center;
    margin: 32px 0;
}

.ht-download-timer-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--ht-primary);
    color: #fff;
    font-size: 1rem;
    font-weight: 700;
    padding: 12px 24px;
    border-radius: var(--ht-radius-md);
    box-shadow: var(--ht-shadow-md);
    transition: var(--ht-transition);
}

.ht-download-timer-btn:hover {
    background: var(--ht-primary-hover);
    transform: translateY(-2px);
}

/* -------------------------------------------------------------
 * 13. Academic Citation Card & Community Box
 * ------------------------------------------------------------- */
.ht-citation-card {
    background: var(--ht-surface-card);
    border: 1px solid var(--ht-surface-border);
    border-left: 4px solid var(--ht-primary);
    border-radius: var(--ht-radius-md);
    padding: 24px;
    margin: 36px 0;
    box-shadow: var(--ht-shadow-sm);
}

.ht-citation-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 16px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--ht-surface-border);
}

.ht-citation-title-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
}

.ht-citation-icon-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: var(--ht-radius-sm);
    background: var(--ht-primary-light);
    color: var(--ht-primary);
    flex-shrink: 0;
}

.ht-citation-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--ht-text-primary);
    margin: 0;
    line-height: 1.3;
}

.ht-citation-subtitle {
    display: block;
    font-size: 0.78rem;
    color: var(--ht-text-muted);
    font-weight: 500;
}

.ht-citation-verified-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: #ecfdf5;
    color: #059669;
    border: 1px solid #a7f3d0;
    border-radius: var(--ht-radius-full);
    font-size: 0.76rem;
    font-weight: 700;
}

[data-theme="dark"] .ht-citation-verified-badge {
    background: rgba(5, 150, 105, 0.15);
    border-color: rgba(5, 150, 105, 0.3);
    color: #34d399;
}

.ht-citation-meta-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px 16px;
    margin-bottom: 18px;
    background: var(--ht-surface-hover);
    padding: 12px 16px;
    border-radius: var(--ht-radius-sm);
}

@media (max-width: 640px) {
    .ht-citation-meta-grid {
        grid-template-columns: 1fr;
    }
}

.ht-cite-meta-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.ht-cite-meta-label {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--ht-text-muted);
    font-weight: 700;
}

.ht-cite-meta-val {
    font-size: 0.85rem;
    color: var(--ht-text-secondary);
    font-weight: 600;
}

.ht-cite-meta-val code {
    background: var(--ht-surface);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.82rem;
    border: 1px solid var(--ht-surface-border);
}

.ht-citation-tabs-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    overflow-x: auto;
    scrollbar-width: none;
}

.ht-citation-tabs-nav::-webkit-scrollbar {
    display: none;
}

.ht-cite-tab-btn {
    padding: 5px 14px;
    font-size: 0.82rem;
    font-weight: 600;
    border-radius: var(--ht-radius-full);
    background: var(--ht-surface-hover);
    color: var(--ht-text-secondary);
    border: 1px solid var(--ht-surface-border);
    cursor: pointer;
    transition: var(--ht-transition);
    white-space: nowrap;
}

.ht-cite-tab-btn:hover {
    color: var(--ht-primary);
    border-color: var(--ht-primary);
}

.ht-cite-tab-btn.ht-cite-tab-active {
    background: var(--ht-primary);
    color: #ffffff;
    border-color: var(--ht-primary);
}

.ht-citation-code-wrap {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    background: var(--ht-surface);
    border: 1px solid var(--ht-surface-border);
    border-radius: var(--ht-radius-sm);
    padding: 14px 16px;
}

@media (max-width: 640px) {
    .ht-citation-code-wrap {
        flex-direction: column;
    }
}

.ht-citation-code-content {
    flex: 1;
    font-family: var(--ht-font-en);
    font-size: 0.86rem;
    color: var(--ht-text-primary);
    line-height: 1.6;
    word-break: break-word;
    white-space: pre-wrap;
    user-select: all;
}

.ht-citation-actions {
    flex-shrink: 0;
}

.ht-btn-copy-citation {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: var(--ht-primary);
    color: #ffffff;
    border-radius: var(--ht-radius-sm);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--ht-transition);
    white-space: nowrap;
}

.ht-btn-copy-citation:hover {
    background: var(--ht-primary-hover);
    transform: translateY(-1px);
}

.ht-btn-copy-citation.ht-copied {
    background: #059669;
}

/* Community Card */
.ht-single-community-card {
    display: flex;
    align-items: center;
    gap: 18px;
    background: linear-gradient(135deg, var(--ht-surface-hover) 0%, var(--ht-primary-light) 100%);
    border: 1px solid var(--ht-primary-border);
    padding: 22px;
    border-radius: var(--ht-radius-md);
    margin: 32px 0;
}

.ht-community-icon-box {
    color: var(--ht-primary);
}

.ht-community-title {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.ht-community-desc {
    font-size: 0.88rem;
    color: var(--ht-text-muted);
}

.ht-community-links {
    display: flex;
    gap: 10px;
    margin-left: auto;
}

/* Tags List */
.ht-tags-list {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    margin: 28px 0;
}

.ht-tags-label {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--ht-text-muted);
}

.ht-tag-chip {
    padding: 4px 12px;
    background: var(--ht-surface-hover);
    border: 1px solid var(--ht-surface-border);
    border-radius: var(--ht-radius-full);
    font-size: 0.82rem;
    color: var(--ht-text-secondary);
}

.ht-tag-chip:hover {
    background: var(--ht-primary);
    color: #fff;
    border-color: var(--ht-primary);
}

/* Author Card completely removed as per specification */

/* Related Posts */
.ht-related-section {
    margin: 40px 0;
    padding-top: 24px;
    border-top: 2px solid var(--ht-surface-border);
}

.ht-related-heading {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.3rem;
    font-weight: 800;
    margin-bottom: 20px;
}

.ht-related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.ht-related-card {
    background: var(--ht-surface);
    border: 1px solid var(--ht-surface-border);
    border-radius: var(--ht-radius-md);
    overflow: hidden;
}

.ht-related-thumb-wrap {
    display: block;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.ht-related-thumb-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.ht-related-body {
    padding: 12px;
}

.ht-related-title {
    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.ht-related-date {
    font-size: 0.75rem;
    color: var(--ht-text-muted);
}

/* -------------------------------------------------------------
 * 14. Focus Reading Mode
 * ------------------------------------------------------------- */
body.ht-focus-mode .ht-sidebar-area,
body.ht-focus-mode .ht-topbar,
body.ht-focus-mode .ht-footer,
body.ht-focus-mode .ht-ad-wrapper,
body.ht-focus-mode .ht-single-community-card {
    display: none !important;
}

body.ht-focus-mode .ht-layout-row {
    grid-template-columns: 1fr;
    max-width: 820px;
    margin: 0 auto;
}

body.ht-focus-mode .ht-article-col {
    border: none;
    box-shadow: none;
    background: transparent;
    padding: 10px 0;
}

/* -------------------------------------------------------------
 * 15. Comments Styling
 * ------------------------------------------------------------- */
.ht-comments-area {
    margin-top: 48px;
    padding-top: 32px;
    border-top: 2px solid var(--ht-surface-border);
}

.ht-comments-header {
    margin-bottom: 24px;
}

.ht-comments-title-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.25rem;
    font-weight: 800;
}

.ht-comment-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 36px;
}

.comment {
    background: var(--ht-surface);
    border: 1px solid var(--ht-surface-border);
    padding: 18px;
    border-radius: var(--ht-radius-md);
}

.comment .children {
    list-style: none;
    margin-top: 16px;
    padding-left: 24px;
    border-left: 2px solid var(--ht-surface-border);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.comment-author {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.comment-author img {
    border-radius: var(--ht-radius-full);
}

.comment-metadata {
    font-size: 0.8rem;
    color: var(--ht-text-muted);
    margin-bottom: 10px;
}

.comment-body p {
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 10px;
}

.reply a {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--ht-primary);
}

.comment-respond {
    background: var(--ht-surface-hover);
    border: 1px solid var(--ht-surface-border);
    padding: 24px;
    border-radius: var(--ht-radius-md);
}

.comment-reply-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.comment-form p {
    margin-bottom: 14px;
}

.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form textarea {
    width: 100%;
    padding: 10px 14px;
    background: var(--ht-surface);
    border: 1px solid var(--ht-surface-border);
    border-radius: var(--ht-radius-sm);
    color: var(--ht-text-primary);
}

.comment-form textarea {
    min-height: 120px;
}

/* -------------------------------------------------------------
 * 16. Print Stylesheet with Watermark
 * ------------------------------------------------------------- */
.ht-print-watermark {
    display: none;
}

@media print {
    .ht-header, .ht-topbar, .ht-footer, .ht-sidebar-area,
    .ht-reading-toolbelt, .ht-toc-container, .ht-reading-progress,
    .ht-ad-wrapper, .ht-single-community-card, .ht-comments-area,
    .ht-scroll-top, .ht-mobile-dock, .ht-related-section {
        display: none !important;
    }

    body {
        background: #fff !important;
        color: #000 !important;
        font-size: 12pt !important;
    }

    .ht-article-col {
        border: none !important;
        box-shadow: none !important;
        padding: 0 !important;
    }

    .ht-print-watermark {
        display: block !important;
        text-align: center;
        padding-bottom: 16px;
        margin-bottom: 24px;
        border-bottom: 2px solid #000;
    }

    .ht-print-logo {
        font-size: 20pt;
        font-weight: 800;
    }

    .ht-print-subtitle {
        font-size: 9pt;
        color: #444;
    }
}

/* Responsive Single Article */
@media (max-width: 768px) {
    .ht-article-col {
        padding: 20px 16px;
    }
    .ht-article-title {
        font-size: 1.45rem;
        line-height: 1.35;
    }
    .ht-related-grid {
        grid-template-columns: 1fr;
    }
    .ht-single-community-card {
        flex-direction: column;
        text-align: center;
    }
    .ht-community-links {
        margin-left: 0;
        width: 100%;
        justify-content: center;
    }
    .ht-table-scroll-hint {
        display: flex;
    }
}

@media (max-width: 480px) {
    .ht-article-col {
        padding: 16px 12px;
        border-radius: var(--ht-radius-sm);
    }
    .ht-article-title {
        font-size: 1.32rem;
        line-height: 1.35;
        margin-bottom: 14px;
    }
    .ht-reading-toolbelt {
        gap: 6px;
        padding: 8px;
    }
    .ht-resizer-btn {
        padding: 2px 8px;
        font-size: 0.8rem;
    }
    .ht-toolbelt-btn {
        padding: 4px 8px;
        font-size: 0.78rem;
    }
    .ht-tool-label {
        font-size: 0.78rem;
    }
    .ht-meta-stats {
        gap: 8px;
        font-size: 0.75rem;
    }
}

/* Mobile Reading Toolbelt Horizontally Swipeable App-Style Chips */
@media (max-width: 600px) {
    .ht-reading-toolbelt {
        overflow-x: auto;
        flex-wrap: nowrap;
        gap: 8px;
        padding: 8px 12px;
        scrollbar-width: none;
        -webkit-overflow-scrolling: touch;
    }
    .ht-reading-toolbelt::-webkit-scrollbar {
        display: none;
    }
    .ht-toolbelt-group {
        flex-shrink: 0;
    }
    .ht-toolbelt-btn {
        white-space: nowrap;
        flex-shrink: 0;
    }
    .ht-tool-label {
        white-space: nowrap;
        flex-shrink: 0;
    }
}

/* =============================================================
   Single Post Dark Mode Contrast & Content Perfection
   ============================================================= */
[data-theme="dark"] .ht-article-col {
    background: #131b2e !important;
    border-color: #1e293b !important;
}

[data-theme="dark"] .ht-article-title {
    color: #f8fafc !important;
}

[data-theme="dark"] .ht-author-link {
    color: #f1f5f9 !important;
}

[data-theme="dark"] .ht-meta-stats,
[data-theme="dark"] .ht-author-by {
    color: #94a3b8 !important;
}

[data-theme="dark"] .ht-article-meta-row {
    border-color: #1e293b !important;
}

[data-theme="dark"] .ht-updated-badge {
    background: #111827 !important;
    border-color: #1e293b !important;
    color: #94a3b8 !important;
}

/* Toolbelt */
[data-theme="dark"] .ht-reading-toolbelt {
    background: #111827 !important;
    border-color: #1e293b !important;
}

[data-theme="dark"] .ht-tool-label {
    color: #94a3b8 !important;
}

[data-theme="dark"] .ht-resizer-btn,
[data-theme="dark"] .ht-toolbelt-btn {
    background: #1e293b !important;
    border-color: #334155 !important;
    color: #cbd5e1 !important;
}

[data-theme="dark"] .ht-resizer-btn:hover,
[data-theme="dark"] .ht-resizer-btn.ht-active,
[data-theme="dark"] .ht-toolbelt-btn:hover,
[data-theme="dark"] .ht-toolbelt-btn.ht-active {
    background: #2563eb !important;
    color: #ffffff !important;
    border-color: #2563eb !important;
}

/* Table of Contents (TOC) */
[data-theme="dark"] .ht-toc-container {
    background: #111827 !important;
    border-color: #1e293b !important;
    border-left-color: #3b82f6 !important;
}

[data-theme="dark"] .ht-toc-header {
    background: #1a2234 !important;
}

[data-theme="dark"] .ht-toc-title-wrap {
    color: #f8fafc !important;
}

[data-theme="dark"] .ht-toc-list a {
    color: #cbd5e1 !important;
}

[data-theme="dark"] .ht-toc-list a:hover,
[data-theme="dark"] .ht-toc-list a.ht-toc-active {
    color: #60a5fa !important;
}

/* Article Entry Content Typography in Dark Mode (WCAG 2.1 AA Compliant) */
[data-theme="dark"] .ht-entry-content {
    color: #e2e8f0 !important;
}

[data-theme="dark"] .ht-entry-content h1,
[data-theme="dark"] .ht-entry-content h2,
[data-theme="dark"] .ht-entry-content h3,
[data-theme="dark"] .ht-entry-content h4,
[data-theme="dark"] .ht-entry-content h5,
[data-theme="dark"] .ht-entry-content h6,
[data-theme="dark"] .ht-entry-content h1 *,
[data-theme="dark"] .ht-entry-content h2 *,
[data-theme="dark"] .ht-entry-content h3 *,
[data-theme="dark"] .ht-entry-content h4 *,
[data-theme="dark"] .ht-entry-content h5 *,
[data-theme="dark"] .ht-entry-content h6 * {
    color: #f8fafc !important;
}

[data-theme="dark"] .ht-entry-content h2 {
    border-bottom-color: rgba(255, 255, 255, 0.1) !important;
}

[data-theme="dark"] .ht-entry-content p,
[data-theme="dark"] .ht-entry-content li {
    color: #cbd5e1 !important;
}

[data-theme="dark"] .ht-entry-content figcaption,
[data-theme="dark"] .ht-entry-content figcaption * {
    color: #94a3b8 !important;
}

[data-theme="dark"] .ht-entry-content strong,
[data-theme="dark"] .ht-entry-content b {
    color: #ffffff !important;
}

[data-theme="dark"] .ht-entry-content a {
    color: #60a5fa !important;
    text-decoration-color: rgba(96, 165, 250, 0.45) !important;
}

[data-theme="dark"] .ht-entry-content a:hover {
    color: #93c5fd !important;
    text-decoration-color: #60a5fa !important;
    background-color: rgba(37, 99, 235, 0.22) !important;
}

/* Callout Boxes, Quick Summaries (সারসংক্ষেপ) & Blockquotes in Dark Mode */
[data-theme="dark"] .ht-entry-content blockquote,
[data-theme="dark"] .ht-entry-content .ht-migrated-callout,
[data-theme="dark"] .ht-entry-content div[style*="background"] {
    background: rgba(30, 41, 59, 0.75) !important;
    border-color: rgba(255, 255, 255, 0.1) !important;
    color: #cbd5e1 !important;
    box-shadow: none !important;
}

[data-theme="dark"] .ht-entry-content div[style*="background"] strong,
[data-theme="dark"] .ht-entry-content div[style*="background"] b,
[data-theme="dark"] .ht-entry-content div[style*="background"] h3,
[data-theme="dark"] .ht-entry-content div[style*="background"] h4 {
    color: #f8fafc !important;
}

/* Question bank / Creative Questions (সৃজনশীল ও বহুনির্বাচনী প্রশ্ন) in Dark Mode */
[data-theme="dark"] .ht-entry-content h3 span[style*="color: rgb(20"],
[data-theme="dark"] .ht-entry-content h3 span[style*="color: rgb(21"],
[data-theme="dark"] .ht-entry-content h3 span[style*="color: #14532d"],
[data-theme="dark"] .ht-entry-content h3 span[style*="color: #15803d"] {
    color: #4ade80 !important;
}

[data-theme="dark"] .ht-entry-content h3 span[style*="color: #0369a1"],
[data-theme="dark"] .ht-entry-content h3 span[style*="color: #1a73e8"],
[data-theme="dark"] .ht-entry-content h3 span[style*="color: #0c2340"] {
    color: #38bdf8 !important;
}

/* Universal Inline Contrast Fallback */
[data-theme="dark"] .ht-entry-content span[style*="color: #1"],
[data-theme="dark"] .ht-entry-content span[style*="color: #2"],
[data-theme="dark"] .ht-entry-content span[style*="color: #3"],
[data-theme="dark"] .ht-entry-content span[style*="color: #0"],
[data-theme="dark"] .ht-entry-content p[style*="color: #1"],
[data-theme="dark"] .ht-entry-content p[style*="color: #2"],
[data-theme="dark"] .ht-entry-content p[style*="color: #3"],
[data-theme="dark"] .ht-entry-content p[style*="color: #0"] {
    color: #cbd5e1 !important;
}

[data-theme="dark"] .ht-entry-content code,
[data-theme="dark"] .ht-entry-content kbd {
    background: #090d16 !important;
    color: #38bdf8 !important;
    border: 1px solid #1e293b !important;
}

/* Responsive Tables */
[data-theme="dark"] .ht-table-responsive,
[data-theme="dark"] .ht-table-wrapper {
    background: #111827 !important;
    border-color: #1e293b !important;
}

[data-theme="dark"] .ht-table-scroll-hint {
    background: rgba(37, 99, 235, 0.15) !important;
    border-color: rgba(59, 130, 246, 0.3) !important;
    color: #60a5fa !important;
}

[data-theme="dark"] .ht-entry-content table {
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
    background: rgba(15, 23, 42, 0.6) !important;
}

[data-theme="dark"] .ht-entry-content th {
    background: rgba(30, 41, 59, 0.95) !important;
    color: #f8fafc !important;
    border: 1px solid rgba(255, 255, 255, 0.12) !important;
}

[data-theme="dark"] .ht-entry-content td {
    color: #cbd5e1 !important;
    border: 1px solid rgba(255, 255, 255, 0.08) !important;
}

[data-theme="dark"] .ht-entry-content td * {
    color: inherit !important;
}

[data-theme="dark"] .ht-entry-content tr:nth-child(even) td {
    background: rgba(255, 255, 255, 0.03) !important;
}

/* Alert Boxes */
[data-theme="dark"] .ht-alert-info {
    background: rgba(2, 132, 199, 0.15) !important;
    border-color: rgba(56, 189, 248, 0.35) !important;
    color: #38bdf8 !important;
}

[data-theme="dark"] .ht-alert-warning {
    background: rgba(245, 158, 11, 0.15) !important;
    border-color: rgba(251, 191, 36, 0.35) !important;
    color: #fbbf24 !important;
}

[data-theme="dark"] .ht-alert-routine {
    background: rgba(59, 130, 246, 0.15) !important;
    border-color: rgba(96, 165, 250, 0.35) !important;
    color: #60a5fa !important;
}

/* MCQ Interactive Engine */
[data-theme="dark"] .ht-mcq-card {
    background: #111827 !important;
    border-color: #1e293b !important;
}

[data-theme="dark"] .ht-mcq-question {
    color: #f8fafc !important;
}

[data-theme="dark"] .ht-mcq-option {
    background: #1e293b !important;
    border-color: #334155 !important;
    color: #cbd5e1 !important;
}

[data-theme="dark"] .ht-mcq-reveal-btn {
    background: #1e293b !important;
    border-color: #334155 !important;
    color: #94a3b8 !important;
}

[data-theme="dark"] .ht-mcq-answer {
    background: rgba(16, 185, 129, 0.15) !important;
    border-color: rgba(52, 211, 153, 0.35) !important;
    color: #34d399 !important;
}

/* Checklist */
[data-theme="dark"] .ht-checklist-box {
    background: #111827 !important;
    border-color: #1e293b !important;
    color: #cbd5e1 !important;
}

[data-theme="dark"] .ht-checklist-title {
    color: #f8fafc !important;
}

/* Download Box */
[data-theme="dark"] .ht-download-box {
    background: #111827 !important;
    border-color: #1e293b !important;
}

/* Academic Citation Card */
[data-theme="dark"] .ht-citation-card {
    background: #111827 !important;
    border-color: #1e293b !important;
}

[data-theme="dark"] .ht-citation-header {
    color: #f8fafc !important;
}

[data-theme="dark"] .ht-citation-text {
    color: #94a3b8 !important;
}

[data-theme="dark"] .ht-citation-apa-box {
    background: #090d16 !important;
    border-color: #1e293b !important;
}

[data-theme="dark"] .ht-apa-code {
    color: #cbd5e1 !important;
}

/* Community Study Group Card */
[data-theme="dark"] .ht-single-community-card {
    background: linear-gradient(135deg, #111827 0%, rgba(37, 99, 235, 0.15) 100%) !important;
    border-color: rgba(59, 130, 246, 0.35) !important;
}

[data-theme="dark"] .ht-community-title {
    color: #f8fafc !important;
}

[data-theme="dark"] .ht-community-desc {
    color: #94a3b8 !important;
}

/* Tags List */
[data-theme="dark"] .ht-tag-chip {
    background: #1e293b !important;
    border-color: #334155 !important;
    color: #cbd5e1 !important;
}

/* Breadcrumbs */
[data-theme="dark"] .ht-breadcrumbs a {
    color: #94a3b8 !important;
}

[data-theme="dark"] .ht-crumb-current {
    color: #cbd5e1 !important;
}

/* Related Posts */
[data-theme="dark"] .ht-related-card {
    background: #111827 !important;
    border-color: #1e293b !important;
}

[data-theme="dark"] .ht-related-title a {
    color: #f8fafc !important;
}

[data-theme="dark"] .ht-related-title a:hover {
    color: #60a5fa !important;
}

[data-theme="dark"] .ht-related-meta {
    color: #94a3b8 !important;
}

/* -------------------------------------------------------------
 * 16. Social Share Bars (Top & Bottom)
 * ------------------------------------------------------------- */
.ht-share-top {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 14px 0 20px 0;
    padding: 10px 16px;
    background: var(--ht-surface);
    border: 1px solid var(--ht-surface-border);
    border-radius: var(--ht-radius-full);
}

.ht-share-top .ht-share-label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--ht-text-muted);
}

.ht-share-pills {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.ht-share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--ht-radius-full);
    background: var(--ht-surface-hover);
    color: var(--ht-text-secondary);
    border: 1px solid var(--ht-surface-border);
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.2s ease, color 0.2s ease;
}

.ht-share-btn:hover {
    transform: translateY(-2px) scale(1.08);
}

.ht-share-fb:hover { background: #1877f2 !important; color: #fff !important; border-color: #1877f2 !important; }
.ht-share-wa:hover { background: #25d366 !important; color: #fff !important; border-color: #25d366 !important; }
.ht-share-tg:hover { background: #229ed9 !important; color: #fff !important; border-color: #229ed9 !important; }
.ht-share-tw:hover { background: #0f1419 !important; color: #fff !important; border-color: #0f1419 !important; }
.ht-share-li:hover { background: #0a66c2 !important; color: #fff !important; border-color: #0a66c2 !important; }
.ht-share-copy:hover { background: var(--ht-primary) !important; color: #fff !important; border-color: var(--ht-primary) !important; }

/* Bottom Large Share Card */
.ht-share-bottom {
    margin: 36px 0 24px 0;
    padding: 24px 28px;
    background: var(--ht-surface);
    border: 1px solid var(--ht-surface-border);
    border-radius: 16px;
    box-shadow: 0 2px 10px rgba(15, 23, 42, 0.03);
}

.ht-share-card-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 20px;
}

.ht-share-card-header .ht-share-icon-wrap {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--ht-primary-light);
    color: var(--ht-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.ht-share-card-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--ht-text-primary);
    margin-bottom: 4px;
}

.ht-share-card-sub {
    font-size: 0.88rem;
    color: var(--ht-text-muted);
    margin: 0;
}

.ht-share-card-btns {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.ht-share-large-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    font-size: 0.88rem;
    font-weight: 600;
    border-radius: var(--ht-radius-full);
    border: 1px solid var(--ht-surface-border);
    background: var(--ht-surface-hover);
    color: var(--ht-text-primary);
    cursor: pointer;
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.ht-share-large-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
}

/* -------------------------------------------------------------
 * 17. Interactive Student Helpful Reaction Box
 * ------------------------------------------------------------- */
.ht-reaction-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 20px 24px;
    margin: 24px 0 32px 0;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.04) 0%, rgba(16, 185, 129, 0.04) 100%);
    border: 1px solid rgba(37, 99, 235, 0.15);
    border-radius: 16px;
}

.ht-reaction-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.ht-reaction-question {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--ht-text-primary);
}

.ht-reaction-sub {
    font-size: 0.85rem;
    color: var(--ht-text-muted);
}

.ht-reaction-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--ht-primary);
    background: var(--ht-surface);
    border: 2px solid var(--ht-primary);
    border-radius: var(--ht-radius-full);
    cursor: pointer;
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
    flex-shrink: 0;
}

.ht-reaction-btn:hover {
    transform: scale(1.04);
    background: var(--ht-primary-light);
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.2);
}

.ht-reaction-btn.ht-liked {
    background: var(--ht-primary);
    color: #fff;
    border-color: var(--ht-primary);
}

.ht-reaction-btn.ht-animating {
    animation: htPopReaction 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes htPopReaction {
    0% { transform: scale(1); }
    50% { transform: scale(1.18); }
    100% { transform: scale(1); }
}

.ht-reaction-count {
    background: rgba(37, 99, 235, 0.1);
    color: var(--ht-primary);
    padding: 2px 8px;
    border-radius: var(--ht-radius-full);
    font-size: 0.85rem;
    font-weight: 800;
}

.ht-reaction-btn.ht-liked .ht-reaction-count {
    background: rgba(255, 255, 255, 0.25);
    color: #fff;
}

/* -------------------------------------------------------------
 * 18. Google E-E-A-T Compliant Rich Author Bio Card
 * ------------------------------------------------------------- */
.ht-author-bio-card {
    display: flex;
    gap: 24px;
    padding: 28px;
    margin: 36px 0;
    background: var(--ht-surface);
    border: 1px solid var(--ht-surface-border);
    border-radius: 18px;
    box-shadow: 0 2px 14px rgba(15, 23, 42, 0.04);
}

.ht-author-avatar-col {
    flex-shrink: 0;
}

.ht-author-bio-avatar {
    width: 86px;
    height: 86px;
    border-radius: var(--ht-radius-full);
    display: block;
    border: 3px solid var(--ht-primary-light);
    box-shadow: 0 0 0 1px var(--ht-primary-border);
    object-fit: cover;
}

.ht-author-details-col {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.ht-author-header-line {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}

.ht-author-pretitle {
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--ht-primary);
    display: block;
    margin-bottom: 2px;
}

.ht-author-name {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--ht-text-primary);
    margin: 0;
}

.ht-author-name a:hover {
    color: var(--ht-primary);
}

.ht-author-eeat-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    font-size: 0.8rem;
    font-weight: 700;
    border-radius: var(--ht-radius-full);
    background: #ecfdf5;
    color: #059669;
    border: 1px solid #a7f3d0;
}

.ht-author-bio-text {
    font-size: 0.95rem;
    line-height: 1.75;
    color: var(--ht-text-secondary);
    margin-bottom: 16px;
}

.ht-author-footer-line {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding-top: 14px;
    border-top: 1px dashed var(--ht-surface-border);
    flex-wrap: wrap;
}

.ht-author-stats {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--ht-text-muted);
}

.ht-author-all-posts-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--ht-primary);
    transition: transform 0.2s ease, color 0.2s ease;
}

.ht-author-all-posts-link:hover {
    transform: translateX(3px);
    color: var(--ht-primary-hover);
}

/* -------------------------------------------------------------
 * 19. Previous / Next Article Navigation Cards
 * ------------------------------------------------------------- */
.ht-post-nav-cards {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
    margin: 32px 0 36px 0;
}

.ht-nav-card {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 18px 22px;
    background: var(--ht-surface);
    border: 1px solid var(--ht-surface-border);
    border-radius: 14px;
    text-decoration: none;
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease, border-color 0.2s ease;
}

.ht-nav-card:hover {
    transform: translateY(-3px);
    border-color: var(--ht-primary-border);
    box-shadow: 0 6px 18px rgba(15, 23, 42, 0.06);
}

.ht-nav-card-arrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--ht-primary);
}

.ht-nav-card-next .ht-nav-card-arrow {
    justify-content: flex-end;
}

.ht-nav-card-next {
    text-align: right;
}

.ht-nav-card-title {
    font-size: 1.05rem;
    font-weight: 700;
    line-height: 1.45;
    color: var(--ht-text-primary);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color 0.2s ease;
}

.ht-nav-card:hover .ht-nav-card-title {
    color: var(--ht-primary);
}

.ht-nav-card-empty {
    visibility: hidden;
}

/* Responsive Stacking */
@media (max-width: 680px) {
    .ht-author-bio-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 22px 18px;
    }

    .ht-author-header-line {
        justify-content: center;
    }

    .ht-author-footer-line {
        justify-content: center;
    }

    .ht-reaction-card {
        flex-direction: column;
        text-align: center;
        padding: 18px 16px;
    }

    .ht-post-nav-cards {
        grid-template-columns: 1fr;
    }

    .ht-nav-card-next {
        text-align: left;
    }

    .ht-nav-card-next .ht-nav-card-arrow {
        justify-content: flex-start;
    }
}

/* -------------------------------------------------------------
 * 20. Dark Mode Support for New Components
 * ------------------------------------------------------------- */
[data-theme="dark"] .ht-share-top,
[data-theme="dark"] .ht-share-bottom,
[data-theme="dark"] .ht-author-bio-card,
[data-theme="dark"] .ht-nav-card {
    background: #111827 !important;
    border-color: #1e293b !important;
}

[data-theme="dark"] .ht-share-btn,
[data-theme="dark"] .ht-share-large-btn {
    background: #1f2937 !important;
    border-color: #374151 !important;
    color: #e5e7eb !important;
}

[data-theme="dark"] .ht-reaction-card {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.12) 0%, rgba(16, 185, 129, 0.1) 100%) !important;
    border-color: rgba(59, 130, 246, 0.3) !important;
}

[data-theme="dark"] .ht-reaction-btn {
    background: #111827 !important;
    color: #60a5fa !important;
    border-color: #3b82f6 !important;
}

[data-theme="dark"] .ht-reaction-btn.ht-liked {
    background: #2563eb !important;
    color: #fff !important;
}

[data-theme="dark"] .ht-author-bio-avatar {
    border-color: rgba(59, 130, 246, 0.3) !important;
}

[data-theme="dark"] .ht-author-eeat-pill {
    background: rgba(16, 185, 129, 0.18) !important;
    color: #34d399 !important;
    border-color: rgba(16, 185, 129, 0.3) !important;
}

[data-theme="dark"] .ht-author-bio-text {
    color: #cbd5e1 !important;
}

[data-theme="dark"] .ht-author-name a,
[data-theme="dark"] .ht-share-card-title,
[data-theme="dark"] .ht-reaction-question,
[data-theme="dark"] .ht-nav-card-title {
    color: #f8fafc !important;
}

[data-theme="dark"] .ht-author-footer-line {
    border-top-color: #1e293b !important;
}