/* ===========================================
   ICSD Tutorials — Archive & Single Styles
   =========================================== */

/* ===== Archive Grid ===== */
.icsd-tutorials-archive .icsd-portfolio-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 32px;
    justify-content: center;
}

.icsd-tutorial-filter-btn {
    background: var(--icsd-bg-alt);
    border: 1px solid var(--icsd-border);
    color: var(--icsd-text-2);
    padding: 8px 18px;
    border-radius: 999px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}
.icsd-tutorial-filter-btn small {
    opacity: 0.6;
    margin-right: 4px;
}
.icsd-tutorial-filter-btn:hover {
    background: var(--icsd-primary-soft);
    color: var(--icsd-primary);
    border-color: var(--icsd-primary-border);
}
.icsd-tutorial-filter-btn.active {
    background: var(--icsd-primary);
    color: var(--icsd-text-on-primary);
    border-color: var(--icsd-primary);
}

.icsd-tutorials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.icsd-tutorial-card {
    background: var(--icsd-surface);
    border: 1px solid var(--icsd-border);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}
.icsd-tutorial-card::before {
    content: "";
    position: absolute;
    top: 0; right: 0; left: 0;
    height: 4px;
    background: var(--tut-color, var(--icsd-primary));
    opacity: 0;
    transition: opacity 0.3s ease;
}
.icsd-tutorial-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--icsd-shadow-lg);
    border-color: var(--tut-color, var(--icsd-primary));
}
.icsd-tutorial-card:hover::before {
    opacity: 1;
}

.icsd-tutorial-card-link {
    display: block;
    color: inherit;
    text-decoration: none;
}
.icsd-tutorial-card-link:hover {
    color: inherit;
    text-decoration: none;
}

.icsd-tutorial-card-header {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--icsd-bg-alt);
}
.icsd-tutorial-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease, filter 0.5s ease;
    filter: grayscale(100%);
}
.icsd-tutorial-card:hover .icsd-tutorial-thumb {
    transform: scale(1.05);
    filter: grayscale(0%);
}
.icsd-tutorial-thumb--placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg,
        rgba(var(--icsd-primary-rgb), 0.05) 0%,
        rgba(var(--icsd-primary-rgb), 0.15) 100%);
}
.icsd-tutorial-icon-big {
    font-size: 64px;
    line-height: 1;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.1));
}

.icsd-tutorial-level {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--icsd-bg);
    color: var(--icsd-text);
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
    backdrop-filter: blur(10px);
    border: 1px solid var(--icsd-border);
}

.icsd-tutorial-card-body {
    padding: 20px;
}

.icsd-tutorial-cat {
    display: inline-block;
    color: var(--tut-color, var(--icsd-primary));
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.icsd-tutorial-title {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 0 10px;
    font-size: 18px;
    font-weight: 700;
    color: var(--icsd-text);
    line-height: 1.4;
}
.icsd-tutorial-title .ic {
    font-size: 22px;
    line-height: 1;
}

.icsd-tutorial-excerpt {
    color: var(--icsd-text-muted);
    font-size: 14px;
    line-height: 1.6;
    margin: 0 0 16px;
}

.icsd-tutorial-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    padding-top: 14px;
    margin-bottom: 14px;
    border-top: 1px solid var(--icsd-border);
}
.icsd-tutorial-meta .meta-item {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
    color: var(--icsd-text-muted);
}
.icsd-tutorial-meta .meta-item svg {
    color: var(--tut-color, var(--icsd-primary));
}

.icsd-tutorial-cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--tut-color, var(--icsd-primary));
    font-weight: 600;
    font-size: 14px;
    transition: gap 0.2s ease;
}
.icsd-tutorial-card:hover .icsd-tutorial-cta {
    gap: 10px;
}

/* ===== Single Tutorial - Hero ===== */
.icsd-tutorial-hero {
    position: relative;
    padding: 60px 0 50px;
    background:
        radial-gradient(circle at 80% 20%, rgba(var(--icsd-primary-rgb), 0.08) 0%, transparent 50%),
        radial-gradient(circle at 20% 80%, rgba(var(--icsd-primary-rgb), 0.05) 0%, transparent 50%),
        var(--icsd-bg);
    border-bottom: 1px solid var(--icsd-border);
    overflow: hidden;
}
.icsd-tutorial-hero::before {
    content: "";
    position: absolute;
    top: 0; right: 0;
    width: 6px;
    height: 100%;
    background: linear-gradient(180deg, var(--tut-color, var(--icsd-primary)), transparent);
}

.icsd-tutorial-hero-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 48px;
    align-items: center;
}

.icsd-tutorial-hero-title {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 800;
    line-height: 1.2;
    margin: 12px 0 20px;
    color: var(--icsd-text);
}
.icsd-tutorial-hero-title .ic {
    font-size: 1.2em;
    line-height: 1;
}

.icsd-tutorial-hero-excerpt {
    font-size: 17px;
    line-height: 1.7;
    color: var(--icsd-text-muted);
    margin-bottom: 28px;
    max-width: 620px;
}

.icsd-tutorial-hero-meta {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}
.icsd-tutorial-hero-meta .meta-block {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--icsd-surface);
    border: 1px solid var(--icsd-border);
    border-radius: 12px;
}
.icsd-tutorial-hero-meta .meta-icon {
    font-size: 24px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(var(--icsd-primary-rgb), 0.1);
    border-radius: 10px;
    flex-shrink: 0;
}
.icsd-tutorial-hero-meta .meta-label {
    display: block;
    font-size: 11px;
    color: var(--icsd-text-muted);
    margin-bottom: 2px;
}
.icsd-tutorial-hero-meta .meta-value {
    display: block;
    font-size: 14px;
    font-weight: 700;
    color: var(--icsd-text);
}

.icsd-tutorial-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.icsd-tutorial-hero-cover {
    position: relative;
    aspect-ratio: 4 / 3;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--icsd-shadow-lg);
    border: 1px solid var(--icsd-border);
}
.icsd-tutorial-hero-cover .cover-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.icsd-tutorial-hero-cover--icon {
    background: linear-gradient(135deg,
        rgba(var(--icsd-primary-rgb), 0.1) 0%,
        rgba(var(--icsd-primary-rgb), 0.25) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}
.icsd-tutorial-hero-cover .huge-icon {
    font-size: clamp(80px, 15vw, 160px);
    line-height: 1;
    filter: drop-shadow(0 12px 30px rgba(0, 0, 0, 0.15));
}

/* ===== Single Tutorial - Content ===== */
.icsd-tutorial-single {
    padding: 50px 0 80px;
}
.icsd-tutorial-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 40px;
    align-items: start;
}

.icsd-prereq-box {
    display: flex;
    gap: 16px;
    padding: 18px;
    background: rgba(var(--icsd-primary-rgb), 0.05);
    border: 1px solid var(--icsd-primary-border);
    border-radius: 14px;
    margin-bottom: 30px;
}
.icsd-prereq-box .prereq-icon {
    font-size: 28px;
    flex-shrink: 0;
}
.icsd-prereq-box h4 {
    margin: 0 0 6px;
    font-size: 16px;
    color: var(--icsd-text);
}
.icsd-prereq-box p {
    margin: 0;
    color: var(--icsd-text-2);
    font-size: 14px;
    line-height: 1.7;
}

.icsd-tutorial-description {
    margin-bottom: 40px;
    color: var(--icsd-text-2);
    line-height: 1.8;
    font-size: 16px;
}
.icsd-tutorial-description h2,
.icsd-tutorial-description h3 {
    color: var(--icsd-text);
    margin-top: 32px;
}

.icsd-chapters-section {
    margin-top: 40px;
}
.icsd-chapters-section .icsd-section-title {
    margin-bottom: 24px;
    font-size: 28px;
    font-weight: 800;
}

.icsd-chapters-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.icsd-chapter-item-card {
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 18px 22px;
    background: var(--icsd-surface);
    border: 1px solid var(--icsd-border);
    border-radius: 12px;
    color: inherit;
    text-decoration: none;
    transition: all 0.25s ease;
    position: relative;
}
.icsd-chapter-item-card:hover {
    border-color: var(--tut-color, var(--icsd-primary));
    transform: translateX(-4px);
    box-shadow: var(--icsd-shadow);
    text-decoration: none;
    color: inherit;
}
.icsd-chapter-item-card .chapter-num {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: rgba(var(--icsd-primary-rgb), 0.1);
    color: var(--tut-color, var(--icsd-primary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 14px;
    font-family: 'Courier New', monospace;
    transition: all 0.25s ease;
}
.icsd-chapter-item-card:hover .chapter-num {
    background: var(--tut-color, var(--icsd-primary));
    color: var(--icsd-text-on-primary);
}
.icsd-chapter-item-card .chapter-info {
    flex: 1;
    min-width: 0;
}
.icsd-chapter-item-card .chapter-title {
    margin: 0 0 4px;
    font-size: 16px;
    font-weight: 600;
    color: var(--icsd-text);
}
.icsd-chapter-item-card .chapter-desc {
    margin: 0;
    font-size: 13px;
    color: var(--icsd-text-muted);
    line-height: 1.5;
}
.icsd-chapter-item-card .chapter-arrow {
    color: var(--icsd-text-muted);
    transition: all 0.25s ease;
    flex-shrink: 0;
}
.icsd-chapter-item-card:hover .chapter-arrow {
    color: var(--tut-color, var(--icsd-primary));
    transform: translateX(-4px);
}

/* ===== Sidebar ===== */
.icsd-tutorial-sidebar {
    position: sticky;
    top: 100px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.icsd-sidebar-card {
    background: var(--icsd-surface);
    border: 1px solid var(--icsd-border);
    border-radius: 14px;
    padding: 22px;
}
.icsd-sidebar-card h4 {
    margin: 0 0 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--icsd-border);
    font-size: 16px;
    font-weight: 700;
    color: var(--icsd-text);
}

.icsd-info-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.icsd-info-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px dashed var(--icsd-border);
    font-size: 14px;
}
.icsd-info-list li:last-child {
    border-bottom: none;
}
.icsd-info-list li span {
    color: var(--icsd-text-muted);
}
.icsd-info-list li strong {
    color: var(--icsd-text);
    font-weight: 700;
}

.icsd-related-tutorials {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.icsd-related-tutorials .related-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    background: var(--icsd-bg-alt);
    border-radius: 10px;
    color: var(--icsd-text);
    text-decoration: none;
    font-size: 13px;
    transition: all 0.2s ease;
}
.icsd-related-tutorials .related-item:hover {
    background: rgba(var(--icsd-primary-rgb), 0.1);
    color: var(--icsd-primary);
    text-decoration: none;
    transform: translateX(-3px);
}
.icsd-related-tutorials .related-icon {
    font-size: 18px;
    flex-shrink: 0;
}
.icsd-related-tutorials .related-title {
    font-weight: 500;
}

/* ===== Tutorial Page Bar (for HTML chapter pages) ===== */
.icsd-tutorial-bar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--icsd-bg);
    border-bottom: 1px solid var(--icsd-border);
    padding: 12px 0;
}
.icsd-tutorial-bar .bar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}
.icsd-tutorial-bar .bar-back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--icsd-text);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    padding: 6px 12px;
    border-radius: 8px;
    transition: all 0.2s ease;
}
.icsd-tutorial-bar .bar-back:hover {
    background: rgba(var(--icsd-primary-rgb), 0.1);
    color: var(--icsd-primary);
    text-decoration: none;
}
.icsd-tutorial-bar .bar-title {
    font-size: 14px;
    color: var(--icsd-text-muted);
    flex: 1;
    text-align: center;
}
.icsd-tutorial-bar .bar-title strong {
    color: var(--icsd-text);
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
    .icsd-tutorial-hero-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .icsd-tutorial-hero-cover {
        max-width: 400px;
        margin: 0 auto;
    }
    .icsd-tutorial-layout {
        grid-template-columns: 1fr;
    }
    .icsd-tutorial-sidebar {
        position: static;
    }
}

@media (max-width: 600px) {
    .icsd-tutorials-grid {
        grid-template-columns: 1fr;
    }
    .icsd-tutorial-hero {
        padding: 40px 0 30px;
    }
    .icsd-chapter-item-card {
        padding: 14px 16px;
        gap: 12px;
    }
    .icsd-chapter-item-card .chapter-num {
        width: 36px;
        height: 36px;
    }
}

/* ============================================
   LESSON PAGE - صفحه تک فصل
   ============================================ */

.icsd-lesson-page {
    padding: 0 0 80px;
    position: relative;
    z-index: 2;
    --tut-color: var(--icsd-primary);
}

/* Progress Bar - sticky */
.icsd-lesson-progress-bar {
    position: sticky;
    top: 0;
    z-index: 50;
    height: 3px;
    background: var(--icsd-border);
    overflow: hidden;
}
.icsd-lesson-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--tut-color), var(--icsd-primary-light));
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Breadcrumb */
.icsd-lesson-breadcrumb {
    padding: 24px 0 16px;
    color: var(--icsd-text-muted);
    font-size: 13px;
    font-family: 'JetBrains Mono', 'Vazirmatn', monospace;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
}
.icsd-lesson-breadcrumb a {
    color: var(--icsd-text-muted);
    text-decoration: none;
    transition: color 0.2s;
}
.icsd-lesson-breadcrumb a:hover {
    color: var(--tut-color);
}
.icsd-lesson-breadcrumb .sep {
    color: var(--icsd-border);
}
.icsd-lesson-breadcrumb .current {
    color: var(--icsd-text);
    font-weight: 500;
}

/* Grid Layout */
.icsd-lesson-grid {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 32px;
    align-items: start;
}

/* ===== Sidebar ===== */
.icsd-lesson-sidebar {
    position: sticky;
    top: 100px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    padding-bottom: 20px;
}
.icsd-lesson-sidebar::-webkit-scrollbar {
    width: 6px;
}
.icsd-lesson-sidebar::-webkit-scrollbar-thumb {
    background: var(--icsd-border);
    border-radius: 3px;
}

.icsd-lesson-tutorial-card {
    background: var(--icsd-surface);
    border: 1px solid var(--icsd-border);
    border-right: 3px solid var(--tut-color);
    border-radius: 12px;
    padding: 14px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}
.icsd-lesson-tutorial-card .tutorial-icon {
    font-size: 28px;
    line-height: 1;
    flex-shrink: 0;
}
.icsd-lesson-tutorial-card a {
    text-decoration: none;
    color: inherit;
}
.icsd-lesson-tutorial-card h3 {
    margin: 0 0 4px;
    font-size: 14px;
    font-weight: 700;
    color: var(--icsd-text);
    transition: color 0.2s;
    line-height: 1.4;
}
.icsd-lesson-tutorial-card a:hover h3 {
    color: var(--tut-color);
}
.icsd-lesson-tutorial-card .lesson-count {
    font-family: 'JetBrains Mono', 'Vazirmatn', monospace;
    font-size: 11px;
    color: var(--icsd-text-muted);
}

/* TOC */
.icsd-lesson-toc {
    background: var(--icsd-surface);
    border: 1px solid var(--icsd-border);
    border-radius: 12px;
    padding: 16px;
}
.icsd-lesson-toc-title {
    margin: 0 0 12px;
    font-size: 13px;
    color: var(--tut-color);
    font-family: 'JetBrains Mono', 'Vazirmatn', monospace;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--icsd-border);
}
.icsd-lesson-toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
    counter-reset: toc-counter;
}
.icsd-toc-item {
    margin-bottom: 4px;
}
.icsd-toc-item a {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 9px 10px;
    border-radius: 8px;
    text-decoration: none;
    color: var(--icsd-text-2);
    font-size: 13px;
    transition: all 0.2s;
    line-height: 1.5;
}
.icsd-toc-item a:hover {
    background: var(--icsd-surface-2);
    color: var(--tut-color);
}
.icsd-toc-item .num {
    font-family: 'JetBrains Mono', 'Vazirmatn', monospace;
    font-size: 11px;
    color: var(--icsd-text-muted);
    background: var(--icsd-bg-alt);
    padding: 2px 6px;
    border-radius: 5px;
    flex-shrink: 0;
    min-width: 26px;
    text-align: center;
}
.icsd-toc-item .text {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.icsd-toc-item .title {
    line-height: 1.4;
}
.icsd-toc-item .dur {
    font-family: 'JetBrains Mono', 'Vazirmatn', monospace;
    font-size: 10px;
    color: var(--icsd-text-muted);
}
.icsd-toc-item .indicator {
    flex-shrink: 0;
    color: var(--tut-color);
    font-size: 12px;
    margin-top: 4px;
}
.icsd-toc-item.is-current a {
    background: rgba(var(--tut-color-rgb), 0.1);
    color: var(--tut-color);
    font-weight: 600;
    border: 1px solid rgba(var(--tut-color-rgb), 0.3);
}
.icsd-toc-item.is-current .num {
    background: var(--tut-color);
    color: var(--icsd-text-on-primary);
}
.icsd-toc-item.is-passed a {
    color: var(--icsd-text-muted);
}
.icsd-toc-item.is-passed .num {
    background: rgba(var(--tut-color-rgb), 0.15);
    color: var(--tut-color);
}

/* Progress Card */
.icsd-lesson-progress-card {
    background: var(--icsd-surface);
    border: 1px solid var(--icsd-border);
    border-radius: 12px;
    padding: 14px 16px;
}
.icsd-lesson-progress-card .progress-text {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    font-size: 12px;
    color: var(--icsd-text-muted);
}
.icsd-lesson-progress-card .progress-text strong {
    color: var(--tut-color);
    font-family: 'JetBrains Mono', 'Vazirmatn', monospace;
}
.icsd-lesson-progress-card .progress-bar {
    height: 6px;
    background: var(--icsd-border);
    border-radius: 100px;
    overflow: hidden;
}
.icsd-lesson-progress-card .progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--tut-color), var(--icsd-primary-light));
    border-radius: 100px;
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Main Content ===== */
.icsd-lesson-content {
    background: var(--icsd-surface);
    border: 1px solid var(--icsd-border);
    border-radius: 16px;
    padding: 36px 40px;
    min-width: 0;
}

.icsd-lesson-header {
    margin-bottom: 28px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--icsd-border);
}
.icsd-lesson-meta-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
    flex-wrap: wrap;
    gap: 10px;
}
.icsd-lesson-meta-top .icsd-section-tag {
    color: var(--tut-color);
}
.icsd-lesson-duration {
    font-family: 'JetBrains Mono', 'Vazirmatn', monospace;
    font-size: 12px;
    color: var(--icsd-text-muted);
    background: var(--icsd-surface-2);
    padding: 4px 10px;
    border-radius: 100px;
    border: 1px solid var(--icsd-border);
}
.icsd-lesson-title {
    font-family: 'Vazirmatn', sans-serif;
    font-size: 32px;
    font-weight: 800;
    margin: 0 0 12px;
    color: var(--icsd-text);
    line-height: 1.3;
}
.icsd-lesson-excerpt {
    color: var(--icsd-text-muted);
    font-size: 15px;
    line-height: 1.8;
    margin: 0;
}

/* Lesson Body - prose styling */
.icsd-lesson-body {
    font-size: 15px;
    line-height: 1.95;
    color: var(--icsd-text-2);
}
.icsd-lesson-body h2 {
    font-size: 26px;
    font-weight: 800;
    margin: 36px 0 14px;
    padding-top: 12px;
    color: var(--icsd-text);
    line-height: 1.4;
    scroll-margin-top: 80px;
}
.icsd-lesson-body h3 {
    font-size: 21px;
    font-weight: 700;
    margin: 28px 0 12px;
    color: var(--icsd-text);
    line-height: 1.5;
    scroll-margin-top: 80px;
}
.icsd-lesson-body h4 {
    font-size: 17px;
    font-weight: 700;
    margin: 22px 0 10px;
    color: var(--icsd-text);
}
.icsd-lesson-body p {
    margin: 0 0 16px;
}
.icsd-lesson-body strong {
    color: var(--icsd-text);
    font-weight: 700;
}
.icsd-lesson-body a {
    color: var(--tut-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s;
}
.icsd-lesson-body a:hover {
    border-bottom-color: var(--tut-color);
}

.icsd-lesson-body ul,
.icsd-lesson-body ol {
    margin: 0 0 18px;
    padding-right: 24px;
}
.icsd-lesson-body li {
    margin-bottom: 8px;
}
.icsd-lesson-body ul.check-list {
    list-style: none;
    padding-right: 0;
}
.icsd-lesson-body ul.check-list li {
    padding-right: 28px;
    position: relative;
}
.icsd-lesson-body ul.check-list li::before {
    content: '✓';
    position: absolute;
    right: 0;
    top: 0;
    color: var(--tut-color);
    font-weight: 700;
    font-size: 16px;
}

/* Code blocks */
.icsd-lesson-body code {
    background: var(--icsd-surface-2);
    color: var(--tut-color);
    padding: 2px 7px;
    border-radius: 4px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.92em;
    direction: ltr;
    display: inline-block;
    border: 1px solid var(--icsd-border);
}
.icsd-lesson-body pre {
    background: var(--icsd-bg-alt);
    border: 1px solid var(--icsd-border);
    border-right: 3px solid var(--tut-color);
    padding: 18px 20px;
    border-radius: 10px;
    overflow-x: auto;
    margin: 18px 0;
    direction: ltr;
    text-align: left;
}
.icsd-lesson-body pre code {
    background: none;
    border: none;
    padding: 0;
    color: var(--icsd-text);
    font-size: 13px;
    line-height: 1.7;
    display: block;
}

/* Alert boxes (transferred from tutorial HTML) */
.icsd-lesson-body .alert-box,
.icsd-lesson-body .toc-box {
    background: var(--icsd-surface-2);
    border: 1px solid var(--icsd-border);
    border-right: 3px solid var(--tut-color);
    padding: 16px 20px;
    border-radius: 10px;
    margin: 20px 0;
    display: flex;
    gap: 12px;
    align-items: flex-start;
}
.icsd-lesson-body .alert-box .alert-icon {
    font-size: 24px;
    flex-shrink: 0;
}
.icsd-lesson-body .alert-box .alert-title {
    font-weight: 700;
    color: var(--icsd-text);
    margin-bottom: 4px;
}
.icsd-lesson-body .alert-box .alert-content {
    flex: 1;
}

.icsd-lesson-body .toc-box {
    border-right-color: var(--tut-color);
    flex-direction: column;
    gap: 8px;
}
.icsd-lesson-body .toc-box h4 {
    margin: 0 0 8px;
    color: var(--tut-color);
    font-size: 14px;
    font-family: 'JetBrains Mono', 'Vazirmatn', monospace;
}
.icsd-lesson-body .toc-box ul {
    margin: 0;
    padding-right: 18px;
}
.icsd-lesson-body .toc-box li {
    margin-bottom: 4px;
}

/* Tables */
.icsd-lesson-body table {
    width: 100%;
    margin: 18px 0;
    border-collapse: collapse;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--icsd-border);
}
.icsd-lesson-body th,
.icsd-lesson-body td {
    padding: 10px 14px;
    border: 1px solid var(--icsd-border);
    text-align: right;
    font-size: 14px;
}
.icsd-lesson-body th {
    background: var(--icsd-surface-2);
    color: var(--icsd-text);
    font-weight: 700;
}

/* Blockquote */
.icsd-lesson-body blockquote {
    border-right: 3px solid var(--tut-color);
    padding: 12px 18px;
    margin: 18px 0;
    color: var(--icsd-text-muted);
    background: var(--icsd-surface-2);
    border-radius: 6px;
    font-style: italic;
}

/* Images */
.icsd-lesson-body img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 14px 0;
}

/* ===== Lesson Navigation (next/prev) ===== */
.icsd-lesson-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-top: 40px;
    padding-top: 28px;
    border-top: 1px solid var(--icsd-border);
}
.icsd-lesson-nav-link {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 16px 20px;
    background: var(--icsd-surface-2);
    border: 1px solid var(--icsd-border);
    border-radius: 12px;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.icsd-lesson-nav-link:hover {
    border-color: var(--tut-color);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(var(--tut-color-rgb), 0.15);
}
.icsd-lesson-nav-link.next {
    text-align: left;
}
.icsd-lesson-nav-link .dir {
    font-family: 'JetBrains Mono', 'Vazirmatn', monospace;
    font-size: 11px;
    color: var(--tut-color);
    text-transform: lowercase;
}
.icsd-lesson-nav-link .title {
    color: var(--icsd-text);
    font-size: 14px;
    font-weight: 600;
    line-height: 1.4;
}
.icsd-lesson-nav-link.is-finish {
    background: linear-gradient(135deg, rgba(var(--tut-color-rgb), 0.1), rgba(var(--tut-color-rgb), 0.05));
    border-color: var(--tut-color);
}
.icsd-lesson-nav-link.is-finish .dir {
    color: var(--tut-color);
    font-size: 12px;
}

/* ===== Responsive ===== */
@media (max-width: 991px) {
    .icsd-lesson-grid {
        grid-template-columns: 1fr;
    }
    .icsd-lesson-sidebar {
        position: static;
        max-height: none;
        order: 2;
    }
    .icsd-lesson-content {
        order: 1;
        padding: 24px 22px;
    }
}
@media (max-width: 575px) {
    .icsd-lesson-content {
        padding: 20px 16px;
    }
    .icsd-lesson-title {
        font-size: 24px;
    }
    .icsd-lesson-body {
        font-size: 14px;
    }
    .icsd-lesson-body h2 {
        font-size: 21px;
    }
    .icsd-lesson-body h3 {
        font-size: 18px;
    }
    .icsd-lesson-nav {
        grid-template-columns: 1fr;
    }
    .icsd-lesson-breadcrumb {
        font-size: 11px;
    }
    .icsd-lesson-breadcrumb .current {
        display: none; /* در موبایل برای جلوگیری از تداخل */
    }
}

/* ============================================
   TUTORIALS HOME SECTION - سکشن آموزش‌ها در صفحه اصلی
   ============================================ */
.icsd-tutorials-home-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.icsd-tutorial-home-card {
    background: var(--icsd-surface);
    border: 1px solid var(--icsd-border);
    border-radius: 16px;
    overflow: hidden;
    text-decoration: none;
    display: flex;
    flex-direction: column;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    --tut-color: var(--icsd-primary);
}
.icsd-tutorial-home-card:hover {
    transform: translateY(-6px);
    border-color: var(--tut-color);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.12);
}
.icsd-tutorial-home-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--tut-color), var(--icsd-primary-light));
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 2;
}
.icsd-tutorial-home-card:hover::before {
    transform: scaleX(1);
}

.icsd-tutorial-home-card-head {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: linear-gradient(135deg, var(--icsd-primary-soft), var(--icsd-bg-alt));
}
.icsd-tutorial-home-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1), filter 0.5s ease;
    display: block;
    filter: grayscale(100%);
}
.icsd-tutorial-home-card:hover .icsd-tutorial-home-cover img {
    transform: scale(1.06);
    filter: grayscale(0%);
}
.icsd-tutorial-home-icon {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
    line-height: 1;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.icsd-tutorial-home-card:hover .icsd-tutorial-home-icon {
    transform: scale(1.1) rotate(-5deg);
}
.icsd-tutorial-home-level {
    position: absolute;
    top: 12px;
    left: 12px;
    background: rgba(10, 14, 23, 0.85);
    color: var(--tut-color);
    font-family: 'JetBrains Mono', 'Vazirmatn', monospace;
    font-size: 11px;
    padding: 4px 10px;
    border-radius: 100px;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.icsd-tutorial-home-body {
    padding: 18px 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex: 1;
}
.icsd-tutorial-home-title {
    margin: 0;
    font-size: 18px;
    font-weight: 700;
    color: var(--icsd-text);
    line-height: 1.4;
    transition: color 0.2s;
}
.icsd-tutorial-home-card:hover .icsd-tutorial-home-title {
    color: var(--tut-color);
}
.icsd-tutorial-home-desc {
    color: var(--icsd-text-muted);
    font-size: 13px;
    line-height: 1.7;
    margin: 0;
}
.icsd-tutorial-home-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 4px;
}
.icsd-tutorial-home-meta .meta-item {
    font-family: 'JetBrains Mono', 'Vazirmatn', monospace;
    font-size: 11px;
    color: var(--icsd-text-muted);
    background: var(--icsd-surface-2);
    padding: 3px 9px;
    border-radius: 100px;
    border: 1px solid var(--icsd-border);
}
.icsd-tutorial-home-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: 12px;
    border-top: 1px solid var(--icsd-border);
    font-family: 'JetBrains Mono', 'Vazirmatn', monospace;
    font-size: 11px;
}
.icsd-tutorial-home-footer .tech {
    color: var(--icsd-text-muted);
}
.icsd-tutorial-home-footer .go {
    color: var(--tut-color);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: gap 0.3s;
}
.icsd-tutorial-home-card:hover .icsd-tutorial-home-footer .go {
    gap: 8px;
}

@media (max-width: 991px) {
    .icsd-tutorials-home-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 575px) {
    .icsd-tutorials-home-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }
    .icsd-tutorial-home-title {
        font-size: 16px;
    }
}