/**
 * ProwessApps V4 - Unified Tutorial Stylesheet
 * Replaces both tutorial.css and tutorial-lesson-layout.css.
 * Load after header-menu-section.css and Prism, before global-responsive-fix.css.
 */

:root {
    --pa-tutorial-navy: #17324d;
    --pa-tutorial-text: #334155;
    --pa-tutorial-muted: #64748b;
    --pa-tutorial-border: #d8e2ec;
    --pa-tutorial-orange: #e85d04;
    --pa-tutorial-orange-dark: #9a3b00;
    --pa-tutorial-orange-soft: #ffeadb;
    --pa-tutorial-blue: #1769e0;
    --pa-tutorial-green: #198754;
    --pa-tutorial-reading-width: 76ch;
}

/* =========================================================
   1. PAGE LAYOUT
   ========================================================= */
.pa-lesson-shell {
    width: 100%;
    max-width: none;
    margin-inline: auto;
    padding-inline: .75rem !important;
}

.pa-lesson-grid {
    display: grid;
    grid-template-columns: minmax(16.5rem, 18rem) minmax(0, 1fr) minmax(12rem, 14.5rem);
    gap: clamp(1rem, 1.4vw, 1.5rem);
    align-items: start;
    width: 100%;
    min-width: 0;
}

.pa-lesson-navigation-rail,
.tutorial-article,
.pa-lesson-ad-rail {
    min-width: 0;
    max-width: 100%;
}

.tutorial-article,
.pa-reading-content {
    width: 100%;
    min-width: 0;
    max-width: 100%;
}

.tutorial-article {
    margin: 0;
}

/* =========================================================
   2. INDEX-STYLE COURSE SIDEBAR
   ========================================================= */
.pa-lesson-navigation-rail {
    position: sticky;
    top: calc(var(--pa-header-height, 4.25rem) + 1rem);
    height: calc(100dvh - var(--pa-header-height, 4.25rem) - 2rem);
}

.pa-course-sidebar {
    display: grid;
    grid-template-rows: auto minmax(0, 1fr) auto;
    width: 100%;
    height: 100%;
    min-height: 0;
    overflow: hidden;
    color: var(--pa-tutorial-text);
    background: #fff;
    border: 1px solid var(--pa-tutorial-border);
    border-radius: 1rem;
    box-shadow: 0 .35rem 1.25rem rgba(15, 23, 42, .07);
}

.pa-course-sidebar-header {
    padding: .95rem .9rem .8rem;
    background: #fff;
    border-bottom: 1px solid #e3e9ef;
}

.pa-course-sidebar-title {
    display: flex;
    min-width: 0;
    align-items: flex-start;
    gap: .6rem;
    color: var(--pa-tutorial-navy);
    font-weight: 800;
}

.pa-course-sidebar-title i {
    flex: 0 0 auto;
    margin-top: .15rem;
    color: var(--pa-tutorial-orange);
    font-size: 1.15rem;
}

.pa-course-sidebar-title span {
    min-width: 0;
    overflow-wrap: anywhere;
    font-size: .95rem;
    line-height: 1.3;
}

.pa-course-sidebar-header > a {
    display: inline-block;
    margin-top: .35rem;
    color: #c94f00;
    font-size: .75rem;
    font-weight: 700;
    text-decoration: none;
}

.pa-course-sidebar-scroll {
    min-height: 0;
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-color: #9aa5b1 transparent;
    scrollbar-width: thin;
}

.pa-course-sidebar-scroll::-webkit-scrollbar {
    width: .4rem;
}

.pa-course-sidebar-scroll::-webkit-scrollbar-track {
    background: transparent;
}

.pa-course-sidebar-scroll::-webkit-scrollbar-thumb {
    background: #9aa5b1;
    border-radius: 999px;
}

.pa-course-sidebar-module {
    padding: .9rem .55rem .25rem;
}

.pa-course-sidebar-module h2 {
    margin: 0 0 .35rem;
    padding: 0 .5rem;
    color: #68768a;
    font-size: .7rem;
    font-weight: 800;
    letter-spacing: .055em;
    line-height: 1.35;
    text-transform: uppercase;
}

.pa-course-sidebar-module ol {
    margin: 0;
    padding: 0;
    list-style: none;
}

.pa-course-sidebar-module li {
    margin: .1rem 0;
}

.pa-course-sidebar-module a {
    display: flex;
    min-width: 0;
    min-height: 2.45rem;
    align-items: center;
    gap: .55rem;
    padding: .52rem .55rem;
    color: var(--pa-tutorial-text);
    border-left: 3px solid transparent;
    border-radius: .65rem;
    font-size: .8rem;
    font-weight: 600;
    line-height: 1.3;
    text-decoration: none;
}

.pa-course-sidebar-module a i {
    width: 1rem;
    flex: 0 0 1rem;
    color: #0ea5e9;
    text-align: center;
    font-size: .8rem;
}

.pa-course-sidebar-module a span {
    min-width: 0;
    overflow-wrap: anywhere;
}

.pa-course-sidebar-module a:hover,
.pa-course-sidebar-module a:focus-visible {
    color: #c94f00;
    background: #fff3e8;
    border-left-color: #f97316;
}

.pa-course-sidebar-module .is-active a {
    color: var(--pa-tutorial-orange-dark);
    background: var(--pa-tutorial-orange-soft);
    border-left-color: #f97316;
    font-weight: 800;
}

.pa-course-sidebar-module .is-active a i {
    color: #f97316;
}

.pa-course-sidebar-footer {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: .3rem;
    padding: .7rem .6rem;
    color: var(--pa-tutorial-muted);
    background: #f8fafc;
    border-top: 1px solid #e3e9ef;
    text-align: center;
}

.pa-course-sidebar-footer strong {
    color: var(--pa-tutorial-navy);
    font-size: .72rem;
}

.pa-course-sidebar-footer span {
    font-size: .66rem;
}

/* Legacy sidebar compatibility */
.tutorial-sidebar {
    width: 100%;
    min-width: 0;
}

/* =========================================================
   3. ARTICLE TYPOGRAPHY
   ========================================================= */
.pa-reading-content {
    color: var(--pa-tutorial-text);
    font-size: 1rem;
    line-height: 1.72;
}

.pa-reading-content p,
.pa-reading-content li,
.pa-reading-content td,
.pa-reading-content th {
    font-size: 1rem;
}

.pa-reading-content p,
.pa-reading-content ul,
.pa-reading-content ol {
    max-width: var(--pa-tutorial-reading-width);
}

.pa-reading-content section {
    scroll-margin-top: calc(var(--pa-header-height, 4.25rem) + 1.25rem);
}

.pa-breadcrumb .breadcrumb {
    margin-bottom: 1.15rem;
    font-size: .9rem;
}

.tutorial-article h1,
.pa-reading-content h1 {
    max-width: 20ch;
    margin: 0 0 .7rem;
    color: var(--pa-tutorial-navy);
    font-size: clamp(2.15rem, 3.25vw, 3.35rem);
    font-weight: 850;
    line-height: 1.08;
    letter-spacing: -.035em;
    text-wrap: balance;
}

.pa-reading-content h2 {
    margin: 2.35rem 0 .8rem;
    color: var(--pa-tutorial-navy);
    font-size: clamp(1.5rem, 2.15vw, 2.05rem);
    font-weight: 820;
    line-height: 1.22;
    letter-spacing: -.024em;
}

.pa-reading-content h3 {
    margin: 1.6rem 0 .6rem;
    color: var(--pa-tutorial-navy);
    font-size: clamp(1.18rem, 1.45vw, 1.4rem);
    font-weight: 760;
    line-height: 1.3;
}

.pa-lesson-intro {
    max-width: 72ch;
    margin-bottom: 1.35rem;
    color: #475569;
    font-size: clamp(1.03rem, 1.12vw, 1.14rem) !important;
    line-height: 1.7;
}

.pa-lesson-module-label,
.pa-lesson-block-label {
    margin: 0 0 .45rem;
    color: var(--pa-tutorial-orange);
    font-size: .76rem !important;
    font-weight: 850;
    letter-spacing: .045em;
    text-transform: uppercase;
}

.lesson-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .4rem .7rem;
    margin-bottom: 1rem;
    color: #6b7280;
    font-size: .9rem;
}

.lesson-meta span,
.lesson-meta time {
    white-space: nowrap;
}

.lesson-progress-wrap {
    margin-bottom: 1.65rem;
}

.lesson-progress-bar {
    height: .45rem;
    margin-bottom: .45rem;
    overflow: hidden;
    background: #e5e7eb;
    border-radius: 999px;
}

.lesson-progress-fill {
    height: 100%;
    background: var(--pa-tutorial-green);
    border-radius: inherit;
    transition: width .3s ease;
}

.lesson-progress-text {
    color: #94a3b8;
    font-size: .8rem;
}

/* =========================================================
   4. CONTENT COMPONENTS
   ========================================================= */
.lesson-answer-box,
.progress-complete-box,
.lesson-faq,
.pa-callout,
.toc-box,
.pa-toc-box,
.pa-example-box,
.table-responsive,
.pa-output-box,
.pa-lesson-summary,
.pa-mistakes-box,
.pa-related-topics-box,
.pa-mcq-widget,
.lesson-navigation,
.pa-discussion-wrapper {
    width: 100%;
    max-width: 100%;
}

.lesson-answer-box,
.progress-complete-box,
.lesson-faq {
    padding: 1.15rem 1.3rem;
    margin: 1.4rem 0;
    border: 1px solid var(--pa-tutorial-border);
    border-radius: .75rem;
}

.lesson-answer-box {
    color: var(--pa-tutorial-text);
    background: #f2f7ff;
    border-left: 4px solid var(--pa-tutorial-blue);
}

.lesson-answer-box h2 {
    margin: .1rem 0 .55rem;
    font-size: clamp(1.35rem, 1.8vw, 1.7rem) !important;
}

.lesson-answer-box p:last-child,
.progress-complete-box p:last-child,
.lesson-faq p:last-child {
    margin-bottom: 0;
}

.pa-callout {
    padding: 1rem 1.1rem;
    margin: 1.25rem 0;
    border: 1px solid var(--pa-tutorial-border);
    border-left: 4px solid;
    border-radius: .65rem;
}

.pa-callout h2,
.pa-callout h3 {
    margin: 0 0 .55rem;
    font-size: 1.35rem !important;
}

.pa-callout p:last-child,
.pa-callout ul:last-child {
    margin-bottom: 0;
}

.pa-callout-info {
    background: #edf9fc;
    border-left-color: #0dcaf0;
}

.pa-callout-warning {
    background: #fff9e8;
    border-left-color: #f4b400;
}

.pa-callout-tip {
    background: #edf8f2;
    border-left-color: var(--pa-tutorial-green);
}

.toc-box,
.pa-toc-box {
    padding: 1.1rem 1.25rem;
    margin: 1.5rem 0 2rem;
    background: #f8fbff;
    border: 1px solid #dbe5ef;
    border-left: 4px solid var(--pa-tutorial-blue);
    border-radius: .65rem;
}

.toc-box strong,
.pa-toc-box strong {
    display: block;
    margin-bottom: .6rem;
    color: #1e293b;
    font-size: 1rem;
}

.toc-box ul,
.pa-toc-list {
    margin: 0;
    padding-left: 1.3rem;
    columns: 2;
    column-gap: 2rem;
}

.toc-box li,
.pa-toc-list li {
    margin: 0 0 .32rem;
    break-inside: avoid;
}

.toc-box a,
.pa-toc-list a {
    color: var(--pa-tutorial-blue);
    text-decoration: none;
}

.toc-box a:hover,
.pa-toc-list a:hover {
    text-decoration: underline;
}

.pa-flow-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .6rem;
    margin: 1rem 0;
    padding: 1rem;
    background: #f8fafc;
    border: 1px solid #dce5ec;
    border-radius: .65rem;
}

.pa-flow-row span {
    padding: .45rem .65rem;
    color: var(--pa-tutorial-navy);
    background: #fff;
    border: 1px solid var(--pa-tutorial-border);
    border-radius: .45rem;
    font-weight: 700;
}

/* =========================================================
   5. CODE, OUTPUT AND TABLES
   ========================================================= */
.pa-example-box {
    overflow: hidden;
    background: #131722;
    border: 1px solid #2a3143;
    border-radius: .65rem;
    box-shadow: 0 .25rem 1rem rgba(0, 0, 0, .2);
    margin: 1.5rem 0;
}

.pa-example-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: .85rem 1rem .5rem 1rem;
    color: #e2e8f0;
    background: #131722;
    border-bottom: 0;
}

.pa-code-wrapper {
    margin-top: -1rem;
    width: 100%;
    min-width: 0;
    max-width: 100%;
    overflow: hidden;
    border-color: #343a40 !important;
}

.pa-code-wrapper pre,
.pa-code-wrapper pre[class*="language-"],
.pa-code-wrapper code[class*="language-"] {
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    margin: 0 !important;
}

.pa-code-wrapper pre,
.pa-code-wrapper pre[class*="language-"] {
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding: 0 1rem 1rem 1rem !important;
    border-radius: 0 !important;
}

.pa-output-box {
    overflow-x: auto;
}

.table-responsive {
    margin: 1.5rem 0;
    overflow-x: auto;
    background: #fff;
    border: 1px solid #dce5ec;
    border-radius: .75rem;
    box-shadow: 0 .15rem .65rem rgba(15, 23, 42, .04);
    -webkit-overflow-scrolling: touch;
}

.pa-tutorial-table {
    display: table;
    width: 100%;
    min-width: 42rem;
    margin: 0;
    border-collapse: separate;
    border-spacing: 0;
    background: #fff;
}

.pa-tutorial-table th,
.pa-tutorial-table td {
    padding: .85rem 1rem;
    text-align: left;
    vertical-align: top;
    border-bottom: 1px solid #e2e8f0;
}

.pa-tutorial-table th {
    color: #fff;
    background: #17395b;
    font-size: .78rem;
    font-weight: 800;
    letter-spacing: .04em;
    text-transform: uppercase;
    white-space: nowrap;
}

.pa-tutorial-table tr:last-child td {
    border-bottom: 0;
}

.pa-tutorial-table tbody tr:hover {
    background: #f8fafc;
}

/* =========================================================
   6. MISTAKES, SUMMARY, FAQ AND RELATED CONTENT
   ========================================================= */
.pa-reading-content .pa-mistakes-title {
    margin: 2.15rem 0 .8rem;
    color: #b42332 !important;
    font-size: clamp(1.45rem, 2vw, 1.85rem) !important;
    font-weight: 800;
    line-height: 1.22;
    letter-spacing: -.02em;
}

.pa-reading-content .pa-mistakes-box {
    padding: 1rem 1.2rem;
    margin: 0 0 1.65rem;
    color: #343a40;
    background: #fff4e6;
    border: 1px solid #ffd09a;
    border-left: 4px solid #f08c00;
    border-radius: .65rem;
}

.pa-reading-content .pa-mistakes-box ul,
.pa-reading-content .pa-lesson-summary ul {
    margin: 0;
    padding-left: 1.35rem;
}

.pa-reading-content .pa-mistakes-box li,
.pa-reading-content .pa-lesson-summary li {
    margin-bottom: .35rem;
    font-size: 1rem;
    line-height: 1.55;
}

.pa-reading-content .pa-mistakes-box li:last-child,
.pa-reading-content .pa-lesson-summary li:last-child {
    margin-bottom: 0;
}

.pa-reading-content .pa-lesson-summary {
    padding: 1.1rem 1.25rem;
    margin: 1.65rem 0;
    color: #145a3a;
    background: #e3f5eb;
    border: 1px solid #b8dfc9;
    border-left: 4px solid var(--pa-tutorial-green);
    border-radius: .65rem;
}

.pa-reading-content .pa-lesson-summary h2,
.pa-reading-content .pa-lesson-summary h3,
.pa-reading-content .pa-lesson-summary h4 {
    margin: 0 0 .65rem;
    color: #145a3a !important;
    font-size: clamp(1.35rem, 1.8vw, 1.65rem) !important;
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: -.015em;
}

.pa-reading-content .pa-lesson-summary ul {
    color: #243447;
}

.pa-related-topics-box {
    padding: 1.1rem 1.2rem;
    background: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: .6rem;
}

.pa-related-topics-box h2,
.pa-related-topics-box h3 {
    margin-top: 0;
}

.lesson-faq h2,
.progress-complete-box h2,
.pa-mcq-widget h2 {
    margin-top: 0;
    font-size: 1.4rem !important;
}

/* =========================================================
   7. NAVIGATION, DISCUSSION AND ADS
   ========================================================= */
.lesson-navigation {
    display: flex;
    align-items: stretch;
    justify-content: space-between;
    gap: 1rem;
    margin: 2.35rem 0 1rem;
    padding-top: 1.4rem;
    border-top: 1px solid #e5e7eb;
}

.pa-nav-btn {
    display: inline-flex;
    min-width: 0;
    align-items: center;
    gap: .5rem;
    padding: .6rem 1rem;
    color: #0f5132;
    background: transparent;
    border: 1px solid #0f5132;
    border-radius: .45rem;
    font-weight: 600;
    text-decoration: none;
}

.pa-nav-btn:hover {
    color: #0f5132;
    background: #dff3e8;
}

.pa-discussion-wrapper {
    padding: 1.25rem;
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: .75rem;
}

.pa-ad-placeholder,
.tutorial-ad {
    display: grid;
    width: 100%;
    min-width: 0;
    min-height: 8rem;
    place-items: center;
    align-content: center;
    gap: .25rem;
    margin: 1.5rem 0;
    padding: 1rem;
    overflow: hidden;
    color: var(--pa-tutorial-muted);
    background: rgba(255, 255, 255, .45);
    border: 1px dashed #b8c5d2;
    border-radius: .65rem;
    text-align: center;
}

.pa-ad-placeholder span {
    font-weight: 700;
}

.pa-ad-placeholder small {
    font-size: .75rem;
}

.pa-ad-placeholder-compact {
    min-height: 6rem;
}

.pa-ad-placeholder-rail {
    min-height: 15rem;
    margin: 0;
}

.pa-lesson-ad-sticky {
    position: sticky;
    top: calc(var(--pa-header-height, 4.25rem) + 1rem);
    display: grid;
    gap: 1rem;
}

.pa-module-summary {
    display: grid;
    gap: .25rem;
    padding: 1rem;
    background: rgba(255, 255, 255, .8);
    border: 1px solid #dce5ec;
    border-radius: .65rem;
}

.pa-module-summary strong {
    color: var(--pa-tutorial-navy);
}

.pa-module-summary span {
    color: var(--pa-tutorial-muted);
    font-size: .82rem;
}

/* =========================================================
   8. MOBILE/TABLET LESSON DRAWER
   ========================================================= */
.pa-lesson-toolbar {
    position: sticky;
    top: calc(var(--pa-header-height, 4.25rem) + 0.5rem);
    z-index: 1020;
    display: flex;
    justify-content: flex-end;
    margin-bottom: .85rem;
    pointer-events: none;
}

.pa-lessons-open-button {
    pointer-events: auto;
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    min-height: 2.6rem;
    padding: .5rem .8rem;
    color: var(--pa-tutorial-orange-dark);
    background: #fff3e8;
    border: 1px solid #fdba74;
    border-radius: .6rem;
    font-size: .86rem;
    font-weight: 750;
}

.pa-lessons-open-button:hover,
.pa-lessons-open-button:focus-visible {
    color: #7c2d00;
    background: var(--pa-tutorial-orange-soft);
    border-color: #f97316;
}

.pa-lesson-drawer {
    --bs-offcanvas-width: min(88vw, 25rem);
    width: min(88vw, 25rem) !important;
    max-width: 100%;
}

.pa-lesson-drawer-header {
    color: #fff;
    background: var(--pa-tutorial-navy);
}

.pa-lesson-drawer-header small {
    color: #c9d8e6;
}

.pa-lesson-drawer .offcanvas-body,
.pa-lesson-drawer .pa-course-sidebar {
    height: 100%;
    min-height: 0;
}

.pa-lesson-drawer .pa-course-sidebar {
    border: 0;
    border-radius: 0;
    box-shadow: none;
}

/* =========================================================
   9. RESPONSIVE TYPOGRAPHY AND LAYOUT
   ========================================================= */
@media (min-width: 1200px) and (max-width: 1499.98px) {
    .pa-lesson-shell {
        padding-inline: .65rem !important;
    }

    .pa-lesson-grid {
        grid-template-columns: minmax(15rem, 16.5rem) minmax(0, 1fr) minmax(10.5rem, 12rem);
        gap: 1rem;
    }

    .pa-course-sidebar-title span {
        font-size: .9rem;
    }
}

@media (min-width: 1600px) {
    .pa-lesson-shell {
        padding-inline: 1rem !important;
    }

    .pa-lesson-grid {
        grid-template-columns: minmax(17rem, 18.5rem) minmax(0, 1fr) minmax(13rem, 15rem);
        gap: 1.5rem;
    }
}

@media (max-width: 1199.98px) {
    .pa-lesson-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .pa-reading-content {
        font-size: .96rem;
        line-height: 1.66;
    }

    .pa-reading-content p,
    .pa-reading-content li,
    .pa-reading-content td,
    .pa-reading-content th {
        font-size: .96rem;
    }

    .tutorial-article h1,
    .pa-reading-content h1 {
        max-width: 100%;
        font-size: clamp(2rem, 4.8vw, 2.65rem);
    }

    .pa-reading-content h2 {
        font-size: clamp(1.4rem, 3vw, 1.8rem);
    }
}

@media (max-width: 767.98px) {
    .pa-lesson-shell {
        padding-inline: .85rem !important;
    }

    .pa-reading-content {
        font-size: .94rem;
        line-height: 1.64;
    }

    .pa-reading-content p,
    .pa-reading-content li,
    .pa-reading-content td,
    .pa-reading-content th {
        font-size: .94rem;
    }

    .tutorial-article h1,
    .pa-reading-content h1 {
        font-size: clamp(1.75rem, 8vw, 2.15rem);
        line-height: 1.12;
    }

    .pa-reading-content h2 {
        margin-top: 1.85rem;
        font-size: clamp(1.3rem, 6vw, 1.58rem);
    }

    .pa-reading-content h3 {
        font-size: clamp(1.08rem, 4.8vw, 1.24rem);
    }

    .pa-lesson-intro {
        font-size: .98rem !important;
        line-height: 1.62;
    }

    .lesson-meta {
        gap: .25rem .45rem;
        font-size: .8rem;
    }

    .lesson-answer-box,
    .progress-complete-box,
    .lesson-faq,
    .pa-callout,
    .toc-box,
    .pa-toc-box,
    .pa-lesson-summary,
    .pa-mistakes-box,
    .pa-related-topics-box,
    .pa-mcq-widget,
    .pa-discussion-wrapper {
        padding: .9rem 1rem;
        margin-block: 1.1rem;
    }

    .toc-box ul,
    .pa-toc-list {
        columns: 1;
    }

    .pa-reading-content .pa-mistakes-title {
        margin: 1.7rem 0 .7rem;
        font-size: 1.35rem !important;
    }

    .pa-reading-content .pa-lesson-summary h2,
    .pa-reading-content .pa-lesson-summary h3,
    .pa-reading-content .pa-lesson-summary h4 {
        font-size: 1.25rem !important;
    }

    .lesson-navigation {
        flex-direction: column;
    }

    .pa-nav-btn {
        width: 100%;
        justify-content: center;
    }

    .pa-flow-row {
        align-items: stretch;
        flex-direction: column;
    }

    .pa-flow-row i {
        align-self: center;
        transform: rotate(90deg);
    }

    .pa-code-wrapper pre,
    .pa-code-wrapper code,
    .pa-output-box,
    .pa-output-box code {
        font-size: .82rem !important;
    }
}

@media (max-width: 374.98px) {
    .pa-reading-content,
    .pa-reading-content p,
    .pa-reading-content li {
        font-size: .92rem;
    }

    .tutorial-article h1,
    .pa-reading-content h1 {
        font-size: 1.7rem;
    }

    .pa-reading-content h2 {
        font-size: 1.28rem;
    }

    .pa-reading-content .pa-mistakes-title {
        font-size: 1.25rem !important;
    }

    .pa-reading-content .pa-lesson-summary h2,
    .pa-reading-content .pa-lesson-summary h3,
    .pa-reading-content .pa-lesson-summary h4 {
        font-size: 1.18rem !important;
    }
}

@media (prefers-reduced-motion: reduce) {
    .lesson-progress-fill,
    .pa-course-sidebar-module a,
    .pa-nav-btn {
        transition: none !important;
    }
}

/* Custom tiny scrollbar for mistakes box code snippets */
.pa-mistakes-box pre {
    scrollbar-width: thin;
    scrollbar-color: rgba(0, 0, 0, 0.15) transparent;
}

.pa-mistakes-box pre::-webkit-scrollbar {
    height: 4px;
}

.pa-mistakes-box pre::-webkit-scrollbar-track {
    background: transparent;
}

.pa-mistakes-box pre::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.15);
    border-radius: 10px;
}

/* =========================================================
   10. AUTHOR BYLINE
   ========================================================= */
.pa-lesson-byline {
    margin: -0.35rem 0 1rem;
    color: #64748b;
    font-size: 0.85rem;
}
.pa-lesson-byline a {
    color: #1769e0;
    font-weight: 650;
    text-decoration: none;
}
.pa-lesson-byline a:hover {
    text-decoration: underline;
}