/* ============================================================
   platform-ui-content.css
   Platform.Ui.Components content rendering styles
   ============================================================ */

:root {
    --ls-text-primary: var(--pui-color-text-primary, #0F172A);
    --ls-text-secondary: var(--pui-color-text-secondary, #334155);
    --ls-text-muted: var(--pui-color-text-muted, #64748B);
    --ls-toc-text: var(--pui-color-text-secondary, #475569);
    --ls-bg-page: var(--pui-color-surface-page, #FFFFFF);
    --ls-bg-section: var(--pui-color-surface-muted, #F8FAFC);
    --ls-bg-component: var(--pui-color-surface-muted, #F1F5F9);
    --ls-border: var(--pui-color-border-default, #E2E8F0);
    --ls-accent: var(--pui-color-action-primary, #2563EB);
    --ls-accent-soft: var(--pui-color-accent-soft, #DBEAFE);
    --ls-space-1: var(--pui-space-1, 2px);
    --ls-space-2: var(--pui-space-2, 4px);
    --ls-space-3: var(--pui-space-3, 6px);
    --ls-space-4: var(--pui-space-4, 8px);
    --ls-space-5: var(--pui-space-5, 12px);
    --ls-space-6: var(--pui-space-6, 16px);
    --ls-space-7: var(--pui-space-7, 24px);
    --ls-space-8: var(--pui-space-8, 32px);
    --ls-font-stack: var(--pui-font-family-base, Inter, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif);
}

/* ---- Scoped typography ---- */
.content-preview {
    font-family: var(--ls-font-stack);
    color: var(--ls-text-primary);
}

.content-preview a {
    color: var(--ls-accent);
    text-decoration: none;
    font-weight: 500;
}

.content-preview a:hover {
    text-decoration: underline;
}

.content-preview :focus-visible {
    outline: 2px solid var(--ls-accent);
    outline-offset: 2px;
}

.content-preview p,
.content-preview li,
.content-preview dd,
.content-preview dt {
    color: var(--ls-text-secondary);
    font-size: 18px;
    font-weight: 400;
    line-height: 1.75;
}

.content-preview h1,
.content-preview h2,
.content-preview h3 {
    color: var(--ls-text-primary);
    line-height: 1.25;
}

/* ---- Shared body panel ---- */
.pui-content-body-panel {
    padding: var(--pui-space-6);
    border: 1px solid var(--pui-color-border-default);
    border-radius: var(--pui-radius-lg);
    background: var(--pui-color-surface-card);
    box-shadow: var(--pui-shadow-soft);
    color: var(--pui-color-text-primary);
}

.pui-content-body-panel__body {
    min-width: 0;
    line-height: var(--pui-line-height-body);
}

.pui-content-body-panel__body > :first-child,
.pui-content-body-panel__body .content-preview > :first-child {
    margin-top: 0;
}

.pui-content-body-panel__body > :last-child,
.pui-content-body-panel__body .content-preview > :last-child {
    margin-bottom: 0;
}

.pui-content-body-panel__body p,
.pui-content-body-panel__body ul,
.pui-content-body-panel__body ol,
.pui-content-body-panel__body blockquote {
    margin-top: 0;
    margin-bottom: var(--pui-space-4);
}

.pui-content-body-panel__body h2,
.pui-content-body-panel__body h3 {
    margin-top: var(--pui-space-6);
    margin-bottom: var(--pui-space-3);
}

/* ---- Article Header ---- */
.article-header {
    border-bottom: 1px solid var(--ls-border);
    padding-bottom: var(--ls-space-5);
    margin-bottom: var(--ls-space-1);
}

.article-header__title {
    font-size: 36px;
    font-weight: 700;
    margin: 0 0 var(--ls-space-4);
    line-height: 1.25;
    color: var(--ls-text-primary);
}

.article-header__meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--ls-space-2) var(--ls-space-4);
    font-size: 14px;
    color: var(--ls-text-muted);
    line-height: 1.5;
}

.article-header__corrections { color: var(--ls-accent); }

/* ---- Content Audio ---- */
.pui-audio-control {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--ls-space-4);
    margin-top: var(--ls-space-4);
    color: var(--ls-text-secondary);
}

.pui-audio-control__button,
.pui-audio-control__select {
    min-height: var(--pui-size-control-md, 40px);
    border: 1px solid var(--ls-border);
    border-radius: var(--pui-radius-md, 8px);
    background: var(--ls-bg-page);
    color: var(--ls-text-primary);
    font: inherit;
}

.pui-audio-control__button {
    padding: 0 var(--ls-space-6);
    cursor: pointer;
}

.pui-audio-control__button:hover {
    border-color: var(--ls-accent);
}

.pui-audio-control__button--icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: var(--pui-size-control-md, 40px);
    padding: 0;
    aspect-ratio: 1;
}

.pui-audio-control__icon {
    width: 20px;
    height: 20px;
}

.pui-audio-control__button:disabled {
    cursor: not-allowed;
    opacity: var(--pui-opacity-disabled, 0.55);
}

.pui-audio-control__ready {
    display: grid;
    gap: var(--ls-space-3);
    width: min(100%, var(--pui-measure-content, 720px));
}

.pui-audio-control__player {
    width: 100%;
}

.pui-audio-control__tools {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--ls-space-4);
}

.pui-audio-control__speed {
    display: inline-flex;
    align-items: center;
    gap: var(--ls-space-3);
    color: var(--ls-text-muted);
}

.pui-audio-control__select {
    padding: 0 var(--ls-space-4);
}

.pui-audio-control__status,
.pui-audio-control__preparing {
    color: var(--ls-text-muted);
    font-size: var(--pui-font-size-sm, 14px);
}

.definition-audio-control {
    display: flex;
    justify-content: flex-start;
    margin: 0 0 var(--ls-space-4);
}

.definition-audio-control--inline {
    margin: 0;
    flex: 0 0 auto;
}

.definition-audio-control > .pui-audio-control {
    margin-top: 0;
}

.definition-detail-section + .definition-detail-section {
    margin-top: var(--ls-space-7);
}

.definition-detail-section__header {
    margin-bottom: var(--ls-space-4);
}

.definition-detail-section__body > :first-child {
    margin-top: 0;
}

.definition-detail-section__body > :last-child {
    margin-bottom: 0;
}

.pui-section-shell > .pui-audio-control {
    margin-bottom: var(--ls-space-4);
}

/* ---- Common article section ---- */
.article-section {
    margin: 0;
    padding: var(--ls-space-7) 0;
    scroll-margin-top: 92px;
}

.article-section + .article-section {
    border-top: 1px solid var(--ls-border);
}

.article-section__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--ls-space-5);
    margin: 0 0 var(--ls-space-5);
}

.article-section__header > .article-section__heading {
    flex: 1 1 auto;
    min-width: 0;
    margin: 0;
}

.article-section__header > .pui-audio-control--icon {
    flex: 0 0 auto;
    margin-top: 0;
}

.article-section__heading {
    --pui-article-section-heading-size: 28px;
    --pui-article-section-heading-line-height: 1.25;
    font-size: var(--pui-article-section-heading-size);
    font-weight: 600;
    line-height: var(--pui-article-section-heading-line-height);
    margin: 0 0 var(--ls-space-5);
    color: var(--ls-text-primary);
}

.article-subsection {
    margin-top: var(--ls-space-6);
    scroll-margin-top: 92px;
}

.article-subsection__heading {
    font-size: 22px;
    font-weight: 600;
    margin: 0 0 var(--ls-space-3);
    color: var(--ls-text-primary);
}

.article-section p,
.article-subsection p,
.worked-examples__intro {
    margin: 0 0 var(--ls-space-4);
}

.article-section ul,
.article-section ol {
    margin: 0 0 var(--ls-space-4);
    padding-left: 1.25rem;
}

/* ---- Definitions ---- */
.definitions-group {
    display: flex;
    flex-direction: column;
    gap: var(--ls-space-4);
    margin-top: var(--ls-space-5);
}

.def-card {
    border: 1px solid var(--ls-border);
    border-radius: 10px;
    overflow: hidden;
    background: var(--ls-bg-page);
    scroll-margin-top: 92px;
}

.def-card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--ls-space-3);
    padding: var(--ls-space-4);
    background: var(--ls-bg-section);
    border: none;
    cursor: pointer;
    width: 100%;
    text-align: left;
}

.def-card__term    { font-size: 22px; font-weight: 600; margin: 0; color: var(--ls-text-primary); }
.def-card__chevron { font-size: 12px; color: var(--ls-text-muted); }

.def-card__body {
    padding: var(--ls-space-4) var(--ls-space-4) var(--ls-space-5);
    border-top: 1px solid var(--ls-border);
}

.def-card__actions { display: flex; justify-content: flex-end; margin-top: var(--ls-space-3); }

/* ---- Walkthrough ---- */
.walkthrough-timeline {
    display: flex;
    flex-direction: column;
    gap: var(--ls-space-3);
    margin-top: var(--ls-space-5);
}

.timeline-step {
    border: 1px solid var(--ls-border);
    border-radius: 10px;
    background: var(--ls-bg-page);
    scroll-margin-top: 92px;
}

.timeline-step__header {
    display: flex;
    align-items: center;
    gap: var(--ls-space-3);
    padding: var(--ls-space-4);
    background: var(--ls-bg-section);
    border: none;
    cursor: pointer;
    width: 100%;
    text-align: left;
}

.timeline-step__number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--ls-accent);
    color: #fff;
    font-weight: 700;
    font-size: 14px;
    flex-shrink: 0;
}

.timeline-step__title  { flex: 1; font-weight: 600; color: var(--ls-text-primary); }
.timeline-step__chevron { font-size: 12px; color: var(--ls-text-muted); }

.timeline-step__body {
    padding: var(--ls-space-4) var(--ls-space-4) var(--ls-space-5);
    border-top: 1px solid var(--ls-border);
}

.walkthrough-controls {
    display: flex;
    gap: var(--ls-space-2);
    margin-top: var(--ls-space-4);
}

/* ---- Decision Loop ---- */
.decision-loop {
    margin-top: var(--ls-space-5);
    padding: 28px;
    border-radius: 12px;
    background: var(--ls-bg-component);
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    counter-reset: decision-step;
}

.dl-panel {
    border: 1px solid var(--ls-border);
    border-radius: 10px;
    background: var(--ls-bg-page);
    scroll-margin-top: 92px;
}

.dl-panel__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--ls-space-3);
    padding: var(--ls-space-4);
    background: transparent;
    border: none;
    cursor: pointer;
    width: 100%;
    text-align: left;
}

.dl-panel__title {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    color: var(--ls-text-primary);
}

.dl-panel__title::before {
    counter-increment: decision-step;
    content: counter(decision-step);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--ls-accent);
    color: #fff;
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
}

.dl-panel__chevron { font-size: 12px; color: var(--ls-text-muted); }

.dl-panel__body {
    padding: var(--ls-space-4) var(--ls-space-4) var(--ls-space-5);
    border-top: 1px solid var(--ls-border);
}

.dl-actions { display: flex; justify-content: flex-start; margin-top: var(--ls-space-4); }

/* ---- Worked Examples ---- */
.worked-examples-group { display: flex; flex-direction: column; gap: var(--ls-space-4); margin-top: var(--ls-space-5); }

.example-card {
    border: 1px solid var(--ls-border);
    border-radius: 10px;
    background: var(--ls-bg-section);
    padding: var(--ls-space-5);
    margin: 0;
    scroll-margin-top: 92px;
}

.example-card__heading {
    font-size: 22px;
    font-weight: 600;
    margin: 0 0 var(--ls-space-3);
    color: var(--ls-text-primary);
}

.example-card__assumptions { margin-top: var(--ls-space-4); }
.example-card__assumptions-list { margin: var(--ls-space-3) 0 0 1rem; }

/* ---- Checklists ---- */
.checklists-group {
    display: flex;
    flex-direction: column;
    gap: var(--ls-space-6);
    margin-top: var(--ls-space-5);
}

.checklist-card {
    border: 1px solid var(--ls-border);
    border-radius: 8px;
    padding: 20px;
    background: var(--ls-bg-section);
    scroll-margin-top: 92px;
    overflow: hidden;
}

.checklist-card__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--ls-space-3);
    margin-bottom: var(--ls-space-4);
}

.checklist-card__title {
    font-size: 22px;
    font-weight: 600;
    margin: 0;
    color: var(--ls-text-primary);
}

.checklist-card__groups {
    display: flex;
    flex-direction: column;
}

.checklist-group + .checklist-group {
    margin-top: var(--ls-space-3);
}

.checklist-group__title {
    margin: var(--ls-space-3) 0 var(--ls-space-2);
    font-size: 16px;
    font-weight: 600;
    color: var(--ls-text-primary);
}

.checklist-group:first-child .checklist-group__title {
    margin-top: 0;
}

.checklist-card__items {
    list-style: none;
    margin: 0;
    padding: 0 0 0 var(--ls-space-3);
    display: flex;
    flex-direction: column;
    gap: var(--ls-space-2);
}

.checklist-group__items {
    margin-bottom: 0;
}

.checklist-card__item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 10px;
    align-items: start;
}

.checklist-card__item input[type="checkbox"] {
    margin-top: .2rem;
    accent-color: var(--ls-accent);
}

.checklist-card__item label {
    min-width: 0;
    word-break: break-word;
    overflow-wrap: anywhere;
}

.checklist-card__item-label {
    grid-column: 1 / -1;
    min-width: 0;
    word-break: break-word;
    overflow-wrap: anywhere;
}

/* Guardrail: prevent inherited writing-mode / text-orientation from ancestors */
.article-section--checklists,
.article-section--checklists * {
    writing-mode: horizontal-tb !important;
    text-orientation: mixed !important;
}

.checklist-card__footer {
    margin-top: var(--ls-space-4);
    padding-top: var(--ls-space-3);
    border-top: 1px solid var(--ls-border);
    font-size: 14px;
    color: var(--ls-text-muted);
}

/* ---- Glossary ---- */
.glossary__search {
    width: 100%;
    padding: var(--ls-space-2) var(--ls-space-3);
    border: 1px solid var(--ls-border);
    border-radius: 8px;
    font-size: 14px;
    color: var(--ls-text-primary);
    background: var(--ls-bg-page);
    margin-bottom: var(--ls-space-5);
}

.glossary-list {
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--ls-space-5);
}

.glossary-entry { scroll-margin-top: 92px; }

.glossary-entry__term {
    font-size: 22px;
    font-weight: 600;
    margin: 0 0 var(--ls-space-2);
    color: var(--ls-text-primary);
}

.glossary-entry__def {
    margin: 0;
    display: flex;
    gap: var(--ls-space-3);
    align-items: flex-start;
    flex-wrap: wrap;
}

.glossary__empty {
    color: var(--ls-text-muted);
    margin: 0;
}

/* ---- Verified Callouts ---- */
.verified-callouts-group {
    display: flex;
    flex-direction: column;
    gap: var(--ls-space-6);
    margin-top: 0;
}

.verified-callout {
    border: 1px solid var(--ls-border);
    border-left: 4px solid var(--ls-accent);
    border-radius: 8px;
    padding: 20px;
    background: var(--ls-bg-component);
    scroll-margin-top: 92px;
}

.verified-callout__header {
    display: flex;
    align-items: center;
    gap: var(--ls-space-3);
    margin-bottom: var(--ls-space-2);
}

.verified-callout__badge {
    font-size: 14px;
    font-weight: 600;
    color: var(--ls-accent);
    background: var(--ls-accent-soft);
    padding: var(--ls-space-1) var(--ls-space-2);
    border-radius: 999px;
}

.verified-callout__date { font-size: 14px; color: var(--ls-text-muted); }

.verified-callout__title {
    font-size: 22px;
    font-weight: 600;
    margin: 0 0 var(--ls-space-2);
    color: var(--ls-text-primary);
}

.verified-callout__text { margin: 0 0 var(--ls-space-3); }

.verified-callout__footer {
    display: flex;
    gap: var(--ls-space-3);
    align-items: center;
    font-size: 14px;
}

.verified-callout__sources-link { color: var(--ls-accent); }

/* ---- Internal Links ---- */
.internal-links__group-heading {
    font-size: 14px;
    font-weight: 600;
    color: var(--ls-text-secondary);
    margin: 0 0 var(--ls-space-2);
}

.internal-links__list {
    list-style: none;
    margin: 0 0 var(--ls-space-5);
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--ls-space-1);
}

.internal-links__link { color: var(--ls-accent); font-size: 16px; }

/* ---- Section Nav Rail ---- */
.section-nav-rail { display: flex; flex-direction: column; gap: var(--ls-space-3); }

.section-nav-rail__heading {
    margin: 0;
    font-size: 14px;
    font-weight: 600;
    color: var(--ls-text-primary);
}

.section-nav-rail__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--ls-space-1);
}

.section-nav-rail__link {
    background: none;
    border: none;
    cursor: pointer;
    display: block;
    width: 100%;
    text-align: left;
    padding: var(--ls-space-1) var(--ls-space-2);
    border-radius: 6px;
    font-size: 14px;
    line-height: 1.5;
    color: var(--ls-toc-text);
}

.section-nav-rail__link:hover {
    background: var(--ls-bg-component);
    color: var(--ls-text-primary);
}

.section-nav-rail__item--active .section-nav-rail__link,
.section-nav-rail__link[aria-current="location"] {
    color: var(--ls-accent);
    font-weight: 600;
}

.section-nav-rail__item--level-2 .section-nav-rail__link { padding-left: var(--ls-space-5); }

.section-nav-rail__item--backtop {
    margin-top: var(--ls-space-3);
    padding-top: var(--ls-space-3);
    border-top: 1px solid var(--ls-border);
}

.section-nav-rail__link--backtop {
    font-size: 13px;
    color: var(--ls-text-muted);
}

.section-nav-rail--scrollable .section-nav-rail__list {
    overflow-y: auto;
    max-height: 80vh;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.section-nav-rail--scrollable .section-nav-rail__list::-webkit-scrollbar {
    display: none;
}

/* ---- Sources accordion (blog content type) ---- */
.sources-accordion {
    border: 1px solid var(--ls-border);
    border-radius: 10px;
    overflow: hidden;
    margin-top: var(--ls-space-5);
}

.sources-accordion__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--ls-space-3);
    padding: var(--ls-space-4);
    background: var(--ls-bg-section);
    border: none;
    cursor: pointer;
    width: 100%;
    text-align: left;
    font-size: 18px;
    font-weight: 600;
    color: var(--ls-text-primary);
}

.sources-accordion__chevron {
    transition: transform 0.2s ease;
    color: var(--ls-text-muted);
}

.sources-accordion--open .sources-accordion__chevron {
    transform: rotate(180deg);
}

.sources-accordion__panel {
    display: none;
    border-top: 1px solid var(--ls-border);
}

.sources-accordion--open .sources-accordion__panel {
    display: block;
}

.sources-accordion__inner {
    padding: var(--ls-space-4);
}

.sources-accordion__scroll {
    max-height: 400px;
    overflow-y: auto;
}

/* ---- Small utility buttons ---- */
.btn-icon,
.btn-ghost {
    border: 1px solid var(--ls-border);
    border-radius: 8px;
    cursor: pointer;
    color: var(--ls-text-secondary);
    background: var(--ls-bg-page);
}

.btn-icon {
    font-size: 14px;
    padding: var(--ls-space-1) var(--ls-space-3);
}

.btn-ghost {
    padding: var(--ls-space-2) var(--ls-space-4);
    font-size: 14px;
}

.btn-icon:hover,
.btn-ghost:hover {
    background: var(--ls-bg-component);
}

.btn-sm {
    font-size: 14px;
    padding: var(--ls-space-1) var(--ls-space-3);
}

/* ---- Focus-visible styles for interactive controls ---- */
.timeline-step__header:focus-visible,
.dl-panel__header:focus-visible,
.section-nav-rail__link:focus-visible,
.walkthrough-controls .btn-ghost:focus-visible,
.dl-actions .btn-ghost:focus-visible,
.example-card .btn-ghost:focus-visible,
.btn-icon:focus-visible,
.btn-ghost:focus-visible {
    border-radius: 6px;
}

/* ---- Generic section ---- */
.article-section--generic ul { padding-left: 1.25rem; }

/* ---- Breakpoints for section content ---- */
@media (max-width: 768px) {
    .content-preview .article-header__title { font-size: 32px; }
    .content-preview .article-section__heading { --pui-article-section-heading-size: 26px; }
    .content-preview .article-subsection__heading,
    .content-preview .example-card__heading,
    .content-preview .checklist-card__title,
    .content-preview .verified-callout__title,
    .content-preview .glossary-entry__term,
    .content-preview .def-card__term { font-size: 22px; }

    .decision-loop { padding: var(--ls-space-5); }
}