/* ============================================================
   Single-article page — modern editorial layout.
   Brand-token-only; no literal hex values.
   RTL-safe via CSS logical properties.
   ============================================================ */

/* ── Region A — Reading progress bar ─────────────────────── */
.article-progress {
    position: fixed;
    top: 64px;                               /* sits directly under the sticky navbar */
    inset-inline: 0;
    height: 3px;
    background: color-mix(in srgb, var(--color-border) 30%, transparent);
    z-index: 1100;
    opacity: 0;
    transition: opacity 200ms ease-out;
    pointer-events: none;
    overflow: hidden;
}
@media (max-width: 767.98px) {
    .article-progress { top: 56px; }         /* mobile navbar is 56px */
}
.article-progress__fill {
    height: 100%;
    width: 100%;
    background: var(--brand-gradient);
    transform: scaleX(0);
    transform-origin: left center;
    will-change: transform;
}
[dir="rtl"] .article-progress__fill { transform-origin: right center; }
.article-progress.is-visible { opacity: 1; }

/* ── Article shell ──────────────────────────────────────── */
.article-page {
    background: var(--color-bg);
    color: var(--color-text);
}

/* ── Region B — Editorial header (compact, left-aligned) ───── */
.article-page__header {
    background: var(--color-bg);
    padding-block: var(--sp-8) var(--sp-6);
    padding-inline: var(--sp-4);
}
.article-page__header-inner {
    max-width: 760px;
    margin-inline: auto;
    text-align: start;
}

.article-page__topics {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-2);
    margin-bottom: var(--sp-4);
}
.article-page__chip {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: var(--r-pill);
    background: var(--brand-50);
    color: var(--brand-500);
    font-size: 12px;
    font-weight: var(--fw-bold);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    text-decoration: none;
    transition: background-color var(--t-fast);
}
.article-page__chip:hover {
    background: var(--brand-100);
    color: var(--brand-500);
}

.article-page__title {
    font-size: clamp(2rem, 4.2vw, 3rem);
    font-weight: 800;
    line-height: 1.12;
    letter-spacing: -0.02em;
    color: var(--color-text);
    margin: 0 0 var(--sp-3);
}
.article-page__dek {
    font-size: clamp(1.05rem, 1.6vw, 1.25rem);
    line-height: 1.5;
    color: var(--color-text-muted);
    font-weight: var(--fw-normal);
    margin: 0 0 var(--sp-5);
    max-width: 64ch;
}

.article-page__meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px 10px;
    font-size: 14px;
    color: var(--color-text-muted);
    padding-block-start: var(--sp-3);
    border-block-start: 1px solid var(--color-border);
}
.article-page__author {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.article-page__avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--color-surface-2);
    display: inline-grid;
    place-items: center;
    flex-shrink: 0;
}
.article-page__avatar--fallback {
    background: var(--brand-500);
    color: var(--color-bg);
    font-weight: var(--fw-bold);
    font-size: 13px;
}
.article-page__meta-label { display: inline-flex; align-items: baseline; }
.article-page__author-link {
    color: var(--color-text);
    font-weight: var(--fw-semi);
    text-decoration: none;
}
a.article-page__author-link:hover { color: var(--brand-500); }

.article-page__meta-dot {
    color: var(--color-border-strong);
    user-select: none;
}
.article-page__meta-item {
    display: inline-flex;
    align-items: center;
    color: var(--color-text-muted);
}

/* Share row (now only used as bottom mirror on tablet/mobile + sticky dock). */
.article-page__share {
    display: flex;
    justify-content: center;
    gap: var(--sp-3);
}
.article-page__share--bottom {
    margin-top: var(--sp-10);
    padding-block-start: var(--sp-6);
    border-block-start: 1px solid var(--color-border);
}
@media (min-width: 1024px) {
    /* Desktop has the sticky vertical dock — bottom mirror is redundant. */
    .article-page__share--bottom { display: none; }
}
.article-page__share-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-surface-2);
    color: var(--color-text-muted);
    border: 0;
    display: inline-grid;
    place-items: center;
    text-decoration: none;
    cursor: pointer;
    transition: background-color var(--t-fast), color var(--t-fast);
    font-size: 14px;
}
.article-page__share-btn:hover,
.article-page__share-btn:focus-visible {
    background: var(--brand-500);
    color: var(--color-bg);
    outline: none;
}
.article-page__share-btn:focus-visible {
    box-shadow: 0 0 0 3px var(--brand-100);
}

@media (max-width: 767.98px) {
    .article-page__header {
        padding-block: var(--sp-5) var(--sp-4);
    }
    .article-page__dek { font-size: 16px; }
    .article-page__meta { font-size: 13px; }
}

/* ── Region C — Contained hero image ────────────────────── */
.article-page__cover {
    max-width: 1080px;
    margin: var(--sp-4) auto 0;
    padding-inline: var(--sp-4);
}
.article-page__cover-img {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    display: block;
    border-radius: 12px;
}

@media (max-width: 767.98px) {
    .article-page__cover {
        padding-inline: 0;
        margin-top: var(--sp-3);
    }
    .article-page__cover-img { border-radius: 0; }
}

/* ── Region D — Body + rails ────────────────────────────── */
.article-page__layout {
    max-width: 1080px;
    margin: var(--sp-10) auto 0;
    padding-inline: var(--sp-4);
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--sp-8);
}

.article-page__main { min-width: 0; }

.article-page__toc-jump {
    display: none;
    width: 100%;
    padding: 10px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--r-pill);
    background: var(--color-bg);
    color: var(--color-text);
    font-size: var(--text-sm);
    margin-bottom: var(--sp-5);
}
.article-page__toc-jump:not([hidden]) { display: block; }

.article-page__share-dock { display: none; }
.article-page__toc { display: none; }

@media (min-width: 1024px) {
    /* 12-column grid: 1 col share rail + 8 col body + 3 col TOC. */
    .article-page__layout {
        grid-template-columns: repeat(12, 1fr);
        gap: 48px;
    }
    .article-page__share-dock {
        grid-column: span 1;
        display: flex;
        flex-direction: column;
        gap: var(--sp-3);
        position: sticky;
        top: calc(64px + 32px);
        align-self: start;
        opacity: 0;
        transition: opacity 200ms ease-out;
        pointer-events: none;
    }
    .article-page__share-dock.is-visible {
        opacity: 1;
        pointer-events: auto;
    }
    .article-page__main {
        grid-column: span 8;
    }
    /* When TOC is hidden the body expands per spec (8 → 10 cols).
       The right rail collapses; the share dock keeps its 1-col left rail. */
    .article-page__layout--no-toc .article-page__main {
        grid-column: span 10;
    }
    .article-page__layout--no-toc .article-page__toc { display: none; }
    .article-page__toc {
        grid-column: span 3;
        display: block;
        position: sticky;
        top: calc(64px + 32px);
        align-self: start;
        max-height: calc(100vh - 64px - 64px);
        overflow-y: auto;
    }
    .article-page__toc[hidden] { display: none; }
}

.article-page__toc-title {
    font-size: 12px;
    font-weight: var(--fw-bold);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-text-subtle);
    margin: 0 0 var(--sp-3);
}
.article-page__toc ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.article-page__toc li a {
    display: block;
    padding: 6px 12px;
    font-size: 13px;
    line-height: 1.4;
    color: var(--color-text-muted);
    font-weight: var(--fw-medium);
    text-decoration: none;
    border-inline-start: 2px solid transparent;
    transition: color var(--t-fast), border-color var(--t-fast), background-color var(--t-fast);
}
.article-page__toc li.is-h3 a { padding-inline-start: 24px; font-size: 12px; }
.article-page__toc li a:hover { color: var(--color-text); }
.article-page__toc li.is-active a {
    color: var(--color-text);
    font-weight: var(--fw-bold);
    border-inline-start-color: var(--brand-300);
}

/* ── Article body typography ─────────────────────────── */
.article-body {
    max-width: 720px;
    margin-inline: auto;
    color: var(--color-text);
    font-size: 18px;
    line-height: 1.7;
    font-weight: var(--fw-normal);
}
.article-body p { margin: 0 0 24px; }
.article-body h2 {
    font-size: 28px;
    font-weight: var(--fw-bold);
    color: var(--color-text);
    margin: 56px 0 16px;
    line-height: 1.25;
    scroll-margin-top: calc(64px + 16px);
}
.article-body h3 {
    font-size: 22px;
    font-weight: var(--fw-bold);
    color: var(--color-text);
    margin: 40px 0 12px;
    line-height: 1.3;
    scroll-margin-top: calc(64px + 16px);
}
.article-body h4 {
    font-size: 18px;
    font-weight: var(--fw-bold);
    color: var(--color-text);
    margin: 32px 0 12px;
}

.article-body a {
    color: var(--brand-500);
    text-decoration: underline;
    text-underline-offset: 0.15em;
    text-decoration-color: var(--brand-300);
    transition: text-decoration-color var(--t-fast);
}
.article-body a:hover { text-decoration-color: var(--brand-500); }

.article-body code {
    background: var(--color-surface-2);
    color: var(--color-text);
    font-size: 0.92em;
    padding: 2px 6px;
    border-radius: 6px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.article-body pre {
    background: var(--color-surface-2);
    padding: 16px 20px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 24px 0;
}
.article-body pre code {
    background: transparent;
    padding: 0;
    border-radius: 0;
    font-size: 0.92em;
}

.article-body blockquote {
    margin: 32px 0;
    padding: 16px 24px;
    border-inline-start: 3px solid var(--brand-500);
    color: var(--color-text);
    font-style: italic;
    font-size: 20px;
    line-height: 1.5;
    background: transparent;
}
.article-body blockquote.pullquote {
    position: relative;
    border: 0;
    margin: 56px 0;
    padding: 32px 24px 24px;
    font-style: normal;
    font-size: 28px;
    font-weight: var(--fw-semi);
    line-height: 1.4;
    text-align: center;
    color: var(--color-text);
}
.article-body blockquote.pullquote::before {
    content: "“";
    position: absolute;
    inset-block-start: -8px;
    inset-inline-start: 12px;
    font-size: 96px;
    line-height: 1;
    color: var(--brand-100);
    font-family: Georgia, "Times New Roman", serif;
    z-index: 0;
    pointer-events: none;
}
[dir="rtl"] .article-body blockquote.pullquote::before {
    content: "”";
    inset-inline-start: auto;
    inset-inline-end: 12px;
}

.article-body img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    margin: 32px auto;
    display: block;
}
.article-body figure {
    margin: 32px 0;
}
.article-body figcaption {
    font-size: 13px;
    color: var(--color-text-subtle);
    font-style: italic;
    text-align: center;
    margin-top: 8px;
}

.article-body ul,
.article-body ol {
    margin: 0 0 24px;
    padding-inline-start: 24px;
}
.article-body ul li,
.article-body ol li {
    margin-bottom: 24px;
    line-height: 1.7;
}
.article-body ul li::marker { color: var(--brand-500); }
.article-body ol li::marker { color: var(--brand-500); font-weight: var(--fw-bold); }

.article-body hr {
    border: 0;
    border-top: 1px solid var(--color-border);
    margin: 48px 0;
}

@media (max-width: 767.98px) {
    .article-body { font-size: 17px; }
    .article-body h2 { font-size: 24px; margin-top: 40px; }
    .article-body h3 { font-size: 20px; margin-top: 32px; }
    .article-body blockquote.pullquote { font-size: 22px; padding: 24px 16px 16px; }
}

/* ── Region E — Footer regions ───────────────────────── */
.article-page__footer {
    max-width: 720px;
    margin: var(--sp-16) auto 0;
    padding-inline: var(--sp-4);
}
.article-page__tags-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--sp-2);
    margin-bottom: var(--sp-10);
}
.article-page__tags-label {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-inline-end: var(--sp-2);
}

/* Author card */
.article-page__author-card {
    background: var(--color-surface);
    border-radius: 16px;
    padding: 32px;
    margin: var(--sp-16) auto;
    display: flex;
    gap: var(--sp-5);
    align-items: flex-start;
}
.article-page__author-card-avatar {
    flex: 0 0 72px;
    width: 72px;
    height: 72px;
    border-radius: 50%;
    overflow: hidden;
    display: inline-grid;
    place-items: center;
    background: var(--brand-500);
    color: var(--color-bg);
}
.article-page__author-card-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.article-page__author-card-initial {
    font-size: 28px;
    font-weight: var(--fw-bold);
}
.article-page__author-card-body { min-width: 0; flex: 1 1 auto; }
.article-page__author-card-name {
    font-size: 18px;
    font-weight: var(--fw-bold);
    color: var(--color-text);
    margin: 0 0 4px;
}
.article-page__author-card-role {
    font-size: 14px;
    color: var(--color-text-muted);
    margin: 0 0 var(--sp-2);
}
.article-page__author-card-bio {
    font-size: 15px;
    color: var(--color-text-muted);
    line-height: 1.55;
    margin: 0 0 var(--sp-3);
}
.article-page__author-card-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--brand-500);
    font-weight: var(--fw-semi);
    text-decoration: none;
}
.article-page__author-card-more:hover { color: var(--brand-700); }

@media (max-width: 575.98px) {
    .article-page__author-card { flex-direction: column; padding: 24px; }
}

/* Newsletter CTA */
.article-page__newsletter {
    background: var(--brand-gradient);
    color: var(--color-bg);
    border-radius: 20px;
    padding: 48px;
    margin: var(--sp-16) auto;
    text-align: center;
}
.article-page__newsletter-title {
    font-size: 28px;
    font-weight: var(--fw-bold);
    line-height: 1.25;
    color: var(--color-bg);
    margin: 0 0 var(--sp-3);
}
.article-page__newsletter-sub {
    color: rgba(255, 255, 255, 0.85);
    font-size: 16px;
    line-height: 1.5;
    margin: 0 0 var(--sp-6);
}
.article-page__newsletter-form {
    display: flex;
    gap: var(--sp-3);
    max-width: 480px;
    margin: 0 auto var(--sp-3);
}
.article-page__newsletter-input {
    flex: 1 1 auto;
    min-width: 0;
    height: 48px;
    padding: 10px 20px;
    border: 0;
    border-radius: var(--r-pill);
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 15px;
    outline: none;
}
.article-page__newsletter-input:focus {
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.45);
}
.article-page__newsletter-btn {
    height: 48px;
    padding: 0 28px;
    border: 0;
    border-radius: var(--r-pill);
    background: var(--color-bg);
    color: var(--brand-500);
    font-weight: var(--fw-bold);
    font-size: 15px;
    cursor: pointer;
    transition: transform var(--t-fast), background-color var(--t-fast);
}
.article-page__newsletter-btn:hover { transform: translateY(-1px); background: var(--color-surface); }
.article-page__newsletter-btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.5);
}
.article-page__newsletter-note {
    color: rgba(255, 255, 255, 0.7);
    font-size: 13px;
    margin: 0;
}
.article-page__newsletter-status {
    margin-top: var(--sp-3);
    font-size: 14px;
    color: var(--color-bg);
    min-height: 1.2em;
}

@media (max-width: 575.98px) {
    .article-page__newsletter { padding: 32px 24px; }
    .article-page__newsletter-form { flex-direction: column; }
    .article-page__newsletter-title { font-size: 22px; }
}

/* ── Related-articles section (cards untouched) ─────── */
.article-related {
    background: var(--color-surface);
    padding-block: var(--sp-24);
    margin-top: var(--sp-16);
}
.article-related__eyebrow {
    text-align: center;
    font-size: 12px;
    font-weight: var(--fw-bold);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--brand-500);
    margin: 0 0 var(--sp-3);
}
.article-related__title {
    text-align: center;
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    font-weight: var(--fw-black);
    color: var(--color-text);
    letter-spacing: -0.01em;
    margin: 0 0 var(--sp-10);
}

@media (max-width: 767.98px) {
    .article-related { padding-block: var(--sp-12); }
}

/* ── Back-to-top button ─────────────────────────────── */
.article-back-to-top {
    position: fixed;
    inset-block-end: 24px;
    inset-inline-end: 24px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 0;
    background: var(--brand-500);
    color: var(--color-bg);
    display: inline-grid;
    place-items: center;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: translateY(8px);
    transition: opacity var(--t-base), transform var(--t-base), background-color var(--t-fast);
    z-index: 50;
}
.article-back-to-top[hidden] { display: none; }
.article-back-to-top.is-visible {
    opacity: 1;
    transform: translateY(0);
}
.article-back-to-top:hover { background: var(--brand-700); }
.article-back-to-top:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px var(--brand-100), var(--shadow-lg);
}

/* ── Copy-link toast ───────────────────────────────── */
.article-toast {
    position: fixed;
    inset-block-end: 24px;
    inset-inline-start: 50%;
    transform: translateX(-50%) translateY(12px);
    background: var(--color-text);
    color: var(--color-bg);
    padding: 12px 20px;
    border-radius: var(--r-pill);
    font-size: 14px;
    font-weight: var(--fw-semi);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    opacity: 0;
    transition: opacity var(--t-base), transform var(--t-base);
    z-index: 1100;
    pointer-events: none;
    box-shadow: var(--shadow);
}
[dir="rtl"] .article-toast { transform: translateX(50%) translateY(12px); }
.article-toast[hidden] { display: none; }
.article-toast.is-visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}
[dir="rtl"] .article-toast.is-visible { transform: translateX(50%) translateY(0); }

/* ── Reduced motion ────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    .article-page__share-dock,
    .article-back-to-top,
    .article-toast { transition: none; }
    .article-progress { transition: none; }
    html { scroll-behavior: auto; }
}

/* ── Focus-visible defaults ────────────────────────── */
.article-page__chip:focus-visible,
.article-page__author-link:focus-visible,
.article-page__crumbs a:focus-visible,
.article-body a:focus-visible {
    outline: 2px solid var(--brand-300);
    outline-offset: 2px;
    border-radius: 4px;
}
.article-page__newsletter-input:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.5);
}