/* ============================================================
   GEMS Article ("Chi tiết bài viết") — styles
   Trang đọc bài dạng tạp chí biên tập, bám hệ GEMS.
   ============================================================ */
const ArticleStyles = () => (
  <style>{`
    .art-page { background: var(--paper); color: var(--ink); min-height: 100vh; }

    /* ============ HERO / HEADER ============ */
    .art-page .art-hero { padding: 168px 0 0; }
    .art-page .art-crumb {
      display: inline-flex; align-items: center; gap: 12px;
      font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.18em;
      text-transform: uppercase; font-weight: 600; color: var(--ink-60);
      margin-bottom: 40px;
    }
    .art-page .art-crumb a { color: var(--ink-60); transition: color var(--t-fast) var(--ease); }
    .art-page .art-crumb a:hover { color: var(--gems-red); }
    .art-page .art-crumb .sep { color: var(--ink-20); }
    .art-page .art-crumb .here { color: var(--gems-red); }

    .art-page .art-cat {
      font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.22em;
      text-transform: uppercase; font-weight: 700; color: var(--gems-red);
      display: inline-flex; align-items: center; gap: 14px; margin-bottom: 22px;
    }
    .art-page .art-cat::before { content: ""; width: 28px; height: 2px; background: var(--gems-red); }

    .art-page .art-head-grid {
      display: grid; grid-template-columns: minmax(0, 1fr); gap: 0;
    }
    /* split = title beside image */
    .art-page.hero-split .art-head-grid {
      grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: end;
    }

    .art-page .art-title {
      font-family: var(--font-display);
      font-size: clamp(40px, 5.4vw, 80px); line-height: 1.02; letter-spacing: -0.025em;
      font-weight: 600; margin: 0; color: var(--ink); text-wrap: balance; max-width: 18ch;
    }
    .art-page .art-title .dot { color: var(--gems-red); }
    .art-page .art-dek {
      font-family: var(--font-display); font-size: clamp(19px, 1.7vw, 24px);
      line-height: 1.5; color: var(--ink-60); margin: 28px 0 0; max-width: 60ch;
      text-wrap: pretty;
    }
    body.serif-mode .art-page .art-dek { font-style: italic; }

    /* Byline row */
    .art-page .art-byline {
      display: flex; align-items: center; gap: 28px; flex-wrap: wrap;
      margin-top: 44px; padding: 22px 0; border-top: 1px solid var(--ink);
      border-bottom: 1px solid var(--rule);
    }
    .art-page .by-author { display: flex; align-items: center; gap: 14px; }
    .art-page .by-avatar {
      width: 46px; height: 46px; border-radius: 999px; object-fit: cover;
      background: var(--paper-2); flex-shrink: 0;
    }
    .art-page .by-name {
      font-family: var(--font-display-sans); font-size: 15px; font-weight: 700;
      letter-spacing: -0.01em; color: var(--ink); line-height: 1.3;
    }
    .art-page .by-role {
      font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em;
      text-transform: uppercase; color: var(--ink-60); margin-top: 2px;
    }
    .art-page .by-meta {
      margin-left: auto; display: flex; align-items: center; gap: 22px;
      font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em;
      text-transform: uppercase; color: var(--ink-60);
    }
    .art-page .by-meta .dotsep { width: 4px; height: 4px; border-radius: 999px; background: var(--ink-20); }

    /* Hero image */
    .art-page .art-hero-img {
      position: relative; overflow: hidden; background: var(--gems-black);
      margin-top: 48px; aspect-ratio: 16 / 8;
    }
    .art-page.hero-split .art-hero-img { margin-top: 0; aspect-ratio: 4 / 5; }
    .art-page .art-hero-img img {
      position: absolute; inset: 0; width: 100%; height: 100%;
      object-fit: cover; transition: transform 1.2s var(--ease);
    }
    .art-page .art-figcap {
      display: flex; gap: 14px; align-items: baseline; margin-top: 14px;
      font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.08em;
      text-transform: uppercase; color: var(--ink-60);
    }
    .art-page .art-figcap .src { color: var(--gems-red); }

    /* ============ BODY LAYOUT ============ */
    .art-page .art-layout {
      display: grid;
      grid-template-columns: 200px minmax(0, 700px) 1fr;
      gap: 56px; padding: 76px 0 0; align-items: start;
    }
    /* centered (no rail) */
    .art-page.body-centered .art-layout {
      grid-template-columns: 1fr minmax(0, 720px) 1fr;
    }
    .art-page.body-centered .art-rail { display: none; }

    /* Sticky rail */
    .art-page .art-rail { position: sticky; top: 110px; display: flex; flex-direction: column; gap: 40px; }
    .art-page .rail-label {
      font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.2em;
      text-transform: uppercase; font-weight: 600; color: var(--ink-60);
      margin-bottom: 16px; display: flex; align-items: center; gap: 10px;
    }
    .art-page .rail-label::before { content: ""; width: 16px; height: 2px; background: var(--gems-red); }

    /* TOC */
    .art-page .art-toc { display: flex; flex-direction: column; }
    .art-page .toc-link {
      font-size: 13px; line-height: 1.4; color: var(--ink-60); padding: 9px 0 9px 16px;
      border-left: 2px solid var(--rule); transition: all var(--t-fast) var(--ease);
    }
    .art-page .toc-link:hover { color: var(--ink); }
    .art-page .toc-link.active { color: var(--ink); border-left-color: var(--gems-red); font-weight: 600; }

    /* Share */
    .art-page .art-share { display: flex; flex-direction: column; gap: 8px; }
    .art-page .share-btn {
      display: flex; align-items: center; justify-content: space-between; gap: 10px;
      font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.12em;
      text-transform: uppercase; font-weight: 600; color: var(--ink-60);
      padding: 11px 14px; border: 1px solid var(--ink-20);
      transition: all var(--t-fast) var(--ease); cursor: pointer; background: transparent; text-align: left;
    }
    .art-page .share-btn:hover { border-color: var(--ink); color: var(--ink); }
    .art-page .share-btn .ar { opacity: 0.5; }

    /* ============ PROSE ============ */
    .art-page .art-prose { font-size: 18.5px; line-height: 1.8; color: rgba(14,25,31,0.88); }
    .art-page .art-prose > p { margin: 0 0 1.5em; text-wrap: pretty; }
    .art-page .art-prose .lead-p { font-size: 21px; line-height: 1.62; color: var(--ink); }
    .art-page.has-dropcap .art-prose .lead-p::first-letter {
      font-family: var(--font-display); font-weight: 600;
      float: left; font-size: 4.6em; line-height: 0.82; padding: 6px 14px 0 0;
      color: var(--gems-red);
    }
    .art-page .art-prose a {
      color: var(--ink); border-bottom: 1px solid var(--gems-red); padding-bottom: 1px;
      transition: color var(--t-fast) var(--ease);
    }
    .art-page .art-prose a:hover { color: var(--gems-red); }
    .art-page .art-prose strong { font-weight: 700; color: var(--ink); }
    .art-page .art-prose em { font-style: italic; }

    .art-page .art-prose h2 {
      font-family: var(--font-display-sans);
      font-size: clamp(25px, 2.4vw, 33px); line-height: 1.18; letter-spacing: -0.018em;
      font-weight: 700; color: var(--ink); margin: 1.9em 0 0.55em; scroll-margin-top: 110px;
      text-wrap: balance;
    }
    .art-page .art-prose h2 .h2-num {
      font-family: var(--font-mono); font-size: 12px; font-weight: 600; letter-spacing: 0.16em;
      color: var(--gems-red); display: block; margin-bottom: 12px;
    }

    /* Pull quote */
    .art-page .art-pull {
      margin: 2.4em 0; padding: 8px 0 8px 32px; border-left: 3px solid var(--gems-red);
    }
    .art-page .art-pull p {
      font-family: var(--font-display); font-size: clamp(24px, 2.6vw, 34px);
      line-height: 1.28; letter-spacing: -0.02em; font-weight: 600; color: var(--ink);
      margin: 0; text-wrap: balance;
    }
    body.serif-mode .art-page .art-pull p { font-style: italic; font-weight: 500; }
    .art-page .art-pull cite {
      display: block; margin-top: 18px; font-style: normal;
      font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em;
      text-transform: uppercase; color: var(--ink-60);
    }

    /* Stat block */
    .art-page .art-stats {
      display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
      background: var(--rule); border: 1px solid var(--rule);
      margin: 2.6em 0; }
    .art-page .stat-cell { background: var(--paper); padding: 30px 26px; }
    .art-page .stat-num {
      font-family: var(--font-display); font-size: clamp(40px, 4vw, 54px);
      line-height: 1; font-weight: 600; color: var(--gems-blue); letter-spacing: -0.02em;
    }
    .art-page .stat-lbl {
      font-size: 13.5px; line-height: 1.5; color: var(--ink-60); margin-top: 14px;
    }
    .art-page .art-stats-note {
      font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em;
      text-transform: uppercase; color: var(--ink-60); margin: -1.8em 0 2.6em;
    }

    /* In-body figure */
    .art-page .art-fig { margin: 2.6em 0; }
    .art-page .art-fig .ph {
      position: relative; overflow: hidden; aspect-ratio: 3 / 2; background: var(--gems-black);
    }
    .art-page .art-fig .ph img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
    .art-page .art-fig figcaption {
      display: flex; gap: 14px; align-items: baseline; margin-top: 12px;
      font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.08em;
      text-transform: uppercase; color: var(--ink-60);
    }
    .art-page .art-fig figcaption .src { color: var(--gems-red); }

    /* Block Editor delimiter (Editor.js "delimiter" → centered rule) */
    .art-page .art-prose hr.art-delim {
      border: 0; height: 0; margin: 2.4em auto; width: 64px;
      border-top: 2px solid var(--gems-red);
    }

    /* Section rule with mark */
    .art-page .art-mark {
      display: flex; align-items: center; gap: 14px; margin: 2.6em 0;
      color: var(--ink-20);
    }
    .art-page .art-mark::before, .art-page .art-mark::after {
      content: ""; height: 1px; background: var(--rule); flex: 1;
    }
    .art-page .art-mark span { font-family: var(--font-display); color: var(--gems-red); font-size: 18px; }

    /* End mark */
    .art-page .art-end {
      margin: 2.2em 0 0; font-family: var(--font-mono); font-size: 11px;
      letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-60);
      display: flex; align-items: center; gap: 12px;
    }
    .art-page .art-end::before { content: ""; width: 24px; height: 2px; background: var(--gems-red); }

    /* Tag row */
    .art-page .art-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 40px; }
    .art-page .art-tags a {
      font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em;
      text-transform: uppercase; padding: 7px 12px; border: 1px solid var(--ink-20);
      color: var(--ink-60); transition: all var(--t-fast) var(--ease);
    }
    .art-page .art-tags a:hover { border-color: var(--gems-red); color: var(--gems-red); }

    /* ============ AUTHOR CARD ============ */
    .art-page .author-card {
      margin-top: 64px; padding: 40px; background: var(--paper-2);
      border-top: 2px solid var(--gems-red);
      display: grid; grid-template-columns: 84px 1fr; gap: 28px; align-items: start;
    }
    .art-page .author-card .ac-avatar {
      width: 84px; height: 84px; border-radius: 999px; object-fit: cover; background: var(--paper);
    }
    .art-page .author-card .ac-role {
      font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.18em;
      text-transform: uppercase; font-weight: 600; color: var(--gems-red); margin-bottom: 8px;
    }
    .art-page .author-card .ac-name {
      font-family: var(--font-display-sans); font-size: 22px; font-weight: 700;
      letter-spacing: -0.015em; color: var(--ink); margin: 0 0 12px;
    }
    .art-page .author-card .ac-bio { font-size: 14.5px; line-height: 1.7; color: var(--ink-60); margin: 0; max-width: 60ch; }

    /* ============ RELATED ============ */
    .art-page .related { padding: 100px 0 0; }
    .art-page .rel-head {
      display: flex; justify-content: space-between; align-items: baseline;
      padding-bottom: 18px; border-bottom: 1px solid var(--ink); margin-bottom: 44px;
    }
    .art-page .rel-head h3 {
      font-family: var(--font-display); font-size: clamp(26px, 2.6vw, 40px);
      font-weight: 600; letter-spacing: -0.02em; margin: 0; color: var(--ink);
    }
    .art-page .rel-head h3 .dot { color: var(--gems-red); }
    .art-page .rel-all {
      font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em;
      text-transform: uppercase; font-weight: 600; color: var(--ink-60);
      display: inline-flex; align-items: center; gap: 8px; white-space: nowrap;
    }
    .art-page .rel-all:hover { color: var(--gems-red); }
    .art-page .rel-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
    .art-page .rel-card { display: flex; flex-direction: column; background: var(--paper-2); border-top: 2px solid var(--gems-blue);
      transition: transform var(--t-med) var(--ease), border-color var(--t-med) var(--ease), box-shadow var(--t-med) var(--ease); }
    .art-page .rel-card:hover { transform: translateY(-4px); border-top-color: var(--gems-red); box-shadow: 0 24px 48px rgba(14,25,31,0.08); }
    .art-page .rel-img { height: 186px; overflow: hidden; position: relative; }
    .art-page .rel-img img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform 800ms var(--ease); }
    .art-page .rel-card:hover .rel-img img { transform: scale(1.05); }
    .art-page .rel-body { padding: 24px 22px 28px; display: flex; flex-direction: column; flex: 1; }
    .art-page .rel-meta { display: flex; gap: 12px; align-items: baseline; margin-bottom: 12px; }
    .art-page .rel-cat { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.2em; text-transform: uppercase; font-weight: 700; color: var(--gems-red); }
    .art-page .rel-when { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-60); }
    .art-page .rel-title { font-family: var(--font-display-sans); font-size: 18px; font-weight: 700; letter-spacing: -0.01em; line-height: 1.3; margin: 0; color: var(--ink); }
    .art-page .rel-card:hover .rel-title { color: var(--gems-red); transition: color var(--t-fast) var(--ease); }

    /* ============ NEWSLETTER ============ */
    .art-page .art-news { background: var(--gems-blue); color: white; padding: 84px 0; margin-top: 104px; position: relative; overflow: hidden; }
    .art-page .art-news-bg { position: absolute; inset: 0; opacity: 0.16; }
    .art-page .art-news-bg img { width: 100%; height: 100%; object-fit: cover; }
    .art-page .art-news .container { position: relative; z-index: 2; }
    .art-page .art-news-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 56px; align-items: center; }
    .art-page .art-news-label { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.24em; text-transform: uppercase; font-weight: 600; color: rgba(255,255,255,0.7); display: inline-flex; align-items: center; gap: 12px; margin-bottom: 20px; }
    .art-page .art-news-label::before { content: ""; width: 24px; height: 2px; background: var(--gems-red); }
    .art-page .art-news h3 { font-family: var(--font-display); font-size: clamp(26px, 2.6vw, 38px); line-height: 1.15; letter-spacing: -0.018em; font-weight: 600; margin: 0 0 14px; color: white; text-wrap: balance; }
    .art-page .art-news p { font-size: 15px; line-height: 1.7; color: rgba(255,255,255,0.78); margin: 0; max-width: 52ch; }
    .art-page .art-news-form { display: flex; gap: 0; }
    .art-page .art-news-form input { flex: 1; font: inherit; font-size: 14px; background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.3); border-right: 0; padding: 16px 18px; color: white; outline: none; }
    .art-page .art-news-form input::placeholder { color: rgba(255,255,255,0.45); }
    .art-page .art-news-form input:focus { border-color: rgba(255,255,255,0.7); }
    .art-page .art-news-form button { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; font-weight: 600; background: var(--gems-red); color: white; padding: 16px 26px; transition: background var(--t-fast) var(--ease); white-space: nowrap; }
    .art-page .art-news-form button:hover { background: var(--gems-black); }
    .art-page .art-news-note { margin-top: 12px; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: rgba(255,255,255,0.62); }
    .art-page .art-news .verify-badge { background: rgba(255,243,214,0.92); }

    /* ============ RESPONSIVE ============ */
    @media (max-width: 1024px) {
      .art-page .art-hero { padding-top: 128px; }
      .art-page.hero-split .art-head-grid { grid-template-columns: 1fr; gap: 32px; }
      .art-page.hero-split .art-hero-img { aspect-ratio: 16 / 9; margin-top: 8px; }
      .art-page .art-layout, .art-page.body-centered .art-layout { grid-template-columns: 1fr; gap: 0; }
      .art-page .art-rail { position: static; flex-direction: row; flex-wrap: wrap; gap: 32px; margin-bottom: 44px; padding-bottom: 36px; border-bottom: 1px solid var(--rule); }
      .art-page .art-toc { display: none; }
      .art-page .art-share { flex-direction: row; }
      .art-page .rel-grid { grid-template-columns: repeat(2, 1fr); }
      .art-page .art-stats { grid-template-columns: 1fr; }
      .art-page .art-news-grid { grid-template-columns: 1fr; gap: 32px; }
    }
    @media (max-width: 640px) {
      .art-page .art-byline { gap: 16px; }
      .art-page .by-meta { margin-left: 0; width: 100%; }
      .art-page .art-prose { font-size: 17px; }
      .art-page .author-card { grid-template-columns: 1fr; gap: 18px; padding: 28px; }
      .art-page .rel-grid { grid-template-columns: 1fr; }
      .art-page .art-news-form { flex-direction: column; }
      .art-page .art-news-form input { border-right: 1px solid rgba(255,255,255,0.3); }
      .art-page.has-dropcap .art-prose .lead-p::first-letter { font-size: 3.6em; }
    }
  `}</style>
);

window.ArticleStyles = ArticleStyles;