*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: system-ui, -apple-system, sans-serif;
      background: #f5f5f0;
      color: #1a1a1a;
      line-height: 1.7;
      overflow-x: hidden;
    }
    img { max-width: 100%; display: block; }
    a { text-decoration: none; color: inherit; }

    /* Header */
    .header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(245,245,240,0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid #e2e8f0;
      transition: box-shadow 0.3s;
    }
    .header.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,0.06); }
    .header-inner {
      max-width: 760px;
      margin: 0 auto;
      padding: 14px 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .logo {
      font-family: 'Courier New', monospace;
      font-size: 22px;
      font-weight: 900;
      color: #1a1a1a;
      letter-spacing: -1.5px;
      text-transform: uppercase;
    }
    .logo span { color: #0ea5e9; }
    .nav { display: flex; gap: 24px; align-items: center; }
    .nav a { font-size: 0.85rem; font-weight: 600; color: #555; transition: color 0.2s; }
    .nav a:hover { color: #0ea5e9; }
    .nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
    .nav-toggle svg { width: 24px; height: 24px; color: #1a1a1a; }

    @media (max-width: 640px) {
      .nav {
        position: fixed;
        top: 0; right: 0;
        width: 260px; height: 100vh;
        background: #fff;
        flex-direction: column;
        padding: 72px 28px 28px;
        gap: 20px;
        box-shadow: -4px 0 30px rgba(0,0,0,0.1);
        transform: translateX(100%);
        transition: transform 0.3s ease;
        z-index: 200;
      }
      .nav.open { transform: translateX(0); }
      .nav a { font-size: 1rem; }
      .nav-toggle { display: block; z-index: 300; }
      .nav-overlay {
        position: fixed; inset: 0;
        background: rgba(0,0,0,0.3);
        z-index: 150;
        opacity: 0; pointer-events: none;
        transition: opacity 0.3s;
      }
      .nav-overlay.open { opacity: 1; pointer-events: all; }
    }

    /* Breadcrumb */
    .breadcrumb {
      max-width: 760px;
      margin: 0 auto;
      padding: 20px 20px 0;
      font-size: 0.8rem;
      color: #888;
    }
    .breadcrumb a { color: #0ea5e9; }
    .breadcrumb a:hover { text-decoration: underline; }

    /* Article */
    .article {
      max-width: 760px;
      margin: 0 auto;
      padding: 40px 20px 80px;
    }
    .article__badge {
      display: inline-block;
      background: rgba(14,165,233,0.1);
      color: #0ea5e9;
      padding: 4px 14px;
      border-radius: 4px;
      font-size: 0.75rem;
      font-weight: 700;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      margin-bottom: 16px;
    }
    .article__title {
      font-size: clamp(1.8rem, 5vw, 2.6rem);
      font-weight: 900;
      letter-spacing: -1.5px;
      line-height: 1.15;
      margin-bottom: 16px;
      color: #1a1a1a;
    }
    .article__meta {
      font-size: 0.85rem;
      color: #888;
      margin-bottom: 40px;
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .article__meta span { display: flex; align-items: center; gap: 4px; }

    /* TOC */
    .toc {
      background: #fff;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      padding: 24px 28px;
      margin-bottom: 40px;
    }
    .toc__title {
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: #0ea5e9;
      margin-bottom: 12px;
    }
    .toc ol {
      list-style: none;
      counter-reset: toc;
      padding: 0;
    }
    .toc li {
      counter-increment: toc;
      padding: 6px 0;
      border-bottom: 1px solid #f0f0f0;
    }
    .toc li:last-child { border-bottom: none; }
    .toc li::before {
      content: counter(toc, decimal-leading-zero) ".";
      color: #0ea5e9;
      font-weight: 700;
      font-size: 0.8rem;
      margin-right: 8px;
    }
    .toc a {
      font-size: 0.92rem;
      color: #444;
      font-weight: 500;
      transition: color 0.2s;
    }
    .toc a:hover { color: #0ea5e9; }

    /* Content */
    .article h2 {
      font-size: 1.5rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      margin: 48px 0 16px;
      padding-top: 16px;
      color: #1a1a1a;
    }
    .content h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin: 32px 0 12px;
      color: #333;
    }
    .article p {
      margin-bottom: 16px;
      color: #444;
      font-size: 1.02rem;
      line-height: 1.75;
    }
    .article ul, .article ol {
      margin: 0 0 20px 20px;
      color: #444;
    }
    .article li {
      margin-bottom: 8px;
      line-height: 1.65;
    }
    .content strong { color: #1a1a1a; }
    .article a { color: #0ea5e9; font-weight: 600; border-bottom: 1px solid rgba(14,165,233,0.3); }
    .article a:hover { border-bottom-color: #0ea5e9; }

    /* Code blocks */
    .article pre {
      background: #111;
      color: #e2e8f0;
      border-radius: 8px;
      padding: 20px 24px;
      overflow-x: auto;
      margin: 0 0 24px;
      font-family: 'Courier New', monospace;
      font-size: 0.88rem;
      line-height: 1.65;
      border: 1px solid #2a2a2a;
    }
    .article code {
      font-family: 'Courier New', monospace;
      font-size: 0.88em;
      background: rgba(14,165,233,0.08);
      color: #0ea5e9;
      padding: 2px 6px;
      border-radius: 4px;
    }
    .article pre code {
      background: none;
      color: inherit;
      padding: 0;
      border-radius: 0;
    }

    /* Terminal block */
    .terminal {
      background: #0a0a0a;
      border: 1px solid #2a2a2a;
      border-radius: 10px;
      overflow: hidden;
      margin: 0 0 24px;
    }
    .terminal__bar {
      background: #1a1a1a;
      padding: 10px 16px;
      display: flex;
      gap: 6px;
      align-items: center;
    }
    .terminal__dot {
      width: 10px; height: 10px;
      border-radius: 50%;
    }
    .terminal__dot--red { background: #ff5f57; }
    .terminal__dot--yellow { background: #ffbd2e; }
    .terminal__dot--green { background: #28c840; }
    .terminal__label {
      font-family: 'Courier New', monospace;
      font-size: 0.72rem;
      color: #666;
      margin-left: 8px;
    }
    .terminal__body {
      padding: 20px 24px;
      font-family: 'Courier New', monospace;
      font-size: 0.85rem;
      line-height: 1.7;
      color: #ccc;
    }
    .terminal__body .prompt { color: #0ea5e9; }
    .terminal__body .comment { color: #555; }
    .terminal__body .string { color: #a5d6a7; }
    .terminal__body .keyword { color: #ffb74d; }
    .terminal__body .dim { color: #666; }

    /* CTA Box */
    .cta-box {
      background: linear-gradient(135deg, #0c4a6e 0%, #0369a1 100%);
      border-radius: 12px;
      padding: 40px 32px;
      text-align: center;
      margin: 48px 0;
      color: #fff;
    }
    .cta-box h3 {
      font-size: 1.4rem;
      font-weight: 800;
      margin-bottom: 12px;
      color: #fff;
    }
    .cta-box p {
      font-size: 0.95rem;
      color: rgba(255,255,255,0.8);
      margin-bottom: 24px;
      max-width: 500px;
      margin-left: auto;
      margin-right: auto;
    }
    .cta-box .btn { display: inline-block; }
    .cta-box .btn + .btn { margin-left: 12px; }

    .btn {
      display: inline-block;
      padding: 14px 28px;
      border-radius: 8px;
      font-size: 0.92rem;
      font-weight: 700;
      cursor: pointer;
      border: none;
      transition: transform 0.15s, box-shadow 0.15s;
      text-align: center;
    }
    .btn--primary {
      background: #0ea5e9;
      color: #fff;
      box-shadow: 0 4px 16px rgba(14,165,233,0.3);
    }
    .btn--primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(14,165,233,0.4);
    }
    .btn--white {
      background: #fff;
      color: #0c4a6e;
    }
    .btn--white:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(255,255,255,0.2);
    }

    /* Info box */
    .info-box {
      background: rgba(14,165,233,0.06);
      border-left: 4px solid #0ea5e9;
      border-radius: 0 8px 8px 0;
      padding: 20px 24px;
      margin: 24px 0;
    }
    .info-box p { color: #555; margin-bottom: 0; }
    .info-box strong { color: #0c4a6e; }

    /* Table */
    .article table {
      width: 100%;
      border-collapse: collapse;
      margin: 0 0 24px;
      font-size: 0.9rem;
    }
    .content th, .content td {
      text-align: left;
      padding: 12px 16px;
      border-bottom: 1px solid #e2e8f0;
    }
    .content th {
      background: #fff;
      font-weight: 700;
      color: #1a1a1a;
      font-size: 0.82rem;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .content td { color: #555; }
    .content tr:hover td { background: rgba(14,165,233,0.03); }

    /* FAQ */
    .faq { margin: 48px 0 0; }
    .faq__item { border-bottom: 1px solid #e2e8f0; }
    .faq__q {
      width: 100%;
      background: none;
      border: none;
      color: #1a1a1a;
      font-size: 1rem;
      font-weight: 600;
      padding: 20px 0;
      text-align: left;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      font-family: inherit;
    }
    .faq__icon {
      font-size: 1.3rem;
      color: #0ea5e9;
      transition: transform 0.2s;
      flex-shrink: 0;
    }
    .faq__q.active .faq__icon { transform: rotate(45deg); }
    .faq__a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
    .faq__a p { padding: 0 0 20px; color: #666; font-size: 0.95rem; }

    /* Footer */
    .footer {
      background: #1a1a1a;
      color: #888;
      padding: 40px 20px;
      text-align: center;
      font-size: 0.82rem;
    }
    .footer a { color: #0ea5e9; }

    @media (max-width: 640px) {
      .article { padding: 24px 16px 60px; }
      .cta-box { padding: 28px 20px; }
      .cta-box .btn { display: block; width: 100%; }
      .cta-box .btn + .btn { margin-left: 0; margin-top: 10px; }
      .article pre { padding: 16px; font-size: 0.8rem; }
    }
  
    .share-bar { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; padding: 24px 0; margin: 32px 0; border-top: 1px solid #e2e8f0; border-bottom: 1px solid #e2e8f0; }
    .share-bar__title { width: 100%; text-align: center; font-size: 13px; color: #888; margin-bottom: 4px; text-transform: uppercase; letter-spacing: 1px; }
    .share-btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: 8px; font-size: 13px; font-weight: 600; text-decoration: none; color: #fff; transition: opacity 0.2s; }
    .share-btn:hover { opacity: 0.85; }
    .share-btn--x { background: #000; }
    .share-btn--linkedin { background: #0a66c2; }
    .share-btn--facebook { background: #1877f2; }
    .share-btn--whatsapp { background: #25d366; }
    .share-btn--copy { background: #e2e8f0; color: #444; cursor: pointer; border: none; font-family: inherit; }

    /* === UPGRADE: Better typography & centering === */
    .article { max-width: 780px; margin: 0 auto; padding: 0 20px; }
    .article__title { font-size: clamp(1.8rem, 4vw, 2.4rem); line-height: 1.2; text-align: center; margin: 1rem 0; }
    .article__meta { text-align: center; justify-content: center; }
    .article__hero { text-align: center; margin: 1.5rem 0; }
    .article__hero img { margin: 0 auto; }
    .article p { font-size: 1.05rem; line-height: 1.75; margin-bottom: 1rem; color: #374151; }
    .article ul, .article ol { font-size: 1.05rem; line-height: 1.75; margin-bottom: 1rem; padding-left: 1.5rem; }
    .article li { margin-bottom: 0.5rem; }
    .article h2 { font-size: clamp(1.3rem, 3vw, 1.8rem); margin: 2rem 0 1rem; padding-top: 1rem; border-top: 1px solid #e5e7eb; }
    .article table { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: 0.95rem; overflow-x: auto; display: block; }
    .article th, .article td { padding: 10px 12px; border: 1px solid #e5e7eb; text-align: left; }
    .article th { background: #f9fafb; font-weight: 700; }
    .article pre { background: #1e293b; color: #e2e8f0; padding: 1rem; border-radius: 8px; overflow-x: auto; font-size: 0.9rem; margin: 1rem 0; }
    .toc { max-width: 600px; margin: 1.5rem auto; }
    .cta-box { text-align: center; max-width: 700px; margin: 2rem auto; padding: 2rem; border-radius: 16px; background: linear-gradient(135deg, #d94f2b 0%, #f97316 100%); }
    .cta-box h3 { font-size: 1.4rem; color: #fff; margin-bottom: 0.8rem; }
    .cta-box p { color: rgba(255,255,255,0.9); margin-bottom: 1.2rem; font-size: 1rem; }
    .cta-box .btn { display: inline-block; padding: 14px 32px; border-radius: 10px; font-weight: 800; font-size: 1.1rem; text-decoration: none; transition: transform 0.2s, box-shadow 0.2s; }
    .cta-box .btn:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.2); }
    .faq { max-width: 700px; margin: 2rem auto; }
    .share-bar { max-width: 700px; margin: 2rem auto; text-align: center; }
    .breadcrumb { max-width: 780px; margin: 0 auto; padding: 1rem 20px; font-size: 0.85rem; }
    @media (max-width: 640px) {
      .article { padding: 0 16px; }
      .article p, .article ul, .article ol { font-size: 1rem; }
      .cta-box { padding: 1.5rem; margin: 1.5rem 1rem; }
      .cta-box h3 { font-size: 1.2rem; }
    }