/* ---- Reset & Base ---- */
  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

  :root {
    --color-emerald-400: #34d399;
    --color-emerald-500: #10b981;
    --color-emerald-600: #059669;
    --color-emerald-700: #047857;
    --color-gray-50:  #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    --color-white:    #ffffff;
    --color-black:    #000000;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI',
                 Roboto, Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', Consolas,
                 'Courier New', monospace;

    --nav-height: 64px;
    --container-max: 1200px;
    --content-max:    780px;
    --border-radius-sm: 6px;
    --border-radius-md: 10px;
    --border-radius-lg: 16px;
    --border-radius-full: 9999px;

    --shadow-sm:  0 1px 2px 0 rgba(0,0,0,.05);
    --shadow-md:  0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -2px rgba(0,0,0,.1);
    --shadow-lg:  0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -4px rgba(0,0,0,.1);
    --shadow-xl:  0 20px 25px -5px rgba(0,0,0,.1), 0 8px 10px -6px rgba(0,0,0,.1);

    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
  }

  html { font-size: 17px; scroll-behavior: smooth; }

  body {
    font-family: var(--font-sans);
    color: var(--color-gray-600);
    background: var(--color-white);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
    padding-top: var(--nav-height);
  }

  .container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
  }

  img { max-width: 100%; height: auto; display: block; }
  a { color: inherit; text-decoration: none; }

  /* ============================================================
     NAV BAR
     ============================================================ */
  .site-nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-gray-200);
    box-shadow: var(--shadow-sm);
  }

  .site-nav__inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
  }

  /* Logo */
  .site-nav__logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex-shrink: 0;
  }

  .site-nav__logo-icon {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
  }

  .site-nav__logo-text {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-gray-900);
    letter-spacing: -0.02em;
  }

  .site-nav__logo-text .accent {
    color: var(--color-emerald-500);
  }

  /* Desktop Nav Links */
  .site-nav__links {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
  }

  .site-nav__links a {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-gray-600);
    padding: 6px 12px;
    border-radius: var(--border-radius-sm);
    transition: color var(--transition-fast), background var(--transition-fast);
    white-space: nowrap;
  }

  .site-nav__links a:hover {
    color: var(--color-gray-900);
    background: var(--color-gray-100);
  }

  .site-nav__links a.active {
    color: var(--color-emerald-600);
    background: rgba(16, 185, 129, 0.08);
  }

  /* CTA Button */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-sans);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition:
      background var(--transition-fast),
      color var(--transition-fast),
      transform var(--transition-fast),
      box-shadow var(--transition-fast);
    white-space: nowrap;
  }

  .btn:active { transform: translateY(1px); }

  .btn--nav {
    font-size: 0.875rem;
    padding: 8px 18px;
    border-radius: var(--border-radius-full);
    background: var(--color-black);
    color: var(--color-white);
    box-shadow: var(--shadow-sm);
  }

  .btn--nav:hover {
    background: var(--color-gray-800);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
  }

  /* Hamburger */
  .site-nav__hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    cursor: pointer;
    padding: 4px;
    border-radius: var(--border-radius-sm);
    transition: background var(--transition-fast);
  }

  .site-nav__hamburger:hover { background: var(--color-gray-100); }

  .site-nav__hamburger-bar {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-gray-700);
    border-radius: 2px;
    transition: transform var(--transition-base), opacity var(--transition-base);
  }

  /* Mobile Menu */
  .site-nav__mobile-menu {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0; right: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    box-shadow: var(--shadow-lg);
    padding: 16px 24px 24px;
    z-index: 999;
  }

  .site-nav__mobile-menu.is-open { display: block; }

  .site-nav__mobile-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 16px;
  }

  .site-nav__mobile-links a {
    display: block;
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-gray-700);
    padding: 10px 12px;
    border-radius: var(--border-radius-sm);
    transition: background var(--transition-fast), color var(--transition-fast);
  }

  .site-nav__mobile-links a:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-900);
  }

  .btn--mobile-cta {
    display: block;
    width: 100%;
    text-align: center;
    padding: 12px 24px;
    font-size: 1rem;
    border-radius: var(--border-radius-md);
    background: var(--color-black);
    color: var(--color-white);
    font-weight: 600;
  }

  .btn--mobile-cta:hover { background: var(--color-gray-800); }

  @media (max-width: 768px) {
    .site-nav__links,
    .btn--nav { display: none; }
    .site-nav__hamburger { display: flex; }
  }

  /* Hamburger open state */
  .site-nav__hamburger[aria-expanded="true"] .site-nav__hamburger-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .site-nav__hamburger[aria-expanded="true"] .site-nav__hamburger-bar:nth-child(2) {
    opacity: 0;
  }
  .site-nav__hamburger[aria-expanded="true"] .site-nav__hamburger-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* ============================================================
     FOOTER
     ============================================================ */
  .site-footer {
    background: var(--color-gray-900);
    color: var(--color-gray-400);
    padding: 64px 0 0;
    margin-top: 80px;
  }

  .site-footer__grid {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 2fr 1.2fr 1.2fr 1.5fr;
    gap: 48px;
  }

  /* Brand column */
  .footer-brand__logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    text-decoration: none;
  }

  .footer-brand__logo-text {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-white);
  }

  .footer-brand__logo-text .accent { color: var(--color-emerald-400); }

  .footer-brand__tagline {
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--color-gray-400);
    max-width: 260px;
  }

  /* Footer column headings */
  .footer-col__heading {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-gray-300);
    text-transform: uppercase;
    letter-spacing: 0.07em;
    margin-bottom: 16px;
  }

  .footer-col__list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .footer-col__list a {
    font-size: 0.9375rem;
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
    text-decoration: none;
  }

  .footer-col__list a:hover { color: var(--color-white); }

  /* Get Started column */
  .footer-cta__body {
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 20px;
    color: var(--color-gray-400);
  }

  .btn--footer-cta {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--border-radius-md);
    background: var(--color-emerald-500);
    color: var(--color-white);
    font-size: 0.9375rem;
    font-weight: 600;
    transition: background var(--transition-fast), transform var(--transition-fast);
  }

  .btn--footer-cta:hover {
    background: var(--color-emerald-600);
    transform: translateY(-1px);
  }

  /* Footer bottom bar */
  .site-footer__bottom {
    max-width: var(--container-max);
    margin: 48px auto 0;
    padding: 20px 24px;
    border-top: 1px solid var(--color-gray-800);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
  }

  .site-footer__copyright {
    font-size: 0.875rem;
    color: var(--color-gray-500);
  }

  .site-footer__legal {
    display: flex;
    gap: 24px;
    list-style: none;
  }

  .site-footer__legal a {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    transition: color var(--transition-fast);
  }

  .site-footer__legal a:hover { color: var(--color-gray-300); }

  @media (max-width: 900px) {
    .site-footer__grid {
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }
  }

  @media (max-width: 540px) {
    .site-footer__grid {
      grid-template-columns: 1fr;
      gap: 32px;
    }
    .site-footer__bottom {
      flex-direction: column;
      align-items: flex-start;
    }
  }

  /* ============================================================
     ARTICLE STYLES
     ============================================================ */

  /* Layout */
  .article-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 48px;
    align-items: start;
    max-width: 1060px;
    margin: 0 auto;
    padding: 48px 24px 64px;
  }

  @media (max-width: 900px) {
    .article-layout {
      grid-template-columns: 1fr;
    }
  }

  /* Hero — image and content OVERLAP (content sits on top of dimmed image) */
  .article-hero {
    position: relative;
    background: var(--color-gray-900);
    overflow: hidden;
    min-height: 420px;
  }

  .article-hero__image-wrapper {
    position: absolute;
    inset: 0;
    overflow: hidden;
  }

  .article-hero__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
  }

  /* Defensive: legacy `.article-hero-image` (single-dash) — collapse to nothing */
  .article-hero-image {
    display: none !important;
  }

    .article-hero__gradient-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
      to bottom,
      rgba(17, 24, 39, 0.35) 0%,
      rgba(17, 24, 39, 0.65) 55%,
      rgba(17, 24, 39, 0.92) 100%
    );
  }

  .article-hero__content {
    position: relative;
    padding: 96px 24px 48px;
    max-width: var(--container-max);
    margin: 0 auto;
    min-height: 420px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
  }

  /* Breadcrumb */
  .breadcrumb__list {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    list-style: none;
    font-size: 0.8125rem;
    color: rgba(255,255,255,0.65);
    margin-bottom: 16px;
  }

  .breadcrumb__item + .breadcrumb__item::before {
    content: '/';
    margin-right: 4px;
    opacity: 0.5;
  }

  .breadcrumb__item a { color: inherit; transition: color var(--transition-fast); }
  .breadcrumb__item a:hover { color: var(--color-white); }
  .breadcrumb__item--current { color: rgba(255,255,255,0.45); }

  /* Article meta */
  .article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 4px 8px;
    font-size: 0.8125rem;
    color: rgba(255,255,255,0.65);
    margin-bottom: 16px;
  }

  .article-meta__separator { opacity: 0.4; }

  .article-meta__category {
    background: var(--color-emerald-500);
    color: var(--color-white);
    padding: 2px 10px;
    border-radius: var(--border-radius-full);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
  }

  /* Hero title & excerpt */
  .article-hero__title {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 800;
    color: var(--color-white);
    line-height: 1.2;
    letter-spacing: -0.025em;
    margin-bottom: 16px;
    max-width: 820px;
  }

  .article-hero__excerpt {
    font-size: 1.125rem;
    color: rgba(255,255,255,0.75);
    line-height: 1.7;
    max-width: 680px;
  }

  /* ---- Article Sidebar ---- */
  .article-sidebar {
    position: sticky;
    top: calc(var(--nav-height) + 24px);
    max-height: calc(100vh - var(--nav-height) - 48px);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 24px;
  }

  /* Scrollbar for TOC sidebar */
  .article-sidebar::-webkit-scrollbar { width: 4px; }
  .article-sidebar::-webkit-scrollbar-track { background: transparent; }
  .article-sidebar::-webkit-scrollbar-thumb {
    background: var(--color-gray-200);
    border-radius: 4px;
  }

  /* TOC Widget */
  .toc-widget {
    background: var(--color-gray-50);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
  }

  .toc-widget__toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 14px 18px;
    background: transparent;
    border: none;
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--color-gray-700);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    transition: background var(--transition-fast);
  }

  .toc-widget__toggle:hover { background: var(--color-gray-100); }

  .toc-widget__toggle-icon {
    font-size: 1.25rem;
    line-height: 1;
    color: var(--color-gray-400);
    font-weight: 400;
  }

  .toc-widget__nav { padding: 8px 0 14px; }

  .toc-widget__list {
    list-style: none;
    padding: 0;
    counter-reset: toc-counter;
  }

  .toc-widget__item { counter-increment: toc-counter; }

  .toc-widget__link {
    display: block;
    padding: 6px 18px 6px 18px;
    font-size: 0.875rem;
    color: var(--color-gray-600);
    line-height: 1.5;
    transition: color var(--transition-fast), background var(--transition-fast);
    border-left: 2px solid transparent;
  }

  .toc-widget__link:hover {
    color: var(--color-emerald-600);
    background: rgba(16, 185, 129, 0.06);
    border-left-color: var(--color-emerald-400);
  }

  .toc-widget__link--active {
    color: var(--color-emerald-600);
    font-weight: 600;
    border-left-color: var(--color-emerald-500);
    background: rgba(16, 185, 129, 0.06);
  }

  .toc-widget__sublist {
    list-style: none;
    padding: 0;
  }

  .toc-widget__item--sub .toc-widget__link {
    padding-left: 30px;
    font-size: 0.8125rem;
    color: var(--color-gray-500);
  }

  /* Sidebar CTA */
  .sidebar-cta {
    background: var(--color-gray-900);
    border-radius: var(--border-radius-lg);
    padding: 22px;
    text-align: center;
  }

  .sidebar-cta__headline {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 8px;
    line-height: 1.4;
  }

  .sidebar-cta__body {
    font-size: 0.875rem;
    color: var(--color-gray-400);
    margin-bottom: 16px;
    line-height: 1.6;
  }

  .btn--primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 18px;
    border-radius: var(--border-radius-md);
    background: var(--color-emerald-500);
    color: var(--color-white);
    font-size: 0.875rem;
    font-weight: 600;
    transition: background var(--transition-fast), transform var(--transition-fast);
    text-decoration: none;
  }

  .btn--primary:hover {
    background: var(--color-emerald-600);
    transform: translateY(-1px);
  }

  .btn--block { display: flex; width: 100%; }

  /* ---- Article Prose ---- */
  .article-prose {
    font-size: 1.0625rem;
    line-height: 1.85;
    color: var(--color-gray-600);
    max-width: var(--content-max);
    word-break: break-word;
  }

  .article-prose > * + * { margin-top: 1.5em; }

  /* Headings */
  .article-prose h2 {
    font-size: clamp(1.375rem, 2.5vw, 1.75rem);
    font-weight: 800;
    color: var(--color-gray-900);
    line-height: 1.25;
    letter-spacing: -0.02em;
    margin-top: 2.5em;
    margin-bottom: 0.65em;
    padding-top: 12px;
    scroll-margin-top: calc(var(--nav-height) + 20px);
  }

  .article-prose h3 {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    font-weight: 700;
    color: var(--color-gray-900);
    line-height: 1.3;
    letter-spacing: -0.015em;
    margin-top: 2em;
    margin-bottom: 0.5em;
    scroll-margin-top: calc(var(--nav-height) + 20px);
  }

  .article-prose h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-gray-800);
    margin-top: 1.75em;
    margin-bottom: 0.5em;
  }

  /* Paragraphs & Lists */
  .article-prose p { max-width: 680px; }
  .article-prose p + p { margin-top: 1.25em; }

  .article-prose ul,
  .article-prose ol {
    padding-left: 1.5em;
    display: flex;
    flex-direction: column;
    gap: 0.5em;
  }

  .article-prose li { padding-left: 0.35em; }
  .article-prose ul { list-style-type: disc; }
  .article-prose ol { list-style-type: decimal; }

  /* Links */
  .article-prose a {
    color: var(--color-emerald-600);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
    transition: color var(--transition-fast);
  }

  .article-prose a:hover { color: var(--color-emerald-700); }

  /* Strong / Bold */
  .article-prose strong {
    font-weight: 700;
    color: var(--color-gray-800);
  }

  /* Inline code */
  .article-prose code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background: var(--color-gray-100);
    color: var(--color-gray-800);
    padding: 0.15em 0.45em;
    border-radius: 4px;
    border: 1px solid var(--color-gray-200);
  }

  /* Code blocks */
  .article-prose pre {
    background: var(--color-gray-50);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius-md);
    padding: 20px 24px;
    overflow-x: auto;
    font-size: 0.9rem;
    line-height: 1.65;
  }

  .article-prose pre code {
    background: none;
    border: none;
    padding: 0;
    font-size: inherit;
    color: var(--color-gray-800);
  }

  /* Blockquote / Callout */
  .article-prose blockquote,
  .article-prose .callout {
    margin: 2em 0;
    padding: 20px 24px;
    background: var(--color-gray-50);
    border-left: 4px solid var(--color-emerald-500);
    border-radius: 0 var(--border-radius-md) var(--border-radius-md) 0;
    font-style: italic;
    color: var(--color-gray-700);
  }

  .article-prose blockquote p,
  .article-prose .callout p {
    margin: 0;
    font-size: 1rem;
    line-height: 1.75;
  }

  /* Tables */
  .article-prose table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9375rem;
    overflow-x: auto;
    display: block;
    margin: 2em 0;
  }

  .article-prose thead th {
    background: var(--color-gray-800);
    color: var(--color-white);
    font-weight: 600;
    text-align: left;
    padding: 12px 16px;
    font-size: 0.875rem;
    white-space: nowrap;
  }

  .article-prose tbody tr:nth-child(even) { background: var(--color-gray-50); }
  .article-prose tbody tr:hover { background: rgba(16,185,129,0.06); }

  .article-prose td {
    padding: 11px 16px;
    border-bottom: 1px solid var(--color-gray-200);
    vertical-align: top;
    color: var(--color-gray-700);
    line-height: 1.6;
  }

  /* Horizontal rule */
  .article-prose hr {
    border: none;
    border-top: 1px solid var(--color-gray-200);
    margin: 3em 0;
  }

  /* Inline CTA box inside article */
  .inline-cta {
    background: var(--color-gray-900);
    border-radius: var(--border-radius-lg);
    padding: 24px 28px;
    margin: 2.5em 0;
    color: var(--color-gray-300);
    font-size: 0.9375rem;
    line-height: 1.7;
  }

  .inline-cta p { max-width: none; color: var(--color-gray-300); }
  .inline-cta p strong,
  .inline-cta p b,
  .inline-cta strong,
  .inline-cta b { color: var(--color-white) !important; font-weight: 700; }
  .inline-cta em,
  .inline-cta i { color: var(--color-gray-200); }
  .inline-cta a { color: var(--color-emerald-400); }
  .inline-cta a:hover { color: var(--color-emerald-300); }

  /* ---- FAQ Section ---- */
  .article-faq {
    margin-top: 3em;
    padding-top: 2.5em;
    border-top: 1px solid var(--color-gray-200);
  }

  .article-faq__heading {
    font-size: 1.625rem;
    font-weight: 800;
    color: var(--color-gray-900);
    margin-bottom: 1.25em;
    letter-spacing: -0.02em;
  }

  .faq-list { display: flex; flex-direction: column; gap: 4px; }

  .faq-item {
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    transition: border-color var(--transition-fast);
  }

  .faq-item:hover { border-color: var(--color-gray-300); }

  .faq-item__trigger {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    width: 100%;
    padding: 18px 20px;
    background: var(--color-gray-50);
    border: none;
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-gray-800);
    text-align: left;
    line-height: 1.5;
    transition: background var(--transition-fast), color var(--transition-fast);
  }

  .faq-item__trigger:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-900);
  }

  .faq-item__trigger[aria-expanded="true"] {
    background: rgba(16, 185, 129, 0.07);
    color: var(--color-emerald-700);
  }

  .faq-item__icon {
    font-size: 1.375rem;
    line-height: 1;
    font-weight: 400;
    color: var(--color-gray-400);
    flex-shrink: 0;
    transition: color var(--transition-fast);
  }

  .faq-item__trigger[aria-expanded="true"] .faq-item__icon {
    color: var(--color-emerald-500);
  }

  .faq-item__answer {
    padding: 0 20px 20px;
    font-size: 0.9375rem;
    color: var(--color-gray-600);
    line-height: 1.75;
    border-top: 1px solid var(--color-gray-200);
    padding-top: 16px;
    background: var(--color-white);
  }

  .faq-item__answer p + p { margin-top: 0.75em; }

  /* ---- Closing CTA Box ---- */
  .article-cta-box { margin: 3.5em 0; }

  .cta-box {
    background: var(--color-emerald-500);
    border-radius: var(--border-radius-lg);
    padding: 40px 48px;
    text-align: center;
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
  }

  .cta-box::before {
    content: '';
    position: absolute;
    top: -40px; right: -40px;
    width: 180px; height: 180px;
    border-radius: 50%;
    background: rgba(255,255,255,0.08);
    pointer-events: none;
  }

  .cta-box__heading {
    font-size: clamp(1.375rem, 3vw, 1.875rem);
    font-weight: 800;
    color: var(--color-white);
    margin-bottom: 14px;
    line-height: 1.25;
    letter-spacing: -0.02em;
  }

  .cta-box__body {
    font-size: 1.0625rem;
    color: rgba(255,255,255,0.87);
    max-width: 520px;
    margin: 0 auto 28px;
    line-height: 1.7;
  }

  .btn--cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 36px;
    border-radius: var(--border-radius-full);
    background: var(--color-white);
    color: var(--color-emerald-700);
    font-size: 1.0625rem;
    font-weight: 700;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  }

  .btn--cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
  }

  .btn--lg { padding: 16px 40px; font-size: 1.125rem; }

  .cta-box__subtext {
    font-size: 0.875rem;
    color: rgba(255,255,255,0.65);
    margin-top: 12px;
    margin-bottom: 0;
  }

  /* ---- Article Footer Meta ---- */
  .article-footer-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding-top: 32px;
    border-top: 1px solid var(--color-gray-200);
    margin-top: 2.5em;
    font-size: 0.875rem;
    color: var(--color-gray-500);
  }

  .article-tags {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
  }

  .article-tags__label,
  .article-share__label { font-weight: 600; color: var(--color-gray-600); }

  .article-tags__tag {
    background: var(--color-gray-100);
    color: var(--color-gray-600);
    padding: 3px 10px;
    border-radius: var(--border-radius-full);
    font-size: 0.8125rem;
    transition: background var(--transition-fast), color var(--transition-fast);
    text-decoration: none;
  }

  .article-tags__tag:hover {
    background: var(--color-emerald-500);
    color: var(--color-white);
  }

  .article-share {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
  }

  .article-share__link {
    color: var(--color-gray-500);
    transition: color var(--transition-fast);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
  }

  .article-share__link:hover { color: var(--color-emerald-600); }

  /* ---- Related Posts ---- */
  .related-posts {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px 80px;
    border-top: 1px solid var(--color-gray-200);
    padding-top: 56px;
  }

  .related-posts__heading {
    font-size: 1.625rem;
    font-weight: 800;
    color: var(--color-gray-900);
    margin-bottom: 32px;
    letter-spacing: -0.02em;
  }

  .related-posts__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 28px;
  }

  /* Post Card */
  .post-card {
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: border-color var(--transition-base), box-shadow var(--transition-base),
                transform var(--transition-base);
    background: var(--color-white);
  }

  .post-card:hover {
    border-color: var(--color-gray-300);
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
  }

  .post-card__image-link { display: block; overflow: hidden; }

  .post-card__image {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    transition: transform var(--transition-slow);
  }

  .post-card:hover .post-card__image { transform: scale(1.04); }

  .post-card__body { padding: 20px 22px 24px; }

  .post-card__category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-emerald-600);
    margin-bottom: 8px;
  }

  .post-card__title {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--color-gray-900);
    line-height: 1.4;
    margin-bottom: 10px;
  }

  .post-card__title a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
  }

  .post-card__title a:hover { color: var(--color-emerald-600); }

  .post-card__excerpt {
    font-size: 0.9rem;
    color: var(--color-gray-500);
    line-height: 1.65;
    margin-bottom: 14px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .post-card__read-more {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-emerald-600);
    text-decoration: none;
    transition: color var(--transition-fast);
  }

  .post-card__read-more:hover { color: var(--color-emerald-700); }

  /* ============================================================
     RESPONSIVE HELPERS
     ============================================================ */
  @media (max-width: 900px) {
    .article-layout { padding: 32px 20px 48px; }
    .article-hero { min-height: 320px; }
    .article-hero__content { padding: 72px 20px 32px; min-height: 320px; }
    .cta-box { padding: 32px 24px; }
  }

  @media (max-width: 600px) {
    .article-hero__title { font-size: 1.625rem; }
    .article-prose { font-size: 1rem; }
    .article-prose h2 { font-size: 1.375rem; }
    .article-prose h3 { font-size: 1.125rem; }
    .cta-box { padding: 28px 20px; }
    .btn--cta, .btn--lg { width: 100%; }
    .article-footer-meta { flex-direction: column; align-items: flex-start; }
    .related-posts__grid { grid-template-columns: 1fr; }
    .related-posts { padding-bottom: 56px; }
  }