:root {
      --doc-bg: #f4f7fb;
      --doc-panel: #ffffff;
      --doc-border: #dfe8f2;
      --doc-title: #0d2a52;
      --doc-text: #22384f;
      --doc-link: #124f86;
      --doc-link-hover: #c12083;
      --doc-muted: #4f6478;
      --fatpipe-accent: #c12083;
      --sticky-header-offset: 88px;
      --sticky-sidebar-offset: 148px;
      --sticky-content-offset: 170px;
    }

    html { scroll-behavior: smooth; }
    body.main { background: #ffffff; }

    .row {
      --bs-gutter-x: 1.5rem;
      --bs-gutter-y: 0;
      display: flex;
      flex-wrap: wrap;
      margin-top: 10px;
      margin-right: calc(-0.5 * var(--bs-gutter-x));
      margin-left: calc(-0.5 * var(--bs-gutter-x));
    }

    .reading-progress-bar {
      position: fixed;
      top: 0;
      left: 0;
      width: 0%;
      height: 3px;
      background: linear-gradient(90deg, #c12083, #124f86);
      z-index: 99999;
      transition: width 0.08s linear;
      pointer-events: none;
    }

    .doc-wrapper {
      margin: 0;
      background: var(--doc-panel);
      border: 1px solid var(--doc-border);
      border-radius: 14px;
      box-shadow: 0 10px 32px rgba(13, 42, 82, 0.08);
      padding: 1rem;
    }

    .left-sticky-nav {
      position: sticky;
      top: 90px;
      align-self: flex-start;
      border: 1px solid var(--doc-border);
      background-color: var(--doc-panel);
      border-radius: 14px;
      box-shadow: 0 8px 24px rgba(13, 42, 82, 0.07);
      padding: 1.2rem 1rem;
      overflow: hidden;
    }

    .left-sticky-nav h2 {
      font-size: 0.75rem;
      color: var(--doc-muted);
      margin-bottom: 0.6rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.07em;
    }

    .sidebar-breadcrumb {
      margin-bottom: 0.9rem;
      padding: 0.55rem 0.65rem;
      border: 1px solid #e6eef8;
      border-radius: 8px;
      background: #f8fbff;
    }

    .sidebar-breadcrumb .breadcrumb {
      margin-bottom: 0;
      padding: 0;
      background: transparent;
      font-size: 0.76rem;
      line-height: 1.4;
    }

    .sidebar-breadcrumb .breadcrumb-item,
    .sidebar-breadcrumb .breadcrumb-item a {
      color: var(--doc-muted);
      text-decoration: none;
    }

    .sidebar-breadcrumb .breadcrumb-item a:hover {
      color: var(--doc-link-hover);
      text-decoration: underline;
    }

    .sidebar-breadcrumb .breadcrumb-item.active {
      color: var(--doc-title);
      font-weight: 600;
    }

    .left-sticky-nav > ul {
      margin-bottom: 0;
      padding-left: 0;
      list-style: none;
    }

    .left-sticky-nav > ul > li {
      margin-bottom: 0;
      position: relative;
    }

    .left-sticky-nav > ul > li > a {
      display: block;
      padding: 0.35rem 0.85rem;
      border-radius: 7px;
      color: var(--doc-text);
      text-decoration: none;
      font-size: 0.875rem;
      transition: background 0.15s, color 0.15s;
    }

    .left-sticky-nav > ul > li > a:hover {
      background: #f0f6ff;
      color: var(--doc-link);
    }

    .left-sticky-nav > ul > li.nav-active > a {
      background: #fdf0fa;
      color: var(--fatpipe-accent);
      font-weight: 700;
    }

    .left-sticky-nav > ul > li.nav-active::before {
      content: '';
      position: absolute;
      left: 0;
      top: 20%;
      height: 60%;
      width: 3px;
      background: var(--fatpipe-accent);
      border-radius: 0 3px 3px 0;
    }

    .next-suggestions {
      border-top: 1px solid var(--doc-border);
      margin-top: 0.9rem;
      padding-top: 0.9rem;
    }

    .next-suggestions ul {
      padding-left: 0;
      list-style: none;
      margin-bottom: 0;
    }

    .next-suggestions li a {
      display: block;
      padding: 0.3rem 0.5rem;
      font-size: 0.85rem;
      color: var(--doc-link);
      text-decoration: none;
      border-radius: 6px;
      transition: background 0.15s, color 0.15s;
    }

    .next-suggestions li a:hover {
      background: #f0f6ff;
      color: var(--doc-link-hover);
    }

    .doc-title {
      border-bottom: 1px solid var(--doc-border);
      margin-bottom: 1.5rem;
      padding-bottom: 1.2rem;
    }

    .doc-title h1 {
      color: var(--doc-title);
      font-size: 2.1rem;
      margin-bottom: 0.4rem;
      font-weight: 700;
      line-height: 1.2;
    }

    .doc-subtitle {
      margin-bottom: 0;
      color: var(--doc-text);
      line-height: 1.8;
      font-size: 1.05rem;
    }

    .reading-meta {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 0.8rem;
      font-size: 0.84rem;
      color: var(--doc-muted);
      margin-bottom: 0.75rem;
    }

    .reading-meta span {
      display: flex;
      align-items: center;
      gap: 0.3rem;
    }

    .reading-meta .tag-badge {
      background: #eef4ff;
      color: var(--doc-link);
      padding: 0.18rem 0.65rem;
      border-radius: 999px;
      font-weight: 600;
      font-size: 0.78rem;
      border: 1px solid #d0e4f7;
    }

    .doc-section {
      margin-top: 2.2rem;
      padding-top: 1.8rem;
      scroll-margin-top: var(--sticky-content-offset);
      border-top: 1px solid #eef2f8;
    }

    .doc-section:first-of-type {
      border-top: none;
      margin-top: 0;
      padding-top: 0;
    }

    .doc-section h2 {
      color: var(--doc-title);
      font-size: 1.38rem;
      margin-bottom: 0.9rem;
      font-weight: 700;
      padding-left: 0;
      padding-bottom: 0.35rem;
      border-left: none;
      border-bottom: 1px solid #e8eff8;
      line-height: 1.3;
    }

    .doc-section h3 {
      color: var(--doc-link);
      font-size: 1.05rem;
      margin-top: 1.3rem;
      margin-bottom: 0.45rem;
      font-weight: 600;
    }

    .doc-section p,
    .doc-section li {
      color: var(--doc-text);
      line-height: 1.82;
      font-size: 1rem;
    }

    .doc-section ul,
    .doc-section ol {
      padding-left: 1.3rem;
    }

    .doc-section a {
      color: var(--doc-link);
      text-underline-offset: 2px;
    }

    .doc-section a:hover {
      color: var(--doc-link-hover);
    }

    .callout-box {
      background: #f0f7ff;
      border-left: 4px solid #124f86;
      border-radius: 0 10px 10px 0;
      padding: 1rem 1.2rem;
      margin: 1.1rem 0;
    }

    .callout-box.callout-pink {
      background: #fff6fc;
      border-left-color: #c12083;
    }

    .callout-box p {
      margin-bottom: 0;
      font-size: 0.97rem !important;
      line-height: 1.72 !important;
    }

    .callout-box strong {
      color: var(--doc-title);
    }

    .benefits-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 0.85rem;
      margin-top: 1rem;
    }

    .benefit-card {
      background: #f8fafd;
      border: 1px solid #e2ecf8;
      border-radius: 10px;
      padding: 0.95rem 1.1rem;
      border-top: 3px solid var(--doc-link);
    }

    .benefit-card strong {
      display: block;
      color: var(--doc-title);
      font-size: 0.94rem;
      margin-bottom: 0.3rem;
    }

    .benefit-card p {
      margin-bottom: 0;
      font-size: 0.88rem !important;
      color: var(--doc-muted) !important;
      line-height: 1.55 !important;
    }

    .comparison-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 0.9rem;
      margin-top: 1rem;
    }

    .comparison-card {
      background: #f8fafd;
      border: 1px solid #e2ecf8;
      border-radius: 10px;
      padding: 1rem 1.1rem;
    }

    .comparison-card h4 {
      color: var(--fatpipe-accent);
      font-size: 0.94rem;
      font-weight: 700;
      margin-bottom: 0.4rem;
    }

    .comparison-card p {
      margin-bottom: 0;
      font-size: 0.9rem !important;
      color: var(--doc-text) !important;
      line-height: 1.65 !important;
    }

    .short-answers-list {
      list-style: none;
      padding-left: 0;
      margin-bottom: 0;
    }

    .short-answers-list li {
      background: #f8fafd;
      border: 1px solid #e2ecf8;
      border-left: 3px solid #124f86;
      border-radius: 8px;
      padding: 0.85rem 0.95rem;
      margin-bottom: 0.55rem;
    }

    .short-answers-list strong {
      display: block;
      color: var(--doc-title);
      margin-bottom: 0.2rem;
      font-size: 0.95rem;
    }

    .cta-box {
      background: linear-gradient(130deg, #0d2a52 0%, #124f86 100%);
      border-radius: 14px;
      padding: 1.6rem 1.8rem;
      margin-top: 1.3rem;
    }

    .cta-box h3 {
      color: #ffffff !important;
      font-size: 1.18rem;
      margin-top: 0 !important;
      margin-bottom: 0.5rem;
    }

    .cta-box p {
      color: rgba(255,255,255,0.85) !important;
      font-size: 0.96rem !important;
      line-height: 1.65 !important;
      margin-bottom: 0.6rem !important;
    }

    .btn-brand {
      background: linear-gradient(135deg, #124f86 0%, #0a1f3a 100%);
      color: #ffffff;
      border-radius: 8px;
      border: none;
      padding: 9px 18px;
      text-decoration: none;
      display: inline-block;
      font-weight: 700;
      margin-right: 8px;
      margin-top: 6px;
      font-size: 0.9rem;
      transition: all 0.3s ease;
      box-shadow: 0 6px 20px rgba(18, 79, 134, 0.25);
    }

    .btn-brand:hover {
      background: linear-gradient(135deg, #c12083 0%, #8f1665 100%);
      color: #ffffff;
      transform: translateY(-3px);
      box-shadow: 0 12px 32px rgba(193, 32, 131, 0.35);
    }

    .floating-cta {
      position: fixed;
      right: 0;
      top: 50%;
      transform: translateY(-50%);
      z-index: 1035;
      width: auto;
      margin-top: 0;
      padding: 1rem 0.8rem;
      background: transparent;
      border-radius: 0;
      box-shadow: none;
    }

    .floating-cta-actions {
      display: flex;
      flex-direction: column;
      gap: 0.6rem;
      justify-content: center;
    }

    .floating-cta .btn-brand {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      margin-right: 0;
      margin-top: 0;
      width: auto;
      padding: 0.85rem 1.1rem;
      border-radius: 8px 0 0 8px;
      border: 1px solid rgba(255, 255, 255, 0.3);
      background: linear-gradient(135deg, #3b82f6, #9333ea, #ec4899);
      color: #ffffff;
      box-shadow: 0 8px 24px rgba(255, 107, 53, 0.3);
      font-size: 0.85rem;
      font-weight: 600;
      line-height: 1.2;
      transition: all 0.3s ease;
      text-decoration: none;
    }

    .floating-cta .btn-brand:hover {
      background: linear-gradient(135deg, #3b82f6, #9333ea, #ec4899);
      border-color: rgba(255, 255, 255, 0.6);
      transform: translateX(-8px);
      box-shadow: 0 12px 36px rgba(255, 107, 53, 0.4);
    }

    .floating-cta .btn-brand.primary-action {
      background: linear-gradient(135deg, #3b82f6, #9333ea, #ec4899);
      border-color: rgba(255, 255, 255, 0.4);
      box-shadow: 0 10px 28px rgba(193, 32, 131, 0.35);
    }

    .floating-cta .btn-brand.primary-action:hover {
      background: linear-gradient(135deg, #3b82f6, #9333ea, #ec4899);
      border-color: rgba(255, 255, 255, 0.7);
      transform: translateX(-10px);
      box-shadow: 0 16px 40px rgba(255, 20, 147, 0.45);
    }

    .floating-cta .cta-label {
      display: inline-flex;
      align-items: center;
      min-width: 0;
      white-space: nowrap;
    }

    .floating-cta .cta-icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 1rem;
      transition: all 0.3s ease;
    }

    .floating-cta .btn-brand:hover .cta-icon {
      transform: rotate(12deg) scale(1.15);
    }

    #takeaways .takeaway-list {
      list-style: none;
      padding-left: 0;
    }

    #takeaways .takeaway-list li {
      padding: 0.75rem 1rem 0.75rem 1.1rem;
      background: #f8fafd;
      border-left: 3px solid var(--fatpipe-accent);
      border-radius: 0 8px 8px 0;
      margin-bottom: 0.55rem;
      font-size: 0.97rem;
      color: var(--doc-text);
      line-height: 1.65;
    }

    .faq-container {
      display: grid;
      
    }

    .faq-item {
      border: 1px solid #e2ecf8;
      border-radius: 10px;
      overflow: hidden;
      background: #ffffff;
    }

    .faq-question {
      width: 100%;
      border: 0;
      background: #f8fbff;
      color: #c12083;
      text-align: left;
      padding: 0.9rem 1rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-weight: 600;
    }

    .faq-answer {
      display: none;
      padding: 0.75rem 1rem 1rem;
      border-top: 1px solid #edf3fb;
    }

    .faq-answer p {
      margin-bottom: 0;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    .faq-item.active .faq-question i {
      transform: rotate(90deg);
    }

    @media (max-width: 991px) {
      .doc-wrapper { padding: 1.3rem 1.1rem; }
      .left-sticky-nav { position: static; margin-bottom: 1rem; top: auto; }
      .doc-title h1 { font-size: 1.75rem; }
      .doc-section { scroll-margin-top: calc(var(--sticky-header-offset) + 22px); }
      .benefits-grid { grid-template-columns: 1fr; }
      .comparison-grid { grid-template-columns: 1fr; }
      .floating-cta {
        position: fixed;
        right: 0;
        top: 50%;
        transform: translateY(-50%);
      }
      .floating-cta .btn-brand {
        width: 46px;
        height: 46px;
        padding: 0;
        border-radius: 10px 0 0 10px;
      }
      .floating-cta .cta-label { display: none; }
      .floating-cta .cta-icon { font-size: 1.05rem; }
    }

    @media (max-width: 767px) {
      .doc-wrapper { border-radius: 10px; padding: 1rem 0.85rem; }
      .left-sticky-nav { padding: 0.9rem 0.8rem; }
      .doc-title h1 { font-size: 1.5rem; }
      .doc-subtitle, .doc-section p, .doc-section li { font-size: 0.96rem; }
      .benefits-grid, .comparison-grid { grid-template-columns: 1fr; }
      .cta-box { padding: 1.2rem 1.1rem; }
      .floating-cta {
        position: fixed;
        right: 0;
        top: 50%;
        transform: translateY(-50%);
        bottom: auto;
        width: auto;
      }
      .floating-cta .btn-brand {
        width: 42px;
        height: 42px;
        padding: 0;
        font-size: 0.95rem;
      }
      .floating-cta .cta-label { display: none; }
    }