/* Design tokens — colors matched to live turbocoreai.com */
  :root {
    --navy: #012340;
    --navy-hover: #001628;
    --blue: #2b7fff;
    --blue-hover: #1e5fd6;
    --ink: #070707;
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --green: #22c55e;
    --amber: #f59e0b;
    --pillar-bg: rgba(43, 127, 255, 0.08);
    --font: 'Inter', 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    --blue-text: #2268d1;
    --blue-text-hover: #194da3;
    --focus: 3px solid var(--blue);
  }
  *, *::before, *::after { box-sizing: border-box; }
  html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
  body {
    margin: 0;
    font-family: var(--font);
    font-size: 18px;
    line-height: 1.6;
    color: var(--ink);
    background: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: 'ss01', 'cv11';
  }
  h1, h2, h3, h4, h5, h6 { color: var(--navy); margin: 0; font-family: var(--font); }
  h1 { font-size: 40px; font-weight: 800; line-height: 1.12; letter-spacing: -0.022em; }
  h2 { font-size: 30px; font-weight: 700; line-height: 1.22; letter-spacing: -0.012em; }
  h3 { font-size: 24px; font-weight: 600; line-height: 1.3; }
  h4 { font-size: 20px; font-weight: 600; line-height: 1.35; }
  p { margin: 0 0 24px; }
  a { color: var(--blue-text); text-decoration: none; transition: color 0.15s ease; }
  a:hover, a:focus { color: var(--blue-text-hover); }
  a:focus-visible { outline: var(--focus); outline-offset: 2px; border-radius: 2px; }
  img { max-width: 100%; height: auto; display: block; }
  button { font-family: inherit; }
  .sr-only {
    position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
  }
  .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

  /* Buttons */
  .btn {
    display: inline-flex; align-items: center; justify-content: center;
    gap: 8px; padding: 12px 22px; border-radius: 8px;
    font-size: 15px; font-weight: 600; min-height: 44px;
    line-height: 1; border: 2px solid transparent; cursor: pointer;
    transition: all 0.15s ease; text-decoration: none; white-space: nowrap;
  }
  .btn-primary {
    background: var(--blue); color: var(--white); border-color: var(--blue);
  }
  .btn-primary:hover {
    background: var(--blue-hover); border-color: var(--blue-hover);
    color: var(--white); transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(43,127,255,0.25);
  }
  .btn-secondary {
    background: transparent; color: var(--blue); border-color: var(--blue);
  }
  .btn-secondary:hover {
    background: rgba(43,127,255,0.08); color: var(--blue-hover); border-color: var(--blue-hover);
  }
  .btn-dark {
    background: var(--navy); color: var(--white); border-color: var(--navy);
  }
  .btn-dark:hover {
    background: var(--navy-hover); border-color: var(--navy-hover);
    color: var(--white); transform: translateY(-1px);
  }
  .btn:focus-visible { outline: var(--focus); outline-offset: 2px; }
  .btn-lg { padding: 14px 28px; font-size: 16px; min-height: 50px; }

  /* Pillar tag */
  .pillar-tag {
    display: inline-block; padding: 4px 10px;
    background: var(--gray-100); color: var(--gray-600);
    font-size: 10px; font-weight: 600; letter-spacing: 0.08em;
    text-transform: uppercase; border-radius: 4px;
    text-decoration: none; line-height: 1.4;
    transition: all 0.15s ease;
  }
  .pillar-tag:hover { background: rgba(43,127,255,0.1); color: var(--blue); }

  /* Audience tag */
  .audience-tag {
    display: inline-block; padding: 3px 9px;
    border-radius: 4px; font-size: 10px; font-weight: 600;
    letter-spacing: 0.06em; text-transform: uppercase;
    line-height: 1.5; text-decoration: none;
    transition: all 0.15s ease;
  }
  .audience-tag.qa {
    background: #eef7ee; color: #3d7a3d;
    border: 1px solid #d4ead4;
  }
  .audience-tag.qa:hover { background: rgba(43,127,255,0.1); color: var(--blue); border-color: rgba(43,127,255,0.2); }
  .audience-tag.it {
    background: #f3eef8; color: #6b5298;
    border: 1px solid #e0d4f0;
  }
  .audience-tag.it:hover { background: rgba(43,127,255,0.1); color: var(--blue); border-color: rgba(43,127,255,0.2); }
  .tag-row { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }

  /* Avatar (initials in circle) */
  .avatar {
    border-radius: 50%; color: var(--white);
    display: inline-flex; align-items: center; justify-content: center;
    font-weight: 600; flex-shrink: 0; overflow: hidden; letter-spacing: 0.01em;
  }
  .avatar-xs { width: 28px; height: 28px; font-size: 11px; }
  .avatar-sm { width: 32px; height: 32px; font-size: 12px; }
  .avatar-md { width: 40px; height: 40px; font-size: 14px; }
  .avatar-lg { width: 64px; height: 64px; font-size: 22px; }
  .avatar.a-ra { background: linear-gradient(135deg, #012340 0%, #2b7fff 100%); }
  .avatar.a-ns { background: linear-gradient(135deg, #012340 0%, #7c3aed 100%); }
  .avatar.a-ps { background: linear-gradient(135deg, #012340 0%, #0b8f87 100%); }
  .avatar.a-aa { background: linear-gradient(135deg, #012340 0%, #f59e0b 100%); }

  /* Top nav */
  .nav {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255,255,255,0.97); backdrop-filter: saturate(180%) blur(8px);
    border-bottom: 1px solid var(--gray-200); height: 64px;
  }
  .nav-inner {
    max-width: 1200px; height: 100%; margin: 0 auto; padding: 0 24px;
    display: flex; align-items: center; gap: 32px;
  }
  .nav-logo-wrap { display: flex; align-items: center; text-decoration: none; flex-shrink: 0; }
  .nav-logo { height: 32px; width: auto; }
  .nav-links {
    display: flex; gap: 28px; list-style: none; margin: 0; padding: 0;
    flex: 1; align-items: center;
  }
  .nav-links a {
    color: var(--navy); font-weight: 500; font-size: 15px;
    padding: 6px 0; position: relative;
  }
  .nav-links a.active { color: var(--blue-text); font-weight: 600; }
  .nav-links a.active::after {
    content: ''; position: absolute; bottom: -22px; left: 0; right: 0;
    height: 2px; background: var(--blue-text);
  }
  .nav-links a:hover { color: var(--blue); }
  .nav-cta { margin-left: auto; flex-shrink: 0; }
  .nav-mobile-toggle {
    display: none; background: transparent; border: none; cursor: pointer;
    padding: 8px; margin-left: auto; color: var(--navy);
  }
  .nav-mobile-toggle svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 2; }

  /* Subscribe module */
  .subscribe-module {
    background: var(--gray-50); border: 1px solid var(--gray-200);
    border-radius: 12px; padding: 32px;
  }
  .subscribe-module h3 { margin-bottom: 6px; font-size: 22px; }
  .subscribe-module p { color: var(--gray-600); font-size: 16px; margin: 0 0 20px; line-height: 1.5; }
  .subscribe-form { display: flex; gap: 10px; max-width: 520px; }
  .subscribe-form input[type="email"] {
    flex: 1; min-width: 0; padding: 12px 16px;
    border: 1px solid var(--gray-300); border-radius: 8px;
    font-family: inherit; font-size: 15px; min-height: 44px;
    color: var(--ink); background: var(--white);
  }
  .subscribe-form input[type="email"]:focus {
    outline: var(--focus); outline-offset: 0; border-color: var(--blue);
  }

  /* Footer */
  .footer {
    background: var(--navy); color: rgba(255,255,255,0.8);
    padding: 64px 0 32px; margin-top: 96px;
  }
  .footer-inner { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
  .footer-cols {
    display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px; margin-bottom: 48px;
  }
  .footer-col h4 {
    color: var(--white); font-size: 12px; font-weight: 700;
    letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 18px;
  }
  .footer-col ul { list-style: none; padding: 0; margin: 0; }
  .footer-col li { margin-bottom: 12px; }
  .footer-col a { color: rgba(255,255,255,0.75); font-size: 15px; }
  .footer-col a:hover { color: var(--white); }
  .footer-logo { height: 40px; width: auto; margin-bottom: 20px; }
  .footer-tagline { font-size: 14px; line-height: 1.55; color: rgba(255,255,255,0.6); max-width: 320px; margin: 0; }
  .footer-bottom {
    padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.1);
    display: flex; justify-content: space-between; align-items: center;
    flex-wrap: wrap; gap: 16px; font-size: 13px; color: rgba(255,255,255,0.5);
  }
  .footer-bottom-links { display: flex; gap: 24px; flex-wrap: wrap; }
  .footer-bottom-links a { color: rgba(255,255,255,0.7); }

  /* Mobile nav behavior (toggle-based) */
  @media (max-width: 1023px) {
    .nav-links { display: none; }
    .nav-cta { display: none; }
    .nav-mobile-toggle { display: block; }
    .nav.open .nav-links {
      display: flex; flex-direction: column; gap: 0;
      position: absolute; top: 100%; left: 0; right: 0;
      background: var(--white); border-bottom: 1px solid var(--gray-200);
      padding: 16px 24px;
    }
    .nav.open .nav-links a { padding: 12px 0; border-bottom: 1px solid var(--gray-100); }
    .nav.open .nav-links li:last-child a { border-bottom: none; }
    .nav.open .nav-cta {
      display: flex; position: absolute; top: 100%;
      left: 0; right: 0; padding: 16px 24px;
      background: var(--white); border-bottom: 1px solid var(--gray-200);
      margin-top: calc(5 * 44px + 32px); /* below the links panel */
    }
    .nav.open .nav-cta .btn { width: 100%; }
    .footer-cols { grid-template-columns: 1fr 1fr; gap: 32px 24px; }
  }

  /* Post card (shared across homepage grid and article related posts) */
  .post-card {
    background: var(--white); border: 1px solid var(--gray-200);
    border-radius: 12px; overflow: hidden;
    text-decoration: none; color: var(--ink);
    display: flex; flex-direction: column;
    transition: all 0.2s ease;
  }
  .post-card:hover {
    transform: translateY(-3px); box-shadow: 0 14px 36px rgba(1,35,64,0.08);
    border-color: var(--gray-300); color: var(--ink);
  }
  .post-card-image {
    aspect-ratio: 16/9; position: relative; overflow: hidden;
  }
  .post-card-image::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(ellipse at 70% 30%, rgba(255,255,255,0.15), transparent 50%);
  }
  .pillar-release-velocity { background: linear-gradient(135deg, #012340 0%, #1e5fd6 100%); }
  .pillar-enterprise-ai { background: linear-gradient(135deg, #012340 0%, #5b3fb3 100%); }
  .pillar-human-side { background: linear-gradient(135deg, #012340 0%, #0b8f87 100%); }
  .pillar-evidence-proof { background: linear-gradient(135deg, #012340 0%, #059669 100%); }
  .pillar-future-change { background: linear-gradient(135deg, #012340 0%, #b45309 100%); }
  .post-card-content {
    padding: 24px; flex: 1; display: flex; flex-direction: column;
  }
  .post-card .tag-row { align-self: flex-start; margin-bottom: 14px; }
  .post-card .pillar-tag { align-self: flex-start; }
  .post-card h3 {
    font-size: 20px; font-weight: 600; line-height: 1.35;
    margin-bottom: 8px; color: var(--navy);
  }
  .post-card .excerpt {
    font-size: 15px; color: var(--gray-600); line-height: 1.45;
    margin: 0 0 20px;
    display: -webkit-box; -webkit-line-clamp: 2; line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden;
  }
  .post-card-meta {
    display: flex; align-items: center; gap: 10px; margin-top: auto;
    font-size: 13px; color: var(--gray-500);
  }
  .post-card-meta .author-name { color: var(--navy); font-weight: 500; }
  .post-card-meta .dot { color: var(--gray-300); }

  @media (max-width: 767px) {
    h1 { font-size: 32px; }
    h2 { font-size: 26px; }
    h3 { font-size: 22px; }
    body { font-size: 17px; }
    .nav { height: 56px; }
    .nav-logo { height: 28px; }
    .subscribe-module { padding: 24px; }
    .subscribe-form { flex-direction: column; gap: 10px; }
    .subscribe-form .btn { width: 100%; }
    .footer { padding: 48px 0 24px; margin-top: 64px; }
    .footer-cols { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; align-items: flex-start; }
  }


  /* Homepage header */
  /* Hero wrapper — dark navy matching turbocoreai.com homepage */
  .hero-wrap {
    background:
      radial-gradient(ellipse at 20% 20%, rgba(43,127,255,0.18), transparent 50%),
      radial-gradient(ellipse at 80% 80%, rgba(124,58,237,0.12), transparent 50%),
      linear-gradient(180deg, #012340 0%, #011e38 70%, #021d33 100%);
    padding-bottom: 40px;
    border-bottom: none;
    margin-bottom: 0;
  }

  .blog-label {
    display: inline-flex; align-items: center; gap: 7px;
    padding: 6px 16px; border-radius: 100px;
    background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.15);
    font-size: 12px; font-weight: 700; letter-spacing: 0.1em;
    text-transform: uppercase; color: rgba(255,255,255,0.85);
    margin-bottom: 20px;
  }
  .blog-label svg { width: 14px; height: 14px; fill: none; stroke: var(--blue); stroke-width: 2; }

  .page-header { padding: 72px 0 32px; text-align: center; }
  .page-header h1 { margin-bottom: 14px; color: var(--white); }
  .page-header .subtitle {
    font-size: 20px; color: rgba(255,255,255,0.7); margin: 0 auto; max-width: 680px; line-height: 1.5;
  }

  /* Pillar filter row */
.pillar-filter-wrap {
  border-bottom: 1px solid var(--gray-200);
  margin-bottom: 56px;
  position: relative;
  top: auto;
  z-index: auto;
  background: transparent;
  backdrop-filter: none;
}
  .pillar-filters {
    display: flex; gap: 8px; padding: 18px 0;
    overflow-x: auto; scrollbar-width: none; max-width: 1200px;
    margin: 0 auto; padding-left: 24px; padding-right: 24px;
  }
  .pillar-filters::-webkit-scrollbar { display: none; }
  .pillar-filter {
    padding: 8px 16px; background: transparent;
    border: 1px solid var(--gray-200); border-radius: 100px;
    font-size: 14px; font-weight: 500; color: var(--navy);
    cursor: pointer; white-space: nowrap; text-decoration: none;
    transition: all 0.15s ease; font-family: inherit;
  }
  .pillar-filter.active {
    background: var(--navy); color: var(--white); border-color: var(--navy);
  }
  .pillar-filter:hover:not(.active) {
    background: var(--gray-50); border-color: var(--gray-300); color: var(--navy-hover);
  }

  /* Featured post */
  .featured-post {
    display: grid; grid-template-columns: 1.05fr 1fr; gap: 0;
    background: var(--gray-50); border: 1px solid var(--gray-200);
    border-radius: 16px; overflow: hidden;
    margin-bottom: 72px; text-decoration: none; color: inherit;
    transition: box-shadow 0.2s ease, transform 0.2s ease;
  }
  .featured-post:hover {
    box-shadow: 0 16px 48px rgba(1,35,64,0.09); transform: translateY(-2px);
  }
  .featured-post-image {
    position: relative; min-height: 320px; aspect-ratio: 16/10;
    background:
      radial-gradient(ellipse at 20% 20%, rgba(43,127,255,0.35), transparent 50%),
      radial-gradient(ellipse at 80% 80%, rgba(124,58,237,0.25), transparent 50%),
      linear-gradient(135deg, #012340 0%, #0a3a6e 100%);
    overflow: hidden;
  }
  .featured-post-image::after {
    content: 'FEATURED'; position: absolute;
    top: 20px; left: 20px;
    background: var(--amber); color: #1a1205;
    padding: 4px 12px; border-radius: 4px;
    font-size: 10px; font-weight: 800; letter-spacing: 0.12em;
  }
  .featured-post-image svg { position: absolute; inset: 0; margin: auto; width: 60%; max-width: 320px; opacity: 0.7; }
  .featured-post-content {
    padding: 48px 44px; display: flex; flex-direction: column; justify-content: center;
  }
  .featured-post-content .tag-row { margin-bottom: 18px; align-self: flex-start; }
  .featured-post-content .pillar-tag { align-self: flex-start; }
  .featured-post-content h2 {
    font-size: 30px; margin-bottom: 16px; color: var(--navy);
    letter-spacing: -0.015em;
  }
  .featured-post-content .excerpt {
    color: var(--gray-600); margin: 0 0 28px; line-height: 1.6; font-size: 17px;
  }
  .featured-post-meta {
    display: flex; align-items: center; gap: 12px;
    font-size: 14px; color: var(--gray-500); margin-top: auto;
  }
  .featured-post-meta .dot { color: var(--gray-300); }

  /* Post grid */
  .post-grid {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 32px; margin-bottom: 48px;
  }
  .post-card-abstract {
    position: absolute; inset: 0;
    display: flex; align-items: center; justify-content: center;
    font-size: 54px; font-weight: 800; color: rgba(255,255,255,0.12);
    letter-spacing: -0.04em;
  }

  /* Pagination */
  .pagination {
    display: flex; justify-content: center; align-items: center;
    gap: 4px; margin: 8px 0 24px; padding: 0;
    list-style: none;
  }
  .pagination a, .pagination span {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: 40px; height: 40px; padding: 0 6px;
    border-radius: 8px; font-size: 14px; font-weight: 500;
    color: var(--gray-600); text-decoration: none;
    border: 1px solid transparent;
    transition: all 0.15s ease;
  }
  .pagination a:hover {
    background: var(--gray-50); border-color: var(--gray-200); color: var(--navy);
  }
  .pagination .active {
    background: var(--navy); color: var(--white);
    border-color: var(--navy); font-weight: 600;
  }
  .pagination .ellipsis { color: var(--gray-400); cursor: default; }
  .pagination .prev, .pagination .next { font-size: 13px; gap: 4px; padding: 0 12px; }
  .pagination .prev svg, .pagination .next svg {
    width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 2;
  }
  .pagination .disabled { color: var(--gray-300); pointer-events: none; }

  /* Subscribe band */
  .subscribe-band {
    background: var(--gray-50); border-top: 1px solid var(--gray-200);
    border-bottom: 1px solid var(--gray-200);
    padding: 72px 0; margin-top: 64px;
  }
  .subscribe-band-inner {
    max-width: 1200px; margin: 0 auto; padding: 0 24px;
    display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center;
  }
  .subscribe-band h2 { font-size: 30px; margin-bottom: 10px; letter-spacing: -0.015em; }
  .subscribe-band p { color: var(--gray-600); margin: 0; line-height: 1.55; }
  .subscribe-band .subscribe-form { max-width: 100%; }

  /* Audience cards */
  .audience-cards {
    max-width: 1200px; margin: 0 auto; padding: 0 24px 40px;
  }
  .audience-cards-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 20px;
  }
  .audience-card {
    display: flex; align-items: flex-start; gap: 20px;
    padding: 28px 28px; border-radius: 14px;
    border: 1px solid rgba(255,255,255,0.12); background: var(--white);
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    text-decoration: none; color: var(--ink);
    transition: all 0.2s ease; cursor: pointer;
  }
  .audience-card:hover {
    border-color: var(--blue); box-shadow: 0 8px 32px rgba(43,127,255,0.2);
    transform: translateY(-2px);
  }
  .audience-card-icon {
    width: 52px; height: 52px; border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0; font-size: 24px;
  }
  .audience-card-icon.qa { background: rgba(61,122,61,0.1); }
  .audience-card-icon.it { background: rgba(107,82,152,0.1); }
  .audience-card h3 {
    font-size: 18px; font-weight: 700; margin: 0 0 6px; color: var(--navy);
  }
  .audience-card p {
    font-size: 14px; color: var(--gray-600); margin: 0; line-height: 1.5;
  }
  .audience-card .card-arrow {
    margin-left: auto; color: var(--gray-300);
    transition: color 0.15s, transform 0.15s; flex-shrink: 0; align-self: center;
  }
  .audience-card:hover .card-arrow { color: var(--blue); transform: translateX(3px); }

  /* Role selector on subscribe forms */
  .role-selector {
    display: flex; gap: 12px; margin-bottom: 14px; flex-wrap: wrap;
  }
  .role-selector label {
    display: flex; align-items: center; gap: 7px;
    font-size: 14px; color: var(--gray-600); cursor: pointer;
    padding: 8px 14px; border: 1px solid var(--gray-200);
    border-radius: 8px; transition: all 0.15s ease;
    background: var(--white);
  }
  .role-selector label:hover { border-color: var(--blue); color: var(--navy); }
  .role-selector input[type="radio"] {
    accent-color: var(--blue); width: 16px; height: 16px; margin: 0;
  }
  .role-selector input[type="radio"]:checked + span { color: var(--navy); font-weight: 500; }
  .role-selector label:has(input:checked) {
    border-color: var(--blue); background: rgba(43,127,255,0.05);
  }

  /* Responsive breakpoints */
  @media (max-width: 1023px) {
    .post-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
    .featured-post { grid-template-columns: 1fr; }
    .featured-post-image { aspect-ratio: 16/9; min-height: 0; }
    .featured-post-content { padding: 32px 28px; }
    .subscribe-band-inner { grid-template-columns: 1fr; gap: 24px; }
    .pillar-filter-wrap { top: 64px; }
  }
  @media (max-width: 767px) {
    .post-grid { grid-template-columns: 1fr; gap: 24px; }
    .featured-post-content h2 { font-size: 24px; }
    .page-header { padding: 48px 0 28px; }
    .pillar-filter-wrap { top: 56px; }
    .subscribe-band { padding: 48px 0; }
    .subscribe-band h2 { font-size: 26px; }
    .featured-post { margin-bottom: 48px; }
    .audience-cards-grid { grid-template-columns: 1fr; gap: 14px; }
    .audience-card { padding: 22px 20px; gap: 16px; }
    .audience-card-icon { width: 44px; height: 44px; font-size: 20px; }
    .role-selector { flex-direction: column; gap: 8px; }
  }