/**
 * engineering theme CSS — byte-for-byte port of
 *   /Volumes/x9/claude-design/ui_kits/engineering/{index,blog,post,page}.html
 *
 * Generated by scripts/port-theme-css.py.
 *
 * NOTE: top-level `:root` and `html, body` selectors are mechanically
 * rewritten to `body[data-theme="engineering"]` so multiple theme.css
 * files can coexist in the bundle without overriding each other's
 * CSS custom properties. Other selectors (.brand, .nav-link, etc.)
 * are preserved verbatim from source — they reference var(--bg)/
 * var(--fg) which inherit from the scoped body.
 */

/* ===== engineering/index.html <style> ===== */
body[data-theme="engineering"], [data-theme="engineering"] {
    overflow-x: clip;
    --bg:           #000;
    --surface:      #0a0a0a;
    --card:         #141414;
    --card-soft:    rgba(255,255,255,0.04);
    --fg:           #ffffff;
    --muted-fg:     #94a3b8;
    --subtle-fg:    #475569;
    --border:       rgba(255,255,255,0.10);
    --border-soft:  rgba(255,255,255,0.05);
    --sky-50:       #f0f9ff;
    --sky-100:      #e0f2fe;
    --sky-300:      #7dd3fc;
    --sky-400:      #38bdf8;
    --sky-500:      #0ea5e9;
    --sky-700:      #0369a1;
    --sky-950:      #082f49;
    --sky-tint:     rgba(56,189,248,0.10);
    --sans: 'Inter', system-ui, -apple-system, sans-serif;
  }
  [data-theme="engineering"] * { box-sizing: border-box; }
  body[data-theme="engineering"], [data-theme="engineering"] {
    margin: 0; padding: 0;
    background: var(--bg); color: var(--fg);
    font-family: var(--sans);
    -webkit-font-smoothing: antialiased;
  }
  [data-theme="engineering"] a { color: inherit; text-decoration: none; }

  /* Nav */
  [data-theme="engineering"] nav.site-nav {
    position: sticky; top: 0; z-index: 50;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-soft);
    height: 64px;
  }
  [data-theme="engineering"] .nav-inner {
    max-width: 1280px; margin: 0 auto;
    height: 100%; padding: 0 24px;
    display: flex; align-items: center; justify-content: space-between;
  }
  [data-theme="engineering"] .brand {
    display: inline-flex; align-items: center; gap: 8px;
    font-weight: 700; letter-spacing: -0.02em;
    color: var(--fg);
  }
  [data-theme="engineering"] .bolt {
    width: 18px; height: 18px;
    display: inline-block;
  }
  [data-theme="engineering"] .nav-links { display: flex; gap: 32px; align-items: center; }
  [data-theme="engineering"] .nav-link {
    font-size: 14px; color: var(--muted-fg);
    transition: color 150ms;
  }
  [data-theme="engineering"] .nav-link.active { color: var(--fg); font-weight: 600; }
  [data-theme="engineering"] .nav-link:hover { color: var(--fg); }
  [data-theme="engineering"] .nav-cta {
    font-size: 13px; font-weight: 600;
    color: #0c4a6e;
    background: var(--sky-400);
    padding: 8px 18px;
    border-radius: 9999px;
    transition: background 150ms;
  }
  [data-theme="engineering"] .nav-cta:hover { background: var(--sky-300); }

  /* Hero */
  [data-theme="engineering"] .hero {
    position: relative; overflow: hidden;
    padding: 128px 24px 144px;
    background: var(--bg);
  }
  [data-theme="engineering"] .hero::before {
    content: "";
    position: absolute; inset: 0; pointer-events: none;
    background: linear-gradient(to bottom, rgba(14,165,233,0.22) 0%, transparent 60%);
  }
  [data-theme="engineering"] .hero::after {
    content: "";
    position: absolute;
    left: 50%; top: -120px;
    width: 640px; height: 640px;
    transform: translateX(-50%);
    background: radial-gradient(circle, rgba(56,189,248,0.20), transparent 60%);
    filter: blur(50px);
    pointer-events: none;
  }
  [data-theme="engineering"] .hero-inner {
    position: relative; z-index: 1;
    max-width: 880px; margin: 0 auto;
    text-align: center;
  }
  [data-theme="engineering"] .eyebrow {
    display: inline-block;
    background: var(--sky-tint);
    color: var(--sky-400);
    font-size: 11px; font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    padding: 6px 14px;
    border-radius: 9999px;
    margin-bottom: 28px;
    white-space: nowrap;
  }
  [data-theme="engineering"] .hero h1 {
    font-size: clamp(48px, 7vw, 88px);
    font-weight: 800;
    letter-spacing: -0.035em;
    line-height: 1.02;
    margin: 0;
    color: var(--fg);
  }
  [data-theme="engineering"] .hero p.lede {
    margin: 28px auto 0;
    max-width: 680px;
    font-size: 20px;
    line-height: 1.55;
    color: var(--muted-fg);
  }
  [data-theme="engineering"] .hero-ctas {
    margin-top: 44px;
    display: flex; gap: 24px;
    align-items: center; justify-content: center;
    flex-wrap: wrap;
  }
  [data-theme="engineering"] .btn-primary {
    display: inline-flex; align-items: center; gap: 8px;
    background: var(--sky-400);
    color: #0c4a6e;
    font-weight: 600; font-size: 15px;
    padding: 12px 30px;
    border-radius: 9999px;
    transition: background 150ms;
  }
  [data-theme="engineering"] .btn-primary:hover { background: var(--sky-300); }
  [data-theme="engineering"] .btn-link {
    font-size: 14px;
    color: var(--muted-fg);
    text-decoration: underline;
    text-underline-offset: 4px;
  }
  [data-theme="engineering"] .btn-link:hover { color: var(--fg); }

  /* Section */
  [data-theme="engineering"] section.wrap { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
  [data-theme="engineering"] .section-title {
    font-size: 24px; font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0 0 32px;
    color: var(--fg);
  }

  /* Featured grid */
  [data-theme="engineering"] .featured { padding: 80px 0; }
  [data-theme="engineering"] .grid-3 {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
  }
  @media (max-width: 900px) { [data-theme="engineering"] .grid-3 { grid-template-columns: 1fr; } }
  [data-theme="engineering"] .post-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 22px;
    transition: border-color 200ms;
    display: flex; flex-direction: column;
  }
  [data-theme="engineering"] .post-card:hover { border-color: rgba(56,189,248,0.30); }
  [data-theme="engineering"] .post-img {
    width: 100%; aspect-ratio: 16/9;
    border-radius: 8px;
    margin-bottom: 16px;
    background-size: cover; background-position: center;
  }
  [data-theme="engineering"] .img-1 { background-image: linear-gradient(135deg, #1e293b 0%, #0c4a6e 100%); }
  [data-theme="engineering"] .img-2 { background-image: linear-gradient(135deg, #082f49 0%, #1e3a8a 100%); }
  [data-theme="engineering"] .img-3 { background-image: linear-gradient(135deg, #1f2937 0%, #475569 100%); }
  [data-theme="engineering"] .img-4 { background-image: linear-gradient(135deg, #064e3b 0%, #022c22 100%); }
  [data-theme="engineering"] .img-5 { background-image: linear-gradient(135deg, #3b0764 0%, #1e1b4b 100%); }
  [data-theme="engineering"] .img-6 { background-image: linear-gradient(135deg, #292524 0%, #1c1917 100%); }
  [data-theme="engineering"] .tag-pill {
    display: inline-block;
    background: var(--sky-tint);
    color: var(--sky-400);
    font-size: 10px; font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 3px 9px;
    border-radius: 9999px;
  }
  [data-theme="engineering"] .post-title {
    font-size: 17px; font-weight: 700;
    color: var(--fg);
    line-height: 1.3;
    margin: 14px 0 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color 200ms;
  }
  [data-theme="engineering"] .post-card:hover .post-title { color: var(--sky-400); }
  [data-theme="engineering"] .post-meta {
    margin-top: auto;
    padding-top: 16px;
    display: flex; gap: 12px;
    font-size: 12px; color: var(--muted-fg);
  }
  [data-theme="engineering"] .post-meta::before {
    content: "";
  }

  /* About + stats 2-col */
  [data-theme="engineering"] .about { padding: 80px 0; }
  [data-theme="engineering"] .about-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 56px;
    align-items: center;
  }
  @media (max-width: 900px) { [data-theme="engineering"] .about-grid { grid-template-columns: 1fr; } }
  [data-theme="engineering"] .about h2 {
    font-size: clamp(32px, 4vw, 44px);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin: 0;
  }
  [data-theme="engineering"] .about p {
    margin: 20px 0 0;
    font-size: 16px; color: var(--muted-fg);
    line-height: 1.65;
  }
  [data-theme="engineering"] .about .learn-more {
    display: inline-flex; align-items: center; gap: 6px;
    margin-top: 24px;
    color: var(--sky-400);
    font-weight: 600; font-size: 14px;
  }
  [data-theme="engineering"] .about .learn-more:hover { text-decoration: underline; text-underline-offset: 4px; }
  [data-theme="engineering"] .stats-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
  }
  [data-theme="engineering"] .stat {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 28px 16px;
    text-align: center;
  }
  [data-theme="engineering"] .stat .num {
    font-size: 36px; font-weight: 800;
    letter-spacing: -0.04em;
    font-variant-numeric: tabular-nums;
  }
  [data-theme="engineering"] .stat .lbl {
    margin-top: 6px;
    color: var(--muted-fg);
    font-size: 13px;
  }

  /* CTA banner */
  [data-theme="engineering"] .cta-wrap { padding: 0 0 96px; }
  [data-theme="engineering"] .cta-banner {
    background: linear-gradient(135deg, #0ea5e9 0%, #0369a1 100%);
    border-radius: 16px;
    padding: 72px 48px;
    text-align: center;
    box-shadow: 0 32px 80px -24px rgba(14,165,233,0.5);
  }
  [data-theme="engineering"] .cta-banner h2 {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 800; letter-spacing: -0.03em;
    color: #ffffff; margin: 0 0 12px;
  }
  [data-theme="engineering"] .cta-banner p {
    color: var(--sky-100);
    font-size: 16px; line-height: 1.55;
    max-width: 480px; margin: 0 auto 28px;
  }
  [data-theme="engineering"] .cta-form {
    display: flex; gap: 12px; max-width: 460px; margin: 0 auto;
  }
  [data-theme="engineering"] .cta-form input {
    flex: 1; min-width: 0;
    background: rgba(255,255,255,0.18);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 9999px;
    color: #fff;
    padding: 12px 22px;
    font-size: 14px; font-family: inherit;
    outline: none;
  }
  [data-theme="engineering"] .cta-form input::placeholder { color: rgba(224,242,254,0.7); }
  [data-theme="engineering"] .cta-form input:focus { box-shadow: 0 0 0 2px rgba(255,255,255,0.4); }
  [data-theme="engineering"] .cta-form button {
    background: #fff;
    color: var(--sky-700);
    border: none;
    border-radius: 9999px;
    padding: 12px 26px;
    font-size: 14px; font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: background 150ms;
  }
  [data-theme="engineering"] .cta-form button:hover { background: var(--sky-50); }

  /* Footer */
  [data-theme="engineering"] footer.site-footer {
    background: var(--bg);
    border-top: 1px solid var(--border-soft);
    padding: 64px 24px 32px;
  }
  [data-theme="engineering"] .footer-grid {
    max-width: 1280px; margin: 0 auto;
    display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px;
  }
  @media (max-width: 700px) { [data-theme="engineering"] .footer-grid { grid-template-columns: 1fr 1fr; } }
  [data-theme="engineering"] .footer-brand {
    display: inline-flex; align-items: center; gap: 8px;
    font-weight: 700;
  }
  [data-theme="engineering"] .footer-tag {
    margin-top: 8px;
    font-size: 12px; color: var(--muted-fg);
  }
  [data-theme="engineering"] .footer-col h3 {
    font-size: 13px; font-weight: 700;
    margin: 0 0 14px;
  }
  [data-theme="engineering"] .footer-col a {
    display: block;
    color: var(--muted-fg);
    font-size: 13px;
    padding: 4px 0;
    transition: color 150ms;
  }
  [data-theme="engineering"] .footer-col a:hover { color: var(--fg); }
  [data-theme="engineering"] .copy {
    max-width: 1280px; margin: 48px auto 0;
    padding-top: 28px;
    border-top: 1px solid var(--border-soft);
    font-size: 12px; color: var(--subtle-fg);
  }

/* ===== engineering/blog.html <style> ===== */
/* === Inner page (blog/post/page) — inherits theme typography & color from body === */
  [data-theme="engineering"] .ip-wrap { max-width: 1200px; margin: 0 auto; padding: 64px clamp(16px, 4vw, 32px); }
  [data-theme="engineering"] .ip-narrow { max-width: 760px; margin: 0 auto; padding: 64px clamp(16px, 4vw, 32px); }
  [data-theme="engineering"] .ip-prose-wrap { max-width: 720px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 32px); }
  [data-theme="engineering"] .ip-eyebrow { font-size: 11px; font-weight: 600; letter-spacing: 0.18em; text-transform: uppercase; opacity: 0.55; margin: 0 0 18px; }
  [data-theme="engineering"] .ip-h1 { font-size: clamp(40px, 6vw, 72px); font-weight: 800; letter-spacing: -0.025em; line-height: 1.05; margin: 0 0 18px; text-wrap: balance; }
  [data-theme="engineering"] .ip-h1-serif { font-family: var(--vb-heading-font, var(--heading, var(--display, inherit))); font-size: clamp(40px, 5.4vw, 64px); font-weight: 600; letter-spacing: -0.015em; line-height: 1.1; margin: 0 0 18px; text-wrap: balance; }
  [data-theme="engineering"] .ip-dek { font-size: 19px; line-height: 1.55; opacity: 0.7; margin: 0 0 28px; max-width: 640px; text-wrap: pretty; }
  [data-theme="engineering"] .ip-byline { display: flex; align-items: center; gap: 14px; margin: 0 0 40px; padding: 14px 0; border-top: 1px solid color-mix(in srgb, currentColor 12%, transparent); border-bottom: 1px solid color-mix(in srgb, currentColor 12%, transparent); }
  [data-theme="engineering"] .ip-byline > div { min-width: 0; flex: 1; }
  [data-theme="engineering"] .ip-avatar { width: 40px; height: 40px; border-radius: 9999px; background: color-mix(in srgb, currentColor 12%, transparent); display: inline-flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 700; flex-shrink: 0; }
  [data-theme="engineering"] .ip-byline .author { font-size: 14px; font-weight: 600; }
  [data-theme="engineering"] .ip-byline .meta { font-size: 13px; opacity: 0.55; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  [data-theme="engineering"] .ip-cover { width: 100%; aspect-ratio: 16/9; background-size: cover; background-position: center; margin: 0 0 40px; }
  [data-theme="engineering"] .ip-prose { font-size: 18px; line-height: 1.75; }
  [data-theme="engineering"] .ip-prose p { margin: 0 0 22px; opacity: 0.92; }
  [data-theme="engineering"] .ip-prose h2 { font-size: clamp(24px, 3vw, 32px); font-weight: 700; letter-spacing: -0.015em; line-height: 1.2; margin: 40px 0 16px; }
  [data-theme="engineering"] .ip-prose h3 { font-size: clamp(20px, 2.4vw, 24px); font-weight: 700; margin: 32px 0 12px; }
  [data-theme="engineering"] .ip-prose blockquote { margin: 28px 0; padding: 4px 0 4px 22px; border-left: 3px solid color-mix(in srgb, currentColor 35%, transparent); font-style: italic; font-size: 21px; line-height: 1.5; opacity: 0.78; }
  [data-theme="engineering"] .ip-prose ul, [data-theme="engineering"] .ip-prose ol { margin: 0 0 22px; padding-left: 22px; }
  [data-theme="engineering"] .ip-prose li { margin: 0 0 8px; opacity: 0.92; line-height: 1.7; }
  [data-theme="engineering"] .ip-prose code:not(pre code) { font-family: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace; font-size: 0.88em; background: color-mix(in srgb, currentColor 8%, transparent); padding: 1px 6px; border-radius: 4px; }
  [data-theme="engineering"] .ip-prose pre { font-family: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace; background: color-mix(in srgb, currentColor 4%, transparent); border: 1px solid color-mix(in srgb, currentColor 12%, transparent); border-radius: 8px; padding: 16px 18px; overflow-x: auto; font-size: 14px; line-height: 1.65; margin: 22px 0; }
  [data-theme="engineering"] .ip-prose hr { border: none; height: 1px; background: color-mix(in srgb, currentColor 14%, transparent); margin: 36px 0; }
  [data-theme="engineering"] .ip-tags { display: flex; gap: 8px; flex-wrap: wrap; margin: 32px 0 0; }
  [data-theme="engineering"] .ip-tag { font-size: 11px; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; padding: 5px 12px; border: 1px solid color-mix(in srgb, currentColor 22%, transparent); border-radius: 9999px; opacity: 0.7; text-decoration: none; color: inherit; white-space: nowrap; }
  [data-theme="engineering"] .ip-tag:hover { opacity: 1; }
  /* Blog index */
  [data-theme="engineering"] .ip-index-head { margin: 0 0 40px; padding-bottom: 24px; border-bottom: 1px solid color-mix(in srgb, currentColor 12%, transparent); }
  [data-theme="engineering"] .ip-filters { display: flex; gap: 8px; flex-wrap: wrap; margin: 18px 0 0; }
  [data-theme="engineering"] .ip-filter { font-size: 12px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; padding: 6px 14px; border: 1px solid color-mix(in srgb, currentColor 18%, transparent); border-radius: 9999px; text-decoration: none; color: inherit; opacity: 0.7; white-space: nowrap; }
  [data-theme="engineering"] .ip-filter:hover { opacity: 1; border-color: color-mix(in srgb, currentColor 32%, transparent); }
  [data-theme="engineering"] .ip-filter.active { background: color-mix(in srgb, currentColor 14%, transparent); border-width: 2px; padding: 5px 13px; opacity: 1; font-weight: 700; }
  [data-theme="engineering"] .ip-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
  @media (max-width: 900px) { [data-theme="engineering"] .ip-grid { grid-template-columns: 1fr 1fr; } }
  @media (max-width: 600px) { [data-theme="engineering"] .ip-grid { grid-template-columns: 1fr; } }
  [data-theme="engineering"] .ip-card { display: block; border: 1px solid color-mix(in srgb, currentColor 12%, transparent); border-radius: 8px; overflow: hidden; text-decoration: none; color: inherit; transition: border-color 200ms, transform 200ms; }
  [data-theme="engineering"] .ip-card:hover { border-color: color-mix(in srgb, currentColor 30%, transparent); transform: translateY(-2px); }
  [data-theme="engineering"] .ip-card .img { width: 100%; aspect-ratio: 16/10; background-size: cover; background-position: center; }
  [data-theme="engineering"] .ip-card .body { padding: 18px 20px 20px; }
  [data-theme="engineering"] .ip-card .kicker { font-size: 11px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; opacity: 0.6; margin: 0 0 8px; }
  [data-theme="engineering"] .ip-card h3 { font-size: 18px; font-weight: 700; letter-spacing: -0.01em; line-height: 1.3; margin: 0 0 8px; }
  [data-theme="engineering"] .ip-card p { font-size: 14px; line-height: 1.55; opacity: 0.7; margin: 0 0 12px; }
  [data-theme="engineering"] .ip-card .meta { font-size: 12px; opacity: 0.55; }
  [data-theme="engineering"] .ip-pag { display: flex; align-items: center; justify-content: center; gap: 8px; margin: 56px 0 0; }
  [data-theme="engineering"] .ip-pag a, [data-theme="engineering"] .ip-pag span { min-width: 36px; height: 36px; padding: 0 12px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid color-mix(in srgb, currentColor 16%, transparent); border-radius: 6px; text-decoration: none; color: inherit; font-size: 13px; font-weight: 600; }
  [data-theme="engineering"] .ip-pag .current { background: color-mix(in srgb, currentColor 12%, transparent); }
  /* Inline newsletter CTA — outline style, no blend tricks */
  [data-theme="engineering"] .ip-inline-cta { margin: 56px 0 0; padding: 36px; border: 1px solid color-mix(in srgb, currentColor 14%, transparent); border-radius: 12px; text-align: center; }
  [data-theme="engineering"] .ip-inline-cta h3 { font-size: 22px; font-weight: 700; letter-spacing: -0.01em; margin: 0 0 8px; }
  [data-theme="engineering"] .ip-inline-cta p { font-size: 14px; opacity: 0.7; margin: 0 0 18px; }
  [data-theme="engineering"] .ip-inline-cta form { display: flex; gap: 8px; max-width: 380px; margin: 0 auto; }
  [data-theme="engineering"] .ip-inline-cta input { flex: 1; min-width: 0; background: transparent; border: 1px solid color-mix(in srgb, currentColor 22%, transparent); border-radius: 8px; color: inherit; font-family: inherit; font-size: 14px; padding: 10px 14px; outline: none; }
  [data-theme="engineering"] .ip-inline-cta button { background: transparent; border: 2px solid currentColor; border-radius: 8px; color: inherit; font-family: inherit; font-size: 13px; font-weight: 700; letter-spacing: 0.04em; padding: 9px 22px; cursor: pointer; white-space: nowrap; transition: background 150ms; }
  [data-theme="engineering"] .ip-inline-cta button:hover { background: color-mix(in srgb, currentColor 10%, transparent); }
  /* Comments */
  [data-theme="engineering"] .ip-comments { margin: 64px 0 0; padding-top: 32px; border-top: 1px solid color-mix(in srgb, currentColor 14%, transparent); }
  [data-theme="engineering"] .ip-comments h3 { font-size: 18px; font-weight: 700; margin: 0 0 24px; }
  [data-theme="engineering"] .ip-comment { display: flex; gap: 14px; padding: 18px 0; border-bottom: 1px solid color-mix(in srgb, currentColor 8%, transparent); }
  [data-theme="engineering"] .ip-comment > div { min-width: 0; flex: 1; }
  [data-theme="engineering"] .ip-comment:last-child { border-bottom: none; }
  [data-theme="engineering"] .ip-comment .who { font-size: 13px; font-weight: 600; }
  [data-theme="engineering"] .ip-comment .when { font-size: 12px; opacity: 0.55; }
  [data-theme="engineering"] .ip-comment .text { font-size: 14px; line-height: 1.55; opacity: 0.85; margin: 6px 0 0; }
  /* Back link */
  [data-theme="engineering"] .ip-back { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 600; letter-spacing: 0.04em; text-decoration: none; color: inherit; opacity: 0.65; margin: 0 0 24px; white-space: nowrap; }
  [data-theme="engineering"] .ip-back:hover { opacity: 1; }
  /* Static page form */
  [data-theme="engineering"] .ip-form { max-width: 520px; margin: 32px 0 0; }
  [data-theme="engineering"] .ip-form label { display: block; font-size: 12px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; opacity: 0.7; margin: 0 0 6px; }
  [data-theme="engineering"] .ip-form .row { margin: 0 0 16px; }
  [data-theme="engineering"] .ip-form input, [data-theme="engineering"] .ip-form textarea { width: 100%; background: transparent; border: 1px solid color-mix(in srgb, currentColor 20%, transparent); border-radius: 8px; color: inherit; font-family: inherit; font-size: 15px; padding: 10px 14px; outline: none; }
  [data-theme="engineering"] .ip-form textarea { min-height: 120px; resize: vertical; }
  [data-theme="engineering"] .ip-form button { background: transparent; border: 2px solid currentColor; border-radius: 8px; color: inherit; font-family: inherit; font-size: 14px; font-weight: 700; letter-spacing: 0.04em; padding: 10px 24px; cursor: pointer; white-space: nowrap; transition: background 150ms; }
  [data-theme="engineering"] .ip-form button:hover { background: color-mix(in srgb, currentColor 10%, transparent); }

/* ===== Responsive overhaul (Sprint K Phase 3 Batch B) ===== */
@media (max-width: 1023px) {
  [data-theme="engineering"] .nav-links { display: none; }
}

/* ===== Bespoke mobile drawer (Old-30 Bespoke Parity, Wave 2) ===== */
[data-theme="engineering"] .en-hamburger {
  display: none;
  width: 40px;
  height: 40px;
  place-items: center;
  background: none;
  border: none;
  color: var(--fg);
  cursor: pointer;
  border-radius: 8px;
}
[data-theme="engineering"] .en-hamburger:hover { background: var(--card); }
@media (max-width: 1023px) {
  [data-theme="engineering"] .en-hamburger { display: grid; }
}

/* ===== Bespoke shop (Old-30 Bespoke Parity, Wave 2) ===== */
[data-theme="engineering"] .en-shop-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 900px) {
  [data-theme="engineering"] .en-shop-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  [data-theme="engineering"] .en-shop-grid { grid-template-columns: 1fr; }
}
[data-theme="engineering"] .en-shop-card {
  display: block;
  text-decoration: none;
  color: inherit;
  border-radius: 12px;
  padding: 12px;
  margin: -12px;
  border: 1px solid transparent;
  transition: border-color 200ms, transform 200ms;
}
[data-theme="engineering"] .en-shop-card:hover {
  border-color: var(--sky-400);
  transform: translateY(-2px);
}
[data-theme="engineering"] .en-pill,
[data-theme="engineering"] .en-pill-active {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}
[data-theme="engineering"] .en-pill { color: var(--muted-fg); background: var(--card); }
[data-theme="engineering"] .en-pill:hover { color: var(--fg); border-color: var(--sky-400); }
[data-theme="engineering"] .en-pill-active { color: var(--sky-400); background: var(--sky-tint); border-color: var(--sky-400); }
[data-theme="engineering"] .en-add-to-cart {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 11px 20px;
  border-radius: 9999px;
  border: none;
  background: var(--sky-400);
  color: #001018;
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
}
[data-theme="engineering"] .en-cart-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--fg);
  text-decoration: none;
}
[data-theme="engineering"] .en-cart-badge {
  position: absolute;
  top: -6px;
  inset-inline-end: -8px;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  border-radius: 999px;
  background: var(--sky-400);
  color: #001018;
  font-size: 10px;
  font-weight: 700;
  display: grid;
  place-items: center;
}
@media (max-width: 640px) {
  [data-theme="engineering"] .en-product-grid { grid-template-columns: 1fr !important; }
}

/* ===== Page-builder block token bridge ===== */
/* Maps generic --vb-* renderer variables to this theme's own CSS custom properties */
[data-theme="engineering"] main {
  --vb-color-bg:        var(--bg);
  --vb-color-surface:   var(--surface);
  --vb-color-primary:   var(--sky-500);
  /* --vb-color-primary-fg: was missing — --sky-500 vs hardcoded white
     button text is only ~2.8:1 contrast (P-094 recurrence, below the
     3:1 WCAG non-text/UI-component floor). --bg (pure black on this
     theme) pairs at ~7.6:1. */
  --vb-color-primary-fg: var(--bg);
  --vb-color-secondary: var(--sky-300);
  --vb-color-text:      var(--fg);
  --vb-color-muted:     var(--sky-300);
  --vb-color-border:    var(--sky-tint);
  --vb-heading-font:    var(--sans);
  --vb-body-font:       var(--sans);
  --vb-radius:          6px;
  --vb-spacing-unit:    1rem;
}