/* ================================================================
   BLOOMFIELD DESIGN SYSTEM
   Shared CSS for getbloomfield.com

   Sections:
   1.  Design Tokens (CSS Variables)
   2.  Reset & Base
   3.  Typography
   4.  Layout
   5.  Navigation
   6.  Buttons
   7.  Cards
   8.  Section Themes
   9.  Article / Blog Body
   10. Field Notes / Blog Index
   11. Form Styles
   12. Footer
   13. Animations & Reveal
   14. Effects (Grain, Grid, Glow, Status)
   15. Scrollbar
   16. Utility Classes
   17. Responsive Breakpoints
   ================================================================ */


/* ================================================================
   0. FONT FACES
   ================================================================ */
@font-face {
  font-family: 'GT Sectra';
  src: url('/fonts/gt-sectra-book.woff') format('woff');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'GT Sectra';
  src: url('/fonts/gt-sectra-bold.woff') format('woff');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'GT Sectra';
  src: url('/fonts/gt-sectra-black.woff') format('woff');
  font-weight: 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Sohne';
  src: url('/fonts/sohne-buch.otf') format('opentype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Sohne';
  src: url('/fonts/sohne-kraftig.otf') format('opentype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Sohne';
  src: url('/fonts/sohne-halbfett.otf') format('opentype');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

/* ================================================================
   1. DESIGN TOKENS
   ================================================================ */
:root {
  /* --- Colors: Dark theme --- */
  --bg-dark: #0a0a14;
  --bg-dark-alt: #12122a;
  --bg-dark-mid: #1a1a3e;
  --text-dark: #edeae4;
  --text-dim-dark: #8a8780;
  --text-dim-dark-70: rgba(237, 234, 228, 0.7);
  --border-dark: rgba(237, 234, 228, 0.08);
  --border-hover-dark: rgba(237, 234, 228, 0.18);
  --card-bg-dark: rgba(10, 10, 20, 0.6);
  --grid-dark: rgba(74, 144, 217, 0.04);
  --hover-dark: rgba(74, 144, 217, 0.03);

  /* --- Colors: Light / Paper theme --- */
  --bg-paper: #fff1e0;
  --bg-light: #f2f0eb;
  --bg-cream: #f2f0eb;
  --text-light: #1a1a2e;
  --text-dim-light: rgba(26, 26, 46, 0.6);
  --text-dim-light-70: rgba(26, 26, 46, 0.7);
  --text-dim-light-80: rgba(26, 26, 46, 0.8);
  --border-light: rgba(26, 26, 46, 0.1);
  --border-hover-light: rgba(26, 26, 46, 0.22);
  --card-bg-light: rgba(255, 255, 255, 0.5);
  --grid-light: rgba(74, 144, 217, 0.04);
  --hover-light: rgba(74, 144, 217, 0.04);

  /* --- Colors: Shared accents --- */
  --accent: #4A90D9;
  --accent-dim: #3A78BF;
  --accent-glow: rgba(74, 144, 217, 0.25);
  --accent-border: rgba(74, 144, 217, 0.3);
  --green: #4ADE80;
  --green-glow: rgba(74, 222, 128, 0.4);
  --link-blue: #2a6cb6;

  /* --- Typography --- */
  --font-head: 'GT Sectra', Georgia, 'Times New Roman', serif;
  --font-body: 'Sohne', 'Inter', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  /* Legacy aliases used across pages */
  --serif: 'GT Sectra', Georgia, 'Times New Roman', serif;
  --mono: 'IBM Plex Mono', monospace;

  /* --- Spacing --- */
  --section-pad: 6rem;
  --section-pad-lg: 8rem;
  --container-max: 80rem;
  --content-max: 48rem;
  --reading-max: 42rem;
}


/* ================================================================
   2. RESET & BASE
   ================================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--bg-paper);
  color: var(--text-light);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
}


/* ================================================================
   3. TYPOGRAPHY
   ================================================================ */

/* Font family helpers */
.font-head,
.serif { font-family: var(--font-head); }

.font-body { font-family: var(--font-body); }

.font-mono,
.mono { font-family: var(--font-mono); }

/* Hero-scale headline */
.text-hero {
  font-family: var(--font-head);
  font-size: clamp(36px, 4.5vw, 56px);
  line-height: 1.12;
  letter-spacing: -0.03em;
}

/* Section title (large serif heading) */
.section-title {
  font-family: var(--font-head);
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

/* Section description */
.section-desc {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  max-width: 720px;
}

/* Monospace label (used everywhere: nav, tags, section markers) */
.label {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-weight: 700;
}

/* Fig labels (section markers on homepage) */
.fig-label {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

/* Category tags (blog index) */
.tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

/* Standard heading sizes */
h1 { line-height: 1.15; letter-spacing: -0.025em; }
h2 { line-height: 1.25; letter-spacing: -0.02em; }
h3 { line-height: 1.35; }


/* ================================================================
   4. LAYOUT
   ================================================================ */

/* Standard container (80rem / 1280px) */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}
@media (min-width: 768px) {
  .container { padding: 0 2rem; }
}

/* Wide container alias (same as .container, explicit name) */
.container-wide {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}
@media (min-width: 768px) {
  .container-wide { padding: 0 2rem; }
}

/* Narrow container for reading content */
.container-narrow {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}
@media (min-width: 768px) {
  .container-narrow { padding: 0 2rem; }
}

/* Section spacing */
.section {
  padding: var(--section-pad) 0;
  position: relative;
}

/* Grid utilities */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}
@media (min-width: 768px) {
  .grid-2 { grid-template-columns: 1fr 1fr; }
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}
@media (min-width: 768px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

.grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}
@media (min-width: 768px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}


/* ================================================================
   5. NAVIGATION
   ================================================================ */

/* Base nav: always dark, fixed, blurred backdrop */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  padding: 1.25rem 0;
  background: rgba(10, 10, 20, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all 0.3s ease;
}

.nav.scrolled {
  padding: 0.75rem 0;
  background: rgba(10, 10, 20, 0.9);
  border-bottom: 1px solid var(--border-dark);
}

/* Inner flex layout */
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Nav links row */
.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

/* Individual nav link */
.nav-link {
  color: rgba(237, 234, 228, 0.7);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--text-dark);
}

.nav-link.active {
  color: var(--text-dark);
}

/* Mobile hamburger toggle */
.nav-mobile {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-dark);
}

/* Mobile slide-down menu */
.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 1rem;
  padding: 1.5rem;
  background: rgba(10, 10, 20, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-dark);
}

.mobile-menu.open {
  display: flex;
}

/* Light nav variant (used on homepage light sections) */
.nav.nav-light {
  background: rgba(242, 240, 235, 0.92);
  border-bottom-color: var(--border-light);
}

.nav.nav-light .nav-link {
  color: var(--text-dim-light);
}

.nav.nav-light .nav-link:hover {
  color: var(--text-light);
}

/* Show mobile toggle, hide desktop links on small screens */
@media (max-width: 767px) {
  .nav-links { display: none; }
  .nav-mobile { display: block; }
}


/* ================================================================
   6. BUTTONS
   ================================================================ */

/* Primary accent CTA */
.btn-accent {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 700;
  padding: 14px 28px;
  border-radius: 2px;
  text-decoration: none;
  transition: all 0.2s ease;
  border: none;
  cursor: pointer;
}

.btn-accent:hover {
  background: var(--accent-dim);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--accent-glow);
  color: #fff;
}

/* Secondary outline button */
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: transparent;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 700;
  padding: 14px 28px;
  border-radius: 2px;
  border: 1px solid var(--accent-border);
  text-decoration: none;
  transition: all 0.2s ease;
  cursor: pointer;
}

.btn-outline:hover {
  background: rgba(74, 144, 217, 0.1);
  border-color: var(--accent);
}

/* Hero CTA (inverted style, used on dark homepage hero) */
.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--bg-dark);
  background: var(--text-dark);
  padding: 14px 28px;
  text-decoration: none;
  border: 1px solid var(--text-dark);
  transition: all 0.2s;
}

.hero-cta:hover {
  background: transparent;
  color: var(--text-dark);
}


/* ================================================================
   7. CARDS
   ================================================================ */

/* Dark card (used in dark sections) */
.card-dark,
.tech-card {
  position: relative;
  border: 1px solid var(--border-dark);
  padding: 2rem;
  background: var(--card-bg-dark);
  transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.card-dark:hover,
.tech-card:hover {
  border-color: var(--border-hover-dark);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(74, 144, 217, 0.1);
}

/* Light card (used in light sections) */
.card-light {
  position: relative;
  border: 1px solid var(--border-light);
  padding: 2rem;
  background: var(--card-bg-light);
  transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
  border-radius: 2px;
}

.card-light:hover {
  border-color: var(--border-hover-light);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(74, 144, 217, 0.12);
}

/* Corner accent marks (shared by tech-card, engagement-panel, quote-box) */
.card-corners::before,
.card-corners::after,
.tech-card::before,
.tech-card::after {
  content: '';
  position: absolute;
  width: 12px;
  height: 12px;
  border-color: var(--accent);
  border-style: solid;
  opacity: 0.5;
  transition: opacity 0.3s ease;
}

.card-corners:hover::before,
.card-corners:hover::after,
.tech-card:hover::before,
.tech-card:hover::after {
  opacity: 1;
}

.card-corners::before,
.tech-card::before {
  top: -1px;
  left: -1px;
  border-width: 1px 0 0 1px;
}

.card-corners::after,
.tech-card::after {
  bottom: -1px;
  right: -1px;
  border-width: 0 1px 1px 0;
}

/* Engagement panels (Track A / Track B cards) */
.engagement-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 2rem;
}
@media (min-width: 768px) {
  .engagement-grid { grid-template-columns: 1fr 1fr; }
}

.engagement-panel {
  padding: 2.5rem;
  position: relative;
  transition: all 0.3s ease;
  cursor: default;
  border: 1px solid var(--border-dark);
  background: var(--card-bg-dark);
}

.engagement-panel:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(74, 144, 217, 0.12);
}

.engagement-panel:hover::before,
.engagement-panel:hover::after {
  opacity: 1;
}

.engagement-panel::before,
.engagement-panel::after {
  content: '';
  position: absolute;
  width: 14px;
  height: 14px;
  border-color: var(--accent);
  border-style: solid;
  opacity: 0.4;
}

.engagement-panel::before {
  top: -1px;
  left: -1px;
  border-width: 1px 0 0 1px;
}

.engagement-panel::after {
  bottom: -1px;
  right: -1px;
  border-width: 0 1px 1px 0;
}

.engagement-type {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.engagement-title {
  font-family: var(--font-head);
  font-size: 22px;
  margin-bottom: 1rem;
}

.engagement-desc {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.engagement-features {
  list-style: none;
  padding: 0;
}

.engagement-features li {
  font-family: var(--font-body);
  font-size: 15px;
  padding: 0.65rem 0;
  display: flex;
  align-items: center;
  gap: 10px;
  border-top: 1px solid var(--border-dark);
}

.engagement-features li:last-child {
  border-bottom: 1px solid var(--border-dark);
}


/* ================================================================
   8. SECTION THEMES
   ================================================================ */

/* --- Dark Section --- */
.section-dark {
  background: var(--bg-dark);
  color: var(--text-dark);
  position: relative;
}

.section-dark::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-dark) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-dark) 1px, transparent 1px);
  background-size: 48px 48px;
}

.section-dark .section-title { color: var(--text-dark); }
.section-dark .section-desc { color: var(--text-dim-dark); }

.section-dark .spec-desc,
.section-dark .about-text,
.section-dark .about-timeline-desc,
.section-dark .solution-desc,
.section-dark .flow-desc,
.section-dark .engagement-desc,
.section-dark .faq-answer-text { color: var(--text-dim-dark); }

.section-dark .spec-name,
.section-dark .solution-label,
.section-dark .flow-title,
.section-dark .faq-question,
.section-dark .engagement-title { color: var(--text-dark); }

.section-dark .tech-card,
.section-dark .engagement-panel {
  border-color: var(--border-dark);
  background: var(--card-bg-dark);
}
.section-dark .tech-card:hover,
.section-dark .engagement-panel:hover { border-color: var(--border-hover-dark); }

.section-dark .spec-table tr { border-bottom: 1px solid var(--border-dark); }
.section-dark .spec-table tr:hover { background: var(--hover-dark); }
.section-dark .solution-row { border-bottom: 1px solid var(--border-dark); }
.section-dark .solution-row:first-child { border-top: 1px solid var(--border-dark); }
.section-dark .solution-row:hover { background: var(--hover-dark); }
.section-dark .about-timeline-item { border-bottom: 1px solid var(--border-dark); }
.section-dark .about-timeline-item:first-child { border-top: 1px solid var(--border-dark); }
.section-dark .flow-line { background: var(--border-dark); }
.section-dark .flow-node { background: var(--bg-dark); border-color: var(--border-dark); }
.section-dark .faq-item { border-bottom: 1px solid var(--border-dark); }
.section-dark .faq-item:first-child { border-top: 1px solid var(--border-dark); }
.section-dark .engagement-features li { border-top: 1px solid var(--border-dark); color: var(--text-dim-dark); }
.section-dark .engagement-features li:last-child { border-bottom: 1px solid var(--border-dark); }

.section-dark .quote-box { border-color: var(--border-dark); }
.section-dark .quote-text { color: var(--text-dark); }
.section-dark .quote-author { color: var(--text-dim-dark); }
.section-dark .quote-author strong { color: var(--text-dark); }

.section-dark + .section-dark { border-top: 1px solid var(--border-dark); }

/* --- Light Section --- */
.section-light {
  background: var(--bg-light);
  color: var(--text-light);
  position: relative;
}

.section-light::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-light) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-light) 1px, transparent 1px);
  background-size: 48px 48px;
}

.section-light .section-title { color: var(--text-light); }
.section-light .section-desc { color: var(--text-dim-light); }
.section-light .spec-id { color: var(--accent); }

.section-light .spec-desc,
.section-light .about-text,
.section-light .about-timeline-desc,
.section-light .solution-desc,
.section-light .flow-desc,
.section-light .engagement-desc,
.section-light .faq-answer-text { color: var(--text-dim-light); }

.section-light .spec-name,
.section-light .solution-label,
.section-light .flow-title,
.section-light .faq-question,
.section-light .engagement-title { color: var(--text-light); }

.section-light .tech-card,
.section-light .engagement-panel {
  border-color: var(--border-light);
  background: var(--card-bg-light);
}
.section-light .tech-card:hover,
.section-light .engagement-panel:hover { border-color: var(--border-hover-light); }

.section-light .spec-table tr { border-bottom: 1px solid var(--border-light); }
.section-light .spec-table tr:hover { background: var(--hover-light); }
.section-light .solution-row { border-bottom: 1px solid var(--border-light); }
.section-light .solution-row:first-child { border-top: 1px solid var(--border-light); }
.section-light .solution-row:hover { background: var(--hover-light); }
.section-light .about-timeline-item { border-bottom: 1px solid var(--border-light); }
.section-light .about-timeline-item:first-child { border-top: 1px solid var(--border-light); }
.section-light .flow-line { background: var(--border-light); }
.section-light .flow-node { background: var(--bg-light); border-color: var(--border-light); }
.section-light .faq-item { border-bottom: 1px solid var(--border-light); }
.section-light .faq-item:first-child { border-top: 1px solid var(--border-light); }
.section-light .faq-btn { background: none; }
.section-light .engagement-features li { border-top: 1px solid var(--border-light); color: var(--text-dim-light); }
.section-light .engagement-features li:last-child { border-bottom: 1px solid var(--border-light); }

.section-light .quote-box { border-color: var(--border-light); }
.section-light .quote-text { color: var(--text-light); }
.section-light .quote-author { color: var(--text-dim-light); }
.section-light .quote-author strong { color: var(--text-light); }

.section-light + .section-light { border-top: 1px solid var(--border-light); }

/* --- Paper Section (warm cream background, used on blog posts) --- */
.section-paper {
  background: var(--bg-paper);
  color: var(--text-light);
  position: relative;
}


/* ================================================================
   9. ARTICLE / BLOG BODY
   ================================================================ */

/* Dark hero banner for pillar pages */
.article-hero {
  background: var(--bg-dark);
  padding: 8rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(74, 144, 217, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 144, 217, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* Article body (reading column) */
.article-body {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 3rem 1.5rem 6rem;
  position: relative;
  z-index: 10;
}
@media (min-width: 768px) {
  .article-body { padding: 4rem 2rem 8rem; }
}

/* Narrower reading width for blog posts */
.article-body--narrow {
  max-width: var(--reading-max);
}

/* Article headings */
.article-body h2 {
  font-family: var(--font-head);
  font-size: 1.75rem;
  line-height: 1.25;
  margin-top: 3.5rem;
  margin-bottom: 1rem;
  color: var(--text-light);
  letter-spacing: -0.01em;
}

.article-body h3 {
  font-family: var(--font-head);
  font-size: 1.25rem;
  line-height: 1.35;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-light);
}

/* Article paragraphs */
.article-body p {
  font-size: 1.0625rem;
  line-height: 1.75;
  margin-bottom: 1.25rem;
  color: var(--text-dim-light-80);
}

/* Article lists */
.article-body ul,
.article-body ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.article-body li {
  font-size: 1.0625rem;
  line-height: 1.75;
  margin-bottom: 0.5rem;
  color: var(--text-dim-light-80);
}

/* Article links */
.article-body a {
  color: var(--link-blue);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.article-body a:hover {
  color: var(--accent-dim);
}

/* Article bold text */
.article-body strong {
  color: var(--text-light);
  font-weight: 600;
}

/* Article blockquotes */
.article-body blockquote {
  border-left: 3px solid var(--accent);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  background: rgba(74, 144, 217, 0.04);
  border-radius: 0 2px 2px 0;
}

.article-body blockquote p {
  margin-bottom: 0;
  font-style: italic;
  color: var(--text-dim-light-70);
}

/* Article images */
.article-body figure {
  margin: 2rem 0 2.5rem;
}

.article-body figure img {
  width: 100%;
  height: auto;
  border-radius: 2px;
}

/* Article meta (date/author line) */
.article-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(26, 26, 46, 0.4);
}

/* Ensure btn-accent inside articles stays white */
.article-body .btn-accent {
  color: #fff;
  text-decoration: none;
}
.article-body .btn-accent:hover {
  color: #fff;
}

/* CTA box at bottom of articles */
.cta-box {
  border: 1px solid var(--accent-border);
  border-radius: 2px;
  background: var(--bg-dark);
  color: var(--text-dark);
  padding: 2.5rem;
  margin-top: 3rem;
  text-align: center;
}

.cta-box h3 {
  font-family: var(--font-head);
  font-size: 1.35rem;
  margin-bottom: 1rem;
  color: var(--text-dark);
}

.cta-box p {
  color: var(--text-dim-dark-70);
  margin-bottom: 1.5rem;
}

/* CTA section (full-width dark band, used on about/pillar pages) */
.cta-section {
  background: var(--bg-dark);
  padding: 5rem 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(74, 144, 217, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 144, 217, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
}

.cta-section h2 {
  color: var(--text-dark);
  font-family: var(--font-head);
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.cta-section p {
  color: var(--text-dim-dark-70);
  margin-bottom: 1.5rem;
  font-size: 1.0625rem;
}

/* Table of contents (pillar page) */
.toc {
  background: #fff;
  border: 1px solid rgba(10, 10, 20, 0.07);
  border-radius: 2px;
  padding: 2rem;
  margin-bottom: 3rem;
}

.toc-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 600;
  color: rgba(10, 10, 20, 0.4);
  margin-bottom: 1rem;
}

.toc a {
  display: block;
  color: rgba(10, 10, 20, 0.6);
  text-decoration: none;
  font-size: 0.9375rem;
  padding: 0.375rem 0;
  transition: color 0.2s;
}

.toc a:hover {
  color: var(--accent);
}

/* Body content (about page prose) */
.body-content {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}
@media (min-width: 768px) {
  .body-content { padding: 4rem 2rem 5rem; }
}

.body-content h2 {
  font-family: var(--font-head);
  font-size: 1.75rem;
  line-height: 1.25;
  margin-top: 3.5rem;
  margin-bottom: 1rem;
  color: var(--text-light);
  letter-spacing: -0.01em;
}

.body-content h2:first-child {
  margin-top: 0;
}

.body-content p {
  font-size: 1.0625rem;
  line-height: 1.75;
  margin-bottom: 1.25rem;
  color: var(--text-dim-light-80);
}

.body-content strong {
  color: var(--text-light);
  font-weight: 600;
}


/* ================================================================
   10. FIELD NOTES / BLOG INDEX
   ================================================================ */

/* Hero three-column grid */
.hero-grid {
  display: grid;
  grid-template-columns: 35% 40% 25%;
  gap: 0;
  border-bottom: 1px solid rgba(26, 26, 46, 0.15);
  min-height: 320px;
}

/* Left column: lead post */
.hero-lead {
  padding: 2rem 2rem 2rem 0;
  border-right: 1px solid rgba(26, 26, 46, 0.15);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-lead-title {
  font-family: var(--font-head);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-light);
  text-decoration: none;
  display: block;
  margin-bottom: 0.6rem;
  transition: color 0.2s;
}

.hero-lead-title:hover {
  color: var(--accent);
}

.hero-lead-excerpt {
  font-size: 16px;
  line-height: 1.6;
  color: rgba(26, 26, 46, 0.55);
  margin-bottom: 0.75rem;
}

.hero-lead-date {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(26, 26, 46, 0.4);
}

/* Center column: featured dark panel */
.hero-featured {
  position: relative;
  background: var(--bg-dark);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2.5rem 2rem;
}

.hero-featured::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(74, 144, 217, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 144, 217, 0.06) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.hero-featured .tag {
  color: #6aadf0;
  margin-bottom: 0.6rem;
  position: relative;
  z-index: 1;
}

.hero-featured-title {
  font-family: var(--font-head);
  font-size: 1.5rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text-dark);
  text-decoration: none;
  display: block;
  position: relative;
  z-index: 1;
  transition: color 0.2s;
}

.hero-featured-title:hover {
  color: #6aadf0;
}

/* Right column: sidebar picks */
.hero-sidebar {
  padding: 1.5rem 0 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-weight: 600;
  color: rgba(26, 26, 46, 0.45);
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgba(26, 26, 46, 0.15);
}

.sidebar-item {
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(26, 26, 46, 0.1);
}

.sidebar-item:last-child {
  border-bottom: none;
}

.sidebar-link {
  font-family: var(--font-head);
  font-size: 1.1rem;
  line-height: 1.35;
  color: var(--text-light);
  text-decoration: none;
  transition: color 0.2s;
  display: block;
}

.sidebar-link:hover {
  color: var(--accent);
}

/* Top Notes grid (4-column featured cards) */
.top-notes-label {
  text-align: center;
  padding: 2.5rem 0 0;
  position: relative;
}

.top-notes-label::before {
  content: '';
  display: block;
  height: 1px;
  background: rgba(26, 26, 46, 0.15);
  margin-bottom: 1.5rem;
}

.top-notes-label span {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-weight: 600;
  color: rgba(26, 26, 46, 0.4);
  display: inline-block;
  padding: 0 1.5rem;
  position: relative;
}

.top-notes-label::after {
  content: '';
  display: block;
  height: 1px;
  background: rgba(26, 26, 46, 0.15);
  margin-top: 1.5rem;
}

.top-notes-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  padding: 2rem 0 0;
}

.top-note {
  padding: 0;
}

.top-note-title {
  font-family: var(--font-head);
  font-size: 1.2rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
}

.top-note-title a {
  color: var(--text-light);
  text-decoration: none;
  transition: color 0.2s;
}

.top-note-title a:hover {
  color: var(--accent);
}

.top-note-date {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(26, 26, 46, 0.4);
}

/* All Notes label */
.all-notes-label {
  padding: 2.5rem 0 0;
  margin-top: 2rem;
  position: relative;
}

.all-notes-label::before {
  content: '';
  display: block;
  height: 1px;
  background: rgba(26, 26, 46, 0.15);
  margin-bottom: 1.5rem;
}

.all-notes-label span {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-weight: 600;
  color: rgba(26, 26, 46, 0.4);
}

/* Article list (vertical feed) */
.article-list {
  border-top: 1px solid rgba(26, 26, 46, 0.15);
  margin-top: 1.5rem;
}

.article-item {
  border-bottom: 1px solid rgba(26, 26, 46, 0.15);
  padding: 2rem 0;
  display: block;
  text-decoration: none;
  color: inherit;
  transition: background 0.2s;
}

.article-item:hover {
  background: rgba(26, 26, 46, 0.03);
}

.article-item:hover .article-title {
  color: var(--accent);
}

.article-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.article-title {
  font-family: var(--font-head);
  font-size: 1.35rem;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--text-light);
  margin-bottom: 0.6rem;
  transition: color 0.2s;
}

.article-excerpt {
  font-size: 16px;
  line-height: 1.7;
  color: rgba(26, 26, 46, 0.65);
  max-width: 600px;
}


/* ================================================================
   11. FORM STYLES
   ================================================================ */

/* Contact section wrapper */
.contact-section {
  padding: var(--section-pad) 0;
  background: #0d1a2e;
  background-image: radial-gradient(ellipse at 50% 50%, rgba(74, 144, 217, 0.08) 0%, transparent 60%);
  position: relative;
  border-top: 2px solid var(--accent);
}

.contact-section::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-dark) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-dark) 1px, transparent 1px);
  background-size: 48px 48px;
}

.contact-grid {
  display: grid;
  gap: 3rem;
}
@media (min-width: 768px) {
  .contact-grid { grid-template-columns: 1fr 1fr; }
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim-dark);
  display: block;
  margin-bottom: 0.5rem;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-dark);
  color: var(--text-dark);
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 12px 14px;
  outline: none;
  transition: border-color 0.2s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--accent);
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238a8780' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
  background-color: rgba(255, 255, 255, 0.03);
}

.form-select option {
  background: var(--bg-dark);
  color: var(--text-dark);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

.form-submit {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bg-dark);
  background: var(--text-dark);
  border: 1px solid var(--text-dark);
  padding: 18px 32px;
  width: 100%;
  cursor: pointer;
  transition: all 0.2s;
}

.form-submit:hover {
  background: transparent;
  color: var(--text-dark);
}

/* Radio group (used in contact forms) */
.radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.radio-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 14px;
  border: 1px solid var(--border-dark);
  border-radius: 2px;
  color: var(--text-dim-dark);
  cursor: pointer;
  transition: all 0.2s;
}

.radio-label:hover,
.radio-label.selected {
  border-color: var(--accent);
  color: var(--accent);
}

/* Contact info block */
.contact-info-block {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.contact-info-block .section-desc {
  margin-bottom: 2rem;
  color: var(--text-dim-dark);
}

.contact-detail {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim-dark);
  padding: 0.75rem 0;
  border-top: 1px solid var(--border-dark);
  display: flex;
  align-items: center;
  gap: 10px;
}

.contact-detail:last-child {
  border-bottom: 1px solid var(--border-dark);
}

.contact-detail span:first-child {
  color: var(--accent);
  width: 80px;
  flex-shrink: 0;
  text-transform: uppercase;
  font-size: 10px;
  letter-spacing: 0.12em;
}


/* ================================================================
   12. FOOTER
   ================================================================ */

footer {
  padding: 3rem 0;
  background: var(--bg-dark);
  border-top: 1px solid var(--border-dark);
  color: var(--text-dark);
}

footer a {
  color: rgba(237, 234, 228, 0.4);
  text-decoration: none;
  transition: color 0.2s;
}

footer a:hover {
  color: var(--text-dark);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-left {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim-dark);
  letter-spacing: 0.05em;
}

.footer-tagline {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim-dark);
  font-style: italic;
  margin-top: 0.5rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim-dark);
  text-decoration: none;
  letter-spacing: 0.05em;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--text-dark);
}


/* ================================================================
   13. ANIMATIONS & REVEAL
   ================================================================ */

/* Scroll-triggered fade up */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered delays */
.reveal-d1 { transition-delay: 0.05s; }
.reveal-d2 { transition-delay: 0.1s; }
.reveal-d3 { transition-delay: 0.15s; }
.reveal-d4 { transition-delay: 0.2s; }
.reveal-d5 { transition-delay: 0.25s; }

/* Keyframe for JS-triggered animations */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}


/* ================================================================
   14. EFFECTS
   ================================================================ */

/* Grain texture overlay (light) */
.grain {
  position: relative;
}

.grain::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 200px 200px;
}

/* Grain heavy (stronger noise) */
.grain-heavy {
  position: relative;
}

.grain-heavy::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.07;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 200px 200px;
}

/* Engineering grid pattern (used as section background) */
.hero-grid-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-dark) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-dark) 1px, transparent 1px);
  background-size: 48px 48px;
}

/* Glow line separator */
.glow-line {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.4;
}

/* Status dot (green active indicator) */
.status-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--green);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--green-glow);
  flex-shrink: 0;
}

/* Sector tags (about page) */
.sector-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.sector-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 14px;
  border: 1px solid rgba(26, 26, 46, 0.15);
  border-radius: 2px;
  color: rgba(10, 10, 20, 0.7);
  background: rgba(255, 255, 255, 0.4);
}

/* Founder quote box */
.quote-box {
  padding: 3rem;
  position: relative;
  max-width: 720px;
  margin: 0 auto;
}

.quote-box::before,
.quote-box::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border-color: var(--accent);
  border-style: solid;
}

.quote-box::before {
  top: -1px;
  left: -1px;
  border-width: 1px 0 0 1px;
}

.quote-box::after {
  bottom: -1px;
  right: -1px;
  border-width: 0 1px 1px 0;
}

.quote-mark {
  font-family: var(--font-head);
  font-size: 48px;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 1rem;
  opacity: 0.6;
}

.quote-text {
  font-family: var(--font-head);
  font-size: 22px;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  font-style: italic;
  letter-spacing: -0.01em;
}

.quote-author {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}


/* ================================================================
   15. SCROLLBAR
   ================================================================ */

::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-paper);
}

::-webkit-scrollbar-thumb {
  background: #c4c0b8;
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}


/* ================================================================
   16. UTILITY CLASSES
   ================================================================ */

/* Text alignment */
.text-center { text-align: center; }
.text-left   { text-align: left; }
.text-right  { text-align: right; }

/* Margin helpers */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-6 { margin-top: 3rem; }
.mt-8 { margin-top: 4rem; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-6 { margin-bottom: 3rem; }

/* Padding helpers */
.pt-0 { padding-top: 0; }
.pt-4 { padding-top: 2rem; }
.pt-8 { padding-top: 4rem; }
.pb-0 { padding-bottom: 0; }
.pb-4 { padding-bottom: 2rem; }
.pb-8 { padding-bottom: 4rem; }

/* Screen reader only (accessible to crawlers/screen readers) */
.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;
}

/* Position relative with z-index for content over grid backgrounds */
.z-content {
  position: relative;
  z-index: 10;
}


/* ================================================================
   17. RESPONSIVE BREAKPOINTS
   ================================================================ */

/* ---- Homepage components ---- */

/* Spec table */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 2rem;
}

.spec-table tr {
  transition: background 0.2s;
}

.spec-table td {
  padding: 1.5rem 0;
  vertical-align: top;
}

.spec-table .spec-id {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.1em;
  width: 60px;
  padding-right: 1rem;
}

.spec-table .spec-name {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  width: 220px;
  padding-right: 2rem;
}

.spec-table .spec-desc {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  max-width: 720px;
}

/* About grid */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  margin-top: 2rem;
}

.about-text {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
}

.about-text p { margin-bottom: 1.5rem; }
.about-text p:last-child { margin-bottom: 0; }

.about-timeline-item { padding: 1.5rem 0; }

.about-timeline-year {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 300;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.75rem;
}

.about-timeline-desc {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
}

/* Solutions list */
.solutions-list { margin-top: 2rem; }

.solution-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 2rem;
  padding: 2rem 0;
  align-items: start;
  transition: background 0.2s;
}

.solution-label {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.solution-label .status-dot { margin-top: 6px; }

.solution-desc {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  max-width: 720px;
}

.solution-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
  display: block;
}

/* Process flowchart */
.flowchart {
  margin-top: 3rem;
  position: relative;
}

.flow-line {
  position: absolute;
  left: 19px;
  top: 0;
  bottom: 0;
  width: 1px;
}

.flow-step {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 2rem;
  padding-bottom: 3rem;
  position: relative;
}

.flow-step:last-child { padding-bottom: 0; }

.flow-node {
  position: relative;
  z-index: 2;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  transition: all 0.3s;
}

.flow-step:hover .flow-node {
  border-color: var(--accent);
  box-shadow: 0 0 12px rgba(74, 144, 217, 0.15);
}

.flow-content { padding-top: 6px; }

.flow-title {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.flow-desc {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  max-width: 720px;
}

/* FAQ */
.faq-btn {
  width: 100%;
  background: none;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 0;
  cursor: pointer;
  text-align: left;
}

.faq-question {
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 500;
  padding-right: 1rem;
}

.faq-icon {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--accent);
  flex-shrink: 0;
  transition: transform 0.3s;
  width: 20px;
  text-align: center;
}

.faq-icon.open {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}

.faq-answer.open {
  max-height: 400px;
  padding-bottom: 1.25rem;
}

.faq-answer-text {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  max-width: 720px;
}

/* Principles (about page) */
.principle { margin-bottom: 2rem; }

.principle-title {
  font-family: var(--font-head);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-light);
  margin-bottom: 0.5rem;
}

.principle p { margin-bottom: 0; }

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

.principles-list li {
  counter-increment: principles;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.75;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(26, 26, 46, 0.08);
  color: var(--text-dim-light-80);
  display: flex;
  gap: 1rem;
}

.principles-list li:first-child {
  border-top: 1px solid rgba(26, 26, 46, 0.08);
}

.principles-list li::before {
  content: counter(principles, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  font-weight: 600;
  flex-shrink: 0;
  padding-top: 3px;
}

/* Hero section (homepage full-screen) */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 0 6rem;
  position: relative;
  background: var(--bg-dark);
  color: var(--text-dark);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-dark) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-dark) 1px, transparent 1px);
  background-size: 48px 48px;
}

.hero-content {
  max-width: 720px;
  position: relative;
  z-index: 1;
}

.hero-status {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-dim-dark);
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero h1 {
  font-family: var(--font-head);
  font-size: clamp(36px, 4.5vw, 56px);
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--text-dark);
  margin-bottom: 2rem;
}

.hero-subtitle {
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.75;
  color: rgba(237, 234, 228, 0.7);
  max-width: 560px;
  margin-bottom: 3rem;
}

.hero-meta {
  position: absolute;
  right: 2rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(237, 234, 228, 0.15);
  writing-mode: vertical-rl;
  display: none;
  z-index: 1;
}
@media (min-width: 1024px) {
  .hero-meta { display: block; }
}


/* ---- Tablet: max-width 1023px ---- */
@media (max-width: 1023px) {
  .hero-grid {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
  }

  .hero-lead {
    grid-column: 1 / 2;
    border-right: 1px solid rgba(26, 26, 46, 0.15);
    padding: 2rem 1.5rem 2rem 0;
  }

  .hero-featured {
    grid-column: 2 / 3;
    grid-row: 1 / 2;
  }

  .hero-sidebar {
    grid-column: 1 / -1;
    grid-row: 2 / 3;
    padding: 1.5rem 0;
    border-top: 1px solid rgba(26, 26, 46, 0.15);
    flex-direction: row;
    gap: 1.5rem;
    flex-wrap: wrap;
  }

  .sidebar-header {
    width: 100%;
    margin-bottom: 0.5rem;
  }

  .sidebar-item {
    flex: 1;
    min-width: 200px;
    border-bottom: none;
    border-right: 1px solid rgba(26, 26, 46, 0.1);
    padding: 0 1rem 0 0;
  }

  .sidebar-item:last-child { border-right: none; }

  .top-notes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}


/* ---- Mobile: max-width 767px ---- */
@media (max-width: 767px) {
  .container { padding: 0 1.25rem; }

  /* Nav */
  .nav-links { display: none; }
  .nav-mobile { display: block; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10, 10, 20, 0.95);
    backdrop-filter: blur(12px);
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-dark);
    gap: 1.25rem;
  }

  /* Homepage hero */
  .hero {
    padding: 7rem 0 4rem;
    min-height: auto;
  }

  /* Spec table stacking */
  .spec-table .spec-name { width: auto; }
  .spec-table td { display: block; padding: 0.25rem 0; }
  .spec-table tr { padding: 1.25rem 0; display: block; }

  /* About grid stacking */
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  /* Solution rows stacking */
  .solution-row {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  /* Quote box smaller padding */
  .quote-box { padding: 2rem; }

  /* Flowchart smaller */
  .flow-step { grid-template-columns: 36px 1fr; gap: 1.25rem; }
  .flow-node { width: 36px; height: 36px; font-size: 11px; }
  .flow-line { left: 17px; }

  /* Blog index hero grid stacking */
  .hero-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
  }

  .hero-lead {
    grid-column: 1;
    grid-row: 1;
    border-right: none;
    border-bottom: 1px solid rgba(26, 26, 46, 0.15);
    padding: 2rem 0;
  }

  .hero-featured {
    grid-column: 1;
    grid-row: 2;
  }

  .hero-sidebar {
    grid-column: 1;
    grid-row: 3;
    flex-direction: column;
    gap: 0;
    padding: 1.5rem 0;
  }

  .sidebar-item {
    border-right: none;
    border-bottom: 1px solid rgba(26, 26, 46, 0.1);
    padding: 0.75rem 0;
  }

  /* Top notes single column */
  .top-notes-grid {
    grid-template-columns: 1fr;
  }
}