/* ──────────────────────────────────────────────────────────────────────
   Vertical Data Group — shared stylesheet
   Loaded by every page under /vdg/. Polished from the prior single-page
   site: slightly larger body text (16px), more generous section padding,
   modest typographic refinements. Brand palette unchanged.
   ────────────────────────────────────────────────────────────────────── */

:root {
  --navy: #060d1a;
  --navy2: #0d1829;
  --navy3: #162035;
  --cyan: #5B8DB8;
  --cyan-dim: rgba(91,141,184,0.12);
  --cyan-border: rgba(91,141,184,0.25);
  --white: #f0f4f8;
  --muted: #7a8fa8;
  --muted2: #3d5270;
  --border: rgba(255,255,255,0.06);
  --green: #10b981;
  --amber: #f59e0b;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: var(--navy);
  color: var(--white);
  font-family: 'Outfit', sans-serif;
  font-weight: 300;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--cyan-dim);
  color: var(--white);
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 2rem;
}

a { color: var(--cyan); }

/* ── Nav ── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 13, 26, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 56px;
}

.nav-logo {
  font-family: 'DM Mono', monospace;
  font-size: 13px;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-family: 'DM Mono', monospace;
  font-size: 12px;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.06em;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--white);
}

/* ── Page header (shared) ── */
.page-header {
  padding: 96px 0 56px;
  border-bottom: 1px solid var(--border);
}

.page-header h1 {
  font-family: 'DM Serif Display', serif;
  font-weight: 400;
  font-size: 44px;
  line-height: 1.2;
  color: var(--white);
  max-width: 760px;
}

.page-header h1 em {
  color: var(--cyan);
  font-style: italic;
}

.page-header .lede {
  margin-top: 24px;
  font-size: 17px;
  color: var(--muted);
  max-width: 640px;
  line-height: 1.75;
}

/* ── Hero (home page) ── */
.hero {
  padding: 112px 0 80px;
  border-bottom: 1px solid var(--border);
}

.hero-label {
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero-label::before {
  content: '';
  display: inline-block;
  width: 32px;
  height: 1px;
  background: var(--cyan);
}

.hero h1 {
  font-family: 'DM Serif Display', serif;
  font-weight: 400;
  font-size: 52px;
  line-height: 1.18;
  color: var(--white);
  max-width: 760px;
}

.hero h1 em {
  font-family: 'DM Serif Display', serif;
  color: var(--cyan);
  font-style: italic;
}

.hero-subtext {
  margin-top: 28px;
  font-size: 17px;
  color: var(--muted);
  max-width: 600px;
  line-height: 1.8;
}

.hero-stats {
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 32px;
}

.hero-stat-label {
  font-family: 'DM Mono', monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted2);
  margin-bottom: 6px;
}

.hero-stat-value {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.5;
}

/* ── Section ── */
.section {
  padding: 88px 0;
  border-bottom: 1px solid var(--border);
}

.section:last-of-type {
  border-bottom: none;
}

.section-label {
  font-family: 'DM Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted2);
  margin-bottom: 32px;
  font-weight: 500;
}

.section-statement {
  font-family: 'DM Serif Display', serif;
  font-size: 30px;
  font-weight: 400;
  line-height: 1.45;
  color: var(--white);
  max-width: 760px;
  margin-bottom: 56px;
}

.section-statement em {
  font-family: 'DM Serif Display', serif;
  color: var(--cyan);
  font-style: italic;
}

.section-body {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.8;
  max-width: 720px;
}

.section-body p { margin-bottom: 18px; }

.section-body p:last-child { margin-bottom: 0; }

.section-body strong { color: var(--white); font-weight: 500; }

/* ── Products ── */
.product-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.product-card {
  background: var(--navy2);
  padding: 36px 32px;
  position: relative;
}

.product-card:first-child {
  border-right: 1px solid var(--border);
}

.product-badge {
  position: absolute;
  top: 20px;
  right: 20px;
  font-family: 'DM Mono', monospace;
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 4px;
}

.badge-live {
  color: var(--green);
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.badge-dev {
  color: var(--amber);
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.product-number {
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  color: var(--muted2);
  margin-bottom: 16px;
}

.product-card h3 {
  font-family: 'DM Serif Display', serif;
  font-size: 24px;
  font-weight: 400;
  color: var(--white);
  margin-bottom: 4px;
}

.product-domain {
  font-family: 'DM Mono', monospace;
  font-size: 12px;
  color: var(--cyan);
  text-decoration: none;
  margin-bottom: 16px;
  display: inline-block;
  transition: opacity 0.2s;
}

.product-domain:hover { opacity: 0.7; }

.product-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.8;
}

/* ── Pillars (methodology) ── */
.pillars {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 32px;
}

.pillars.two-col { grid-template-columns: 1fr 1fr; gap: 16px; }

.pillar {
  background: transparent;
  padding: 0;
}

.pillar.card {
  background: var(--navy2);
  padding: 24px;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.pillar-number {
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  color: var(--cyan);
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.pillar h4 {
  font-family: 'Outfit', sans-serif;
  font-size: 17px;
  font-weight: 500;
  color: var(--white);
  margin-bottom: 10px;
}

.pillar p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.8;
}

/* ── Callouts ── */
.callout {
  margin-top: 48px;
  padding: 28px;
  background: var(--navy2);
  border: 1px solid var(--border);
  border-left: 2px solid var(--cyan);
  border-radius: 6px;
}

.callout-label {
  font-family: 'DM Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.15em;
  color: var(--cyan);
  margin-bottom: 10px;
  text-transform: uppercase;
}

.callout p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.85;
  margin-bottom: 14px;
}

.callout p:last-child { margin-bottom: 0; }

.callout .aix {
  font-family: 'DM Mono', monospace;
  color: var(--cyan);
}

.identifier-callout {
  margin-top: 28px;
  padding: 28px;
  background: linear-gradient(180deg, var(--navy2) 0%, rgba(91,141,184,0.06) 100%);
  border: 1px solid var(--cyan-border);
  border-radius: 8px;
}

.identifier-callout .label {
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan);
  margin-bottom: 10px;
  text-transform: uppercase;
  font-weight: 500;
}

.identifier-callout h4 {
  font-family: 'DM Serif Display', serif;
  font-size: 24px;
  color: var(--white);
  font-weight: 400;
  margin-bottom: 14px;
}

.identifier-callout p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.85;
  margin-bottom: 12px;
}

.identifier-callout p:last-child { margin-bottom: 0; }

/* ── Publication cards (2x2) ── */
.pub-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 16px;
}

.pub-card {
  display: block;
  padding: 22px 24px;
  background: var(--navy2);
  border: 1px solid var(--border);
  border-radius: 6px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s, transform 0.2s;
}

.pub-card:hover {
  border-color: var(--cyan-border);
  transform: translateY(-2px);
}

.pub-meta {
  font-family: 'DM Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.15em;
  color: var(--muted2);
  margin-bottom: 8px;
  text-transform: uppercase;
}

.pub-title {
  font-family: 'DM Serif Display', serif;
  font-size: 19px;
  color: var(--white);
  margin-bottom: 8px;
}

.pub-desc {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.65;
}

/* ── AirIndex Spotlight ── */
.spotlight-box {
  background: var(--navy2);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  overflow: hidden;
}

.spotlight-left {
  padding: 40px 36px;
  border-right: 1px solid var(--border);
}

.spotlight-right {
  padding: 40px 36px;
}

.spotlight-product-name {
  font-family: 'DM Serif Display', serif;
  font-size: 26px;
  color: var(--white);
  margin-bottom: 4px;
}

.spotlight-tagline {
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}

.spotlight-desc {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.8;
  margin-bottom: 24px;
}

.spotlight-link {
  font-family: 'DM Mono', monospace;
  font-size: 12px;
  color: var(--cyan);
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: opacity 0.2s;
}

.spotlight-link:hover { opacity: 0.7; }

.score-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.score-row {
  display: flex;
  align-items: center;
  gap: 14px;
}

.score-city {
  font-size: 13px;
  color: var(--muted);
  min-width: 110px;
  font-weight: 400;
}

.score-bar-track {
  flex: 1;
  height: 6px;
  background: var(--navy3);
  border-radius: 3px;
  overflow: hidden;
}

.score-bar-fill {
  height: 100%;
  background: var(--cyan);
  border-radius: 3px;
  transition: width 0.3s ease;
}

.score-value {
  font-family: 'DM Mono', monospace;
  font-size: 14px;
  font-weight: 500;
  color: var(--white);
  min-width: 28px;
  text-align: right;
}

.score-tier {
  font-family: 'DM Mono', monospace;
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 500;
  padding: 3px 8px;
  border-radius: 3px;
  min-width: 78px;
  text-align: center;
  background: transparent;
}

.tier-advanced {
  color: var(--cyan);
  border: 1px solid var(--cyan-border);
}

.tier-moderate {
  color: var(--green);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.tier-early {
  color: var(--amber);
  border: 1px solid rgba(245, 158, 11, 0.25);
}

/* ── Leadership ── */
.leadership-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 40px;
  align-items: start;
}

.leadership-card {
  background: var(--navy2);
  padding: 32px 28px;
  border: 1px solid var(--border);
  border-radius: 8px;
  text-align: center;
}

.leadership-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--cyan) 0%, var(--cyan-dim) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 22px;
  font-family: 'DM Serif Display', serif;
  font-size: 42px;
  color: var(--white);
}

.leadership-name {
  font-family: 'DM Serif Display', serif;
  font-size: 24px;
  color: var(--white);
  margin-bottom: 6px;
}

.leadership-role {
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--cyan);
}

.leadership-bio p {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.9;
  margin-bottom: 18px;
}

.leadership-bio p:last-child {
  font-size: 14px;
  color: var(--muted2);
  line-height: 1.75;
  margin-bottom: 0;
}

/* ── Track record ── */
.event-list { display: flex; flex-direction: column; gap: 24px; }

.event {
  background: var(--navy2);
  border: 1px solid var(--border);
  border-left: 2px solid var(--cyan);
  border-radius: 6px;
  padding: 24px 28px;
}

.event-date {
  font-family: 'DM Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.15em;
  color: var(--cyan);
  text-transform: uppercase;
  margin-bottom: 10px;
  font-weight: 500;
}

.event h3 {
  font-family: 'DM Serif Display', serif;
  font-size: 20px;
  font-weight: 400;
  color: var(--white);
  margin-bottom: 12px;
}

.event p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.85;
  margin-bottom: 10px;
}

.event p:last-child { margin-bottom: 0; }

.event .aix {
  font-family: 'DM Mono', monospace;
  color: var(--cyan);
}

/* ── Contact ── */
.contact-routes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-bottom: 40px;
}

.contact-route {
  padding: 18px 20px;
  background: var(--navy2);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: border-color 0.2s, transform 0.2s;
}

.contact-route:hover,
.contact-route.active {
  border-color: var(--cyan-border);
  transform: translateY(-1px);
}

.contact-route-label {
  font-family: 'DM Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted2);
  margin-bottom: 6px;
}

.contact-route.active .contact-route-label { color: var(--cyan); }

.contact-route-name {
  font-size: 14px;
  color: var(--white);
  font-weight: 400;
}

.contact-form-heading {
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--cyan);
  margin-bottom: 20px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 640px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.contact-form label {
  font-family: 'DM Mono', monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted2);
  margin-bottom: 4px;
  display: block;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  background: var(--navy2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 14px;
  font-family: 'Outfit', sans-serif;
  font-weight: 300;
  font-size: 15px;
  color: var(--white);
  outline: none;
  transition: border-color 0.2s;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder { color: var(--muted2); }

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

.contact-form textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-form button[type="submit"] {
  font-family: 'DM Mono', monospace;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
  background: var(--cyan);
  color: var(--navy);
  border: none;
  border-radius: 6px;
  padding: 14px 28px;
  cursor: pointer;
  transition: opacity 0.2s;
  align-self: flex-start;
}

.contact-form button[type="submit"]:hover { opacity: 0.85; }

.contact-form button[type="submit"]:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.form-status { font-size: 13px; line-height: 1.6; }
.form-status.success { color: var(--green); }
.form-status.error { color: #ef4444; }

/* ── Inline CTA ── */
.cta-row {
  margin-top: 32px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary,
.btn-secondary {
  font-family: 'DM Mono', monospace;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
  padding: 13px 22px;
  border-radius: 6px;
  text-decoration: none;
  transition: opacity 0.2s, border-color 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-primary {
  background: var(--cyan);
  color: var(--navy);
  border: 1px solid var(--cyan);
}

.btn-primary:hover { opacity: 0.85; }

.btn-secondary {
  background: transparent;
  color: var(--cyan);
  border: 1px solid var(--cyan-border);
}

.btn-secondary:hover { border-color: var(--cyan); }

/* ── Footer ── */
footer {
  padding: 40px 0 56px;
  border-top: 1px solid var(--border);
  margin-top: 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
}

.footer-brand p {
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  color: var(--muted2);
  letter-spacing: 0.02em;
  line-height: 1.8;
}

.footer-links-grid {
  display: grid;
  grid-template-columns: repeat(2, auto);
  gap: 8px 40px;
}

.footer-links-grid a {
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  color: var(--muted2);
  text-decoration: none;
  transition: color 0.2s;
  white-space: nowrap;
}

.footer-links-grid a:hover { color: var(--muted); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .hero h1 { font-size: 34px; }
  .page-header h1 { font-size: 30px; }
  .hero-stats { grid-template-columns: 1fr; gap: 20px; }
  .product-grid { grid-template-columns: 1fr; }
  .product-card:first-child { border-right: none; border-bottom: 1px solid var(--border); }
  .pillars { grid-template-columns: 1fr !important; gap: 16px; }
  .pub-grid { grid-template-columns: 1fr; }
  .spotlight-box { grid-template-columns: 1fr; }
  .spotlight-left { border-right: none; border-bottom: 1px solid var(--border); }
  .leadership-grid { grid-template-columns: 1fr; gap: 24px; }
  .section-statement { font-size: 22px; }
  .nav-links { gap: 14px; }
  .nav-links a { font-size: 10px; }
  .footer-inner { flex-direction: column; gap: 20px; }
  .footer-links-grid { grid-template-columns: repeat(2, 1fr); gap: 12px 24px; }
  .section { padding: 64px 0; }
}

@media (max-width: 480px) {
  .hero { padding: 80px 0 64px; }
  .hero h1 { font-size: 28px; }
  .nav-links { display: none; }
  .score-city { min-width: 80px; font-size: 12px; }
  .score-tier { min-width: 64px; font-size: 8px; }
  .container { padding: 0 1.25rem; }
}