/* ═══════════════════════════════════════════════════════════
   EdgeInsight AI — Premium Dark Theme Stylesheet
   ═══════════════════════════════════════════════════════════ */

/* ── Reset & Base ── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #060b14;
  --bg2: #0c1526;
  --bg3: #111f38;
  --surface: #0f1e35;
  --surface2: #162540;
  --border: rgba(59, 130, 246, 0.15);
  --border2: rgba(59, 130, 246, 0.25);

  --blue: #3b82f6;
  --blue-light: #60a5fa;
  --cyan: #06b6d4;
  --green: #10b981;
  --green2: #34d399;
  --yellow: #f59e0b;
  --orange: #f97316;
  --red: #ef4444;
  --purple: #8b5cf6;

  --text: #f1f5f9;
  --text2: #94a3b8;
  --text3: #64748b;

  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 32px rgba(0, 0, 0, 0.5);
  --shadow-blue: 0 0 40px rgba(59, 130, 246, 0.12);

  --font: 'Inter', system-ui, sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', monospace;

  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg2);
}

::-webkit-scrollbar-thumb {
  background: var(--blue);
  border-radius: 3px;
}

/* ── Navigation ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  background: rgba(6, 11, 20, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.nav.scrolled {
  background: rgba(6, 11, 20, 0.97);
}

.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.brand-icon {
  font-size: 1.5rem;
  filter: drop-shadow(0 0 8px var(--blue));
}

.brand-name {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
  display: block;
}

.brand-sub {
  font-size: 0.65rem;
  color: var(--text3);
  display: block;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 0.5rem;
  margin-left: auto;
}

.nav-link {
  color: var(--text2);
  font-size: 0.85rem;
  text-decoration: none;
  padding: 6px 14px;
  border-radius: 20px;
  transition: var(--transition);
}

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

.nav-pills {
  display: flex;
  gap: 8px;
  margin-left: 1rem;
}

.pill {
  font-size: 0.7rem;
  padding: 3px 10px;
  border-radius: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text2);
  letter-spacing: 0.03em;
}

.pill-live {
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.3);
  color: var(--green2);
  animation: pulse-live 2s ease-in-out infinite;
}

@keyframes pulse-live {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.6;
  }
}

/* ── Hero ── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 2rem 80px;
  overflow: hidden;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59, 130, 246, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
}

.hero-glow-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.12) 0%, transparent 70%);
  top: -100px;
  left: -200px;
}

.hero-glow-2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.08) 0%, transparent 70%);
  bottom: -50px;
  right: -100px;
}

.hero-content {
  position: relative;
  max-width: 900px;
  text-align: center;
}

.hero-eyebrow {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.eyebrow-chip {
  font-size: 0.75rem;
  padding: 5px 14px;
  border-radius: 20px;
  background: var(--surface);
  border: 1px solid var(--border2);
  color: var(--text2);
  letter-spacing: 0.04em;
}

.eyebrow-pip {
  color: var(--green2);
  border-color: rgba(16, 185, 129, 0.3);
  background: rgba(16, 185, 129, 0.07);
}

.hero-title {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.04em;
  margin-bottom: 1.5rem;
}

.gradient-text {
  background: linear-gradient(135deg, var(--blue) 0%, var(--cyan) 50%, var(--purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--text2);
  max-width: 700px;
  margin: 0 auto 2rem;
  line-height: 1.7;
}

.hero-quote {
  margin: 0 auto 2.5rem;
  max-width: 620px;
  padding: 1rem 2rem;
  border-left: 3px solid var(--blue);
  background: rgba(59, 130, 246, 0.05);
  border-radius: 0 10px 10px 0;
}

.hero-quote blockquote {
  font-style: italic;
  color: var(--text2);
  font-size: 0.95rem;
  line-height: 1.6;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.hero-stat {
  text-align: center;
}

.stat-divider {
  border-left: 1px solid var(--border);
  padding-left: 2rem;
}

.stat-num {
  display: block;
  font-size: 2rem;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  color: var(--blue-light);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hero-ctas {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.cta-primary {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 50px;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  font-size: 0.95rem;
  box-shadow: 0 0 30px rgba(59, 130, 246, 0.35);
  transition: var(--transition);
}

.cta-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 45px rgba(59, 130, 246, 0.5);
}

.cta-secondary {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 50px;
  border: 1px solid var(--border2);
  color: var(--text2);
  text-decoration: none;
  font-size: 0.95rem;
  transition: var(--transition);
}

.cta-secondary:hover {
  color: var(--text);
  border-color: var(--blue);
  background: rgba(59, 130, 246, 0.05);
}

/* ── Sections ── */
.section {
  padding: 88px 2rem;
}

.dark-section {
  background: var(--bg2);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 5px 14px;
  border-radius: 20px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  color: var(--blue-light);
  margin-bottom: 1rem;
}

.section-header h2 {
  font-size: clamp(1.7rem, 3.5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}

.section-header p {
  color: var(--text2);
  font-size: 1rem;
  max-width: 560px;
  margin: 0 auto;
}

/* ── Problem Section ── */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.problem-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: var(--transition);
}

.problem-card:hover {
  border-color: var(--border2);
  transform: translateY(-2px);
  box-shadow: var(--shadow-blue);
}

.problem-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.problem-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.problem-desc {
  font-size: 0.875rem;
  color: var(--text2);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.problem-stat {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--red);
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: 8px;
  padding: 8px 12px;
  text-align: center;
}

.solution-bridge {
  text-align: center;
}

.bridge-arrow {
  font-size: 2rem;
  color: var(--blue);
  margin-bottom: 0.5rem;
}

.bridge-text {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--green2);
  padding: 12px 24px;
  background: rgba(52, 211, 153, 0.07);
  border: 1px solid rgba(52, 211, 153, 0.2);
  border-radius: 50px;
  display: inline-block;
}

/* ── Tier Grid ── */
.tier-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.tier-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  cursor: pointer;
  transition: var(--transition);
}

.tier-card:hover,
.tier-card.active {
  border-color: var(--blue);
  background: var(--surface2);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.15);
}

.tier-badge {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 3px 10px;
  border-radius: 20px;
  display: inline-block;
  margin-bottom: 0.75rem;
}

.t1 {
  background: rgba(16, 185, 129, 0.1);
  color: var(--green2);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.t2 {
  background: rgba(59, 130, 246, 0.1);
  color: var(--blue-light);
  border: 1px solid rgba(59, 130, 246, 0.25);
}

.t3 {
  background: rgba(249, 115, 22, 0.1);
  color: var(--orange);
  border: 1px solid rgba(249, 115, 22, 0.25);
}

.t4 {
  background: rgba(139, 92, 246, 0.1);
  color: var(--purple);
  border: 1px solid rgba(139, 92, 246, 0.25);
}

.tier-name {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.tier-desc {
  font-size: 0.78rem;
  color: var(--text3);
  margin-bottom: 1rem;
  line-height: 1.5;
}

.tier-metric {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 0.75rem;
}

.metric-val {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--blue-light);
  letter-spacing: -0.03em;
  font-family: var(--mono);
}

.metric-unit {
  font-size: 0.7rem;
  color: var(--text3);
}

.tier-bar-wrap {
  background: var(--bg);
  border-radius: 4px;
  height: 4px;
  margin-bottom: 0.75rem;
}

.tier-bar {
  height: 100%;
  border-radius: 4px;
  transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.t1-bar {
  background: var(--green);
}

.t2-bar {
  background: var(--blue);
}

.t3-bar {
  background: linear-gradient(90deg, var(--orange), var(--yellow));
}

.t4-bar {
  background: linear-gradient(90deg, var(--purple), var(--cyan));
}

.tier-use {
  font-size: 0.72rem;
  color: var(--text2);
  font-weight: 600;
  margin-bottom: 0.3rem;
}

.tier-ce {
  font-size: 0.7rem;
  color: var(--text3);
}

/* tier detail panel */
.tier-detail-panel {
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-bottom: 1.5rem;
  min-height: 120px;
  transition: var(--transition);
}

.tdp-content {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  align-items: flex-start;
}

.tdp-col {
  flex: 1;
  min-width: 200px;
}

.tdp-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.tdp-desc {
  font-size: 0.875rem;
  color: var(--text2);
  line-height: 1.6;
}

.tdp-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tdp-metric {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 20px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  color: var(--blue-light);
}

/* live metrics bar */
.live-metrics-bar {
  display: flex;
  gap: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.5rem;
  flex-wrap: wrap;
}

.lm-item {
  flex: 1;
  min-width: 100px;
  text-align: center;
}

.lm-val {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--green2);
  font-family: var(--mono);
}

.lm-label {
  font-size: 0.7rem;
  color: var(--text3);
  margin-top: 2px;
}

/* ── Use Case Tabs ── */
.uc-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.uc-tab {
  padding: 10px 20px;
  border-radius: 50px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text2);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.uc-tab.active,
.uc-tab:hover {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

.uc-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  animation: fadeInUp 0.3s ease;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.uc-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.uc-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.uc-big-icon {
  font-size: 3rem;
}

.uc-title-block h3 {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 0.25rem;
}

.uc-title-block p {
  font-size: 0.875rem;
  color: var(--text2);
}

.uc-body {
  font-size: 0.9rem;
  color: var(--text2);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.uc-impact {
  margin-bottom: 1.5rem;
}

.uc-impact-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text3);
  margin-bottom: 0.75rem;
}

.uc-impact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.uc-impact-item {
  background: rgba(59, 130, 246, 0.07);
  border: 1px solid rgba(59, 130, 246, 0.15);
  border-radius: 8px;
  padding: 10px 12px;
}

.uc-impact-val {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--blue-light);
}

.uc-impact-desc {
  font-size: 0.72rem;
  color: var(--text3);
}

.uc-code-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text3);
  margin-bottom: 0.5rem;
}

.uc-code {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text2);
  white-space: pre;
  overflow-x: auto;
  line-height: 1.7;
}

.uc-products {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 1rem;
}

.uc-product-chip {
  font-size: 0.72rem;
  padding: 4px 12px;
  border-radius: 20px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text3);
}

/* ── CDA Governance ── */
.gov-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.gov-theorem-card {
  background: var(--surface);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: 0 0 30px rgba(139, 92, 246, 0.06);
}

.theorem-head {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--purple);
  margin-bottom: 1rem;
}

.theorem-eq {
  font-family: var(--mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  text-align: center;
  padding: 0.75rem;
  background: rgba(139, 92, 246, 0.07);
  border-radius: 8px;
  margin-bottom: 0.25rem;
}

.theorem-arrow {
  text-align: center;
  font-size: 1.5rem;
  color: var(--purple);
  margin: 0.25rem 0;
}

.theorem-sub {
  font-size: 0.85rem;
  color: var(--text2);
  margin: 1rem 0;
  line-height: 1.6;
  text-align: center;
}

.theorem-rule {
  font-size: 0.83rem;
  color: var(--text2);
  padding: 1rem;
  background: rgba(249, 115, 22, 0.05);
  border: 1px solid rgba(249, 115, 22, 0.15);
  border-radius: 8px;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.entropy-scale {}

.es-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text3);
  margin-bottom: 0.5rem;
}

.es-bar-wrap {
  display: flex;
  border-radius: 8px;
  overflow: hidden;
}

.es-zone {
  flex: 1;
  text-align: center;
  padding: 6px 4px;
  font-size: 0.65rem;
  font-weight: 700;
}

.es-zone.safe {
  background: rgba(16, 185, 129, 0.2);
  color: var(--green2);
}

.es-zone.warn {
  background: rgba(245, 158, 11, 0.2);
  color: var(--yellow);
}

.es-zone.danger {
  background: rgba(249, 115, 22, 0.2);
  color: var(--orange);
}

.es-zone.compressed {
  background: rgba(239, 68, 68, 0.2);
  color: var(--red);
}

.gov-status-panel {}

.gov-status-card {
  background: var(--surface);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-lg);
  padding: 2rem;
  height: 100%;
}

.gov-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 1rem;
  letter-spacing: 0.06em;
}

.green-badge {
  background: rgba(16, 185, 129, 0.15);
  color: var(--green2);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.red-badge {
  background: rgba(239, 68, 68, 0.15);
  color: var(--red);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.gov-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.gov-checks {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 1.5rem;
}

.check-item {
  font-size: 0.82rem;
  color: var(--text2);
  padding: 8px 12px;
  background: var(--bg);
  border-radius: 8px;
  border: 1px solid var(--border);
}

.check-item.fail {
  color: var(--red);
  background: rgba(239, 68, 68, 0.05);
  border-color: rgba(239, 68, 68, 0.2);
}

.gov-business-impact {
  margin-bottom: 1.5rem;
}

.gbi-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text3);
  margin-bottom: 0.75rem;
}

.gbi-items {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.gbi-item {
  font-size: 0.82rem;
  color: var(--text2);
}

.gov-btn-row {
  display: flex;
  gap: 10px;
}

.gov-btn {
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 0.83rem;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

.danger-btn {
  background: rgba(239, 68, 68, 0.1);
  color: var(--red);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.danger-btn:hover {
  background: rgba(239, 68, 68, 0.2);
}

.safe-btn {
  background: rgba(16, 185, 129, 0.1);
  color: var(--green2);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.safe-btn:hover {
  background: rgba(16, 185, 129, 0.2);
}

/* ── ROI Calculator ── */
.calc-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.calc-inputs {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.calc-input-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
}

.ci-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text2);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

input[type=range] {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  background: var(--bg);
  border-radius: 4px;
  outline: none;
  cursor: pointer;
  margin-bottom: 6px;
}

input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--blue);
  cursor: pointer;
  box-shadow: 0 0 8px rgba(59, 130, 246, 0.5);
}

.region-select {
  width: 100%;
  background: var(--bg2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 0.85rem;
  cursor: pointer;
  outline: none;
}

.ci-val-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.ci-val {
  font-size: 1rem;
  font-weight: 800;
  color: var(--blue-light);
  font-family: var(--mono);
}

.ci-context {
  font-size: 0.72rem;
  color: var(--text3);
}

.calc-results {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.calc-result-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: var(--transition);
}

.calc-result-card.featured {
  border-color: rgba(59, 130, 246, 0.3);
  background: rgba(59, 130, 246, 0.05);
}

.cr-icon {
  font-size: 1.5rem;
}

.cr-label {
  font-size: 0.75rem;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.cr-val {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text);
  font-family: var(--mono);
}

.cr-cost {
  font-size: 0.78rem;
  color: var(--green2);
  font-weight: 600;
  margin-left: auto;
  text-align: right;
}

.calc-total-card {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(6, 182, 212, 0.1));
  border: 1px solid rgba(59, 130, 246, 0.35);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-align: center;
}

.total-label {
  font-size: 0.8rem;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.total-val {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--blue-light);
  font-family: var(--mono);
  letter-spacing: -0.03em;
}

.total-caption {
  font-size: 0.75rem;
  color: var(--text3);
  margin-top: 0.5rem;
}

/* ── Architecture ── */
.arch-diagram {}

.arch-row {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.arch-layer-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
}

.arch-layer-wrap.accent-layer {
  background: rgba(59, 130, 246, 0.05);
  border-color: rgba(59, 130, 246, 0.35);
  box-shadow: 0 0 30px rgba(59, 130, 246, 0.07);
}

.arch-layer-wrap.outcome-layer {
  background: rgba(16, 185, 129, 0.04);
  border-color: rgba(16, 185, 129, 0.2);
}

.arch-layer-title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text3);
  margin-bottom: 1rem;
}

.accent-title {
  color: var(--blue-light);
}

.arch-nodes {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.arch-node {
  flex: 1;
  min-width: 120px;
  text-align: center;
  padding: 10px 12px;
  border-radius: 10px;
  font-size: 0.8rem;
  font-weight: 600;
  line-height: 1.4;
}

.arch-node small {
  font-size: 0.68rem;
  font-weight: 400;
  color: var(--text3);
  display: block;
  margin-top: 3px;
}

.arch-node.src {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text2);
}

.arch-node.eng {
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  color: var(--blue-light);
}

.arch-node.gov-node {
  background: rgba(139, 92, 246, 0.1);
  border: 1px solid rgba(139, 92, 246, 0.2);
  color: var(--purple);
}

.arch-node.out {
  background: rgba(6, 182, 212, 0.07);
  border: 1px solid rgba(6, 182, 212, 0.15);
  color: var(--cyan);
}

.arch-node.biz {
  background: rgba(16, 185, 129, 0.07);
  border: 1px solid rgba(16, 185, 129, 0.2);
  color: var(--green2);
  font-size: 0.82rem;
}

.t3-node {
  background: rgba(249, 115, 22, 0.1);
  border: 1px solid rgba(249, 115, 22, 0.2);
  color: var(--orange);
}

.arch-connector {
  text-align: center;
  font-size: 1.5rem;
  color: var(--blue);
  padding: 8px 0;
}

/* ── Executive Dashboard ── */
.exec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
}

.exec-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-align: center;
  transition: var(--transition);
}

.exec-card:hover {
  border-color: var(--border2);
  transform: translateY(-2px);
}

.exec-card.featured-exec {
  border-color: rgba(59, 130, 246, 0.35);
  background: rgba(59, 130, 246, 0.07);
  box-shadow: 0 0 30px rgba(59, 130, 246, 0.1);
}

.exec-icon {
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
}

.exec-metric {
  font-size: 1.75rem;
  font-weight: 900;
  font-family: var(--mono);
  color: var(--blue-light);
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

.exec-big {
  font-size: 2.25rem;
  color: var(--green2);
}

.exec-label {
  font-size: 0.78rem;
  color: var(--text2);
  margin-bottom: 0.5rem;
}

.exec-trend {
  font-size: 0.72rem;
  color: var(--green2);
  font-weight: 600;
}

.exec-trend.up::before {
  content: '';
}

.exec-cta {
  color: var(--blue-light);
}

.exec-note {
  margin-top: 1.5rem;
  font-size: 0.75rem;
  color: var(--text3);
  text-align: center;
}

/* ── Code Quickstart ── */
.code-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.code-tab {
  padding: 8px 18px;
  border-radius: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text2);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.code-tab.active {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}

.code-block-wrap {
  position: relative;
}

.code-block {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  overflow-x: auto;
}

.code-block code {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text2);
  white-space: pre;
  display: block;
  line-height: 1.7;
}

.copy-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text2);
  font-size: 0.75rem;
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
}

.copy-btn:hover {
  border-color: var(--blue);
  color: var(--text);
}

/* ── Footer ── */
.footer {
  padding: 2rem;
  border-top: 1px solid var(--border);
  background: var(--bg2);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-logo {
  font-size: 1.1rem;
  font-weight: 800;
}

.footer-tagline {
  font-size: 0.75rem;
  color: var(--text3);
  display: block;
  margin-top: 2px;
}

.footer-meta {
  display: flex;
  gap: 1.5rem;
  font-size: 0.78rem;
  color: var(--text3);
  flex-wrap: wrap;
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .hero-title {
    font-size: 3.2rem;
  }

  .uc-layout,
  .gov-layout,
  .calc-layout {
    grid-template-columns: 1fr;
  }

  .arch-nodes.five-nodes {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 768px) {
  .nav {
    padding: 0 1rem;
  }

  .nav-inner {
    gap: 1rem;
    justify-content: space-between;
  }

  .nav-links {
    display: none;
  }

  .brand-sub {
    display: none;
  }

  .section {
    padding: 60px 1.5rem;
  }

  .hero {
    padding: 100px 1.5rem 60px;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-sub {
    font-size: 1rem;
  }

  .hero-stats {
    gap: 1rem;
    flex-direction: column;
    align-items: center;
  }

  .stat-divider {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--border);
    padding-top: 1rem;
    width: 80%;
  }

  .problem-grid {
    grid-template-columns: 1fr;
  }

  .tier-grid {
    grid-template-columns: 1fr;
  }

  .exec-grid {
    grid-template-columns: 1fr;
  }

  .arch-row {
    flex-direction: column;
  }

  .arch-nodes {
    flex-direction: column;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
    justify-content: center;
  }

  .footer-meta {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-ctas {
    flex-direction: column;
    width: 100%;
  }

  .hero-ctas a {
    width: 100%;
    text-align: center;
  }

  .section-header h2 {
    font-size: 1.5rem;
  }

  .uc-tabs {
    flex-direction: column;
    width: 100%;
  }

  .uc-tab {
    text-align: center;
  }

  .code-tabs {
    flex-direction: column;
  }

  .gov-btn-row {
    flex-direction: column;
  }
}

/* ── Utility animations ── */
@keyframes countUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.anim {
  animation: countUp 0.6s ease both;
}
/*  Mobile Overflow Fixes  */
.uc-layout > div, .gov-layout > div, .calc-layout > div { min-width: 0; }

@media (max-width: 768px) {
  .uc-panel { padding: 1.5rem; }
  .gov-theorem-card, .gov-status-card { padding: 1.5rem; }
}

@media (max-width: 480px) {
  .section { padding: 50px 1rem; }
  .uc-panel { padding: 1.25rem; }
  .gov-theorem-card, .gov-status-card { padding: 1.25rem; }
  .code-block { padding: 1rem; }
}