/* ============================================================
   DataEntreprise — Feuille de style principale
   ============================================================ */

/* --- Variables & Reset --- */
:root {
  --color-bg: #050a14;
  --color-bg-2: #080f1e;
  --color-surface: #0d1a2e;
  --color-surface-2: #112240;
  --color-border: rgba(99, 179, 237, 0.12);
  --color-primary: #3b82f6;
  --color-primary-light: #60a5fa;
  --color-accent: #06b6d4;
  --color-accent-light: #22d3ee;
  --color-success: #10b981;
  --color-danger: #ef4444;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-text-dim: #64748b;
  --font-body: 'Inter', sans-serif;
  --font-heading: 'Space Grotesk', sans-serif;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 32px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.15);
  --transition: 0.25s ease;
  --max-width: 1200px;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  line-height: 1.25;
  color: #f1f5f9;
}

a { color: var(--color-primary-light); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent-light); }

img { max-width: 100%; display: block; }

ul { list-style: none; }

/* --- Utilities --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 64px;
}

.section-header h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  margin: 12px 0 20px;
}

.section-header p {
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

.section-tag {
  display: inline-block;
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: var(--color-primary-light);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 100px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hidden { display: none !important; }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-lg { padding: 15px 32px; font-size: 1rem; }

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(59, 130, 246, 0.45);
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.05);
  color: var(--color-text);
  border-color: rgba(99, 179, 237, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary-light);
  border: 1px solid rgba(59, 130, 246, 0.4);
}
.btn-outline:hover {
  background: rgba(59, 130, 246, 0.1);
  color: var(--color-primary-light);
}

/* ============================================================
   NAVIGATION
   ============================================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all var(--transition);
}

.navbar.scrolled {
  background: rgba(5, 10, 20, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  padding: 12px 0;
}

.nav-container {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  color: #f1f5f9;
  text-decoration: none;
}

.logo-icon {
  font-size: 1.5rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-accent { color: var(--color-accent-light); -webkit-text-fill-color: var(--color-accent-light); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav-links a {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.nav-links a:hover {
  color: var(--color-text);
  background: rgba(255,255,255,0.05);
}

.nav-cta { margin-left: 8px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59, 130, 246, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
}

.glow-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.3), transparent 70%);
  top: -200px;
  right: -100px;
}

.glow-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.2), transparent 70%);
  bottom: 0;
  left: -100px;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.25);
  color: var(--color-primary-light);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 24px;
}

.badge-dot {
  width: 6px;
  height: 6px;
  background: var(--color-success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.3); }
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--color-text-muted);
  max-width: 600px;
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-value {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--color-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--color-border);
}

/* ============================================================
   PROBLEM SECTION
   ============================================================ */
.section-problem { background: var(--color-bg-2); }

.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.problem-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
}

.problem-card:hover {
  border-color: rgba(99, 179, 237, 0.25);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.problem-card-highlight {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.08), rgba(239, 68, 68, 0.03));
  border-color: rgba(239, 68, 68, 0.2);
}

.problem-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.problem-card h3 {
  font-size: 1.1rem;
  margin-bottom: 12px;
  color: #f1f5f9;
}

.problem-card p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ============================================================
   SOLUTION / PILLARS
   ============================================================ */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.pillar-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  position: relative;
  transition: all var(--transition);
}

.pillar-card:hover {
  border-color: rgba(59, 130, 246, 0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.pillar-card-featured {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(6, 182, 212, 0.05));
  border-color: rgba(59, 130, 246, 0.3);
}

.pillar-number {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 800;
  color: rgba(59, 130, 246, 0.15);
  position: absolute;
  top: 24px;
  right: 28px;
  line-height: 1;
}

.pillar-icon {
  font-size: 2.5rem;
  margin-bottom: 20px;
}

.pillar-card h3 {
  font-size: 1.25rem;
  margin-bottom: 16px;
}

.pillar-card p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 24px;
  line-height: 1.7;
}

.pillar-features {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.pillar-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.pillar-features li::before {
  content: '✓';
  color: var(--color-success);
  font-weight: 700;
  flex-shrink: 0;
}

/* ============================================================
   ARCHITECTURE
   ============================================================ */
.section-architecture { background: var(--color-bg-2); }

.architecture-layout {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0;
  align-items: stretch;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 32px;
}

.arch-column {
  padding: 40px 32px;
}

.arch-offchain { background: rgba(100, 116, 139, 0.05); }
.arch-onchain { background: rgba(59, 130, 246, 0.05); }

.arch-column-header {
  margin-bottom: 32px;
}

.arch-column-header h3 {
  font-size: 1.1rem;
  margin-top: 8px;
}

.arch-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 100px;
}

.arch-badge-gray {
  background: rgba(100, 116, 139, 0.2);
  color: var(--color-text-muted);
  border: 1px solid rgba(100, 116, 139, 0.3);
}

.arch-badge-blue {
  background: rgba(59, 130, 246, 0.15);
  color: var(--color-primary-light);
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.arch-actors {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.arch-actor {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.actor-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.arch-actor strong {
  display: block;
  font-size: 0.9rem;
  color: #f1f5f9;
  margin-bottom: 4px;
}

.arch-actor p {
  font-size: 0.8rem;
  color: var(--color-text-dim);
  margin: 0;
}

.arch-bridge {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
  background: linear-gradient(180deg, rgba(59, 130, 246, 0.08), rgba(6, 182, 212, 0.05));
  border-left: 1px solid var(--color-border);
  border-right: 1px solid var(--color-border);
  min-width: 180px;
}

.bridge-label {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent-light);
  margin-bottom: 24px;
  text-align: center;
}

.bridge-steps {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  width: 100%;
}

.bridge-step {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  width: 100%;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.step-num {
  width: 22px;
  height: 22px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  flex-shrink: 0;
}

.bridge-arrow {
  color: var(--color-primary-light);
  font-size: 1.2rem;
  opacity: 0.5;
}

.arch-cta { text-align: center; }

/* ============================================================
   SCENARIOS
   ============================================================ */
.tab-buttons {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 6px;
  width: fit-content;
}

.tab-btn {
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}

.tab-btn.active {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
}

.tab-btn:hover:not(.active) {
  color: var(--color-text);
  background: rgba(255,255,255,0.05);
}

.scenario-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.scenario-col {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.scenario-before { border-color: rgba(239, 68, 68, 0.2); }
.scenario-after { border-color: rgba(16, 185, 129, 0.2); background: rgba(16, 185, 129, 0.03); }

.scenario-col h4 {
  font-size: 1rem;
  margin-bottom: 24px;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.8rem;
}

.timeline {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.tl-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.tl-time {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 100px;
  white-space: nowrap;
  flex-shrink: 0;
}

.tl-bad .tl-time {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
}

.tl-good .tl-time {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
}

.tl-item p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  padding-top: 2px;
}

.scenario-result {
  margin-top: 24px;
  padding: 16px 20px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--radius-md);
  color: #34d399;
  font-size: 0.9rem;
  font-weight: 600;
  text-align: center;
}

.scenario-result strong {
  font-size: 1.3rem;
  display: block;
  margin-bottom: 2px;
}

/* ============================================================
   MODEL
   ============================================================ */
.section-model { background: var(--color-bg-2); }

.model-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.model-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
}

.model-card:hover {
  border-color: rgba(59, 130, 246, 0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.model-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.model-card h3 {
  font-size: 1.05rem;
  margin-bottom: 12px;
}

.model-card p {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  line-height: 1.7;
}

/* ============================================================
   CTA SECTION
   ============================================================ */
.section-cta { background: var(--color-bg); }

.cta-box {
  position: relative;
  background: var(--color-surface);
  border: 1px solid rgba(59, 130, 246, 0.25);
  border-radius: var(--radius-xl);
  padding: 64px;
  text-align: center;
  overflow: hidden;
}

.cta-glow {
  position: absolute;
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(59, 130, 246, 0.12), transparent 70%);
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  pointer-events: none;
}

.cta-box .section-tag { margin-bottom: 16px; }

.cta-box h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-bottom: 16px;
}

.cta-box > p {
  color: var(--color-text-muted);
  max-width: 560px;
  margin: 0 auto 40px;
}

.cta-steps {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.cta-step {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  max-width: 220px;
  text-align: left;
}

.cta-step-num {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.cta-step p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  padding-top: 4px;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--color-bg-2);
  border-top: 1px solid var(--color-border);
  padding: 64px 0 0;
}

.footer-container {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .nav-logo {
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--color-text-dim);
  line-height: 1.7;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  font-size: 0.875rem;
  color: var(--color-text-dim);
  transition: color var(--transition);
}

.footer-col a:hover { color: var(--color-primary-light); }

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 24px 0;
}

.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: var(--color-text-dim);
}

.footer-disclaimer {
  font-style: italic;
  max-width: 400px;
  text-align: right;
}

/* ============================================================
   PAGES INTERNES — Styles communs
   ============================================================ */
.page-hero {
  padding: 140px 0 80px;
  background: var(--color-bg-2);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.page-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin: 12px 0 20px;
}

.page-hero p {
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.05rem;
}

.page-content {
  padding: 80px 0;
}

/* Table styles */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  margin: 32px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

thead th {
  background: var(--color-surface-2);
  padding: 14px 20px;
  text-align: left;
  font-weight: 600;
  color: var(--color-text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--color-border);
}

tbody td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
  line-height: 1.5;
}

tbody tr:last-child td { border-bottom: none; }

tbody tr:hover td { background: rgba(255,255,255,0.02); }

.badge-excellent {
  display: inline-block;
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 2px 10px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-good {
  display: inline-block;
  background: rgba(59, 130, 246, 0.15);
  color: var(--color-primary-light);
  border: 1px solid rgba(59, 130, 246, 0.3);
  padding: 2px 10px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-medium {
  display: inline-block;
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 2px 10px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
}

/* Contact form */
.contact-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 48px;
  max-width: 640px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  transition: border-color var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: rgba(59, 130, 246, 0.5);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

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

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

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .footer-container {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .footer-brand { grid-column: 1 / -1; }

  .architecture-layout {
    grid-template-columns: 1fr;
  }
  .arch-bridge {
    border-left: none;
    border-right: none;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    padding: 24px;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
  }
  .bridge-steps {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    width: auto;
  }
  .bridge-arrow { transform: rotate(-90deg); }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 65px;
    left: 0;
    right: 0;
    background: rgba(5, 10, 20, 0.97);
    backdrop-filter: blur(20px);
    padding: 24px;
    border-bottom: 1px solid var(--color-border);
    gap: 4px;
  }

  .nav-links.open + .nav-cta {
    display: block;
    position: fixed;
    top: auto;
    bottom: 24px;
    left: 24px;
    right: 24px;
    text-align: center;
  }

  .hero-stats { gap: 20px; }
  .stat-divider { display: none; }

  .scenario-comparison { grid-template-columns: 1fr; }

  .cta-box { padding: 40px 24px; }
  .cta-steps { flex-direction: column; align-items: center; }
  .cta-step { max-width: 100%; }

  .footer-container { grid-template-columns: 1fr; gap: 24px; }
  .footer-brand { grid-column: auto; }
  .footer-bottom .container { flex-direction: column; text-align: center; }
  .footer-disclaimer { text-align: center; }

  .form-row { grid-template-columns: 1fr; }
  .contact-form { padding: 32px 24px; }
}

@media (max-width: 480px) {
  .section { padding: 64px 0; }
  .hero { padding: 100px 0 60px; }
  .hero-actions { flex-direction: column; }
  .btn-lg { width: 100%; justify-content: center; }
  .pillars-grid, .problem-grid, .model-grid { grid-template-columns: 1fr; }
}