/* ============================================================
   Mont Chambaix Cryogénie — Design Premium
   ============================================================ */

/* Variables CSS */
:root {
  --primary: #0a1628;
  --primary-light: #112240;
  --accent: #00b4d8;
  --accent-dark: #0096c7;
  --accent-light: #90e0ef;
  --gold: #c9a84c;
  --gold-light: #e8c97e;
  --white: #ffffff;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --text: #1e293b;
  --text-light: #475569;
  --text-muted: #94a3b8;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow: 0 4px 20px rgba(0,0,0,0.12);
  --shadow-md: 0 8px 40px rgba(0,0,0,0.16);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.20);
  --radius: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: 0.3s ease;
  --font-main: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --max-w: 1200px;
}

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-main);
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: color var(--transition); }
ul { list-style: none; }
button { cursor: pointer; font-family: var(--font-main); border: none; background: none; }

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
h1, h2, h3, h4, h5 { line-height: 1.2; font-weight: 700; color: var(--primary); }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }
h4 { font-size: 1.125rem; }
p { color: var(--text-light); line-height: 1.75; }
.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.section-title { margin-bottom: 1rem; }
.section-desc { max-width: 640px; margin: 0 auto 3rem; text-align: center; }
.text-center { text-align: center; }

/* ============================================================
   LAYOUT
   ============================================================ */
.container { width: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 1.5rem; }
.section { padding: 100px 0; }
.section-alt { background: var(--gray-50); }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 3rem; align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-1 { gap: 1rem; }
.gap-2 { gap: 2rem; }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: all var(--transition);
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0,180,216,0.4);
}
.btn-secondary {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,0.5);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--white);
  transform: translateY(-2px);
}
.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}
.btn-outline:hover {
  background: var(--accent);
  color: var(--white);
  transform: translateY(-2px);
}
.btn-gold {
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: var(--primary);
  font-weight: 700;
}
.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(201,168,76,0.4);
}

/* ============================================================
   HEADER / NAVIGATION
   ============================================================ */
#header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: all var(--transition);
  padding: 1rem 0;
}
#header.scrolled {
  background: var(--primary);
  padding: 0.75rem 0;
  box-shadow: var(--shadow-md);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.nav-logo {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.nav-logo-name {
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.01em;
}
.nav-logo-tag {
  font-size: 0.6875rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.nav-menu > li { position: relative; }
.nav-menu a {
  display: block;
  padding: 0.5rem 0.875rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.nav-menu a:hover, .nav-menu a.active {
  color: var(--white);
  background: rgba(255,255,255,0.1);
}
.nav-menu .has-dropdown:hover .dropdown { display: block; }
.dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  min-width: 220px;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 0.5rem;
  z-index: 100;
}
.dropdown a {
  color: var(--text);
  padding: 0.625rem 1rem;
  font-size: 0.875rem;
  border-radius: 6px;
  display: block;
}
.dropdown a:hover { background: var(--gray-50); color: var(--accent); }
.nav-cta { margin-left: 1rem; }
.nav-cta .btn { padding: 0.625rem 1.5rem; font-size: 0.875rem; }
#menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  cursor: pointer;
}
#menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ============================================================
   HERO SECTION
   ============================================================ */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--primary) 0%, #0d2044 40%, #071525 100%);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}
.hero-bg-circle {
  position: absolute;
  border-radius: 50%;
  opacity: 0.06;
  background: var(--accent);
}
.hero-bg-circle:nth-child(1) { width: 600px; height: 600px; top: -150px; right: -100px; }
.hero-bg-circle:nth-child(2) { width: 400px; height: 400px; bottom: -100px; left: -100px; opacity: 0.04; }
.hero-bg-line {
  position: absolute;
  opacity: 0.05;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}
.hero-bg-line:nth-child(3) { width: 100%; height: 1px; top: 30%; }
.hero-bg-line:nth-child(4) { width: 1px; height: 100%; left: 60%; background: linear-gradient(180deg, transparent, var(--accent), transparent); }
.particles {
  position: absolute;
  inset: 0;
}
.particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--accent);
  border-radius: 50%;
  opacity: 0;
  animation: floatParticle 8s infinite;
}
@keyframes floatParticle {
  0% { opacity: 0; transform: translateY(0) scale(0.5); }
  20% { opacity: 0.6; }
  80% { opacity: 0.2; }
  100% { opacity: 0; transform: translateY(-120px) scale(1); }
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 120px 0 80px;
  max-width: 780px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(0,180,216,0.15);
  border: 1px solid rgba(0,180,216,0.3);
  color: var(--accent-light);
  padding: 0.4rem 1rem;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}
.hero-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}
.hero-title { color: var(--white); margin-bottom: 1.25rem; }
.hero-title span { color: var(--accent); }
.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.125rem);
  color: rgba(255,255,255,0.7);
  max-width: 600px;
  margin-bottom: 2.5rem;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3.5rem;
}
.hero-phone {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--accent-light);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: color var(--transition);
}
.hero-phone:hover { color: var(--white); }
.hero-phone-icon {
  width: 44px;
  height: 44px;
  background: rgba(0,180,216,0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  border: 1px solid rgba(0,180,216,0.4);
}
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid rgba(255,255,255,0.1);
}
.hero-stat-num {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
}
.hero-stat-num span { color: var(--accent); }
.hero-stat-label {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.5);
  margin-top: 0.25rem;
}

/* ============================================================
   TRUST BAR
   ============================================================ */
#trust-bar {
  background: var(--primary);
  padding: 1.25rem 0;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.trust-items {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  color: rgba(255,255,255,0.75);
  font-size: 0.875rem;
  font-weight: 500;
}
.trust-item-icon {
  color: var(--accent);
  font-size: 1rem;
  flex-shrink: 0;
}

/* ============================================================
   SERVICES CARDS
   ============================================================ */
.service-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-dark));
  transform: scaleX(0);
  transition: transform var(--transition);
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.service-card:hover::before { transform: scaleX(1); }
.service-card-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, rgba(0,180,216,0.15), rgba(0,150,199,0.1));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
  color: var(--accent);
  border: 1px solid rgba(0,180,216,0.2);
}
.service-card h3 { margin-bottom: 0.75rem; font-size: 1.125rem; }
.service-card p { font-size: 0.9375rem; margin-bottom: 1.25rem; }
.service-card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  color: var(--accent);
  font-size: 0.875rem;
  font-weight: 600;
  transition: gap var(--transition);
}
.service-card-link:hover { gap: 0.625rem; }

/* ============================================================
   ABOUT SECTION
   ============================================================ */
.about-text { padding: 2rem 0; }
.about-text h2 { margin-bottom: 1.5rem; }
.about-text p { margin-bottom: 1.25rem; }
.about-values {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 2rem 0;
}
.about-value-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.4rem 0.875rem;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: 50px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--primary);
}
.about-value-tag span { color: var(--accent); }
.about-visual {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  height: 480px;
  background: linear-gradient(135deg, var(--primary), #0d2044);
  display: flex;
  align-items: center;
  justify-content: center;
}
.about-visual-inner {
  text-align: center;
  color: white;
  padding: 2rem;
}
.about-visual-icon {
  font-size: 5rem;
  margin-bottom: 1.5rem;
  filter: drop-shadow(0 0 30px rgba(0,180,216,0.5));
}
.about-visual-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: white;
  margin-bottom: 0.75rem;
}
.about-visual-sub { color: rgba(255,255,255,0.6); font-size: 0.9375rem; }
.about-badge {
  position: absolute;
  bottom: 2rem;
  right: 2rem;
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: var(--primary);
  padding: 1rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 0.875rem;
  text-align: center;
  box-shadow: var(--shadow-md);
}
.about-badge-num { font-size: 1.75rem; display: block; }

/* ============================================================
   STATS COUNTER
   ============================================================ */
#stats {
  background: linear-gradient(135deg, var(--primary), #0d2044);
  padding: 80px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}
.stat-item { text-align: center; }
.stat-num {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1;
  margin-bottom: 0.5rem;
}
.stat-num span { color: var(--accent); }
.stat-label {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.6);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ============================================================
   REALIZATIONS
   ============================================================ */
.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: 2.5rem;
}
.filter-tab {
  padding: 0.5rem 1.25rem;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  background: var(--gray-100);
  color: var(--gray-600);
  border: 2px solid transparent;
}
.filter-tab.active, .filter-tab:hover {
  background: var(--accent);
  color: var(--white);
}
.realizations-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.real-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  transition: all var(--transition);
}
.real-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.real-card-img {
  height: 200px;
  background: linear-gradient(135deg, var(--primary), #0d2044);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}
.real-card-body { padding: 1.25rem; }
.real-card-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(0,180,216,0.1);
  color: var(--accent);
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}
.real-card h4 { margin-bottom: 0.375rem; font-size: 1rem; }
.real-card p { font-size: 0.875rem; color: var(--text-muted); }

/* ============================================================
   TESTIMONIALS
   ============================================================ */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.testimonial-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: all var(--transition);
}
.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.testimonial-stars {
  color: #f59e0b;
  font-size: 0.875rem;
  margin-bottom: 1rem;
  letter-spacing: 0.1em;
}
.testimonial-text {
  font-style: italic;
  margin-bottom: 1.25rem;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text-light);
}
.testimonial-text::before { content: '"'; }
.testimonial-text::after { content: '"'; }
.testimonial-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--gray-100);
}
.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--primary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 0.875rem;
  flex-shrink: 0;
}
.testimonial-name { font-weight: 600; font-size: 0.875rem; color: var(--primary); }
.testimonial-role { font-size: 0.75rem; color: var(--text-muted); }
.testimonial-location { font-size: 0.75rem; color: var(--accent); }

/* ============================================================
   ZONES MAP
   ============================================================ */
.zones-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}
.zone-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  text-align: center;
  transition: all var(--transition);
  text-decoration: none;
}
.zone-card:hover {
  background: var(--accent);
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.zone-card:hover h4, .zone-card:hover p { color: white; }
.zone-card h4 { font-size: 1rem; margin-bottom: 0.25rem; }
.zone-card p { font-size: 0.8125rem; color: var(--text-muted); }
.zone-card-primary { background: var(--primary); border-color: var(--primary); }
.zone-card-primary h4, .zone-card-primary p { color: white; }
.zone-card-primary:hover { background: var(--primary-light); border-color: var(--primary-light); }

/* ============================================================
   CONTACT / DEVIS
   ============================================================ */
#contact {
  background: linear-gradient(135deg, var(--primary) 0%, #0d2044 100%);
}
#contact h2, #contact .section-label { color: var(--white); }
#contact .section-desc { color: rgba(255,255,255,0.7); }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 4rem;
  align-items: start;
}
.contact-info h3 { color: var(--white); font-size: 1.375rem; margin-bottom: 1.5rem; }
.contact-detail {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.contact-detail-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(0,180,216,0.15);
  border: 1px solid rgba(0,180,216,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1.125rem;
  flex-shrink: 0;
}
.contact-detail-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.5);
  margin-bottom: 0.25rem;
}
.contact-detail-value {
  color: var(--white);
  font-weight: 600;
  font-size: 1.0625rem;
}
.contact-detail-value a {
  color: var(--white);
  transition: color var(--transition);
}
.contact-detail-value a:hover { color: var(--accent); }
.contact-reassurance {
  margin-top: 2rem;
  padding: 1.25rem;
  background: rgba(255,255,255,0.06);
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.1);
}
.contact-reassurance-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: rgba(255,255,255,0.75);
  font-size: 0.875rem;
  padding: 0.375rem 0;
}
.contact-reassurance-item span { color: var(--accent); font-size: 0.875rem; }

/* Form */
.form-wrapper {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
}
.form-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.375rem;
}
.form-subtitle {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { margin-bottom: 1rem; }
.form-group.full { grid-column: 1 / -1; }
label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 0.375rem;
}
input, select, textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius);
  font-family: var(--font-main);
  font-size: 0.9375rem;
  color: var(--text);
  background: var(--white);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,180,216,0.15);
}
textarea { resize: vertical; min-height: 120px; }
.form-submit { margin-top: 0.5rem; }
.form-submit .btn { width: 100%; justify-content: center; padding: 1rem 2rem; }
.form-success {
  display: none;
  text-align: center;
  padding: 2rem;
}
.form-success-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}
.form-success h3 { color: var(--primary); margin-bottom: 0.5rem; }
.form-success p { font-size: 0.9375rem; }

/* ============================================================
   FAQ
   ============================================================ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  overflow: hidden;
}
.faq-question {
  width: 100%;
  text-align: left;
  padding: 1.25rem 1.5rem;
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  cursor: pointer;
  background: var(--white);
  transition: background var(--transition);
}
.faq-question:hover { background: var(--gray-50); }
.faq-question.open { background: var(--primary); color: var(--white); }
.faq-icon { font-size: 1.25rem; flex-shrink: 0; transition: transform var(--transition); }
.faq-question.open .faq-icon { 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: 500px; }
.faq-answer-inner {
  padding: 1.25rem 1.5rem;
  font-size: 0.9375rem;
  color: var(--text-light);
  border-top: 1px solid var(--gray-100);
  line-height: 1.7;
}

/* ============================================================
   PAGE INTÉRIEURE (bannière)
   ============================================================ */
.page-hero {
  background: linear-gradient(135deg, var(--primary) 0%, #0d2044 100%);
  padding: 160px 0 80px;
  text-align: center;
}
.page-hero h1 { color: var(--white); margin-bottom: 1rem; }
.page-hero .hero-subtitle { margin: 0 auto; text-align: center; }
.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.5);
  margin-top: 1.5rem;
}
.breadcrumb a { color: rgba(255,255,255,0.7); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { color: rgba(255,255,255,0.35); }

/* ============================================================
   SERVICE PAGE
   ============================================================ */
.service-detail-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 4rem;
  align-items: start;
}
.service-content h2 { font-size: 1.75rem; margin-bottom: 1rem; }
.service-content h3 { font-size: 1.25rem; margin: 2rem 0 0.75rem; color: var(--primary); }
.service-content p { margin-bottom: 1.25rem; }
.service-content ul { padding-left: 0; margin-bottom: 1.5rem; }
.service-content ul li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.5rem 0;
  color: var(--text-light);
  font-size: 0.9375rem;
}
.service-content ul li::before {
  content: '✓';
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 0.125rem;
}
.service-sidebar { position: sticky; top: 100px; }
.sidebar-card {
  background: var(--primary);
  border-radius: var(--radius-lg);
  padding: 2rem;
  color: white;
  margin-bottom: 1.5rem;
}
.sidebar-card h3 { color: white; font-size: 1.125rem; margin-bottom: 1rem; }
.sidebar-card p { color: rgba(255,255,255,0.7); font-size: 0.875rem; margin-bottom: 1.5rem; }
.sidebar-contact-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.sidebar-contact-item a { color: var(--accent-light); font-weight: 600; }
.sidebar-card .btn { width: 100%; justify-content: center; margin-top: 1rem; }
.sidebar-services-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}
.sidebar-services-card h4 { font-size: 0.875rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); margin-bottom: 1rem; }
.sidebar-services-list li { margin-bottom: 0.5rem; }
.sidebar-services-list a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 0.875rem;
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition);
}
.sidebar-services-list a:hover, .sidebar-services-list a.current {
  background: var(--gray-50);
  color: var(--accent);
}
.sidebar-services-list a span { flex-shrink: 0; }

/* ============================================================
   FOOTER
   ============================================================ */
#footer {
  background: var(--gray-900);
  padding: 80px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  padding-bottom: 3rem;
}
.footer-brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 0.25rem;
}
.footer-brand-tag {
  font-size: 0.6875rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 1.25rem;
}
.footer-brand-desc {
  color: var(--gray-400);
  font-size: 0.875rem;
  line-height: 1.75;
  margin-bottom: 1.5rem;
}
.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--gray-400);
  font-size: 0.875rem;
  margin-bottom: 0.75rem;
}
.footer-contact-item a { color: var(--gray-300); transition: color var(--transition); }
.footer-contact-item a:hover { color: var(--accent); }
.footer-contact-item-icon { color: var(--accent); flex-shrink: 0; font-size: 0.875rem; }
.footer-col-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray-500);
  margin-bottom: 1.25rem;
}
.footer-links li { margin-bottom: 0.5rem; }
.footer-links a {
  color: var(--gray-400);
  font-size: 0.875rem;
  transition: color var(--transition);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.footer-links a:hover { color: var(--accent); }
.footer-links a::before {
  content: '›';
  color: var(--gray-600);
  transition: color var(--transition);
}
.footer-links a:hover::before { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 1.25rem 0;
}
.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-copy {
  color: var(--gray-500);
  font-size: 0.8125rem;
}
.footer-bottom-links {
  display: flex;
  gap: 1.5rem;
}
.footer-bottom-links a {
  color: var(--gray-500);
  font-size: 0.8125rem;
  transition: color var(--transition);
}
.footer-bottom-links a:hover { color: var(--gray-300); }

/* ============================================================
   CTA SECTION
   ============================================================ */
.cta-section {
  background: linear-gradient(135deg, var(--accent-dark) 0%, var(--accent) 100%);
  padding: 80px 0;
  text-align: center;
}
.cta-section h2 { color: var(--white); margin-bottom: 1rem; }
.cta-section p { color: rgba(255,255,255,0.85); max-width: 560px; margin: 0 auto 2rem; }

/* ============================================================
   LOCAL PAGE SPECIFIC
   ============================================================ */
.local-hero-tag {
  display: inline-block;
  background: rgba(0,180,216,0.2);
  color: var(--accent-light);
  padding: 0.375rem 1rem;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  border: 1px solid rgba(0,180,216,0.3);
}
.local-cities {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.5rem 0;
}
.local-city-tag {
  padding: 0.375rem 0.875rem;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  color: rgba(255,255,255,0.7);
  border-radius: 50px;
  font-size: 0.8125rem;
  font-weight: 500;
}
.local-city-tag.main {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

/* ============================================================
   PROCESS STEPS
   ============================================================ */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  position: relative;
}
.process-steps::before {
  content: '';
  position: absolute;
  top: 28px;
  left: calc(12.5% + 14px);
  right: calc(12.5% + 14px);
  height: 2px;
  background: var(--gray-200);
  z-index: 0;
}
.process-step { text-align: center; position: relative; z-index: 1; }
.process-step-num {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  font-weight: 800;
  font-size: 1.125rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  position: relative;
  z-index: 1;
  box-shadow: 0 4px 15px rgba(0,180,216,0.4);
}
.process-step h4 { margin-bottom: 0.5rem; font-size: 0.9375rem; }
.process-step p { font-size: 0.875rem; color: var(--text-muted); }

/* ============================================================
   BACK TO TOP
   ============================================================ */
#back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  background: var(--accent);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  box-shadow: var(--shadow-md);
  z-index: 500;
}
#back-to-top.visible { opacity: 1; visibility: visible; }
#back-to-top:hover { transform: translateY(-3px); background: var(--accent-dark); }

/* ============================================================
   MOBILE NAV OVERLAY
   ============================================================ */
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 800;
}
.nav-overlay.active { display: block; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .process-steps::before { display: none; }
  .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .service-detail-grid { grid-template-columns: 1fr; }
  .service-sidebar { position: static; }
}

@media (max-width: 768px) {
  .section { padding: 70px 0; }
  .grid-2 { grid-template-columns: 1fr; gap: 2rem; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-3.two-col { grid-template-columns: 1fr 1fr; }
  .realizations-grid { grid-template-columns: 1fr 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 1.5rem; }
  #menu-toggle { display: flex; }
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    bottom: 0;
    width: min(320px, 85vw);
    background: var(--primary);
    flex-direction: column;
    align-items: flex-start;
    padding: 5rem 1.5rem 2rem;
    gap: 0.25rem;
    z-index: 900;
    transition: right 0.35s ease;
    overflow-y: auto;
  }
  .nav-menu.open { right: 0; }
  .nav-menu > li { width: 100%; }
  .nav-menu a { padding: 0.75rem 1rem; font-size: 0.9375rem; }
  .dropdown {
    position: static;
    display: block;
    box-shadow: none;
    background: rgba(255,255,255,0.05);
    border-radius: var(--radius);
    padding: 0.25rem 0.5rem;
    margin-top: 0.25rem;
  }
  .dropdown a { color: rgba(255,255,255,0.7); }
  .dropdown a:hover { background: rgba(255,255,255,0.08); color: var(--accent); }
  .nav-cta { width: 100%; margin-left: 0; margin-top: 1rem; }
  .nav-cta .btn { width: 100%; justify-content: center; }
}

@media (max-width: 600px) {
  .realizations-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .trust-items { flex-direction: column; gap: 1rem; }
  .zones-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .hero-actions .btn { width: 100%; justify-content: center; }
}