/* ═══════════════════════════════════════════════════════════════
   CELLIX — STYLESHEET
   Variables → Reset → Base → Navbar → Hero → Services →
   Pourquoi → Contact → Devis → Footer → Animations → Responsive
════════════════════════════════════════════════════════════════ */

/* ── VARIABLES ──────────────────────────────────────────────── */
:root {
  --nuit:       #0A0F1E;
  --electron:   #00D4FF;
  --cellule:    #00FF88;
  --profond:    #1A2540;
  --clair:      #F0F6FF;
  --border:     #D0DFFF;
  --text-muted: #8899BB;
  --white:      #FFFFFF;

  --font-title: 'Exo 2', 'Arial Black', Arial, sans-serif;
  --font-body:  'Inter', 'Roboto', sans-serif;

  --radius-sm:  8px;
  --radius-md:  16px;
  --radius-pill: 20px;

  --shadow-card-hover: 0 8px 32px rgba(0, 212, 255, 0.15);
  --glow-subtle:       0 0 20px rgba(0, 212, 255, 0.15);

  --nav-height: 72px;
  --transition: 0.3s ease;
}

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

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

body {
  font-family: var(--font-body);
  color: var(--white);
  background: var(--nuit);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; }

a {
  color: inherit;
  text-decoration: none;
}

ul { list-style: none; }

/* Utility */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── SECTION HEADERS ────────────────────────────────────────── */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-title {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(28px, 4vw, 40px);
  letter-spacing: -0.5px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title.dark  { color: var(--nuit); }
.section-title.light { color: var(--white); }

.section-sub {
  font-size: 16px;
  line-height: 1.6;
}

.section-sub.dark  { color: var(--text-muted); }
.section-sub.light { color: var(--text-muted); }

/* ── NAVBAR ─────────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(10, 15, 30, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 212, 255, 0.08);
  transition: background var(--transition);
}

.navbar.scrolled {
  background: rgba(10, 15, 30, 0.97);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Logo */
.logo {
  display: flex;
  flex-direction: column;
  line-height: 1;
  gap: 2px;
}

.logo-img {
  display: block;
  height: 52px;
  width: auto;
  object-fit: contain;
  transition: transform var(--transition);
}

.logo:hover .logo-img {
  transform: scale(1.04);
}

.logo-main {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 24px;
  color: var(--white);
  letter-spacing: -0.5px;
}

.logo-accent { color: var(--electron); }

.logo-sub {
  font-size: 9px;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* Nav links */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.75);
  transition: color var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--electron);
  transition: width var(--transition);
}

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

.nav-link:hover::after {
  width: 100%;
}

.btn-cta-nav {
  font-size: 13px;
  font-weight: 700;
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  background: var(--electron);
  color: var(--nuit);
  transition: opacity var(--transition), transform var(--transition);
  white-space: nowrap;
}

.btn-cta-nav:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

/* Burger */
.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 6px;
  z-index: 1001;
}

.burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
  transform-origin: center;
}

/* Burger open state */
.burger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.burger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.burger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── HERO ───────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--nav-height) + 48px) 24px 80px;
  background-image: url('https://images.unsplash.com/photo-1593941707882-a5bba14938c7?w=1600');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 15, 30, 0.78);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 840px;
  width: 100%;
}

/* Badge */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid var(--electron);
  color: var(--electron);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.badge-icon { font-size: 14px; }

/* Title */
.hero-title {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 56px;
  line-height: 1.1;
  letter-spacing: -0.5px;
  color: var(--white);
  text-transform: uppercase;
  margin-bottom: 24px;
}

/* Sub */
.hero-sub {
  font-size: 18px;
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 40px;
}

/* Buttons */
.hero-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  background: var(--electron);
  color: var(--nuit);
  font-weight: 700;
  font-size: 15px;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn-primary:hover {
  opacity: 0.92;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 212, 255, 0.35);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  border: 2px solid rgba(255, 255, 255, 0.3);
  color: var(--white);
  font-weight: 600;
  font-size: 15px;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.6);
  transform: translateY(-2px);
}

/* Stats */
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: 32px 40px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(0, 212, 255, 0.12);
  border-radius: var(--radius-md);
  backdrop-filter: blur(8px);
  flex-wrap: wrap;
  gap: 0;
}

.stat-item {
  flex: 1;
  min-width: 140px;
  text-align: center;
  padding: 8px 16px;
}

.stat-number {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 40px;
  color: var(--electron);
  line-height: 1;
}

.stat-plus,
.stat-percent {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 28px;
  color: var(--electron);
}

.stat-label {
  display: block;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-divider {
  width: 1px;
  height: 48px;
  background: rgba(0, 212, 255, 0.2);
  flex-shrink: 0;
}

/* ── SERVICES ───────────────────────────────────────────────── */
.services {
  padding: 96px 0;
  background: var(--clair);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--white);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 36px 32px;
  transition: box-shadow var(--transition), transform var(--transition);
  cursor: default;
}

.service-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.card-icon {
  margin-bottom: 20px;
}

.card-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 14px;
}

.badge-blue {
  background: rgba(0, 212, 255, 0.1);
  color: var(--electron);
  border: 1px solid rgba(0, 212, 255, 0.25);
}

.badge-green {
  background: rgba(0, 255, 136, 0.1);
  color: var(--cellule);
  border: 1px solid rgba(0, 255, 136, 0.25);
}

.card-title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 20px;
  color: var(--nuit);
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}

.card-desc {
  font-size: 14px;
  line-height: 1.7;
  color: #4A5A7A;
  margin-bottom: 20px;
}

.card-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--electron);
  transition: gap var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.card-link:hover {
  gap: 8px;
}

/* ── MARQUES & MODÈLES ──────────────────────────────────────── */
.marques {
  padding: 96px 0;
  background: var(--white);
}

.marques-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.marques-column {
  background: var(--clair);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 36px 32px;
  transition: box-shadow var(--transition);
}

.marques-column:hover {
  box-shadow: var(--shadow-card-hover);
}

.marques-column-header {
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.marques-column-title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 22px;
  color: var(--nuit);
  margin-top: 10px;
  letter-spacing: -0.3px;
}

.brand-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.brand-item {
  padding: 14px 16px;
  background: var(--white);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--electron);
  transition: border-left-color var(--transition), transform var(--transition);
}

.brand-item:hover {
  border-left-color: var(--cellule);
  transform: translateX(4px);
}

.brand-name {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 16px;
  color: var(--nuit);
  margin-bottom: 4px;
  letter-spacing: -0.2px;
}

.brand-models {
  font-size: 13.5px;
  line-height: 1.6;
  color: #4A5A7A;
}

.marques-footer {
  text-align: center;
  margin-top: 48px;
  font-size: 15px;
  color: var(--text-muted);
}

.marques-footer a {
  color: var(--electron);
  font-weight: 600;
  border-bottom: 1px solid transparent;
  transition: border-bottom-color var(--transition);
}

.marques-footer a:hover {
  border-bottom-color: var(--electron);
}

/* ── POURQUOI CELLIX ────────────────────────────────────────── */
.pourquoi {
  padding: 96px 0;
  background: var(--nuit);
}

.arguments-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.argument {
  text-align: center;
  padding: 32px 20px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(0, 212, 255, 0.08);
  background: rgba(255, 255, 255, 0.02);
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.argument:hover {
  background: rgba(0, 212, 255, 0.04);
  border-color: rgba(0, 212, 255, 0.2);
  box-shadow: var(--glow-subtle);
}

.arg-icon {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}

.arg-title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 16px;
  color: var(--white);
  margin-bottom: 10px;
  letter-spacing: -0.3px;
}

.arg-desc {
  font-size: 13px;
  line-height: 1.65;
  color: var(--text-muted);
}

/* ── CONTACT ────────────────────────────────────────────────── */
.contact {
  padding: 96px 0;
  background: var(--profond);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-infos {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

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

.contact-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.15);
  border-radius: 10px;
}

.contact-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.contact-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--electron);
}

.contact-value {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.5;
  transition: color var(--transition);
}

a.contact-value:hover { color: var(--electron); }

/* Map */
.contact-map {
  border-radius: var(--radius-md);
  overflow: hidden;
  height: 360px;
  border: 1px solid rgba(0, 212, 255, 0.12);
}

.contact-map iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.map-placeholder {
  width: 100%;
  height: 100%;
  background: rgba(0, 212, 255, 0.04);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--text-muted);
  font-size: 14px;
}

.map-hint {
  font-size: 12px;
  color: rgba(136, 153, 187, 0.6);
  font-style: italic;
}

/* ── DEVIS ──────────────────────────────────────────────────── */
.devis {
  padding: 96px 0;
  background: var(--clair);
}

.devis-form {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-row.three-cols {
  grid-template-columns: 1fr 1fr 1fr;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group.half {
  max-width: 50%;
}

.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: #2A3A5A;
  letter-spacing: 0.3px;
}

.required { color: var(--electron); }

/* Inputs */
.devis-form input[type="text"],
.devis-form input[type="email"],
.devis-form input[type="tel"],
.devis-form input[type="number"],
.devis-form textarea {
  width: 100%;
  padding: 12px 14px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--nuit);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.devis-form input::placeholder,
.devis-form textarea::placeholder {
  color: #A0B0CC;
}

.devis-form input:focus,
.devis-form textarea:focus {
  border-color: var(--electron);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.15);
}

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

/* Radio */
.radio-group {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.radio-label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: 14px;
  color: var(--nuit);
  font-weight: 500;
}

.radio-label input[type="radio"] {
  display: none;
}

.radio-custom {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: border-color var(--transition);
  position: relative;
}

.radio-custom::after {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--electron);
  opacity: 0;
  transition: opacity var(--transition);
}

.radio-label input[type="radio"]:checked ~ .radio-custom {
  border-color: var(--electron);
}

.radio-label input[type="radio"]:checked ~ .radio-custom::after {
  opacity: 1;
}

/* Checkboxes */
.checkbox-group {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px 20px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: 14px;
  color: var(--nuit);
  font-weight: 500;
}

.checkbox-label input[type="checkbox"] {
  display: none;
}

.checkbox-custom {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  border: 2px solid var(--border);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition), background var(--transition);
  position: relative;
}

.checkbox-custom::after {
  content: '';
  width: 5px;
  height: 9px;
  border-right: 2px solid var(--nuit);
  border-bottom: 2px solid var(--nuit);
  transform: rotate(45deg) translateY(-1px);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.checkbox-label input[type="checkbox"]:checked ~ .checkbox-custom {
  border-color: var(--electron);
  background: var(--electron);
}

.checkbox-label input[type="checkbox"]:checked ~ .checkbox-custom::after {
  opacity: 1;
}

/* Feedback messages */
.form-message {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
}

.form-message.success {
  background: rgba(0, 200, 100, 0.1);
  border: 1px solid rgba(0, 200, 100, 0.4);
  color: #00A060;
}

.form-message.error {
  background: rgba(255, 80, 80, 0.08);
  border: 1px solid rgba(255, 80, 80, 0.35);
  color: #CC3030;
}

.form-message.error a {
  color: #CC3030;
  font-weight: 700;
  text-decoration: underline;
}

/* Submit button */
.btn-submit {
  width: 100%;
  padding: 16px 24px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--electron);
  color: var(--nuit);
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 8px;
}

.btn-submit:hover:not(:disabled) {
  opacity: 0.92;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 212, 255, 0.35);
}

.btn-submit:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
}

/* Spinner */
.spinner-svg {
  width: 18px;
  height: 18px;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ── FOOTER ─────────────────────────────────────────────────── */
.footer {
  background: var(--nuit);
  padding: 64px 0 0;
  border-top: 1px solid rgba(0, 212, 255, 0.08);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-brand .logo {
  display: inline-flex;
  flex-direction: column;
  margin-bottom: 16px;
}

.logo-img-footer {
  height: 64px;
}

.footer-tagline {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 8px;
}

.footer-heading {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--electron);
  margin-bottom: 16px;
}

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

.footer-links a {
  font-size: 13px;
  color: var(--text-muted);
  transition: color var(--transition);
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  font-size: 12px;
  color: rgba(136, 153, 187, 0.6);
  flex-wrap: wrap;
  gap: 12px;
}

.footer-legal {
  display: flex;
  gap: 24px;
}

.footer-legal a {
  color: rgba(136, 153, 187, 0.6);
  transition: color var(--transition);
}

.footer-legal a:hover { color: var(--text-muted); }

/* ── ANIMATIONS ─────────────────────────────────────────────── */

/* Fade-in used in hero (CSS-only, triggered by class) */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.7s ease forwards;
}

.delay-1 { animation-delay: 0.15s; }
.delay-2 { animation-delay: 0.3s; }
.delay-3 { animation-delay: 0.45s; }
.delay-4 { animation-delay: 0.6s; }

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

/* Scroll-reveal (JS-driven) */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Stagger children in grids */
.services-grid .service-card:nth-child(2) { transition-delay: 0.1s; }
.services-grid .service-card:nth-child(3) { transition-delay: 0.2s; }
.services-grid .service-card:nth-child(4) { transition-delay: 0.3s; }

.arguments-grid .argument:nth-child(2) { transition-delay: 0.1s; }
.arguments-grid .argument:nth-child(3) { transition-delay: 0.2s; }
.arguments-grid .argument:nth-child(4) { transition-delay: 0.3s; }

/* ── RESPONSIVE ─────────────────────────────────────────────── */

/* ── 1200px ── */
@media (max-width: 1200px) {
  .arguments-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

/* ── 768px ── */
@media (max-width: 768px) {

  /* Navbar */
  .burger { display: flex; }

  .logo-img { height: 44px; }
  .logo-img-footer { height: 56px; }

  .nav-menu {
    position: fixed;
    inset: 0;
    background: rgba(10, 15, 30, 0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 40px;
    transform: translateX(100%);
    transition: transform 0.35s ease;
    z-index: 999;
  }

  .nav-menu.open {
    transform: translateX(0);
  }

  .nav-link {
    font-size: 22px;
    color: var(--white);
  }

  .btn-cta-nav {
    font-size: 16px;
    padding: 12px 32px;
  }

  /* Hero */
  .hero {
    background-attachment: scroll;
    padding-top: calc(var(--nav-height) + 32px);
  }

  .hero-title { font-size: 32px; }
  .hero-sub   { font-size: 15px; }

  .hero-btns {
    flex-direction: column;
    align-items: center;
  }

  .hero-stats {
    flex-direction: column;
    gap: 0;
    padding: 24px;
  }

  .stat-divider {
    width: 80px;
    height: 1px;
    margin: 8px auto;
  }

  .stat-item { min-width: unset; }

  /* Services */
  .services-grid {
    grid-template-columns: 1fr;
  }

  /* Marques */
  .marques-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .marques-column {
    padding: 28px 24px;
  }

  /* Arguments */
  .arguments-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .argument {
    text-align: left;
    display: flex;
    flex-direction: row;
    gap: 16px;
    align-items: flex-start;
    padding: 24px;
  }

  .arg-icon { margin-bottom: 0; flex-shrink: 0; }

  /* Contact */
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .contact-map { height: 280px; }

  /* Devis form */
  .form-row,
  .form-row.three-cols {
    grid-template-columns: 1fr;
  }

  .form-group.half { max-width: 100%; }

  .checkbox-group {
    grid-template-columns: 1fr 1fr;
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand { grid-column: 1 / -1; }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

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

/* ── 480px ── */
@media (max-width: 480px) {
  .hero-title { font-size: 28px; }

  .checkbox-group {
    grid-template-columns: 1fr;
  }

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

  .section-title { font-size: 24px; }
}