@import url("tokens.css");
@import url("https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@400;600;700;800&family=Roboto:wght@300;400;500;700&display=swap");

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.65;
  min-height: 100vh;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* === VISUAL PLACEHOLDER === */
.visual-placeholder {
  display: block;
  width: 100%;
  border-radius: 8px;
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(
      135deg,
      color-mix(in srgb, var(--color-primary) 22%, var(--color-bg)) 0%,
      color-mix(in srgb, var(--color-primary) 10%, var(--color-bg)) 55%,
      color-mix(in srgb, var(--color-secondary) 18%, var(--color-bg)) 100%
    );
}
.visual-placeholder[data-aspect="4:3"]  { aspect-ratio: 4 / 3; }
.visual-placeholder[data-aspect="1:1"]  { aspect-ratio: 1 / 1; }
.visual-placeholder[data-aspect="3:4"]  { aspect-ratio: 3 / 4; }
.visual-placeholder[data-aspect="21:9"] { aspect-ratio: 21 / 9; }

.visual-placeholder[data-tone="secondary"] {
  background:
    linear-gradient(
      135deg,
      color-mix(in srgb, var(--color-secondary) 22%, var(--color-bg)) 0%,
      color-mix(in srgb, var(--color-secondary) 10%, var(--color-bg)) 55%,
      color-mix(in srgb, var(--color-primary) 16%, var(--color-bg)) 100%
    );
}
.visual-placeholder[data-tone="accent"] {
  background:
    linear-gradient(
      135deg,
      color-mix(in srgb, var(--color-accent, var(--color-primary)) 22%, var(--color-bg)) 0%,
      color-mix(in srgb, var(--color-primary) 12%, var(--color-bg)) 60%,
      color-mix(in srgb, var(--color-secondary) 16%, var(--color-bg)) 100%
    );
}
.visual-placeholder[data-tone="muted"] {
  background: color-mix(in srgb, var(--color-text) 8%, var(--color-bg));
}

/* === TYPOGRAPHY === */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-primary);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

h1 { font-size: clamp(2rem, 6vw, 3.5rem); }
h2 { font-size: clamp(1.6rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
h4 { font-size: 1.2rem; font-weight: 700; }

p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

.lead {
  font-size: 1.15rem;
  font-weight: 400;
  line-height: 1.75;
  color: #334155;
}

/* === LAYOUT === */
.container {
  width: 100%;
  max-width: 1100px;
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.section { padding-block: 4rem; }
.section--dark {
  background-color: var(--color-primary);
  color: #E2E8F0;
}
.section--dark h1,
.section--dark h2,
.section--dark h3 { color: #FFFFFF; }

.section--light-gray {
  background-color: #F1F5F9;
}

.section-label {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  display: block;
  margin-bottom: 0.5rem;
}

.section-title { margin-bottom: 1.5rem; }

/* === HEADER / NAV === */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-primary);
  box-shadow: 0 2px 12px rgba(0,0,0,0.18);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 1rem;
}

.site-logo img, .site-logo svg {
  height: 44px;
  width: auto;
}

.nav-list {
  display: none;
  flex-direction: row;
  gap: 0.25rem;
}

.nav-list a {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #CBD5E1;
  padding: 0.5rem 0.85rem;
  border-radius: 4px;
  transition: color 0.2s, background 0.2s;
}

.nav-list a:hover,
.nav-list a[aria-current="page"] {
  color: #FFFFFF;
  background: rgba(249,115,22,0.15);
}

.nav-list a[aria-current="page"] {
  color: var(--color-accent);
}

.header-cta {
  display: none;
  align-items: center;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: 4px;
  padding: 0.6rem 1.25rem;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, background 0.2s;
  border: 2px solid transparent;
  text-decoration: none;
}

.btn:active { transform: translateY(1px); }

.btn--primary {
  background-color: var(--color-accent);
  color: #FFFFFF;
  border-color: var(--color-accent);
}
.btn--primary:hover {
  background-color: #EA6A00;
  border-color: #EA6A00;
  box-shadow: 0 4px 16px rgba(249,115,22,0.35);
}

.btn--outline {
  background: transparent;
  color: #FFFFFF;
  border-color: rgba(255,255,255,0.5);
}
.btn--outline:hover {
  border-color: #FFFFFF;
  background: rgba(255,255,255,0.08);
}

.btn--dark {
  background: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
}
.btn--dark:hover {
  background: #0F1E2E;
  box-shadow: 0 4px 16px rgba(26,41,56,0.3);
}

.btn--lg { font-size: 1.15rem; padding: 0.8rem 2rem; }

/* Hamburger */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  width: 44px;
  height: 44px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: #FFFFFF;
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav overlay */
.nav-mobile {
  display: none;
  position: fixed;
  inset: 68px 0 0 0;
  background: var(--color-primary);
  z-index: 99;
  flex-direction: column;
  padding: 2rem 1.5rem;
  gap: 0.5rem;
  overflow-y: auto;
}

.nav-mobile.is-open { display: flex; }

.nav-mobile a {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #CBD5E1;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  display: block;
}

.nav-mobile a[aria-current="page"],
.nav-mobile a:hover { color: var(--color-accent); }

.nav-mobile .btn {
  margin-top: 1.5rem;
  width: 100%;
  justify-content: center;
}

/* === HERO === */
.hero {
  background: var(--color-primary);
  color: #FFFFFF;
  padding-block: 5rem 3.5rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(249,115,22,0.08) 0%, transparent 60%),
    repeating-linear-gradient(
      -45deg,
      rgba(255,255,255,0.015) 0px,
      rgba(255,255,255,0.015) 1px,
      transparent 1px,
      transparent 12px
    );
  pointer-events: none;
}

.hero .container { position: relative; z-index: 1; }

.hero-eyebrow {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.hero-eyebrow::before {
  content: "";
  display: inline-block;
  width: 28px;
  height: 2px;
  background: var(--color-accent);
  flex-shrink: 0;
}

.hero h1 {
  color: #FFFFFF;
  margin-bottom: 1.25rem;
  max-width: 700px;
}

.hero h1 em {
  font-style: normal;
  color: var(--color-accent);
}

.hero-intro {
  max-width: 580px;
  color: #CBD5E1;
  font-size: 1.05rem;
  margin-bottom: 2rem;
  line-height: 1.75;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 3rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid rgba(255,255,255,0.12);
}

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

.stat-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  display: block;
}

.stat-label {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #94A3B8;
  display: block;
  margin-top: 0.3rem;
}

/* === SERVICES CARDS === */
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.service-card {
  background: #FFFFFF;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid #E2E8F0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  transition: box-shadow 0.2s, transform 0.2s;
}

.service-card:hover {
  box-shadow: 0 8px 24px rgba(26,41,56,0.12);
  transform: translateY(-2px);
}

.service-card-img { position: relative; }
.service-card-body { padding: 1.25rem; }

.service-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--color-primary);
}

.service-card p {
  font-size: 0.95rem;
  color: #475569;
  margin: 0;
}

.service-icon {
  width: 44px;
  height: 44px;
  background: var(--color-accent);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.75rem;
}

.service-icon svg { width: 24px; height: 24px; fill: #FFFFFF; }

/* === WHY US SECTION === */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.feature-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.feature-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: rgba(249,115,22,0.12);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-icon svg { width: 24px; height: 24px; stroke: var(--color-accent); fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.feature-body h4 { font-size: 1.05rem; margin-bottom: 0.25rem; color: var(--color-primary); text-transform: none; }
.feature-body p { font-size: 0.9rem; color: #475569; margin: 0; }

/* === REALISATIONS GALLERY === */
.gallery-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2rem;
}

/* === CTA BAND === */
.cta-band {
  background: var(--color-accent);
  padding-block: 3rem;
  text-align: center;
}

.cta-band h2 {
  color: #FFFFFF;
  margin-bottom: 0.75rem;
  font-size: clamp(1.4rem, 4vw, 2.2rem);
}

.cta-band p {
  color: rgba(255,255,255,0.9);
  font-size: 1rem;
  margin-bottom: 1.75rem;
}

.cta-band .btn--outline {
  border-color: rgba(255,255,255,0.7);
  color: #FFFFFF;
}

.cta-band .cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

/* === CONTACT === */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-top: 2.5rem;
}

.contact-info { }

.contact-detail {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.contact-detail-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background: rgba(249,115,22,0.1);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-detail-icon svg { width: 20px; height: 20px; stroke: var(--color-accent); fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.contact-detail strong { display: block; font-weight: 700; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-primary); margin-bottom: 0.15rem; }
.contact-detail span, .contact-detail a { font-size: 0.95rem; color: #475569; }
.contact-detail a:hover { color: var(--color-accent); }

.map-container {
  border-radius: 8px;
  overflow: hidden;
  border: 2px solid #E2E8F0;
  margin-top: 1.5rem;
  aspect-ratio: 16/9;
}

.map-container iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

/* === FORM === */
.contact-form { }

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.35rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border: 2px solid #CBD5E1;
  border-radius: 6px;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text);
  background: #F8FAFC;
  transition: border-color 0.2s, box-shadow 0.2s;
  -webkit-appearance: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(249,115,22,0.15);
  background: #FFFFFF;
}

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

.form-submit { margin-top: 1.5rem; }
.form-submit .btn { width: 100%; justify-content: center; }

.form-note {
  font-size: 0.8rem;
  color: #64748B;
  margin-top: 0.75rem;
  text-align: center;
}

/* === A-PROPOS === */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-top: 2.5rem;
  align-items: start;
}

.key-fact {
  background: var(--color-primary);
  color: #FFFFFF;
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  border-left: 4px solid var(--color-accent);
  margin-bottom: 1rem;
}

.key-fact strong {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-accent);
  display: block;
  line-height: 1;
  margin-bottom: 0.25rem;
}

.key-fact span {
  font-size: 0.85rem;
  color: #94A3B8;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.about-facts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2rem;
}

/* === MENTIONS LÉGALES === */
.legal-content {
  max-width: 780px;
  padding-block: 3rem;
}

.legal-content h2 { margin: 2rem 0 0.75rem; font-size: 1.25rem; }
.legal-content p, .legal-content li { font-size: 0.95rem; color: #374151; }
.legal-content ul { list-style: disc; padding-left: 1.5rem; }
.legal-content ul li { margin-bottom: 0.3rem; }

/* === FOOTER === */
.site-footer {
  background: #0F1E2E;
  color: #94A3B8;
  padding-block: 3rem;
}

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

.footer-brand .site-logo img { height: 40px; margin-bottom: 0.75rem; }
.footer-brand p { font-size: 0.9rem; line-height: 1.6; color: #64748B; }

.footer-links h4 {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #CBD5E1;
  margin-bottom: 0.75rem;
}

.footer-links ul { display: flex; flex-direction: column; gap: 0.4rem; }
.footer-links a { font-size: 0.9rem; color: #64748B; transition: color 0.2s; }
.footer-links a:hover { color: var(--color-accent); }

.footer-tel {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-accent);
  display: inline-block;
  margin-top: 0.5rem;
  letter-spacing: 0.05em;
}

.footer-bottom {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: #475569;
}

.footer-bottom a { color: #475569; }
.footer-bottom a:hover { color: var(--color-accent); }

/* === PAGE HERO (inner pages) === */
.page-hero {
  background: var(--color-primary);
  padding-block: 3.5rem 2.5rem;
  color: #FFFFFF;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    -45deg,
    rgba(255,255,255,0.015) 0px,
    rgba(255,255,255,0.015) 1px,
    transparent 1px,
    transparent 12px
  );
  pointer-events: none;
}

.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { color: #FFFFFF; margin-bottom: 0.75rem; }

.breadcrumb {
  font-size: 0.8rem;
  color: #64748B;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.breadcrumb a { color: #94A3B8; }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb span { color: #475569; }

/* === SERVICES DETAIL PAGE === */
.service-section {
  padding-block: 3.5rem;
  border-bottom: 1px solid #E2E8F0;
}

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

.service-detail-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 1.5rem;
  align-items: start;
}

.service-detail-list {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.service-detail-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.95rem;
  color: #374151;
}

.service-detail-list li::before {
  content: "";
  display: inline-block;
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23F97316' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center/contain no-repeat;
  margin-top: 2px;
}

/* === REALISATIONS === */
.realisations-intro {
  max-width: 620px;
  margin-bottom: 2.5rem;
}

.realisations-gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2rem;
}

.realisation-item { position: relative; }
.realisation-label {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: #475569;
  text-align: center;
}

/* === RESPONSIVE === */
@media (min-width: 640px) {
  .services-grid { grid-template-columns: 1fr 1fr; }
  .features-grid { grid-template-columns: 1fr 1fr; }
  .realisations-gallery { grid-template-columns: repeat(3, 1fr); }
  .gallery-grid { grid-template-columns: repeat(3, 1fr); }
  .hero-stats { gap: 2rem; }
  .stat-number { font-size: 3rem; }
}

@media (min-width: 768px) {
  .nav-toggle { display: none; }
  .nav-list { display: flex; }
  .header-cta { display: flex; }

  .about-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
  .service-detail-grid { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 1024px) {
  .services-grid { grid-template-columns: repeat(4, 1fr); }
  .about-facts-grid { grid-template-columns: repeat(4, 1fr); }
  .realisations-gallery { grid-template-columns: repeat(4, 1fr); }
}

/* === ACCESSIBILITY === */
:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Skip to content */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--color-accent);
  color: #FFFFFF;
  padding: 0.5rem 1rem;
  border-radius: 0 0 4px 4px;
  font-weight: 700;
  z-index: 200;
  transition: top 0.2s;
}

.skip-link:focus { top: 0; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* === MOTION PASS — Template A (atelier technique BTP) === */
@media (prefers-reduced-motion: no-preference) {

  /* 1. Hero entrance: staggered fade + rise on load */
  @keyframes adt-rise {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: translateY(0); }
  }
  .hero .hero-eyebrow,
  .hero h1,
  .hero-intro,
  .hero-ctas,
  .hero .visual-placeholder,
  .hero-stats {
    animation: adt-rise 520ms cubic-bezier(.2,.7,.2,1) both;
  }
  .hero h1          { animation-delay: 80ms; }
  .hero-intro       { animation-delay: 160ms; }
  .hero-ctas        { animation-delay: 240ms; }
  .hero .visual-placeholder { animation-delay: 320ms; }
  .hero-stats       { animation-delay: 400ms; }

  /* 2. Eyebrow decorative bar draws in — industrial "chantier ligne" */
  @keyframes adt-bar-draw {
    from { transform: scaleX(0); }
    to   { transform: scaleX(1); }
  }
  .hero-eyebrow::before {
    transform-origin: left center;
    animation: adt-bar-draw 600ms cubic-bezier(.7,0,.3,1) 200ms both;
  }

  /* 3. Section-label reveal (underline glide) on scroll-in via existing IO parent */
  .section-label {
    background-image: linear-gradient(currentColor, currentColor);
    background-repeat: no-repeat;
    background-size: 0% 2px;
    background-position: 0 100%;
    padding-bottom: 4px;
    transition: background-size 600ms cubic-bezier(.7,0,.3,1);
  }
  .section-label:hover,
  section:hover > .container > .section-label,
  .container:hover > .section-label {
    background-size: 42px 2px;
  }

  /* 4. Nav links: animated orange underline (sliding in) */
  .nav-list a {
    position: relative;
  }
  .nav-list a::after {
    content: "";
    position: absolute;
    left: 0.85rem;
    right: 0.85rem;
    bottom: 4px;
    height: 2px;
    background: var(--color-accent);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 260ms cubic-bezier(.7,0,.3,1);
  }
  .nav-list a:hover::after,
  .nav-list a:focus-visible::after,
  .nav-list a[aria-current="page"]::after {
    transform: scaleX(1);
  }

  /* 5. Service cards: soften existing hover, add top orange accent slide-in */
  .service-card {
    position: relative;
    transition: box-shadow 260ms ease, transform 260ms cubic-bezier(.2,.7,.2,1), border-color 260ms ease;
  }
  .service-card::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 3px;
    background: var(--color-accent);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 320ms cubic-bezier(.7,0,.3,1);
  }
  .service-card:hover {
    transform: translateY(-4px);
    border-color: color-mix(in srgb, var(--color-accent) 40%, #E2E8F0);
  }
  .service-card:hover::before { transform: scaleX(1); }
  .service-icon {
    transition: transform 260ms cubic-bezier(.2,.7,.2,1), box-shadow 260ms ease;
  }
  .service-card:hover .service-icon {
    transform: translateY(-2px) rotate(-3deg);
    box-shadow: 0 6px 16px rgba(249,115,22,0.35);
  }

  /* 6. Feature icons (pourquoi nous) : halo pulse on hover */
  .feature-item .feature-icon {
    transition: transform 260ms cubic-bezier(.2,.7,.2,1), background-color 260ms ease;
  }
  .feature-item:hover .feature-icon {
    transform: scale(1.08);
    background: rgba(249,115,22,0.22);
  }

  /* 7. Stat number: subtle punch-in when hero reveals */
  @keyframes adt-stat-pop {
    0%   { opacity: 0; transform: translateY(8px) scale(.92); }
    60%  { opacity: 1; transform: translateY(0) scale(1.04); }
    100% { opacity: 1; transform: translateY(0) scale(1); }
  }
  .hero-stats .stat-item {
    animation: adt-stat-pop 620ms cubic-bezier(.2,.7,.2,1) both;
  }
  .hero-stats .stat-item:nth-child(1) { animation-delay: 480ms; }
  .hero-stats .stat-item:nth-child(2) { animation-delay: 560ms; }
  .hero-stats .stat-item:nth-child(3) { animation-delay: 640ms; }

  /* 8. Visual placeholder: hover lift + gradient glide */
  .visual-placeholder {
    background-size: 180% 180%;
    background-position: 0% 0%;
    transition: transform 320ms cubic-bezier(.2,.7,.2,1),
                background-position 800ms cubic-bezier(.7,0,.3,1),
                box-shadow 320ms ease;
  }
  .visual-placeholder:hover {
    transform: translateY(-3px);
    background-position: 100% 100%;
    box-shadow: 0 10px 24px rgba(26,41,56,0.14);
  }

  /* 9. Buttons: firmer lift on hover — chantier "clic solide" */
  .btn { will-change: transform; }
  .btn--primary:hover,
  .btn--dark:hover { transform: translateY(-2px); }
  .btn--outline:hover { transform: translateY(-1px); }

  /* 10. CTA band: slow diagonal shine, purely decorative */
  .cta-band { position: relative; overflow: hidden; }
  .cta-band::after {
    content: "";
    position: absolute;
    top: -50%;
    left: -20%;
    width: 40%;
    height: 200%;
    background: linear-gradient(
      100deg,
      transparent 30%,
      rgba(255,255,255,0.10) 50%,
      transparent 70%
    );
    transform: translateX(-30%);
    animation: adt-shine 8s ease-in-out 2s infinite;
    pointer-events: none;
  }
  @keyframes adt-shine {
    0%, 100% { transform: translateX(-30%); opacity: 0; }
    40%      { opacity: 1; }
    60%      { transform: translateX(350%); opacity: 1; }
    61%      { opacity: 0; }
  }

  /* 11. Header CTA: accent-pulse focus ring — chantier signalétique */
  .btn--primary:focus-visible {
    outline: 3px solid #FFFFFF;
    outline-offset: 3px;
    box-shadow: 0 0 0 6px rgba(249,115,22,0.45);
  }

  /* 12. Inner page hero: staggered rise (services / réalisations / à propos / contact) */
  .page-hero .breadcrumb,
  .page-hero h1,
  .page-hero .hero-intro {
    animation: adt-rise 520ms cubic-bezier(.2,.7,.2,1) both;
  }
  .page-hero h1         { animation-delay: 80ms; }
  .page-hero .hero-intro { animation-delay: 180ms; }

  /* 13. Contact form fields: accent focus ring + label lift */
  .contact-form .form-group { position: relative; }
  .contact-form input,
  .contact-form textarea,
  .contact-form select {
    transition: border-color 220ms ease, box-shadow 220ms ease, transform 220ms cubic-bezier(.2,.7,.2,1);
  }
  .contact-form input:focus,
  .contact-form textarea:focus,
  .contact-form select:focus {
    box-shadow: 0 0 0 4px rgba(249,115,22,0.18);
    transform: translateY(-1px);
  }

  /* 14. Contact detail cards + map: soft lift on hover */
  .contact-detail,
  .map-container {
    transition: transform 260ms cubic-bezier(.2,.7,.2,1), box-shadow 260ms ease;
  }
  .contact-detail:hover { transform: translateY(-2px); }
  .map-container:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(26,41,56,0.14);
  }
  .contact-detail-icon {
    transition: transform 260ms cubic-bezier(.2,.7,.2,1), background-color 260ms ease;
  }
  .contact-detail:hover .contact-detail-icon {
    transform: rotate(-6deg) scale(1.05);
  }

  /* 15. Key facts (à propos) : underline draw on scroll-in */
  .key-fact {
    position: relative;
    transition: transform 260ms cubic-bezier(.2,.7,.2,1);
  }
  .key-fact::after {
    content: "";
    position: absolute;
    left: 0; bottom: 0;
    height: 2px;
    width: 100%;
    background: var(--color-accent);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 480ms cubic-bezier(.7,0,.3,1) 120ms;
  }
  .key-fact:hover { transform: translateY(-2px); }
  .key-fact:hover::after { transform: scaleX(1); }

  /* 16. Gallery placeholders: scroll-in reveal via IO (handled in main.js) */
  .gallery-grid .visual-placeholder[data-reveal] {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 480ms ease, transform 480ms cubic-bezier(.2,.7,.2,1);
  }
  .gallery-grid .visual-placeholder[data-reveal="in"] {
    opacity: 1;
    transform: translateY(0);
  }
}