/* =========================================
   A-BTP CONSTRUCTION - Feuille de style globale
   Style : BTP robuste (jaune chantier / noir / gris béton)
   ========================================= */

/* --- RESET & BASE --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #1A1A1A;
  background: #FFFFFF;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s ease; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* --- VARIABLES --- */
:root {
  --jaune: #FFB800;
  --jaune-fonce: #E6A500;
  --noir: #1A1A1A;
  --gris-beton: #4A4A4A;
  --gris-clair: #F5F5F5;
  --gris-bordure: #E0E0E0;
  --blanc: #FFFFFF;
  --rouge-cta: #E63946;
  --max-width: 1280px;
  --padding-section: 80px 24px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,.08);
  --shadow-md: 0 8px 24px rgba(0,0,0,.12);
  --shadow-lg: 0 20px 50px rgba(0,0,0,.18);
}

/* --- TYPOGRAPHIE --- */
h1, h2, h3, h4 {
  font-family: 'Oswald', 'Inter', sans-serif;
  font-weight: 700;
  line-height: 1.15;
  text-transform: uppercase;
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2.2rem, 5vw, 4rem); }
h2 { font-size: clamp(1.8rem, 4vw, 3rem); margin-bottom: 1rem; }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.6rem); margin-bottom: .75rem; }
p { margin-bottom: 1rem; }
.section-eyebrow {
  display: inline-block;
  font-size: .85rem;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--jaune-fonce);
  border-left: 4px solid var(--jaune);
  padding-left: 12px;
  margin-bottom: 16px;
}

/* --- LAYOUT --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
section { padding: var(--padding-section); }
.section-dark { background: var(--noir); color: var(--blanc); }
.section-dark h1, .section-dark h2, .section-dark h3 { color: var(--blanc); }
.section-dark .section-eyebrow { color: var(--jaune); }
.section-light { background: var(--gris-clair); }

/* --- BOUTONS --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 32px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: .9rem;
  transition: all .25s ease;
  border: 2px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--jaune);
  color: var(--noir);
  border-color: var(--jaune);
}
.btn-primary:hover {
  background: var(--noir);
  color: var(--jaune);
  border-color: var(--jaune);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.btn-secondary {
  background: transparent;
  color: var(--blanc);
  border-color: var(--blanc);
}
.btn-secondary:hover {
  background: var(--blanc);
  color: var(--noir);
}
.btn-dark {
  background: var(--noir);
  color: var(--blanc);
  border-color: var(--noir);
}
.btn-dark:hover {
  background: var(--jaune);
  color: var(--noir);
  border-color: var(--jaune);
}
.btn-arrow::after {
  content: '\2192';
  display: inline-block;
  transition: transform .25s ease;
}
.btn:hover .btn-arrow::after, .btn-arrow:hover::after { transform: translateX(4px); }

/* --- BARRE D'ALERTE TOP --- */
.topbar {
  background: var(--noir);
  color: var(--blanc);
  font-size: .85rem;
  padding: 8px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.topbar-info { display: flex; gap: 24px; flex-wrap: wrap; }
.topbar-info span { display: inline-flex; align-items: center; gap: 6px; }
.topbar-info .icon { color: var(--jaune); }
.topbar-cta { color: var(--jaune); font-weight: 600; }

/* --- HEADER / NAVIGATION --- */
.header {
  background: var(--blanc);
  border-bottom: 1px solid var(--gris-bordure);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}
.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo img {
  height: 56px;
  width: auto;
  display: block;
}
.logo-footer img {
  height: 90px;
  background: white;
  padding: 10px;
}
.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}
.nav-links a {
  font-weight: 600;
  font-size: .95rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  position: relative;
  padding: 6px 0;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 3px;
  background: var(--jaune);
  transition: width .25s ease;
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-links a.active { color: var(--noir); }
.nav-cta { background: var(--jaune); color: var(--noir); padding: 10px 22px; font-weight: 700; }
.nav-cta:hover { background: var(--noir); color: var(--jaune); }
.nav-cta::after { display: none !important; }
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}
.menu-toggle span {
  display: block;
  width: 26px;
  height: 3px;
  background: var(--noir);
  transition: all .3s ease;
}

/* --- HERO --- */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, rgba(26,26,26,.85), rgba(26,26,26,.65)),
              url('https://images.unsplash.com/photo-1503387762-592deb58ef4e?w=1920&q=80') center/cover;
  color: var(--blanc);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 80px;
  background: var(--jaune);
  clip-path: polygon(0 100%, 100% 100%, 100% 0, 0 60%);
}
.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 80px 24px 120px;
  width: 100%;
  position: relative;
  z-index: 2;
}
.hero h1 { color: var(--blanc); margin-bottom: 24px; max-width: 900px; }
.hero h1 span { color: var(--jaune); }
.hero p {
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  max-width: 650px;
  margin-bottom: 40px;
  color: rgba(255,255,255,.9);
}
.hero-ctas { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-badge {
  display: inline-block;
  background: var(--jaune);
  color: var(--noir);
  padding: 6px 16px;
  font-size: .8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .12em;
  margin-bottom: 24px;
}

/* --- HERO COMPACT (pages internes) --- */
.hero-compact {
  background: linear-gradient(135deg, rgba(26,26,26,.92), rgba(26,26,26,.75)),
              url('https://images.unsplash.com/photo-1541888946425-d81bb19240f5?w=1920&q=80') center/cover;
  color: var(--blanc);
  padding: 100px 24px 80px;
  text-align: center;
  position: relative;
}
.hero-compact h1 { color: var(--blanc); margin-bottom: 12px; }
.breadcrumb {
  font-size: .9rem;
  color: rgba(255,255,255,.75);
  letter-spacing: .05em;
}
.breadcrumb a:hover { color: var(--jaune); }
.breadcrumb span { color: var(--jaune); }

/* --- CHIFFRES CLES --- */
.stats {
  background: var(--jaune);
  padding: 60px 24px;
}
.stats-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  text-align: center;
}
.stat-num {
  font-family: 'Oswald', sans-serif;
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--noir);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-label {
  font-size: .9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--noir);
}

/* --- SECTION SERVICES --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 48px;
}
.service-card {
  background: var(--blanc);
  padding: 40px 32px;
  border-top: 4px solid var(--jaune);
  box-shadow: var(--shadow-sm);
  transition: all .3s ease;
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 0;
  background: var(--noir);
  transition: height .35s ease;
  z-index: 0;
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.service-card:hover::before { height: 100%; }
.service-card:hover * { color: var(--blanc); position: relative; z-index: 1; }
.service-card:hover .service-icon { background: var(--jaune); color: var(--noir); }
.service-icon {
  width: 64px;
  height: 64px;
  background: var(--noir);
  color: var(--jaune);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 24px;
  transition: all .3s ease;
  position: relative;
  z-index: 1;
}
.service-card h3 { position: relative; z-index: 1; }
.service-card p { color: var(--gris-beton); position: relative; z-index: 1; }
.service-card .more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: .9rem;
  text-transform: uppercase;
  margin-top: 16px;
  color: var(--jaune-fonce);
  position: relative;
  z-index: 1;
}
.service-card:hover .more { color: var(--jaune); }

/* --- POURQUOI NOUS --- */
.why-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.why-image {
  background: url('https://images.unsplash.com/photo-1504307651254-35680f356dfd?w=1200&q=80') center/cover;
  min-height: 500px;
  position: relative;
}
.why-image::before {
  content: '';
  position: absolute;
  bottom: -20px;
  right: -20px;
  width: 120px;
  height: 120px;
  background: var(--jaune);
  z-index: -1;
}
.why-list { margin-top: 32px; }
.why-item {
  display: flex;
  gap: 20px;
  margin-bottom: 28px;
  align-items: flex-start;
}
.why-num {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--jaune);
  color: var(--noir);
  font-family: 'Oswald', sans-serif;
  font-weight: 700;
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.why-item h4 {
  font-family: 'Oswald', sans-serif;
  font-size: 1.15rem;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.why-item p { color: var(--gris-beton); margin-bottom: 0; }

/* --- BANDEAU CTA --- */
.cta-band {
  background: linear-gradient(135deg, rgba(26,26,26,.92), rgba(26,26,26,.85)),
              url('https://images.unsplash.com/photo-1581094794329-c8112a89af12?w=1920&q=80') center/cover;
  color: var(--blanc);
  padding: 80px 24px;
  text-align: center;
}
.cta-band h2 { color: var(--blanc); margin-bottom: 16px; max-width: 800px; margin-left: auto; margin-right: auto; }
.cta-band h2 span { color: var(--jaune); }
.cta-band p { max-width: 640px; margin: 0 auto 32px; font-size: 1.1rem; color: rgba(255,255,255,.85); }

/* --- REALISATIONS / GALERIE --- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 48px;
}
.project-card {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: pointer;
}
.project-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.project-card:hover img { transform: scale(1.08); }
.project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(26,26,26,.92) 0%, rgba(26,26,26,.4) 60%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 28px;
  color: var(--blanc);
  opacity: 0;
  transition: opacity .3s ease;
}
.project-card:hover .project-overlay { opacity: 1; }
.project-cat {
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .15em;
  color: var(--jaune);
  margin-bottom: 8px;
}
.project-title { font-family: 'Oswald', sans-serif; font-size: 1.3rem; text-transform: uppercase; }

.filters {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 40px;
}
.filter-btn {
  padding: 10px 22px;
  border: 2px solid var(--noir);
  background: var(--blanc);
  font-weight: 600;
  font-size: .85rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  transition: all .2s ease;
}
.filter-btn:hover, .filter-btn.active { background: var(--noir); color: var(--jaune); }

/* --- TEMOIGNAGES --- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
  margin-top: 48px;
}
.testimonial {
  background: var(--blanc);
  padding: 36px;
  border-left: 4px solid var(--jaune);
  position: relative;
}
.testimonial::before {
  content: '\201C';
  font-family: 'Oswald', serif;
  font-size: 5rem;
  color: var(--jaune);
  position: absolute;
  top: 0;
  right: 24px;
  line-height: 1;
  opacity: .35;
}
.testimonial p { font-style: italic; color: var(--gris-beton); margin-bottom: 20px; }
.testimonial-author { font-weight: 700; }
.testimonial-role { font-size: .85rem; color: var(--gris-beton); }

/* --- A PROPOS - VALEURS --- */
.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  margin-top: 48px;
}
.value-card {
  text-align: center;
  padding: 32px 20px;
  border: 2px solid var(--gris-bordure);
  transition: all .25s ease;
}
.value-card:hover { border-color: var(--jaune); background: var(--gris-clair); transform: translateY(-4px); }
.value-icon {
  width: 70px;
  height: 70px;
  background: var(--noir);
  color: var(--jaune);
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
}
.value-card h3 { font-size: 1.1rem; }

/* --- EQUIPE --- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-top: 48px;
}
.team-member { text-align: center; }
.team-photo {
  aspect-ratio: 1;
  background: var(--gris-clair);
  margin-bottom: 16px;
  position: relative;
  overflow: hidden;
}
.team-photo img { width: 100%; height: 100%; object-fit: cover; }
.team-photo::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: var(--jaune);
}
.team-member h4 {
  font-family: 'Oswald', sans-serif;
  font-size: 1.1rem;
  text-transform: uppercase;
  margin-bottom: 4px;
}
.team-role { font-size: .9rem; color: var(--gris-beton); }

/* --- CONTACT --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 48px;
}
.contact-info { background: var(--noir); color: var(--blanc); padding: 48px; }
.contact-info h2 { color: var(--blanc); }
.contact-info .section-eyebrow { color: var(--jaune); }
.contact-block {
  display: flex;
  gap: 16px;
  margin: 24px 0;
  align-items: flex-start;
}
.contact-icon {
  width: 44px;
  height: 44px;
  background: var(--jaune);
  color: var(--noir);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.contact-block h4 { font-family: 'Oswald', sans-serif; font-size: 1rem; margin-bottom: 4px; }
.contact-block p { margin-bottom: 0; color: rgba(255,255,255,.8); font-size: .95rem; }

.contact-form {
  background: var(--blanc);
  padding: 48px;
  box-shadow: var(--shadow-md);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-weight: 600;
  font-size: .85rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-bottom: 8px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid var(--gris-bordure);
  font-family: inherit;
  font-size: 1rem;
  background: var(--gris-clair);
  transition: border-color .2s ease;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--jaune);
  background: var(--blanc);
}
.form-group textarea { resize: vertical; min-height: 140px; }
.form-submit { width: 100%; justify-content: center; }

/* --- FOOTER --- */
.footer {
  background: var(--noir);
  color: rgba(255,255,255,.75);
  padding: 64px 24px 24px;
}
.footer-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer h4 {
  color: var(--blanc);
  font-family: 'Oswald', sans-serif;
  font-size: 1.05rem;
  text-transform: uppercase;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 12px;
}
.footer h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 3px;
  background: var(--jaune);
}
.footer-about p { font-size: .9rem; line-height: 1.7; margin-top: 16px; }
.footer-links a, .footer-contact p {
  display: block;
  padding: 6px 0;
  font-size: .9rem;
  transition: color .2s ease;
}
.footer-links a:hover { color: var(--jaune); }
.footer-contact p { margin-bottom: 0; }
.footer-contact strong { color: var(--blanc); display: block; margin-top: 12px; margin-bottom: 4px; font-size: .8rem; text-transform: uppercase; letter-spacing: .1em; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 24px;
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: .85rem;
}
.social-links { display: flex; gap: 12px; }
.social-links a {
  width: 36px;
  height: 36px;
  background: rgba(255,255,255,.08);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .25s ease;
}
.social-links a:hover { background: var(--jaune); color: var(--noir); }

/* --- RESPONSIVE --- */
@media (max-width: 900px) {
  .menu-toggle { display: flex; }
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--blanc);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    box-shadow: var(--shadow-md);
    transform: translateY(-110%);
    transition: transform .3s ease;
    border-top: 4px solid var(--jaune);
  }
  .nav-links.open { transform: translateY(0); }
  .why-grid { grid-template-columns: 1fr; gap: 40px; }
  .why-image { min-height: 320px; }
  .contact-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .form-row { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  section { padding: 60px 20px; }
  .hero { min-height: 70vh; }
  .hero-inner { padding: 60px 20px 100px; }
  .footer-grid { grid-template-columns: 1fr; }
  .topbar-info { font-size: .75rem; gap: 12px; }
  .contact-info, .contact-form { padding: 32px 24px; }
  .btn { padding: 14px 24px; font-size: .85rem; }
}

/* --- ANIMATIONS --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeInUp .8s ease both; }
.fade-in.delay-1 { animation-delay: .15s; }
.fade-in.delay-2 { animation-delay: .3s; }
.fade-in.delay-3 { animation-delay: .45s; }

/* --- BOUTON WHATSAPP FLOTTANT --- */
@keyframes wa-pulse {
  0%   { box-shadow: 0 4px 16px rgba(37,211,102,.45), 0 0 0 0 rgba(37,211,102,.55); }
  70%  { box-shadow: 0 4px 16px rgba(37,211,102,.45), 0 0 0 22px rgba(37,211,102,0); }
  100% { box-shadow: 0 4px 16px rgba(37,211,102,.45), 0 0 0 0 rgba(37,211,102,0); }
}
@keyframes wa-bounce-in {
  0%   { opacity: 0; transform: translateY(20px) scale(.6); }
  60%  { o
/* --- BOUTON WHATSAPP FLOTTANT --- */
@keyframes wa-pulse{0%{box-shadow:0 4px 16px rgba(37,211,102,.45),0 0 0 0 rgba(37,211,102,.55)}70%{box-shadow:0 4px 16px rgba(37,211,102,.45),0 0 0 22px rgba(37,211,102,0)}100%{box-shadow:0 4px 16px rgba(37,211,102,.45),0 0 0 0 rgba(37,211,102,0)}}.whatsapp-float{position:fixed;bottom:24px;right:24px;z-index:999;display:flex;align-items:center;gap:12px}.whatsapp-float-label{background:#1A1A1A;color:#fff;padding:10px 16px;font-size:.85rem;font-weight:600;border-radius:4px;white-space:nowrap;box-shadow:0 4px 12px rgba(0,0,0,.2);opacity:0;transform:translateX(20px);pointer-events:none;transition:all .3s ease}.whatsapp-float:hover .whatsapp-float-label{opacity:1;transform:translateX(0)}.whatsapp-float-btn{width:64px;height:64px;border-radius:50%;background:#25D366;display:flex;align-items:center;justify-content:center;color:#fff;text-decoration:none;animation:wa-pulse 2.5s infinite;transition:all .25s ease;flex-shrink:0}.whatsapp-float-btn:hover{background:#128C7E;transform:scale(1.08)}.whatsapp-float-btn svg{width:34px;height:34px;fill:#fff}@media(max-width:600px){.whatsapp-float{bottom:16px;right:16px}.whatsapp-float-btn{width:56px;height:56px}.whatsapp-float-btn svg{width:30px;height:30px}.whatsapp-float-label{display:none}}