*{margin:0;padding:0;box-sizing:border-box}
:root{
  --blue:#1a3c6e;--blue2:#2563eb;--blue-light:#dbeafe;
  --orange:#f97316;--orange2:#ea580c;
  --gray:#f8fafc;--text:#1e293b;--muted:#64748b;
  --radius:12px;--shadow:0 4px 24px rgba(0,0,0,.10);
}
html{scroll-behavior:smooth}
body{font-family:'Segoe UI',system-ui,sans-serif;color:var(--text);line-height:1.6}
a{text-decoration:none;color:inherit}
img{max-width:100%}

/* NAV */
nav{position:fixed;top:0;left:0;right:0;z-index:999;background:#fff;box-shadow:0 2px 16px rgba(0,0,0,.08);padding:0 5%}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-size:1.25rem;font-weight:900;color:var(--blue);white-space:nowrap}
.logo svg{flex-shrink:0}
.nav-links{display:flex;gap:24px;list-style:none}
.nav-links a{font-size:.88rem;font-weight:600;color:var(--text);transition:color .2s}
.nav-links a:hover{color:var(--blue2)}
.nav-cta{display:flex;align-items:center;gap:12px}
.tel-btn{display:flex;align-items:center;gap:7px;background:var(--orange);color:#fff;padding:9px 16px;border-radius:50px;font-weight:700;font-size:.88rem;transition:background .2s;white-space:nowrap}
.tel-btn:hover{background:var(--orange2)}
.burger{display:none;flex-direction:column;gap:5px;cursor:pointer;border:none;background:none;padding:4px}
.burger span{display:block;width:24px;height:2px;background:var(--text);border-radius:2px;transition:.3s}
.mobile-menu{display:none;position:fixed;top:68px;left:0;right:0;background:#fff;padding:20px 5%;box-shadow:0 8px 24px rgba(0,0,0,.1);z-index:998;flex-direction:column;gap:14px}
.mobile-menu a{font-size:1rem;font-weight:600;color:var(--text);padding:8px 0;border-bottom:1px solid #e2e8f0}
.mobile-menu.open{display:flex}

/* Masquer le bouton téléphone sur mobile + tablette */
@media (max-width:1024px){
  .tel-btn{
    display: none;
  }
}

/* BACK TO TOP */
.back-top{position:fixed;bottom:90px;right:24px;z-index:900;background:var(--blue);color:#fff;width:46px;height:46px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 16px rgba(26,60,110,.4);transition:.3s;opacity:0;pointer-events:none;border:none;cursor:pointer}
.back-top.visible{opacity:1;pointer-events:all}
.back-top:hover{background:var(--blue2);transform:translateY(-2px)}

/* FLOAT TEL */
.float-tel{position:fixed;bottom:24px;right:24px;z-index:900;background:var(--orange);color:#fff;width:58px;height:58px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 20px rgba(249,115,22,.5);transition:.2s;animation:pulse 2s infinite}
.float-tel:hover{background:var(--orange2);transform:scale(1.08)}
@keyframes pulse{0%,100%{box-shadow:0 4px 20px rgba(249,115,22,.5)}50%{box-shadow:0 4px 32px rgba(249,115,22,.8)}}

/* BTN */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:50px;font-weight:700;font-size:1rem;cursor:pointer;border:none;transition:.2s}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange2);transform:translateY(-1px)}
.btn-outline{background:transparent;color:#fff;border:2px solid #fff}
.btn-outline:hover{background:rgba(255,255,255,.15)}
.btn-blue{background:var(--blue2);color:#fff}
.btn-blue:hover{background:var(--blue);transform:translateY(-1px)}

/* URGENCE BANNER */
.urgence{background:linear-gradient(90deg,var(--orange2),var(--orange));color:#fff;text-align:center;padding:12px 5%;font-weight:700;font-size:.9rem;display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap}
.urgence a{color:#fff;border-bottom:1px solid rgba(255,255,255,.5)}

/* HERO */
#accueil{padding-top:68px}
.hero{min-height:calc(100vh - 68px);background:linear-gradient(135deg,var(--blue) 0%,#1e4d8c 50%,#1a3c6e 100%);display:flex;align-items:center;padding:60px 5%;position:relative;overflow:hidden}
.hero-inner{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;max-width:1200px;margin:0 auto;width:100%;position:relative;z-index:1}
.hero::before{content:'';position:absolute;right:-100px;top:-100px;width:500px;height:500px;background:radial-gradient(circle,rgba(37,99,235,.3) 0%,transparent 70%);border-radius:50%}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.12);color:#fff;padding:7px 16px;border-radius:50px;font-size:.85rem;font-weight:600;margin-bottom:24px;backdrop-filter:blur(4px)}
.hero-badge::before{content:'';display:block;width:8px;height:8px;background:#4ade80;border-radius:50%;animation:blink 1.5s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.3}}
.hero h1{font-size:clamp(1.8rem,3.5vw,3rem);color:#fff;font-weight:900;line-height:1.15;margin-bottom:20px}
.hero h1 span{color:var(--orange)}
.hero p{color:rgba(255,255,255,.82);font-size:1.05rem;margin-bottom:36px}
.hero-btns{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:40px}
.hero-stats{display:flex;gap:24px;flex-wrap:wrap}
.stat{color:#fff}
.stat strong{display:block;font-size:1.7rem;font-weight:900;color:var(--orange)}
.stat span{font-size:.8rem;opacity:.75}
.hero-image{border-radius:20px;overflow:hidden;box-shadow:0 24px 64px rgba(0,0,0,.4);position:relative}
.hero-image img{width:100%;height:420px;object-fit:cover;display:block}
.hero-image-badge{position:absolute;bottom:20px;left:20px;background:rgba(255,255,255,.95);border-radius:12px;padding:12px 18px;display:flex;align-items:center;gap:10px;box-shadow:0 4px 16px rgba(0,0,0,.15)}
.hero-image-badge strong{font-size:.85rem;font-weight:800;color:var(--blue);display:block}
.hero-image-badge span{font-size:.75rem;color:var(--muted)}

/* SECTIONS */
section{padding:80px 2%}
.section-label{display:inline-block;background:var(--blue-light);color:var(--blue2);font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;padding:5px 14px;border-radius:50px;margin-bottom:14px}
.section-title{font-size:clamp(1.6rem,3vw,2.2rem);font-weight:900;color:var(--blue);margin-bottom:12px}
.section-sub{color:var(--muted);font-size:1rem;max-width:560px}
.center{text-align:center}
.center .section-sub{margin:0 auto}

/* SERVICES — 3 par ligne */
#services{background:var(--gray)}
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:48px}
.service-card{background:#fff;border-radius:var(--radius);padding:28px 24px;box-shadow:var(--shadow);transition:.3s;border:2px solid transparent;cursor:default}
.service-card:hover{border-color:var(--blue2);transform:translateY(-4px);box-shadow:0 8px 32px rgba(37,99,235,.12)}
.service-icon{width:52px;height:52px;background:var(--blue-light);border-radius:14px;display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.service-card h3{font-size:1.05rem;font-weight:800;color:var(--blue);margin-bottom:8px}
.service-card p{color:var(--muted);font-size:.88rem}
.service-tag{display:inline-block;margin-top:12px;background:#fef3c7;color:#d97706;font-size:.75rem;font-weight:700;padding:3px 10px;border-radius:50px}

/* POURQUOI */
#pourquoi{background:#fff}
.why-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;margin-top:48px}
.why-visual{background:linear-gradient(135deg,var(--blue),var(--blue2));border-radius:20px;padding:36px;color:#fff;position:relative;overflow:hidden}
.why-visual::after{content:'';position:absolute;bottom:-40px;right:-40px;width:160px;height:160px;background:rgba(255,255,255,.08);border-radius:50%}
.why-visual h3{font-size:1.3rem;font-weight:900;margin-bottom:20px}

/* CERTIFICATIONS LOGOS */
.cert-logos{display:flex;flex-direction:column;gap:12px}
.cert-logo-item{display:flex;align-items:center;gap:12px;background:rgba(255,255,255,.12);border-radius:10px;padding:10px 14px;backdrop-filter:blur(4px)}
.cert-logo-item img{width:48px;height:32px;object-fit:contain;border-radius:4px;background:#fff;padding:3px;flex-shrink:0}
.cert-logo-item span{font-size:.82rem;font-weight:600;opacity:.95;line-height:1.3}
.cert-aids{margin-top:20px;padding-top:18px;border-top:1px solid rgba(255,255,255,.15)}
.cert-aids p{font-size:.82rem;opacity:.7;margin-bottom:10px}
.cert-aids-tags{display:flex;flex-wrap:wrap;gap:8px}
.cert-aids-tags span{background:rgba(255,255,255,.12);padding:5px 12px;border-radius:20px;font-size:.78rem}

.why-items{display:flex;flex-direction:column;gap:22px}
.why-item{display:flex;gap:16px;align-items:flex-start}
.why-item-icon{width:44px;height:44px;background:var(--blue-light);border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.why-item h4{font-size:1rem;font-weight:700;color:var(--blue);margin-bottom:4px}
.why-item p{font-size:.88rem;color:var(--muted)}

/* AVIS */
#avis{background:var(--gray)}
.avis-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(380px,1fr));gap:24px;margin-top:48px}
.avis-card{background:#fff;border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.stars{color:#f59e0b;font-size:1.1rem;margin-bottom:14px}
.avis-card p{color:var(--text);font-size:.92rem;line-height:1.7;font-style:italic;margin-bottom:18px}
.avis-author{display:flex;align-items:center;gap:12px}
.avis-avatar{width:42px;height:42px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.95rem;color:#fff;flex-shrink:0}
.avis-author-info strong{display:block;font-size:.9rem;font-weight:700}
.avis-author-info span{font-size:.78rem;color:var(--muted)}
.google-badge{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid #e2e8f0;border-radius:50px;padding:8px 18px;margin-bottom:32px;box-shadow:0 2px 8px rgba(0,0,0,.06)}
.google-badge span{font-weight:700;font-size:.9rem}
.rating-big{font-size:2.4rem;font-weight:900;color:var(--blue);margin-right:4px}

/* ZONE */
#zone{background:#fff}
.zone-inner{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start;margin-top:48px}
.zone-list{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px}
.zone-item{display:flex;align-items:center;gap:8px;font-size:.9rem;font-weight:600;color:var(--blue)}
.zone-item::before{content:'📍';font-size:.8rem}
.map-placeholder{background:linear-gradient(135deg,#e0f2fe,#bfdbfe);border-radius:var(--radius);height:300px;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:12px;font-size:1rem;font-weight:700;color:var(--blue2)}

/* DEVIS */
#devis{background:linear-gradient(135deg,var(--blue) 0%,#1e4d8c 100%)}
.devis-inner{max-width:680px;margin:0 auto}
.devis-inner .section-label{background:rgba(255,255,255,.15);color:#fff}
.devis-inner .section-title{color:#fff}
.devis-inner .section-sub{color:rgba(255,255,255,.75)}
form{margin-top:36px;display:flex;flex-direction:column;gap:18px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
label{display:flex;flex-direction:column;gap:6px;font-size:.85rem;font-weight:600;color:rgba(255,255,255,.85)}
input,select,textarea{background:rgba(255,255,255,.1);border:1.5px solid rgba(255,255,255,.2);border-radius:10px;padding:13px 16px;color:#fff;font-size:.95rem;font-family:inherit;transition:.2s;outline:none}
input::placeholder,textarea::placeholder{color:rgba(255,255,255,.45)}
input:focus,select:focus,textarea:focus{border-color:var(--orange);background:rgba(255,255,255,.15)}
select option{background:var(--blue);color:#fff}
textarea{resize:vertical;min-height:110px}
.form-submit{text-align:center;margin-top:8px}
.btn-submit{background:var(--orange);color:#fff;border:none;padding:16px 40px;border-radius:50px;font-size:1.05rem;font-weight:800;cursor:pointer;transition:.2s;display:inline-flex;align-items:center;gap:10px}
.btn-submit:hover{background:var(--orange2);transform:translateY(-2px);box-shadow:0 8px 24px rgba(249,115,22,.4)}
.form-note{font-size:.78rem;color:rgba(255,255,255,.5);margin-top:10px}
.form-success{display:none;background:rgba(74,222,128,.15);border:1.5px solid #4ade80;border-radius:var(--radius);padding:24px;text-align:center;color:#fff}
.form-success h3{font-size:1.2rem;font-weight:800;margin-bottom:8px}

/* ABOUT */
#apropos{background:var(--gray)}
.apropos-inner{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;margin-top:48px}
.apropos-text p{color:var(--muted);font-size:.95rem;margin-bottom:16px}
.cert-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.cert-badge{background:#fff;border:2px solid var(--blue-light);border-radius:10px;padding:10px 16px;font-size:.82rem;font-weight:700;color:var(--blue);display:flex;align-items:center;gap:6px}
.apropos-visual{background:var(--blue);border-radius:20px;padding:36px;color:#fff}
.apropos-visual h3{font-size:1.2rem;font-weight:800;margin-bottom:24px;opacity:.8}
.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.stat-box{text-align:center;background:rgba(255,255,255,.08);border-radius:12px;padding:20px}
.stat-box strong{display:block;font-size:2rem;font-weight:900;color:var(--orange)}
.stat-box span{font-size:.82rem;opacity:.7}

/* CONTACT */
#contact{background:#fff}
.contact-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:24px;margin-top:48px}
.contact-card{background:var(--gray);border-radius:var(--radius);padding:28px;text-align:center}
.contact-card-icon{width:52px;height:52px;background:var(--blue-light);border-radius:12px;display:flex;align-items:center;justify-content:center;margin:0 auto 16px}
.contact-card h3{font-size:.95rem;font-weight:800;color:var(--blue);margin-bottom:8px}
.contact-card p,.contact-card a{font-size:.88rem;color:var(--muted);display:block;line-height:1.8}
.contact-card a:hover{color:var(--blue2)}
.horaires{margin-top:32px;background:var(--gray);border-radius:var(--radius);padding:28px}
.horaires h3{font-size:1rem;font-weight:800;color:var(--blue);margin-bottom:16px}
.hor-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.hor-row{display:flex;justify-content:space-between;font-size:.88rem;padding:6px 0;border-bottom:1px solid #e2e8f0}
.hor-row:last-child{border:none}
.hor-row strong{color:var(--text)}
.hor-row span{color:var(--muted)}
.urgence-card{background:linear-gradient(135deg,var(--orange),var(--orange2));border-radius:var(--radius);padding:28px;color:#fff;text-align:center;margin-top:32px}
.urgence-card h3{font-size:1.1rem;font-weight:800;margin-bottom:8px}
.urgence-card p{opacity:.85;font-size:.9rem;margin-bottom:18px}
.urgence-card a{display:inline-flex;align-items:center;gap:8px;background:#fff;color:var(--orange2);padding:12px 24px;border-radius:50px;font-weight:800;font-size:1rem}

/* FOOTER */
footer{background:var(--blue);color:rgba(255,255,255,.7);padding:40px 5% 24px}
.footer-inner{display:grid;grid-template-columns:1.5fr 0.5fr 1fr 1fr;gap:40px;margin-bottom:32px}
.footer-brand .logo{color:#fff;margin-bottom:12px;font-size:1.05rem}
.footer-brand p{font-size:.85rem;line-height:1.7;max-width:280px}
footer h4{color:#fff;font-size:.9rem;font-weight:800;margin-bottom:14px}
footer ul{list-style:none;display:flex;flex-direction:column;gap:8px}
footer ul a{font-size:.85rem;color:rgba(255,255,255,.65);transition:color .2s}
footer ul a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:20px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;font-size:.78rem}
.footer-bottom span{color:rgba(255,255,255,.4)}

/* RESPONSIVE */
@media(max-width:1024px){
  .services-grid{grid-template-columns:repeat(2,1fr)}
  .hero-inner{grid-template-columns:1fr;gap:32px}
  .hero-image{max-width:560px;margin:0 auto;width:100%}
}
@media(max-width:900px){
  .why-grid,.apropos-inner,.zone-inner{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr 1fr}
  .footer-inner{grid-template-columns:1fr 1fr}
  .why-visual{order:-1}
  .hor-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .nav-links,.nav-cta .btn-blue{display:none}
  .burger{display:flex}
  .hero{padding:40px 5%}
  .hero h1{font-size:1.75rem}
  .hero-stats{gap:16px}
  .hero-image img{height:260px}
  .services-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
  .hor-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr 1fr}
  .urgence{font-size:.8rem;gap:8px}
  .back-top{bottom:90px;right:24px}
  .hero-image-badge{padding:9px 12px}
  .zone-list{grid-template-columns:1fr}
  .hero-btns .btn{padding:12px 20px;font-size:.9rem}
  div[style*="grid-template-columns:1fr 1fr"]{display:block!important}
  div[style*="grid-template-columns:1fr 1fr"] > *{margin-top:24px}
}
@media(max-width:400px){
  .hero-stats{flex-direction:column;gap:12px}
}

.brands{
  display:flex;
  justify-content:center;
  gap:40px;
  margin-top:40px;
  opacity:.7;
}
.brands img{
  height:40px;
  filter:grayscale(100%);
}
.service-card:hover{
  transform: translateY(-6px) scale(1.02);

}

.city-hero{
  background:linear-gradient(135deg,#1a3c6e,#2563eb);
  color:#fff;
  padding:80px 5%;
  text-align:center;
}
/* galerie */
/* =========================================
   GALERIE PHOTOS – Expert du Chauffage
   ========================================= */

/* Section conteneur */
#galerie{
  background: var(--gray);
  padding: 80px 2%;
}

#galerie .section-label,
#galerie .section-title,
#galerie .section-sub {
  /* Hérite des styles globaux */
}

/* Grille principale */
.gallery-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 48px;
}

/* Item galerie */
.gallery-item{
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform .3s ease, box-shadow .3s ease;
  background: #e2e8f0;
}

.gallery-item:hover{
  transform: translateY(-6px) scale(1.02);
  box-shadow: 0 12px 40px rgba(0,0,0,.15);
  z-index: 2;
}

.gallery-item img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .4s ease;
}

.gallery-item:hover img{
  transform: scale(1.08);
}

/* Overlay au survol */
.gallery-overlay{
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(26,60,110,.85), transparent 60%);
  display: flex;
  align-items: flex-end;
  padding: 16px;
  opacity: 0;
  transition: opacity .3s ease;
  pointer-events: none;
}

.gallery-item:hover .gallery-overlay{
  opacity: 1;
}

.gallery-overlay span{
  color: #fff;
  font-size: .85rem;
  font-weight: 600;
  text-shadow: 0 2px 4px rgba(0,0,0,.3);
}

/* Badge catégorie */
.gallery-category{
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--orange);
  color: #fff;
  font-size: .7rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: .05em;
  z-index: 1;
}

/* Filtres (optionnel) */
.gallery-filters{
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.filter-btn{
  background: #fff;
  border: 2px solid var(--blue-light);
  color: var(--blue);
  padding: 8px 18px;
  border-radius: 50px;
  font-size: .85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .2s ease;
}

.filter-btn:hover,
.filter-btn.active{
  background: var(--blue2);
  border-color: var(--blue2);
  color: #fff;
}

/* Lightbox / Modal */
.lightbox{
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.92);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s ease;
  padding: 20px;
}

.lightbox.open{
  opacity: 1;
  pointer-events: all;
}

.lightbox-content{
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  animation: zoomIn .3s ease;
}

@keyframes zoomIn{
  from{transform: scale(.95); opacity: 0}
  to{transform: scale(1); opacity: 1}
}

.lightbox-content img{
  max-width: 100%;
  max-height: 85vh;
  border-radius: var(--radius);
  box-shadow: 0 24px 64px rgba(0,0,0,.5);
  object-fit: contain;
}

.lightbox-caption{
  text-align: center;
  color: #fff;
  margin-top: 16px;
  font-size: .95rem;
  font-weight: 500;
}

.lightbox-close{
  position: absolute;
  top: -40px;
  right: 0;
  background: none;
  border: none;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background .2s;
}

.lightbox-close:hover{
  background: rgba(255,255,255,.15);
}

/* Navigation lightbox */
.lightbox-nav{
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255,255,255,.1);
  border: none;
  color: #fff;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .2s;
}

.lightbox-nav:hover{
  background: rgba(255,255,255,.25);
}

.lightbox-prev{ left: 20px; }
.lightbox-next{ right: 20px; }

/* Responsive Galerie */
@media (max-width: 1024px){
  .gallery-grid{
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 900px){
  .gallery-grid{
    grid-template-columns: repeat(2, 1fr);
  }
  .lightbox-nav{
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
  }
}

@media (max-width: 640px){
  .gallery-grid{
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .gallery-filters{
    gap: 8px;
  }
  .filter-btn{
    padding: 6px 14px;
    font-size: .8rem;
  }
  .lightbox-close{
    top: -36px;
    font-size: 1.8rem;
  }
  .lightbox-nav{
    width: 40px;
    height: 40px;
    font-size: 1.1rem;
  }
  .lightbox-prev{ left: 12px; }
  .lightbox-next{ right: 12px; }
}

/* Animation chargement image */
.gallery-item img[loading="lazy"]{
  background: linear-gradient(90deg, #f1f5f9 25%, #e2e8f0 50%, #f1f5f9 75%);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
}

@keyframes loading{
  0%{background-position: 200% 0}
  100%{background-position: -200% 0}
}