:root{
  --nardo:#565a5f;      /* gris type Nardo (Audi), un peu plus foncé */
  --nardo-2:#474b50;    /* variante plus profonde : barre de menu, pied de page */
  --green:#1f6b45;
  --green-2:#2e8a5c;
  --orange:#f08a24;
  --orange-soft:#ffa94d;
  --light:#f4f5f6;
  --text:#2f3338;
  --muted:#656a70;
  --radius:10px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:64px}
body{font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--text);line-height:1.6;background:#fff}
img{max-width:100%;display:block}
a{color:inherit}
.container{width:min(1120px,92%);margin-inline:auto}

/* Bandeau logo */
.brandbar{background:#fff}
.brandbar-inner{display:flex;align-items:center;justify-content:space-between;gap:1.5rem;padding:1rem 0}
.brand{display:block;line-height:0}
.brand img{height:112px;width:auto}
.brandbar-side{display:flex;flex-direction:column;align-items:flex-end;gap:.7rem}
.brandbar-place{font-size:.9rem;color:var(--muted)}

/* Réseaux sociaux */
.social{list-style:none;display:flex;gap:.5rem}
.social a{display:grid;place-items:center;width:40px;height:40px;border-radius:50%;border:1.5px solid #cfd3d7;color:var(--nardo);transition:.2s}
.social a:hover{background:var(--green);border-color:var(--green);color:#fff;transform:translateY(-2px)}
.social svg{width:20px;height:20px;fill:currentColor}
.social svg.line{fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.social-light a{border-color:rgba(255,255,255,.45);color:#fff}
.social-light a:hover{background:var(--orange);border-color:var(--orange);color:#1b1b1b}

/* Barre de menu (collée en haut au défilement) */
.navbar{position:sticky;top:0;z-index:50;background:var(--nardo-2);border-bottom:3px solid var(--green)}
.nav{display:flex;align-items:center;min-height:54px}
.menu{display:flex;align-items:center;gap:1.8rem;width:100%}
.menu a{color:#fff;text-decoration:none;font-size:.95rem;font-weight:500}
.menu a:not(.btn):hover{color:var(--orange-soft)}
.menu .btn-small{margin-left:auto}
.burger{display:none;align-items:center;gap:.7rem;background:none;border:0;color:#fff;font:inherit;font-weight:600;padding:.8rem 0;cursor:pointer}
.bars{display:grid;gap:5px}
.bars i{display:block;width:22px;height:2px;background:#fff;border-radius:2px}

/* Boutons */
.btn{display:inline-block;background:var(--orange);color:#1b1b1b;font-weight:700;padding:.85rem 1.5rem;border-radius:var(--radius);border:0;text-decoration:none;cursor:pointer;font-size:1rem;transition:transform .15s,background .15s}
.btn:hover{background:#ff9a38;transform:translateY(-2px)}
.btn-small{padding:.5rem 1rem;font-size:.9rem;color:#1b1b1b!important}
.btn-ghost{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.6)}
.btn-ghost:hover{background:rgba(255,255,255,.12)}

/* Accueil */
.hero{display:flex;align-items:center;min-height:78vh;color:#fff;padding:90px 0 80px;
  background:
    radial-gradient(circle at 85% 20%,rgba(46,138,92,.38),transparent 45%),
    radial-gradient(circle at 10% 90%,rgba(240,138,36,.2),transparent 40%),
    linear-gradient(135deg,var(--nardo-2),#62666c);
  position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;opacity:.08;
  background-image:radial-gradient(#fff 1px,transparent 1.5px);background-size:14px 14px;pointer-events:none}
.hero-inner{position:relative;z-index:1}
.eyebrow{color:var(--orange-soft);text-transform:uppercase;letter-spacing:3px;font-size:.95rem;font-weight:700;margin-bottom:1rem}
.hero h1{font-size:clamp(2rem,5vw,3.6rem);line-height:1.15;margin-bottom:1.2rem;font-weight:800}
.lead{max-width:660px;color:#eceef0;font-size:1.1rem;margin-bottom:2rem}
.hero-actions{display:flex;gap:1rem;flex-wrap:wrap}
.hero-stats{list-style:none;display:flex;gap:2.5rem;flex-wrap:wrap;margin-top:3rem;color:#e3e5e8;font-size:.9rem}
.hero-stats strong{display:block;color:#fff;font-size:1.3rem;line-height:1.3}

/* Sections */
.section{padding:90px 0}
.section-dark{background:var(--nardo);color:#fff}
.section-title{font-size:clamp(1.7rem,3vw,2.4rem);margin-bottom:.6rem;position:relative;padding-bottom:.8rem}
.section-title::after{content:"";position:absolute;left:0;bottom:0;width:60px;height:4px;background:linear-gradient(90deg,var(--green),var(--orange));border-radius:2px}
.section-intro{color:var(--muted);margin-bottom:2.5rem}
.section-dark .section-intro{color:#e6e8ea}

/* Cartes services */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem}
.card{background:var(--light);border-radius:var(--radius);padding:2rem;border-top:4px solid var(--green);transition:transform .25s,box-shadow .25s}
.card:nth-child(2){border-top-color:var(--orange)}
.card:hover{transform:translateY(-6px);box-shadow:0 14px 30px rgba(0,0,0,.12)}
.card-icon{font-size:2rem;font-weight:800;color:var(--green);opacity:.4;margin-bottom:.5rem}
.card h3{margin-bottom:.6rem;font-size:1.3rem}
.card p{color:var(--muted);margin-bottom:1rem}
.card ul{list-style:none}
.card li{padding-left:1.3rem;position:relative;font-size:.95rem;margin:.3rem 0}
.card li::before{content:"";position:absolute;left:0;top:.6em;width:8px;height:8px;background:var(--orange);transform:rotate(45deg)}

/* Avant / après */
.compare{position:relative;width:100%;max-width:520px;aspect-ratio:3/4;margin:0 auto 1rem;border-radius:var(--radius);overflow:hidden;user-select:none;box-shadow:0 12px 34px rgba(0,0,0,.35)}
.compare-after,.compare-before{position:absolute;inset:0}
.compare-after{background:url(img/radiateur-thermolaquage-ral9016.jpg) center bottom/cover}
.compare-before{background:url(img/radiateur-sablage.jpg) center bottom/cover;clip-path:inset(0 50% 0 0)}
.tag{position:absolute;z-index:2;pointer-events:none;bottom:14px;left:14px;background:rgba(0,0,0,.6);color:#fff;font-size:.8rem;padding:.25rem .7rem;border-radius:20px;text-transform:uppercase;letter-spacing:1px}
.tag-right{left:auto;right:14px}
.compare-handle{position:absolute;top:0;bottom:0;left:50%;width:3px;background:#fff;transform:translateX(-50%);pointer-events:none}
.compare-handle span{position:absolute;top:50%;left:50%;width:42px;height:42px;border-radius:50%;background:var(--orange);transform:translate(-50%,-50%);box-shadow:0 2px 10px rgba(0,0,0,.4)}
.compare-handle span::before{content:"◀ ▶";position:absolute;inset:0;display:grid;place-items:center;font-size:.6rem;color:#1b1b1b;letter-spacing:2px}
.compare input[type=range]{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:ew-resize;margin:0}
.hint{text-align:center;color:#dfe2e5;font-size:.85rem;margin-bottom:2.5rem}
.hint code{background:rgba(255,255,255,.14);padding:.1rem .4rem;border-radius:4px}

/* Galerie */
.filters{display:flex;gap:.6rem;flex-wrap:wrap;justify-content:center;margin-bottom:2rem}
.filter{background:transparent;border:2px solid rgba(255,255,255,.35);color:#fff;padding:.45rem 1.1rem;border-radius:30px;cursor:pointer;font-size:.9rem;transition:.2s}
.filter:hover{border-color:var(--orange)}
.filter.active{background:var(--orange);border-color:var(--orange);color:#1b1b1b;font-weight:700}
.gallery{column-width:280px;column-gap:1.2rem}
.shot{break-inside:avoid;margin:0 0 1.2rem;background:var(--nardo-2);border-radius:var(--radius);overflow:hidden;transition:transform .25s,opacity .25s}
.shot:hover{transform:translateY(-4px)}
.shot img{width:100%;height:auto;display:block;cursor:zoom-in}
.shot figcaption{padding:.9rem 1rem;font-size:.9rem;color:#eceef0}

.gallery[hidden],.filters[hidden]{display:none}

/* Photo agrandie */
.lightbox{border:0;background:transparent;padding:0;max-width:100vw;max-height:100vh;width:100vw;height:100vh;color:#fff;overflow:hidden}
.lightbox::backdrop{background:rgba(20,22,25,.92)}
.lightbox[open]{display:grid;place-items:center;grid-template-columns:auto 1fr auto;gap:.5rem;padding:1rem}
.lightbox figure{grid-column:2;display:grid;gap:.7rem;justify-items:center;max-height:94vh;min-width:0}
.lightbox img{max-width:100%;max-height:82vh;width:auto;height:auto;border-radius:8px;object-fit:contain}
.lightbox figcaption{font-size:.95rem;text-align:center;color:#eceef0}
.lb-close,.lb-nav{background:rgba(255,255,255,.14);border:0;color:#fff;cursor:pointer;border-radius:50%;width:46px;height:46px;font-size:1.8rem;line-height:1;display:grid;place-items:center}
.lb-close:hover,.lb-nav:hover{background:var(--orange);color:#1b1b1b}
.lb-close{position:absolute;top:14px;right:14px;z-index:2}
.lb-prev{grid-column:1}.lb-next{grid-column:3}
.lb-nav[hidden]{display:none}
@media (max-width:640px){.lightbox[open]{grid-template-columns:1fr;grid-template-rows:1fr auto;padding:.5rem}.lightbox figure{grid-column:1}.lb-nav{position:absolute;bottom:18px;width:44px;height:44px}.lb-prev{left:14px}.lb-next{right:14px}}

/* Méthode */
.steps{list-style:none;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1.5rem;margin-top:2.5rem}
.steps li{position:relative;padding:1.5rem;border-left:3px solid var(--green)}
.step-icon{position:relative;width:64px;height:64px;border-radius:16px;background:linear-gradient(135deg,var(--green),var(--green-2));display:grid;place-items:center;margin-bottom:1rem;color:#fff;box-shadow:0 6px 16px rgba(31,107,69,.3)}
.step-icon svg{width:32px;height:32px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.step-num{position:absolute;top:-8px;right:-8px;width:26px;height:26px;border-radius:50%;background:var(--orange);color:#1b1b1b;font-weight:800;font-size:.8rem;display:grid;place-items:center}
.steps h3{margin-bottom:.3rem}
.steps p{color:var(--muted);font-size:.95rem}

/* Contact */
.section-contact{background:var(--light)}
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:3rem;align-items:start}
.contact-grid p{color:var(--muted);margin-bottom:1.5rem}
.coords{list-style:none}
.coords li{padding:.5rem 0;border-bottom:1px solid #dcdfe2}
.coords strong{display:inline-block;min-width:100px;color:var(--green)}
.contact-grid .follow{margin:1.5rem 0 .7rem;font-weight:600;color:var(--text)}
.form{background:#fff;padding:2rem;border-radius:var(--radius);box-shadow:0 8px 28px rgba(0,0,0,.08);display:grid;gap:1rem}
.row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.form label{display:grid;gap:.3rem;font-size:.9rem;font-weight:600}
.form input,.form select,.form textarea{font:inherit;padding:.7rem .8rem;border:1.5px solid #cfd3d7;border-radius:8px;background:#fff}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--green);box-shadow:0 0 0 3px rgba(31,107,69,.15)}
.form .check{display:flex;gap:.6rem;align-items:flex-start;font-weight:400;font-size:.85rem}
.form .check input{margin-top:.25rem}
.hp{position:absolute;left:-9999px;height:0;overflow:hidden}
.form-status{min-height:1.4em;font-weight:600;margin:0!important}
.form-status.ok{color:var(--green)}
.form-status.err{color:#c0392b}
.form .invalid{border-color:#c0392b}

/* Envoi de photos */
.field{display:grid;gap:.5rem}
.field-label{font-size:.9rem;font-weight:600}
.form .dropzone{position:relative;display:flex;align-items:center;gap:.8rem;padding:1rem;border:2px dashed #b9bec4;border-radius:8px;background:var(--light);cursor:pointer;font-weight:600;color:var(--nardo);transition:.2s}
.form .dropzone:hover,.form .dropzone:focus-within{border-color:var(--green);background:#eef6f1}
.dropzone svg{width:28px;height:28px;flex:none;fill:none;stroke:var(--green);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.form .dropzone input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer;padding:0;border:0}
.photo-list{list-style:none;display:grid;gap:.5rem}
.photo-list:empty{display:none}
.photo-list li{display:flex;align-items:center;gap:.7rem;padding:.4rem .5rem;background:var(--light);border-radius:8px;font-size:.85rem}
.photo-list .thumb{width:44px;height:44px;border-radius:6px;object-fit:cover;background:#dfe2e5;flex:none;display:grid;place-items:center;font-size:.7rem;font-weight:700;color:var(--muted)}
.photo-list .name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.photo-list button{border:0;background:none;font-size:1.3rem;line-height:1;cursor:pointer;color:var(--muted);padding:.2rem .5rem}
.photo-list button:hover{color:#c0392b}
.form small{font-weight:400;color:var(--muted);font-size:.8rem}

/* Localisation */
.acces-grid{display:grid;grid-template-columns:1fr 1.4fr;gap:3rem;align-items:center}
address{font-style:normal;font-size:1.15rem;line-height:1.7;margin-top:1rem}
.acces-text{color:var(--muted);margin:1.5rem 0 1rem}
.route-buttons{display:flex;flex-wrap:wrap;gap:.7rem}
.btn-route{display:inline-flex;align-items:center;gap:.5rem;background:var(--nardo);color:#fff}
.btn-route:hover{background:var(--green)}
.btn-route svg{width:18px;height:18px;fill:currentColor}
.map{position:relative;min-height:360px;border-radius:var(--radius);overflow:hidden;background:linear-gradient(135deg,#e9ecee,#d9dde0);box-shadow:0 8px 28px rgba(0,0,0,.1)}
.map iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.map-load{position:absolute;inset:0;width:100%;border:0;background:none;cursor:pointer;display:grid;place-content:center;justify-items:center;gap:.4rem;font:inherit;font-weight:700;color:var(--nardo)}
.map-load svg{width:44px;height:44px;fill:var(--orange)}
.map-load small{font-weight:400;font-size:.8rem;color:var(--muted)}
.map noscript a{position:absolute;inset:0;display:grid;place-items:center;font-weight:700}

/* Pied de page */
.site-footer{background:var(--nardo-2);color:#e3e5e8;padding:1.8rem 0;font-size:.9rem}
.foot{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}
.foot a{text-decoration:none}
.foot p a:hover{color:var(--orange-soft)}

/* Apparition au défilement */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}

/* Mobile */
@media (max-width:820px){
  .brand img{height:76px}
  .brandbar-side{display:none}
  .burger{display:flex}
  .menu{display:none;position:absolute;top:100%;left:0;right:0;width:auto;background:var(--nardo-2);flex-direction:column;align-items:stretch;gap:0;padding:.5rem 4% 1rem;border-bottom:3px solid var(--green)}
  .menu.open{display:flex}
  .menu a{padding:.8rem 0}
  .menu .btn-small{margin:.6rem 0 0;text-align:center}
  .contact-grid,.acces-grid{grid-template-columns:1fr}
  .row{grid-template-columns:1fr}
  .section{padding:64px 0}
  .hero{padding:64px 0 56px}
  .map{min-height:300px}
}

/* FAQ */
.section-soft{background:var(--light)}
.faq{max-width:860px;display:grid;gap:1.3rem;counter-reset:faq}
.faq-item{background:#fff;border:1px solid #d5d8dc;border-radius:12px;overflow:hidden;box-shadow:0 3px 10px rgba(0,0,0,.06);transition:box-shadow .2s,border-color .2s}
.faq-item:hover{box-shadow:0 8px 22px rgba(0,0,0,.1)}
.faq-item[open]{border-color:var(--green);box-shadow:0 8px 22px rgba(0,0,0,.1)}
.faq-item summary{cursor:pointer;list-style:none;display:flex;align-items:center;gap:1rem;padding:1.15rem 1.3rem;font-weight:700;font-size:1.05rem;background:#fafbfb;counter-increment:faq;position:relative}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{content:counter(faq);flex:none;width:2.2rem;height:2.2rem;border-radius:50%;display:grid;place-items:center;font-size:.95rem;color:#fff;background:var(--green)}
.faq-item:nth-child(even) summary::before{background:var(--orange)}
.faq-item summary::after{content:"+";margin-left:auto;flex:none;width:2rem;height:2rem;display:grid;place-items:center;font-size:1.4rem;line-height:1;color:var(--green);border:2px solid currentColor;border-radius:50%;transition:transform .2s,background .2s,color .2s}
.faq-item[open] summary{background:#fff;border-bottom:1px solid #e3e5e8}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item summary:focus-visible{outline:3px solid var(--orange);outline-offset:-3px}
.faq-item p{margin:0;padding:1.4rem 1.5rem 1.6rem 4.6rem;color:var(--text);line-height:1.75}
@media (max-width:600px){.faq-item summary{padding:1rem;gap:.8rem;font-size:1rem}.faq-item p{padding:1.2rem 1.1rem 1.4rem}}
.faq-cta{max-width:820px;margin-top:2.5rem;display:flex;align-items:center;gap:1.2rem;flex-wrap:wrap}
.faq-cta p{font-weight:700;margin:0}