/* Chaufagiste.be — CSS optimisé 2026 — remplace Tailwind CDN */
:root {
  --rouge:      #e11d48;
  --rouge-f:    #be123c;
  --rouge-pale: #fff1f4;
  --ardoise:    #0f172a;
  --ardoise2:   #1e293b;
  --ardoise3:   #334155;
  --blanc:      #ffffff;
  --gris:       #f8fafc;
  --gris2:      #f1f5f9;
  --gris3:      #e2e8f0;
  --texte:      #1e293b;
  --texte2:     #475569;
  --texte3:     #94a3b8;
  --vert:       #16a34a;
  --bleu:       #0284c7;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:'Segoe UI',system-ui,-apple-system,sans-serif;background:var(--gris);color:var(--texte);line-height:1.6}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}

/* CONTAINER */
.container{max-width:1100px;margin:0 auto;padding:0 20px}

/* HEADER */
header{background:rgba(255,255,255,.92);backdrop-filter:blur(8px);position:sticky;top:0;z-index:100;border-bottom:1px solid var(--gris3);box-shadow:0 1px 3px rgba(0,0,0,.06)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;max-width:1100px;margin:0 auto}
.logo{display:flex;align-items:center;gap:10px;font-size:1.2rem;font-weight:700}
.logo span{color:var(--rouge)}
.logo img{height:32px;width:32px}
.nav-links{display:flex;align-items:center;gap:24px;font-size:.9rem}
.nav-links a{color:var(--texte2);transition:color .15s;font-weight:500}
.nav-links a:hover{color:var(--rouge)}
.btn-tel{background:var(--rouge);color:#fff!important;padding:9px 18px;border-radius:10px;font-weight:700;display:flex;align-items:center;gap:6px;font-size:.88rem;transition:background .15s}
.btn-tel:hover{background:var(--rouge-f)!important}
.menu-btn{display:none;background:none;border:1px solid var(--gris3);border-radius:8px;padding:8px 10px;cursor:pointer;font-size:1.1rem}
.mobile-nav{display:none;border-top:1px solid var(--gris3);background:#fff}
.mobile-nav.open{display:block}
.mobile-nav a{display:block;padding:12px 20px;font-size:.95rem;border-bottom:1px solid var(--gris3);color:var(--texte2)}

/* HERO */
.hero{background:linear-gradient(135deg,var(--ardoise) 0%,#1a0a14 50%,var(--ardoise) 100%);color:#fff;padding:64px 20px;border-bottom:4px solid var(--rouge);overflow:hidden;position:relative}
.hero::before{content:'';position:absolute;top:-80px;right:-80px;width:500px;height:500px;background:rgba(225,29,72,.06);border-radius:50%}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center;max-width:1100px;margin:0 auto}
.hero-badge{display:inline-block;background:rgba(225,29,72,.15);border:1px solid rgba(225,29,72,.3);color:#fda4af;font-size:.75rem;padding:4px 12px;border-radius:20px;margin-bottom:14px;font-weight:600}
.hero h1{font-size:clamp(1.8rem,4vw,2.8rem);font-weight:800;line-height:1.1;margin-bottom:14px}
.hero-sub{color:rgba(255,255,255,.75);font-size:1rem;margin-bottom:24px;line-height:1.7}
.hero-btns{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:18px}
.btn-rouge{background:var(--rouge);color:#fff;padding:12px 24px;border-radius:10px;font-weight:700;font-size:.92rem;display:inline-flex;align-items:center;gap:6px;transition:all .2s;border:none;cursor:pointer}
.btn-rouge:hover{background:var(--rouge-f);color:#fff}
.btn-outline{background:transparent;color:#fff;padding:12px 22px;border-radius:10px;font-weight:600;font-size:.92rem;border:2px solid rgba(255,255,255,.25);display:inline-flex;align-items:center;gap:6px;transition:all .2s}
.btn-outline:hover{border-color:#fff;color:#fff}
.hero-garanties{display:flex;gap:16px;flex-wrap:wrap}
.hero-garanties span{font-size:.8rem;color:rgba(255,255,255,.6)}
.hero-garanties span::before{content:'✓ ';color:var(--vert)}
.hero-img{border-radius:20px;box-shadow:0 20px 60px rgba(0,0,0,.3)}
.hero-search{display:flex;gap:8px;margin-bottom:14px}
.hero-search input{flex:1;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);border-radius:10px;padding:11px 16px;color:#fff;font-size:.9rem;font-family:inherit}
.hero-search input::placeholder{color:rgba(255,255,255,.5)}
.hero-search input:focus{outline:none;border-color:rgba(255,255,255,.5);background:rgba(255,255,255,.15)}
.hero-search button{background:var(--ardoise2);color:#fff;border:none;border-radius:10px;padding:11px 18px;font-weight:600;cursor:pointer;font-size:.9rem;transition:background .15s;font-family:inherit}
.hero-search button:hover{background:var(--ardoise3)}
.hero-search-hint{font-size:.75rem;color:rgba(255,255,255,.5)}

/* URGENCE BAR */
.urgence-bar{background:var(--rouge);color:#fff;text-align:center;padding:9px 16px;font-size:.82rem;font-weight:600}
.urgence-bar a{color:#fff;text-decoration:underline}

/* SECTIONS */
.section{padding:60px 20px}
.section-white{background:#fff}
.section-gray{background:var(--gris2)}
.section-dark{background:var(--ardoise);color:#fff}
.section-title{font-size:1.7rem;font-weight:800;margin-bottom:6px}
.section-title-w{font-size:1.7rem;font-weight:800;margin-bottom:6px;color:#fff}
.section-sub{color:var(--texte2);font-size:.92rem;margin-bottom:32px}
.section-sub-w{color:rgba(255,255,255,.65);font-size:.92rem;margin-bottom:32px}
.text-center{text-align:center}

/* GRIDS */
.grid-2{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}
.grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.grid-4{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px}

/* CARDS */
.card{background:#fff;border:1px solid var(--gris3);border-radius:14px;padding:22px;transition:all .2s}
.card:hover{border-color:var(--rouge);box-shadow:0 6px 24px rgba(225,29,72,.1);transform:translateY(-2px)}
.card-dark{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:14px;padding:22px}
.card-icon{font-size:2rem;margin-bottom:10px}
.card h3{font-size:.95rem;font-weight:700;margin-bottom:6px}
.card-dark h3{color:#fff}
.card p,.card-dark p{font-size:.84rem;color:var(--texte2)}
.card-dark p{color:rgba(255,255,255,.6)}
.card-link{display:block}
.card-link:hover .card{border-color:var(--rouge);box-shadow:0 6px 24px rgba(225,29,72,.1);transform:translateY(-2px)}

/* SERVICES GRID */
.service-card{background:#fff;border:1px solid var(--gris3);border-radius:12px;padding:18px;display:block;transition:all .2s}
.service-card:hover{border-color:var(--rouge);box-shadow:0 4px 16px rgba(225,29,72,.08)}
.service-name{font-size:.92rem;font-weight:600;color:var(--texte);margin-bottom:4px}
.service-short{font-size:.8rem;color:var(--texte2)}

/* VILLES */
.ville-pill{background:#fff;border:1px solid var(--gris3);border-radius:8px;padding:8px 14px;font-size:.84rem;font-weight:500;transition:all .15s;display:block;color:var(--texte)}
.ville-pill:hover{border-color:var(--rouge);color:var(--rouge);background:var(--rouge-pale)}
.villes-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:8px}

/* FAQ */
.faq-wrap{max-width:800px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--gris3);padding:16px 0}
.faq-item:last-child{border-bottom:none}
details summary{font-size:.95rem;font-weight:700;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;color:var(--texte)}
details summary::-webkit-details-marker{display:none}
details summary::after{content:'+';color:var(--rouge);font-size:1.3rem;font-weight:300;transition:transform .2s}
details[open] summary::after{transform:rotate(45deg)}
details p{font-size:.88rem;color:var(--texte2);line-height:1.75;margin-top:10px;padding-right:20px}

/* TEMOIGNAGES */
.temoignage{background:#fff;border:1px solid var(--gris3);border-left:4px solid var(--rouge);border-radius:0 12px 12px 0;padding:20px}
.stars{color:var(--rouge);margin-bottom:6px;letter-spacing:2px}
.temoignage blockquote{font-size:.86rem;font-style:italic;color:var(--texte);margin-bottom:10px;line-height:1.7}
.temoignage cite{font-size:.8rem;font-weight:700;color:var(--texte2);font-style:normal}

/* PROCESS */
.process-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px}
.step{text-align:center}
.step-num{width:50px;height:50px;background:var(--rouge);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.1rem;margin:0 auto 12px}
.step h4{font-size:.92rem;font-weight:700;margin-bottom:6px;color:#fff}
.step p{font-size:.82rem;color:rgba(255,255,255,.6)}

/* FORMULAIRE */
.devis-card{background:#fff;border:2px solid var(--rouge);border-radius:16px;padding:32px;box-shadow:0 8px 32px rgba(225,29,72,.08)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form-group{margin-bottom:14px}
.form-group label{display:block;font-size:.8rem;font-weight:700;color:var(--texte);margin-bottom:5px;text-transform:uppercase;letter-spacing:.04em}
.form-group input,.form-group select,.form-group textarea{width:100%;border:1px solid var(--gris3);border-radius:8px;padding:10px 14px;font-size:.9rem;color:var(--texte);font-family:inherit;transition:border-color .2s;background:#fff}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--rouge);box-shadow:0 0 0 3px rgba(225,29,72,.1)}
.btn-submit{background:var(--rouge);color:#fff;border:none;border-radius:10px;padding:13px;font-size:.95rem;font-weight:700;width:100%;cursor:pointer;font-family:inherit;transition:background .2s}
.btn-submit:hover{background:var(--rouge-f)}

/* ALERTS */
.alert-ok{background:#f0fdf4;border:1px solid #86efac;border-radius:10px;padding:14px;color:var(--vert);margin-bottom:16px;font-size:.9rem}
.alert-err{background:#fff1f4;border:1px solid #fda4af;border-radius:10px;padding:14px;color:var(--rouge-f);margin-bottom:16px;font-size:.9rem}

/* CTA BOX */
.cta-box{background:var(--rouge);border-radius:16px;padding:48px 24px;text-align:center}
.cta-box h2{color:#fff;font-size:1.7rem;font-weight:800;margin-bottom:10px}
.cta-box p{color:rgba(255,255,255,.8);margin-bottom:24px}

/* WHATSAPP */
.whatsapp-btn{position:fixed;bottom:80px;right:20px;z-index:999;background:#25d366;color:#fff;border-radius:50%;width:56px;height:56px;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 20px rgba(37,211,102,.4);transition:all .2s}
.whatsapp-btn:hover{transform:scale(1.1);background:#1da851}
.whatsapp-btn svg{width:28px;height:28px;fill:#fff}

/* STICKY TEL MOBILE */
.sticky-tel{position:fixed;bottom:0;left:0;right:0;z-index:90;background:var(--rouge);display:none;padding:12px 20px;text-align:center}
.sticky-tel a{color:#fff;font-weight:700;font-size:.95rem;display:flex;align-items:center;justify-content:center;gap:8px}

/* FOOTER */
footer{background:var(--ardoise);color:#fff;padding:50px 20px 20px;border-top:3px solid var(--rouge)}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:28px;margin-bottom:28px}
.footer-brand{font-size:1.15rem;font-weight:800;margin-bottom:10px}
.footer-brand span{color:var(--rouge)}
.footer-text{font-size:.83rem;color:#64748b;line-height:1.6}
.footer-title{font-size:.75rem;font-weight:700;color:#94a3b8;text-transform:uppercase;letter-spacing:.06em;margin-bottom:12px}
.footer-links{list-style:none}
.footer-links li{margin-bottom:7px}
.footer-links a{font-size:.83rem;color:#64748b;transition:color .15s}
.footer-links a:hover{color:#fff}
.footer-bottom{border-top:1px solid #1e293b;padding-top:16px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;font-size:.78rem;color:#475569}

/* SCHEMA BADGE */
.schema-info{background:var(--gris2);border:1px solid var(--gris3);border-radius:10px;padding:16px;font-size:.82rem;color:var(--texte2);margin-top:16px}

/* RESPONSIVE */
@media(max-width:768px){
  .hero-grid{grid-template-columns:1fr}
  .hero-img{display:none}
  .hero{padding:44px 16px}
  .hero h1{font-size:1.8rem}
  .nav-links{display:none}
  .menu-btn{display:block}
  .section{padding:40px 16px}
  .form-row{grid-template-columns:1fr}
  .sticky-tel{display:block}
  .devis-card{padding:20px}
  .whatsapp-btn{bottom:70px}
}