/* ============================================================
   ThermoFlow — feuille de style partagée (multipage)
   Plombier-chauffagiste · Riom (63) · navy / bleu
   ============================================================ */
:root{
  --navy:#0f172a;--navy-2:#1e293b;--ink:#1e293b;
  --blue:#6366f1;--blue-d:#4f46e5;--cyan:#818cf8;
  --paper:#f8fafc;--mist:#eef2f9;--mist-2:#e0e7ff;
  --text:#1e293b;--soft:#64748b;--line:#e2e8f0;
  --gold:#f5a623;
  --head:'Inter',system-ui,sans-serif;--sans:'Inter',system-ui,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--paper);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:clip}
h1,h2,h3,h4{font-family:var(--head);font-weight:700;line-height:1.14;color:var(--ink)}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.btn{display:inline-flex;align-items:center;gap:9px;font-family:var(--sans);font-weight:600;font-size:15px;padding:14px 26px;border-radius:11px;transition:.25s;cursor:pointer;border:1px solid transparent}
.btn svg{flex:0 0 auto}
.btn-blue{background:var(--blue);color:#fff;box-shadow:0 14px 30px -12px rgba(99,102,241,.6)}
.btn-blue:hover{background:var(--blue-d);transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.35)}
.btn-ghost:hover{background:rgba(255,255,255,.16)}
.btn-out{background:#fff;color:var(--blue-d);border-color:var(--line)}
.btn-out:hover{border-color:var(--blue);background:var(--mist)}
.eyebrow{font-family:var(--sans);font-weight:700;font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--blue)}
.tag{display:inline-flex;align-items:center;gap:7px;font-size:13px;font-weight:600;color:#dfeaff;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);padding:7px 13px;border-radius:50px}

/* NAV */
header.nav{position:fixed;top:0;left:0;right:0;z-index:80;transition:.35s;padding:18px 0}
header.nav.solid{background:rgba(15,23,42,.92);backdrop-filter:blur(12px);padding:11px 0;box-shadow:0 8px 30px -16px rgba(0,0,0,.6)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--head);font-weight:800;font-size:20px;letter-spacing:.02em;color:#fff}
.brand .dot{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--blue),var(--cyan));display:grid;place-items:center;box-shadow:0 6px 16px -6px rgba(99,102,241,.7)}
.brand b{font-weight:800}.brand span{color:var(--cyan)}
.nav-links{display:flex;gap:30px;align-items:center}
.nav-links a{font-size:14.5px;font-weight:600;color:#e8eefb;opacity:.9;transition:.2s}
.nav-links a:hover,.nav-links a.active{opacity:1;color:var(--cyan)}
.nav-cta{display:flex;align-items:center;gap:12px}
.nav-tel{display:flex;align-items:center;gap:8px;color:#fff;font-weight:700;font-family:var(--head);font-size:15px}
.burger{display:none;background:none;border:0;cursor:pointer;color:#fff}

/* MOBILE MENU */
.mmenu{position:fixed;inset:0;z-index:90;background:var(--navy);display:none;flex-direction:column;justify-content:center;align-items:center;gap:6px}
.mmenu.open{display:flex}
.mmenu a{font-family:var(--head);font-weight:700;font-size:24px;color:#fff;padding:12px}
.mmenu .btn{margin-top:16px}
.mmenu .close{position:absolute;top:22px;right:24px;background:none;border:0;color:#fff;font-size:32px;cursor:pointer}

/* HERO (accueil) — split */
.hero2{position:relative;background:var(--navy);overflow:hidden}
.hero2::before{content:"";position:absolute;inset:0;background:radial-gradient(900px 500px at 88% -5%,rgba(129,140,248,.22),transparent 60%),radial-gradient(700px 500px at 0% 100%,rgba(99,102,241,.18),transparent 55%)}
.hero2 .wrap{position:relative;z-index:1;display:grid;grid-template-columns:1.08fr .92fr;gap:54px;align-items:center;padding:140px 24px 90px}
.hero2 .eyebrow{color:var(--cyan)}
.hero2 h1{color:#fff;font-size:clamp(36px,5.4vw,62px);font-weight:800;letter-spacing:-.5px;margin:16px 0 18px}
.hero2 h1 .hl{background:linear-gradient(120deg,var(--cyan),var(--blue));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero2 p.sub{color:#cdd9ec;font-size:18.5px;max-width:560px;margin-bottom:26px}
.hero2 .cta-row{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:26px}
.hero2 .chips{display:flex;gap:10px;flex-wrap:wrap}
.hpanel{background:linear-gradient(160deg,rgba(255,255,255,.09),rgba(255,255,255,.03));border:1px solid rgba(255,255,255,.16);border-radius:22px;padding:30px;backdrop-filter:blur(8px);box-shadow:0 40px 80px -40px rgba(0,0,0,.6)}
.hpanel h3{color:#fff;font-size:18px;margin-bottom:18px}
.hrow{display:flex;align-items:center;gap:14px;padding:14px 0;border-bottom:1px solid rgba(255,255,255,.1)}
.hrow:last-of-type{border-bottom:0}
.hrow .hi{width:44px;height:44px;border-radius:12px;background:rgba(99,102,241,.18);display:grid;place-items:center;color:var(--cyan);flex:0 0 auto}
.hrow b{display:block;color:#fff;font-family:var(--head);font-size:15px}
.hrow span{color:#aebfd6;font-size:13.5px}
.hpanel .btn{width:100%;justify-content:center;margin-top:18px}

/* STATS bar */
.stats{background:var(--navy-2);color:#fff}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:26px 24px}
.stat{text-align:center}
.stat b{font-family:var(--head);font-weight:800;font-size:26px;display:block;color:#fff}
.stat span{font-size:13px;color:#aebfd6}

/* SECTION base */
section.block{padding:92px 0;position:relative}
.mist{background:var(--mist)}
.head-c{max-width:680px;margin:0 auto;text-align:center}
.head-c h2{font-size:clamp(28px,4vw,44px);margin:14px 0 14px}
.head-c p{color:var(--soft);font-size:17px}

/* SERVICES */
.svc{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:54px}
.card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:34px 30px;transition:.3s}
.card:hover{transform:translateY(-6px);box-shadow:0 30px 60px -34px rgba(15,23,42,.4);border-color:#c5d8f0}
.card .ico{width:56px;height:56px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;margin-bottom:20px;box-shadow:0 12px 24px -12px rgba(99,102,241,.7)}
.card h3{font-size:21px;margin-bottom:10px}
.card p{color:var(--soft);font-size:15px;margin-bottom:14px}
.card ul{list-style:none}
.card li{font-size:14.5px;color:var(--text);padding-left:24px;position:relative;margin-bottom:8px}
.card li::before{content:"";position:absolute;left:0;top:8px;width:14px;height:14px;border-radius:50%;background:var(--mist-2);box-shadow:inset 0 0 0 4px var(--blue)}

/* WHY */
.why{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:54px}
.why .w{text-align:center;padding:28px 18px;border-radius:16px;background:#fff;border:1px solid var(--line)}
.why .w .ic{margin-bottom:12px;display:flex;justify-content:center}
.why .w h3{font-size:16px;margin-bottom:6px}
.why .w p{font-size:13.5px;color:var(--soft)}

/* PROCESS */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:54px;counter-reset:s}
.step{position:relative;padding:30px 24px;background:#fff;border:1px solid var(--line);border-radius:16px}
.step::before{counter-increment:s;content:"0" counter(s);font-family:var(--head);font-weight:800;font-size:34px;display:block;margin-bottom:10px;-webkit-text-stroke:1px var(--blue);color:transparent}
.step h3{font-size:17px;margin-bottom:8px}
.step p{font-size:14px;color:var(--soft)}

/* ABOUT */
.about{display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:center}
.about.rev .media{order:2}
.about .media{position:relative;border-radius:20px;overflow:hidden;aspect-ratio:4/3;background:linear-gradient(135deg,var(--navy-2),var(--navy));box-shadow:0 34px 70px -34px rgba(15,23,42,.5)}
.about .media img{width:100%;height:100%;object-fit:cover}
.about h2{font-size:clamp(26px,3.4vw,40px);margin:14px 0 18px}
.about p{color:var(--soft);margin-bottom:14px}
.sign{font-family:var(--head);font-weight:700;color:var(--ink);margin-top:20px}
.sign span{font-family:var(--sans);font-weight:500;font-size:13px;color:var(--soft)}
.about .pts{display:flex;gap:26px;flex-wrap:wrap;margin-top:22px}
.about .pts .p b{font-family:var(--head);font-size:22px;color:var(--blue-d);display:block}
.about .pts .p span{font-size:13px;color:var(--soft)}

/* ZONE */
.zchips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;max-width:780px;margin:42px auto 0}
.zchips span{background:#fff;border:1px solid var(--line);color:var(--text);font-weight:600;font-size:14px;padding:9px 16px;border-radius:50px}

/* AVIS */
.reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:54px}
.rev{background:#fff;border:1px solid var(--line);border-radius:18px;padding:30px 28px;box-shadow:0 22px 50px -36px rgba(15,23,42,.35)}
.rev .stars{color:var(--gold);letter-spacing:3px;font-size:16px;margin-bottom:14px}
.rev p{font-size:15.5px;color:var(--text);line-height:1.6;margin-bottom:18px}
.rev .who{display:flex;align-items:center;gap:12px}
.rev .av{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;flex:0 0 auto;background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;font-weight:700;font-family:var(--head)}
.rev .who b{font-family:var(--head);font-size:15px;color:var(--ink);display:block;line-height:1.2}
.rev .who span{font-size:12.5px;color:var(--soft)}
.note{text-align:center;margin-top:26px;font-size:13.5px;color:var(--soft);font-style:italic}

/* FAQ */
.faq{max-width:800px;margin:48px auto 0}
.acc{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:14px;overflow:hidden;transition:.2s}
.acc[open]{box-shadow:0 18px 44px -34px rgba(15,23,42,.4);border-color:#c7cdf5}
.acc summary{list-style:none;cursor:pointer;padding:22px 26px;font-family:var(--head);font-weight:600;font-size:17px;color:var(--ink);display:flex;justify-content:space-between;align-items:center;gap:16px}
.acc summary::-webkit-details-marker{display:none}
.acc summary .plus{width:30px;height:30px;border-radius:50%;background:var(--mist-2);display:grid;place-items:center;flex-shrink:0;transition:.3s;color:var(--blue-d);font-size:20px;line-height:1}
.acc[open] summary .plus{transform:rotate(45deg);background:var(--blue);color:#fff}
.acc .body{padding:0 26px 24px;color:var(--soft);font-size:15.5px}

/* PAGE HERO (sous-pages) */
.page-hero{position:relative;background:var(--navy);overflow:hidden;padding:150px 0 64px}
.page-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(800px 400px at 85% 0%,rgba(129,140,248,.2),transparent 60%)}
.page-hero .wrap{position:relative;z-index:1}
.page-hero .crumb{font-size:12.5px;color:#9fb2cc;margin-bottom:8px}
.page-hero .crumb a{color:#9fb2cc}.page-hero .crumb a:hover{color:#fff}
.page-hero .crumb span{color:var(--cyan)}
.page-hero .eyebrow{color:var(--cyan)}
.page-hero h1{color:#fff;font-size:clamp(32px,5vw,54px);margin:12px 0 12px;font-weight:800}
.page-hero p{color:#cdd9ec;max-width:620px;font-size:17.5px}

/* GALLERY */
.gal{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:200px;gap:14px;margin-top:50px}
.gal .g{overflow:hidden;border-radius:12px;background:var(--mist-2)}
.gal .g img{width:100%;height:100%;object-fit:cover;transition:.6s}
.gal .g:hover img{transform:scale(1.07)}
.gal .tall{grid-row:span 2}.gal .wide{grid-column:span 2}

/* CTA band */
.cta{position:relative;overflow:hidden;background:linear-gradient(120deg,var(--navy),var(--navy-2));color:#fff;border-radius:24px;padding:54px;text-align:center;margin:0 24px}
.cta::after{content:"";position:absolute;inset:0;background:radial-gradient(700px 300px at 20% 0%,rgba(129,140,248,.22),transparent 60%)}
.cta>*{position:relative;z-index:1}
.cta h2{color:#fff;font-size:clamp(26px,4vw,40px);margin-bottom:12px}
.cta p{color:#cdd9ec;max-width:520px;margin:0 auto 26px}
.cta .row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* CONTACT */
.contact{display:grid;grid-template-columns:1fr 1.1fr;gap:50px;margin-top:50px;align-items:start}
.cinfo .line{display:flex;gap:14px;align-items:flex-start;padding:16px 0;border-bottom:1px solid var(--line)}
.cinfo .line .ic{width:44px;height:44px;border-radius:12px;background:var(--mist);display:grid;place-items:center;color:var(--blue-d);flex:0 0 auto}
.cinfo .line b{display:block;font-family:var(--head);font-size:15px;color:var(--ink)}
.cinfo .line span,.cinfo .line a{font-size:14.5px;color:var(--soft)}
.cinfo .socials{display:flex;gap:12px;margin-top:18px}
.cinfo .socials a{width:44px;height:44px;border-radius:12px;border:1px solid var(--line);display:grid;place-items:center;color:var(--blue-d);transition:.2s}
.cinfo .socials a:hover{background:var(--blue);color:#fff;border-color:transparent}
form.box{background:#fff;border:1px solid var(--line);border-radius:18px;padding:30px;box-shadow:0 24px 50px -36px rgba(15,23,42,.4)}
.frow{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.fld{margin-bottom:16px}
.fld label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:var(--ink)}
.fld input,.fld textarea,.fld select{width:100%;font-family:var(--sans);font-size:15px;color:var(--text);background:var(--mist);border:1px solid var(--line);border-radius:10px;padding:12px 14px;transition:.2s}
.fld input:focus,.fld textarea:focus,.fld select:focus{outline:none;border-color:var(--blue);background:#fff;box-shadow:0 0 0 3px rgba(99,102,241,.15)}
.fld textarea{min-height:110px;resize:vertical}

/* FOOTER */
footer{background:var(--navy);color:#aebfd6;padding:54px 0 26px;margin-top:0}
footer .ftop{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:26px;border-bottom:1px solid rgba(255,255,255,.1)}
footer .brand{font-size:22px;margin-bottom:12px}
footer .ftop p{font-size:14px;color:#9fb2cc;max-width:300px}
.fcol h4{font-family:var(--head);font-size:13px;letter-spacing:.04em;color:#fff;margin-bottom:14px}
.fcol ul{list-style:none}.fcol li{margin-bottom:9px;font-size:14px}
.fcol a:hover{color:#fff}
.socials2{display:flex;gap:12px;margin-top:14px}
.socials2 a{width:40px;height:40px;border-radius:11px;border:1px solid rgba(255,255,255,.18);display:grid;place-items:center;color:#cdd9ec;transition:.2s}
.socials2 a:hover{background:var(--blue);color:#fff;border-color:transparent}
.fbot{margin-top:22px;font-size:12.5px;color:#7e90ab;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap}
.fbot a{color:var(--cyan)}

/* REVEAL */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.16,1,.3,1),transform .7s cubic-bezier(.16,1,.3,1)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}}

@media(max-width:900px){
  .nav-links,.nav-cta .btn,.nav-tel{display:none}
  .burger{display:block}
  .hero2 .wrap{grid-template-columns:1fr;gap:36px;padding:120px 24px 70px}
  .stats .wrap{grid-template-columns:1fr 1fr;gap:24px 20px}
  .svc{grid-template-columns:1fr}
  .why,.steps{grid-template-columns:1fr 1fr}
  .about,.about.rev{grid-template-columns:1fr;gap:34px}
  .about.rev .media{order:0}
  .reviews{grid-template-columns:1fr}
  .gal{grid-template-columns:1fr 1fr;grid-auto-rows:170px}.gal .tall{grid-row:span 1}
  .contact{grid-template-columns:1fr;gap:30px}
  footer .ftop{grid-template-columns:1fr;gap:26px}
}
@media(max-width:560px){
  section.block{padding:68px 0}
  .why,.steps{grid-template-columns:1fr}
  .frow{grid-template-columns:1fr}
  .cta{padding:40px 22px;margin:0 16px}
  .stats .wrap{grid-template-columns:1fr 1fr}
}