/* =========================================================
   GRD Sanitaire-Chauffage — design system
   Bleu foncé (confiance/eau) + Rouge (chauffage/CTA)
   Atelier AI · 2026
   ========================================================= */
:root{
  --blue:#392D5F;        /* bleu foncé dominant */
  --blue-2:#4E3E7A;
  --blue-soft:#EFEBF7;
  --red:#C94449;         /* rouge accent / chauffage */
  --red-2:#A8383C;
  --ink:#15202B;
  --body:#48566A;
  --muted:#7A879A;
  --bg:#FFFFFF;
  --bg-2:#F4F7FB;
  --line:#E4E9F1;
  --line-2:#D4DCE8;
  --maxw:1200px;
  --ease:cubic-bezier(.16,1,.3,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;color:var(--body);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--red);outline-offset:3px;border-radius:4px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
h1,h2,h3,h4{font-family:'Space Grotesk','Inter',sans-serif;color:var(--ink);line-height:1.1}
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;font-family:'Inter',sans-serif;font-size:15px;font-weight:600;padding:14px 24px;border-radius:8px;cursor:pointer;border:2px solid transparent;transition:all .2s ease;white-space:nowrap}
.btn-primary{background:var(--red);color:#fff;border-color:var(--red)}
.btn-primary:hover{background:var(--red-2);border-color:var(--red-2);transform:translateY(-1px)}
.btn-blue{background:var(--blue);color:#fff;border-color:var(--blue)}
.btn-blue:hover{background:var(--blue-2);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--blue);border-color:var(--line-2)}
.btn-ghost:hover{border-color:var(--blue);background:var(--blue-soft)}
.btn-white{background:#fff;color:var(--blue);border-color:#fff}
.btn-white:hover{background:#f1f4f9}
.btn .arr{transition:transform .2s}
.btn:hover .arr{transform:translateX(3px)}

/* ---------- header ---------- */
header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:76px}
.logo img{height:42px;width:auto}
nav.links{display:flex;align-items:center;gap:30px}
nav.links a{font-size:15px;font-weight:600;color:var(--ink);transition:color .2s;position:relative;padding:4px 0}
nav.links a:hover{color:var(--red)}
nav.links a[aria-current="page"]{color:var(--red)}
nav.links a[aria-current="page"]::after{content:'';position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--red)}
.nav-cta{display:flex;align-items:center;gap:18px}
.nav-phone{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--blue);font-size:15px}
.nav-phone svg{width:18px;height:18px;color:var(--red)}
.menu-toggle{display:none;background:none;border:none;cursor:pointer;width:30px;height:22px;position:relative}
.menu-toggle span{position:absolute;left:0;right:0;height:2.5px;background:var(--blue);border-radius:2px;transition:.3s var(--ease)}
.menu-toggle span:nth-child(1){top:0}.menu-toggle span:nth-child(2){top:9px}.menu-toggle span:nth-child(3){top:18px}
body.menu-open .menu-toggle span:nth-child(1){top:9px;transform:rotate(45deg)}
body.menu-open .menu-toggle span:nth-child(2){opacity:0}
body.menu-open .menu-toggle span:nth-child(3){top:9px;transform:rotate(-45deg)}

/* ---------- shared section ---------- */
section.block{padding:96px 0}
.eyebrow{font-family:'Space Grotesk',sans-serif;font-size:13px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:var(--red);margin-bottom:16px;display:flex;align-items:center;gap:12px}
.eyebrow::before{content:'';width:28px;height:2px;background:var(--red)}
.sec-head{font-size:clamp(28px,4vw,44px);font-weight:700;letter-spacing:-1px}
.lead{color:var(--body);font-size:clamp(16px,1.5vw,18px);max-width:620px;line-height:1.7}

/* ---------- hero ---------- */
.hero{position:relative;background:linear-gradient(180deg,#fff 0%,var(--bg-2) 100%);overflow:hidden;border-bottom:1px solid var(--line)}
.hero::before{content:'';position:absolute;top:-120px;right:-120px;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(225,29,42,.06),transparent 70%);pointer-events:none}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;padding:80px 0 88px}
.hero h1{font-size:clamp(34px,5vw,58px);font-weight:700;letter-spacing:-1.8px;line-height:1.05;color:var(--ink)}
.hero h1 .hl{color:var(--red)}
.hero p.sub{font-size:clamp(16px,1.8vw,20px);color:var(--body);margin:24px 0 32px;max-width:540px;line-height:1.6}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-trust{display:flex;gap:26px;flex-wrap:wrap;margin-top:34px;padding-top:26px;border-top:1px solid var(--line)}
.trust-item{display:flex;align-items:center;gap:9px;font-size:14px;font-weight:600;color:var(--blue)}
.trust-item svg{width:20px;height:20px;color:var(--red);flex-shrink:0}
.hero-visual{position:relative;aspect-ratio:4/3.4;border-radius:20px;overflow:hidden;border:1px solid var(--line-2);background:linear-gradient(140deg,var(--blue),#241B3D);box-shadow:0 24px 60px -24px rgba(57,45,95,.5)}
.hero-visual .hv-pattern{position:absolute;inset:0;opacity:.5;background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);background-size:34px 34px}
.hero-visual .hv-mark{position:absolute;inset:0;display:flex;align-items:center;justify-content:center}
.hero-visual .hv-mark svg{width:46%;height:auto;opacity:.95;filter:drop-shadow(0 10px 30px rgba(0,0,0,.35))}
.hero-visual .hv-note{position:absolute;left:18px;bottom:16px;right:18px;font-family:'Space Grotesk',sans-serif;font-size:11px;letter-spacing:1.5px;text-transform:uppercase;color:rgba(255,255,255,.55);border:1px dashed rgba(255,255,255,.2);padding:8px 10px;border-radius:8px}

/* ---------- services bar (sectors) ---------- */
.specs{background:var(--blue);color:#fff}
.specs .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:22px;padding:26px 28px}
.spec{display:flex;align-items:center;gap:12px;font-size:15px;font-weight:600}
.spec svg{width:24px;height:24px;color:#fff;opacity:.9;flex-shrink:0}
.spec b{color:#fff}
.spec span{color:rgba(255,255,255,.7);font-weight:500}

/* ---------- services cards ---------- */
.svc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:48px}
.svc-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:32px;transition:border-color .3s,transform .3s,box-shadow .3s}
.svc-card:hover{border-color:var(--line-2);transform:translateY(-4px);box-shadow:0 18px 40px -22px rgba(57,45,95,.28)}
.svc-ic{width:52px;height:52px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:var(--blue-soft);margin-bottom:20px}
.svc-ic svg{width:26px;height:26px;color:var(--blue)}
.svc-card.heat .svc-ic{background:#F7E7E8}
.svc-card.heat .svc-ic svg{color:var(--red)}
.svc-card h3{font-size:21px;font-weight:700;margin-bottom:10px;letter-spacing:-.4px}
.svc-card p{font-size:15px;color:var(--body);line-height:1.6}
.svc-card ul{list-style:none;margin-top:16px}
.svc-card li{font-size:14px;color:var(--body);padding:7px 0 7px 24px;position:relative;border-top:1px solid var(--line)}
.svc-card li::before{content:'';position:absolute;left:0;top:14px;width:8px;height:8px;border-radius:2px;background:var(--red)}

/* ---------- atouts ---------- */
.atouts{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:48px}
.atout{padding:30px;border-radius:16px;background:var(--bg-2);border:1px solid var(--line)}
.atout .ai{width:46px;height:46px;color:var(--red);margin-bottom:18px}
.atout h3{font-size:19px;font-weight:700;margin-bottom:10px;letter-spacing:-.3px}
.atout p{font-size:15px;color:var(--body);line-height:1.6}

/* ---------- zone ---------- */
.zone-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.zone-map{aspect-ratio:16/12;border-radius:18px;overflow:hidden;border:1px solid var(--line-2);background:linear-gradient(150deg,#EFEBF7,#E4DEF2);position:relative;display:flex;align-items:center;justify-content:center}
.zone-map .zm-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(57,45,95,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(57,45,95,.05) 1px,transparent 1px);background-size:30px 30px}
.zone-map .zm-pin{position:relative;text-align:center}
.zone-map .zm-pin svg{width:48px;height:48px;color:var(--red);filter:drop-shadow(0 6px 10px rgba(225,29,42,.3))}
.zone-map .zm-pin div{font-family:'Space Grotesk',sans-serif;font-weight:700;color:var(--blue);margin-top:4px;font-size:16px}
.zone-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.zone-list span{background:#fff;border:1px solid var(--line);border-radius:100px;padding:8px 16px;font-size:14px;font-weight:600;color:var(--blue)}

/* ---------- process ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:48px}
.step{padding:34px 30px;border-left:1px solid var(--line);position:relative}
.step:first-child{border-left:none;padding-left:0}
.step .sn{font-family:'Space Grotesk',sans-serif;font-size:14px;font-weight:700;color:#fff;background:var(--red);width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin-bottom:20px}
.step h3{font-size:20px;font-weight:700;margin-bottom:10px;letter-spacing:-.3px}
.step p{font-size:15px;color:var(--body);line-height:1.6}

/* ---------- urgence band ---------- */
.urgence{background:var(--blue);color:#fff;border-radius:20px;padding:clamp(34px,5vw,52px);display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap;position:relative;overflow:hidden}
.urgence::after{content:'';position:absolute;right:-80px;top:-80px;width:300px;height:300px;border-radius:50%;background:radial-gradient(circle,rgba(225,29,42,.25),transparent 70%)}
.urgence .u-txt{position:relative}
.urgence h2{color:#fff;font-size:clamp(24px,3.4vw,34px);font-weight:700;letter-spacing:-.8px}
.urgence p{color:rgba(255,255,255,.78);margin-top:10px;font-size:16px;max-width:520px}
.urgence .u-cta{position:relative;display:flex;flex-direction:column;align-items:flex-end;gap:8px}
.urgence .u-phone{font-family:'Space Grotesk',sans-serif;font-size:clamp(22px,3vw,30px);font-weight:700;color:#fff;display:flex;align-items:center;gap:10px}
.urgence .u-phone svg{width:26px;height:26px;color:var(--red)}

/* ---------- cta box ---------- */
.cta-box{background:var(--bg-2);border:1px solid var(--line);border-radius:20px;padding:clamp(36px,5vw,64px);text-align:center}
.cta-box h2{font-size:clamp(26px,4vw,42px);font-weight:700;letter-spacing:-1px;max-width:680px;margin:0 auto}
.cta-box p{color:var(--body);font-size:18px;margin:18px auto 30px;max-width:520px}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ---------- page hero (inner) ---------- */
.page-hero{background:linear-gradient(180deg,#fff,var(--bg-2));border-bottom:1px solid var(--line);padding:64px 0 56px}
.crumb{font-size:13px;color:var(--muted);margin-bottom:14px;font-weight:600}
.crumb a:hover{color:var(--red)}
.page-hero h1{font-size:clamp(32px,5vw,52px);font-weight:700;letter-spacing:-1.5px}
.page-hero h1 .hl{color:var(--red)}
.page-hero p{margin-top:18px;color:var(--body);font-size:clamp(16px,1.6vw,19px);max-width:600px;line-height:1.6}

/* ---------- service detail (prestations) ---------- */
.svc-detail{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding:72px 0;border-top:1px solid var(--line);scroll-margin-top:90px}
.svc-detail:nth-child(even) .svc-visual{order:-1}
.svc-detail h2{font-size:clamp(24px,3.2vw,34px);font-weight:700;letter-spacing:-.8px;margin-bottom:16px}
.svc-detail h2 .hl{color:var(--red)}
.svc-detail p{font-size:16px;color:var(--body);line-height:1.7;margin-bottom:18px}
.svc-detail .chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.svc-detail .chips span{background:var(--blue-soft);color:var(--blue);border-radius:8px;padding:9px 14px;font-size:14px;font-weight:600}
.svc-visual{aspect-ratio:4/3;border-radius:18px;border:1px solid var(--line-2);background:linear-gradient(140deg,var(--blue),#241B3D);position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden}
.svc-visual .sv-grid{position:absolute;inset:0;opacity:.5;background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);background-size:32px 32px}
.svc-visual svg{width:38%;height:auto;color:#fff;opacity:.92;position:relative}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1.25fr 1fr;gap:56px;align-items:start}
.field{margin-bottom:20px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--ink);margin-bottom:8px}
.field input,.field select,.field textarea{width:100%;background:#fff;border:1.5px solid var(--line-2);border-radius:10px;padding:13px 15px;font-family:'Inter',sans-serif;font-size:15px;color:var(--ink);transition:border-color .2s}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--red)}
.field textarea{resize:vertical;min-height:130px}
.frow{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.contact-aside .ca-card{background:var(--blue);color:#fff;border-radius:18px;padding:32px;margin-bottom:18px}
.contact-aside .ca-card h2,.contact-aside .ca-card h3{color:#fff;font-size:19px;margin-bottom:18px}
.ca-row{display:flex;gap:14px;align-items:flex-start;padding:13px 0;border-top:1px solid rgba(255,255,255,.12)}
.ca-row:first-of-type{border-top:none}
.ca-row svg{width:22px;height:22px;color:var(--red);flex-shrink:0;margin-top:2px}
.ca-row .l{font-size:12px;color:rgba(255,255,255,.6);text-transform:uppercase;letter-spacing:1px;margin-bottom:3px}
.ca-row .v{font-size:15.5px;font-weight:600;color:#fff;line-height:1.4}
.ca-row .v a:hover{color:var(--red)}
#form-ok{display:none;margin-top:18px;padding:15px 18px;border:1.5px solid var(--red);background:#F8E8E9;border-radius:10px;color:var(--ink);font-size:14.5px}

/* ---------- footer ---------- */
footer{background:var(--blue);color:#fff;padding:60px 0 36px}
.foot-top{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px}
.foot-brand img{height:44px;margin-bottom:18px}
.foot-brand p{color:rgba(255,255,255,.65);font-size:14px;max-width:300px;line-height:1.6}
.foot-col h4{font-family:'Space Grotesk',sans-serif;font-size:13px;letter-spacing:1px;text-transform:uppercase;color:rgba(255,255,255,.55);margin-bottom:16px}
.foot-col a,.foot-col p{display:block;color:rgba(255,255,255,.82);font-size:14px;margin-bottom:11px;transition:color .2s;line-height:1.5}
.foot-col a:hover{color:var(--red)}
.foot-bottom{margin-top:46px;padding-top:24px;border-top:1px solid rgba(255,255,255,.13);display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;font-size:13px;color:rgba(255,255,255,.55)}
.foot-bottom .credit b{color:#fff;font-weight:600}

/* ---------- responsive ---------- */
@media(max-width:960px){
  .hero-grid,.zone-grid,.svc-detail,.contact-grid{grid-template-columns:1fr;gap:36px}
  .svc-detail:nth-child(even) .svc-visual{order:0}
  .svc-grid,.atouts,.steps,.foot-top{grid-template-columns:1fr}
  .atouts,.svc-grid{gap:18px}
  .step{border-left:none;border-top:1px solid var(--line);padding:30px 0 0}
  .step:first-child{border-top:none;padding-top:0}
  .hero-visual{max-width:460px}
}
@media(max-width:820px){
  nav.links,.nav-phone{display:none}
  .menu-toggle{display:block}
  body.menu-open nav.links{display:flex;flex-direction:column;align-items:flex-start;gap:4px;position:fixed;top:76px;left:0;right:0;background:#fff;padding:20px 28px 28px;border-bottom:1px solid var(--line);z-index:99;box-shadow:0 20px 40px -20px rgba(57,45,95,.25)}
  body.menu-open nav.links a{font-size:18px;padding:12px 0;width:100%}
  section.block{padding:68px 0}
  .frow{grid-template-columns:1fr;gap:0}
  .urgence{flex-direction:column;align-items:flex-start}
  .urgence .u-cta{align-items:flex-start;max-width:100%}
  .urgence .u-cta .btn{max-width:100%;white-space:normal;text-align:center}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;scroll-behavior:auto!important}.reveal{opacity:1!important;transform:none!important;transition:none!important}}

/* ---------- photos réalisations ---------- */
.hero-visual .hv-photo,.svc-visual .sv-photo,.zone-map .zm-photo{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hv-caption,.zm-caption{position:absolute;left:16px;bottom:14px;font-family:'Space Grotesk',sans-serif;font-size:11px;letter-spacing:1.5px;text-transform:uppercase;color:#fff;background:rgba(26,20,46,.55);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);padding:8px 12px;border-radius:8px;z-index:1}
.ca-photo{position:relative;border-radius:18px;overflow:hidden;border:1px solid var(--line);margin-bottom:18px}
.ca-photo img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover}
.ca-photo .cap{position:absolute;left:14px;bottom:12px;font-family:'Space Grotesk',sans-serif;font-size:11px;letter-spacing:1.2px;text-transform:uppercase;color:#fff;background:rgba(26,20,46,.55);padding:7px 11px;border-radius:8px}