/* ============================================================================
   CERECO FRANCE — DESIGN SYSTEM
   Source unique de la charte. Modifie ici, tout le site suit.
   Couleurs issues du logo : Bleu #104898 · Vert #68B028 · Police Montserrat.
   ============================================================================ */

:root{
  /* Marque */
  --blue:        #104898;
  --blue-700:    #0c3a7d;
  --blue-300:    #2f6fd0;
  --green:       #68B028;
  --green-bright:#86cf3f;
  --green-50:    #eef6e3;

  /* Surfaces sombres (hero / footer) */
  --base:        #04101f;
  --navy:        #08224b;

  /* Surfaces claires (corps) */
  --paper:       #ffffff;
  --mist:        #f5f8fc;
  --line:        #e3e9f2;
  --text:        #102338;
  --muted:       #5a6b85;

  --ink-on-dark:     #f3f7fc;
  --ink-on-dark-soft:rgba(243,247,252,.74);
  --hairline-dark:   rgba(243,247,252,.16);

  --energy: linear-gradient(90deg, var(--blue) 0%, var(--blue-300) 45%, var(--green) 100%);
  --radius: 4px;
  --container: 1200px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

*{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; }
body{
  font-family:"Inter",system-ui,-apple-system,sans-serif;
  color:var(--text); background:var(--paper);
  line-height:1.6; -webkit-font-smoothing:antialiased;
}
a{ color:inherit; text-decoration:none; }
img{ max-width:100%; display:block; }
h1,h2,h3,h4{ font-family:"Montserrat",sans-serif; line-height:1.08; letter-spacing:-.02em; color:var(--text); }

.container{ max-width:var(--container); margin:0 auto; padding:0 clamp(20px,4vw,40px); }
.section{ padding:clamp(64px,9vw,120px) 0; }
.section.tight{ padding:clamp(44px,6vw,72px) 0; }
.center{ text-align:center; }

/* ---------- éléments de marque ---------- */
.eyebrow{
  display:inline-flex; align-items:center; gap:10px;
  font-family:"Montserrat",sans-serif; font-weight:700;
  font-size:12px; letter-spacing:.18em; text-transform:uppercase; color:var(--blue);
}
.eyebrow::before{ content:""; width:26px; height:3px; border-radius:2px; background:var(--energy); }
.eyebrow.on-dark{ color:var(--green-bright); }

h2.title{ font-size:clamp(28px,4.2vw,46px); font-weight:800; margin:14px 0 0; }
.lead{ font-size:clamp(16px,1.4vw,19px); color:var(--muted); max-width:62ch; }
.on-dark h2.title, .on-dark h1{ color:var(--ink-on-dark); }
.on-dark .lead{ color:var(--ink-on-dark-soft); }

/* ---------- boutons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:9px;
  font-family:"Montserrat",sans-serif; font-weight:700; font-size:15px;
  padding:14px 24px; border-radius:var(--radius); cursor:pointer;
  border:1.5px solid transparent; transition:.25s var(--ease); white-space:nowrap;
}
.btn svg{ width:16px; height:16px; }
.btn-primary{ background:var(--green); color:var(--navy); }
.btn-primary:hover{ background:var(--green-bright); transform:translateY(-2px);
  box-shadow:0 14px 34px -12px rgba(104,176,40,.65); }
.btn-blue{ background:var(--blue); color:#fff; }
.btn-blue:hover{ background:var(--blue-700); transform:translateY(-2px); }
.btn-ghost{ border-color:var(--line); color:var(--text); background:#fff; }
.btn-ghost:hover{ border-color:var(--blue); color:var(--blue); }
.btn-ghost-dark{ border-color:var(--hairline-dark); color:var(--ink-on-dark); }
.btn-ghost-dark:hover{ border-color:var(--green); background:rgba(104,176,40,.1); }

/* ---------- header ---------- */
.site-header{
  position:fixed; top:0; left:0; right:0; z-index:50;
  transition:.3s var(--ease);
}
.site-header .bar{
  display:flex; align-items:center; justify-content:space-between; gap:24px;
  padding:16px 0;
}
.site-header.scrolled{ background:rgba(255,255,255,.92); backdrop-filter:blur(12px);
  box-shadow:0 1px 0 var(--line); }
.site-header.scrolled .nav a{ color:var(--text); }
.site-header.scrolled .logo-w{ display:none; }
.site-header.scrolled .logo-c{ display:block; }
.logo-img{ height:46px; width:auto; }
.logo-c{ display:none; }
.nav{ display:flex; align-items:center; gap:28px; }
.nav a{ font-size:14.5px; font-weight:500; color:var(--ink-on-dark); position:relative; transition:color .2s; }
.nav a::after{ content:""; position:absolute; left:0; bottom:-6px; width:0; height:2px;
  background:var(--green); transition:width .25s var(--ease); }
.nav a:hover::after, .nav a.active::after{ width:100%; }
.nav .btn{ padding:11px 18px; font-size:14px; }
.burger{ display:none; flex-direction:column; gap:5px; background:none; border:0; cursor:pointer; padding:8px; }
.burger span{ width:24px; height:2px; background:var(--ink-on-dark); transition:.25s; }
.site-header.scrolled .burger span{ background:var(--text); }
@media(max-width:900px){
  .nav{ position:fixed; inset:0 0 0 auto; width:min(80vw,320px); flex-direction:column;
    align-items:flex-start; gap:8px; background:var(--paper); padding:90px 28px;
    transform:translateX(100%); transition:transform .3s var(--ease); box-shadow:-20px 0 60px rgba(0,0,0,.2); }
  .nav.open{ transform:translateX(0); }
  .nav a{ color:var(--text); font-size:17px; padding:8px 0; }
  .nav .btn{ margin-top:12px; }
  .burger{ display:flex; z-index:60; }
}

/* ---------- HERO (accueil) ---------- */
.hero{ position:relative; min-height:100svh; overflow:hidden; background:var(--base);
  color:var(--ink-on-dark); isolation:isolate; }
#field{ position:absolute; inset:0; width:100%; height:100%; z-index:0; }
.hero.no-webgl #field{ display:none; }
.hero.no-webgl{ background:
  radial-gradient(120% 90% at 80% 10%, rgba(104,176,40,.30), transparent 55%),
  radial-gradient(120% 95% at 6% 92%, rgba(16,72,152,.55), transparent 55%),
  linear-gradient(160deg, var(--navy), var(--base)); }
.hero .veil{ position:absolute; inset:0; z-index:1; pointer-events:none; background:
  linear-gradient(102deg, rgba(4,16,31,.86) 0%, rgba(4,16,31,.48) 46%, rgba(4,16,31,0) 74%),
  linear-gradient(0deg, rgba(4,16,31,.66) 0%, transparent 42%); }
.hero .inner{ position:relative; z-index:2; min-height:100svh; display:flex; flex-direction:column;
  justify-content:center; padding-top:90px; padding-bottom:60px; max-width:920px; }
.hero h1{ font-weight:800; font-size:clamp(40px,7vw,86px); margin:22px 0 22px; text-wrap:balance; color:var(--ink-on-dark); }
.hero h1 .glow{ background:linear-gradient(92deg,var(--green),var(--green-bright));
  -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent; }
.hero .sub{ font-size:clamp(16px,1.5vw,20px); color:var(--ink-on-dark-soft); max-width:580px; margin-bottom:34px; }
.hero .cta-row{ display:flex; gap:14px; flex-wrap:wrap; }
.dot{ width:7px; height:7px; border-radius:50%; background:var(--green);
  box-shadow:0 0 0 0 rgba(104,176,40,.6); animation:pulse 2.6s infinite; }
@keyframes pulse{ 0%{box-shadow:0 0 0 0 rgba(104,176,40,.5);} 70%{box-shadow:0 0 0 11px rgba(104,176,40,0);} 100%{box-shadow:0 0 0 0 rgba(104,176,40,0);} }
.eyebrow.pill{ padding:8px 15px; border:1px solid var(--hairline-dark); border-radius:100px;
  backdrop-filter:blur(6px); color:var(--ink-on-dark-soft); }
.eyebrow.pill::before{ display:none; }
.univers-row{ display:flex; gap:14px 30px; flex-wrap:wrap; align-items:center;
  margin-top:40px; padding-top:26px; border-top:1px solid var(--hairline-dark); font-size:13px; color:var(--ink-on-dark-soft); }
.seg{ display:flex; align-items:center; gap:12px; flex-wrap:wrap; }
.seg .tag{ font-family:"Montserrat",sans-serif; font-weight:700; font-size:11px; letter-spacing:.14em;
  text-transform:uppercase; padding:5px 11px; border-radius:100px; }
.seg.house .tag{ color:var(--green-bright); border:1px solid rgba(104,176,40,.45); }
.seg.build .tag{ color:var(--blue-300); border:1px solid rgba(47,111,208,.5); }
.seg b{ color:var(--ink-on-dark); font-weight:600; }

/* ---------- page-top (pages internes) ---------- */
.page-top{ position:relative; background:linear-gradient(150deg,var(--navy),var(--base));
  color:var(--ink-on-dark); padding:clamp(120px,16vh,180px) 0 clamp(48px,7vw,80px); overflow:hidden; }
.page-top::after{ content:""; position:absolute; left:0; right:0; bottom:0; height:4px; background:var(--energy); }
.page-top::before{ content:""; position:absolute; inset:0; opacity:.5; pointer-events:none;
  background:radial-gradient(80% 120% at 88% 0%, rgba(104,176,40,.22), transparent 60%); }
.crumb{ font-size:13px; color:var(--ink-on-dark-soft); margin-bottom:18px; position:relative; z-index:2; }
.crumb a:hover{ color:var(--green-bright); }
.page-top h1{ position:relative; z-index:2; font-size:clamp(34px,5.5vw,62px); font-weight:800; color:var(--ink-on-dark); max-width:18ch; }
.page-top .sub{ position:relative; z-index:2; color:var(--ink-on-dark-soft); max-width:60ch; margin-top:18px; font-size:clamp(16px,1.4vw,19px); }
.page-top .cta-row{ position:relative; z-index:2; margin-top:30px; display:flex; gap:14px; flex-wrap:wrap; }

/* ---------- cartes prestations ---------- */
.grid{ display:grid; gap:22px; }
.grid.cols-2{ grid-template-columns:repeat(2,1fr); }
.grid.cols-3{ grid-template-columns:repeat(3,1fr); }
.grid.cols-4{ grid-template-columns:repeat(4,1fr); }
@media(max-width:980px){ .grid.cols-4{ grid-template-columns:repeat(2,1fr); } .grid.cols-3{ grid-template-columns:1fr 1fr; } }
@media(max-width:680px){ .grid.cols-2,.grid.cols-3,.grid.cols-4{ grid-template-columns:1fr; } }

.card{ background:var(--paper); border:1px solid var(--line); border-radius:10px; padding:28px;
  transition:.28s var(--ease); position:relative; overflow:hidden; }
.card::before{ content:""; position:absolute; left:0; top:0; bottom:0; width:4px; background:var(--blue); transform:scaleY(0); transform-origin:top; transition:transform .3s var(--ease); }
.card:hover{ transform:translateY(-5px); border-color:transparent; box-shadow:0 24px 50px -22px rgba(16,35,56,.28); }
.card:hover::before{ transform:scaleY(1); }
.card.house::before{ background:var(--green); }
.card .ico{ width:46px; height:46px; border-radius:10px; display:grid; place-items:center; margin-bottom:18px;
  background:var(--green-50); color:var(--blue); }
.card.house .ico{ color:#3e7a13; }
.card .ico svg{ width:24px; height:24px; }
.card h3{ font-size:20px; font-weight:700; margin-bottom:8px; }
.card p{ color:var(--muted); font-size:15px; }
.card .more{ display:inline-flex; align-items:center; gap:7px; margin-top:16px; font-weight:600; font-size:14px; color:var(--blue); }
.card.house .more{ color:#3e7a13; }
.card .more svg{ width:15px; height:15px; transition:transform .25s; }
.card:hover .more svg{ transform:translateX(4px); }

/* univers (2 grandes cartes) */
.univers-card{ position:relative; border-radius:14px; overflow:hidden; padding:38px; color:#fff;
  min-height:280px; display:flex; flex-direction:column; justify-content:flex-end; }
.univers-card.house{ background:linear-gradient(140deg,#4f8f1d,#3e7a13); }
.univers-card.build{ background:linear-gradient(140deg,var(--blue),var(--blue-700)); }
.univers-card .tag{ font-family:"Montserrat",sans-serif; font-weight:700; font-size:12px; letter-spacing:.16em;
  text-transform:uppercase; opacity:.85; }
.univers-card h3{ color:#fff; font-size:26px; font-weight:800; margin:8px 0 10px; }
.univers-card p{ opacity:.9; font-size:15px; margin-bottom:18px; }
.univers-card .chips{ display:flex; gap:8px; flex-wrap:wrap; margin-bottom:20px; }
.univers-card .chip{ font-size:12.5px; padding:5px 11px; border-radius:100px; background:rgba(255,255,255,.16); font-weight:600; }
.univers-card .more{ display:inline-flex; align-items:center; gap:8px; font-weight:700; font-family:"Montserrat",sans-serif; }
.univers-card .more svg{ width:16px; height:16px; transition:transform .25s; }
.univers-card:hover .more svg{ transform:translateX(5px); }

/* ---------- "pourquoi" / features ---------- */
.feat{ display:flex; gap:16px; align-items:flex-start; }
.feat .ico{ flex:0 0 44px; width:44px; height:44px; border-radius:10px; background:var(--green-50);
  display:grid; place-items:center; color:var(--blue); }
.feat .ico svg{ width:23px; height:23px; }
.feat h3{ font-size:17px; font-weight:700; margin-bottom:4px; }
.feat p{ font-size:14.5px; color:var(--muted); }

/* ---------- stats ---------- */
.stats{ background:linear-gradient(135deg,var(--navy),var(--base)); color:var(--ink-on-dark); position:relative; overflow:hidden; }
.stats::after{ content:""; position:absolute; left:0; right:0; top:0; height:4px; background:var(--energy); }
.stats .grid{ text-align:center; }
.stat .num{ font-family:"Montserrat",sans-serif; font-weight:900; font-size:clamp(38px,6vw,60px);
  background:linear-gradient(92deg,var(--green-bright),#bfe88f); -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent; line-height:1; }
.stat .lbl{ color:var(--ink-on-dark-soft); font-size:14px; margin-top:8px; }

/* ---------- process (étapes) ---------- */
.steps{ counter-reset:step; display:grid; gap:4px; }
.step{ display:flex; gap:20px; padding:22px 0; border-top:1px solid var(--line); }
.step:last-child{ border-bottom:1px solid var(--line); }
.step .n{ counter-increment:step; flex:0 0 auto; }
.step .n::before{ content:counter(step,decimal-leading-zero); font-family:"Montserrat",sans-serif;
  font-weight:800; font-size:20px; color:var(--green); }
.step h3{ font-size:18px; font-weight:700; margin-bottom:5px; }
.step p{ color:var(--muted); font-size:15px; }

/* ---------- liste à coches ---------- */
.checklist{ list-style:none; display:grid; gap:13px; }
.checklist li{ display:flex; gap:12px; align-items:flex-start; font-size:15.5px; }
.checklist svg{ flex:0 0 22px; width:22px; height:22px; color:var(--green); margin-top:1px; }

/* ---------- échelle DPE (signature métier) ---------- */
.dpe{ display:flex; gap:4px; border-radius:8px; overflow:hidden; max-width:420px; }
.dpe span{ flex:1; padding:10px 0; text-align:center; color:#fff; font-family:"Montserrat",sans-serif;
  font-weight:800; font-size:14px; }
.dpe .a{ background:#319a4f; } .dpe .b{ background:#52a447; } .dpe .c{ background:#a0c043; }
.dpe .d{ background:#f3d240; color:#5a4b00; } .dpe .e{ background:#efa53a; }
.dpe .f{ background:#e36f2e; } .dpe .g{ background:#d23f33; }

/* ---------- bandeau panel info ---------- */
.panel{ background:var(--mist); border:1px solid var(--line); border-radius:14px; padding:clamp(26px,4vw,40px); }
.panel.green{ background:var(--green-50); border-color:#d9ecc4; }

/* ---------- CTA bande ---------- */
.cta-band{ background:linear-gradient(120deg,var(--blue),var(--navy)); color:var(--ink-on-dark);
  border-radius:16px; padding:clamp(34px,5vw,56px); text-align:center; position:relative; overflow:hidden; }
.cta-band::before{ content:""; position:absolute; inset:0; opacity:.55;
  background:radial-gradient(70% 140% at 85% 10%, rgba(104,176,40,.3), transparent 60%); }
.cta-band > *{ position:relative; z-index:2; }
.cta-band h2{ color:var(--ink-on-dark); font-size:clamp(26px,3.6vw,40px); font-weight:800; }
.cta-band p{ color:var(--ink-on-dark-soft); max-width:54ch; margin:14px auto 26px; }

/* ---------- formulaire ---------- */
.form{ display:grid; gap:16px; }
.form .row{ display:grid; grid-template-columns:1fr 1fr; gap:16px; }
@media(max-width:560px){ .form .row{ grid-template-columns:1fr; } }
.field label{ display:block; font-size:13px; font-weight:600; margin-bottom:6px; color:var(--text); }
.field input, .field select, .field textarea{ width:100%; padding:13px 15px; border:1.5px solid var(--line);
  border-radius:var(--radius); font:inherit; font-size:15px; background:#fff; transition:border-color .2s; }
.field input:focus, .field select:focus, .field textarea:focus{ outline:none; border-color:var(--blue); }
.field textarea{ min-height:130px; resize:vertical; }

/* ---------- footer ---------- */
.site-footer{ background:var(--base); color:var(--ink-on-dark-soft); padding:clamp(48px,7vw,76px) 0 28px; }
.site-footer .cols{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1.2fr; gap:36px; }
@media(max-width:840px){ .site-footer .cols{ grid-template-columns:1fr 1fr; gap:30px; } }
@media(max-width:520px){ .site-footer .cols{ grid-template-columns:1fr; } }
.site-footer h4{ font-family:"Montserrat",sans-serif; color:var(--ink-on-dark); font-size:13px;
  letter-spacing:.12em; text-transform:uppercase; margin-bottom:16px; font-weight:700; }
.site-footer a{ display:block; padding:5px 0; font-size:14.5px; transition:color .2s; }
.site-footer a:hover{ color:var(--green-bright); }
.site-footer .logo-img{ height:54px; margin-bottom:16px; }
.site-footer .blurb{ font-size:14px; max-width:30ch; }
.foot-bottom{ border-top:1px solid var(--hairline-dark); margin-top:40px; padding-top:22px;
  display:flex; justify-content:space-between; gap:14px; flex-wrap:wrap; font-size:13px; }
.placeholder{ color:var(--green-bright); }

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

/* ============================================================================
   ACCUEIL ÉPURÉ — composants additionnels
   ============================================================================ */
.statement{ max-width:780px; }
.statement .big{ font-family:"Montserrat",sans-serif; font-weight:700;
  font-size:clamp(24px,3.2vw,36px); line-height:1.28; letter-spacing:-.02em; color:var(--text); }
.statement .big em{ font-style:normal; color:var(--blue); }

/* grille de prestations en filets fins (éditorial) */
.svc-grid{ display:grid; grid-template-columns:repeat(2,1fr); border-top:1px solid var(--line); }
@media(max-width:760px){ .svc-grid{ grid-template-columns:1fr; } }
.svc{ position:relative; display:block; padding:clamp(28px,3.5vw,40px);
  border-bottom:1px solid var(--line); border-right:1px solid var(--line); transition:background .25s var(--ease); }
.svc:nth-child(2n){ border-right:0; }
@media(max-width:760px){ .svc{ border-right:0; } }
.svc:hover{ background:var(--mist); }
.svc .k{ display:flex; align-items:center; gap:9px; font-family:"Montserrat",sans-serif; font-weight:700;
  font-size:11px; letter-spacing:.14em; text-transform:uppercase; color:var(--muted); margin-bottom:16px; }
.svc .k .d{ width:8px; height:8px; border-radius:50%; }
.svc.house .k .d{ background:var(--green); }
.svc.build .k .d{ background:var(--blue); }
.svc h3{ font-size:clamp(20px,2.2vw,25px); font-weight:700; margin-bottom:9px; }
.svc p{ color:var(--muted); font-size:15px; max-width:44ch; }
.svc .arrow{ position:absolute; top:clamp(28px,3.5vw,40px); right:clamp(28px,3.5vw,40px);
  width:20px; height:20px; color:var(--line); transition:.25s var(--ease); }
.svc:hover .arrow{ color:var(--green); transform:translate(3px,-3px); }

/* bandeau de confiance (RGE OPQIBI + faits clés) */
.trust{ display:flex; align-items:center; justify-content:center; gap:clamp(28px,6vw,72px); flex-wrap:wrap; }
.trust .badges{ display:flex; gap:14px; flex-wrap:wrap; justify-content:center; align-items:stretch; }
.trust .badge{ background:#fff; border:1px solid var(--line); border-radius:12px;
  padding:14px 20px; display:grid; place-items:center; box-shadow:0 12px 32px -20px rgba(16,35,56,.28); }
.trust .badge img{ height:84px; width:auto; display:block; }
.trust .badge.cart img{ height:104px; }
.trust .facts{ display:flex; gap:clamp(22px,4vw,56px); flex-wrap:wrap; }
.trust .fact .n{ font-family:"Montserrat",sans-serif; font-weight:800; font-size:clamp(20px,2.4vw,28px); color:var(--blue); line-height:1; }
.trust .fact .l{ font-size:13px; color:var(--muted); margin-top:6px; }