/* ============================================
   COOL ROOF SAVOIE — style.css
   Palette : blanc (le produit), bleu glacier,
   accent chaleur réservé au "avant".
   ============================================ */

:root{
  --fond:#F7FAFC;
  --papier:#FFFFFF;
  --encre:#14283A;
  --encre-2:#3D5468;
  --glacier:#0C4A73;
  --glacier-fonce:#08344F;
  --ciel:#DCEEF8;
  --ciel-2:#EAF5FB;
  --chaleur:#E4572E;
  --chaleur-fond:#FBE9E2;
  --trait:#D5E3ED;
  --radius:14px;
  --maxw:1120px;
  --font-display:"Archivo",system-ui,sans-serif;
  --font-body:"Inter",system-ui,sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}

body{
  font-family:var(--font-body);
  color:var(--encre);
  background:var(--fond);
  line-height:1.65;
  font-size:16.5px;
  -webkit-font-smoothing:antialiased;
}

img{max-width:100%;display:block}
a{color:var(--glacier)}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

h1,h2,h3{font-family:var(--font-display);line-height:1.15;letter-spacing:-.015em}
h1{font-size:clamp(2.1rem,4.6vw,3.4rem);font-weight:800}
h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:700}
h3{font-size:1.15rem;font-weight:700}

.eyebrow{
  display:inline-block;
  font-family:var(--font-display);
  font-size:.78rem;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:.14em;
  color:var(--glacier);
  background:var(--ciel);
  padding:6px 12px;
  border-radius:99px;
  margin-bottom:16px;
}

/* ---------- Header ---------- */
.header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--trait);
}
.header .wrap{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;
  height:68px;
}
.logo{
  font-family:var(--font-display);
  font-weight:800;font-size:1.12rem;
  color:var(--encre);text-decoration:none;
  display:flex;align-items:center;gap:10px;
  white-space:nowrap;flex:none;
}
.logo-mark{
  width:30px;height:30px;border-radius:8px;flex:none;
  background:linear-gradient(135deg,var(--chaleur) 0 50%,var(--glacier) 50% 100%);
  position:relative;
}
.logo-mark::after{
  content:"";position:absolute;inset:8px;
  background:#fff;border-radius:3px;
  clip-path:polygon(50% 0,100% 60%,100% 100%,0 100%,0 60%);
}
.nav{display:flex;gap:20px;align-items:center;flex-wrap:nowrap}
.nav a{
  text-decoration:none;color:var(--encre-2);
  font-weight:500;font-size:.93rem;
  white-space:nowrap;
}
.nav .btn{padding:10px 18px;font-size:.9rem}
@media(max-width:1150px){
  .nav{gap:14px}
  .nav a{font-size:.88rem}
}
@media(max-width:1020px){
  .nav-lien{display:none}
}
.nav a:hover{color:var(--glacier)}
.btn{
  display:inline-block;
  font-family:var(--font-display);
  font-weight:700;font-size:.95rem;
  text-decoration:none;
  background:var(--glacier);color:#fff!important;
  padding:12px 22px;border-radius:99px;
  border:none;cursor:pointer;
  transition:background .18s ease,transform .18s ease;
}
.btn:hover{background:var(--glacier-fonce);transform:translateY(-1px)}
.btn-grand{font-size:1.05rem;padding:15px 30px}
.btn-blanc{background:#fff;color:var(--glacier)!important}
.btn-blanc:hover{background:var(--ciel-2)}
.nav-tel{font-weight:700;color:var(--glacier)!important}

/* ---------- Hero ---------- */
.hero{
  background:linear-gradient(180deg,#fff 0%,var(--ciel-2) 100%);
  padding:72px 0 0;
  overflow:hidden;
}
.hero-grid{
  display:grid;grid-template-columns:1.05fr .95fr;
  gap:48px;align-items:center;
}
.hero p.lead{
  font-size:1.15rem;color:var(--encre-2);
  margin:20px 0 30px;max-width:34em;
}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;align-items:center;margin-bottom:26px}
.hero-note{font-size:.9rem;color:var(--encre-2)}

/* Signature : le toit thermique avant/après */
.thermo-toit{
  position:relative;
  border-radius:var(--radius) var(--radius) 0 0;
  overflow:hidden;
  box-shadow:0 18px 50px rgba(12,74,115,.18);
}
.thermo-toit svg{display:block;width:100%;height:auto}
.thermo-legende{
  display:flex;
  font-family:var(--font-display);
  font-weight:700;font-size:.9rem;
  text-align:center;
}
.thermo-legende div{flex:1;padding:12px 8px;color:#fff}
.leg-avant{background:var(--chaleur)}
.leg-apres{background:var(--glacier)}
.thermo-legende span{display:block;font-size:1.5rem;font-weight:800;letter-spacing:-.02em}

/* ---------- Bandes chiffres ---------- */
.bande-chiffres{
  background:var(--glacier-fonce);color:#fff;
  padding:34px 0;
}
.bande-chiffres .wrap{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
}
.chiffre b{
  display:block;
  font-family:var(--font-display);
  font-size:1.9rem;font-weight:800;letter-spacing:-.02em;
}
.chiffre span{font-size:.9rem;opacity:.85}

/* ---------- Sections ---------- */
.section{padding:80px 0}
.section-ciel{background:var(--ciel-2)}
.section-titre{max-width:44em;margin-bottom:44px}
.section-titre p{color:var(--encre-2);margin-top:14px;font-size:1.05rem}

.cartes{
  display:grid;grid-template-columns:repeat(3,1fr);gap:22px;
}
.carte{
  background:var(--papier);
  border:1px solid var(--trait);
  border-radius:var(--radius);
  padding:28px 26px;
}
.carte h3{margin-bottom:10px}
.carte p{color:var(--encre-2);font-size:.97rem}
.carte-ico{
  width:44px;height:44px;border-radius:12px;
  background:var(--ciel);color:var(--glacier);
  display:flex;align-items:center;justify-content:center;
  font-size:1.3rem;margin-bottom:16px;
}

/* ---------- Process ---------- */
.etapes{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.etape{
  background:var(--papier);border:1px solid var(--trait);
  border-radius:var(--radius);padding:26px 24px;position:relative;
}
.etape b.num{
  font-family:var(--font-display);font-weight:800;
  color:var(--glacier);font-size:.85rem;
  text-transform:uppercase;letter-spacing:.12em;
  display:block;margin-bottom:10px;
}
.etape h3{font-size:1.05rem;margin-bottom:8px}
.etape p{font-size:.93rem;color:var(--encre-2)}

/* ---------- Zone ---------- */
.zone-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.zone-liste{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:10px 24px;margin-top:22px}
.zone-liste li{
  padding-left:26px;position:relative;font-weight:500;
}
.zone-liste li::before{
  content:"✓";position:absolute;left:0;
  color:var(--glacier);font-weight:800;
}

/* ---------- CTA ---------- */
.cta{
  background:linear-gradient(120deg,var(--glacier) 0%,var(--glacier-fonce) 100%);
  color:#fff;border-radius:calc(var(--radius) + 6px);
  padding:56px 48px;
  display:grid;grid-template-columns:1.2fr .8fr;gap:32px;align-items:center;
}
.cta h2{color:#fff}
.cta p{opacity:.9;margin-top:12px}
.cta-actions{display:flex;flex-direction:column;gap:14px;align-items:flex-start}
.cta-tel{
  font-family:var(--font-display);font-weight:800;
  font-size:1.5rem;color:#fff;text-decoration:none;letter-spacing:.01em;
}

/* ---------- Formulaire ---------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-grid .full{grid-column:1/-1}
label{font-weight:600;font-size:.92rem;display:block;margin-bottom:6px}
input,select,textarea{
  width:100%;
  font-family:var(--font-body);font-size:1rem;
  padding:12px 14px;
  border:1px solid var(--trait);border-radius:10px;
  background:#fff;color:var(--encre);
}
input:focus,select:focus,textarea:focus{
  outline:2px solid var(--glacier);outline-offset:1px;border-color:var(--glacier);
}
textarea{min-height:120px;resize:vertical}
.form-note{font-size:.85rem;color:var(--encre-2);margin-top:12px}

/* ---------- Blog ---------- */
.blog-hero{padding:64px 0 20px}
.blog-grille{
  display:grid;grid-template-columns:repeat(3,1fr);gap:22px;
  padding-bottom:80px;
}
.blog-carte{
  background:var(--papier);border:1px solid var(--trait);
  border-radius:var(--radius);padding:26px;
  display:flex;flex-direction:column;gap:12px;
  text-decoration:none;color:var(--encre);
  transition:transform .18s ease,box-shadow .18s ease;
}
.blog-carte:hover{
  transform:translateY(-3px);
  box-shadow:0 12px 32px rgba(12,74,115,.12);
}
.blog-carte h3{font-size:1.08rem}
.blog-carte p{color:var(--encre-2);font-size:.93rem;flex:1}
.blog-tag{
  align-self:flex-start;
  font-family:var(--font-display);font-weight:700;
  font-size:.72rem;text-transform:uppercase;letter-spacing:.12em;
  color:var(--glacier);background:var(--ciel);
  padding:4px 10px;border-radius:99px;
}
.blog-lire{font-weight:700;color:var(--glacier);font-size:.9rem}

/* ---------- Article ---------- */
.article{
  max-width:960px;margin:0 auto;
  padding:64px 24px 80px;
}
.article-tete{margin-bottom:36px}
.article-tete h1{font-size:clamp(1.8rem,3.6vw,2.6rem);margin-top:14px}
.article-meta{color:var(--encre-2);font-size:.9rem;margin-top:12px}
.article h2{margin:38px 0 14px}
.article p{margin-bottom:18px;color:#22364a}
.article ul,.article ol{margin:0 0 18px 24px;color:#22364a}
.article li{margin-bottom:8px}
.article strong{color:var(--encre)}
.encart{
  background:var(--ciel-2);border-left:4px solid var(--glacier);
  border-radius:0 10px 10px 0;
  padding:18px 22px;margin:26px 0;
}
.img-info{
  height:auto;
  max-width:760px;
  margin-left:auto;margin-right:auto;
}
.img-doc{
  width:100%;height:auto;border-radius:var(--radius);
  margin:26px 0;
  box-shadow:0 10px 30px rgba(12,74,115,.12);
}
.encart p{margin:0}
.article-cta{
  margin-top:48px;background:var(--glacier);color:#fff;
  border-radius:var(--radius);padding:32px;text-align:center;
}
.article-cta h3{color:#fff;margin-bottom:8px}
.article-cta p{color:rgba(255,255,255,.85);margin-bottom:18px}
.retour-blog{
  display:inline-block;margin-bottom:8px;
  font-weight:600;font-size:.9rem;text-decoration:none;
}

/* ---------- Footer ---------- */
.footer{
  background:var(--encre);color:#B9C9D6;
  padding:52px 0 32px;margin-top:0;
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;
  padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.12);
}
.footer h4{
  font-family:var(--font-display);color:#fff;
  font-size:.95rem;margin-bottom:14px;
}
.footer a{color:#B9C9D6;text-decoration:none;font-size:.93rem}
.footer a:hover{color:#fff}
.footer ul{list-style:none}
.footer li{margin-bottom:9px}
.footer-bas{
  padding-top:24px;font-size:.85rem;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer .logo{color:#fff;margin-bottom:12px}

/* ---------- Responsive ---------- */
@media(max-width:960px){
  .hero-grid,.zone-grid,.cta{grid-template-columns:1fr}
  .cartes,.blog-grille{grid-template-columns:1fr 1fr}
  .etapes{grid-template-columns:1fr 1fr}
  .bande-chiffres .wrap{grid-template-columns:1fr 1fr;gap:28px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .nav-lien{display:none}
}
@media(max-width:620px){
  .cartes,.blog-grille,.etapes,.form-grid{grid-template-columns:1fr}
  .form-grid .full{grid-column:auto}
  .hero{padding-top:48px}
  .section{padding:56px 0}
  .cta{padding:36px 26px}
  .bande-chiffres .wrap{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr}
}

/* ---------- Menu mobile ---------- */
.nav-toggle{display:none}
.burger{display:none;cursor:pointer;flex-direction:column;gap:5px;padding:10px;margin-left:auto}
.burger span{display:block;width:25px;height:3px;background:var(--encre);border-radius:2px;transition:.25s}
@media (max-width:1020px){
  .burger{display:flex}
  .nav{
    display:none;position:absolute;top:100%;left:0;right:0;
    background:#fff;flex-direction:column;align-items:stretch;gap:0;
    padding:8px 22px 20px;border-bottom:1px solid var(--trait);
    box-shadow:0 16px 32px rgba(12,74,115,.14);
  }
  .nav-toggle:checked ~ .nav{display:flex}
  .nav a{padding:13px 0;font-size:1rem;border-bottom:1px solid var(--trait)}
  .nav .nav-lien{display:block}
  .nav-tel{border-bottom:1px solid var(--trait)}
  .nav .btn{margin-top:14px;text-align:center;border-bottom:none;padding:13px 18px}
  .nav-toggle:checked + .burger span:nth-child(1){transform:translateY(8px) rotate(45deg)}
  .nav-toggle:checked + .burger span:nth-child(2){opacity:0}
  .nav-toggle:checked + .burger span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}
}