/* ClimaService.fr — feuille de style du silo Pompe à chaleur
   Reprend la charte du site : fond ardoise #F1F5F9, bleu profond #0C4A6E,
   accent orange #F97316, bleu ciel #38BDF8, polices système.
   À placer dans /blog/ (lié en relatif : pac-guides.css). */

:root{
  --bg:#F1F5F9;
  --text:#334155;
  --navy:#0C4A6E;
  --navy-2:#0E5A85;
  --sky:#38BDF8;
  --orange:#F97316;
  --orange-dark:#EA580C;
  --white:#ffffff;
  --border:#E2E8F0;
  --muted:#64748B;
  --radius:14px;
  --maxw:1080px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,"system-ui","Segoe UI",Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  font-size:17px;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{color:var(--navy);line-height:1.2;font-weight:700}
h1{font-size:2.4rem;letter-spacing:-.01em}
h2{font-size:1.6rem;margin-top:2.2rem}
h3{font-size:1.2rem;margin-top:1.5rem}
p{margin-top:1rem;color:var(--text)}
a{color:var(--navy-2);text-decoration:none}
ul,ol{margin:1rem 0 1rem 1.2rem}
li{margin:.4rem 0}
strong{color:var(--navy)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:var(--navy);box-shadow:0 1px 6px rgba(0,0,0,.12)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:62px}
.logo{color:#fff;font-weight:700;font-size:1.2rem;display:flex;align-items:center;gap:.4rem}
.nav{display:flex;align-items:center;gap:1.3rem}
.nav a{color:#dbeafe;font-weight:600;font-size:.95rem}
.nav a:hover{color:#fff}
.btn{display:inline-block;background:var(--orange);color:#fff;font-weight:700;padding:.6rem 1.2rem;border-radius:10px;transition:background .15s,transform .15s;border:none;cursor:pointer;font-size:.95rem}
.btn:hover{background:var(--orange-dark);transform:translateY(-1px)}

/* Hero */
.page-hero{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff;padding:46px 0 40px}
.page-hero h1{color:#fff}
.crumb{font-size:.85rem;color:#bae6fd;margin-bottom:.9rem}
.crumb a{color:#bae6fd;text-decoration:underline}
.lead{font-size:1.12rem;margin-top:1rem;max-width:62ch;color:#e0f2fe}
.meta-row{display:flex;gap:1.3rem;flex-wrap:wrap;margin-top:1.3rem;font-size:.9rem;color:#bae6fd}

/* Content */
.content{padding:30px 0 40px}
.content .wrap{max-width:760px}
.content p,.content li{font-size:1.05rem}

/* Callouts */
.note{background:#e0f2fe;border-left:4px solid var(--sky);border-radius:10px;padding:16px 20px;margin:1.5rem 0}
.note.warn{background:#fff7ed;border-left-color:var(--orange)}
.note.ok{background:#ecfdf5;border-left-color:#10b981}
.note p{margin-top:.3rem;color:var(--navy)}
.note strong{display:block;margin-bottom:.2rem}

/* Tables */
.table-x{width:100%;border-collapse:collapse;margin:1.4rem 0;font-size:.98rem;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:0 1px 3px rgba(0,0,0,.06)}
.table-x th,.table-x td{padding:.8rem 1rem;text-align:left;border-bottom:1px solid var(--border)}
.table-x th{background:var(--navy);color:#fff;font-weight:600;font-size:.95rem}
.table-x tr:last-child td{border-bottom:none}
.table-x td:first-child{font-weight:600;color:var(--navy)}

/* Stats */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin:1.6rem 0}
.stat{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:18px;text-align:left}
.stat .n{font-weight:800;font-size:1.6rem;color:var(--orange-dark)}
.stat .l{font-size:.9rem;color:var(--muted);margin-top:.2rem}

/* FAQ */
.faq{margin:1.5rem 0}
.faq details{background:#fff;border:1px solid var(--border);border-radius:12px;padding:0 18px;margin:.6rem 0}
.faq summary{cursor:pointer;font-weight:700;padding:15px 0;list-style:none;color:var(--navy)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--orange-dark);font-size:1.3rem;line-height:1}
.faq details[open] summary::after{content:"\2212"}
.faq details p{padding-bottom:15px;margin-top:0}

/* CTA */
.cta{background:linear-gradient(135deg,var(--navy),var(--navy-2));border-radius:18px;padding:34px 26px;margin:2.4rem 0;text-align:center;color:#fff}
.cta h2{color:#fff;margin-top:0}
.cta p{color:#cfe8f5;max-width:52ch;margin:.6rem auto 1.3rem}
.cta .btn{font-size:1.05rem;padding:.85rem 1.7rem}

/* related */
.related{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin:1.5rem 0}
.related a{background:#fff;border:1px solid var(--border);border-radius:12px;padding:15px 17px;font-weight:700;color:var(--navy);display:block;transition:border-color .15s,box-shadow .15s}
.related a:hover{border-color:var(--sky);box-shadow:0 2px 8px rgba(56,189,248,.18)}
.related a span{display:block;font-weight:500;font-size:.88rem;color:var(--muted);margin-top:.25rem}

/* Footer */
.site-footer{background:var(--navy);color:#cfe2ee;margin-top:36px;padding:38px 0 26px}
.site-footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:24px}
.site-footer .logo{color:#fff}
.site-footer h4{color:#fff;font-size:1rem;margin-bottom:.6rem}
.site-footer a{color:#cfe2ee;display:block;padding:.2rem 0;font-size:.95rem}
.site-footer a:hover{color:#fff}
.site-footer .tag{font-size:.92rem;margin-top:.6rem;max-width:36ch;color:#b9d3e3}
.site-footer .legal{border-top:1px solid rgba(255,255,255,.15);margin-top:24px;padding-top:16px;font-size:.82rem;color:#9fbdd0;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

@media(max-width:760px){
  h1{font-size:1.9rem}
  h2{font-size:1.35rem}
  .nav a:not(.btn){display:none}
  .site-footer .cols{grid-template-columns:1fr 1fr}
}