/* ===== RKH Réseaux — feuille de style partagée (pages de service) ===== */
:root{
  --navy:#0b2c5c; --navy-2:#0f3a78; --blue:#1565d8; --cyan:#22d3ee;
  --ink:#0f172a; --slate:#475569; --muted:#64748b; --line:#e2e8f0;
  --bg:#f7f9fc; --white:#fff; --radius:16px;
  --shadow:0 10px 30px -12px rgba(11,44,92,.25);
  --shadow-lg:0 30px 60px -20px rgba(11,44,92,.35);
  --container:1100px;
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased;font-variant-numeric:lining-nums}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
section{padding:clamp(46px,7vw,86px) 0}
h1,h2,h3{line-height:1.15;letter-spacing:-.02em;font-weight:800;color:var(--navy)}
h2{font-size:clamp(1.55rem,3.2vw,2.3rem);margin-bottom:8px}
h3{font-size:1.2rem}
p{color:var(--slate)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.78rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--blue);background:#e8f0fe;padding:7px 14px;border-radius:999px;margin-bottom:16px}
.lead{font-size:clamp(1rem,1.5vw,1.15rem);color:var(--slate)}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-weight:700;font-size:1rem;line-height:1;padding:14px 24px;border-radius:12px;border:2px solid transparent;cursor:pointer;transition:.2s;white-space:nowrap}
.btn-primary{background:#2f7bf0;color:#fff;box-shadow:0 6px 16px -6px rgba(11,44,92,.22)}
.btn-primary:hover{transform:translateY(-2px)}
.btn-light{background:#fff;color:var(--navy);box-shadow:var(--shadow)}
.btn-light:hover{transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.35)}
.btn-ghost:hover{background:rgba(255,255,255,.22)}

/* Header */
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{display:flex;align-items:center;gap:11px;font-weight:900;font-size:1.2rem;color:var(--navy)}
.logo .mark{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,#3b82f6,#1565d8);display:grid;place-items:center;box-shadow:var(--shadow)}
.logo small{display:block;font-size:.6rem;font-weight:600;letter-spacing:.18em;color:var(--muted);text-transform:uppercase}
.nav-links{display:flex;align-items:center;gap:26px;list-style:none}
.nav-links a{font-weight:600;font-size:.94rem;color:var(--slate)}
.nav-links a:hover{color:var(--blue)}
.nav-cta{display:flex;align-items:center;gap:14px}
.nav-phone{display:flex;align-items:center;gap:8px;font-weight:800;color:var(--navy);line-height:1;font-variant-numeric:tabular-nums lining-nums;white-space:nowrap}
.nav-phone svg{display:block;flex-shrink:0}
.burger{display:none;background:none;border:none;cursor:pointer;padding:8px}
.burger span{display:block;width:26px;height:3px;background:var(--navy);border-radius:3px;margin:5px 0;transition:.3s}

/* Breadcrumb */
.crumb{font-size:.85rem;color:var(--muted);padding:16px 0 0}
.crumb a{color:var(--blue);font-weight:600}
.crumb span{margin:0 6px}

/* Hero (page de service) */
.hero-sub{background:linear-gradient(160deg,var(--navy) 0%,var(--navy-2) 55%,#134a95 100%);color:#fff;position:relative;overflow:hidden;padding:clamp(38px,5vw,64px) 0 clamp(46px,6vw,72px)}
.hero-sub::before{content:"";position:absolute;inset:0;background-image:radial-gradient(circle at 85% 10%,rgba(34,211,238,.22),transparent 42%),radial-gradient(circle at 5% 95%,rgba(59,130,246,.22),transparent 45%)}
.hero-sub .container{position:relative}
.hero-sub .eyebrow{background:rgba(255,255,255,.12);color:#bfe0ff}
.hero-sub h1{color:#fff;font-size:clamp(1.9rem,4.4vw,3rem);font-weight:900;max-width:820px}
.hero-sub h1 .grad{background:linear-gradient(120deg,#7dd3fc,#22d3ee);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-sub p{color:#c7d7ee;font-size:clamp(1rem,1.5vw,1.18rem);margin:18px 0 26px;max-width:640px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}

/* Contenu / prose */
.prose{max-width:800px}
.prose h2{margin-top:38px}
.prose h2:first-child{margin-top:0}
.prose p{margin-top:12px}
.prose ul{margin:14px 0 0 4px;list-style:none;display:grid;gap:10px}
.prose li{padding-left:30px;position:relative;color:var(--slate)}
.prose li::before{content:"";position:absolute;left:0;top:2px;width:20px;height:20px;background:#e8f0fe;border-radius:6px}
.prose li::after{content:"✓";position:absolute;left:4px;top:1px;color:var(--blue);font-weight:800;font-size:.8rem}
.split{display:grid;grid-template-columns:1fr 320px;gap:40px;align-items:start}
.aside-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);position:sticky;top:90px}
.aside-card h3{margin-bottom:10px}
.aside-card .line{display:flex;gap:10px;align-items:center;margin:12px 0;color:var(--slate);font-size:.94rem}
.aside-card .line svg{color:var(--blue);flex-shrink:0}
.aside-card .btn{width:100%;margin-top:8px}

/* Cartes services liées */
.mini-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:24px}
.mini{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;transition:.2s}
.mini:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.mini b{color:var(--navy);display:block;margin-bottom:4px}
.mini span{color:var(--muted);font-size:.9rem}

/* Blog / conseils */
.posts{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:26px}
.post{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.2s;display:block}
.post:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.post .tag{font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--blue)}
.post h3{margin:8px 0}
.post p{color:var(--slate);font-size:.94rem}
.post .more{margin-top:12px;color:var(--blue);font-weight:700;font-size:.9rem;display:inline-block}
.article{max-width:760px}
.article p{margin-top:14px}
.article h2{margin-top:32px}
.article .meta{color:var(--muted);font-size:.88rem;margin-bottom:6px}
@media(max-width:640px){.posts{grid-template-columns:1fr}}

/* FAQ */
.faq{max-width:800px;margin-top:22px}
.qa{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:12px;overflow:hidden}
.qa summary{list-style:none;cursor:pointer;padding:20px 22px;font-weight:700;color:var(--navy);display:flex;justify-content:space-between;gap:16px;font-size:1.02rem}
.qa summary::-webkit-details-marker{display:none}
.qa .plus{width:26px;height:26px;flex-shrink:0;border-radius:7px;background:#e8f0fe;color:var(--blue);display:grid;place-items:center;font-size:1.2rem;transition:.3s}
.qa[open] .plus{transform:rotate(45deg);background:var(--blue);color:#fff}
.qa .ans{padding:0 22px 20px;color:var(--slate)}

/* Bande CTA */
.band{background:linear-gradient(160deg,var(--navy),var(--navy-2));color:#fff;border-radius:24px;padding:clamp(30px,4vw,50px);text-align:center;overflow:hidden;position:relative}
.band::after{content:"";position:absolute;top:-40%;right:-8%;width:340px;height:340px;background:radial-gradient(circle,rgba(34,211,238,.22),transparent 65%)}
.band h2{color:#fff;position:relative}
.band p{color:#c7d7ee;margin:12px auto 24px;max-width:560px;position:relative}
.band .hero-actions{justify-content:center;position:relative}

/* Footer */
footer{background:#061a38;color:#93a9c9;padding:54px 0 24px;margin-top:20px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px;margin-bottom:36px}
footer h4{color:#fff;font-size:1rem;margin-bottom:14px}
footer ul{list-style:none}
footer li{margin-bottom:9px;font-size:.92rem}
footer a:hover{color:#fff}
.foot-logo{display:flex;align-items:center;gap:11px;font-weight:900;font-size:1.15rem;color:#fff;margin-bottom:14px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:.85rem}
.foot-bottom a{color:#93a9c9}

/* Barre d'appel mobile */
.floating-call{display:none}

/* Bouton WhatsApp flottant */
.wa-btn{position:fixed;right:20px;bottom:20px;z-index:70;width:56px;height:56px;border-radius:50%;background:#25d366;display:grid;place-items:center;box-shadow:0 10px 26px -6px rgba(0,0,0,.35);transition:.2s}
.wa-btn:hover{transform:scale(1.07)}
.wa-btn svg{width:32px;height:32px}

@media(max-width:1090px){
  .nav-links{position:fixed;inset:64px 0 auto 0;background:#fff;flex-direction:column;padding:20px;gap:6px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);transform:translateY(-160%);transition:.35s;align-items:stretch}
  .nav-links.open{transform:translateY(0)}
  .nav-links a{padding:12px 6px;border-radius:10px}
  .burger{display:block}
  .nav{height:64px}
}
@media(max-width:900px){
  .split{grid-template-columns:1fr}
  .aside-card{position:static}
  .mini-grid{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .nav-links{position:fixed;inset:70px 0 auto 0;background:#fff;flex-direction:column;padding:20px;gap:6px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);transform:translateY(-160%);transition:.35s;align-items:stretch}
  .nav-links.open{transform:translateY(0)}
  .nav-links a{padding:12px 6px;border-radius:10px}
  .nav .nav-phone,.nav-cta .btn-primary{display:none}
  .burger{display:block}
  .mini-grid,.foot-grid{grid-template-columns:1fr}
  .floating-call{display:flex;position:fixed;bottom:14px;left:14px;right:14px;z-index:60;gap:10px}
  .floating-call .btn{flex:1;box-shadow:var(--shadow-lg)}
  body{padding-bottom:78px}
  .wa-btn{bottom:90px;width:52px;height:52px}
  .wa-btn svg{width:29px;height:29px}
  .foot-bottom{flex-direction:column}
}