:root{
  --navy:#0a1a4f; --navy2:#0c2266; --blue:#1d4fd8; --sky:#5fb4ff; --ice:#e8f2ff;
  --ink:#0d1530; --muted:#55607a; --line:#dbe4f3; --gold:#ffcc33; --white:#fff;
  --r:14px; --shadow:0 10px 30px rgba(10,26,79,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Montserrat","Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);line-height:1.6;background:#fff;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue)}
.wrap{max-width:1160px;margin:0 auto;padding:0 20px}
.narrow{max-width:820px}
.center{text-align:center}
h1,h2,h3{line-height:1.2;margin:0 0 .6em;font-weight:800;letter-spacing:-.01em}
h2{font-size:clamp(1.5rem,3vw,2.1rem);color:var(--navy)}
h3{font-size:1.1rem}
svg{width:1.2em;height:1.2em;flex:none}

/* header */
.top{position:sticky;top:0;z-index:50;background:rgba(10,26,79,.96);backdrop-filter:blur(8px);color:#fff}
.top-in{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-size:1.1rem;font-weight:600;white-space:nowrap}
.brand b{color:var(--sky)}
.brand img{width:44px;height:44px}
.nav{display:flex;gap:18px;margin-left:auto}
.nav a{color:#cfe0ff;text-decoration:none;font-size:.92rem;font-weight:600}
.nav a:hover{color:#fff}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:.55em;padding:.95em 1.4em;border-radius:999px;font-weight:800;text-decoration:none;border:0;cursor:pointer;font-size:1rem;font-family:inherit;transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translateY(-1px)}
.btn-call{background:var(--gold);color:#0a1a4f;box-shadow:0 6px 18px rgba(255,204,51,.35)}
.btn-main{background:var(--blue);color:#fff;box-shadow:0 6px 18px rgba(29,79,216,.35)}
.btn-ghost{background:rgba(255,255,255,.1);color:#fff;border:1.5px solid rgba(255,255,255,.45)}
.btn.sm{padding:.6em 1em;font-size:.92rem}

/* hero */
.hero{background:radial-gradient(1200px 600px at 80% 20%,#2a5fd6 0%,transparent 60%),linear-gradient(160deg,#0a1a4f 0%,#0f2b86 60%,#0a1a4f 100%);color:#fff;padding:56px 0 64px;overflow:hidden}
.hero-in{display:grid;grid-template-columns:1.25fr .75fr;gap:40px;align-items:center}
.hero h1{font-size:clamp(1.9rem,4.6vw,3.2rem);text-transform:uppercase;font-weight:900;margin-bottom:.4em}
.hero h1 span{display:block;color:var(--sky);font-size:.55em;letter-spacing:.01em;margin-top:.35em}
.lead{font-size:1.12rem;color:#d7e5ff;max-width:640px}
.badge{display:inline-block;border:1.5px solid var(--sky);color:#fff;background:rgba(29,79,216,.5);border-radius:999px;padding:.35em 1em;font-weight:800;font-size:.82rem;letter-spacing:.04em;text-transform:uppercase;margin-bottom:18px}
.ctas{display:flex;flex-wrap:wrap;gap:12px;margin:26px 0 18px}
.trust{display:flex;flex-wrap:wrap;gap:8px 22px;list-style:none;padding:0;margin:0;color:#bcd3ff;font-weight:600;font-size:.92rem}
.trust li::before{content:"✓ ";color:var(--sky);font-weight:900}
.hero-logo img{width:100%;max-width:380px;margin:auto;filter:drop-shadow(0 20px 40px rgba(0,0,0,.45))}
.crumbs{font-size:.85rem;color:#a9c3f5;margin-bottom:14px}
.crumbs a{color:#d7e5ff}

/* sections */
.sec{padding:64px 0}
.sec.alt{background:var(--ice)}
.sec-lead{color:var(--muted);max-width:720px;margin:-.2em 0 28px;font-size:1.05rem}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px}
.card{display:block;background:#fff;border:1px solid var(--line);border-left:4px solid var(--sky);border-radius:var(--r);padding:22px;text-decoration:none;color:var(--ink);box-shadow:var(--shadow);transition:transform .15s,border-color .15s}
.card:hover{transform:translateY(-3px);border-left-color:var(--blue)}
.card svg{width:34px;height:34px;color:var(--blue);margin-bottom:10px}
.card h3{color:var(--navy);text-transform:uppercase;font-size:1rem}
.card p{color:var(--muted);font-size:.94rem;margin:0 0 10px}
.more{color:var(--blue);font-weight:800;font-size:.9rem}
.checks{list-style:none;padding:0;margin:0 0 1em}
.checks li{padding-left:1.7em;position:relative;margin:.45em 0}
.checks li::before{content:"";position:absolute;left:0;top:.45em;width:.85em;height:.85em;border-radius:50%;background:var(--sky);box-shadow:0 0 0 3px rgba(95,180,255,.25)}
.checks.big li{margin:.8em 0}
.why{display:grid;grid-template-columns:1.2fr .8fr;gap:40px}
.steps{background:linear-gradient(160deg,#0a1a4f,#0f2b86);color:#fff;border-radius:var(--r);padding:28px}
.steps h3{color:var(--sky);text-transform:uppercase}
.steps ol{margin:0;padding-left:1.2em}
.steps li{margin:.7em 0;color:#d7e5ff}
.steps b{color:#fff}
.two{display:grid;grid-template-columns:1.4fr .6fr;gap:40px;align-items:start}
.prose p{font-size:1.04rem}
.side{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px;box-shadow:var(--shadow);position:sticky;top:90px}
.side h3{color:var(--navy)}
.links{list-style:none;padding:0;margin:0}
.links li{border-bottom:1px solid var(--line)}
.links a{display:block;padding:.55em 0;text-decoration:none;font-weight:600}
.cities{display:flex;flex-wrap:wrap;gap:10px;list-style:none;padding:0;margin:0}
.cities a{display:inline-block;background:#fff;border:1.5px solid var(--line);border-radius:999px;padding:.45em 1em;text-decoration:none;color:var(--navy);font-weight:700;font-size:.93rem}
.cities a:hover{border-color:var(--blue);color:var(--blue)}
.cities small{color:var(--muted);font-weight:600}

/* faq */
.faq details{border:1px solid var(--line);border-radius:12px;padding:0 18px;margin:10px 0;background:#fff}
.faq summary{cursor:pointer;font-weight:800;padding:16px 0;color:var(--navy);list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--blue);font-size:1.3em;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq p{margin:0 0 16px;color:var(--muted)}

/* form */
.devis{background:linear-gradient(160deg,#0a1a4f,#0f2b86);color:#fff;padding:64px 0}
.devis-in{display:grid;grid-template-columns:.9fr 1.1fr;gap:40px;align-items:start}
.devis h2{color:#fff}
.devis-txt p{color:#d7e5ff}
.devis-or a{color:var(--gold);font-weight:800}
.devis .checks li{color:#d7e5ff}
.form{background:#fff;color:var(--ink);border-radius:var(--r);padding:26px;display:grid;gap:14px;box-shadow:0 20px 50px rgba(0,0,0,.3)}
.form label{display:grid;gap:6px;font-weight:700;font-size:.9rem;color:var(--navy)}
.form input,.form select,.form textarea{font:inherit;font-weight:500;padding:.8em .9em;border:1.5px solid var(--line);border-radius:10px;width:100%;background:#f8fbff}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--blue);background:#fff}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.hp{position:absolute;left:-9999px}

/* footer */
.foot{background:#071238;color:#a9b8da;padding:50px 0 90px;font-size:.93rem}
.foot-grid{display:grid;grid-template-columns:1fr 1fr 1.4fr;gap:30px}
.foot h3{color:#fff;text-transform:uppercase;font-size:.9rem}
.foot ul{list-style:none;padding:0;margin:0}
.foot li{margin:.35em 0}
.foot a{color:#cfe0ff;text-decoration:none}
.foot a:hover{color:#fff}
.foot-cities ul{columns:2}
.foot-bottom{border-top:1px solid #1a2a5e;margin-top:30px;padding-top:18px}
.foot img{margin-bottom:10px}

/* bouton appel flottant mobile */
.fab{display:none}

@media (max-width:900px){
  .nav{display:none}
  .top-in{justify-content:space-between}
  .hero-in,.why,.two,.devis-in{grid-template-columns:1fr}
  .hero-logo{display:none}
  .hero{padding:32px 0 44px}
  .side{position:static}
  .foot-grid{grid-template-columns:1fr}
  .fab{display:flex;position:fixed;left:16px;right:16px;bottom:14px;z-index:60;justify-content:center;align-items:center;gap:.5em;background:var(--gold);color:#0a1a4f;font-weight:900;text-decoration:none;padding:1em;border-radius:999px;box-shadow:0 10px 30px rgba(0,0,0,.35);font-size:1.05rem}
}
@media (max-width:520px){
  .top .btn.sm{width:auto;padding:.7em}
  .top .btn.sm span{display:none}
  .brand span{font-size:1rem}
  .row2{grid-template-columns:1fr}
  .btn{width:100%;justify-content:center}
  .ctas{flex-direction:column}
}