/* BackProp – feuille de style du site vitrine */
:root{
  --blue:#008ED6; --blue-dark:#0070AB; --beige:#CEC2AB; --beige-light:#F4F0E7; --dark:#151515;
  --ink:#1c1c1c; --muted:#5b5b5b; --line:#e6e1d6; --bg:#ffffff; --bg-alt:#faf8f3;
  --radius:14px; --wrap:1140px;
  --font:"Segoe UI",Inter,system-ui,-apple-system,Roboto,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.6;font-size:17px}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue-dark);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.2;color:var(--dark);margin:0 0 .5em;font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(1.9rem,4vw,2.9rem)}
h2{font-size:clamp(1.4rem,2.6vw,1.9rem)}
h3{font-size:1.15rem}
p{margin:0 0 1em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.center{text-align:center}
.small{font-size:.9rem;color:var(--muted)}
.btn{display:inline-block;background:var(--blue);color:#fff;font-weight:600;padding:.75rem 1.4rem;border-radius:999px;border:2px solid var(--blue);cursor:pointer;font-size:1rem;font-family:inherit;transition:background .15s,color .15s}
.btn:hover{background:var(--blue-dark);border-color:var(--blue-dark);text-decoration:none;color:#fff}
.btn.ghost{background:transparent;color:var(--blue-dark)}
.btn.ghost:hover{background:var(--blue);color:#fff}
.btn.small{padding:.5rem 1.05rem;font-size:.92rem}
.actions .btn{margin:.25rem .5rem .25rem 0}

/* ---------- header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;min-height:68px;gap:1rem}
.brand{display:flex;align-items:center;gap:.55rem;color:var(--dark);font-size:1.3rem;font-weight:500;letter-spacing:.01em}
.brand img{color:var(--blue)}
.brand b{color:var(--blue);font-weight:800}
.brand:hover{text-decoration:none}
.nav ul{list-style:none;margin:0;padding:0;display:flex;align-items:center;gap:.2rem}
.nav li{position:relative}
.nav a{display:block;padding:.6rem .75rem;color:var(--dark);font-weight:500;border-radius:8px}
.nav a:hover,.nav a.on{color:var(--blue-dark);text-decoration:none;background:var(--beige-light)}
.nav .cta a{margin-left:.5rem}
.nav .cta a.btn{color:#fff;background:var(--blue)}
.nav .cta a.btn:hover{background:var(--blue-dark)}
.sub{display:none;position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 14px 40px rgba(0,0,0,.09);padding:.9rem 1rem;min-width:240px;z-index:60}
.sub.two{display:none;grid-template-columns:1fr 1fr;min-width:520px;gap:1.5rem}
.has-sub:hover>.sub,.has-sub:focus-within>.sub{display:block}
.has-sub:hover>.sub.two,.has-sub:focus-within>.sub.two{display:grid}
.sub h4{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:.3rem .75rem .4rem}
.sub ul{display:block}
.sub a{padding:.45rem .75rem;font-weight:500;white-space:nowrap}
.nav-toggle,.burger{display:none}

/* ---------- hero */
.hero{background:linear-gradient(135deg,var(--beige-light) 0%,#fff 60%);border-bottom:1px solid var(--line);padding:3.2rem 0 2.8rem}
.hero.home{padding:5rem 0 4.5rem;background:radial-gradient(1200px 500px at 85% -10%,rgba(0,142,214,.14),transparent 60%),linear-gradient(135deg,var(--beige-light),#fff 70%)}
.hero.home .wrap{max-width:900px}
.hero h1 em{font-style:normal;color:var(--blue)}
.kicker{text-transform:uppercase;letter-spacing:.12em;font-size:.78rem;font-weight:700;color:var(--blue-dark);margin-bottom:1rem}
.lead{font-size:1.15rem;color:var(--muted);max-width:760px}
.hero.inner h1{max-width:900px}
.crumbs{font-size:.85rem;color:var(--muted);margin-bottom:1rem}
.crumbs a{color:var(--muted)}
.crumbs span{margin:0 .1rem}

/* ---------- sections */
.block{padding:3.2rem 0}
.block>h2{margin-bottom:.4rem}
.intro{color:var(--muted);max-width:760px;margin-bottom:1.6rem}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.1rem;margin:1.2rem 0}
.cards.three{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.4rem 1.5rem;box-shadow:0 2px 10px rgba(21,21,21,.03)}
.card.link{color:var(--ink);display:flex;flex-direction:column;transition:transform .15s,box-shadow .15s,border-color .15s}
.card.link:hover{text-decoration:none;transform:translateY(-3px);box-shadow:0 12px 28px rgba(21,21,21,.08);border-color:var(--blue)}
.card.link h3{color:var(--blue-dark)}
.card.link p{flex:1;color:var(--muted);font-size:.97rem}
.card .more{font-weight:600;color:var(--blue-dark);font-size:.95rem}
.card.wide{display:flex;align-items:center;justify-content:space-between;gap:2rem;background:var(--dark);color:#fff;border:0;padding:2rem 2.2rem}
.card.wide h2{color:#fff}
.card.wide p{margin:0;color:#d8d8d8}
.band{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:3.2rem 0}
.split{display:grid;grid-template-columns:1.2fr .8fr;gap:3rem;align-items:start}
.facts{list-style:none;margin:0;padding:0;display:grid;gap:1rem}
.facts li{background:#fff;border-left:4px solid var(--blue);border-radius:10px;padding:1rem 1.2rem;box-shadow:0 2px 10px rgba(21,21,21,.04)}
.facts b{display:block;color:var(--dark)}
.facts span{color:var(--muted);font-size:.95rem}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem;margin:1.4rem 0}
.steps>div{background:var(--bg-alt);border-radius:var(--radius);padding:1.2rem 1.3rem;border:1px solid var(--line)}
.steps b{color:var(--blue-dark);display:block;margin-bottom:.3rem}
.steps p{margin:0;font-size:.95rem;color:var(--muted)}
.clients{background:var(--dark);color:#fff;padding:2.6rem 0}
.clients h2{color:var(--beige);font-size:.85rem;text-transform:uppercase;letter-spacing:.14em;text-align:center;margin-bottom:1.4rem;font-weight:600}
.clients ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;justify-content:center;gap:.6rem .9rem}
.clients li{border:1px solid rgba(206,194,171,.35);border-radius:999px;padding:.45rem 1rem;font-size:.95rem;color:#f2eee5;white-space:nowrap}
.contact-strip{text-align:center}
.contact-strip .intro{margin:0 auto 1.4rem}

/* ---------- article */
.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:3rem;padding:2.8rem 20px 3.5rem}
.prose{max-width:760px;font-size:1.04rem}
.prose.narrow{max-width:760px;padding:2.5rem 0}
.prose h2{margin-top:2.1rem;padding-top:.4rem;font-size:1.45rem}
.prose h3{margin-top:1.6rem}
.prose ul{padding-left:1.3rem;margin:0 0 1.2em}
.prose li{margin:.3em 0}
.prose li::marker{color:var(--blue)}
.prose strong{color:var(--dark)}
.prose .btn{margin-top:.6rem}
.side{display:flex;flex-direction:column;gap:1.2rem;position:sticky;top:90px;align-self:start}
.side .card h3{margin-bottom:.5rem}
.side .card p{font-size:.97rem;color:var(--muted)}
.links{list-style:none;margin:0;padding:0}
.links li{padding:.35rem 0;border-bottom:1px solid var(--line)}
.links li:last-child{border:0}
.links.plain li{padding:.5rem 0}
.person{display:grid;grid-template-columns:160px 1fr;gap:1.6rem;align-items:start;margin:2rem 0;padding:1.6rem;background:var(--bg-alt);border-radius:var(--radius);border:1px solid var(--line)}
.person img{border-radius:50%;width:160px;height:160px;object-fit:cover}
.person h2{margin-top:0;padding-top:0}

/* ---------- formulaire */
.form .row{display:flex;flex-direction:column;gap:.3rem;margin-bottom:1rem}
.form label{font-weight:600;font-size:.95rem}
.form input,.form select,.form textarea{font:inherit;padding:.7rem .85rem;border:1px solid #cfc9bc;border-radius:10px;background:#fff;color:var(--ink)}
.form input:focus,.form select:focus,.form textarea:focus{outline:2px solid var(--blue);border-color:var(--blue)}
.form .hp{position:absolute;left:-9999px;top:-9999px;height:0;overflow:hidden}
.notice{background:#e8f6ee;border:1px solid #9fd3b4;color:#1b5e33;padding:1rem 1.2rem;border-radius:10px;margin-bottom:1.4rem}
.notice.error{background:#fdecec;border-color:#f2b2b2;color:#8a1f1f}

/* ---------- footer */
.site-footer{background:var(--beige-light);border-top:1px solid var(--line);padding:3rem 0 1.5rem;margin-top:1rem;font-size:.95rem}
.site-footer .grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:2rem}
.site-footer h4{font-size:.8rem;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);margin-bottom:.7rem}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin:.3rem 0}
.site-footer a{color:var(--dark)}
.site-footer p{color:var(--muted)}
.site-footer .legal{display:flex;gap:1.5rem;margin-top:2.2rem;padding-top:1.2rem;border-top:1px solid var(--line);color:var(--muted);font-size:.88rem}

/* ---------- responsive */
@media (max-width:980px){
  .split,.site-footer .grid{grid-template-columns:1fr 1fr}
  .article-grid{grid-template-columns:1fr}
  .side{position:static}
}
@media (max-width:820px){
  .burger{display:flex;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;cursor:pointer;padding:9px}
  .burger span{display:block;height:2px;background:var(--dark);border-radius:2px}
  .nav{display:none;position:absolute;left:0;right:0;top:68px;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 20px 40px rgba(0,0,0,.08);max-height:calc(100vh - 68px);overflow:auto}
  .nav-toggle:checked~.nav{display:block}
  .nav ul{flex-direction:column;align-items:stretch;padding:.6rem 12px 1rem;gap:0}
  .nav a{padding:.75rem .6rem}
  .sub,.sub.two{display:block;position:static;border:0;box-shadow:none;padding:0 0 .4rem 1rem;min-width:0;grid-template-columns:1fr}
  .sub.two{display:block}
  .sub h4{margin:.5rem .6rem .2rem}
  .nav .cta a{margin:.6rem 0 0}
  .card.wide{flex-direction:column;align-items:flex-start}
  .person{grid-template-columns:1fr}
  .person img{width:120px;height:120px}
  .hero.home{padding:3.2rem 0 3rem}
}
@media (max-width:560px){
  .split,.site-footer .grid{grid-template-columns:1fr}
  body{font-size:16px}
  .block{padding:2.4rem 0}
}