:root{
  --encre:#08202E; --encre-2:#0E3145;
  --azur:#41B6E6; --cyan:#6DD5ED; --azur-profond:#0F6F97; --azur-fonce:#0B5E82;
  --papier:#F5F8FA; --ardoise:#4A5C68; --trait:#DCE6EC;
  --display:'Space Grotesk',sans-serif; --corps:'IBM Plex Sans',sans-serif; --mono:'IBM Plex Mono',monospace;
  --wrap:1140px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--corps);color:var(--ardoise);background:#fff;line-height:1.65;-webkit-font-smoothing:antialiased}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
h1,h2,h3{font-family:var(--display);color:var(--encre);line-height:1.15;letter-spacing:-.01em}
h1{font-size:clamp(2rem,4.4vw,3.35rem);font-weight:700}
h2{font-size:clamp(1.65rem,3vw,2.3rem);font-weight:700}
h3{font-size:1.15rem;font-weight:700}
a{color:var(--azur-profond)}
.eyebrow{font-family:var(--mono);font-size:.75rem;letter-spacing:.16em;text-transform:uppercase;color:var(--azur-profond)}
.eyebrow.sur-sombre{color:var(--cyan)}
:focus-visible{outline:3px solid var(--azur);outline-offset:3px;border-radius:2px}

/* ---------- Header ---------- */
header{position:fixed;top:0;left:0;right:0;z-index:50;transition:background .3s,box-shadow .3s}
header.colle{background:rgba(8,32,46,.94);backdrop-filter:blur(8px);box-shadow:0 1px 0 rgba(109,213,237,.18)}
.bar{display:flex;align-items:center;justify-content:space-between;height:76px}
.bar img{height:30px;width:auto;display:block}
nav ul{display:flex;gap:30px;list-style:none;align-items:center}
nav a{font-size:.94rem;font-weight:500;color:#D6E4EC;text-decoration:none;padding:6px 0;border-bottom:2px solid transparent;transition:.2s}
nav a:hover{color:#fff;border-bottom-color:var(--azur)}
.btn{display:inline-block;font-family:var(--corps);font-weight:600;font-size:.94rem;padding:13px 24px;border-radius:6px;text-decoration:none;border:2px solid transparent;cursor:pointer;transition:.2s}
.btn-plein{background:var(--azur-profond);color:#fff}
.btn-plein:hover{background:var(--azur-fonce)}
.btn-azur{background:var(--azur);color:var(--encre)}
.btn-azur:hover{background:var(--cyan)}
.btn-fantome{border-color:rgba(109,213,237,.5);color:#fff}
.btn-fantome:hover{border-color:var(--cyan);background:rgba(109,213,237,.1)}
.burger{display:none;background:none;border:0;cursor:pointer;padding:8px;width:44px;height:44px;flex-direction:column;justify-content:center;gap:5px}
.burger span{display:block;height:2px;width:24px;background:#fff;border-radius:2px;transition:transform .25s,opacity .25s}
.burger.ouvert span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.ouvert span:nth-child(2){opacity:0}
.burger.ouvert span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.menu-mobile{background:var(--encre);border-top:1px solid rgba(109,213,237,.18)}
.menu-mobile[hidden]{display:none}
.menu-mobile ul{list-style:none;padding:8px 24px 22px}
.menu-mobile li{border-bottom:1px solid rgba(109,213,237,.1)}
.menu-mobile li:last-child{border-bottom:0}
.menu-mobile a{display:block;padding:16px 0;color:#D6E4EC;text-decoration:none;font-weight:500;font-size:1.05rem}
.menu-mobile a:hover,.menu-mobile a:focus{color:var(--cyan)}

/* ---------- Hero ---------- */
.hero{background:var(--encre);color:#C9DCE6;padding:170px 0 0;position:relative;overflow:hidden}
.hero-grille{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero h1{color:#fff;margin:18px 0 22px}
.hero h1 em{font-style:normal;color:var(--azur)}
.hero p.chapo{font-size:1.13rem;max-width:38ch;margin-bottom:34px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.topo{width:100%;height:auto}
@media (prefers-reduced-motion:no-preference){
  .topo .lien{stroke-dasharray:220;stroke-dashoffset:220;animation:trace 1.6s cubic-bezier(.4,0,.2,1) forwards}
  .topo .noeud{opacity:0;transform-box:fill-box;transform-origin:center;animation:pop .7s cubic-bezier(.34,1.4,.64,1) forwards}
  .topo .pulse{transform-origin:center;animation:pulse 3.2s ease-in-out infinite}
}
@keyframes trace{to{stroke-dashoffset:0}}
@keyframes pop{from{opacity:0;transform:scale(.4)}to{opacity:1;transform:scale(1)}}
@keyframes pulse{0%,100%{opacity:.15;r:44}50%{opacity:.05;r:56}}

/* bandeau partenaires */
.hero-fin{height:80px}
.certifs{background:#fff;border-bottom:1px solid var(--trait);padding:34px 0}
.certifs .eyebrow{margin-bottom:20px}
.badges{display:flex;align-items:center;gap:52px;flex-wrap:wrap}
.badge-3cx{height:70px;width:auto}
.badge-forti{height:54px;width:auto}
.badge-acse{display:flex;align-items:center;gap:14px;border:1px solid var(--trait);border-left:3px solid var(--azur);border-radius:0 8px 8px 0;padding:12px 18px 12px 16px}
.acse-sigle{font-family:var(--display);font-weight:700;font-size:1.5rem;color:var(--azur-fonce);letter-spacing:.02em}
.acse-txt{font-size:.8rem;line-height:1.45;color:var(--ardoise)}
.acse-txt strong{display:block;color:var(--encre);font-weight:600}
.certifs-note{font-size:.88rem;color:var(--ardoise);margin-top:20px}

/* ---------- Sections ---------- */
section{padding:96px 0}
.entete{max-width:56ch;margin-bottom:52px}
.entete h2{margin:14px 0 16px}
.filet{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.filet span{height:1px;width:44px;background:var(--azur)}
.filet i{width:7px;height:7px;border-radius:50%;background:var(--azur);display:block}

/* Services */
#services{background:var(--papier)}
.cartes{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.carte{background:#fff;border:1px solid var(--trait);border-radius:12px;padding:32px;transition:.25s}
.carte:hover{border-color:var(--azur);transform:translateY(-3px);box-shadow:0 12px 28px -18px rgba(8,32,46,.35)}
.carte svg{color:var(--azur-profond);margin-bottom:16px}
.carte h3{margin-bottom:10px}
.carte ul{list-style:none;margin-top:14px}
.carte li{padding-left:18px;position:relative;font-size:.95rem;margin-bottom:5px}
.carte li::before{content:"";position:absolute;left:0;top:.62em;width:6px;height:6px;border-radius:50%;background:var(--azur)}
.tag{display:inline-block;margin-top:18px;font-family:var(--mono);font-size:.7rem;letter-spacing:.08em;color:var(--azur-fonce);background:#E4F4FB;border-radius:4px;padding:5px 10px}

/* Méthode */
.etapes{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--trait)}
.etape{padding:30px 26px 30px 0;border-right:1px solid var(--trait)}
.etape:last-child{border-right:0}
.etape .num{font-family:var(--mono);font-size:.8rem;color:var(--azur);font-weight:500;display:block;margin-bottom:12px}
.etape h3{font-size:1.05rem;margin-bottom:8px}
.etape p{font-size:.94rem}

/* Structure / positionnement */
#structure{background:var(--encre);color:#B9CFDB}
#structure h2{color:#fff}
.struct{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.struct p{font-size:1.05rem;margin-bottom:18px}
.struct .fort{color:var(--cyan);font-weight:500}
.piliers{list-style:none;display:grid;gap:2px}
.piliers li{background:var(--encre-2);border-left:3px solid var(--azur);padding:18px 22px;font-size:.97rem;color:#D2E4EC}
.piliers strong{color:#fff;font-family:var(--display);display:block;margin-bottom:2px}

/* Références */
.refs{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.ref{border:1px solid var(--trait);border-left:3px solid var(--azur);border-radius:0 12px 12px 0;padding:28px}
.ref .secteur{font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--azur-profond);display:block;margin-bottom:10px}
.ref h3{font-size:1.02rem;margin-bottom:8px}
.ref p{font-size:.94rem}
.apreciser{background:#FFF8E6;border:1px dashed #D9A93C;border-radius:8px;padding:14px 18px;margin-top:28px;font-size:.9rem;color:#7A5A10}

/* Contact */
#contact{background:var(--papier)}
.contact-grille{display:grid;grid-template-columns:.85fr 1.15fr;gap:56px}
.coord{list-style:none}
.coord li{display:flex;gap:14px;margin-bottom:22px;align-items:flex-start}
.coord svg{color:var(--azur-profond);flex-shrink:0;margin-top:3px}
.coord strong{display:block;color:var(--encre);font-family:var(--display)}
form{background:#fff;border:1px solid var(--trait);border-radius:12px;padding:34px}
.champs{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.champ{display:flex;flex-direction:column}
.champ.large{grid-column:1/-1}
label{font-size:.85rem;font-weight:600;color:var(--encre);margin-bottom:6px}
input,textarea,select{font-family:var(--corps);font-size:.97rem;padding:12px 14px;border:1px solid var(--trait);border-radius:6px;background:#fff;color:var(--encre)}
input:focus,textarea:focus,select:focus{border-color:var(--azur);outline:none;box-shadow:0 0 0 3px rgba(65,182,230,.2)}
textarea{resize:vertical;min-height:120px}
.rgpd{grid-column:1/-1;display:flex;gap:10px;align-items:flex-start;font-size:.83rem;line-height:1.5}
.rgpd input{width:auto;margin-top:3px}
form .btn{grid-column:1/-1;justify-self:start;margin-top:6px}

/* Footer */
footer{background:var(--encre);color:#8FAEBE;padding:60px 0 30px;font-size:.9rem}
footer img{height:26px;margin-bottom:18px}
.foot-grille{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:34px;border-bottom:1px solid rgba(109,213,237,.14)}
footer h4{font-family:var(--display);color:#fff;font-size:.95rem;margin-bottom:14px}
footer ul{list-style:none}
footer li{margin-bottom:8px}
footer a{color:#8FAEBE;text-decoration:none}
footer a:hover{color:var(--cyan)}
.foot-bas{padding-top:22px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.83rem}

@media(max-width:900px){
  .hero-grille,.struct,.contact-grille{grid-template-columns:1fr}
  .hero{padding-top:120px}
  .topo{max-width:440px;margin:0 auto}
  .cartes,.refs,.etapes,.foot-grille{grid-template-columns:1fr}
  .etape{border-right:0;border-bottom:1px solid var(--trait);padding-right:0}
  nav ul{display:none}
  .burger{display:block}
  header{background:rgba(8,32,46,.94)}
  .champs{grid-template-columns:1fr}
}

/* ---------- Pages internes (légales, merci) ---------- */
.page-interne{padding:150px 0 90px}
.page-interne .wrap{max-width:780px}
.page-interne h1{font-size:clamp(1.9rem,3.6vw,2.6rem);margin-bottom:10px}
.page-interne .maj{font-family:var(--mono);font-size:.78rem;color:var(--ardoise);margin-bottom:44px}
.page-interne h2{font-size:1.35rem;margin:40px 0 14px}
.page-interne h3{font-size:1.05rem;margin:26px 0 8px}
.page-interne p,.page-interne li{margin-bottom:12px}
.page-interne ul{padding-left:22px}
.page-interne dl{border-top:1px solid var(--trait)}
.page-interne dt{font-weight:600;color:var(--encre);padding-top:14px;font-size:.9rem}
.page-interne dd{padding-bottom:14px;border-bottom:1px solid var(--trait)}
.page-interne table{width:100%;border-collapse:collapse;margin:16px 0}
.page-interne th,.page-interne td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--trait);font-size:.93rem;vertical-align:top}
.page-interne th{color:var(--encre);font-weight:600;background:var(--papier)}
.retour{display:inline-block;margin-top:40px;font-weight:600;text-decoration:none}
.confirm{text-align:center;padding:190px 0 120px}
.confirm .coche{width:64px;height:64px;margin:0 auto 26px;border-radius:50%;background:#E4F4FB;display:flex;align-items:center;justify-content:center;color:var(--azur-profond)}
.erreurs{background:#FDECEC;border:1px solid #E8A9A9;border-radius:8px;padding:14px 18px;margin-bottom:22px;color:#8A2A2A;font-size:.92rem}
.erreurs ul{padding-left:20px;margin-top:6px}


/* --- Formulaire : aide et états de validation --- */
.aide{font-size:.78rem;color:var(--ardoise);margin-top:5px}
input:user-invalid,textarea:user-invalid{border-color:#C86B6B;box-shadow:0 0 0 3px rgba(200,107,107,.15)}
input:user-valid,textarea:user-valid{border-color:#7CBF9A}
::placeholder{color:#9AAAB4}

/* --- Menu mobile : affichage --- */
@media(max-width:900px){
  .burger{display:flex}
  header.colle .menu-mobile,header .menu-mobile{background:var(--encre)}
}
@media(min-width:901px){
  .menu-mobile{display:none !important}
}