/* =================================================================
   SELLIUM Solutions : feuille de style commune à toutes les pages
   Les trois couleurs de marque sont en haut. Modifie-les ici et
   l'ensemble du site suit.
   ================================================================= */
:root{
  --marque:#1B3C78;        /* bleu marine du mot SELLIUM */
  --marque-fonce:#0E2247;  /* déclinaison sombre, dégradés */
  --marque-vif:#35B8C4;    /* turquoise du mot Solutions */

  --paper:#161C23;         /* fond de page */
  --ciel:#1D242C;          /* bandes de section alternées */
  --carte:#232B34;         /* fond des blocs */
  --ink:#E8EDF2;           /* texte principal */
  --steel:#94A1AE;         /* texte secondaire */
  --line:#333D48;
  --acier:#7F8D9B;         /* accent neutre */
  --clair:#E8EDF2;
  --w:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
body{margin:0;background:var(--paper);color:var(--ink);
  font-family:"IBM Plex Sans",system-ui,-apple-system,sans-serif;
  font-size:17px;line-height:1.62;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{font-family:Archivo,system-ui,sans-serif;font-weight:700;line-height:1.09;
  letter-spacing:-.02em;margin:0}
p{margin:0 0 1.1rem}
a{color:inherit}
img{max-width:100%}
.wrap{max-width:var(--w);margin:0 auto;padding:0 28px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:16px;top:12px;z-index:200;background:var(--marque-vif);color:#08242B;
  padding:10px 16px;font-weight:600}

/* ---------- navigation ---------- */
.top{position:sticky;top:0;z-index:60;background:rgba(22,28,35,.94);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.top-in{display:flex;align-items:center;gap:30px;height:70px}
.brand{display:flex;align-items:center;gap:11px;font-family:Archivo;font-weight:800;
  font-size:1.14rem;text-decoration:none;color:var(--clair);white-space:nowrap}
.brand img{display:block;height:42px;width:auto}
.brand span{color:var(--steel);font-weight:500}
.nav{display:flex;gap:17px;margin-left:auto;font-size:.9rem;align-items:center}
.nav > li{list-style:none;position:relative}
.nav ul{list-style:none;margin:0;padding:0}
.nav a{text-decoration:none;color:var(--steel);padding:24px 0;border-bottom:2px solid transparent;
  display:inline-block;white-space:nowrap}
.nav a:hover,.nav a:focus-visible{color:var(--clair);border-bottom-color:var(--acier)}
.nav a[aria-current="page"]{color:var(--clair);border-bottom-color:var(--marque-vif)}
.has-sub > a::after{content:"";display:inline-block;margin-left:7px;vertical-align:2px;
  border:4px solid transparent;border-top-color:currentColor}
.sub{position:absolute;left:-18px;top:100%;min-width:246px;background:#1A222B;
  border:1px solid var(--line);border-top:2px solid var(--marque-vif);
  padding:8px 0;display:none;box-shadow:0 18px 34px rgba(0,0,0,.46)}
.has-sub:hover .sub,.has-sub:focus-within .sub{display:block}
.sub a{display:block;padding:9px 18px;border-bottom:0;width:100%}
.sub a:hover,.sub a:focus-visible{background:var(--carte);color:var(--clair);border-bottom:0}
.tel-top{font-weight:600;text-decoration:none;white-space:nowrap;margin-left:4px;
  background:var(--marque);color:#fff;padding:11px 18px;transition:background .15s}
.tel-top:hover{background:var(--marque-fonce)}
.burger{display:none;margin-left:auto;background:none;border:1px solid var(--line);
  color:var(--clair);font:inherit;font-size:.9rem;font-weight:600;padding:9px 14px;cursor:pointer}
@media(max-width:1220px){
  .top-in{height:62px;gap:14px}
  .burger{display:block}
  .tel-top{padding:9px 13px;font-size:.9rem}
  .nav{display:none;position:absolute;left:0;right:0;top:100%;flex-direction:column;
    align-items:stretch;gap:0;background:#141A21;border-bottom:1px solid var(--line);
    padding:8px 0 18px;max-height:78vh;overflow:auto}
  .nav.open{display:flex}
  .nav a{padding:13px 28px;border-bottom:1px solid var(--line);display:block}
  .nav a[aria-current="page"]{border-bottom-color:var(--line);color:var(--marque-vif)}
  .has-sub > a::after{display:none}
  .sub{position:static;display:block;border:0;box-shadow:none;background:transparent;padding:0}
  .sub a{padding-left:48px;color:#7E8B98;font-size:.9rem}
}

/* ---------- en-tête d'accueil ---------- */
.hero{position:relative;overflow:hidden;
  background:linear-gradient(168deg,#16212E 0%,#0B1119 58%,#101B29 100%);
  border-bottom:1px solid var(--line)}
.hero::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(58% 86% at 86% 46%, rgba(53,184,196,.15), transparent 66%),
    radial-gradient(48% 70% at 12% 100%, rgba(27,60,120,.30), transparent 70%),
    repeating-linear-gradient(115deg, rgba(232,237,242,.030) 0 1px, transparent 1px 44px)}
.hero-in{position:relative;z-index:2;padding:86px 0 0}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:.83rem;
  letter-spacing:.06em;color:var(--acier);font-weight:600;margin-bottom:22px}
.eyebrow::before{content:"";width:34px;height:2px;background:var(--acier)}
.hero h1{font-size:clamp(2.2rem,5.6vw,3.7rem);font-weight:800;color:#fff;max-width:16ch}
.hero h1 em{font-style:normal;color:var(--marque-vif)}
.lede{margin:24px 0 0;font-size:1.11rem;color:#AEBECD;max-width:54ch}
.cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}
.btn{display:inline-block;text-decoration:none;font-weight:600;font-size:.97rem;
  padding:14px 24px;transition:.15s}
.btn-solid{background:var(--marque-vif);color:#08242B}
.btn-solid:hover{background:#5AD0DB}
.btn-ghost{border:1.5px solid rgba(232,237,242,.45);color:#E8EDF2}
.btn-ghost:hover{background:rgba(255,255,255,.10);border-color:#E8EDF2}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;margin-top:60px;
  background:rgba(255,255,255,.16)}
.stats div{background:linear-gradient(135deg,var(--marque-fonce),var(--marque));padding:26px 14px 30px}
.stats b{display:block;font-family:Archivo;font-weight:700;font-size:1.7rem;color:#fff;letter-spacing:-.02em}
.stats span{font-size:.86rem;color:#B9C9D9}
@media(max-width:760px){
  .hero-in{padding-top:48px}
  .stats{grid-template-columns:1fr;margin-top:40px}
  .stats div{padding:18px 14px 20px}
}

/* ---------- en-tête de page intérieure ---------- */
.phero{background:linear-gradient(150deg,#16212E 0%,#0C131C 70%);
  border-bottom:1px solid var(--line);padding:52px 0 58px}
.crumb{font-size:.86rem;color:var(--steel);margin:0 0 20px}
.crumb a{color:var(--steel);text-decoration:none;border-bottom:1px solid var(--line)}
.crumb a:hover{color:var(--clair)}
.phero h1{font-size:clamp(1.85rem,4.2vw,2.85rem);color:#fff;max-width:20ch}
.phero .lede{max-width:62ch;font-size:1.06rem;margin-top:18px}

/* ---------- sections ---------- */
.sec{padding:82px 0}
.sec-ciel{background:var(--ciel)}
.sec-head{border-top:2px solid var(--marque-vif);padding-top:18px;margin-bottom:42px}
.sec-head h2{font-size:clamp(1.5rem,3.4vw,2.1rem);color:#fff}
.sec-head p{margin:14px 0 0;color:var(--steel);max-width:64ch}
.prose{max-width:68ch}
.prose h3{font-size:1.24rem;color:var(--clair);margin:34px 0 12px}
.prose p{color:#C2CEDA}
.prose ul{margin:0 0 1.2rem;padding-left:20px;color:#C2CEDA}
.prose li{margin-bottom:7px}
.prose strong{color:var(--clair)}

/* ---------- listes de prestations ---------- */
.row{display:grid;grid-template-columns:minmax(200px,.85fr) 2fr;gap:36px;
  padding:26px 22px 26px 18px;border-top:1px solid var(--line);
  align-items:start;border-left:3px solid transparent;transition:.15s;text-decoration:none;color:inherit}
.row:hover{border-left-color:var(--marque-vif);background:var(--ciel)}
.row:last-child{border-bottom:1px solid var(--line)}
.row h3{font-size:1.16rem;color:var(--clair)}
.row p{margin:0;font-size:.98rem;color:#BAC6D2}
.tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:13px}
.tag{font-family:"IBM Plex Mono",monospace;font-size:.73rem;
  border:1px solid var(--line);padding:3px 9px;color:var(--steel);background:var(--carte)}
@media(max-width:760px){.row{grid-template-columns:1fr;gap:12px;padding:22px 0 22px 14px}}

/* ---------- blocs équipements / cartes ---------- */
.eqs{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.eqs-3{grid-template-columns:repeat(3,1fr)}
.eq{background:var(--carte);border-top:3px solid var(--acier);padding:24px 26px 22px}
.eq h3{font-size:1.1rem;color:var(--clair);margin-bottom:10px}
.eq p{font-size:.95rem;color:#BAC6D2;margin:0 0 .8rem}
.eq p:last-child{margin-bottom:0}
.eq-do{margin-top:12px!important;padding-top:12px;border-top:1px solid var(--line);
  font-size:.9rem!important;color:var(--steel)!important;font-weight:600}
@media(max-width:960px){.eqs-3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:820px){.eqs,.eqs-3{grid-template-columns:1fr}}

/* ---------- fiche technique matériel ---------- */
.spec{display:grid;grid-template-columns:1.05fr 1fr;gap:52px;align-items:center}
.shot{position:relative;padding:22px 22px 0 0}
.shot::before{content:"";position:absolute;right:0;top:0;width:72%;height:74%;
  background:linear-gradient(135deg,var(--marque) 0%,var(--marque-fonce) 100%)}
.shot-frame{position:relative;background:#fff;padding:20px;box-shadow:0 16px 34px rgba(0,0,0,.42)}
.shot-frame img{display:block;width:100%;height:auto}
.shot-cap{position:relative;margin:0;padding:12px 20px 0;font-size:.78rem;
  font-family:"IBM Plex Mono",monospace;color:#5F6873;background:#fff}
.spec-id h3{font-size:1.42rem;color:#fff;margin-bottom:12px}
.spec-id p{font-size:.99rem;color:#BAC6D2}
.spec-list{margin:22px 0 0}
.spec-list > div{display:flex;justify-content:space-between;gap:18px;padding:9px 0;
  border-bottom:1px solid var(--line);font-size:.94rem}
.spec-list dt{color:var(--steel);margin:0}
.spec-list dd{margin:0;font-weight:600;text-align:right;color:var(--clair)}
.notes{display:grid;grid-template-columns:repeat(2,1fr);gap:30px;margin-top:52px}
.notes > div{background:var(--carte);border-top:3px solid var(--acier);padding:22px 22px 6px}
.notes h3{font-size:1rem;margin-bottom:9px;color:var(--clair)}
.notes p{font-size:.93rem;color:#BAC6D2}
@media(max-width:880px){.spec{grid-template-columns:1fr;gap:26px}.notes{grid-template-columns:1fr;gap:18px}}

/* ---------- secteurs ---------- */
.sect{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.sect li{background:var(--carte);border-left:3px solid var(--acier);
  padding:15px 18px;font-weight:600;font-size:.97rem;color:var(--clair)}
@media(max-width:820px){.sect{grid-template-columns:1fr;gap:9px}}

/* ---------- bandes bleu profond ---------- */
.deep{position:relative;overflow:hidden;color:#E6EDF4;
  background:linear-gradient(152deg,#091428 0%,#0F2549 72%,#12294F 100%)}
.deep .wrap{position:relative;z-index:2}
.deep .sec-head h2{color:#fff}
.deep .sec-head p{color:#B9C9D9}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.grid3 > div{border-top:2px solid rgba(232,237,242,.34);padding-top:16px}
.grid3 h3{font-size:1.03rem;margin-bottom:10px;color:#fff}
.grid3 p{font-size:.95rem;color:#BBD1E6;margin:0}
.hab{margin:48px 0 0;padding-top:28px;border-top:1px solid rgba(230,237,244,.26)}
.hab ul{list-style:none;padding:0;margin:16px 0 0;display:flex;flex-wrap:wrap;gap:9px}
.hab li{font-family:"IBM Plex Mono",monospace;font-size:.78rem;
  border:1px solid rgba(232,237,242,.28);padding:7px 12px;color:#D3DEEA;background:rgba(232,237,242,.05)}
@media(max-width:880px){.grid3{grid-template-columns:1fr;gap:24px}}

/* ---------- entreprise ---------- */
.split{display:grid;grid-template-columns:1.35fr 1fr;gap:56px;align-items:start}
.facts{border-top:2px solid var(--acier);padding-top:4px;margin:0}
.fact{display:flex;justify-content:space-between;gap:20px;padding:13px 0;
  border-bottom:1px solid var(--line);font-size:.95rem}
.fact dt{color:var(--steel);margin:0}
.fact dd{margin:0;font-weight:600;text-align:right;color:var(--clair)}
@media(max-width:820px){.split{grid-template-columns:1fr;gap:32px}}

/* ---------- repères chronologiques ---------- */
.steps{margin:0;padding:0;list-style:none;border-left:2px solid var(--line)}
.steps li{position:relative;padding:0 0 26px 26px}
.steps li::before{content:"";position:absolute;left:-7px;top:9px;width:12px;height:12px;
  background:var(--marque-vif)}
.steps h3{font-size:1.06rem;color:var(--clair);margin-bottom:6px}
.steps p{font-size:.96rem;color:#BAC6D2;margin:0}

/* ---------- bandeau d'appel ---------- */
.band{background:linear-gradient(140deg,var(--marque-fonce),var(--marque));padding:54px 0}
.band-in{display:flex;flex-wrap:wrap;gap:26px;align-items:center;justify-content:space-between}
.band h2{font-size:1.55rem;color:#fff;max-width:24ch}
.band p{margin:10px 0 0;color:#B9C9D9;max-width:52ch;font-size:.98rem}

/* ---------- pages liées ---------- */
.rel{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:8px}
.rel a{display:block;background:var(--carte);border-top:3px solid var(--acier);
  padding:20px 22px;text-decoration:none;transition:.15s}
.rel a:hover{border-top-color:var(--marque-vif);transform:translateY(-3px)}
.rel strong{display:block;font-family:Archivo;font-size:1.04rem;color:var(--clair);margin-bottom:5px}
.rel span{font-size:.9rem;color:var(--steel)}
@media(max-width:820px){.rel{grid-template-columns:1fr}}

/* ---------- contact ---------- */
.doors{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:56px}
.door{display:flex;flex-direction:column;align-items:flex-start;gap:7px;text-align:left;
  background:var(--carte);border:0;border-top:3px solid var(--acier);padding:22px 22px 24px;
  font-family:inherit;cursor:pointer;transition:.15s;text-decoration:none;color:inherit}
.door:hover{transform:translateY(-3px);box-shadow:0 12px 26px rgba(0,0,0,.36)}
.door-q{font-size:.85rem;color:var(--steel);line-height:1.4}
.door-a{font-family:Archivo;font-weight:700;font-size:1.06rem;color:var(--clair);
  letter-spacing:-.01em;line-height:1.2}
.door-a::after{content:" \2192"}
.door-n{font-family:"IBM Plex Mono",monospace;font-size:.84rem;color:#EAF2F8;margin-top:2px}
.door-tel{background:linear-gradient(140deg,var(--marque),var(--marque-fonce));
  border-top-color:var(--marque-vif)}
.door-tel .door-q{color:#B9C9D9}
.door-tel .door-a{color:#fff}
@media(max-width:980px){.doors{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.doors{grid-template-columns:1fr;margin-bottom:38px}}
.cgrid{display:grid;grid-template-columns:1fr 1.1fr;gap:56px;align-items:start}
.tels{margin:0 0 22px}
.tels dt{font-size:.83rem;color:var(--steel);margin-top:14px}
.tels dd{margin:2px 0 0;font-family:Archivo;font-size:1.3rem;font-weight:700}
.tels dd a{text-decoration:none;color:var(--clair)}
.tels dd a:hover{text-decoration:underline}
.coord a{font-weight:600;color:var(--clair);text-decoration:underline;
  text-underline-offset:3px;text-decoration-color:var(--acier)}
label{display:block;font-size:.86rem;font-weight:600;margin:0 0 6px}
input,textarea,select{width:100%;font:inherit;font-size:.97rem;padding:12px 14px;
  border:1.5px solid #48545F;border-left:3px solid var(--acier);
  background:var(--carte);color:var(--ink);border-radius:0;transition:border-color .15s}
select{appearance:none;
  background-image:linear-gradient(45deg,transparent 50%,var(--acier) 50%),
    linear-gradient(135deg,var(--acier) 50%,transparent 50%);
  background-position:calc(100% - 20px) 21px,calc(100% - 14px) 21px;
  background-size:6px 6px,6px 6px;background-repeat:no-repeat}
input:hover,textarea:hover{border-color:var(--acier);border-left-color:var(--clair)}
input:focus,textarea:focus,select:focus{outline:2px solid var(--marque-vif);outline-offset:1px;
  border-color:var(--marque-vif);border-left-color:var(--marque-vif)}
.field{margin-bottom:18px}
.btn-form{background:var(--marque);color:#fff;border:0;cursor:pointer;
  font-family:inherit;font-weight:600;font-size:.97rem;padding:14px 26px}
.btn-form:hover{background:var(--marque-fonce)}
.rgpd{font-size:.82rem;color:var(--steel);margin:14px 0 0}
@media(max-width:820px){.cgrid{grid-template-columns:1fr;gap:36px}}

/* ---------- mentions légales ---------- */
.r{display:flex;justify-content:space-between;gap:24px;padding:10px 0;
  border-bottom:1px solid var(--line);font-size:.95rem}
.r dt{color:var(--steel);margin:0}
.r dd{margin:0;text-align:right;font-weight:600}
@media(max-width:600px){.r{flex-direction:column;gap:2px}.r dd{text-align:left}}

/* ---------- pied de page ---------- */
footer{background:#0E1319;color:#8996A3;font-size:.9rem;padding:52px 0 34px}
.f-cols{display:grid;grid-template-columns:1.3fr 1fr 1fr 1.1fr;gap:34px;
  padding-bottom:30px;border-bottom:1px solid #1E262F}
.f-cols h3{font-size:.95rem;color:#DCE6EF;margin-bottom:12px}
.f-cols ul{list-style:none;margin:0;padding:0}
.f-cols li{margin-bottom:8px}
footer a{color:#B4C0CC;text-decoration:none}
footer a:hover{color:#fff;text-decoration:underline}
.f-in{display:flex;flex-wrap:wrap;gap:14px 32px;align-items:baseline;padding-top:24px}
.legal-id{font-family:"IBM Plex Mono",monospace;font-size:.79rem;margin-left:auto}
@media(max-width:900px){.f-cols{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.f-cols{grid-template-columns:1fr;gap:26px}.legal-id{margin-left:0}}