/* ==========================================================
   i-Tech — Design tokens
   ========================================================== */
:root{
  --graphite:   #14181C;
  --graphite-2: #1B2127;
  --blueprint:  #1B3A6B;
  --blueprint-2:#274C86;
  --steel:      #8B98A5;
  --steel-dim:  #5B6672;
  --paper:      #EDE9E1;
  --paper-dim:  #DAD4C8;
  --signal:     #FF6B1A;
  --copper:     #B87333;

  --font-display: 'Chakra Petch', sans-serif;
  --font-body:    'IBM Plex Sans', sans-serif;
  --font-mono:    'IBM Plex Mono', monospace;

  --container: 1180px;
  --edge-pad: clamp(20px, 5vw, 72px);

  --ease: cubic-bezier(.22,1,.36,1);
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; scroll-padding-top: 90px; }

body{
  margin:0;
  background: var(--graphite);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img{ max-width:100%; display:block; }
a{ color: inherit; text-decoration:none; }
ul, ol{ list-style:none; margin:0; padding:0; }
button{ font-family:inherit; cursor:pointer; }

::selection{ background: var(--signal); color: var(--graphite); }

:focus-visible{
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

.skip-link{
  position:absolute; left:-999px; top:0;
  background: var(--signal); color: var(--graphite);
  padding: 10px 16px; z-index: 999; font-family: var(--font-mono);
}
.skip-link:focus{ left: 16px; top: 16px; }

/* ==========================================================
   Blueprint background texture
   ========================================================== */
.blueprint-grid{
  position: fixed; inset:0; z-index:0; pointer-events:none;
  background-image:
    linear-gradient(rgba(139,152,165,.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139,152,165,.07) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 100% 60% at 50% 0%, black 40%, transparent 90%);
}

.edge-ticks{
  position: fixed; top:0; bottom:0; width: 28px; z-index: 1;
  pointer-events:none; display:none;
}
.edge-ticks--left{ left: 8px; }
.edge-ticks--right{ right: 8px; }
@media (min-width: 900px){
  .edge-ticks{
    display: block;
    background-image: repeating-linear-gradient(
      to bottom, rgba(139,152,165,.35) 0 1px, transparent 1px 40px
    );
  }
}

/* ==========================================================
   Utility
   ========================================================== */
.sheet-label{
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--signal);
  display:flex; align-items:center; gap:10px;
  margin: 0 0 22px;
}
.sheet-label__dot{
  width:7px; height:7px; border-radius:50%;
  background: var(--signal);
  box-shadow: 0 0 0 3px rgba(255,107,26,.2);
}

.section-title{
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.8rem, 3.4vw, 2.8rem);
  line-height: 1.15;
  margin: 0 0 18px;
  max-width: 18ch;
}
.section-intro{
  color: var(--steel);
  max-width: 56ch;
  font-size: 1.05rem;
  margin: 0 0 48px;
}

.btn{
  font-family: var(--font-mono);
  font-size: .85rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  padding: 15px 26px;
  border-radius: 2px;
  display: inline-flex; align-items:center; gap: 10px;
  border: 1px solid transparent;
  transition: transform .35s var(--ease), background .35s var(--ease), border-color .35s var(--ease), color .35s var(--ease);
}
.btn--solid{ background: var(--signal); color: var(--graphite); }
.btn--solid:hover{ transform: translateY(-2px); background:#ff7d38; }
.btn--outline{ border-color: var(--steel-dim); color: var(--paper); }
.btn--outline:hover{ border-color: var(--paper); transform: translateY(-2px); }
.btn--ghost{ color: var(--paper); border: 1px solid transparent; }
.btn--ghost:hover{ color: var(--signal); }
.arrow{ transition: transform .3s var(--ease); }
.btn--outline:hover .arrow{ transform: translateY(3px); }

/* ==========================================================
   Header
   ========================================================== */
.site-header{
  position: fixed; top:0; left:0; right:0; z-index: 100;
  background: rgba(20,24,28,.78);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(139,152,165,.15);
}
.header-inner{
  max-width: var(--container); margin:0 auto;
  padding: 18px var(--edge-pad);
  display:flex; align-items:center; justify-content:space-between; gap: 24px;
}
.logo{ display:flex; align-items:center; gap:10px; }
.logo-mark{
  font-family: var(--font-mono); font-weight:500;
  border: 1px solid var(--steel-dim);
  padding: 4px 7px; font-size: .8rem; color: var(--signal);
}
.logo-text{ font-family: var(--font-display); font-weight:600; font-size: 1.1rem; }

.logo-img {
  height: 40px;        /* Ajustez cette valeur selon la hauteur voulue */
  width: auto;
}

.footer-logo-img {
  height: 100px;        /* Un peu plus petit pour le pied de page */
  width: 100px;
}

.main-nav{ display:none; gap: 32px; font-size: .92rem; }
.main-nav a{ color: var(--steel); transition: color .25s var(--ease); position:relative; }
.main-nav a:hover{ color: var(--paper); }

.header-cta{ display:none; }

.nav-toggle{
  background:none; border:none; width: 32px; height: 22px;
  position: relative; padding:0;
}
.nav-toggle span{
  position:absolute; left:0; right:0; height:2px; background: var(--paper);
  transition: transform .3s var(--ease), opacity .3s var(--ease);
}
.nav-toggle span:nth-child(1){ top:0; }
.nav-toggle span:nth-child(2){ top:10px; }
.nav-toggle span:nth-child(3){ top:20px; }
.nav-toggle.is-open span:nth-child(1){ transform: translateY(10px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2){ opacity:0; }
.nav-toggle.is-open span:nth-child(3){ transform: translateY(-10px) rotate(-45deg); }

.mobile-nav{
  max-height:0; overflow:hidden;
  background: var(--graphite-2);
  transition: max-height .4s var(--ease);
  display:flex; flex-direction:column;
}
.mobile-nav.is-open{ max-height: 400px; }
.mobile-nav a{
  padding: 16px var(--edge-pad);
  border-top: 1px solid rgba(139,152,165,.12);
  font-family: var(--font-mono); font-size: .9rem;
}
.mobile-nav .btn{ margin: 16px var(--edge-pad); }

@media (min-width: 900px){
  .main-nav{ display:flex; }
  .header-cta{ display:inline-flex; }
  .nav-toggle{ display:none; }
  .mobile-nav{ display:none; }
}

/* ==========================================================
   Dropdown Services (menu principal)
   ========================================================== */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropbtn {
  /* hérite des styles des liens de navigation */
  display: inline-block;
}

.dropdown-content {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 240px;
  background: rgba(10, 10, 20, 0.75);   /* fond semi-transparent */
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 8px;
  padding: 8px 0;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
  z-index: 1000;
  border: 1px solid rgba(255, 255, 255, 0.08);
  pointer-events: auto;          /* autorise les clics */
  z-index: 9999;                 /* monte bien au-dessus des autres éléments */
}

.dropdown-content a {
  display: block;
  padding: 10px 20px;
  color: #fff;
  font-family: var(--font-body);  /* ou 'IBM Plex Sans', selon votre charte */
  font-weight: 400;
  font-size: 0.95rem;
  text-decoration: none;
  transition: background 0.2s ease;
  white-space: nowrap;
  pointer-events: auto;
  cursor: pointer;
}

.dropdown-content a:hover,
.dropdown-content a:focus {
  background: rgba(255, 255, 255, 0.08);
}

/* Affichage du menu au survol ou au focus */
.dropdown:hover .dropdown-content,
.dropdown:focus-within .dropdown-content {
  display: block;
}

/* Ajustement pour éviter que le sous-menu ne déborde à droite sur les petits écrans */
@media (max-width: 1024px) {
  .dropdown-content {
    left: auto;
    right: 0;
  }
}

/* Dans le menu mobile, on garde une présentation verticale classique */
/* (les liens sont déjà en colonne, pas besoin de modification) */

/* ==========================================================
   Hero
   ========================================================== */
.hero{
  position: relative; z-index: 2;
  min-height: 100vh;
  overflow: hidden; /* évite les débordements du canvas Three.js */
  display:flex; flex-direction:column; justify-content:center;
  padding: 150px var(--edge-pad) 60px;
  max-width: var(--container); margin:0 auto;
  gap: 60px;
}
.hero-inner{ max-width: 720px; }

.hero-title{
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.6rem, 7vw, 5.2rem);
  line-height: 1.02;
  margin: 0 0 28px;
}
.hero-title .line{ display:block; }
.hero-title .line--accent{ color: var(--signal); }

.hero-sub{
  font-size: 1.15rem;
  color: var(--steel);
  max-width: 52ch;
  margin: 0 0 40px;
}

.hero-actions{ display:flex; flex-wrap:wrap; gap: 16px; }

/* ==========================================================
   Thesis
   ========================================================== */
.thesis{ position:relative; z-index:2; padding: 120px var(--edge-pad); }
.thesis-inner{ max-width: var(--container); margin:0 auto; }
.thesis-title{
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.9rem, 4vw, 3.1rem);
  line-height: 1.25;
  max-width: 20ch;
  margin: 0 0 64px;
}
.thesis-title .strike{
  position:relative; color: var(--steel-dim); margin-right: 10px;
}
.thesis-title .strike::after{
  content:''; position:absolute; left:0; right:0; top:50%;
  border-top: 2px solid var(--steel-dim);
}
.thesis-title .highlight{ color: var(--signal); }

.thesis-pillars{
  display:grid; gap: 40px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.pillar{ border-top: 1px solid rgba(139,152,165,.25); padding-top: 20px; }
.pillar-index{ font-family: var(--font-mono); color: var(--copper); font-size:.85rem; }
.pillar h3{ font-family: var(--font-display); font-size: 1.25rem; margin: 10px 0 10px; }
.pillar p{ color: var(--steel); font-size: .95rem; margin:0; }

/* ==========================================================
   Expertise / modules
   ========================================================== */
.expertise{
  position:relative; z-index:2;
  background: var(--paper);
  color: var(--graphite);
  padding: 120px var(--edge-pad);
}
.expertise-inner{ max-width: var(--container); margin:0 auto; }
.expertise .sheet-label{ color: var(--blueprint); }
.expertise .section-intro{ color: var(--steel-dim); }

.module-grid{
  display:grid; gap: 1px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  background: var(--paper-dim);
  border: 1px solid var(--paper-dim);
}
.module-card{
  background: var(--paper);
  padding: 34px 28px;
  transition: background .35s var(--ease);
}
.module-card:hover{ background: #fff; }
.module-tag{
  font-family: var(--font-mono); font-size: .78rem;
  color: var(--copper); letter-spacing: .06em;
}
.module-card h3{
  font-family: var(--font-display); font-size: 1.25rem;
  margin: 12px 0 10px;
}
.module-card p{ color: var(--steel-dim); font-size: .95rem; margin:0; }

/* ==========================================================
   Edge / differentiator
   ========================================================== */
.edge{
  position:relative; z-index:2;
  background: var(--blueprint);
  padding: 120px var(--edge-pad);
}
.edge-inner{ max-width: 840px; margin: 0 auto; }
.edge .sheet-label{ color: var(--paper); opacity:.7; }
.edge-text{ font-size: 1.1rem; color: rgba(237,233,225,.85); margin-bottom: 40px; }
.edge-list{ display:grid; gap: 16px; }
.edge-list li{
  font-family: var(--font-mono); font-size: .92rem;
  padding-left: 24px; position: relative; color: var(--paper);
}
.edge-list li::before{
  content:''; position:absolute; left:0; top:8px;
  width: 8px; height:8px; background: var(--signal);
}

/* ==========================================================
   Method timeline
   ========================================================== */
.method{ position:relative; z-index:2; padding: 120px var(--edge-pad); }
.method-inner{ max-width: var(--container); margin:0 auto; }
.timeline{ margin-top: 60px; border-top: 1px solid rgba(139,152,165,.25); }
.timeline-step{
  display:grid; grid-template-columns: 70px 1fr;
  gap: 24px; padding: 32px 0;
  border-bottom: 1px solid rgba(139,152,165,.25);
}
.timeline-index{ font-family: var(--font-mono); color: var(--signal); font-size: 1.4rem; }
.timeline-step h3{ font-family: var(--font-display); font-size: 1.3rem; margin: 0 0 8px; }
.timeline-step p{ color: var(--steel); margin:0; max-width: 56ch; }

/* ==========================================================
   Engagements / spec sheet
   ========================================================== */
.engagements{ position:relative; z-index:2; padding: 120px var(--edge-pad); }
.engagements-inner{ max-width: var(--container); margin:0 auto; }
.spec-sheet{ border-top: 1px solid rgba(139,152,165,.25); margin-top: 40px; }
.spec-row{
  display:flex; justify-content:space-between; gap: 20px;
  padding: 18px 0; border-bottom: 1px solid rgba(139,152,165,.25);
  font-family: var(--font-mono); font-size: .95rem;
}
.spec-key{ color: var(--steel); }
.spec-value{ color: var(--paper); text-align:right; }

/* ==========================================================
   Engagements — pages de détail (engagements/*.php)
   Registre "cahier des engagements" : plus sobre, plus document
   que services/ — mêmes tokens, accent blueprint plutôt que signal
   pour distinguer le registre sans sortir de l'esprit du site.
   ========================================================== */

/* Citation d'ouverture "Notre engagement" (page engagements.php) */
.engagement-intro-statement{
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.3rem, 2.6vw, 1.8rem);
  line-height: 1.4;
  max-width: 32ch;
  color: var(--paper);
  border-left: 3px solid var(--blueprint-2);
  padding-left: 28px;
  margin: 0 0 56px;
}
.service-detail--paper .engagement-intro-statement{ color: var(--graphite); }

/* Sommaire des 8 engagements — lignes, pas cartes : lecture de document */
.commitment-index{ border-top: 1px solid rgba(139,152,165,.25); }
.commitment-row{
  display: grid;
  grid-template-columns: 64px 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 26px 4px;
  border-bottom: 1px solid rgba(139,152,165,.25);
  transition: background .3s var(--ease);
}
.commitment-row:hover{ background: rgba(39,76,134,.14); }
.commitment-index-num{
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--blueprint-2);
}
.commitment-index-body h3{
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin: 0 0 4px;
}
.commitment-index-body p{
  color: var(--steel);
  font-size: .9rem;
  margin: 0;
  max-width: 52ch;
}
.commitment-index-link{
  font-family: var(--font-mono);
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--blueprint-2);
  white-space: nowrap;
  transition: color .25s var(--ease);
}
.commitment-row:hover .commitment-index-link{ color: var(--paper); }
@media (max-width: 620px){
  .commitment-row{ grid-template-columns: 40px 1fr; row-gap: 10px; }
  .commitment-index-link{ grid-column: 2; }
}

/* Sommaire de navigation entre les 11 sous-pages (haut de chaque fiche) */
.engagements-toc{
  display: flex; flex-wrap: wrap; gap: 8px 6px;
  margin: 0 0 48px;
  font-family: var(--font-mono); font-size: .78rem;
}
.engagements-toc a{
  padding: 8px 14px;
  border: 1px solid var(--steel-dim);
  color: var(--steel);
  border-radius: 2px;
  transition: border-color .25s var(--ease), color .25s var(--ease), background .25s var(--ease);
}
.engagements-toc a:hover{ border-color: var(--blueprint-2); color: var(--paper); }
.engagements-toc a[aria-current="page"]{
  border-color: var(--blueprint-2);
  color: var(--paper);
  background: rgba(39,76,134,.28);
}
.service-detail--paper .engagements-toc a{ color: var(--steel-dim); border-color: var(--paper-dim); }
.service-detail--paper .engagements-toc a:hover{ color: var(--graphite); border-color: var(--blueprint); }
.service-detail--paper .engagements-toc a[aria-current="page"]{
  color: var(--graphite); border-color: var(--blueprint); background: rgba(27,58,107,.1);
}

/* Fiche "garanties" sur une page de détail — variante du spec-sheet home */
.commitment-spec{ border-top: 1px solid rgba(139,152,165,.25); margin: 32px 0; }
.commitment-spec-row{
  display:flex; justify-content:space-between; gap:20px;
  padding: 16px 0; border-bottom: 1px solid rgba(139,152,165,.25);
  font-family: var(--font-mono); font-size: .9rem;
}
.service-detail--paper .commitment-spec-row{ border-bottom-color: rgba(91,102,114,.2); }

/* "Nos principes d'ingénierie" — liste numérotée sobre, pas de carte */
.principles-list{ border-top: 1px solid rgba(139,152,165,.25); }
.principle-row{
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid rgba(139,152,165,.25);
}
.principle-num{
  font-family: var(--font-mono);
  font-size: .82rem;
  color: var(--steel-dim);
  letter-spacing: .04em;
  padding-top: 3px;
}
.principle-row p{
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.05rem;
  line-height: 1.4;
  color: var(--paper);
  margin: 0;
}
.service-detail--paper .principle-row p{ color: var(--graphite); }

/* ==========================================================
   Contact
   ========================================================== */
.contact{
  position:relative; z-index:2;
  background: var(--paper); color: var(--graphite);
  padding: 120px var(--edge-pad);
}
.contact-inner{ max-width: 760px; margin:0 auto; }
.contact .sheet-label{ color: var(--blueprint); }

.contact-form{
  margin-top: 20px;
  display:grid; grid-template-columns: 1fr 1fr; gap: 22px 24px;
}
.form-row{ display:flex; flex-direction:column; gap: 8px; }
.form-row--full{ grid-column: 1 / -1; }
.form-row label{
  font-family: var(--font-mono); font-size: .8rem;
  text-transform:uppercase; letter-spacing:.05em; color: var(--steel-dim);
}
.form-row input, .form-row textarea{
  font-family: var(--font-body); font-size: 1rem;
  background: transparent; border: none;
  border-bottom: 1px solid var(--steel-dim);
  padding: 10px 2px; color: var(--graphite);
  transition: border-color .3s var(--ease);
}
.form-row input:focus, .form-row textarea:focus{ border-color: var(--blueprint); outline:none; }
.contact-form .btn{ grid-column: 1 / -1; justify-self:start; margin-top: 10px; }

@media (max-width: 620px){
  .contact-form{ grid-template-columns: 1fr; }
}

/* ==========================================================
   Footer
   ========================================================== */
.site-footer{
  position:relative; z-index:2;
  background: var(--graphite-2);
  padding: 70px var(--edge-pad) 30px;
}
.footer-inner{
  max-width: var(--container); margin:0 auto;
  display:grid; gap: 40px;
  grid-template-columns: 1.4fr repeat(3, 1fr);
}
.footer-brand{ display:flex; flex-direction:column; gap:10px; }
.footer-brand p{ color: var(--steel); font-size: .9rem; max-width: 28ch; margin-top:8px; }
.footer-col{ display:flex; flex-direction:column; gap: 12px; }
.footer-col h4{
  font-family: var(--font-mono); font-size: .78rem;
  text-transform:uppercase; letter-spacing:.06em; color: var(--steel-dim);
  margin: 0 0 4px;
}
.footer-col a, .footer-col span{ color: var(--steel); font-size: .92rem; }
.footer-col a:hover{ color: var(--signal); }

.footer-bottom{
  max-width: var(--container); margin: 50px auto 0;
  padding-top: 24px; border-top: 1px solid rgba(139,152,165,.15);
  font-family: var(--font-mono); font-size: .78rem; color: var(--steel-dim);
}

@media (max-width: 760px){
  .footer-inner{ grid-template-columns: 1fr 1fr; }
}

/* ==========================================================
   Scroll reveal base state
   ========================================================== */
[data-reveal]{
  opacity: 0;
  transform: translateY(28px);
}

/* ==========================================================
   Reduced motion
   ========================================================== */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  [data-reveal]{ opacity:1; transform:none; }
  .diagram-line{ stroke-dashoffset:0; }
  *{ animation-duration: .001ms !important; transition-duration: .001ms !important; }
}
/* ==========================================================
   HERO AVEC ANIMATION 3D (Three.js) - ajouts
   ========================================================== */

/* 1. Le conteneur du canvas – fixed en fond */
#canvas-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1;
  pointer-events: none; /* important pour que les clics passent à travers */
}
/* Force le canvas à occuper 100% du conteneur sans décalage */
#canvas-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1;
  pointer-events: none;
  overflow: hidden; /* évite tout débordement */
}

#canvas-container canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
  object-fit: cover; /* conserve le ratio si nécessaire */
}

/* 2. L'overlay texte – au-dessus du canvas */
.hero-overlay {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100vh; /* occupe toute la hauteur de la section */
  text-align: center;
  padding: 2rem;
  pointer-events: none; /* on bloque les clics sur le texte, mais pas sur les boutons */
}

/* 3. On réactive les clics sur les boutons et liens dans l'overlay */
.hero-overlay .hero-actions,
.hero-overlay .hero-actions * {
  pointer-events: auto;
}

/* 4. L'espaceur qui donne la hauteur de scroll à la hero */
.hero-scroll-spacer {
  height: 300vh; /* 3 fois la hauteur d'écran pour que l'animation ait le temps de se jouer */
  pointer-events: none;
  background: transparent;
}

/* 6. Amélioration de la lisibilité des textes sur le fond sombre */
.hero-title .line {
  color: #ffffff;
  text-shadow: 0 0 30px rgba(0, 0, 0, 0.8);
}

.hero-sub {
  color: #d0ddee;
  text-shadow: 0 0 20px rgba(0, 0, 0, 0.9);
}

.sheet-label {
  color: #a0c0ff;
  text-shadow: 0 0 15px rgba(0, 0, 0, 0.8);
}
/* === Rendre les sections transparentes avec flou === */

/* Sections sombres (graphite) */
.thesis,
.method,
.engagements {
  background: rgba(20, 24, 28, 0.8) !important;
  backdrop-filter: blur(8.5px);
  -webkit-backdrop-filter: blur(6px);
}

/* Sections claires (paper) */
.expertise,
.contact {
  background: rgba(237, 233, 225, 0.88) !important; /* var(--paper) translucide, texte graphite reste lisible */
  backdrop-filter: blur(8.5px);
  -webkit-backdrop-filter: blur(8.5px);
}

/* Section edge (bleue) */
.edge {
  background: rgba(27, 58, 107, 0.8) !important;
  backdrop-filter: blur(8.5px);
  -webkit-backdrop-filter: blur(8.5px);
}

/* ==========================================================
   Page-hero (bannière des pages secondaires, non-3D)
   ========================================================== */
.page-hero{
  position: relative; z-index: 2;
  padding: 160px var(--edge-pad) 80px;
  max-width: var(--container); margin: 0 auto;
}
.page-hero-inner{ max-width: 780px; }
.page-hero-title{
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.1;
  margin: 0 0 24px;
}
.page-hero-sub{
  font-size: 1.1rem;
  color: var(--steel);
  max-width: 60ch;
  margin: 0;
}

/* ==========================================================
   Service hub grid
   ========================================================== */
.service-hub{
  position: relative; z-index: 2;
  background: var(--paper);
  color: var(--graphite);
  padding: 40px var(--edge-pad) 120px;
}
.service-hub-inner{
  max-width: var(--container); margin: 0 auto;
  display: grid; gap: 1px;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  background: var(--paper-dim);
  border: 1px solid var(--paper-dim);
}
.service-hub-card{
  background: var(--paper);
  padding: 40px 32px;
  display: flex; flex-direction: column; gap: 14px;
  transition: background .35s var(--ease);
}
.service-hub-card:hover{ background: #fff; }
.service-hub-card h2{
  font-family: var(--font-display); font-size: 1.4rem; margin: 0;
}
.service-hub-card p{
  color: var(--steel-dim); font-size: .95rem; margin: 0; flex-grow: 1;
}
.service-hub-link{
  font-family: var(--font-mono); font-size: .82rem;
  text-transform: uppercase; letter-spacing: .04em;
  color: var(--blueprint); display: inline-flex; align-items: center; gap: 8px;
  margin-top: 4px;
}
.service-hub-link .arrow{ transition: transform .3s var(--ease); }
.service-hub-link:hover .arrow{ transform: translateX(4px); }

/* ==========================================================
   CTA de clôture (pages secondaires)
   ========================================================== */
.hub-cta{
  position: relative; z-index: 2;
  background: var(--blueprint);
  padding: 100px var(--edge-pad);
  text-align: center;
}
.hub-cta-inner{ max-width: 700px; margin: 0 auto; }
.hub-cta .sheet-label{ justify-content: center; color: var(--paper); opacity: .7; }
.hub-cta .section-title{ max-width: none; }
.hub-cta .hero-actions{ justify-content: center; }

/* ==========================================================
   Indicateur de page active dans la nav
   ========================================================== */
.main-nav a[aria-current="page"],
.mobile-nav a[aria-current="page"]{
  color: var(--paper);
  border-bottom: 1px solid var(--signal);
}

/* ==========================================================
   Breadcrumb
   ========================================================== */
.breadcrumb{
  font-family: var(--font-mono); font-size: .78rem;
  color: var(--steel-dim); margin: 0 0 20px;
}
.breadcrumb a{ color: var(--steel); }
.breadcrumb a:hover{ color: var(--signal); }
.breadcrumb span[aria-current]{ color: var(--paper); }

/* ==========================================================
   Service detail — sections génériques
   ========================================================== */
.service-detail{ position:relative; z-index:2; padding: 100px var(--edge-pad); }
.service-detail-inner{ max-width: var(--container); margin:0 auto; }
.service-detail-inner--narrow{ max-width: 760px; }
.service-detail--paper{ background: var(--paper); color: var(--graphite); }
.service-detail--paper .sheet-label{ color: var(--blueprint); }
.service-detail--paper .section-intro{ color: var(--steel-dim); }
.service-detail--blueprint{ background: var(--blueprint); }
.service-detail--blueprint .sheet-label{ color: var(--paper); opacity:.7; }

.problem-list{ display:grid; gap: 16px; max-width: 720px; }
.problem-list li{
  font-family: var(--font-mono); font-size: .92rem;
  padding-left: 24px; position: relative;
}
.problem-list li::before{
  content:''; position:absolute; left:0; top:8px;
  width: 8px; height:8px; background: var(--signal);
}

.offer-grid{
  display:grid; gap: 28px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.offer-card{ border-top: 1px solid rgba(139,152,165,.25); padding-top: 18px; }
.offer-card h3{ font-family: var(--font-display); font-size: 1.1rem; margin: 0 0 8px; }
.offer-card p{ font-size: .92rem; margin:0; color: var(--steel-dim); }
.service-detail:not(.service-detail--paper) .offer-card p{ color: var(--steel); }

.usecase-block{
  max-width: 760px;
  border-left: 3px solid var(--signal);
  padding-left: 24px;
  font-size: 1.05rem;
  color: rgba(237,233,225,.9);
}

.tech-tags{ display:flex; flex-wrap:wrap; gap: 12px; }
.tech-tags span{
  font-family: var(--font-mono); font-size: .8rem;
  border: 1px solid var(--steel-dim); color: var(--steel);
  padding: 8px 14px; border-radius: 2px;
}

.faq-list{ display:grid; gap: 12px; max-width: 720px; }
.faq-list details{
  border-bottom: 1px solid rgba(139,152,165,.25);
  padding: 16px 0;
}
.faq-list summary{
  font-family: var(--font-display); font-weight: 600;
  cursor: pointer; list-style: none; font-size: 1.02rem;
}
.faq-list summary::-webkit-details-marker{ display:none; }
.faq-list summary::after{
  content: '+'; float: right; font-family: var(--font-mono);
  color: var(--signal);
}
.faq-list details[open] summary::after{ content: '−'; }
.faq-list p{ margin: 12px 0 0; color: var(--steel-dim); font-size: .95rem; }


/* ==========================================================
   Menu mobile – accordéon modernisé (Option 2)
   ========================================================== */

.mobile-nav {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(.22,1,.36,1);
  background: var(--graphite-2);
  display: flex;
  flex-direction: column;
}

.mobile-nav.is-open {
  max-height: calc(100vh - 80px);
  overflow-y: auto;
}

/* Ligne "Services" : lien à gauche, bouton à droite */
.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--edge-pad);
  border-bottom: 1px solid rgba(139,152,165,.12);
  background: transparent;
}

.accordion-link {
  flex: 1;
  padding: 16px 0;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--paper);
  text-decoration: none;
  transition: color 0.2s;
}
.accordion-link:hover {
  color: var(--signal);
}

.accordion-trigger {
  flex-shrink: 0;
  background: rgba(255,255,255,0.06);
  border: none;
  border-radius: 6px;
  padding: 8px 10px;
  margin-left: 12px;
  color: var(--steel);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}
.accordion-trigger:hover {
  background: rgba(255,255,255,0.14);
  color: var(--paper);
}
.accordion-trigger svg {
  display: block;
  transition: transform 0.3s ease;
}
.accordion-trigger[aria-expanded="true"] svg {
  transform: rotate(180deg);
}

/* Liste des sous-services */
.accordion-content {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  background: rgba(0,0,0,0.2);
}
.accordion-content.open {
  max-height: 500px;
}

.accordion-content li {
  padding: 0;
}
.accordion-content li a {
  display: block;
  padding: 12px var(--edge-pad) 12px calc(var(--edge-pad) + 20px);
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--steel);
  border-bottom: 1px solid rgba(139,152,165,.06);
  transition: background 0.2s, color 0.2s;
  text-decoration: none;
}
.accordion-content li a:hover {
  background: rgba(255,255,255,0.04);
  color: var(--paper);
}

/* Lien "Tous les services" en bas de la liste */
.accordion-content li.see-all {
  border-top: 1px solid rgba(139,152,165,.15);
  margin-top: 4px;
}
.accordion-content li.see-all a {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--signal);
  padding: 14px var(--edge-pad) 14px calc(var(--edge-pad) + 20px);
  background: rgba(255,107,26,0.04);
}
.accordion-content li.see-all a:hover {
  background: rgba(255,107,26,0.12);
  color: #ff8a4a;
}

/* Liens directs du menu (Méthode, etc.) */
.mobile-nav > a:not(.btn) {
  display: block;
  padding: 16px var(--edge-pad);
  border-bottom: 1px solid rgba(139,152,165,.12);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--paper);
  text-decoration: none;
  transition: background 0.2s;
}
.mobile-nav > a:not(.btn):hover {
  background: rgba(255,255,255,0.04);
}

.mobile-nav .btn {
  margin: 16px var(--edge-pad);
  align-self: flex-start;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* Liens directs (Méthode, etc.) */
.mobile-nav > a:not(.btn) {
  display: block;
  padding: 16px var(--edge-pad);
  border-top: 1px solid rgba(139,152,165,.12);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--paper);
  transition: background 0.2s;
}

.mobile-nav > a:not(.btn):hover {
  background: rgba(255,255,255,0.05);
}

.mobile-nav .btn {
  margin: 16px var(--edge-pad);
  align-self: flex-start;
}
.mobile-nav.is-open {
  max-height: calc(100vh - 80px); /* 80px = hauteur du header */
  overflow-y: auto;
}
/* ==========================================================
   Feature list — items positifs dans une module-card
   (même registre visuel que .problem-list : puce carrée signal,
   police mono — mais sémantique dédiée aux listes de fonctionnalités)
   ========================================================== */
.feature-list{ display:grid; gap: 10px; margin-top: 14px; }
.feature-list li{
  font-family: var(--font-mono); font-size: .85rem;
  padding-left: 20px; position: relative;
  color: var(--steel-dim);
}
.feature-list li::before{
  content:''; position:absolute; left:0; top:7px;
  width: 6px; height:6px; background: var(--signal);
}