/* ============================================================
   MSolutions3D — Feuille de style principale
   ============================================================ */

:root {
  --bleu-fonce: #0d3b5c;
  --bleu: #0d4f7a;
  --turquoise: #14b8a6;
  --turquoise-fonce: #0e8f82;
  --encre: #1d2b36;
  --texte: #3d4c59;
  --texte-doux: #5f7180;
  --fond: #ffffff;
  --fond-alt: #f4f8fa;
  --bordure: #e2eaef;
  --blanc: #ffffff;
  --rayon: 14px;
  --ombre: 0 10px 30px rgba(13, 59, 92, 0.10);
  --transition: 0.25s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  color: var(--texte);
  background: var(--fond);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

.container {
  width: min(1120px, 92%);
  margin-inline: auto;
}

/* ============ En-tête ============ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--bordure);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.7rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
}

.brand-mark { width: 40px; height: 40px; flex: none; }

.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--bleu-fonce);
  letter-spacing: -0.01em;
}

.brand-suffix { font-weight: 400; color: var(--texte-doux); }

.main-nav {
  display: flex;
  align-items: center;
  gap: 1.05rem;
}

.main-nav a {
  text-decoration: none;
  color: var(--encre);
  font-weight: 500;
  font-size: 0.98rem;
  white-space: nowrap;
  transition: color var(--transition);
}

.main-nav a:hover { color: var(--turquoise-fonce); }

/* Souligne les 3 pages principales dans la barre de navigation
   (Logiciels & applis, Impression 3D, Conseil). Le lien « Contact » et le
   bouton « Demander un devis » finissent par #contact : ils ne sont pas ciblés. */
.main-nav a[href$="logiciels.html"],
.main-nav a[href$="impression-3d.html"],
.main-nav a[href$="conseil.html"] {
  text-decoration: underline;
  text-decoration-color: var(--turquoise);
  text-decoration-thickness: 2px;
  text-underline-offset: 5px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav-toggle span {
  width: 24px;
  height: 2.5px;
  background: var(--bleu-fonce);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ============ Boutons ============ */

.btn {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.btn:active { transform: scale(0.98); }

.btn-primary {
  background: linear-gradient(135deg, var(--bleu) 0%, var(--turquoise) 100%);
  color: var(--blanc);
  box-shadow: 0 6px 18px rgba(20, 184, 166, 0.35);
}

.btn-primary:hover { box-shadow: 0 8px 24px rgba(20, 184, 166, 0.5); transform: translateY(-2px); }

.btn-ghost {
  border: 2px solid var(--bleu);
  color: var(--bleu);
}

.btn-ghost:hover { background: var(--bleu); color: var(--blanc); }

.btn-nav { padding: 0.5rem 1.1rem; color: var(--blanc) !important; }

.btn-lg { font-size: 1.1rem; padding: 0.9rem 1.8rem; }

/* ============ Héro ============ */

.hero {
  background:
    radial-gradient(ellipse 80% 60% at 85% -10%, rgba(20, 184, 166, 0.25), transparent),
    linear-gradient(160deg, var(--bleu-fonce) 0%, var(--bleu) 55%, #0a6a86 100%);
  color: var(--blanc);
  padding-block: 5.5rem 4.5rem;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 3rem;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  padding: 0.3rem 0.9rem;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  margin-bottom: 1.2rem;
}

.hero h1 {
  font-size: clamp(1.9rem, 4vw, 2.9rem);
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin-bottom: 1.1rem;
}

.hero .accent {
  background: linear-gradient(90deg, #3ee6c9, #8be9d5);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.85);
  max-width: 34rem;
  margin-bottom: 1.8rem;
}

.hero-actions { display: flex; gap: 0.9rem; flex-wrap: wrap; }

.hero .btn-ghost { border-color: rgba(255, 255, 255, 0.6); color: var(--blanc); }
.hero .btn-ghost:hover { background: rgba(255, 255, 255, 0.12); }

.hero-points {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.hero-points li {
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--rayon);
  padding: 0.9rem 1.1rem;
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.88);
}

.point-icon { font-size: 1.4rem; line-height: 1.2; }

.point-svg { width: 34px; height: 34px; display: block; }

/* ============ Sections ============ */

.section { padding-block: 4.5rem; }

.section-alt { background: var(--fond-alt); }

.section-kicker {
  color: var(--turquoise-fonce);
  font-weight: 700;
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.4rem;
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  color: var(--encre);
  letter-spacing: -0.01em;
  margin-bottom: 2.2rem;
}

/* ============ Cartes ============ */

.cards-2col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.6rem;
}

.cards-3col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.6rem;
}

.card {
  background: var(--blanc);
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
  padding: 1.8rem;
  box-shadow: 0 2px 10px rgba(13, 59, 92, 0.05);
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover { transform: translateY(-4px); box-shadow: var(--ombre); }

.card h3 { color: var(--encre); font-size: 1.15rem; margin-bottom: 0.3rem; }

.card-icon { font-size: 1.9rem; display: block; margin-bottom: 0.8rem; }

.card-tag {
  color: var(--turquoise-fonce);
  font-size: 0.85rem;
  font-weight: 600;
}

.card-product-head {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.product-logo {
  width: 64px;
  height: 64px;
  object-fit: contain;
  border-radius: 12px;
  border: 1px solid var(--bordure);
  background: var(--blanc);
  flex: none;
}

.product-logo-custom {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: var(--blanc);
  background: linear-gradient(135deg, var(--bleu) 0%, var(--turquoise) 100%);
  border: none;
}

.feature-list {
  list-style: none;
  margin-block: 1rem 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.feature-list li {
  padding-left: 1.6rem;
  position: relative;
  font-size: 0.97rem;
}

.feature-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--turquoise-fonce);
  font-weight: 700;
}

.card-actions { margin-top: auto; }

/* ============ À propos ============ */

.apropos-inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: start;
}

.apropos-inner p { margin-bottom: 1rem; }

.apropos-values {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.apropos-values li {
  background: var(--fond-alt);
  border-left: 4px solid var(--turquoise);
  border-radius: 0 10px 10px 0;
  padding: 1rem 1.2rem;
  font-size: 0.97rem;
}

.apropos-values strong { color: var(--encre); }

/* ============ Contact ============ */

.section-contact {
  background:
    radial-gradient(ellipse 70% 80% at 15% 110%, rgba(20, 184, 166, 0.2), transparent),
    linear-gradient(160deg, var(--bleu-fonce) 0%, var(--bleu) 100%);
  color: var(--blanc);
  text-align: center;
}

.section-contact .section-kicker { color: #3ee6c9; }
.section-contact .section-title { color: var(--blanc); margin-bottom: 0.8rem; }

.contact-sub {
  color: rgba(255, 255, 255, 0.85);
  max-width: 36rem;
  margin: 0 auto 1.8rem;
}

.contact-note {
  margin-top: 1.4rem;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.65);
}

/* ============ Pied de page ============ */

.site-footer {
  background: #0a2d47;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  padding-block: 1.4rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-footer a { color: rgba(255, 255, 255, 0.85); text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }

/* ============ Animations d'apparition ============ */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ============ Responsive ============ */

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 2.2rem; }
  .cards-2col, .cards-3col { grid-template-columns: 1fr; }
  .apropos-inner { grid-template-columns: 1fr; gap: 1.8rem; }
  /* Sur mobile, les cartes du héros feraient doublon avec la section
     « Choisissez votre univers » juste en dessous : on les masque. */
  .hero-points { display: none; }
}

/* ============ Navigation : page active ============ */

.main-nav a.nav-active { color: var(--turquoise-fonce); font-weight: 700; }

/* ============ Héro de page interne ============ */

.page-hero { padding-block: 4rem 3.5rem; }

.page-hero .container {
  display: flex;
  flex-direction: column;
  gap: 2.2rem;
}

.hero-stats {
  list-style: none;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-stats li {
  flex: 1 1 10rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--rayon);
  padding: 1rem 1.2rem;
  text-align: center;
}

.hero-stats strong {
  display: block;
  font-size: 1.7rem;
  color: #3ee6c9;
  letter-spacing: -0.02em;
}

.hero-stats span {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.8);
}

/* ============ Cartes pôles (accueil) ============ */

.pole-card {
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.pole-img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.pole-img-soft {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
  background:
    radial-gradient(ellipse 80% 80% at 80% 0%, rgba(20, 184, 166, 0.35), transparent),
    linear-gradient(150deg, var(--bleu-fonce), var(--bleu));
  color: rgba(255, 255, 255, 0.9);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.pole-soft-mark { width: 64px; height: 64px; }

.pole-body {
  padding: 1.8rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.pole-body .card-actions { margin-top: auto; padding-top: 0.4rem; }

/* ============ Animations des cartes pôles (accueil) ============ */
.pole-anim { position: relative; overflow: hidden; }

/* -- Impression 3D : construction technique, couches fines -- */
.anim-print {
  background:
    radial-gradient(ellipse 85% 70% at 78% 6%, rgba(20, 184, 166, 0.26), transparent),
    linear-gradient(150deg, var(--bleu-fonce), var(--bleu));
}
.anim-print .bp-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  background-size: 20px 20px;
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 52%, #000 55%, transparent);
          mask-image: radial-gradient(ellipse 80% 80% at 50% 52%, #000 55%, transparent);
}
.anim-print .print-rail {
  position: absolute; left: 46px; right: 46px; top: 44px; height: 2px;
  background: rgba(255, 255, 255, 0.22);
}
.anim-print .print-head {
  position: absolute; top: 34px; left: 50%; width: 20px; height: 13px; margin-left: -10px;
  background: rgba(255, 255, 255, 0.55); border-radius: 3px;
  animation: printHead 2.2s ease-in-out infinite;
}
.anim-print .print-head::after {
  content: ""; position: absolute; left: 50%; bottom: -7px; margin-left: -1px;
  width: 2px; height: 7px; background: #3ee6c9;
}
.anim-print .print-plate {
  position: absolute; bottom: 30px; left: 50%; width: 150px; height: 4px; margin-left: -75px;
  background: rgba(255, 255, 255, 0.28); border-radius: 2px;
}
.anim-print .print-stack {
  position: absolute; bottom: 34px; left: 50%; width: 80px; margin-left: -40px;
  height: 0; overflow: hidden;
  animation: printBuild 4.6s ease-in-out infinite;
}
.anim-print .print-stack::after {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: #b9fbef; box-shadow: 0 0 8px 1px rgba(62, 230, 201, 0.7);
}
.anim-print .print-inner {
  position: absolute; left: 0; bottom: 0; width: 100%;
  display: flex; flex-direction: column-reverse; align-items: center; gap: 1.5px;
}
.anim-print .print-inner i {
  height: 2px; border-radius: 1px;
  background: rgba(139, 233, 213, 0.9);
}
@keyframes printHead {
  0%, 100% { transform: translateX(-52px); }
  50%      { transform: translateX(52px); }
}
@keyframes printBuild {
  0%   { height: 0; }
  62%  { height: 70px; }
  88%  { height: 70px; }
  100% { height: 0; }
}

/* -- Logiciels & applis : de vraies lignes de code qui s'écrivent -- */
.anim-code {
  display: flex; align-items: center; justify-content: center;
  background:
    radial-gradient(ellipse 80% 80% at 80% 0%, rgba(20, 184, 166, 0.26), transparent),
    linear-gradient(150deg, var(--bleu-fonce), var(--bleu));
}
.anim-code .code-window {
  width: 82%; max-width: 320px; height: 160px;
  background: rgba(8, 26, 44, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 12px; box-shadow: 0 12px 28px rgba(0, 0, 0, 0.28);
  display: flex; flex-direction: column; overflow: hidden;
}
.anim-code .code-bar {
  display: flex; gap: 6px; align-items: center;
  padding: 8px 12px; background: rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
}
.anim-code .code-bar i { width: 9px; height: 9px; border-radius: 50%; background: rgba(255, 255, 255, 0.4); }
.anim-code .code-bar i:nth-child(1) { background: #ff6b6b; }
.anim-code .code-bar i:nth-child(2) { background: #ffd36b; }
.anim-code .code-bar i:nth-child(3) { background: #3ee6c9; }
.anim-code .code-file {
  margin-left: auto; font-style: normal; font-size: 10px; letter-spacing: 0.02em;
  color: rgba(255, 255, 255, 0.5);
  font-family: "Consolas", "SFMono-Regular", Menlo, monospace;
}
.anim-code .code-body {
  margin: 0; flex: 1; padding: 12px 14px;
  font-family: "Consolas", "SFMono-Regular", Menlo, monospace;
  font-size: 11.5px; line-height: 1.62; color: #c9dcec;
  white-space: pre; overflow: hidden;
}
.anim-code .cl {
  display: block; width: -moz-fit-content; width: fit-content;
  clip-path: inset(0 100% 0 0);
  animation: codeType 6s ease infinite;
  animation-delay: var(--d, 0s);
}
.anim-code .c-kw { color: #5ad1bd; }
.anim-code .c-fn { color: #7fb0ff; }
.anim-code .c-pr { color: #e6b980; }
.anim-code .code-cur {
  display: inline-block; width: 6px; height: 13px; vertical-align: -2px;
  background: #3ee6c9; margin-left: 1px;
  animation: codeBlink 1.05s steps(1, end) infinite;
}
@keyframes codeType {
  0%   { clip-path: inset(0 100% 0 0); }
  10%  { clip-path: inset(0 0 0 0); }
  90%  { clip-path: inset(0 0 0 0); }
  100% { clip-path: inset(0 100% 0 0); }
}
@keyframes codeBlink { 0%, 50% { opacity: 1; } 50.01%, 100% { opacity: 0; } }

/* -- Conseil : optimisation des process (indicateurs en hausse) -- */
/* -- Conseil : engrenages d'un processus qui tournent et s'engrènent -- */
.anim-conseil {
  display: flex; align-items: center; justify-content: center;
  background:
    radial-gradient(ellipse 85% 70% at 80% 6%, rgba(20, 184, 166, 0.26), transparent),
    linear-gradient(150deg, var(--bleu-fonce), var(--bleu));
}
.anim-conseil .gears { width: 100%; height: 100%; display: block; }
.anim-conseil .gear {
  transform-box: fill-box;
  transform-origin: center;
  animation: gearSpin 12s linear infinite;
}
/* Vitesses proportionnelles au nombre de dents (12 / 9 / 8) et sens opposés :
   les engrenages restent « engrenés ». */
.anim-conseil .gear-a { animation-duration: 13s; }
.anim-conseil .gear-b { animation-duration: 9s;  animation-direction: reverse; }
.anim-conseil .gear-c { animation-duration: 8s;  animation-direction: reverse; }
@keyframes gearSpin { to { transform: rotate(360deg); } }

/* Respect de la préférence système « animations réduites » (accessibilité) */
@media (prefers-reduced-motion: reduce) {
  .anim-print .print-head, .anim-print .print-stack,
  .anim-code .cl, .anim-code .code-cur,
  .anim-conseil .gear { animation: none; }
  .anim-print .print-stack { height: 70px; }
  .anim-code .cl { clip-path: none; }
  .anim-code .code-cur { opacity: 1; }
}

/* ============ Grille 4 colonnes (engagements) ============ */

.cards-4col {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.4rem;
}

/* ============ Étapes du processus ============ */

.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.4rem;
  counter-reset: etape;
}

.steps li {
  background: var(--blanc);
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
  padding: 1.6rem;
  position: relative;
}

.step-num {
  display: inline-block;
  font-size: 1.6rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--bleu), var(--turquoise));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 0.5rem;
}

.steps h3 { color: var(--encre); font-size: 1.05rem; margin-bottom: 0.4rem; }
.steps p { font-size: 0.93rem; }

/* ============ Matériaux ============ */

.materials {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1.2rem;
}

.material {
  background: var(--fond-alt);
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
  padding: 1.2rem 1.3rem;
  transition: transform var(--transition), box-shadow var(--transition);
}

.material:hover { transform: translateY(-3px); box-shadow: var(--ombre); }

.material h3 {
  color: var(--bleu);
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
}

.material p { font-size: 0.88rem; color: var(--texte-doux); }

/* ============ Réalisations ============ */

.realisation-img {
  width: calc(100% + 3.6rem);
  max-width: none;
  margin: -1.8rem -1.8rem 1.2rem;
  height: 190px;
  object-fit: cover;
  object-position: center;
  border-radius: var(--rayon) var(--rayon) 0 0;
  display: block;
}

.realisation { position: relative; }
.photo-count {
  position: absolute; top: 0.7rem; right: 0.7rem;
  display: inline-flex; align-items: center; gap: 0.25rem;
  background: rgba(13, 43, 71, 0.72); color: #fff;
  font-size: 0.76rem; font-weight: 600;
  padding: 0.16rem 0.55rem; border-radius: 999px;
  -webkit-backdrop-filter: blur(2px); backdrop-filter: blur(2px);
  pointer-events: none; z-index: 2;
}
.realisation h3 { margin-top: 0.2rem; }
.realisation p { font-size: 0.95rem; }

/* ============ Étiquettes ============ */

.audience-tags { margin-top: 0.9rem; display: flex; gap: 0.4rem; flex-wrap: wrap; }

.tag {
  display: inline-block;
  background: rgba(20, 184, 166, 0.1);
  color: var(--turquoise-fonce);
  border: 1px solid rgba(20, 184, 166, 0.3);
  border-radius: 999px;
  padding: 0.15rem 0.7rem;
  font-size: 0.8rem;
  font-weight: 600;
}

/* ============ Cartes cliquables + visionneuse ============ */

.clickable-card { cursor: zoom-in; }

.clickable-card .realisation-img,
.clickable-card .product-logo { transition: transform var(--transition); }

.clickable-card:hover .realisation-img { transform: scale(1.03); }

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background: rgba(8, 26, 43, 0.88);
  backdrop-filter: blur(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease;
}

.lightbox.open { opacity: 1; pointer-events: auto; }

.lightbox-img {
  max-width: 92vw;
  max-height: 82vh;
  border-radius: 10px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.55);
}

.lightbox-caption {
  position: absolute;
  bottom: 1.3rem;
  left: 0;
  right: 0;
  text-align: center;
  color: #fff;
  font-size: 0.98rem;
  padding: 0 1.5rem;
}

.lightbox-close {
  position: absolute;
  top: 1rem;
  right: 1.2rem;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
  font-size: 1.6rem;
  line-height: 1;
  cursor: pointer;
  transition: background var(--transition);
}

.lightbox-close:hover { background: rgba(255, 255, 255, 0.32); }

.lightbox-nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 52px; height: 52px; border: none; border-radius: 50%;
  background: rgba(255, 255, 255, 0.14); color: #fff;
  font-size: 2rem; line-height: 1; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition);
}
.lightbox-nav:hover { background: rgba(255, 255, 255, 0.3); }
.lightbox-prev { left: 1rem; }
.lightbox-next { right: 1rem; }

/* ============ Pages de contenu (mentions légales…) ============ */

main.section h2 {
  color: var(--encre);
  font-size: 1.2rem;
  margin: 1.8rem 0 0.5rem;
}

/* ============ Responsive ============ */

@media (max-width: 1000px) {
  .cards-4col { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .materials { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 640px) {
  .cards-4col, .steps, .materials { grid-template-columns: 1fr; }

  /* Espacements resserrés sur mobile */
  .section { padding-block: 3rem; }
  .section-title { margin-bottom: 1.6rem; }

  /* Boutons d'action pleine largeur (zone de tap confortable) */
  .hero-actions { gap: 0.7rem; }
  .hero-actions .btn { flex: 1 1 100%; text-align: center; }
  .section-contact .btn-lg { display: block; width: 100%; box-sizing: border-box; text-align: center; }

  /* Pied de page centré */
  .footer-inner { justify-content: center; text-align: center; }
}

@media (max-width: 1024px) {
  .nav-toggle { display: flex; }

  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--blanc);
    border-bottom: 1px solid var(--bordure);
    box-shadow: var(--ombre);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .main-nav.open { max-height: 22rem; }

  .main-nav a {
    width: 100%;
    padding: 0.9rem 1.4rem;
    border-top: 1px solid var(--bordure);
  }

  .btn-nav { border-radius: 0; text-align: center; }

  .hero { padding-block: 3.5rem 3rem; }
}

/* ===== Études de cas ===== */
.cs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}
.cs-card {
  display: flex;
  flex-direction: column;
  background: var(--fond);
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 2px 10px rgba(13, 59, 92, 0.05);
  transition: transform var(--transition), box-shadow var(--transition);
}
.cs-card:hover { transform: translateY(-4px); box-shadow: var(--ombre); }
.cs-card-img {
  width: 100%;
  height: 170px;
  object-fit: cover;
  display: block;
  background: var(--fond-alt);
}
.cs-card-noimg {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.6rem;
  color: var(--turquoise);
  background: linear-gradient(135deg, #eef6fa, #e6f7f4);
}
.cs-card-body { padding: 1.2rem 1.3rem 1.4rem; display: flex; flex-direction: column; flex: 1; }
.cs-card-meta {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--turquoise-fonce);
  font-weight: 600;
  margin-bottom: 0.35rem;
}
.cs-card-body h3 { color: var(--encre); font-size: 1.12rem; margin-bottom: 0.45rem; line-height: 1.3; }
.cs-card-sum { color: var(--texte-doux); font-size: 0.92rem; margin-bottom: 0.9rem; }
.cs-card-more { margin-top: auto; font-weight: 600; color: var(--bleu); font-size: 0.9rem; }
.cs-card:hover .cs-card-more { color: var(--turquoise-fonce); }

/* ---- Page de détail d'une étude de cas ---- */
.cs-detail { max-width: 46rem; }
.cs-back { margin-bottom: 1.4rem; }
.cs-back a { color: var(--texte-doux); text-decoration: none; font-size: 0.92rem; }
.cs-back a:hover { color: var(--turquoise-fonce); }
.cs-detail-pole {
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--turquoise-fonce);
  margin-bottom: 0.5rem;
}
.cs-detail-title { color: var(--encre); font-size: clamp(1.7rem, 4vw, 2.4rem); line-height: 1.15; margin-bottom: 0.6rem; }
.cs-detail-meta { color: var(--texte-doux); font-size: 0.95rem; margin-bottom: 1.4rem; }
.cs-detail-lead { font-size: 1.15rem; color: var(--texte); line-height: 1.6; margin-bottom: 1.8rem; }
.cs-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.8rem;
  margin-bottom: 2rem;
}
.cs-gallery-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 10px;
  border: 1px solid var(--bordure);
  cursor: zoom-in;
  transition: transform var(--transition);
}
.cs-gallery-img:hover { transform: scale(1.02); }
.cs-block { margin-bottom: 1.8rem; }
.cs-block h2 {
  color: var(--encre);
  font-size: 1.25rem;
  margin-bottom: 0.6rem;
  padding-left: 0.7rem;
  border-left: 3px solid var(--turquoise);
}
.cs-block p { color: var(--texte); line-height: 1.7; margin-bottom: 0.8rem; }
.cs-detail-cta { margin-top: 2.4rem; }

@media (max-width: 640px) {
  .cs-gallery-img { height: 160px; }
}