:root {
            --primary: #cc135d;          /* Magenta GITS */
            --primary-soft: #fbe5ef;
            --dark: #1f1f26;
            --text: #333333;
            --muted: #777777;
            --bg: #f4f5f8;
            --white: #ffffff;
            --border-soft: #e2e4ea;
            --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.12);
            --radius-lg: 18px;
            --radius-xl: 26px;
            --transition-fast: 0.2s ease-out;
            --max-width: 1200px;
            --block-bg-soft: #f8f7fb;
            --block-bg-alt: #ffffff;
        }

        * {
            box-sizing: border-box;
        }

        html, body {
            margin: 0;
            padding: 0;
            font-family: "Poppins", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            color: var(--text);
            background: var(--bg);
        }

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

        a {
            color: inherit;
            text-decoration: none;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* --- SHELL --- */

        .site-shell {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 80px;
            min-height: 100vh;
        }
.site-main {
            background: linear-gradient(180deg, #ffffff 0%, #f6f7fb 65%, #eef0f6 100%);
            min-height: 100vh;
              grid-column: 1/2;
        }
        /* Barre verticale à droite (tu as déjà le background) */
.shell-rail {
    grid-column: 2;
    background: var(--primary);
    min-height: 100vh;
    position: sticky;
    top: 0;
    display: flex;
}

/* Conteneur interne : split 70% / 30% en colonne */
.rail-inner {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100%;
    padding: 16px 0;
}

/* Zone texte (70%) */
.rail-top {
    flex: 7 1 0; /* 70% environ */
    display: flex;
    align-items: center;
    justify-content: center;
    writing-mode: vertical-rl;      /* texte vertical */
    text-orientation: mixed;
    gap: 10px;
    color: #ffffff;
    font-size: 11px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

/* Zone icônes (30%) */
.rail-bottom {
    z-index: 1000;
    flex: 3 1 0; /* 30% environ */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    gap: 12px;
    padding-bottom: 8px;
}

/* Style de base des icônes socials */
.rail-icon {
    width: 28px;
    height: 28px;
    border-radius: 999px;
    border: 1px solid rgba(255,255,255,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    color: #ffffff;
    text-decoration: none;
    transition: background 0.2s ease-out, transform 0.2s ease-out, border-color 0.2s ease-out;
}

.rail-icon:hover {
    background: #ffffff;
    color: var(--primary);
    border-color: #ffffff;
    transform: translateY(-2px);
}


        .shell-rail::before {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 20% 15%, rgba(255,255,255,0.18), transparent 55%);
            opacity: 0.7;
        }

        

        /* --- HEADER --- */

        header.site-header {
            position: sticky;
            top: 0;
            z-index: 20;
            backdrop-filter: blur(20px);
            background: rgba(255,255,255,0.92);
            border-bottom: 1px solid rgba(15,23,42,0.04);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 24px;
        }

        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .logo-wrap img {
            height: 38px;
        }

        .logo-tagline {
            font-size: 11px;
            line-height: 1.4;
            text-transform: uppercase;
            letter-spacing: 0.12em;
            color: var(--muted);
        }

        nav.main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
            font-size: 13px;
            text-transform: uppercase;
            letter-spacing: 0.12em;
        }

        .main-nav a {
            position: relative;
            padding-bottom: 4px;
            color: #555;
            font-weight: 500;
        }

        .main-nav a::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: width var(--transition-fast);
        }

        .main-nav a:hover::after {
            width: 100%;
        }

        .main-nav .lang-switch {
            padding-left: 18px;
            border-left: 1px solid rgba(148,163,184,0.4);
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
        }

        .lang-switch span {
            opacity: 0.5;
            cursor: pointer;
        }
        .lang-switch span.active {
            opacity: 1;
            font-weight: 600;
            color: var(--primary);
        }

        /* --- HERO --- */

        .hero {
            position: relative;
            min-height: calc(100vh - 72px);
            display: flex;
            align-items: stretch;
            padding: 48px 0 64px;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background: url("bg.jpg") center center / cover no-repeat;
            z-index: 0;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 15% 15%, rgba(255,255,255,0.32), transparent 52%),
                        linear-gradient(90deg, rgba(10,10,15,0.82) 0%, rgba(15,23,42,0.75) 30%, rgba(15,23,42,0.3) 70%, rgba(15,23,42,0.18) 100%);
            z-index: 1;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: minmax(0, 1fr) 35%;
            align-items: center;
            gap: 32px;
        }

        .hero-kicker {
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 0.18em;
            color: var(--primary-soft);
            font-weight: 600;
            margin-bottom: 12px;
        }

        .hero-title {
            font-size: clamp(32px, 4vw, 42px);
            line-height: 1.15;
            color: #ffffff;
            margin: 0 0 16px;
        }

        .hero-subtitle {
            font-size: 15px;
            max-width: 620px;
            color: rgba(248,250,252,0.82);
            line-height: 1.7;
            margin-bottom: 26px;
        }

        .hero-pills {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 24px;
        }

        .hero-pill {
            padding: 6px 12px;
            border-radius: 999px;
            border: 1px solid rgba(248,250,252,0.35);
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 0.12em;
            color: #e5e7eb;
        }

        .btn-row {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 24px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            border: 1px solid transparent;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .btn-primary {
            background: var(--primary);
            border-color: var(--primary);
            color: #ffffff;
            box-shadow: 0 14px 30px rgba(204,19,93,0.35);
        }

        .btn-primary:hover {
            transform: translateY(-1px);
            box-shadow: 0 20px 45px rgba(15,23,42,0.35);
        }

        .btn-ghost {
            background: transparent;
            color: #e5e7eb;
            border-color: rgba(148,163,184,0.55);
        }

        .btn-ghost:hover {
            border-color: #e5e7eb;
            background: rgba(15,23,42,0.35);
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            font-size: 12px;
            color: rgba(226,232,240,0.85);
        }

        .hero-meta span::before {
            content: "•";
            margin-right: 6px;
            color: var(--primary-soft);
        }

        /* --- GENERIC SECTIONS --- */

        section {
            padding: 56px 0;
        }

        .section-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            gap: 24px;
            margin-bottom: 26px;
        }

        .section-kicker {
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 0.16em;
            color: var(--primary);
            margin-bottom: 6px;
        }

        .section-title {
            font-size: 26px;
            margin: 0;
            color: var(--dark);
        }

        .section-lead {
            font-size: 14px;
            color: var(--muted);
            max-width: 460px;
            line-height: 1.7;
        }

        /* --- EXPERTISES --- */

        .expertise-grid {
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 18px;
        }

        .expertise-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-soft);
            padding: 14px 14px 18px;
            box-shadow: 0 10px 25px rgba(15,23,42,0.04);
            display: flex;
            flex-direction: column;
            gap: 10px;
            transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
        }

        .expertise-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 18px 40px rgba(15,23,42,0.12);
            border-color: rgba(204,19,93,0.55);
        }

        .expertise-media {
            width: 100%;
            height: 200px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(204,19,93,0.12), rgba(15,23,42,0.06));
            border: 1px dashed rgba(148,163,184,0.7);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
            color: rgba(100,116,139,0.9);
            text-transform: uppercase;
            letter-spacing: 0.12em;
            overflow: hidden;
        }

        
        .expertise-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

.expertise-tag {
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 0.14em;
            color: var(--primary);
        }

        .expertise-title {
            font-size: 16px;
            font-weight: 600;
            margin: 2px 0 4px;
        }

        .expertise-body {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.6;
            flex: 1;
        }

        .expertise-link {
            font-size: 12px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 6px;
            color: var(--primary);
            font-weight: 500;
        }

        .expertise-link::after {
            content: "↗";
            font-size: 11px;
        }

        /* --- SECTION TYPES AVEC VARIATIONS DE FOND --- */

        .section-soft {
            background: var(--block-bg-soft);
        }

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

        .section-block {
            padding: 48px 0;
        }

        .section-split {
            display: grid;
            grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.9fr);
            gap: 32px;
            align-items: center;
        }

        .section-media-placeholder {
            width: 100%;
            min-height: 180px;
            border-radius: var(--radius-lg);
            background: #ffffff;
            border: 1px dashed rgba(148,163,184,0.8);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 0.12em;
            color: rgba(100,116,139,0.9);
            overflow: hidden;
        }

        /* --- LISTS / PILLS / VALEURS --- */

        .pill-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 10px;
        }

        .pill {
            font-size: 12px;
            padding: 6px 12px;
            border-radius: 999px;
            background: #ffffff;
            border: 1px solid var(--border-soft);
        }

        .value-list {
            list-style: none;
            margin: 0;
            padding: 0;
            display: grid;
            gap: 12px;
        }

        .value-item-title {
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 2px;
        }

        .value-item-text {
            font-size: 13px;
            color: var(--muted);
        }

        /* --- NOUVELLE CHAÎNE SECTION --- */

        .chaine-highlight {
            border-radius: var(--radius-xl);
            border: 1px solid rgba(148,163,184,0.4);
            box-shadow: 0 14px 40px rgba(15,23,42,0.12);
            padding: 26px 26px 24px;
            background: radial-gradient(circle at top left, rgba(204,19,93,0.17), transparent 55%), #0b1220;
            color: #e5e7eb;
        }

        .chaine-tag {
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 0.16em;
            color: var(--primary-soft);
            margin-bottom: 6px;
        }

        .chaine-title {
            font-size: 20px;
            margin: 0 0 10px;
        }

        .chaine-body {
            font-size: 13px;
            line-height: 1.7;
            color: rgba(226,232,240,0.94);
            margin-bottom: 14px;
        }

        .chaine-list {
            list-style: none;
            padding: 0;
            margin: 0 0 12px;
            font-size: 13px;
            display: grid;
            gap: 6px;
        }

        .chaine-list li::before {
            content: "▹";
            margin-right: 6px;
            color: var(--primary-soft);
        }

        /* --- REFERENCES & CTA --- */

        .refs-strip {
            background: #ffffff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-soft);
            padding: 18px 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 18px;
            box-shadow: 0 8px 20px rgba(15,23,42,0.06);
            flex-wrap: wrap;
        }

        .refs-text {
            font-size: 13px;
            color: var(--muted);
            max-width: 520px;
        }

        .refs-kpi-row {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 13px;
        }

        .refs-kpi span strong {
            display: block;
            font-size: 18px;
            color: var(--dark);
        }

        .cta-contact {
            margin-top: 16px;
            background: linear-gradient(120deg, var(--primary) 0%, #f97316 110%);
            border-radius: var(--radius-xl);
            padding: 26px 26px 24px;
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            flex-wrap: wrap;
        }

        .cta-contact h3 {
            margin: 0 0 4px;
            font-size: 18px;
        }

        .cta-contact p {
            margin: 0;
            font-size: 13px;
            opacity: 0.92;
        }

        .cta-contact .btn {
            border-color: rgba(255,255,255,0.85);
            background: #ffffff;
            color: var(--primary);
            box-shadow: 0 15px 35px rgba(15,23,42,0.25);
        }

        .cta-contact .btn:hover {
            transform: translateY(-1px);
        }

        footer {
            padding: 26px 24px 22px;
            font-size: 12px;
            color: #94a3b8;
        }

        footer .footer-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        /* --- RESPONSIVE --- */

        @media (max-width: 1024px) {
            .site-shell {
                grid-template-columns: 1fr;
            }

            .site-main {
                grid-column: auto;
            }

            .shell-rail {
                display: none;
            }

            .expertise-grid {
                grid-template-columns: repeat(2, minmax(0, 1fr));
            }

            .section-split {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            header.site-header {
                position: sticky;
                top: 0;
                z-index: 50;
            }

            .header-inner {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }

            nav.main-nav {
                width: 100%;
                flex-wrap: nowrap;
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
                gap: 16px;
                padding-bottom: 6px;
            }

            .hero {
                padding-top: 32px;
                padding-bottom: 40px;
            }

            .hero-subtitle {
                max-width: none;
            }

            .expertise-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 900px) {
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 22px;
            }

            .hero {
                min-height: auto;
                padding: 32px 0 40px;
            }

            .hero-title {
                font-size: clamp(26px, 6vw, 36px);
            }

            .btn-row {
                gap: 10px;
            }

            .btn {
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 480px) {
            .container {
                padding: 0 16px;
            }

            section {
                padding: 42px 0;
            }

            .section-header {
                align-items: flex-start;
                flex-direction: column;
            }

            .refs-strip {
                padding: 16px;
            }
        }




/* =========================
   MOBILE NAV + OVERFLOW FIX
   ========================= */
html, body { max-width: 100%; overflow-x: hidden; }
*, *::before, *::after { box-sizing: border-box; }
img { max-width: 100%; height: auto; }

.site-shell > *, .hero-inner > * { min-width: 0; }

/* Burger button (hidden on desktop) */
.nav-toggle {
  display: none;
  appearance: none;
  border: 1px solid rgba(15, 23, 42, 0.14);
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(10px);
  border-radius: 999px;
  padding: 10px 12px;
  gap: 6px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  background: rgba(15, 23, 42, 0.82);
  border-radius: 999px;
}

/* Mobile nav drawer */
.mobile-nav {
  display: none; /* desktop */
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.40);
  z-index: 9999;
  padding: 84px 16px 16px; /* leave room for header */
}

.mobile-nav-inner {
  background: rgba(255,255,255,0.98);
  border: 1px solid rgba(15, 23, 42, 0.10);
  border-radius: 18px;
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.18);
  padding: 14px;
  max-width: 520px;
  margin: 0 auto;
}

.mobile-nav-link {
  display: block;
  padding: 12px 12px;
  border-radius: 12px;
  text-decoration: none;
  color: rgba(15, 23, 42, 0.92);
  font-weight: 600;
}

.mobile-nav-link:hover {
  background: rgba(15, 23, 42, 0.06);
}

.mobile-lang-switch {
  display: flex;
  gap: 10px;
  padding: 10px 6px 2px;
}

.lang-pill {
  border: 1px solid rgba(15, 23, 42, 0.14);
  background: rgba(15, 23, 42, 0.03);
  border-radius: 999px;
  padding: 8px 12px;
  font-weight: 700;
  cursor: pointer;
}

.lang-pill.active {
  border-color: rgba(204, 19, 93, 0.35);
  background: rgba(204, 19, 93, 0.10);
  color: var(--primary);
}

/* Mobile behavior */
@media (max-width: 768px) {
  .nav-toggle { display: inline-flex; }

  /* Hide desktop nav on mobile */
  .main-nav { display: none; }

  /* Keep header layout clean */
  .header-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
  }

  .logo-wrap img { height: 26px; width: auto; }

  body.nav-open .mobile-nav { display: block; }
  body.nav-open { overflow: hidden; } /* lock background scroll */
}