:root {
            --color-vert-fonce: #29543F;
            --color-vert-clair: #4E8A68;
            --color-rouge: #C81D25;
            --color-rouge-hover: #a6151b;
            --color-blanc: #ffffff;
            --color-gris-fond: #f4f7f5;
            --color-gris-texte: #4a5568;
            --color-titre: #1a202c;
            
            --font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
            --radius-premium: 14px;
            --shadow-premium: 0 10px 30px rgba(41, 84, 63, 0.08);
            --shadow-button: 0 6px 25px rgba(200, 29, 37, 0.3);
            --shadow-button-hover: 0 12px 35px rgba(200, 29, 37, 0.45);
            --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: var(--font-main);
            color: var(--color-gris-texte);
            background-color: var(--color-blanc);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            width: 100%;
            padding: 0.75rem 1.5rem;
            min-height: 91px;
            background-color: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(41, 84, 63, 0.06);
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1200px;
            width: 100%;
        }

        .logo-wrapper {
            width: 200px;
            height: 67px;
            display: flex;
            align-items: center;
        }

        .logo-img {
            width: 100%;
            height: auto;
            aspect-ratio: 200 / 67;
            object-fit: contain;
        }

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

        .nav-list {
            display: flex;
            list-style: none;
            gap: 1.5rem;
            align-items: center;
        }

        .nav-list a {
            text-decoration: none;
            color: var(--color-vert-fonce);
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition-smooth);
            padding: 0.5rem 0.8rem;
            border-radius: 8px;
        }

        .nav-list a:hover {
            color: var(--color-rouge);
            background-color: rgba(41, 84, 63, 0.04);
        }

        .nav-list .nav-highlight {
            color: var(--color-rouge);
            border: 1px solid rgba(200, 29, 37, 0.2);
        }
        
        .nav-list .nav-highlight:hover {
            background-color: rgba(200, 29, 37, 0.05);
            color: var(--color-rouge-hover);
        }

        .btn-nav {
            background-color: var(--color-vert-fonce) !important;
            color: var(--color-blanc) !important;
            padding: 0.6rem 1.2rem !important;
            border-radius: var(--radius-premium);
            font-size: 0.9rem !important;
            box-shadow: 0 4px 15px rgba(41, 84, 63, 0.15);
        }

        .btn-nav:hover {
            background-color: var(--color-vert-clair) !important;
            transform: translateY(-1px);
        }

        @media (max-width: 900px) {
            .main-nav {
                display: none;
            }
            .header-container {
                justify-content: center;
            }
        }

        .hero {
            position: relative;
            height: 100vh;
            height: 100svh;
            min-height: 600px;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 0 1.5rem;
            background:
                linear-gradient(
                    rgba(41, 84, 63, 0.50),
                    rgba(20, 43, 32, 0.60)
                ),
                url('images/hero.webp') no-repeat center center / cover;
            color: var(--color-blanc);
            text-align: center;
        }

        .hero-content {
            max-width: 1000px;
            z-index: 2;
        }

        .hero h1 {
            color: var(--color-blanc);
            font-size: clamp(2.5rem, 6vw, 4.5rem);
            margin-bottom: 1.5rem;
            letter-spacing: -1.5px;
            font-weight: 800;
            line-height: 1.15;
        }

        .hero-subtitle {
            font-size: clamp(1.1rem, 2vw, 1.4rem);
            margin-bottom: 3.5rem;
            font-weight: 300;
            opacity: 0.95;
            letter-spacing: 0.5px;
        }

        .hero-subtitle span {
            display: inline-block;
        }

        .hero-subtitle .separator {
            color: var(--color-rouge);
            font-weight: 700;
            margin: 0 10px;
        }

        .btn-principal {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--color-rouge);
            color: var(--color-blanc);
            text-decoration: none;
            padding: 1.25rem 3rem;
            font-weight: 700;
            font-size: 1.1rem;
            letter-spacing: 0.5px;
            border-radius: var(--radius-premium);
            box-shadow: var(--shadow-button);
            transition: var(--transition-smooth);
            border: none;
            cursor: pointer;
            animation: pulse-subtle 3s infinite;
        }

        .btn-principal:hover, .btn-principal:focus {
            background-color: var(--color-rouge-hover);
            transform: scale(1.04) translateY(-2px);
            box-shadow: var(--shadow-button-hover);
            outline: none;
        }

        .btn-principal svg {
            margin-right: 12px;
            transition: transform 0.3s ease;
        }

        .btn-principal:hover svg {
            transform: rotate(-10deg) scale(1.1);
        }

        section {
            padding: 7rem 1.5rem;
        }

        .section-title {
            font-size: 2.4rem;
            text-align: center;
            margin-bottom: 3.5rem;
            color: var(--color-vert-fonce);
            font-weight: 700;
            letter-spacing: -0.5px;
        }

        .section-title::after {
            content: '';
            display: block;
            width: 50px;
            height: 3px;
            background-color: var(--color-rouge);
            margin: 1rem auto 0;
            border-radius: 2px;
        }

        .reveal {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        .section-presentation {
            max-width: 900px;
            margin: 0 auto;
            text-align: center;
        }

        .phrase-mise-en-avant {
            font-size: 1.6rem;
            color: var(--color-titre);
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 2rem;
        }

        .badge-container {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-vert-clair);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 4rem;
        }

        .bloc-coeur {
            background-color: var(--color-gris-fond);
            padding: 3rem;
            border-radius: var(--radius-premium);
            text-align: left;
            margin-top: 3rem;
            border-left: 5px solid var(--color-vert-fonce);
        }

        .bloc-coeur h3 {
            color: var(--color-vert-fonce);
            margin-bottom: 1rem;
            font-size: 1.4rem;
        }

        .geo-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            margin-top: 4rem;
        }

        .geo-card {
            background: var(--color-gris-fond);
            padding: 1.5rem;
            border-radius: var(--radius-premium);
            font-weight: 600;
            color: var(--color-vert-fonce);
        }

        .section-engagements {
            background-color: var(--color-gris-fond);
        }

        .engagements-container {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2.5rem;
        }

        .card-engagement {
            background: var(--color-blanc);
            padding: 4rem 2.5rem;
            border-radius: var(--radius-premium);
            box-shadow: var(--shadow-premium);
            transition: var(--transition-smooth);
            text-align: center;
        }

        .card-engagement:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 40px rgba(41, 84, 63, 0.12);
        }

        .card-icon {
            font-size: 2.5rem;
            margin-bottom: 1.5rem;
            display: block;
        }

        .card-engagement h3 {
            font-size: 1.4rem;
            margin-bottom: 1rem;
            color: var(--color-vert-fonce);
        }

        .bureau-container {
            max-width: 1100px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

        .card-bureau {
            border: 1px solid rgba(41, 84, 63, 0.12);
            padding: 2.5rem 2rem;
            border-radius: var(--radius-premium);
            text-align: center;
        }

        .card-bureau h3 {
            color: var(--color-vert-fonce);
            font-size: 1.3rem;
            margin-bottom: 0.5rem;
        }

        .card-bureau p {
            font-size: 0.95rem;
            color: var(--color-gris-texte);
        }

        .bureau-note {
            text-align: center;
            margin-top: 3.5rem;
            font-style: italic;
            font-weight: 500;
        }

        .section-contact {
            background-color: var(--color-vert-fonce);
            color: var(--color-blanc);
        }

        .section-contact .section-title {
            color: var(--color-blanc);
        }

        .section-contact .section-title::after {
            background-color: var(--color-blanc);
        }

        .contact-inline-bar {
            max-width: 1000px;
            margin: 0 auto;
            display: flex;
            justify-content: space-around;
            align-items: center;
            flex-wrap: wrap;
            gap: 2rem;
        }

        .contact-inline-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.2rem;
            font-weight: 600;
        }

        .contact-inline-item .email-brut {
            font-family: monospace;
            background: rgba(255, 255, 255, 0.12);
            padding: 4px 10px;
            border-radius: 6px;
            font-size: 1.1rem;
            user-select: all;
        }

        .contact-inline-item a {
            color: var(--color-blanc);
            text-decoration: none;
            border-bottom: 1px dashed rgba(255,255,255,0.5);
            transition: opacity 0.2s;
        }

        .contact-inline-item a:hover {
            opacity: 0.8;
        }

        .site-footer {
            background-color: #14281e;
            color: #e2e8f0;
            padding: 4rem 1.5rem;
            font-size: 0.9rem;
            text-align: center;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .footer-container {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
            align-items: center;
        }

        .footer-identity {
            font-weight: 700;
            color: var(--color-blanc);
            font-size: 1.1rem;
        }

        .mentions-legales {
            font-size: 0.75rem;
            line-height: 1.6;
            color: #cbd5e1;
        }

        @keyframes pulse-subtle {
            0% { transform: scale(1); }
            50% { transform: scale(1.02); }
            100% { transform: scale(1); }
        }

        @media (max-width: 1024px) {
            .engagements-container, .bureau-container {
                grid-template-columns: repeat(2, 1fr);
            }
            .geo-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .engagements-container, .bureau-container, .geo-grid {
                grid-template-columns: 1fr;
            }
            .contact-inline-bar {
                flex-direction: column;
                align-items: flex-start;
                max-width: 320px;
                margin: 0 auto;
            }
            .hero h1 {
                font-size: 2.4rem;
            }
        }