*{
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            transition: background-color 0.5s, color 0.3s, border-color 0.3s;
        }
        
        body {
            line-height: 1.6;
        }
        
        body.light-mode {
            background-color: #ffffff;
            color: #173f4a;
        }
        
        .container {
            width: 90%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
        /* Bouton toggle */
        .theme-toggle {
            position: fixed;
            top: 90px;
            right: 20px;
            z-index: 1000;
            background: #c4c4c4ff;
            color: #e3f9fb;
            border: none;
            border-radius: 50%;
            width: 50px;
            height: 50px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
        }
        
        .light-mode .theme-toggle {
            background: #6e96a1;
            color: #041b22ff;
        }
        
        /* Header */
        header {
            background-color: #275f6e;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
        }
         header img {
      height: 60px; 
      margin-right: 15px;
      align-items: right;
    }

        
        .light-mode header {
            background-color: #c2d8ddff;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }
        
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        
        .logo {
            font-size: 28px;
            font-weight: bold;
            color: #e3f9fb;
            position: right;
        }
        
        .light-mode .logo {
            color: #173f4a;
        }
        
        .logo span {
            display: block;
            font-size: 16px;
            font-weight: normal;
            color: #6e96a1;
        }
        
        .light-mode .logo span {
            color: #010f1f;
        }
        
        nav ul {
            display: flex;
            list-style: none;
        }
        
        nav ul li {
            margin-left: 25px;
        }
        
        nav ul li a {
            text-decoration: none;
            color: #cddee0;
            font-weight: 500;
            transition: color 0.3s;
            padding: 5px 10px;
            border-radius: 4px;
        }
        
        .light-mode nav ul li a {
            color: #010f1f;
        }
        
        nav ul li a:hover {
            color: #e3f9fb;
            background-color: #6e848aff;
        }
        
        .light-mode nav ul li a:hover {
            color: #04151a;
            background-color: #cddee0;
        }
        
        /* Sections générales */
        section {
            padding: 100px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        
        .section-title h2 {
            font-size: 36px;
            margin-bottom: 15px;
            color: #e3f9fb;
            position: relative;
            display: inline-block;
        }
        
        .light-mode .section-title h2 {
            color: #173f4a;
        }
        
        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background-color: #010f1f;
        }
        
        .light-mode .section-title h2::after {
            background-color: #6e96a1;
        }

        .section-title h3 {
            font-size: 36px;
            margin-bottom: 15px;
            color: #44767aff;
            position: relative;
            display: inline-block;
        }
        
        .light-mode .section-title h3 {
            color: #325f6cff;
        }
        
        .section-title h3::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background-color: #010f1f;
        }
        
        .light-mode .section-title h3::after {
            background-color: #6e96a1;
        }
        
        /* Hero Section */
        .hero {
            background: linear-gradient(rgba(39, 95, 110, 0.8), rgba(4, 21, 26, 0.9)), url('https://images.unsplash.com/photo-1505693416388-ac5ce068fe85?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') no-repeat center center/cover;
            color: #e3f9fb;
            text-align: center;
            padding: 200px 0 120px;
            margin-top: 70px;
        }
        
        .light-mode .hero {
            background: linear-gradient(rgba(240, 247, 249, 0.8), rgba(240, 247, 249, 0.9)), url('https://images.unsplash.com/photo-1505693416388-ac5ce068fe85?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') no-repeat center center/cover;
            color: #173f4a;
        }
        
        .hero h1 {
            font-size: 52px;
            margin-bottom: 20px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
        }
        
        .light-mode .hero h1 {
            text-shadow: 2px 2px 4px rgba(255, 255, 255, 0.5);
        }
        
        .hero p {
            font-size: 22px;
            margin-bottom: 40px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .btn {
            display: inline-block;
            background: #010f1f;
            color: #e3f9fb;
            padding: 14px 35px;
            border-radius: 30px;
            text-decoration: none;
            font-weight: bold;
            transition: all 0.3s;
            border: 2px solid #010f1f;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        
        .light-mode .btn {
            background: #6e96a1;
            color: #04151a;
            border-color: #6e96a1;
        }
        
        .btn:hover {
            background: transparent;
            color: #e3f9fb;
            border-color: #6e96a1;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
        }
        
        .light-mode .btn:hover {
            color: #173f4a;
            border-color: #010f1f;
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }
        
        /* About Section */
        .about {
            background-color: #275f6e;
        }
        
        .light-mode .about {
            background-color: #ffffff;
        }
        
        .about-content {
            display: flex;
            align-items: center;
            gap: 50px;
        }
        
        .about-text {
            flex: 1;
        }
        
        .about-text h3 {
            font-size: 28px;
            margin-bottom: 20px;
            color: #e3f9fb;
        }
        
        .light-mode .about-text h3 {
            color: #173f4a;
        }
        
        .about-text p {
            margin-bottom: 20px;
            color: #cddee0;
        }
        
        .light-mode .about-text p {
            color: #010f1f;
        }
        
        .about-image {
            flex: 1;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
        }
        
        .light-mode .about-image {
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .about-image img {
            width: 100%;
            height: auto;
            display: block;
        }
        
        /* Solutions Section */

        .solutions {
            background-color: #d1e2e7ff;
        }
        
        .light-mode .solutions {
            background-color: #c2d8ddff;
        }
        
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }
        
        .solution-card {
            background: linear-gradient(145deg, #275f6e, #3c5056ff);
            padding: 40px 30px;
            border-radius: 10px;
            text-align: center;
            transition: all 0.3s;
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
            border: 1px solid #010f1f;
        }
        
        .light-mode .solution-card {
            background: linear-gradient(145deg, #ffffff, #cddee0);
            border: 1px solid #6e96a1;
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
            
        }
        
        .solution-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
            border-color: #6e96a1;
        }
        
        .light-mode .solution-card:hover {
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
            border-color: #010f1f;
        }
        
        .solution-card h3 {
            margin-bottom: 20px;
            color: #e3f9fb;
            font-size: 24px;
        }
        
        .light-mode .solution-card h3 {
            color: #173f4a;
        }
        
        .solution-card p {
            color: #cddee0;
        }
        
        .light-mode .solution-card p {
            color: #010f1f;
        }
        
        .light-mode .cta-link {
            display: inline-block;
            margin-top: 1rem;
            padding: 0.6rem 1.2rem;
            background: #2b6777; /* bleu/vert principal */
            color: #fff;
            font-weight: bold;
            border-radius: 6px;
            text-decoration: none;
            transition: background 0.3s ease, transform 0.2s ease;
            align-self: flex-start;
        }

        .light-mode .cta-link:hover {
            background: #1e4c5a; /* variante plus foncée */
            transform: scale(1.05);
        }
        
        .cta-link {
            display: inline-block;
            margin-top: 1rem;
            padding: 0.6rem 1.2rem;
            background: #fff;
            color: #2b6777;
            font-weight: bold;
            border-radius: 6px;
            text-decoration: none;
            transition: background 0.3s ease, transform 0.2s ease;
            align-self: flex-start;
        }

        .cta-link:hover {
            background: #e3f9fb; 
            transform: scale(1.05);
        }
        
        /* Pricing Section */
        .pricing {
            background-color: #275f6e;
        }
        
        .light-mode .pricing {
            background-color: #ffffff;
        }
        
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 40px;
        }
        
        .pricing-card {
            background: linear-gradient(to bottom, #367181ff, #4f6a75ff);
            border: 2px solid #010f1f;
            border-radius: 15px;
            padding: 50px 40px;
            text-align: center;
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
            transition: all 0.3s;
        }
        
        .light-mode .pricing-card {
            background: linear-gradient(to bottom, #ffffff, #cddee0);
            border: 2px solid #6e96a1;
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .pricing-card:hover {
            transform: translateY(-10px);
            border-color: #6e96a1;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
        }
        
        .light-mode .pricing-card:hover {
            border-color: #010f1f;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
        }
        
        .pricing-card h3 {
            font-size: 28px;
            margin-bottom: 25px;
            color: #e3f9fb;
        }
        
        .light-mode .pricing-card h3 {
            color: #173f4a;
        }
        
        .price {
            font-size: 32px;
            font-weight: bold;
            color: #010f1f;
            margin-bottom: 10px;
            background-color: #ffffffff;
            padding: 8px;
            border-radius: 8px;
        }
        
        .light-mode .price {
            color: #04151a;
            background-color: #6e96a1;
        }
        
        .features {
            list-style: none;
            margin-bottom: 35px;
        }
        
        .features li {
            padding: 12px 0;
            border-bottom: 1px solid #010f1f;
            color: #cddee0;
        }
        
        .light-mode .features li {
            border-bottom: 1px solid #6e96a1;
            color: #010f1f;
        }
        
        /* Contact Section */
        .contact {
            background-color: #d1e2e7ff;
        }
        
        .light-mode .contact {
            background-color: #c2d8ddff;
        }
        
        .contact-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 50px;
        }
        
        .contact-form {
            background: linear-gradient(145deg, #173f4a, #275f6e);
            padding: 40px;
            border-radius: 15px;
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
            border: 1px solid #010f1f;
        }
        
        .light-mode .contact-form {
            background: linear-gradient(145deg, #ffffff, #cddee0);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
            border: 1px solid #6e96a1;
        }
        
        .form-group {
            margin-bottom: 25px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: #e3f9fb;
        }
        
        .light-mode .form-group label {
            color: #173f4a;
        }
        
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 15px;
            border: 1px solid #010f1f;
            border-radius: 8px;
            font-size: 16px;
            background-color: #04151a;
            color: #cddee0;
            transition: border-color 0.3s;
        }
        
        .light-mode .form-group input,
        .light-mode .form-group textarea {
            border: 1px solid #6e96a1;
            background-color: #ffffff;
            color: #173f4a;
        }
        
        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: #6e96a1;
        }
        
        .light-mode .form-group input:focus,
        .light-mode .form-group textarea:focus {
            border-color: #010f1f;
        }
        
        .form-group textarea {
            min-height: 180px;
            resize: vertical;
        }
        
        .social-links {
            margin-top: 40px;
        }
        
        .social-links h3 {
            font-size: 32px;
            margin-bottom: 30px;
            color: #44767aff;
            display: inline-block;
        }
        
        .light-mode .social-links h3 {
            color: #173f4a;
        }
        
        .social-icons {
            display: flex;
            gap: 15px;
        }
        
        .social-icons a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 50px;
            height: 50px;
            background: #010f1f;
            color: #e3f9fb;
            border-radius: 50%;
            text-align: center;
            font-size: 20px;
            transition: all 0.3s;
            text-decoration: none;
        }
        
        .light-mode .social-icons a {
            background: #6e96a1;
            color: #04151a;
        }
        
        .social-icons a:hover {
            background: #6e96a1;
            transform: translateY(-5px);
        }
        
        .light-mode .social-icons a:hover {
            background: #010f1f;
            color: #e3f9fb;
        }
        
        /* Footer */
        footer {
            background: #275f6e;
            color: #cddee0;
            padding: 80px 0 40px;
            border-top: 1px solid #173f4a;
        }
        
        .light-mode footer {
            background: #ffffff;
            color: #010f1f;
            border-top: 1px solid #cddee0;
        }
        
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 40px;
        }
        
        .footer-about {
            margin-bottom: 20px;
        }
        
        .footer-logo {
            font-size: 28px;
            font-weight: bold;
            margin-bottom: 15px;
            color: #e3f9fb;
        }
        
        .light-mode .footer-logo {
            color: #173f4a;
        }
        
        .footer-logo span {
            display: block;
            font-size: 16px;
            font-weight: normal;
            color: #6e96a1;
        }
        
        .light-mode .footer-logo span {
            color: #010f1f;
        }
        
        .footer-links h4,
        .footer-contact h4 {
            font-size: 20px;
            margin-bottom: 15px;
            color: #e3f9fb;
        }
        
        .light-mode .footer-links h4,
        .light-mode .footer-contact h4 {
            color: #173f4a;
        }
        
        .footer-links ul {
            list-style: none;
        }
        
        .footer-links ul li {
            margin-bottom: 10px;
        }
        
        .footer-links ul li a {
            color: #cddee0;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .light-mode .footer-links ul li a {
            color: #010f1f;
        }
        
        .footer-links ul li a:hover {
            color: #6e96a1;
        }
        
        .light-mode .footer-links ul li a:hover {
            color: #173f4a;
        }
        
        .footer-contact p {
            margin-bottom: 10px;
        }
        
        .footer-bottom {
            margin-top: 50px;
            padding-top: 20px;
            border-top: 1px solid #173f4a;
            text-align: center;
            color: #6e96a1;
        }
        
        .light-mode .footer-bottom {
            border-top: 1px solid #cddee0;
            color: #6e96a1;
        }
        
        /* Responsive */
        @media (max-width: 768px) {
            .about-content {
                flex-direction: column;
            }
            
            nav ul {
                flex-direction: column;
                background: #173f4a;
                position: absolute;
                top: 70px;
                right: 0;
                width: 200px;
                display: none;
                padding: 20px;
                border-radius: 0 0 0 10px;
            }
            
            .light-mode nav ul {
                background: #ffffff;
                border: 1px solid #cddee0;
            }
            
            nav ul.active {
                display: flex;
                flex-direction: column;
            }
            
            nav ul li {
                margin: 15px 0;
            }
            
            .menu-toggle {
                display: block;
                cursor: pointer;
                font-size: 24px;
                color: #e3f9fb;
            }
            
            .light-mode .menu-toggle {
                color: #173f4a;
            }
            
            nav ul li a {
                color: #e3f9fb;
            }
            
            .light-mode nav ul li a {
                color: #010f1f;
            }
        }
        
        @media (min-width: 769px) {
            .menu-toggle {
                display: none;
            }
        }