:root{--primary-green:#2d6a4f;--secondary-green:#40916c;--earth-brown:#6c584c;--water-blue:#457b9d;--sky-blue:#a8dadc;--light-bg:#f8f9fa;--white:#ffffff;--dark-text:#333333;--light-text:#666666;--transition:all 0.3s ease;--header-height:80px}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:Lato,'Open Sans',sans-serif;line-height:1.6;color:var(--dark-text);background-color:var(--white);overflow-x:hidden}h1,h2,h3,h4{font-weight:700;margin-bottom:1rem;color:var(--primary-green)}p{margin-bottom:1rem}a{text-decoration:none;color:inherit;transition:var(--transition)}ul{list-style:none}img{max-width:100%;height:auto}.container{max-width:1200px;margin:0 auto;padding:0 20px}section{padding:100px 0}.btn{display:inline-block;padding:12px 30px;border-radius:5px;font-weight:600;cursor:pointer;transition:var(--transition);border:none}.btn-primary{background-color:var(--primary-green);color:var(--white)}.btn-primary:hover{background-color:var(--secondary-green);transform:translateY(-2px)}.btn-outline{background-color:transparent;border:2px solid var(--primary-green);color:var(--primary-green)}.btn-outline:hover{background-color:var(--primary-green);color:var(--white)}header{height:var(--header-height);background-color:var(--white);box-shadow:0 2px 10px rgba(0,0,0,.1);position:fixed;top:0;width:100%;z-index:1000}header .container{display:flex;justify-content:space-between;align-items:center;height:100%}.logo{display:flex;align-items:center;gap:15px;font-size:1.5rem;font-weight:700;color:var(--primary-green)}.logo-img{height:60px;width:auto;display:block}nav ul{display:flex;gap:25px;align-items:center}nav ul li a:hover{color:var(--primary-green)}.lang-selector{display:flex;gap:10px;border-left:1px solid #ddd;padding-left:20px;margin-left:10px}.lang-btn{background:0 0;border:none;cursor:pointer;font-weight:600;color:var(--light-text);padding:2px 5px;font-size:.9rem}.lang-btn.active{color:var(--primary-green);border-bottom:2px solid var(--primary-green)}.menu-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer}.menu-toggle span{width:25px;height:3px;background-color:var(--primary-green);border-radius:3px}.hero{height:100vh;background:linear-gradient(rgba(255,255,255,.7),rgba(255,255,255,.7)),url('img/hero-bg.webp') center/cover no-repeat;display:flex;align-items:center;padding-top:var(--header-height)}.hero-content{max-width:800px}.hero h1{font-size:3.5rem;line-height:1.2;margin-bottom:1.5rem}.hero p{font-size:1.25rem;margin-bottom:2rem;color:var(--light-text)}.hero-btns{display:flex;gap:15px}.section-title{text-align:center;margin-bottom:60px}.section-title h2{font-size:2.5rem;position:relative;display:inline-block;padding-bottom:15px}.section-title h2::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:60px;height:4px;background-color:var(--earth-brown)}.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}.about-text h3{color:var(--earth-brown);margin-bottom:1.5rem}.about-features{margin-top:30px;display:grid;grid-template-columns:1fr 1fr;gap:20px}.feature-item{display:flex;align-items:center;gap:10px;font-weight:600}.feature-item i{color:var(--primary-green)}.bg-light{background-color:var(--light-bg)}.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:30px}.card{background-color:var(--white);padding:40px;border-radius:10px;box-shadow:0 5px 15px rgba(0,0,0,.05);transition:var(--transition);height:100%;border-bottom:4px solid transparent}.card:hover{transform:translateY(-10px);border-bottom:4px solid var(--primary-green)}.card i{font-size:2.5rem;color:var(--primary-green);margin-bottom:20px;display:block}.card h3{font-size:1.4rem;margin-bottom:15px}.steps{display:flex;flex-wrap:wrap;gap:30px;justify-content:center}.step{flex:1;min-width:250px;text-align:center;position:relative}.step-number{width:60px;height:60px;background-color:var(--primary-green);color:var(--white);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:700;margin:0 auto 20px}.projects-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(350px,1fr));gap:30px}.project-card{position:relative;overflow:hidden;border-radius:10px;height:300px}.project-img{width:100%;height:100%;background-color:#ddd;object-fit:cover}.project-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:rgba(45,106,79,.9);color:var(--white);display:flex;flex-direction:column;justify-content:center;padding:30px;opacity:0;transition:var(--transition)}.project-card:hover .project-overlay{opacity:1}.project-overlay h3{color:var(--white);margin-bottom:10px}.cta{background:linear-gradient(rgba(45,106,79,.9),rgba(45,106,79,.9)),url('https://images.unsplash.com/photo-1523348837708-15d4a09cfac2?auto=format&fit=crop&q=80&w=1600') center/cover;color:var(--white);text-align:center;padding:80px 0}.cta h2{color:var(--white);font-size:2.2rem;margin-bottom:1.5rem}.cta p{font-size:1.2rem;margin-bottom:2rem;max-width:700px;margin-left:auto;margin-right:auto}.contact-container{display:grid;grid-template-columns:1fr 2fr;gap:50px}.contact-info h3{margin-bottom:1.5rem}.contact-details{margin-bottom:30px}.contact-item{display:flex;gap:15px;margin-bottom:20px}.contact-item i{color:var(--primary-green);font-size:1.2rem}.contact-form{background-color:var(--white);padding:40px;border-radius:10px;box-shadow:0 5px 25px rgba(0,0,0,.1)}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:5px;font-weight:600}.form-control{width:100%;padding:12px;border:1px solid #ddd;border-radius:5px;font-family:inherit}.form-control:focus{outline:0;border-color:var(--primary-green)}textarea.form-control{height:120px;resize:vertical}.alert{padding:15px;border-radius:5px;margin-bottom:20px;display:none}.alert-success{background-color:#d4edda;color:#155724;border:1px solid #c3e6cb}.alert-error{background-color:#f8d7da;color:#721c24;border:1px solid #f5c6cb}footer{background-color:#222;color:#eee;padding:0 0 20px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:50px;margin-bottom:40px}.footer-logo{color:var(--white);font-size:1.5rem;font-weight:700;margin-bottom:20px;display:block}.footer-links h4{color:var(--white);margin-bottom:20px}.footer-links ul li{margin-bottom:10px}.footer-links ul li a:hover{color:var(--sky-blue)}.footer-bottom{border-top:1px solid #444;padding-top:20px;text-align:center;font-size:.9rem;color:#888}.lang-en [data-lang=fr],.lang-fr [data-lang=en]{display:none!important}@media (max-width:992px){.hero h1{font-size:2.8rem}.about-grid,.contact-container{grid-template-columns:1fr}}@media (max-width:768px){.menu-toggle{display:flex}nav{position:fixed;top:var(--header-height);left:-100%;width:100%;height:calc(100vh - var(--header-height));background-color:var(--white);flex-direction:column;padding:40px;transition:var(--transition);box-shadow:0 5px 10px rgba(0,0,0,.1)}nav.active{left:0}nav ul{flex-direction:column;align-items:flex-start;width:100%}.lang-selector{border-left:none;padding-left:0;margin-left:0;margin-top:20px}.hero-btns{flex-direction:column}.footer-grid{grid-template-columns:1fr}}