:root {
            --primary-green: #2d6a4f;
            --light-green: #52b788;
            --earth-brown: #8b5a3c;
            --sky-blue: #4a90e2;
        }

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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            overflow-x: hidden;
        }

        /* Top Bar */
        .top-bar {
            background: linear-gradient(135deg, var(--primary-green), var(--light-green));
            color: white;
            padding: 10px 0;
            font-size: 14px;
        }

        .top-bar a {
            color: white;
            text-decoration: none;
            margin: 0 15px;
            transition: opacity 0.3s;
        }

        .top-bar a:hover {
            opacity: 0.8;
        }

        /* Language Switcher */
        .lang-switcher {
            display: flex;
            gap: 10px;
            align-items: center;
        }

        .lang-btn {
            background: rgba(255,255,255,0.2);
            border: 2px solid transparent;
            color: white;
            padding: 5px 12px;
            border-radius: 5px;
            cursor: pointer;
            transition: all 0.3s;
            font-size: 12px;
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .lang-btn:hover {
            background: rgba(255,255,255,0.3);
        }

        .lang-btn.active {
            background: white;
            color: var(--primary-green);
            border-color: white;
            font-weight: bold;
        }

        .lang-btn .fi {
            font-size: 18px;
        }

        /* Navigation */
        .navbar {
            background: white;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            padding: 15px 0;
        }

        .navbar-brand {
            font-size: 28px;
            font-weight: bold;
            color: var(--primary-green) !important;
        }

        .navbar-nav .nav-link {
            color: #333 !important;
            font-weight: 500;
            margin: 0 10px;
            transition: color 0.3s;
            position: relative;
        }

        .navbar-nav .nav-link:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            width: 0;
            height: 2px;
            background: var(--light-green);
            transition: all 0.3s;
            transform: translateX(-50%);
        }

        .navbar-nav .nav-link:hover:after {
            width: 80%;
        }

        .navbar-nav .nav-link:hover {
            color: var(--primary-green) !important;
        }

        /* Login Button */
        .btn-login {
            background: var(--primary-green);
            color: white !important;
            padding: 8px 25px;
            border-radius: 25px;
            border: 2px solid var(--primary-green);
            transition: all 0.3s;
            font-weight: 600;
            margin-left: 15px;
        }

        .btn-login:hover {
            background: transparent;
            color: var(--primary-green) !important;
            border-color: var(--primary-green);
        }

        /* Hero Section */
        .hero-section {
            height: 100vh;
            background: linear-gradient(rgba(0,0,0,0.3), rgba(0,0,0,0.3)),
                        url('https://images.unsplash.com/photo-1441974231531-c6227db76b6e?w=1920&q=80') center/cover;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            text-align: center;
        }

        .hero-content h1 {
            font-size: 3.5rem;
            font-weight: bold;
            margin-bottom: 20px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }

        .hero-content p {
            font-size: 1.5rem;
            margin-bottom: 30px;
        }

        .btn-eco {
            background: var(--light-green);
            color: white;
            padding: 15px 40px;
            border: none;
            border-radius: 50px;
            font-size: 18px;
            transition: all 0.3s;
            text-decoration: none;
            display: inline-block;
        }

        .btn-eco:hover {
            background: var(--primary-green);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.3);
            color: white;
        }

        /* Full Width Sections */
        .full-section {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
        }

        .section-mission {
            background: linear-gradient(rgba(45,106,79,0.85), rgba(45,106,79,0.85)),
                        url('https://images.unsplash.com/photo-1542601906990-b4d3fb778b09?w=1920&q=80') center/cover;
            color: white;
        }

        .section-projects {
            background: linear-gradient(rgba(255,255,255,0.95), rgba(255,255,255,0.95)),
                        url('https://images.unsplash.com/photo-1466611653911-95081537e5b7?w=1920&q=80') center/cover;
        }

        .section-impact {
            background: linear-gradient(rgba(74,144,226,0.9), rgba(74,144,226,0.9)),
                        url('https://images.unsplash.com/photo-1518173946687-a4c8892bbd9f?w=1920&q=80') center/cover;
            color: white;
        }

        .section-join {
            background: linear-gradient(rgba(139,90,60,0.9), rgba(139,90,60,0.9)),
                        url('https://images.unsplash.com/photo-1542273917363-3b1817f69a2d?w=1920&q=80') center/cover;
            color: white;
        }

        .section-content {
            padding: 80px 0;
        }

        .section-content h2 {
            font-size: 3rem;
            font-weight: bold;
            margin-bottom: 30px;
        }

        .section-content p {
            font-size: 1.2rem;
            line-height: 1.8;
            margin-bottom: 20px;
        }

        /* Cards */
        .eco-card {
            background: white;
            border-radius: 15px;
            padding: 30px;
            margin: 20px 0;
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);
            transition: transform 0.3s;
        }

        .eco-card:hover {
            transform: translateY(-10px);
        }

        .eco-card i {
            font-size: 3rem;
            color: var(--light-green);
            margin-bottom: 20px;
        }

        .eco-card h3 {
            color: var(--primary-green);
            margin-bottom: 15px;
        }

        /* Stats */
        .stat-item {
            text-align: center;
            padding: 30px;
        }

        .stat-number {
            font-size: 3.5rem;
            font-weight: bold;
            margin-bottom: 10px;
        }

        .stat-label {
            font-size: 1.2rem;
            opacity: 0.9;
        }

               /* Footer */
        footer {
            background: #1a1a1a;
            color: white;
            padding: 40px 0 20px;
        }

        footer a {
            color: var(--light-green);
            text-decoration: none;
        }

        footer a:hover {
            text-decoration: underline;
        }

        /* Mobile Responsive */
        @media (max-width: 768px) {
            .hero-content h1 {
                font-size: 2rem;
            }

            .hero-content p {
                font-size: 1rem;
            }

            .section-content h2 {
                font-size: 2rem;
            }

            .section-content p {
                font-size: 1rem;
            }

            .top-bar .d-flex {
                flex-direction: column;
                gap: 10px;
            }

            .stat-number {
                font-size: 2.5rem;
            }

            .lang-switcher {
                justify-content: center;
            }

            .btn-login {
                margin-left: 0;
                margin-top: 10px;
            }
        }

        html {
            scroll-behavior: smooth;
        }