:root {
            --primary-color: #e74c3c;
            --secondary-color: #3498db;
            --dark-color: #2c3e50;
            --light-color: #f8f8f8;
            --highlight-color: #e74c3c;
            --alt-bg-color: #f6f8fb; /* New variable for alternating background */
        }
        
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        
        body {
            font-family: 'Arial', sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: white;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        
        section {
            padding: 60px 0; /* Standard vertical padding for sections */
        }
        
        /* --- MODIFIED: NAVIGATION --- */
        .main-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background-color: rgba(255, 255, 255, 0.7);
            z-index: 1000;
            padding: 15px 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .nav-logo {
            height: 40px;
            position: relative;
            z-index: 1002; /* Ensure logo is above mobile menu background */
            margin-left:20px ;
        }
        
        .main-nav ul {
            display: flex;
            justify-content: center;
            list-style: none;
        }
        
        .main-nav li {
            margin: 0 15px;
        }
        
        .main-nav a {
            font-weight: bold;
            color: #3498db;
            text-decoration: none;
            font-size: 1.1rem;
            padding: 5px 10px;
            border-radius: 4px;
            transition: background-color 0.3s;
        }
        
        .main-nav a:hover {
            background-color: rgba(255, 255, 255, 0.2);
        }
        
        /* --- MODIFIED: MOBILE MENU --- */
        .mobile-menu-btn {
            display: none;
            position: fixed;
            top: 15px;
            right: 15px;
            z-index: 1001;
            background: rgba(44, 62, 80, 0.8);
            color: white;
            border: none;
            font-size: 1.8rem;
            width: 45px;
            height: 45px;
            border-radius: 50%;
            cursor: pointer;
            line-height: 45px;
            text-align: center;
        }
        
        @media (max-width: 768px) {
            .main-nav {
                padding: 15px;
            }

            .main-nav ul {
                display: none;
                flex-direction: column;
                align-items: center;
                justify-content: center;
                position: fixed;
                top: 0;
                left: 0;
                width: 100vw;
                height: 100vh;
                background-color: rgba(0, 0, 0, 0.95);
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .main-nav.active ul {
                display: flex;
            }
            
            .main-nav.active li {
                margin: 20px 0;
            }
            .main-nav.active a {
                font-size: 1.5rem;
            }
        }

        /* --- MODIFIED: HEADER STYLING FOR VIDEO --- */
        header {
            padding: 200px 20px 180px 20px;
            text-align: center;
            position: relative;
            color: white;
            overflow: hidden; /* Prevent video overflow */
            margin-top: 70px;
        }