body {
            box-sizing: border-box;
        }
        
        @import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');
        
        * {
            font-family: 'Inter', sans-serif;
        }
        
        .gradient-bg {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        }
        
        .floating-animation {
            animation: float 6s ease-in-out infinite;
        }
        
        .floating-animation-delayed {
            animation: float 6s ease-in-out infinite 2s;
        }
        
        @keyframes float {
            0%, 100% { transform: translateY(0px) rotate(0deg); }
            50% { transform: translateY(-20px) rotate(5deg); }
        }
        
        .cube-3d {
            transform-style: preserve-3d;
            animation: rotate3d 20s linear infinite;
        }
        
        @keyframes rotate3d {
            0% { transform: rotateX(0deg) rotateY(0deg); }
            100% { transform: rotateX(360deg) rotateY(360deg); }
        }
        
        .fade-in-up {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.8s ease-out;
        }
        
        .fade-in-up.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        .card-hover {
            transition: all 0.3s ease;
        }
        
        .card-hover:hover {
            transform: translateY(-10px) scale(1.02);
            box-shadow: 0 25px 50px rgba(0,0,0,0.2);
        }
        
        .nav-link {
            position: relative;
            transition: color 0.3s ease;
        }
        
        .nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: -5px;
            left: 0;
            background: linear-gradient(90deg, #667eea, #764ba2);
            transition: width 0.3s ease;
        }
        
        .nav-link:hover::after {
            width: 100%;
        }
        
        .video-placeholder {
            background: linear-gradient(45deg, #f0f0f0, #e0e0e0);
            position: relative;
            overflow: hidden;
        }
        
        .video-placeholder::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
            animation: shimmer 2s infinite;
        }
        
        @keyframes shimmer {
            0% { left: -100%; }
            100% { left: 100%; }
        }
        
        .mobile-menu {
            transform: translateX(100%);
            transition: transform 0.3s ease;
        }
        
        .mobile-menu.open {
            transform: translateX(0);
        }