/* Navigation */
        nav {
            position: fixed;
            top: 0;
            width: 100%;
            padding: 20px 50px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            z-index: 1000;
            background: rgba(5, 5, 16, 0.8);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0, 255, 204, 0.1);
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            background: linear-gradient(45deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .nav-links {
            display: flex;
            gap: 30px;
        }

        .nav-links a {
            color: var(--light);
            text-decoration: none;
            font-weight: 500;
            position: relative;
            transition: all 0.3s ease;
        }

        .nav-links a:hover {
            color: var(--primary);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: width 0.3s ease;
        }

        .nav-links a:hover::after {
            width: 100%;
        }

        .hamburger {
            display: none;
            cursor: pointer;
            font-size: 1.5rem;
        }

        .theme-toggle {
            cursor: pointer;
            font-size: 1.5rem;
            margin-left: 20px;
            color: var(--primary);
            transition: color 0.3s;
        }

        .theme-toggle:hover {
            color: var(--secondary);
        }