/* ==== HEADER STYLING ==== */
        .main-header {
            /* background: #111; */
            color: #111;
            position: sticky;
            top: 0;
            width: 100%;
            z-index: 1000;
            box-shadow: 0 2px 5px rgba(0,0,0,0.4);
        }

        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 20px;
            max-width: 1200px;
            margin: auto;
        }

        .nav-logo-img {
            height: 50px;
            width: auto;
        }

        .nav-menu {
            display: flex;
            gap: 25px;
            list-style: none;
        }

        .nav-item {
            display: inline-block;
        }

        .nav-link {
            color: #00bcd4;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s ease;
        }

        .nav-link:hover, .nav-link.active {
            color: #00bcd4;
        }

        .theme-switcher {
            margin-left: 20px;
        }

        #theme-toggle-btn {
            background: #02a2b8;
            border: none;
            color: #fff;
            cursor: pointer;
            font-size: 18px;
        }

        .admin-btn {
            color: #fff;
            font-size: 20px;
            margin-left: 15px;
        }

        /* ==== MOBILE MENU ==== */
        .menu-toggle {
            display: none;
            font-size: 26px;
            color: #111;
            background: none;
            border: none;
            cursor: pointer;
        }

        @media (max-width: 768px) {
            .nav-menu {
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: #111;
                flex-direction: column;
                align-items: center;
                gap: 15px;
                padding: 20px 0;
                display: none;
            }

            .nav-menu.active {
                display: flex;
            }

            .menu-toggle {
                display: block;
            }

            .theme-switcher,
            .admin-link {
                display: none;
            }
        }