/* Botón del menú */
        .btn-toggle-menu {
            top: 20px;
            right: 20px;
            background: #db4a45;
            color: white;
            border: none;
            padding: 10px 15px;
            cursor: pointer;
            z-index: 1001;
            border-radius: 5px;
            font-size: 18px;
            transition: transform 0.3s ease;
        }

        /* Menú desplegable */
        .side-menu {
            position: fixed;
            top: 0;
            right: -250px;
            width: 250px;
            height: 100%;
            background: #222;
            transition: right 0.3s ease-in-out;
            padding-top: 60px;
            z-index: 1000;
        }

        .side-menu a {
            display: block;
            padding: 15px;
            color: white;
            text-decoration: none;
            border-bottom: 1px solid #444;
            text-align: center;
        }

        .side-menu a:hover {
            background: #444;
        }

        /* Clase para mostrar el menú */
        .side-menu.active {
            right: 0;
        }

        /* Fondo semitransparente al abrir el menú */
        .menu-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            visibility: hidden;
            opacity: 0;
            transition: opacity 0.3s ease, visibility 0.3s;
            z-index: 999;
        }

        .menu-overlay.active {
            visibility: visible;
            opacity: 1;
        }