/* =========================================================
       BOTÓN LECTURA FÁCIL (ICONO)
    ========================================================= */

            #reading-mode {
                position: fixed;
                display: flex;
                right: 0;
                top: calc(50dvh - 21px);
                width: 40px;
                height: 40px;
                /* padding: 4px; */
                border: 1px solid #fff;
                background: #333399;
                cursor: pointer;
                display: flex;
                align-items: center;
                justify-content: center;
                z-index: 997;
            }

            #reading-mode img {
                width: 36px;
                height: 36px;
                display: block;
            }

            /* Estado activo */
            #reading-mode[aria-pressed="true"] {
                border: 3px solid #ffeb3b;
                background: #eef4ff;
            }

            /* =========================================================
       MENSAJE CENTRADO
    ========================================================= */

            .mensaje-overlay {
                position: fixed;
                inset: 0;
                display: flex;
                align-items: center;
                justify-content: center;
                z-index: 9999;
                pointer-events: none;
                background-color: rgba(0, 0, 0, 0.25);
            }

            .mensaje-overlay[hidden] {
                display: none;
            }

            .mensaje-contenido {
                background: #333399;
                color: #fff;
                padding: 1rem 1.6rem;
                border-radius: 12px;
                font-size: 1.05rem;
                box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
                max-width: 90%;
                text-align: center;
            }