/**
 * Modulo: Botón Volver Arriba
 */
#btnTop {
    position: fixed;
    bottom: 25px;
    right: 25px;
    background-color: var(--color-primary);
    color: var(--bg-white);
    border: none;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    font-size: 18px;
    cursor: pointer;
    display: none; /* Oculto por defecto */
    transition: all 0.3s ease;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    z-index: 9999;
}

#btnTop:hover {
    background-color: var(--color-secondary);
    transform: translateY(-3px);
}