.contenedor-principal{    
    display: flex;    
    height: 100%;
    position: relative;
}
.derecha{
    position:relative;
    width:100%; 
    padding: 8px
}

.contenedor-lista {        
        display: none;      
        width: 100%;
        height:120%;
        font-size: 1rem;
}

.index-titulo{
    width: 70%;
}
.index-login{
    width: 30%;
}
.index-form-login{
    display: flex;    
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
    padding: 5px;
    box-sizing:border-box;
}
@media (min-width:991px){ 
    .derecha{
        max-width: 80%;        
    } 
}
@media (max-width: 600px) {
   
    .tm-content { padding: 5px; }     
    .footer-link {      
      margin: 0 auto;
      width: 90%;      
    } 
    
    .fila { flex-direction: column; }  
    .columna { width: 100%; }
     .btn-menu{
        font-size: 1.2rem;
    }
    
}

@media (max-width: 550px){
    .div-contenedor {
        flex-direction: column;
    } 
    .index-titulo, .index-login{
        width: 100%;
    }
    .contenedor-lista { 
        height:max-content; 
    }
}