body {
    background-color: #9cccf5;

}

.ext {
    display: flex;
    justify-content: center;
    background-color: #ffffff;
    width: 600px;
    margin-bottom: 5px;
    margin-left: auto;
    margin-right: auto;
    }
.menu {
    display: flex;
    /*position: absolute;*/
    margin: auto;
    bottom: 0;
    justify-content: center;
    background-color: #9cccf5;
    width: 200px;
    /*margin-bottom: 5px;*/
    margin-left: auto;;
    margin-right: auto;
}

.col_1 {
    width: 10%;
    background-color: #ffffff;
    /*border: 3px solid green;*/
}
.col_2 {
    width: 90%;
    background-color: #ffffff;
    /*border: 3px solid green;*/
}
.row_1 {
    height: 20px;
    background-color: #ffffff;
    /*border: 3px solid green;*/
}
.row_2 {
    height: 80px;
    background-color: #ffffff;
    border: 3px solid green;
}
.img {
    height: 80px;
    width: 400px;
    background-color: #ffffff;
    /*border: 3px solid green;*/
}


    .cb {
    background-color: #f1f1f1;
    margin: auto;
    width: 100px;
    margin: 10px;
    text-align: center;
    line-height: 75px;
    font-size: 30px;
    }
     .col_der {
    background-color: #2ff00;
    width: 200px;
    margin: 10px;
    text-align: center;
    line-height: 75px;
    font-size: 30px;
    }

    .tb {
    background-color: #f5f6a3;
    width: 200px;
    height:50px;
    margin: 10px;
    text-align: center;
    line-height: 75px;
    font-size: 30px;
    }

    .graf {
    background-color: #b6ff00;
    width: 200px;
    height:200px;
    margin: 10px;
    text-align: center;
    line-height: 75px;
    font-size: 30px;
    }

    /* pruebas*/
    /*Dibujar un cuadro de 600 pixels de ancho centrado*/

    .flex-container {
    display: flex;
    flex-direction: row;
    margin: auto;
    background-color: #ffffff;
   
    /*justify-content: center;*/
    align-items: center;
    /*height: 150px;*/
    /*border: 3px solid green;*/ 
    width: 90%;
    margin-bottom: 5px;
   }
    .flex-container2 {
    display: flex;
    flex-direction: row;
    margin: auto;
    background-color: #ddddee;
   
    /*justify-content: center;*/
    align-items: center;
    /*height: 150px;*/
    /*border: 3px solid green;*/ 
    width: 90%;
    margin-bottom: 5px;
   }
    .c1 {
        /*background-color: #97f7a2;*/
        /*border: 3px solid green;*/
        width: 30px;
        /*height: 100%;*/
        /*min-height: 50px;*/
    }

    .c2 {
        display: flex;
        flex-direction: column;
        text-align: center;
        margin: auto;
        /*background-color: #f5b66a;*/
        justify-content: center;
        align-items: center;
        width: 90%;
        min-height: 50px;
        align-items: center;
        /*border: 3px solid green;*/
        font-size: 30px;
    }

.interior {
  /*justify-content: center;
  align-items: center;*/
  height: 200px;
  width: 600px;
  /*border: 3px solid green;*/
}

.menu_center {
  margin: auto;
  width: 50%;
  border: 3px solid green;
  padding: 10px;
  
  /*justify-content: center;
  align-items: center;*/
}

.menu_elementos {
  margin: auto;
  width: 50%;
  border: 3px solid green;
  padding: 10px;
}