body {
    font: 400 15px;
    line-height: 1.8;
    color: #051124;
    background-color: black ;
    background: linear-gradient(to right, black, #2177F7); 
    /*margin: 1em 10em 1em;*/
  }
#tablero{
    margin:0% auto 0;
    width:100%;
    background-color: transparent;
    padding: 0em;
    padding-top: 0.5em;
}
    #tablero .fila{
    display: flex;
    flex-direction: row;
    justify-content: center;
    width:100%;
    text-align:center;
}
#tablero .fila div{
    display:flex;
    flex-direction: row;
    justify-content: center;
    font-size:150%;
    padding:1%;
    width:10%;
    height: 5em;
}

#tablero .fila .boton{
    width:25%;

    padding:1%;
}

.button {
    height: 100%;
    border: solid;
    border-color: #002783;
    border-radius: 0.5em;
    border-width: 0.1em;
    box-shadow: rgba(0,0,0,0.4) 0em 0.05em;
    width: 100%;
    text-align: center;
    font-size: 1em;
    padding: 0.5em;
}
p{
    background: #000080;
    color: #dfdfef;
    background:rgba(0,0,80,0.5);

}
footer{
    text-align:right;
}