*{
    box-sizing: border-box;
}
:root{
    --colorBoder: rgb(85,85,85);
}


body{
    padding: 0px;
    margin: 0px;
    font-family: Arial, Helvetica, sans-serif;
}

main {
    width: auto;
    margin: auto;
    margin-top: 25vh;
}
table{
    margin: auto;
    /* background-color: rgb(239, 239, 240); */
    padding: 10px;
    border: 2px solid var(--colorBoder);
    border-radius: 7px;
    background-image: url(fondo.jpg);
}

table td{
    padding: 5px;
    border-spacing: 0px;
}

button{
    background-color: darkgrey;
    color: white;
    border: 2px solid var(--colorBoder);
    border-radius: 4px;
    width: 60px;
    height: 60px;
    font-size: 1.3em;
}

.verde{
    background-color: darkcyan;
}

.azul{
    background-color: dodgerblue;
}
.ancho100{
    width: 100%;
}


#resultado{
    border: 2px solid var(--colorBoder) ;
    border-radius: 5px;
    font-size: 1.2em;
    padding: 10px;
    background-color: rgba(255, 255, 255, 0.80);
    min-height: 45px;
}

#historial{
    height: 140px;
    width: calc((60px + 10px + 4px)*6);
    font-size: 1.3em;
    overflow-y: auto;
    background-color: rgba(239, 239, 240, 0.923);
    padding: 6px;
}

#historial ul{
    list-style: none;
    margin: 0px;
    padding: 0px;
}
#historial ul li{
    border-bottom: 1px solid slategray ;
    padding-bottom: 8px;
    padding-top: 8px;
    cursor: pointer;
}