body {
    margin: auto;
}

h1 {
   text-align: center;
   font-size: 100px;
   color: #757575;
   /* text-decoration: underline red; */

}
table {
    border: 4px solid black;
   border-bottom: hidden;
   border-top: hidden;
   border-left: hidden;
   border-right: hidden;
   margin: auto;
   margin-bottom: 100px;
   border-collapse: collapse;
   background-color:#1b5e20;
   /* float: left; */
}
td {
    padding: 40px;
     /* width: 100px;
    height: 100px; */
    font-size: 50px;
    color: #f8fafa;
    border: 4px solid blue;
    text-align: center;
    /* text-align: center; */

}
tr {
    border: 4px solid blue;

}
#output {
    clear: both;
    text-align: center;
    font-size: 50px;
    color: #004d40;
   background-color: yellow;


}
.p1,.p2 {
    /* float: left; */
    margin: auto;
    /* margin-left: 25px;
    margin-right: 25px; */
}
label {
    font-size: 25px;
}
input {
    font-size: 25px;
    padding: 5px;
    color: #01579b;
}
#flex {
    display: flex;
    flex-direction: row;
}
.margin-top {
    margin-top: 100px;
}

@media only screen and (max-width: 600px){
    .p1,.p2 {

        margin-left: 40px;
        flex-direction: column;
    }
}