body{
    font-family: Arial, Helvetica, sans-serif;
}
#main_heading{
     text-align: center;

}
.grid_container{
    display: grid;
    grid-template-columns: 200px 150px 100px;
    column-gap: 10px;
    margin-top: 5px ;
    row-gap: 10px;
}
.add{
    background-color: green;
 
}
.delete{
    background-color: red;
}