.grid-container-element { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    grid-gap: 10px; 
    width: 75%; 
} 
.grid-child-element { 
    margin: 0px;
    float: left;
}



@media only screen and (max-width: 767px)
{
    .grid-child-element
    {
        display: block; 
        float: none; 
        width: 100%;
        padding: 20px 0;
    }
}