button, input, select {
    width: 100%;
    height: 100%;
}
td {
    width: 20%;
}
.grid {
    margin-top: 20px;
    margin-bottom: 20px;
}
.parent {
    display: grid;
    grid-column-gap: 20px;
    grid-row-gap: 20px;
    margin-top: 20px;
    margin-bottom: 20px;
}
@media (min-width: 800px) {
    .parent {
        grid-template-columns: repeat(4, 1fr);
    }
}