* {
    box-sizing: border-box;

}

header form {

    display: grid;
    grid-template-columns: 1fr 1fr;

}

header input {
    max-width: 130px;
}

#tabla {
    margin-top: 30px;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    margin-bottom: 30px;
}

.ok {
    background-color: green;
}

.ko {
    background-color: red;
}

@media (max-width: 500px) {

    header form {

        grid-template-columns: 1fr;

    }

    #tabla {
        margin-top: 10px;
        grid-template-columns: 1fr;
        margin-bottom: 10px;
    }

}