header {
    display: grid;
    grid-template-columns: 11fr 1fr 1fr 1fr 1fr;
    align-items: baseline;
    justify-items: start;
    grid-column-gap: 2%;
    grid-row-gap: 20px;
    grid-column-end:
}

a {
    color: cornflowerblue;
    text-decoration: none;
    font-style: oblique;
    font-size: 13pt;
}

a:hover {
    font-style: normal;
    color: chocolate;
}

main {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    grid-template-rows: auto;
    grid-template-areas:
        "top top top top"
        "two two three three"
        "four four four four";
}

.one {
    grid-area: top;
    background-color: lightpink;
    width: 100%;
    height: 6vw;
}

.two {
    grid-area: two;
    background-color: coral;
    width: 100%;
    height: 6vw;
}

.three {
    grid-area: three;
    background-color: cornflowerblue;
    width: 100%;
    height: 6vw;
}

.four {
    grid-area: four;
    background-color: mediumvioletred;
    width: 100%;
    height: 6vw;
}

p {
    background-color: cadetblue;
}

@media (min-width: 1px) and (max-width: 650px) {
    header {
        display: grid;
        grid-template-columns: 1fr;
        grid-template-rows: 1fr;
        justify-items: center;
        grid-column-gap: 2%;
        grid-row-gap: 5px;
        margin-bottom: 15px;
        text-align: center;
    }
}