head {
    background-color: greenyellow;
}

a {
    text-decoration: none;
    color: red
}

body {
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
}

main {
    padding: 16px
}

footer {
    padding-top: 24px;
    padding-bottom: 24px;
    padding-left: 24px;
    padding-right: 24px;
}

img {
    height: 200px;
}

nav {
    background-color: greenyellow;
    border-color: black;
    border-bottom: 1px;
    padding-left: 16px;
    padding-right: 16px;
    padding-top: 16px;
    padding-bottom: 16px;
}