body {
    margin: 0;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    height: 100dvh;
}

header {
    height: 4rem;
    border-bottom: 1px solid rgba(128, 128, 128, 0.500);
    display: flex;
    padding-inline: 2rem;
    justify-content: space-between;
    align-items: center;
}

h2 > a {
    color: black;
    text-decoration: none;
}

ul {
    display: flex;
    flex-direction: row;
    gap: 1rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

main {
    flex: 1;
    padding-inline: 2rem;
}

a {
    color: blue;
}

footer {
    min-height: 1rem;
    display: flex;
    justify-content: space-between;
    padding-block: 10px;
    padding-inline: 2rem;
    color: grey;
    border-top: 1px solid rgba(128, 128, 128, 0.500);
}

footer span {
    display: flex;
    gap: 3rem;
}