header {
    background-color: var(--header-background-color);
    padding: 1rem;
    text-align: center;

    nav ul {
        list-style: none;
        margin: 0;
        padding: 0;
        display: flex;
        justify-content: center;
        gap: 1rem;
    }
}

footer {
    background-color: var(--footer-background-color);
    padding: 1rem;
    text-align: center;
    color: var(--header-background-color);
}