header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: var(--header-footer-background-color);
    padding: 10px 20px;
    color: var(--header-footer-font-color);
}

header .logo img {
    max-height: 40px;
}

#menu-toggle-button {
    background-color: var(--header-footer-background-color);
    border: none;
    color: var(--header-footer-font-color);
    cursor: pointer;
    font-size: 1em;
    font-family: Arial, sans-serif;
    font-weight: bold;
}

#menu {
    background-color: var(--header-footer-background-color);
    border-color: var(--header-footer-font-color);
    box-shadow: 10px 10px;
    padding: 10px 20px;
}

#menu > ul {
    list-style: none;
    display: block;
    margin: 0;
    padding: 0;
}

#menu > ul > li {
    margin: 15px 15px;
}