html {
    --content-width: 100%;
    --header-height: auto;
}

body > header {
    position: unset;
    margin-top: 0;
    margin: 0;
    padding: 1rem;
}

body > header > div {
    flex-direction: column;
    gap: 0;
}

body > header nav {
    padding: 0;
}

body > header nav ul {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
    padding: 0;
}

body > header[data-with-logo] div::before {
    width: 100%;
    height: var(--logo-width);
    margin-bottom: 1rem;
}

ul.classes {
    grid-template-columns: 1fr;
}

main > section + section {
    margin-top: 3rem;
}

main,
section {
    gap: 1rem;
}

ul.image-gallery {
    flex-direction: column;
}

ul.week-calendar {
    flex-direction: column;
}

article.course {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

article.course h4 {
    order: 0;
}

article.course::before {
    order: 1;
}

article.course > * {
    order: 2;
    margin: 0;
}

ul.team-members {
    flex-direction: column;
}

ul.team-members li {
    width: 100%;
}

form,
label,
fieldset,
input,
textarea {
    width: 100%;
}