* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    color-scheme: white dark;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-size: 1.125rem;
    line-height: 1.5;
    display: flex;
    flex-direction: column;
    align-items: center;
}

img {
    max-width: 100%;
    display: block;
    margin: 1rem auto;
}

header,
.article-heading,
main {
    width: min(100ch, 100% - 3rem);
}

header {
    display: flex;
    align-items: center;
}

header img {
    margin: 1rem;
    border-radius: 50vh;
}

.flow > * + * {
    margin-top: 1rem;  
}

main {
    display: flex;
    gap: 2rem;
}

section {
    width: min(75ch, 100% - 2rem);
}

aside {
    width: min(25ch, 100% - 2rem);
}

.related {
    display: flex;
    justify-content: flex-start;
    align-items: flex-start;
    gap: 1em;
    font-size: 2rem;
    border-left: 20px solid salmon;
    padding-left: 2em;
}

.related img {
    max-width: 200px;
    margin: .5rem;
}

@media (max-width: 767px) {
    header,
    main,
    .related {
        flex-direction: column;
    }
}