body {
    font-family: serif;
    color: #111;
    background: #f7f7f8;
    margin: 0;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
main { max-width: 40vw; position: relative; }

.sep { margin-right: 1rem; }
.light { color: #444; }
.tall { line-height: 1.5; }

@media (max-width: 1200px) { main { max-width: 60vw; } }
@media (max-width: 768px)  { main { max-width: 90vw; } }