body { margin: 0; font-family: system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", sans-serif; }
main { max-width: 720px; margin: 48px auto; padding: 0 20px; line-height: 1.9; }
a { text-decoration: none; }
a:hover { text-decoration: underline; }
.date { opacity: .6; font-size: .9em; margin-left: .6em; }
.prose p { margin: 1em 0; }