:root { color-scheme: light dark; }
body {
  max-width: 42rem;
  margin: 3rem auto;
  padding: 0 1.25rem;
  font: 16px/1.75 -apple-system, "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
}
header { margin-bottom: 2.5rem; }
header a { color: inherit; text-decoration: none; font-weight: 600; font-size: 1.25rem; }
h1 { font-size: 1.5rem; line-height: 1.4; }
h2 { font-size: 1.15rem; margin-top: 2rem; }
ul.notes { list-style: none; padding: 0; }
ul.notes li { margin: .6rem 0; }
a { color: #2563eb; }
code, pre { font-family: ui-monospace, "JetBrains Mono", Menlo, monospace; font-size: .9em; }
pre { padding: .8rem 1rem; overflow-x: auto; background: rgba(127, 127, 127, .12); border-radius: 6px; }
footer { margin-top: 4rem; font-size: .85rem; opacity: .6; }