:root { color-scheme: light dark; }
* { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  max-width: 44rem; margin: 0 auto; padding: 0 1.25rem 4rem;
  line-height: 1.75; color: #1c1c1e; background: #fff;
}
@media (prefers-color-scheme: dark) {
  body { color: #ececee; background: #101012; }
  a { color: #6eb5ff; }
  code { background: #222; }
}
h1 { font-size: 1.9rem; margin: 2rem 0 .5rem; }
h2 { font-size: 1.25rem; margin: 2rem 0 .6rem; }
h3 { font-size: 1.05rem; margin: 1.4rem 0 .4rem; }
p { margin: .6rem 0; }
.meta { color: #8a8a8e; font-size: .9rem; }
nav.top {
  display: flex; flex-wrap: wrap; gap: .6rem 1rem; align-items: center;
  padding: 1rem 0; border-bottom: 1px solid #d9d9de; font-size: .95rem;
}
nav.top .brand { font-weight: 600; margin-right: auto; }
.license { white-space: pre-wrap; font-size: .85rem; color: #555;
           background: #f4f4f6; border: 1px solid #e3e3e8;
           border-radius: 8px; padding: 1rem 1.25rem; overflow-x: auto; }
@media (prefers-color-scheme: dark) {
  .license { color: #c9c9ce; background: #18181c; border-color: #333; }
  nav.top { border-color: #333; }
}
footer { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid #d9d9de;
         color: #8a8a8e; font-size: .85rem; }
@media (prefers-color-scheme: dark) { footer { border-color: #333; } }
.email { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }