:root {
  --bg: #fbfaf7;
  --fg: #1d1d1f;
  --muted: #6b6b70;
  --line: #e3e0d8;
  --accent: #0f5c53;
  --code-bg: #f2efe7;
  --max: 760px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141513;
    --fg: #e8e6df;
    --muted: #9b988f;
    --line: #2c2e29;
    --accent: #7fd1bf;
    --code-bg: #1d1f1b;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.8 -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  text-rendering: optimizeLegibility;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.site-head {
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px 24px 18px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 700; letter-spacing: .02em; color: var(--fg); }
.site-head nav a { color: var(--muted); margin-left: 16px; font-size: 15px; }
.site-head nav a:hover { color: var(--accent); }
main { max-width: var(--max); margin: 0 auto; padding: 40px 24px 24px; }
.hero { margin-bottom: 40px; }
.hero h1 { font-size: 34px; line-height: 1.25; margin: 6px 0 12px; letter-spacing: -.01em; }
.kicker { color: var(--muted); font-size: 14px; margin: 0 0 6px; letter-spacing: .02em; }
.lede { color: var(--muted); font-size: 18px; margin: 0 0 28px; }
.post h1 { font-size: 33px; line-height: 1.3; margin: 4px 0 14px; letter-spacing: -.01em; }
.post h2 { font-size: 22px; margin: 40px 0 12px; line-height: 1.4; }
.post h3 { font-size: 18px; margin: 28px 0 10px; }
.post p { margin: 0 0 18px; }
.post ul, .post ol { margin: 0 0 18px; padding-left: 22px; }
.post li { margin: 6px 0; }
.post blockquote {
  margin: 0 0 18px; padding: 2px 0 2px 16px;
  border-left: 3px solid var(--line); color: var(--muted);
}
.post code {
  background: var(--code-bg); padding: 2px 5px; border-radius: 4px;
  font: 14px/1.6 "SFMono-Regular", Menlo, Consolas, monospace;
  word-break: break-word;
}
.post pre {
  background: var(--code-bg); padding: 14px 16px; border-radius: 8px;
  overflow-x: auto; line-height: 1.6;
}
.post pre code { background: none; padding: 0; }
.post table { width: 100%; border-collapse: collapse; margin: 0 0 20px; font-size: 15px; }
.post th, .post td { border-bottom: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
.tag {
  display: inline-block; margin-left: 8px; padding: 1px 8px;
  border: 1px solid var(--line); border-radius: 999px;
  font-size: 12px; color: var(--muted); white-space: nowrap;
}
.post-list { list-style: none; padding: 0; margin: 0; }
.item { padding: 22px 0; border-top: 1px solid var(--line); }
.item h2 { font-size: 21px; margin: 0 0 8px; line-height: 1.45; }
.item h2 a { color: var(--fg); }
.item h2 a:hover { color: var(--accent); text-decoration: none; }
.summary { color: var(--muted); margin: 0; font-size: 16px; }
.archive { list-style: none; padding: 0; }
.archive li { padding: 10px 0; border-bottom: 1px solid var(--line); display: flex; gap: 14px; flex-wrap: wrap; }
.archive .date { color: var(--muted); font-size: 14px; font-variant-numeric: tabular-nums; }
.back { margin-top: 36px; font-size: 15px; }
.site-foot {
  max-width: var(--max); margin: 0 auto; padding: 28px 24px 48px;
  border-top: 1px solid var(--line); color: var(--muted); font-size: 14px;
}
.site-foot p { margin: 4px 0; }
@media (max-width: 600px) {
  body { font-size: 16px; }
  .hero h1, .post h1 { font-size: 27px; }
  main { padding-top: 28px; }
  .site-head nav a { margin-left: 12px; }
}