:root {
  --fg: #1a1a1a;
  --muted: #6b6b6b;
  --line: #e5e5e5;
  --bg: #fdfdfc;
  --accent: #2a5db0;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}

header.site {
  border-bottom: 1px solid var(--line);
  padding: 28px 0 18px;
  margin-bottom: 48px;
}

header.site .wrap {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--fg);
  text-decoration: none;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 20px;
  font-size: 14px;
}

nav a:hover { color: var(--accent); }

h1 {
  font-size: 26px;
  line-height: 1.35;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}

h2 {
  font-size: 19px;
  margin: 36px 0 12px;
}

.meta {
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 36px;
}

p { margin: 0 0 18px; }

ul, ol { margin: 0 0 18px; padding-left: 22px; }

li { margin-bottom: 6px; }

a { color: var(--accent); }

code {
  font-family: "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: #f2f2ef;
  padding: 2px 5px;
  border-radius: 3px;
}

pre {
  background: #f5f5f2;
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 14px 16px;
  overflow-x: auto;
  line-height: 1.55;
  margin: 0 0 20px;
}

pre code {
  background: none;
  padding: 0;
  font-size: 13px;
}

blockquote {
  margin: 0 0 20px;
  padding-left: 16px;
  border-left: 3px solid var(--line);
  color: var(--muted);
}

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 40px 0;
}

.post-list { list-style: none; padding: 0; margin: 0; }

.post-list li {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  margin: 0;
}

.post-list a { text-decoration: none; color: var(--fg); }

.post-list a:hover { color: var(--accent); }

.post-list time {
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.intro { color: var(--muted); margin-bottom: 40px; }

footer.site {
  margin-top: 72px;
  padding: 24px 0 48px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

footer.site a { color: var(--muted); }

@media (max-width: 560px) {
  header.site { padding-top: 20px; margin-bottom: 32px; }
  h1 { font-size: 22px; }
  .post-list li { flex-direction: column; gap: 2px; }
}