:root {
  --paper: #fbfaf7;
  --paper-soft: #f3f1ea;
  --ink: #1f1e1c;
  --ink-2: #46433d;
  --muted: #8a857c;
  --line: #e5e1d7;
  --line-soft: #eeebe3;
  --accent: #8c5535;
  --accent-soft: #efe4da;
  --serif: Georgia, "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: "SF Mono", "JetBrains Mono", Consolas, "Courier New", monospace;
  --w: 660px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #161514;
    --paper-soft: #211f1d;
    --ink: #e9e5dd;
    --ink-2: #c3bdb2;
    --muted: #8d877c;
    --line: #2f2c28;
    --line-soft: #262421;
    --accent: #cf9668;
    --accent-soft: #3a2b21;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.9;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent-soft); color: var(--ink); }

a { color: var(--ink); text-decoration: none; }

.wrap {
  max-width: var(--w);
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 34px 0 18px;
  border-bottom: 1px solid var(--line);
}

.brand {
  font-family: var(--serif);
  font-size: 19px;
  letter-spacing: 0.06em;
  color: var(--ink);
}

.brand:hover { color: var(--accent); }

.site-nav { font-family: var(--sans); }

.site-nav a {
  margin-left: 22px;
  font-size: 13.5px;
  color: var(--muted);
  letter-spacing: 0.04em;
  transition: color 0.18s;
}

.site-nav a:hover,
.site-nav a.active { color: var(--accent); }

main { padding: 52px 0 88px; }

.hero { margin-bottom: 46px; }

.hero h1 {
  margin: 0 0 10px;
  font-size: 28px;
  font-weight: 400;
  letter-spacing: 0.04em;
  line-height: 1.5;
}

.hero p {
  margin: 0;
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
}

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

.post-item {
  padding: 26px 0;
  border-bottom: 1px solid var(--line-soft);
}

.post-item:first-child { border-top: 1px solid var(--line-soft); }

.post-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--muted);
  opacity: 0.6;
}

.post-title {
  display: inline-block;
  font-size: 19.5px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  transition: color 0.18s;
}

.post-item:hover .post-title { color: var(--accent); }

.post-excerpt {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.post-header { margin-bottom: 40px; }

.post-header .post-meta { margin-bottom: 14px; }

.post-header h1 {
  margin: 0;
  font-size: 29px;
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: 0.02em;
}

.post-tags { margin-top: 16px; }

.tag {
  display: inline-block;
  font-family: var(--sans);
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 1px 11px;
  margin-right: 8px;
  letter-spacing: 0.04em;
}

.post-body { font-size: 17px; line-height: 1.95; }

.post-body p { margin: 0 0 1.45em; }

.post-body h2 {
  font-size: 20px;
  font-weight: 400;
  letter-spacing: 0.02em;
  margin: 2.4em 0 0.9em;
  padding-bottom: 0.35em;
  border-bottom: 1px solid var(--line-soft);
}

.post-body h3 {
  font-size: 17.5px;
  font-weight: 500;
  margin: 2em 0 0.7em;
}

.post-body blockquote {
  margin: 1.8em 0;
  padding: 2px 0 2px 22px;
  border-left: 2px solid var(--accent);
  color: var(--ink-2);
}

.post-body blockquote p { margin: 0; }

.post-body ul,
.post-body ol { margin: 0 0 1.45em; padding-left: 1.5em; }

.post-body li { margin: 0.45em 0; }

.post-body hr {
  border: 0;
  height: 1px;
  background: var(--line);
  margin: 2.8em 0;
}

.post-body a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: var(--accent-soft);
}

.post-body a:hover { text-decoration-color: var(--accent); }

.post-body img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 1.8em auto;
  border-radius: 4px;
}

.post-body code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--paper-soft);
  padding: 2px 6px;
  border-radius: 4px;
}

.post-body pre {
  background: var(--paper-soft);
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  padding: 16px 18px;
  overflow-x: auto;
  line-height: 1.7;
  margin: 0 0 1.45em;
}

.post-body pre code {
  background: none;
  padding: 0;
  font-size: 13.5px;
}

.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 28px;
  margin-top: 76px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.post-nav a { color: var(--muted); transition: color 0.18s; max-width: 46%; }
.post-nav a:hover { color: var(--accent); }

.post-nav .direction {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
  opacity: 0.75;
  margin-bottom: 4px;
}

.post-nav .next { text-align: right; margin-left: auto; }

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  border-top: 1px solid var(--line);
  padding: 26px 0 64px;
  font-family: var(--sans);
  font-size: 12.5px;
  color: var(--muted);
  letter-spacing: 0.03em;
}

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

@media (max-width: 600px) {
  body { font-size: 16.5px; }
  .wrap { padding: 0 20px; }
  .site-header { padding: 26px 0 16px; }
  .brand { font-size: 17px; }
  .site-nav a { margin-left: 16px; font-size: 13px; }
  main { padding: 38px 0 64px; }
  .hero h1 { font-size: 23px; }
  .post-title { font-size: 17.5px; }
  .post-header h1 { font-size: 23px; }
  .post-body { font-size: 16.5px; line-height: 1.9; }
  .post-nav { margin-top: 56px; }
}