:root {
  --fg: #1a1a1a;
  --bg: #fdfdfc;
  --muted: #6b6b6b;
  --line: #e4e2dd;
  --accent: #a4481f;
  --code-bg: #f3f1ec;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e6e3dd;
    --bg: #16151a;
    --muted: #9a968e;
    --line: #2e2c34;
    --accent: #e08a5c;
    --code-bg: #201f26;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  padding: 0 1.15rem;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  font-size: 17px;
  line-height: 1.8;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.site-header,
main,
.site-footer {
  max-width: 42rem;
  margin: 0 auto;
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.35rem 1rem;
  padding: 1.6rem 0 1.1rem;
  border-bottom: 1px solid var(--line);
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

nav { display: flex; gap: 1.1rem; font-size: 0.94rem; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.brand, nav a { color: var(--fg); }
nav a.on { color: var(--accent); }

main { padding: 2rem 0 3rem; }

h1 { font-size: 1.55rem; line-height: 1.4; margin: 0 0 1rem; letter-spacing: -0.01em; }
h2 { font-size: 1.18rem; line-height: 1.5; margin: 2.2rem 0 0.7rem; }
h3 { font-size: 1.04rem; margin: 1.7rem 0 0.5rem; }

p { margin: 0 0 1.05rem; }

.hero { padding: 0 0 0.5rem; }
.tagline {
  font-size: 1.22rem;
  line-height: 1.7;
  margin: 0 0 1.2rem;
  letter-spacing: -0.005em;
}

.section-title {
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin: 1.4rem 0 0.4rem;
  text-transform: uppercase;
}

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

.post-item {
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--line);
}
.post-item:last-child { border-bottom: 0; }

.post-link { font-size: 1.06rem; font-weight: 600; display: inline; }

.post-item time {
  display: block;
  font-size: 0.8rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  margin-top: 0.15rem;
}

.summary { margin: 0.4rem 0 0; color: var(--muted); font-size: 0.94rem; line-height: 1.65; }

.post-meta { color: var(--muted); font-size: 0.85rem; margin: -0.5rem 0 1.6rem; font-variant-numeric: tabular-nums; }

.post-body { margin-top: 0.5rem; }
.post-body ul, .post-body ol { padding-left: 1.35rem; margin: 0 0 1.1rem; }
.post-body li { margin: 0.35rem 0; }

blockquote {
  margin: 1.3rem 0;
  padding: 0.15rem 0 0.15rem 1rem;
  border-left: 3px solid var(--line);
  color: var(--muted);
}
blockquote p:last-child { margin-bottom: 0; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.88em;
  background: var(--code-bg);
  padding: 0.12em 0.34em;
  border-radius: 4px;
}

pre {
  background: var(--code-bg);
  padding: 0.9rem 1rem;
  border-radius: 8px;
  overflow-x: auto;
  margin: 1.3rem 0;
  -webkit-overflow-scrolling: touch;
}
pre code { background: none; padding: 0; font-size: 0.82rem; line-height: 1.65; }

hr { border: 0; border-top: 1px solid var(--line); margin: 2rem 0; }

.back { margin-top: 2.4rem; font-size: 0.94rem; }

.site-footer {
  padding: 1.6rem 0 2.6rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.86rem;
}
.site-footer p { margin: 0.2rem 0; }

.empty { color: var(--muted); }

@media (max-width: 420px) {
  body { font-size: 16.5px; padding: 0 1rem; line-height: 1.78; }
  h1 { font-size: 1.4rem; }
  .tagline { font-size: 1.12rem; }
  nav { gap: 0.95rem; font-size: 0.9rem; }
}