/* ZGO — 极简静态站点样式 */

:root {
  --fg: #1a1a18;
  --muted: #6b6a64;
  --line: #e4e2da;
  --bg: #faf9f6;
  --card: #ffffff;
  --code-bg: #f0eee7;
  --accent: #2f6f4f;
  --max: 720px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e8e6e1;
    --muted: #9b988f;
    --line: #2b2a26;
    --bg: #17161a;
    --card: #1d1c20;
    --code-bg: #232227;
    --accent: #7fbf9b;
  }
}

* { box-sizing: border-box; }

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

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

a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: border-color .15s ease, color .15s ease;
}

a:hover { border-bottom-color: var(--fg); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 40px 24px 96px; }

/* ---------- 顶部 ---------- */

.site-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 48px;
}

.brand {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -.01em;
  border-bottom: 0;
}

.brand span { color: var(--muted); font-weight: 400; }

.site-nav { display: flex; gap: 20px; font-size: 14px; }
.site-nav a { border-bottom: 0; color: var(--muted); }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--fg); }

/* ---------- 首页 ---------- */

.intro h1 {
  font-size: 28px;
  font-weight: 600;
  margin: 0 0 10px;
  letter-spacing: -.02em;
  line-height: 1.3;
}

.lead { color: var(--muted); font-size: 15px; margin: 0; }

section { padding: 36px 0; border-bottom: 1px solid var(--line); }
section:last-of-type { border-bottom: 0; }

h2 {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 18px;
}

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

.post-list li {
  padding: 12px 0;
  display: flex;
  gap: 16px;
  align-items: baseline;
}

.post-list li + li { border-top: 1px solid var(--line); }

.date {
  color: var(--muted);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  flex: 0 0 88px;
}

.post-list a { border-bottom: 0; }
.post-list a:hover { color: var(--accent); }

.note { font-size: 14px; color: var(--muted); margin: 8px 0 0; }

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  font-size: 13px;
  color: var(--muted);
  margin-top: 14px;
}

/* ---------- 文章 ---------- */

article.post header { margin-bottom: 32px; }

article.post h1 {
  font-size: 25px;
  font-weight: 600;
  line-height: 1.4;
  margin: 0 0 12px;
  letter-spacing: -.015em;
}

.post-meta {
  font-size: 13px;
  color: var(--muted);
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-variant-numeric: tabular-nums;
}

.prose { max-width: 68ch; }

.prose p { margin: 0 0 20px; }

.prose h2 {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
  color: var(--fg);
  margin: 40px 0 14px;
}

.prose h3 {
  font-size: 15px;
  font-weight: 600;
  margin: 28px 0 10px;
}

.prose ul, .prose ol { margin: 0 0 20px; padding-left: 22px; }
.prose li { margin: 6px 0; }

.prose blockquote {
  margin: 24px 0;
  padding: 2px 0 2px 18px;
  border-left: 2px solid var(--line);
  color: var(--muted);
}

.prose hr { border: 0; border-top: 1px solid var(--line); margin: 36px 0; }

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin: 0 0 22px;
}

.prose th, .prose td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
}

.prose th { font-weight: 600; color: var(--muted); font-size: 12px; letter-spacing: .06em; text-transform: uppercase; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .9em;
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
}

pre {
  background: var(--code-bg);
  padding: 16px 18px;
  border-radius: 6px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.65;
  margin: 0 0 22px;
}

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

.tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 28px; }

.tag {
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px 10px;
}

.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.post-nav a { border-bottom: 0; color: var(--muted); }
.post-nav a:hover { color: var(--fg); }

/* ---------- 页脚 ---------- */

footer {
  padding-top: 36px;
  margin-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

footer a { border-bottom: 0; }
footer a:hover { color: var(--fg); }

/* ---------- 杂项 ---------- */

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

.center { text-align: center; }

.big-code {
  font-size: 64px;
  font-weight: 600;
  letter-spacing: -.04em;
  margin: 0;
  color: var(--line);
  line-height: 1;
}

@media (max-width: 520px) {
  .wrap { padding: 28px 18px 64px; }
  .site-header { margin-bottom: 32px; }
  .post-list li { flex-direction: column; gap: 2px; }
  .date { flex: none; }
  .intro h1 { font-size: 24px; }
}