/* zdf's blog — minimal white reading theme */

:root {
  --text: #2b2b2b;
  --muted: #8a8a8a;
  --faint: #b5b5b5;
  --link: #1a73e8;
  --border: #ececec;
  --bg-code: #f7f7f5;
  --bg-note: #fff9ec;
  --border-note: #f0dfae;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: #fff;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 44rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---------- header ---------- */
.site-header { border-bottom: 1px solid var(--border); }

.site-nav {
  display: flex;
  align-items: baseline;
  gap: 1.4rem;
  padding: 1.15rem 0;
}

.site-title {
  font-weight: 700;
  font-size: 1.12rem;
  color: var(--text);
  text-decoration: none;
  margin-right: auto;
  letter-spacing: 0.01em;
}

.nav-link {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.94rem;
}

.nav-link:hover { color: var(--text); }

/* ---------- content ---------- */
.content { padding-top: 2.6rem; padding-bottom: 3rem; min-height: 60vh; }

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

/* home */
.intro { color: var(--muted); margin-bottom: 2.6rem; font-size: 1.02rem; }
.intro p { margin: 0; }

.year {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--faint);
  letter-spacing: 0.08em;
  margin: 2.2rem 0 0.7rem;
  text-transform: uppercase;
}

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

.post-list li, .archive-list li {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 0.42rem 0;
  border-bottom: 1px dotted var(--border);
}

.post-list .date, .archive-list .date {
  flex: 0 0 3.2rem;
  color: var(--faint);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
}

.post-list a, .archive-list a { color: var(--text); }
.post-list a:hover, .archive-list a:hover { color: var(--link); }

/* post */
.post-title {
  font-size: 1.75rem;
  line-height: 1.4;
  margin: 0 0 0.5rem;
  letter-spacing: 0.01em;
}

.post-meta { color: var(--muted); font-size: 0.9rem; margin: 0 0 2rem; }

.old-post-note {
  background: var(--bg-note);
  border: 1px solid var(--border-note);
  border-radius: 6px;
  padding: 0.7rem 1rem;
  font-size: 0.9rem;
  color: #8a6d1b;
  margin-bottom: 2rem;
}

.post-content h1, .post-content h2, .post-content h3,
.post-content h4, .post-content h5,
.page-content h1, .page-content h2, .page-content h3 {
  line-height: 1.5;
  margin: 2.2em 0 0.9em;
  letter-spacing: 0.01em;
}
.post-content h2, .page-content h2 { font-size: 1.35rem; }
.post-content h3, .page-content h3 { font-size: 1.15rem; }
.post-content h4, .post-content h5 { font-size: 1rem; }

.post-content p, .page-content p { margin: 0 0 1.2em; }

.post-content img, .page-content img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1.5rem auto;
  border-radius: 4px;
}

.post-content blockquote, .page-content blockquote {
  margin: 1.5em 0;
  padding: 0.2em 0 0.2em 1.1em;
  border-left: 3px solid var(--border);
  color: var(--muted);
}
.post-content blockquote p:last-child,
.page-content blockquote p:last-child { margin-bottom: 0; }

.post-content code, .page-content code {
  font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.86em;
  background: var(--bg-code);
  padding: 0.12em 0.35em;
  border-radius: 4px;
}

.post-content pre, .page-content pre {
  background: var(--bg-code);
  border-radius: 8px;
  padding: 1rem 1.2rem;
  overflow-x: auto;
  line-height: 1.6;
}
.post-content pre code, .page-content pre code {
  background: none;
  padding: 0;
}

.post-content table, .page-content table {
  border-collapse: collapse;
  width: 100%;
  margin: 1.5em 0;
  font-size: 0.92rem;
}
.post-content th, .post-content td,
.page-content th, .page-content td {
  border: 1px solid var(--border);
  padding: 0.5em 0.8em;
  text-align: left;
}
.post-content th, .page-content th { background: var(--bg-code); }

.post-content hr, .page-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.5em 0;
}

.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3.5rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--border);
  font-size: 0.92rem;
}
.post-nav .next { margin-left: auto; text-align: right; }
.post-nav a { color: var(--muted); }
.post-nav a:hover { color: var(--link); }

/* page */
.page-title {
  font-size: 1.6rem;
  margin: 0 0 1.6rem;
  letter-spacing: 0.01em;
}

/* tags */
.tag-cloud { margin: 0 0 2.5rem; }
.tag-cloud a {
  display: inline-block;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.25rem 0.9rem;
  margin: 0 0.5rem 0.6rem 0;
  font-size: 0.9rem;
  color: var(--muted);
}
.tag-cloud a:hover { color: var(--link); border-color: var(--link); text-decoration: none; }
.tag-group { margin-bottom: 2rem; }
.tag-group h3 { font-size: 1.05rem; margin: 0 0 0.6rem; }
.tag-group ul { list-style: none; margin: 0; padding: 0; }
.tag-group li { padding: 0.3rem 0; border-bottom: 1px dotted var(--border); }
.tag-group .date { color: var(--faint); font-size: 0.85rem; margin-right: 0.8rem; }

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.6rem 0 2.2rem;
  color: var(--faint);
  font-size: 0.88rem;
}
.site-footer p { margin: 0; }
.site-footer a { color: var(--muted); }

/* ---------- responsive ---------- */
@media (max-width: 560px) {
  body { font-size: 16px; }
  .post-title { font-size: 1.45rem; }
  .site-nav { gap: 1rem; }
  .post-list li, .archive-list li { gap: 0.7rem; }
}