:root {
  color-scheme: light;
  --bg: #fff;
  --text: #111;
  --muted: #777;
  --faint: #f5f5f5;
  --line: #ebebeb;
  --accent: #0057d9;
  --w: 640px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
}

a { color: inherit; text-decoration: none; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px max(24px, calc((100vw - var(--w)) / 2));
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}

.brand {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

.nav { display: flex; align-items: center; gap: 18px; }

.nav > a {
  font-size: 13px;
  color: var(--muted);
  transition: color .15s;
}

.nav > a:hover { color: var(--text); }
.nav > a.active { color: var(--text); font-weight: 600; }

.nav-dropdown { position: relative; }

.dropdown-btn {
  display: flex;
  align-items: center;
  gap: 2px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 13px;
  color: var(--muted);
  padding: 0;
  font-family: inherit;
  transition: color .15s;
}

.dropdown-btn:hover { color: var(--text); }
.nav-dropdown.active .dropdown-btn { color: var(--text); font-weight: 600; }

.dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 5px 0;
  min-width: 108px;
  box-shadow: 0 4px 16px rgba(0,0,0,.08);
  z-index: 100;
}

.dropdown-menu a {
  display: block;
  padding: 7px 16px;
  font-size: 13px;
  color: var(--muted);
  transition: color .15s, background .15s;
}

.dropdown-menu a:hover { color: var(--text); background: var(--faint); }
.dropdown-menu a.active { color: var(--text); font-weight: 600; background: var(--faint); }

@media (hover: hover) {
  .nav-dropdown:hover .dropdown-menu { display: block; }
}

.nav-dropdown.open .dropdown-menu { display: block; }

.site-main {
  max-width: var(--w);
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.author {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 24px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--text);
  color: #fff;
  font-size: 17px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.author-handle { font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 2px; }
.author-bio { font-size: 12px; color: var(--muted); margin-bottom: 5px; }
.author-links a { font-size: 12px; color: var(--muted); }
.author-links a:hover { color: var(--accent); }

.section-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: #aaa;
  margin-bottom: 2px;
}

.post-card {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 0 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.post-date {
  font-size: 12px;
  color: var(--muted);
  padding-top: 3px;
  font-variant-numeric: tabular-nums;
  line-height: 1.5;
}

.post-info h2 { font-size: 17px; font-weight: 600; line-height: 1.4; margin-bottom: 5px; }
.post-info h2 a { color: var(--text); }
.post-info h2 a:hover { color: var(--accent); }

.post-info p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 8px;
}

.post-cats { display: flex; gap: 6px; flex-wrap: wrap; }

.post-cat,
.project-tech-tag,
.code-card-tag {
  font-size: 11px;
  color: #777;
  background: var(--faint);
  padding: 2px 8px;
  border-radius: 3px;
}

.post-cat:hover { color: var(--accent); background: #eef2ff; }

.pagination {
  display: flex;
  justify-content: space-between;
  padding-top: 24px;
  font-size: 13px;
}

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

.post-head {
  margin-bottom: 36px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.post-head h1 {
  font-size: clamp(22px, 4vw, 28px);
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 12px;
}

.meta { font-size: 13px; color: var(--muted); display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.meta-tags { display: inline-flex; gap: 8px; flex-wrap: wrap; }
.meta a { color: var(--muted); }
.meta a:hover { color: var(--accent); }

.post-body { font-size: 15px; line-height: 1.8; overflow-wrap: anywhere; }
.post-body h1, .post-body h2, .post-body h3, .post-body h4 { margin: 1.8em 0 .5em; line-height: 1.3; }
.post-body h1 { font-size: 22px; }
.post-body h2 { font-size: 20px; }
.post-body h3 { font-size: 17px; }
.post-body p { margin: .8em 0; }
.post-body a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
.post-body img { max-width: 100%; height: auto; display: block; margin: 1.2em 0; }
.post-body pre { background: var(--faint); padding: 14px 16px; border-radius: 4px; overflow: auto; font-size: 13px; line-height: 1.6; margin: 1em 0; }
.post-body code { background: var(--faint); padding: 1px 5px; border-radius: 3px; font-size: .9em; font-family: ui-monospace, "SF Mono", Consolas, monospace; }
.post-body pre code { background: none; padding: 0; font-size: inherit; }
.post-body ol, .post-body ul { padding-left: 1.5em; margin: .8em 0; }
.post-body li { margin: .3em 0; }
.post-body blockquote { border-left: 3px solid var(--line); padding-left: 16px; color: var(--muted); margin: 1em 0; }
.post-body table { border-collapse: collapse; width: 100%; margin: 1em 0; font-size: 14px; }
.post-body th, .post-body td { border: 1px solid var(--line); padding: 7px 12px; text-align: left; }
.post-body th { background: var(--faint); font-weight: 600; }

.archive-list { padding: 0; list-style: none; }
.archive-list li { display: grid; grid-template-columns: 88px 1fr; gap: 0 20px; padding: 11px 0; border-bottom: 1px solid var(--line); align-items: baseline; }
.archive-list time { font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }
.archive-list a { font-size: 15px; color: var(--text); }
.archive-list a:hover { color: var(--accent); }

.taxonomy-list { padding: 0; list-style: none; }
.taxonomy-list li { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--line); }
.taxonomy-list a { font-size: 15px; color: var(--text); }
.taxonomy-list a:hover { color: var(--accent); }
.taxonomy-list span { font-size: 12px; color: var(--muted); background: var(--faint); padding: 2px 8px; border-radius: 3px; }

.code-card,
.project-card {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.code-card-meta {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 6px;
}

.code-card-meta time,
.project-date {
  font-size: 12px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.code-card-tag {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.code-card-title { font-size: 17px; font-weight: 600; margin-bottom: 5px; }
.code-card-desc { font-size: 13px; color: var(--muted); margin-bottom: 10px; }

.code-expand summary {
  font-size: 13px;
  color: var(--accent);
  cursor: pointer;
  user-select: none;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.code-expand summary::-webkit-details-marker { display: none; }
.code-expand[open] summary { margin-bottom: 10px; }

.code-expand pre {
  background: var(--faint);
  padding: 14px 16px;
  border-radius: 4px;
  overflow: auto;
  font-size: 12px;
  line-height: 1.6;
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  margin-top: 10px;
}

.project-card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 6px;
}

.project-name { font-size: 17px; font-weight: 600; }
.project-name a { color: var(--text); }
.project-name a:hover { color: var(--accent); }
.project-date { flex-shrink: 0; padding-top: 3px; }
.project-desc { font-size: 13px; color: var(--muted); margin-bottom: 8px; }
.project-tech { display: flex; gap: 6px; flex-wrap: wrap; }

.placeholder {
  text-align: center;
  padding: 80px 0;
  color: var(--muted);
}

.placeholder-icon { font-size: 13px; letter-spacing: 1.5px; margin-bottom: 12px; color: #aaa; }
.placeholder p { font-size: 14px; }

.site-footer {
  display: flex;
  justify-content: center;
  gap: 16px;
  padding: 20px 24px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--muted);
}

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

@media (max-width: 540px) {
  .site-header { flex-wrap: wrap; gap: 8px; padding: 12px 16px; }
  .nav { gap: 12px; }

  .post-card { grid-template-columns: 1fr; gap: 4px; }
  .post-date { padding-top: 0; }

  .archive-list li { grid-template-columns: 1fr; gap: 2px; }

  .dropdown-menu { right: auto; left: 0; }
}