:root {
  --bg: #f1eee6;
  --bg-deep: #e7e2d6;
  --paper: #fffcf6;
  --ink: #1c1915;
  --muted: #5c564d;
  --line: #d8d1c4;
  --accent: #143f33;
  --accent-soft: #d9ece4;
  --tag: #ece7dc;
  --tag-ink: #2a3d35;
  --shadow: 0 16px 40px rgba(40, 32, 18, 0.08);
  --radius: 18px;
  --sans: "Noto Sans CJK SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", ui-sans-serif, system-ui, sans-serif;
  --serif: "Noto Serif CJK SC", "Songti SC", "STSong", "SimSun", "Times New Roman", serif;
}
* { box-sizing: border-box; }
html { color-scheme: light; scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1200px 500px at 10% -10%, #fbf8f0 0%, transparent 60%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
}
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: #0b2b22; }
img { max-width: 100%; display: block; }
.wrap, .site-header, .site-footer, .page-status, .section-head, .card-list, .subcard-list, .prose-wrap, .about-intro {
  width: min(1080px, calc(100% - 2rem));
  margin-left: auto;
  margin-right: auto;
}
.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
  margin: 0 0 1.2rem;
  font-size: 0.92rem;
}
.site-nav a { color: var(--muted); text-decoration: none; }
.site-nav a:hover, .site-nav a.current { color: var(--accent); }
.site-nav a.current { font-weight: 600; }
.site-header { padding: 2.6rem 0 1.4rem; }
.eyebrow {
  margin: 0 0 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.72rem;
  color: var(--muted);
}
.site-header h1, .page-header h1 {
  font-family: var(--serif);
  font-weight: 650;
  letter-spacing: 0.02em;
  line-height: 1.25;
  margin: 0;
}
.site-header h1 { font-size: clamp(2rem, 5vw, 3.1rem); }
.page-header h1 { font-size: clamp(1.6rem, 4vw, 2.4rem); }
.lede, .summary { max-width: 42rem; }
.lede { margin: 0.85rem 0 0; font-size: 1.05rem; }
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 1.6rem 0 0.6rem;
}
.section-head h2 {
  font-family: var(--serif);
  font-size: 1.45rem;
  margin: 0;
}
.section-head p { margin: 0; color: var(--muted); }
.card-list, .subcard-list {
  display: grid;
  gap: 1.4rem;
  padding: 0.4rem 0 3rem;
}
.subcard-list { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1rem; padding-top: 0.2rem; padding-bottom: 1.6rem; }
.card, .subcard {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.card-link, .subcard-link {
  display: grid;
  color: inherit;
  text-decoration: none;
  min-height: 0;
}
.card-link {
  grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.3fr);
  min-height: 220px;
}
.card-link:hover, .subcard-link:hover { color: inherit; }
.card-link:hover .summary, .subcard-link:hover .summary { color: var(--accent); }
.media.placeholder {
  min-height: 220px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 0.8rem;
  padding: 1.2rem;
  background: linear-gradient(160deg, #1c3f35 0%, #31574b 42%, #c9b498 100%);
  color: #f6f1e8;
}
.placeholder-mark {
  width: 42px;
  height: 42px;
  border: 2px solid rgba(255, 252, 246, 0.75);
  border-radius: 10px;
  transform: rotate(12deg);
  position: relative;
}
.placeholder-mark::after {
  content: "";
  position: absolute;
  inset: 8px;
  border: 2px solid rgba(255, 252, 246, 0.55);
}
.placeholder-id {
  font-family: var(--serif);
  font-size: 1.45rem;
}
.card-body, .subcard-body { padding: 1.25rem 1.35rem 1.4rem; display: flex; flex-direction: column; gap: 0.7rem; }
.card-body .title {
  font-family: var(--serif);
  font-size: 1.45rem;
  line-height: 1.25;
  margin: 0;
}
.meta-row { display: flex; flex-wrap: wrap; gap: 0.5rem 0.9rem; align-items: center; color: var(--muted); font-size: 0.9rem; }
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; list-style: none; padding: 0; margin: 0; }
.tags li {
  background: var(--tag);
  color: var(--tag-ink);
  border-radius: 999px;
  padding: 0.15rem 0.7rem;
  font-size: 0.82rem;
}
.summary { margin: 0; color: var(--muted); }
.badge {
  margin: 0;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.75rem;
  padding: 0.1rem 0.55rem;
  border-radius: 999px;
  width: fit-content;
}
.badge.researching { background: #f3e4c8; color: #5a3d12; }
.badge.recorded { background: var(--tag); color: var(--tag-ink); }
.badge.parked, .badge.superseded { background: #eadfd6; color: #5c3f32; }
.subcard-link { height: 100%; }
.subcard-body { padding: 1.1rem 1.15rem 1.2rem; gap: 0.45rem; }
.subcard-body h3 { font-family: var(--serif); font-size: 1.15rem; margin: 0; }
.subcard-body p { margin: 0; color: var(--muted); font-size: 0.92rem; }
.subcard.current { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), var(--shadow); }
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  width: min(1080px, calc(100% - 2rem));
  margin: 0 auto 1.2rem;
}
.tabs a, .tabs span {
  display: inline-block;
  padding: 0.3rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink);
  text-decoration: none;
  font-size: 0.92rem;
}
.tabs a:hover { border-color: var(--accent); color: var(--accent); }
.tabs a.current, .tabs span.current {
  background: var(--accent);
  border-color: var(--accent);
  color: #fffcf6;
}
.page-header { width: min(1080px, calc(100% - 2rem)); margin: 0 auto; padding: 0 0 1rem; }
.back { display: inline-block; margin-bottom: 0.8rem; color: var(--muted); }
.prose-wrap { padding-bottom: 3.5rem; }
.prose {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem 1.6rem 2rem;
  overflow-x: auto;
}
.prose > :first-child { margin-top: 0; }
.prose h1, .prose h2, .prose h3, .prose h4 {
  font-family: var(--serif);
  line-height: 1.3;
  margin: 1.6rem 0 0.7rem;
}
.prose h1 { font-size: 1.7rem; }
.prose h2 { font-size: 1.35rem; padding-bottom: 0.35rem; border-bottom: 1px solid var(--line); }
.prose h3 { font-size: 1.12rem; }
.prose p, .prose ul, .prose ol { margin: 0 0 0.9rem; }
.prose li { margin: 0.2rem 0; }
.prose blockquote {
  margin: 0 0 1rem;
  padding: 0.2rem 0 0.2rem 1rem;
  border-left: 3px solid var(--accent);
  color: var(--ink);
}
.prose code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: var(--tag);
  padding: 0.05em 0.35em;
  border-radius: 5px;
  word-break: break-word;
}
.prose pre {
  background: #1c3f35;
  color: #f6f1e8;
  padding: 1rem 1.1rem;
  border-radius: 12px;
  overflow-x: auto;
  font-size: 0.88rem;
  line-height: 1.55;
}
.prose pre code { background: transparent; color: inherit; padding: 0; }
.prose pre.mermaid {
  background: #f6f3eb;
  color: var(--ink);
  border: 1px solid var(--line);
  text-align: center;
}
.prose table {
  border-collapse: collapse;
  width: 100%;
  min-width: 28rem;
  margin: 0 0 1.1rem;
  font-size: 0.92rem;
}
.prose th, .prose td {
  border: 1px solid var(--line);
  padding: 0.4rem 0.7rem;
  text-align: left;
  vertical-align: top;
}
.prose th { background: var(--bg); font-weight: 600; }
.prose tr:nth-child(even) td { background: #faf7f0; }
.toc {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.8rem 1rem;
  margin: 0 0 1.3rem;
}
.toc p { margin: 0 0 0.4rem; font-weight: 600; }
.toc ul { margin: 0; padding-left: 1.1rem; }
.notice {
  width: min(1080px, calc(100% - 2rem));
  margin: 0 auto 1.4rem;
  color: var(--muted);
  font-size: 0.9rem;
}
.about-intro {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem 1.4rem 1.35rem;
  margin: 0 auto 2rem;
}
.about-intro h2 { font-family: var(--serif); font-size: 1.3rem; margin: 0 0 0.7rem; }
.about-intro p { margin: 0 0 0.7rem; max-width: 46rem; }
.about-intro p:last-child { margin-bottom: 0; }
.page-status { margin: 0 auto 0.4rem; color: var(--muted); font-size: 0.95rem; }
.site-footer { padding: 0 0 2.5rem; color: var(--muted); font-size: 0.9rem; }
@media (max-width: 800px) {
  .card-link { grid-template-columns: 1fr; }
  .media.placeholder { min-height: 140px; }
  .card-body .title { font-size: 1.3rem; }
  .prose { padding: 1.1rem 1rem 1.4rem; }
  .prose table { font-size: 0.86rem; }
}
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
}