/* SHUGE DH Exhibition v0.2 — 数字博物馆 × 学术实验室
 * 继承 v0.1 base,新增: evidence-card / citation-viewer /
 *                page-viewer-framework / map-placeholder / timeline
 * 视觉原则: 无渐变 / 无圆角 / 无 glassmorphism / 无 emoji / 无霓虹
 */

:root {
  --paper-white: #f7f3eb;
  --card-cream:  #efe9da;
  --rule-gray:   #c8bfa9;
  --muted-gray:  #8c8472;
  --archival-brown: #6b5944;
  --ink-charcoal:   #1a1a1a;
  --seal-red:       #8b3a2e;
  --evidence-tint:  #e8e0cd;
}

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

html, body {
  background: var(--paper-white);
  color: var(--ink-charcoal);
  font-family: 'Source Serif 4', 'Noto Serif CJK SC', 'Songti SC', 'STSong', serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--ink-charcoal); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--seal-red); }

.mono { font-family: 'IBM Plex Mono', 'Courier New', monospace; font-size: 0.9em; }
.dim  { color: var(--muted-gray); font-family: 'Source Sans 3', sans-serif; font-size: 0.85em; }
.verified { color: var(--seal-red); font-family: 'IBM Plex Mono', monospace; font-size: 0.85em; }
.warning  { color: #6b4f1f; font-family: 'IBM Plex Mono', monospace; font-size: 0.85em; }

/* ==== Masthead & nav (from v0.1) ==== */
.masthead {
  max-width: 820px; margin: 0 auto;
  padding: 3rem 1.5rem 1.5rem;
  border-bottom: 2px solid var(--ink-charcoal);
}
.masthead-title {
  font-size: 2rem; font-weight: 600;
  letter-spacing: 0.02em;
}
.masthead-subtitle {
  font-family: 'Source Serif 4', serif; font-style: italic;
  color: var(--archival-brown);
  font-size: 0.95rem; margin-top: 0.3rem;
}

.topnav {
  max-width: 820px; margin: 0 auto;
  padding: 0.7rem 1.5rem;
  border-bottom: 1px solid var(--rule-gray);
  display: flex; justify-content: space-between; align-items: baseline;
  font-family: 'Source Sans 3', sans-serif; font-size: 0.85rem;
}
.topnav-links a {
  margin-right: 1.5rem;
  text-decoration: none; padding-bottom: 2px;
}
.topnav-links a.active { border-bottom: 2px solid var(--seal-red); color: var(--seal-red); }
.topnav-meta { color: var(--muted-gray); font-family: 'IBM Plex Mono', monospace; font-size: 0.75rem; }

.body { max-width: 820px; margin: 0 auto; padding: 1.5rem; }

/* ==== Hero (from v0.1) ==== */
.hero {
  padding: 1.5rem 0 2.5rem;
  border-bottom: 1px solid var(--rule-gray);
  margin-bottom: 2rem;
}
.hero h1 { font-size: 1.8rem; margin-bottom: 0.5rem; }
.hero-lead { color: var(--archival-brown); font-style: italic; margin-bottom: 1rem; font-size: 0.95rem; }

.stat-row {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 1rem;
  margin: 1.5rem 0 0; padding: 1rem;
  background: var(--card-cream);
  border: 1px solid var(--rule-gray);
}
.stat { display: flex; flex-direction: column; align-items: center; }
.stat-value { font-family: 'IBM Plex Mono', monospace; font-size: 1.5rem; color: var(--ink-charcoal); font-weight: 500; }
.stat-label { font-family: 'Source Sans 3', sans-serif; font-size: 0.7rem; color: var(--muted-gray); margin-top: 0.2rem; text-transform: uppercase; letter-spacing: 0.05em; }

/* ==== Headings ==== */
h1 { font-size: 1.6rem; margin: 2.5rem 0 1rem; line-height: 1.3; }
h2 { font-size: 1.3rem; margin: 2rem 0 0.8rem; line-height: 1.3; border-bottom: 1px solid var(--rule-gray); padding-bottom: 0.3rem; }
h3 { font-size: 1.05rem; margin: 1.5rem 0 0.5rem; font-weight: 600; }
p  { margin: 0.8rem 0; }

/* ==== Cards (from v0.1) ==== */
.card {
  background: var(--card-cream);
  border: 1px solid var(--rule-gray);
  padding: 1.2rem;
  margin: 1rem 0;
}
.card-header {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 0.5rem;
}
.card-title { font-size: 1.05rem; font-weight: 600; }
.card-en { font-family: 'Source Serif 4', serif; font-style: italic; color: var(--archival-brown); font-size: 0.9rem; }

.works-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem;
  margin: 1rem 0;
}

.badge {
  display: inline-block;
  font-family: 'IBM Plex Mono', monospace; font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  border: 1px solid var(--ink-charcoal);
  background: var(--paper-white);
}
.badge-jda { border-color: #2c4a3e; color: #2c4a3e; }
.badge-evidence { border-color: #4a2c3e; color: #4a2c3e; }
.badge-highlight { border-color: #6b4f1f; color: #6b4f1f; }
.badge-status-open   { border-color: #2c4a3e; color: #2c4a3e; }
.badge-status-briefready   { border-color: #2c4a3e; color: #2c4a3e; }
.badge-status-insufficientevidence { border-color: #6b4f1f; color: #6b4f1f; }
.badge-status-searching { border-color: #6b5944; color: #6b5944; }
.badge-collection-hydrology { border-color: #2c4a5e; color: #2c4a5e; }
.badge-collection-architecture { border-color: #5e2c4a; color: #5e2c4a; }

.meta-table {
  width: 100%; border-collapse: collapse;
  font-size: 0.88rem;
  margin: 0.7rem 0;
}
.meta-table th, .meta-table td {
  text-align: left; padding: 0.4rem 0.6rem;
  border-bottom: 1px solid var(--rule-gray);
  font-family: 'Source Sans 3', sans-serif;
}
.meta-table th {
  font-weight: 500; color: var(--archival-brown);
  width: 30%; vertical-align: top;
}
.meta-table td { font-family: 'IBM Plex Mono', monospace; font-size: 0.85rem; }

/* ==== Run accordion (from v0.1) ==== */
.run {
  border: 1px solid var(--rule-gray);
  margin: 0.6rem 0;
  background: var(--paper-white);
}
.run-summary {
  padding: 0.7rem 1rem;
  cursor: pointer;
  display: flex; justify-content: space-between; align-items: baseline;
  font-family: 'Source Sans 3', sans-serif;
}
.run-summary:hover { background: var(--evidence-tint); }
.run-question { font-size: 0.95rem; flex: 1; }
.run-meta { color: var(--muted-gray); font-family: 'IBM Plex Mono', monospace; font-size: 0.75rem; margin-left: 1rem; }
.run-detail {
  display: none;
  padding: 1rem;
  border-top: 1px solid var(--rule-gray);
  background: var(--evidence-tint);
  font-size: 0.9rem;
}
.run.open .run-detail { display: block; }

.claim {
  padding: 0.7rem; margin: 0.5rem 0;
  border-left: 3px solid var(--seal-red);
  background: var(--paper-white);
}
.claim-type { font-family: 'IBM Plex Mono', monospace; font-size: 0.75rem; color: var(--archival-brown); }
.claim-text { margin: 0.3rem 0; font-family: 'Source Serif 4', serif; }
.claim-cite { font-family: 'IBM Plex Mono', monospace; font-size: 0.75rem; color: var(--muted-gray); }

.citation {
  padding: 0.7rem; margin: 0.5rem 0;
  border-left: 3px solid var(--rule-gray);
  background: var(--paper-white);
  font-family: 'Source Sans 3', sans-serif;
  font-size: 0.85rem;
}

.filter-row {
  padding: 0.7rem 1rem;
  background: var(--card-cream);
  border: 1px solid var(--rule-gray);
  margin: 1rem 0;
  font-family: 'Source Sans 3', sans-serif;
  font-size: 0.85rem;
}
.filter-row label { margin-right: 1rem; cursor: pointer; }

/* ==== NEW in v0.2: Evidence Card ==== */
.evidence-card {
  background: var(--paper-white);
  border: 1px solid var(--rule-gray);
  border-left: 4px solid var(--seal-red);
  padding: 1rem 1.2rem;
  margin: 1rem 0;
}
.evidence-card-header {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 0.7rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px dashed var(--rule-gray);
}
.evidence-card-question {
  font-size: 1rem;
  font-family: 'Source Serif 4', serif;
  flex: 1;
}
.evidence-card-meta {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.75rem;
  color: var(--muted-gray);
  margin-left: 1rem;
  white-space: nowrap;
}
.evidence-card-meta .run-id {
  color: var(--ink-charcoal);
  font-weight: 500;
}

.evidence-claim-block {
  margin: 0.6rem 0;
  padding: 0.6rem 0.8rem;
  background: var(--evidence-tint);
  border-left: 2px solid var(--archival-brown);
}
.evidence-claim-meta {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  color: var(--archival-brown);
  margin-bottom: 0.3rem;
}
.evidence-claim-text {
  font-family: 'Source Serif 4', serif;
  font-size: 0.92rem;
  line-height: 1.6;
}

.evidence-ledger-toggle {
  margin-top: 0.6rem;
  font-family: 'Source Sans 3', sans-serif;
  font-size: 0.78rem;
  color: var(--archival-brown);
  cursor: pointer;
  user-select: none;
}
.evidence-ledger-toggle:hover { color: var(--seal-red); }
.evidence-ledger {
  display: none;
  margin-top: 0.4rem;
  padding: 0.6rem;
  background: var(--card-cream);
  border: 1px solid var(--rule-gray);
  font-size: 0.78rem;
}
.evidence-ledger.open { display: block; }
.evidence-ledger-row {
  padding: 0.25rem 0;
  border-bottom: 1px dotted var(--rule-gray);
  display: grid;
  grid-template-columns: 18ch 8ch 14ch 6ch 4ch;
  gap: 0.5rem;
  align-items: baseline;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.75rem;
}
.evidence-ledger-row:last-child { border-bottom: none; }
.evidence-ledger-row .selected-yes { color: var(--seal-red); }

/* ==== NEW in v0.2: Citation Viewer ==== */
.citation-viewer {
  display: none;
  position: relative;
  margin: 0.7rem 0;
  padding: 1rem;
  background: var(--card-cream);
  border: 1px solid var(--rule-gray);
  border-left: 4px solid var(--ink-charcoal);
  font-size: 0.88rem;
}
.citation-viewer.open { display: block; }
.citation-viewer-close {
  position: absolute; top: 0.5rem; right: 0.7rem;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.8rem; cursor: pointer;
  color: var(--muted-gray);
}
.citation-viewer-close:hover { color: var(--seal-red); }

.citation-viewer-field {
  margin: 0.3rem 0;
  font-family: 'Source Sans 3', sans-serif;
}
.citation-viewer-field-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.7rem;
  color: var(--archival-brown);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-right: 0.5rem;
}

/* ==== NEW in v0.2: Page Image Viewer Framework ==== */
.page-viewer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1rem 0;
}
.page-viewer {
  background: var(--paper-white);
  border: 1px solid var(--rule-gray);
  padding: 0.8rem;
}
.page-viewer-frame {
  width: 100%;
  aspect-ratio: 4 / 5;
  background: var(--card-cream);
  border: 1px dashed var(--rule-gray);
  display: flex; align-items: center; justify-content: center;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.75rem;
  color: var(--muted-gray);
  text-align: center;
  padding: 1rem;
}
.page-viewer-frame.framework-only::before {
  content: 'IIIF canvas placeholder\Av0.2 framework — image disabled';
  white-space: pre-line;
}
.page-viewer figcaption {
  margin-top: 0.5rem;
  font-family: 'Source Sans 3', sans-serif;
  font-size: 0.75rem;
  color: var(--muted-gray);
  text-align: center;
}
.page-viewer figcaption .mono {
  display: block;
  color: var(--ink-charcoal);
  margin-bottom: 0.2rem;
}

/* ==== NEW in v0.2: Map Placeholder ==== */
.map-placeholder {
  margin: 1.5rem 0;
  padding: 1rem;
  background: var(--card-cream);
  border: 1px solid var(--rule-gray);
}
.map-placeholder svg {
  width: 100%;
  height: auto;
  background: var(--paper-white);
  border: 1px solid var(--rule-gray);
}
.map-placeholder .map-note {
  margin-top: 0.7rem;
  font-family: 'Source Sans 3', sans-serif;
  font-size: 0.78rem;
  color: var(--muted-gray);
}
.map-placeholder-tooltip {
  position: absolute;
  padding: 0.3rem 0.6rem;
  background: var(--ink-charcoal);
  color: var(--paper-white);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  pointer-events: none;
  display: none;
  z-index: 10;
}
.map-placeholder-tooltip.show { display: block; }

/* ==== NEW in v0.2: Timeline ==== */
.timeline {
  margin: 1.5rem 0;
  padding: 0;
}
.timeline-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 1rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--rule-gray);
  align-items: baseline;
}
.timeline-stage {
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 500;
  color: var(--seal-red);
  font-size: 0.85rem;
}
.timeline-name { font-family: 'Source Serif 4', serif; font-weight: 500; }
.timeline-output {
  font-family: 'Source Sans 3', sans-serif;
  font-size: 0.85rem;
  color: var(--archival-brown);
  margin-top: 0.15rem;
}
.timeline-status {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  margin-top: 0.15rem;
}
.timeline-status-complete { color: #2c4a3e; }
.timeline-status-in-progress { color: var(--seal-red); }

/* ==== Take-away (v0.2 new, end of each room) ==== */
.takeaway {
  margin: 2.5rem 0 1rem;
  padding: 1.2rem 1.5rem;
  background: var(--card-cream);
  border-left: 4px solid var(--seal-red);
  font-family: 'Source Serif 4', serif;
  font-style: italic;
  font-size: 1rem;
  line-height: 1.7;
}
.takeaway-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  color: var(--seal-red);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-style: normal;
  margin-bottom: 0.4rem;
}

/* ==== Footer ==== */
footer {
  max-width: 820px; margin: 3rem auto 2rem;
  padding: 1.5rem;
  border-top: 2px solid var(--ink-charcoal);
  font-family: 'Source Sans 3', sans-serif;
  font-size: 0.78rem;
  color: var(--archival-brown);
}
footer p { margin: 0.3rem 0; }

@media (max-width: 768px) {
  .stat-row { grid-template-columns: repeat(3, 1fr); }
  .works-grid { grid-template-columns: 1fr; }
  .evidence-ledger-row {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }
  .timeline-item { grid-template-columns: 60px 1fr; }
}