.investigation-head {
  max-width: 920px;
  margin: 0 auto;
  padding: 3.5rem 1.25rem 1.5rem;
}

.investigation-head h1 {
  max-width: 18ch;
  font-size: clamp(2.6rem, 6vw, 4.8rem);
}

.question-block {
  margin: 1.5rem 0 0;
  padding: 1.2rem 1.35rem;
  border-left: 4px solid var(--gold);
  background: rgba(224,182,91,.06);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.question-block p:last-child {
  margin-bottom: 0;
  font-family: Georgia, serif;
  font-size: clamp(1.35rem, 3vw, 1.8rem);
  line-height: 1.35;
}

.investigation-reading {
  max-width: 920px;
  margin: 0 auto;
  padding: 1rem 1.25rem 5rem;
}

.investigation-reading > section {
  margin-top: 4rem;
  scroll-margin-top: 1.25rem;
}

.investigation-reading > section:first-child {
  margin-top: 1rem;
}

.investigation-reading h2 {
  margin: 0 0 1rem;
}

.investigation-reading h3 {
  margin: 1.8rem 0 .65rem;
}

.section-intro {
  max-width: 44rem;
  color: var(--muted);
}

.table-wrap {
  width: 100%;
  margin-top: 1.25rem;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  scrollbar-gutter: stable;
}

.table-wrap:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 3px;
}

.table-wrap table {
  width: 100%;
  min-width: 820px;
  margin: 0;
  border-collapse: collapse;
}

.table-wrap th,
.table-wrap td {
  vertical-align: top;
}

.table-wrap tr:last-child th,
.table-wrap tr:last-child td {
  border-bottom: 0;
}

.research-snapshot {
  border: 1px solid #4b4937;
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(224,182,91,.08), rgba(255,255,255,.015));
  padding: 1.4rem;
}

.snapshot-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .8rem;
}

.snapshot-item {
  min-height: 112px;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(16,21,16,.42);
}

.snapshot-label {
  display: block;
  color: var(--faint);
  font-size: .82rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.snapshot-value {
  display: block;
  margin-top: .35rem;
  font-size: 1.08rem;
  font-weight: 800;
}

.snapshot-note {
  display: block;
  margin-top: .3rem;
  color: var(--muted);
  font-size: .92rem;
  line-height: 1.45;
}

.answer-box .answer-meta {
  color: var(--faint);
  font-size: .92rem;
  font-weight: 700;
}

.fact-list,
.unknown-list,
.checklist,
.revision-list,
.timeline {
  list-style: none;
  padding: 0;
}

.fact-list li,
.unknown-list li {
  position: relative;
  padding: .8rem 0 .8rem 2rem;
  border-bottom: 1px solid var(--line);
}

.fact-list li::before,
.unknown-list li::before {
  position: absolute;
  left: 0;
  top: .78rem;
  font-weight: 900;
}

.fact-list li::before {
  content: "✓";
  color: var(--green);
}

.unknown-list li::before {
  content: "?";
  color: var(--orange);
}

.timeline {
  position: relative;
  margin: 1.5rem 0 0 .5rem;
  padding-left: 1.8rem;
  border-left: 2px solid var(--line);
}

.timeline li {
  position: relative;
  padding: 0 0 1.7rem .4rem;
}

.timeline li:last-child {
  padding-bottom: 0;
}

.timeline li::before {
  content: "";
  position: absolute;
  left: -2.28rem;
  top: .38rem;
  width: .72rem;
  height: .72rem;
  border: 3px solid var(--bg);
  border-radius: 999px;
  background: var(--gold);
  box-shadow: 0 0 0 1px var(--gold);
}

.timeline time {
  display: block;
  color: var(--gold-bright);
  font-size: .9rem;
  font-weight: 800;
  letter-spacing: .03em;
}

.timeline p {
  margin: .25rem 0 0;
}

.source-groups {
  display: grid;
  gap: .9rem;
}

.source-groups details {
  margin: 0;
}

.source-groups ul {
  margin-bottom: 0;
}

.field-note {
  margin: 1rem 0;
  padding: 1.2rem 1.35rem;
  border: 1px solid #4c4939;
  border-left: 4px solid var(--gold);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: #1c2019;
}

.field-note h3 {
  margin: 0 0 .55rem;
  font-size: 1.05rem;
  color: var(--gold-bright);
}

.field-note p:last-child {
  margin-bottom: 0;
}

.checklist li {
  position: relative;
  padding: .75rem 0 .75rem 2rem;
  border-bottom: 1px solid var(--line);
}

.checklist li::before {
  content: "";
  position: absolute;
  left: .1rem;
  top: 1rem;
  width: .82rem;
  height: .82rem;
  border: 2px solid var(--faint);
  border-radius: 3px;
}

.revision-list li {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: 1rem;
  padding: .85rem 0;
  border-bottom: 1px solid var(--line);
}

.revision-list time {
  color: var(--gold-bright);
  font-weight: 800;
}

.learning-box,
.help-improve {
  padding: 1.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.learning-box {
  border-color: #3e5142;
}

.help-improve {
  background: linear-gradient(145deg, rgba(224,182,91,.08), rgba(255,255,255,.015));
}

.evidence-access {
  margin-top: 1rem;
  padding: 1rem 1.15rem;
  border-left: 4px solid var(--orange);
  background: rgba(216,154,103,.07);
  border-radius: 0 12px 12px 0;
}

.quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  margin: 1.25rem 0 0;
}

.quick-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: .55rem .8rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  text-decoration: none;
  font-size: .92rem;
}

.quick-links a:hover {
  color: var(--text);
  border-color: var(--gold);
}

@media (max-width: 820px) {
  .investigation-reading > section {
    margin-top: 3.25rem;
  }

  .snapshot-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .revision-list li {
    grid-template-columns: 1fr;
    gap: .2rem;
  }

  .table-wrap::after {
    content: "Swipe or scroll to see the full comparison.";
    display: block;
    position: sticky;
    left: 0;
    padding: .65rem .8rem;
    color: var(--muted);
    background: var(--panel);
    border-top: 1px solid var(--line);
    font-size: .85rem;
  }
}

@media (max-width: 480px) {
  .investigation-head {
    padding-top: 2.5rem;
  }

  .investigation-head h1 {
    font-size: 2.55rem;
  }

  .snapshot-grid {
    grid-template-columns: 1fr;
  }

  .snapshot-item {
    min-height: auto;
  }
}