/* The Original-Source Problem
   Page-specific additions only.
   Core typography, article layout, tables and mobile-data styling
   are provided by the site's main stylesheet.
*/


/* Investigation metadata */

.article-content .research-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 0 0 42px;
  padding: 15px 0;
  color: var(--muted);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.5;
}

.article-content .research-meta span {
  white-space: nowrap;
}

.article-content .research-meta strong {
  color: var(--ink);
  font-weight: 600;
}


/* Shared research callouts */

.article-content .investigation-note,
.article-content .finding-box,
.article-content .method-card,
.article-content .principle-box {
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: #fffdfa;
}

.article-content .investigation-note {
  margin: 28px 0 30px;
  padding: 21px 24px;
  border-left: 4px solid var(--orange);
}

.article-content .investigation-note p,
.article-content .finding-box p,
.article-content .method-card p,
.article-content .principle-box p {
  font-size: 16px;
  line-height: 1.7;
}

.article-content .investigation-note p:last-child,
.article-content .finding-box p:last-child,
.article-content .method-card p:last-child,
.article-content .principle-box p:last-child {
  margin-bottom: 0;
}


/* Method and comparison grids */

.article-content .method-grid,
.article-content .evidence-grid,
.article-content .comparison-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 23px 0 31px;
}

.article-content .method-card,
.article-content .principle-box {
  padding: 20px 21px;
}

.article-content .method-card h3,
.article-content .principle-box h3 {
  margin: 0 0 9px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.35;
}


/* Case studies */

.article-content .case-study {
  margin: 56px 0 64px;
}

.article-content .case-study + .case-study {
  padding-top: 5px;
  border-top: 1px solid var(--line);
}

.article-content .case-kicker {
  display: block;
  margin-bottom: 8px;
  color: var(--orange);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .085em;
  line-height: 1.4;
  text-transform: uppercase;
}

.article-content .case-study > h3 {
  margin: 0 0 18px;
  color: var(--ink);
  font-size: 27px;
  line-height: 1.3;
}


/* Citation-chain diagrams */

.article-content .chain-figure {
  margin: 29px 0 31px;
  padding: 20px 22px 18px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: #fff;
}

.article-content .chain-figure figcaption {
  margin-bottom: 17px;
  color: var(--orange);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .075em;
  line-height: 1.4;
  text-transform: uppercase;
}

.article-content .citation-chain {
  position: relative;
  padding: 0;
  margin: 0;
  list-style: none;
}

.article-content .citation-chain::before {
  position: absolute;
  top: 10px;
  bottom: 12px;
  left: 6px;
  width: 1px;
  background: var(--line-strong);
  content: "";
}

.article-content .citation-chain li {
  position: relative;
  padding: 0 0 20px 31px;
  margin: 0;
}

.article-content .citation-chain li:last-child {
  padding-bottom: 0;
}

.article-content .citation-chain li::before {
  position: absolute;
  top: 9px;
  left: 1px;
  width: 11px;
  height: 11px;
  background: var(--paper);
  border: 2px solid var(--orange);
  border-radius: 50%;
  content: "";
}

.article-content .citation-chain strong {
  display: block;
  margin-bottom: 2px;
  color: var(--ink);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

.article-content .citation-chain span {
  display: block;
  color: #555b64;
  font-size: 15px;
  line-height: 1.65;
}


/* Findings */

.article-content .finding-box {
  padding: 19px 21px;
}

.article-content .finding-box > strong:first-child {
  display: block;
  margin-bottom: 6px;
  color: var(--ink);
  font-size: 16px;
  font-weight: 600;
}


/* Horizontal process diagrams */

.article-content .chain-inline {
  display: flex;
  align-items: stretch;
  gap: 9px;
  margin: 25px 0;
  overflow-x: auto;
  padding: 2px 0 8px;
}

.article-content .chain-inline .node {
  flex: 1 0 150px;
  min-width: 150px;
  padding: 14px 15px;
  color: #4b515a;
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  font-size: 14px;
  line-height: 1.5;
}

.article-content .chain-inline .node strong {
  color: var(--ink);
  font-weight: 600;
}

/*
  Reset the site's global .arrow decoration inside these diagrams.
  Here .arrow is a textual connector, not the site's rotated border icon.
*/

.article-content .chain-inline .arrow {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  width: auto;
  height: auto;
  margin: 0;
  color: var(--orange);
  border: 0;
  font-size: 17px;
  font-weight: 600;
  transform: none;
}


/* Outcome table refinements */

.article-content .article-table .status {
  font-weight: 600;
}


/* Closing principle */

.article-content .closing-rule {
  margin: 34px 0 0;
  padding: 23px 25px;
  color: #40464f;
  background: #fff8f1;
  border: 1px solid var(--line-strong);
  border-left: 4px solid var(--orange);
  border-radius: 8px;
  font-size: 18px;
  line-height: 1.75;
}

.article-content .closing-rule strong {
  color: var(--ink);
  font-weight: 600;
}


/* Responsive additions */

@media (max-width: 720px) {
  .article-content .research-meta {
    display: block;
    margin-bottom: 34px;
  }

  .article-content .research-meta span {
    display: block;
    margin: 4px 0;
    white-space: normal;
  }

  .article-content .method-grid,
  .article-content .evidence-grid,
  .article-content .comparison-grid {
    grid-template-columns: 1fr;
  }

  .article-content .case-study {
    margin: 45px 0 52px;
  }

  .article-content .case-study > h3 {
    font-size: 23px;
  }

  .article-content .chain-figure {
    padding: 17px 17px 16px;
  }

  .article-content .citation-chain li {
    padding-left: 27px;
  }

  .article-content .chain-inline {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .article-content .chain-inline .node {
    min-width: 0;
  }

  .article-content .chain-inline .arrow {
    min-height: 30px;
    transform: rotate(90deg);
  }

  .article-content .closing-rule {
    padding: 19px 20px;
    font-size: 16.5px;
  }
}