/* ═══════════════════════════════════════════════════════════
   GR SOURCE STACK — expandable source rows with optional
   embedded video + report content. Replaces the flat anchor
   pattern. Load once per theater page.
   ═══════════════════════════════════════════════════════════ */

:root {
  --src-tier-official:  #4ab0cc;  /* cyan — Tier 1 */
  --src-tier-wire:      #e6b95d;  /* amber — Tier 2 */
  --src-tier-think:     #8fd1a8;  /* green — Tier 3 */
  --src-tier-gr:        #d49fe6;  /* purple — Tier 4 */
  --src-tier-evergreen: #7aa3c4;  /* slate  — Tier 5 */
}

/* ── Layout scaffolding ───────────────────────────────────── */

.source-group {
  margin-bottom: 28px;
}
.source-group-label {
  font-family: var(--font-body, 'Inter', system-ui, sans-serif);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 10px;
  padding-left: 8px;
  border-left: 2px solid var(--border);
}
.source-group-label.tier-official  { border-left-color: var(--src-tier-official);  color: var(--src-tier-official); }
.source-group-label.tier-wire      { border-left-color: var(--src-tier-wire);      color: var(--src-tier-wire); }
.source-group-label.tier-think     { border-left-color: var(--src-tier-think);     color: var(--src-tier-think); }
.source-group-label.tier-gr        { border-left-color: var(--src-tier-gr);        color: var(--src-tier-gr); }
.source-group-label.tier-evergreen { border-left-color: var(--src-tier-evergreen); color: var(--src-tier-evergreen); }

.source-items {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* ── Row — two variants share the same outer styling ───── */

.source-item {
  display: block;
  background: var(--navy-1);
  border: 1px solid var(--border);
  border-radius: 1px;
  color: inherit;
  text-decoration: none;
  transition: border-color 140ms ease, background 140ms ease;
}
.source-item:hover { border-color: var(--border-lt); background: var(--navy-2); }

/* Flat-anchor variant (no embedded content) */
a.source-item { padding: 12px 16px; }
a.source-item .source-item-pub,
a.source-item .source-item-title { display: block; }

/* Expandable variant (has video and/or reports) */
details.source-item { padding: 0; }
details.source-item > summary {
  list-style: none;                   /* hide native marker */
  cursor: pointer;
  padding: 12px 16px;
  display: grid;
  grid-template-columns: 1fr auto auto;
  column-gap: 14px;
  align-items: start;
}
details.source-item > summary::-webkit-details-marker { display: none; }
details.source-item > summary::marker { content: ''; }

/* Row head (both variants) */
.source-item-pub {
  font-family: var(--font-head, 'Barlow Condensed', sans-serif);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-1);
  margin-bottom: 4px;
}
.source-item-title {
  font-size: 12px;
  color: var(--text-2);
  line-height: 1.5;
}

/* Expandable layout: pub + title stack in col 1; ext + chev in cols 2-3 */
details.source-item > summary > .source-item-head-main {
  min-width: 0;                       /* allow title to wrap, not overflow */
}
details.source-item > summary > .source-item-ext {
  grid-column: 2;
  align-self: center;
  color: var(--text-3);
  font-size: 12px;
  padding: 4px 6px;
  border: 1px solid var(--border);
  border-radius: 1px;
  text-decoration: none;
  line-height: 1;
  transition: color 140ms ease, border-color 140ms ease;
}
details.source-item > summary > .source-item-ext:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}
details.source-item > summary > .source-item-chev {
  grid-column: 3;
  align-self: center;
  color: var(--text-3);
  font-size: 10px;
  transition: transform 180ms ease, color 180ms ease;
  padding: 0 4px;
}
details.source-item[open] > summary > .source-item-chev {
  transform: rotate(180deg);
  color: var(--cyan);
}

/* ── Expanded body ────────────────────────────────────────── */

.source-item-body {
  padding: 0 16px 16px;
  border-top: 1px solid var(--border);
  background: rgba(11, 18, 32, 0.55);
}

/* Video — 16:9 responsive iframe wrapper */
.source-video {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
  margin: 16px 0 0;
  border: 1px solid var(--border);
}
.source-video iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
.source-video-caption {
  font-size: 10px;
  color: var(--text-3);
  letter-spacing: 0.04em;
  margin-top: 6px;
}
.source-video-caption strong { color: var(--text-2); font-weight: 600; }

/* Reports — clean indented list */
.source-reports {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--border-dim);
  padding-top: 12px;
}
.source-reports-label {
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 8px;
}
.source-reports li {
  padding: 6px 0;
  border-top: 1px solid var(--border-dim);
}
.source-reports li:first-child { border-top: none; padding-top: 2px; }
.source-reports a {
  color: var(--text-2);
  text-decoration: none;
  font-size: 12px;
  line-height: 1.5;
  display: block;
}
.source-reports a:hover { color: var(--cyan); }
.source-reports a .report-meta {
  display: block;
  font-size: 10px;
  color: var(--text-3);
  letter-spacing: 0.04em;
  margin-top: 2px;
}

/* GR relevance note — one line per report explaining why GR cites it. */
.source-reports .report-gr-note {
  display: block;
  margin-top: 6px;
  padding: 6px 10px;
  font-size: 10.5px;
  line-height: 1.55;
  color: var(--text-2);
  background: rgba(74, 176, 204, 0.06);
  border-left: 2px solid var(--cyan-dim);
  font-style: normal;
}
.source-reports .report-gr-note strong {
  color: var(--cyan);
  font-weight: 600;
  letter-spacing: 0.08em;
  font-size: 9.5px;
  text-transform: uppercase;
  margin-right: 6px;
}

/* ── Responsive ──────────────────────────────────────────── */

@media (max-width: 700px) {
  details.source-item > summary {
    grid-template-columns: 1fr auto;
    row-gap: 8px;
  }
  details.source-item > summary > .source-item-ext { grid-column: 2; }
  details.source-item > summary > .source-item-chev {
    grid-column: 1 / -1;
    justify-self: end;
  }
}