/* section-folding.css, §5 Folding viewers and AA pair grid.
   Two square 3Dmol canvases side by side, optional loading overlay,
   pLDDT colour legend, mRNA flow strip, and the carbon/reference AA
   row pair with its shared mismatch legend. */

/* --- §5 Folding viewers --- */
/* Two square 3Dmol canvases side by side. On narrow screens (<720px) we
   stack them vertically so each viewer keeps a comfortable size. */
.fold-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
  margin-top: 12px;
}
.fold-viewer-col { display: flex; flex-direction: column; }
.fold-viewer-label {
  font-family: "JetBrains Mono", monospace;
  font-size: 9px; color: #888; text-transform: uppercase; letter-spacing: 1.5px;
  margin-bottom: 4px;
}
.fold-viewer {
  position: relative;
  width: 100%; aspect-ratio: 1 / 1;
  background: #fafaf7;
  border: 1px solid #eee;
  overflow: hidden;
}
.fold-viewer canvas { display: block; transition: opacity .15s ease-out; }
.fold-viewer .fold-empty {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-family: "JetBrains Mono", monospace; font-size: 10px;
  color: #bbb; letter-spacing: 1.5px; text-transform: uppercase;
  pointer-events: none;
}
/* Loading overlay shown over the cartoon while runFold() is in flight.
   The cached cartoon stays dimly visible underneath so the visitor can
   still compare to it once the fresh result lands. */
.fold-viewer .fold-overlay {
  position: absolute; inset: 0;
  display: none; align-items: center; justify-content: center; gap: 8px;
  background: rgba(250, 250, 247, 0.72);
  font-family: "JetBrains Mono", monospace; font-size: 10px;
  color: #555; letter-spacing: 1.5px; text-transform: uppercase;
  pointer-events: none;
}
.fold-viewer .fold-overlay .dot {
  display: inline-block; width: 6px; height: 6px; border-radius: 50%;
  background: #317f3f; animation: pulse 1.2s ease-in-out infinite;
}
.fold-viewer.running .fold-overlay { display: flex; }
.fold-viewer.running canvas { opacity: 0.28; }
/* Same overlay reused for genes whose precomputed fixture isn't ready
   yet (HF endpoint downtime, fresh symbol added to the list, etc.).
   Canvas fades almost fully so the empty WebGL frame doesn't read as
   a bug, the overlay carries the explanation instead. */
.fold-viewer.pending .fold-overlay { display: flex; }
.fold-viewer.pending canvas { opacity: 0.08; }
.fold-legend {
  font-family: "JetBrains Mono", monospace;
  font-size: 9px; color: #888; text-transform: uppercase; letter-spacing: 1.2px;
  display: flex; align-items: center; gap: 8px;
  margin-top: 10px;
}
/* pLDDT colour key: red = low confidence, beige = mid, blue = high.
   These three anchor colours are mirrored in plddtToColor() (JS) so
   the cartoon ribbons land in the same palette as this legend bar. */
.fold-legend-bar {
  width: 120px; height: 6px;
  background: linear-gradient(to right, #b00020 0%, #f0e8e0 50%, #2c5aa0 100%);
  border-radius: 1px;
}
/* Inline warning chip used when a gene is too long for the live fold
   pipeline (introns push the last exon past our generation budget). */
.fold-warn {
  color: #b00020;
  background: rgba(188, 46, 37, 0.10);
  padding: 1px 6px;
  border-radius: 2px;
}
/* Materialises the DNA → mRNA → protein arrow under the gene info,
   using the same monospace family/colour family as the rest of the
   metadata strip. The chevron is drawn with → to read as a flow,
   not a list. */
.mrna-info {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: #888;
  margin: 4px 0 16px;
  letter-spacing: 0.3px;
}
.mrna-info .arrow { color: #b8b8b6; padding: 0 6px; }
.mrna-info strong { color: #555; font-weight: 500; }
.mrna-info .mrna-trunc {
  color: #b00020;
  background: rgba(188, 46, 37, 0.08);
  padding: 0 4px;
  margin-left: 6px;
  border-radius: 2px;
}
/* Two-column AA grid: Carbon (left) / Reference (right), mirroring the
   fold-grid below so the eye lines up "carbon prediction → carbon
   fold" on one side and "reference truth → reference fold" on the
   other. Stacks on narrow screens to keep each line readable. */
.fold-aa-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
  margin-top: 4px;
}
.fold-aa-col { display: flex; flex-direction: column; min-width: 0; }
/* Soft-wrap as a safety net if the wrapped 40-char line ever still
   overflows (very narrow viewport, big font-size override, etc.).
   The JS still inserts \n every 40 chars so Carbon and Reference
   line up row-by-row in the common case. */
.fold-aa-col .seq-block { white-space: pre-wrap; word-break: break-all; overflow-x: visible; }
@media (max-width: 720px) {
  .fold-grid { grid-template-columns: 1fr; }
  .fold-aa-grid { grid-template-columns: 1fr; }
}

/* Shared highlight legend for the carbon/reference AA pair. The legend
   sat duplicated inside each row's seq-label, which crowded the labels
   to two lines at half-card width. Lifting it out (mirrors how
   .fold-legend works for the pLDDT viewers below) lets each row's label
   stay on a single line. */
.fold-aa-legend {
  font-family: "JetBrains Mono", monospace;
  font-size: 9px; color: #888; text-transform: uppercase; letter-spacing: 1.2px;
  display: flex; align-items: center; flex-wrap: wrap;
  gap: 4px 10px;
  margin-top: 10px;
}
.fold-aa-legend-swatch {
  display: inline-block;
  width: 10px; height: 10px;
  background: rgba(188, 46, 37, 0.18);
  border: 1px solid rgba(188, 46, 37, 0.35);
  border-radius: 1px;
}
.fold-aa-legend-sep { color: #c8c5b8; }