/* The proof chain */

:where(.scene-chain) .chain-line .dot-in {
  fill: var(--primary);
}

:where(.scene-chain) .chain-line .dot-extra {
  fill: var(--accent-soft);
  stroke: var(--accent);
  stroke-width: 2.5;
}

:where(.scene-chain) .chain-line .dot-out {
  fill: var(--surface);
  stroke: var(--border-strong);
  stroke-width: 1.5;
}

:where(.scene-chain) .chain-line circle {
  transition:
    fill 250ms ease,
    stroke 250ms ease,
    r 250ms ease;
}

:where(.scene-chain) .chain-modes {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

:where(.scene-chain) .chain-ladder {
  display: grid;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

:where(.scene-chain) .chain-rung {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 560px);
  grid-template-rows: auto auto;
  column-gap: 20px;
  align-items: center;
  padding: 12px 16px;
  background: var(--surface-muted);
  border-radius: var(--radius);
}

:where(.scene-chain) .chain-head {
  display: flex;
  gap: 12px;
  grid-row: span 2;
}

:where(.scene-chain) .chain-head h4 {
  margin: 0;
  font-size: 1rem;
}

:where(.scene-chain) .chain-head p {
  margin: 2px 0 0;
  color: var(--text-muted);
  font-size: 0.86rem;
}

:where(.scene-chain) .chain-index {
  display: grid;
  flex: none;
  width: 26px;
  height: 26px;
  place-items: center;
  color: #ffffff;
  background: var(--primary);
  border-radius: 50%;
  font: 700 0.8rem var(--mono);
}

.scene-chain .chain-line {
  max-width: 560px;
  margin: 0;
}

:where(.scene-chain) .chain-set {
  justify-self: center;
  padding: 0;
  background: none;
  border: 0;
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 700;
  white-space: pre;
}

:where(.scene-chain) .chain-link {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 12px;
  padding: 6px 16px 6px 22px;
  color: var(--text-muted);
  font-size: 0.86rem;
}

:where(.scene-chain) .chain-rel {
  display: grid;
  width: 26px;
  height: 26px;
  place-items: center;
  margin-left: -9px;
  color: var(--accent);
  font-size: 1.3rem;
  font-weight: 700;
}

:where(.scene-chain) .chain-line .axis {
  stroke: var(--border-strong);
  stroke-width: 1.5;
}

:where(.scene-chain) .chain-band {
  fill: var(--primary-soft);
  stroke: var(--primary);
  stroke-width: 1.2;
}

.scene-chain .chain-band-label {
  fill: var(--primary);
  font: 700 11px var(--mono);
  text-anchor: middle;
}

.scene-chain .chain-tick {
  fill: var(--text-muted);
  font-size: 11px;
  text-anchor: middle;
}

:where(.scene-chain) .chain-legend {
  margin-top: 14px;
}

:where(.scene-chain) .chain-note {
  min-height: 3.2em;
  margin: 10px 0 0;
}

@media (max-width: 1100px) {
  :where(.scene-chain) .chain-rung {
    grid-template-columns: minmax(0, 1fr);
  }

  :where(.scene-chain) .chain-head {
    grid-row: auto;
  }
}

/* The step that spends the chain: from the last set to the verdict on screen. */
:where(.scene-chain) .chain-close {
  margin-top: 6px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}