/* BPC-157 Tendon Repair — hand-crafted teaching diagrams */

/* ── Shared diagram panel ─────────────────────────────────── */

.teach-diagram {
  max-width: none;
  margin: 1.75rem 0 2.25rem;
  padding: 1.15rem 1.15rem 1.25rem;
  background: var(--cool-grey);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.teach-diagram figcaption {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--navy);
  margin: 0 0 1rem;
  text-transform: none;
  letter-spacing: normal;
}

.article-prose .teach-diagram h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  text-transform: none;
  letter-spacing: normal;
  color: var(--navy);
  margin: 0 0 0.35rem;
  scroll-margin-top: 0;
}

.teach-diagram p,
.teach-diagram li {
  max-width: none;
}

.teach-diagram :focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.teach-diagram .figure-note {
  margin: 0.85rem 0 0;
  font-family: var(--font-ui);
  font-size: 0.92rem;
  font-style: italic;
  color: var(--ink-soft);
  max-width: none;
}

/* ── A. Angiogenesis flow — two lanes ─────────────────────── */

.bpc-flow {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.bpc-flow__source {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.75rem;
}

.bpc-flow__node {
  padding: 0.65rem 0.85rem;
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--font-ui);
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--navy);
  text-align: center;
}

.bpc-flow__lanes {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.bpc-flow__lane {
  flex: 1;
  min-width: 0;
  padding: 0.75rem 0.85rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.bpc-flow__lane--stalled {
  background: rgba(248, 250, 252, 0.85);
}

.bpc-flow__lane-heading {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.92rem;
  margin: 0 0 0.65rem;
  text-transform: none;
  letter-spacing: normal;
}

.bpc-flow__lane-heading--muted {
  color: var(--ink-soft);
  opacity: 0.7;
}

.bpc-flow__lane-heading--live {
  color: var(--gold);
}

.bpc-flow__steps {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
}

.bpc-flow__label {
  font-family: var(--font-ui);
  font-size: 0.92rem;
  font-style: italic;
  color: var(--ink-soft);
  text-align: center;
  margin: 0;
  padding: 0 0.25rem;
}

.bpc-flow__label--muted {
  opacity: 0.55;
}

.bpc-flow__outcome {
  font-family: var(--font-ui);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--navy);
  text-align: center;
  margin: 0;
}

.bpc-flow__outcome--muted {
  opacity: 0.55;
  color: var(--ink-soft);
  font-weight: 500;
}

.bpc-flow__outcome--live {
  color: var(--navy);
}

.bpc-flow__arrow {
  display: block;
  width: 1.35rem;
  height: 1.5rem;
  flex-shrink: 0;
}

.bpc-flow__arrow--down {
  height: 1.5rem;
}

@media (min-width: 560px) {
  .bpc-flow__lanes {
    flex-direction: row;
    gap: 1rem;
  }

  .bpc-flow__lane--stalled .bpc-flow__steps {
    flex-direction: row;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .bpc-flow__lane--stalled .bpc-flow__arrow:not(.bpc-flow__arrow--down) {
    width: 1.5rem;
    height: 1.35rem;
    transform: rotate(-90deg);
  }
}

/* ── B. Regeneration triangle ─────────────────────────────── */

.bpc-triangle-wrap {
  position: relative;
}

.bpc-triangle__lines {
  display: none;
}

.bpc-triangle {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.bpc-triangle__pillar {
  padding: 0.85rem 0.95rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  position: relative;
}

.bpc-triangle__pillar + .bpc-triangle__pillar::before {
  content: "";
  display: block;
  width: 2px;
  height: 0.75rem;
  margin: -0.75rem auto 0.5rem;
  background: var(--gold);
  border-radius: 1px;
}

.bpc-triangle__pillar h3 {
  font-size: 0.98rem;
  margin: 0 0 0.4rem;
  color: var(--navy);
}

.bpc-triangle__pillar p {
  margin: 0;
  font-family: var(--font-ui);
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--ink-soft);
}

@media (min-width: 560px) {
  .bpc-triangle-wrap {
    padding: 0.5rem 0 0;
  }

  .bpc-triangle__lines {
    display: block;
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
  }

  .bpc-triangle {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
    gap: 2.5rem 1rem;
    position: relative;
    z-index: 1;
  }

  .bpc-triangle__pillar + .bpc-triangle__pillar::before {
    display: none;
  }

  .bpc-triangle__pillar--top {
    grid-column: 1 / -1;
    justify-self: center;
    width: min(100%, 18rem);
  }

  .bpc-triangle__pillar--left {
    grid-column: 1;
    grid-row: 2;
  }

  .bpc-triangle__pillar--right {
    grid-column: 2;
    grid-row: 2;
  }
}

/* ── Reduced motion ───────────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  .teach-diagram,
  .teach-diagram * {
    animation: none !important;
    transition: none !important;
  }
}