/* Shared explanatory diagrams and real product-state screenshots. */
.concept-section {
  padding-top: 4rem;
  padding-bottom: 4rem;
}

.visual-model {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 120px minmax(0, 1.08fr) 120px minmax(0, 1fr);
  gap: 1rem;
  align-items: stretch;
  margin: 2rem 0 1.25rem;
}

.visual-stage {
  min-height: 230px;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: 0 8px 28px rgba(22, 52, 36, .06);
}

.visual-stage strong {
  display: block;
  font-size: 1.05rem;
  line-height: 1.35;
}

.visual-notebook {
  border-color: rgba(46, 133, 85, .45);
  box-shadow: var(--shadow);
}

.visual-kicker {
  margin-bottom: .35rem;
  color: var(--brand-dark);
  font-size: .74rem;
  font-weight: 800;
  letter-spacing: .065em;
  text-transform: uppercase;
}

.visual-connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .25rem;
  color: var(--muted);
  text-align: center;
  font-size: .72rem;
  font-weight: 700;
}

.visual-connector b {
  color: var(--brand);
  font-size: 2rem;
  line-height: 1;
}

.visual-summary {
  max-width: 900px;
  margin: 0 auto;
  color: var(--muted);
  text-align: center;
  font-size: 1rem;
}

.mode-comparison {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 48px minmax(0, 1fr);
  gap: 1rem;
  align-items: center;
  margin: 2rem 0 1.5rem;
}

.mode-comparison figure {
  margin: 0;
  min-width: 0;
}

.mode-comparison figcaption {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: .65rem;
}

.mode-comparison figcaption span {
  color: var(--brand-dark);
  font-size: .72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .06em;
}

.mode-comparison figcaption strong {
  font-size: 1rem;
}

.mode-comparison figure > p {
  margin: .75rem .15rem 0;
  color: var(--muted);
  font-size: .92rem;
  line-height: 1.55;
}

.mode-arrow {
  color: var(--brand);
  font-size: 2.25rem;
  text-align: center;
  font-weight: 800;
}

.product-state-shot {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: 0 12px 32px rgba(22, 52, 36, .10);
}

.visual-link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin: 1rem 0 1.5rem;
}

.compact-code {
  margin-top: 1rem;
}

.surface-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.6rem 0;
}

.surface-card {
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
}

.surface-card h3 {
  margin: .3rem 0 .8rem;
  font-size: 1.15rem;
}

.surface-card p {
  color: var(--muted);
  margin-bottom: 0;
}

.trust-note {
  margin-top: 1.25rem;
  padding: 1rem 1.1rem;
  border-left: 3px solid var(--brand);
  background: var(--brand-soft);
}

.doc-screenshot {
  margin: 1.25rem 0 1.7rem;
}

.doc-screenshot img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(22, 52, 36, .08);
}

.doc-screenshot figcaption {
  margin-top: .6rem;
  color: var(--muted);
  font-size: .86rem;
  line-height: 1.5;
}

.compact-screenshot {
  max-width: 640px;
}

.reactivity-strip,
.mini-mode-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .55rem;
  flex-wrap: wrap;
  margin: 1.25rem 0 1.5rem;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #f8faf9;
}

.reactivity-strip span {
  padding: .5rem .65rem;
  border-radius: 7px;
  background: white;
  border: 1px solid var(--border);
  font-size: .76rem;
  font-weight: 700;
}

.reactivity-strip b {
  color: var(--brand);
}

.mini-mode-flow span {
  display: flex;
  flex-direction: column;
  gap: .2rem;
  min-width: 160px;
  padding: .7rem .8rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: white;
}

.mini-mode-flow small {
  color: var(--muted);
}

.mini-mode-flow > b {
  color: var(--brand-dark);
  font-size: .76rem;
  text-align: center;
}

.docs-mode-comparison {
  grid-template-columns: 1fr;
  gap: .7rem;
}

.docs-mode-comparison .mode-arrow {
  font-size: 1.7rem;
  line-height: 1;
}

@media (max-width: 1000px) {
  .visual-model {
    grid-template-columns: 1fr;
  }

  .visual-connector {
    flex-direction: row;
    padding: .25rem 0;
  }

  .visual-connector b {
    transform: rotate(90deg);
  }
}

@media (max-width: 760px) {
  .mode-comparison,
  .surface-compare {
    grid-template-columns: 1fr;
  }

  .mode-arrow {
    transform: rotate(90deg);
  }

  .docs-mode-comparison .mode-arrow {
    transform: none;
  }

}

.quarto-dark .visual-stage,
.quarto-dark .surface-card {
  background: #222a26;
}

.quarto-dark .reactivity-strip,
.quarto-dark .mini-mode-flow {
  background: #1d2420;
}

.quarto-dark .reactivity-strip span,
.quarto-dark .mini-mode-flow span {
  background: #252e29;
}

.formula-screenshot-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  align-items: start;
  margin: 1.35rem 0 1.7rem;
}

.formula-screenshot-grid .doc-screenshot {
  margin: 0;
}

@media (max-width: 760px) {
  .formula-screenshot-grid {
    grid-template-columns: 1fr;
  }
}

/* Real-product evidence introduced for the homepage visual system. */
.visual-stage {
  min-height: 165px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.visual-stage p {
  margin: .65rem 0 0;
  color: var(--muted);
  font-size: .88rem;
  line-height: 1.5;
}

.workflow-column {
  min-width: 0;
}

.workflow-evidence {
  display: grid;
  gap: .9rem;
  margin: 0 0 1rem;
}

.workflow-evidence figure,
.formula-evidence figure,
.surface-figure {
  margin: 0;
  min-width: 0;
}

.workflow-evidence figcaption,
.surface-figure figcaption {
  margin: 0 0 .55rem;
  color: var(--muted);
  font-size: .78rem;
  line-height: 1.45;
}

.workflow-evidence figcaption span {
  display: block;
  margin-bottom: .12rem;
  color: var(--brand-dark);
  font-size: .67rem;
  font-weight: 800;
  letter-spacing: .055em;
  text-transform: uppercase;
}

.workflow-evidence figcaption strong {
  display: block;
  color: var(--body-color, inherit);
  font-size: .9rem;
}

.workflow-evidence img,
.surface-shot {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--surface);
}

.workflow-primary img {
  box-shadow: 0 10px 26px rgba(22, 52, 36, .08);
}

.formula-evidence {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .8rem;
}

.surface-figure {
  margin: .8rem 0 1rem;
}

.surface-figure figcaption {
  margin: .55rem .05rem 0;
}

.surface-shot {
  aspect-ratio: 2.595 / 1;
  object-fit: cover;
  box-shadow: 0 8px 20px rgba(22, 52, 36, .07);
}

@media (max-width: 560px) {
  .formula-evidence {
    grid-template-columns: 1fr;
  }
}