.neuro-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 4rem;
  gap: 1rem;
}
.app-screens {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.85rem;
  margin-bottom: 0.65rem;
}
.app-screens img {
  width: 100%;
}
.neuro-diagram {
  margin: 1rem 0 1.45rem;
}
.neuro-diagram ol {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.65rem;
}
.neuro-diagram li {
  position: relative;
  border-top: 1px solid var(--line);
  padding-top: 0.5rem;
}
.neuro-diagram li:not(:last-child)::after {
  content: "→";
  position: absolute;
  right: -1.3rem;
  top: 0.45rem;
  color: var(--muted);
}
.neuro-diagram p {
  margin: 0;
}
.neuro-anatomy {
  display: grid;
  grid-template-columns: 10rem minmax(0, 1fr);
  align-items: start;
  gap: 1.3rem;
}
.neuro-anatomy img {
  width: 8.5rem;
  margin: auto;
}
.neuro-quiz label {
  display: block;
  margin: 0.35rem 0;
}
.neuro-quiz input {
  accent-color: var(--heading);
}
.neuro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.65rem;
}
.neuro-quiz button {
  padding: 0.2rem 0.55rem;
  color: var(--heading);
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--tint);
}
.neuro-quiz button:hover {
  background: var(--hover);
  border-color: var(--border-accent);
}
#quiz-feedback:not(:empty) {
  margin: 0.65rem 0;
}
.neuro-page pre {
  background: var(--tint);
  border-left: 1px solid var(--line);
  padding: 0.65rem;
  overflow: auto;
  font-size: 12px;
}
@media (max-width: 590px) {
  .app-screens {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .neuro-hero {
    grid-template-columns: minmax(0, 1fr) 2.6rem;
  }
  .neuro-diagram ol,
  .neuro-anatomy {
    grid-template-columns: 1fr;
    gap: 0.6rem;
  }
  .neuro-diagram li::after {
    display: none;
  }
  .neuro-anatomy figure {
    max-width: 13rem;
  }
}
/* Interactive reasoning exercise; data and scoring live in js/quiz/. */
.contribution-list {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 12px 20px;
}
.contribution-list dt {
  color: var(--heading);
}
.contribution-list dd {
  margin: 0;
}
.neuro-quiz {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 12px 0 20px;
}
.neuro-quiz fieldset {
  border: 0;
  padding: 0;
  margin: 18px 0;
  min-width: 0;
}
.neuro-quiz legend {
  color: var(--heading);
  font:
    18px/1.5 Arial,
    sans-serif;
  padding: 0;
}
.neuro-quiz progress {
  width: 100%;
  height: 6px;
  accent-color: var(--green);
}
#quiz-options label {
  display: flex;
  align-items: start;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  margin: 8px 0;
  cursor: pointer;
}
#quiz-options label:has(input:checked) {
  background: #eef4fa;
  border-color: var(--heading);
}
#quiz-options label:has(input:focus-visible) {
  outline: 2px solid var(--heading);
  outline-offset: 2px;
}
#quiz-options input {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin: 3px 0 0;
}
.neuro-quiz button,
.neuro-quiz select {
  min-height: 44px;
  padding: 8px 12px;
  border: 1px solid #888;
  border-radius: 0;
  font: inherit;
}
.neuro-quiz select {
  max-width: 100%;
  background: white;
  color: #222;
}
.neuro-quiz .confidence-label {
  margin-top: 20px;
}
#quiz-feedback:not(:empty) {
  border-left: 3px solid var(--green);
  background: #f4f6f2;
  padding: 8px 16px;
  margin: 20px 0;
}
#quiz-feedback p:first-child {
  color: #355a1b;
}
@media (max-width: 620px) {
  .contribution-list {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  .contribution-list dd {
    margin-bottom: 12px;
  }
}