.page-axe-intestin-cerveau .site-header {
  position: fixed;
  inset: 0 0 auto 0;
  width: 100%;
  z-index: 40;
  background: rgba(252, 249, 244, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.page-axe-intestin-cerveau main {
  padding-top: 7.8rem;
  padding-bottom: 5rem;
}

.page-axe-intestin-cerveau .nav-row {
  min-height: 96px;
}

.page-axe-intestin-cerveau .container {
  width: min(1280px, calc(100vw - 56px));
}

.gut-brain-page {
  padding: 1.4rem 0 0;
}

.gut-brain-layout {
  display: grid;
  gap: 1.5rem;
}

.gut-brain-intro,
.gut-brain-explorer,
.gut-brain-note {
  border: 0;
}

.gut-brain-intro {
  display: grid;
  gap: 1rem;
  padding: clamp(1.6rem, 2vw, 2.2rem);
}

.gut-brain-intro h1 {
  margin: 0;
  color: var(--color-primary);
  font-size: clamp(2.4rem, 4.6vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -0.03em;
}

.gut-brain-intro p {
  margin: 0;
  max-width: 52rem;
  font-size: 1.05rem;
  line-height: 1.7;
}

.gut-brain-summary {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.gut-brain-summary article {
  display: grid;
  gap: 0.3rem;
  padding: 1rem 1.1rem;
  border-radius: 1.1rem;
  background: rgba(54, 96, 86, 0.06);
}

.gut-brain-summary strong {
  color: var(--color-primary);
  font-size: 0.98rem;
}

.gut-brain-summary span {
  color: var(--color-on-surface-variant);
  font-size: 0.94rem;
  line-height: 1.55;
}

.gut-brain-explorer {
  display: grid;
  grid-template-columns: minmax(240px, 280px) minmax(0, 1fr) minmax(280px, 340px);
  gap: 1.2rem;
  align-items: stretch;
  padding: clamp(1.2rem, 2vw, 1.8rem);
  background:
    radial-gradient(circle at top right, rgba(54, 96, 86, 0.12), transparent 32%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(248, 244, 239, 0.96));
  overflow: hidden;
}

.gut-brain-controls {
  display: grid;
  align-content: start;
  gap: 0.75rem;
}

.gut-brain-controls-label,
.gut-brain-card-kicker {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-on-surface-variant);
}

.gut-brain-control {
  width: 100%;
  border: 1px solid rgba(54, 96, 86, 0.12);
  border-radius: 1.2rem;
  padding: 1rem 1.05rem;
  background: rgba(255, 255, 255, 0.72);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.8rem;
  align-items: center;
  text-align: left;
  color: var(--color-on-surface);
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.gut-brain-control:hover,
.gut-brain-control:focus-visible,
.gut-brain-control.is-active {
  transform: translateY(-2px);
  border-color: rgba(54, 96, 86, 0.28);
  box-shadow: 0 16px 32px rgba(34, 47, 42, 0.08);
  background: rgba(236, 246, 241, 0.96);
}

.gut-brain-control:focus-visible {
  outline: 2px solid rgba(54, 96, 86, 0.35);
  outline-offset: 2px;
}

.gut-brain-control .material-symbols-outlined {
  display: grid;
  place-items: center;
  width: 2.7rem;
  height: 2.7rem;
  border-radius: 50%;
  background: rgba(54, 96, 86, 0.12);
  color: var(--color-primary);
}

.gut-brain-control strong,
.gut-brain-card h2,
.gut-brain-note h2 {
  color: var(--color-primary);
}

.gut-brain-control span {
  display: grid;
}

.gut-brain-control small {
  color: var(--color-on-surface-variant);
  font-size: 0.86rem;
  margin-top: 0.18rem;
}

.gut-brain-canvas {
  position: relative;
  min-height: 640px;
  display: grid;
  align-items: center;
  justify-items: center;
  padding: 0.5rem 0;
}

.gut-brain-node {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: grid;
  justify-items: center;
  gap: 0.75rem;
  z-index: 2;
}

.gut-brain-node--brain {
  top: 0;
}

.gut-brain-node--gut {
  bottom: 0;
}

.gut-brain-node img {
  width: min(220px, 100%);
  height: auto;
  filter: drop-shadow(0 24px 32px rgba(38, 45, 42, 0.14));
}

.gut-brain-node-badge {
  padding: 0.45rem 0.95rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(54, 96, 86, 0.12);
  color: var(--color-primary);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.gut-brain-connector {
  position: absolute;
  inset: 10px 0 120px;
  display: grid;
  place-items: center;
}

.gut-brain-connector svg {
  width: min(100%, 320px);
  height: 100%;
  overflow: visible;
}

.gut-brain-line {
  fill: none;
  stroke-width: 4;
  stroke-linecap: round;
  opacity: 0.18;
  transition: opacity 0.28s ease, filter 0.28s ease, stroke-width 0.28s ease;
}

.gut-brain-line.is-dimmed {
  opacity: 0.07;
}

.gut-brain-line.is-active {
  opacity: 0.92;
  stroke-width: 5;
  filter: drop-shadow(0 0 10px currentColor);
}

.gut-brain-line.is-visible {
  stroke-dasharray: 12 12;
  animation: gut-brain-flow 4.6s linear infinite;
}

.gut-brain-line--neural {
  color: #c59e2f;
  stroke: #c59e2f;
}

.gut-brain-line--hormonal {
  color: #8d6cb8;
  stroke: #8d6cb8;
}

.gut-brain-line--immune {
  color: #3e8d63;
  stroke: #3e8d63;
}

.gut-brain-line--microbiome {
  color: #1a8a85;
  stroke: #1a8a85;
}

.gut-brain-card {
  display: grid;
  align-content: start;
  gap: 0.9rem;
  padding: 1.3rem;
  border-radius: 1.3rem;
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid rgba(54, 96, 86, 0.12);
}

.gut-brain-card h2,
.gut-brain-note h2 {
  margin: 0;
}

.gut-brain-card p,
.gut-brain-note p {
  margin: 0;
  line-height: 1.7;
  color: var(--color-on-surface-variant);
}

.gut-brain-notes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem;
}

.gut-brain-note {
  padding: 1.4rem;
}

@keyframes gut-brain-flow {
  from {
    stroke-dashoffset: 120;
  }

  to {
    stroke-dashoffset: 0;
  }
}

@media (max-width: 1100px) {
  .gut-brain-explorer {
    grid-template-columns: 1fr;
  }

  .gut-brain-controls {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .gut-brain-controls-label {
    grid-column: 1 / -1;
  }

  .gut-brain-card {
    max-width: 48rem;
  }
}

@media (max-width: 900px) {
  .page-axe-intestin-cerveau .container {
    width: min(1280px, calc(100vw - 30px));
  }

  .page-axe-intestin-cerveau main {
    padding-top: 6.8rem;
  }

  .gut-brain-summary,
  .gut-brain-notes,
  .gut-brain-controls {
    grid-template-columns: 1fr;
  }

  .gut-brain-canvas {
    min-height: 560px;
  }

  .gut-brain-node img {
    width: min(180px, 72vw);
  }

  .gut-brain-connector {
    inset: 100px 0 110px;
  }
}

@media (max-width: 640px) {
  .gut-brain-page {
    padding-top: 0.6rem;
  }

  .gut-brain-intro h1 {
    font-size: clamp(2rem, 11vw, 2.8rem);
  }

  .gut-brain-intro,
  .gut-brain-explorer,
  .gut-brain-note {
    padding-inline: 1rem;
  }

  .gut-brain-canvas {
    min-height: 500px;
  }

  .gut-brain-node-badge {
    font-size: 0.74rem;
  }
}