.acoustic-panels-hub {
  --color-accent: #0891B2;
  --color-accent-hover: #0E7490;
  --color-accent-soft: #E0F2FE;
  --color-accent-subtle: #BAE6FD;
}

.acoustic-panels-hub .mission--hub .mission__inner {
  width: min(100%, 76rem);
  max-width: min(100%, 76rem);
}

.acoustic-panels-hub .mission--hub .mission__statement {
  font-size: clamp(2.25rem, 3.2vw, 3.5rem);
  line-height: 1.08;
  max-width: min(100%, 72rem);
}

.acoustic-panels-hub .mission--hub .mission__body {
  max-width: min(100%, 68rem);
}

/* ═══════════════════════════════════════════════════════════════════════════
   HERO MOTIF — room cross-section featuring acoustic panels
   ─────────────────────────────────────────────────────────────────────────
   Mirrors the wide narrative SVG approach from the parent Acoustic
   Treatment hero (same room outline, glow, and wave language) but
   features the panels themselves as the dominant visual element. Each
   panel rect is rendered twice: a base gradient face plus a stripe
   pattern overlay that reads as panel fabric. Faint enough to remain a
   backdrop, distinctive enough to pre-tell the panel story.
   ═══════════════════════════════════════════════════════════════════════════ */

.acoustic-panels-hub .mission--hub .mission__backdrop {
  inset: -8% -10%;
  z-index: 0;
  opacity: 1;
}

.acoustic-panels-hub .mission--hub .mission__backdrop .panels-hero-visual {
  width: min(132vw, 76rem);
  height: min(72vw, 28rem);
  min-height: 20rem;
  color: color-mix(in srgb, var(--color-accent) 70%, var(--color-surface));
  opacity: 0.46;
}

.acoustic-panels-hub .panels-hero-visual__room,
.acoustic-panels-hub .panels-hero-visual__floor,
.acoustic-panels-hub .panels-hero-visual__wave,
.acoustic-panels-hub .panels-hero-visual__reflection {
  fill: none;
  stroke: currentColor;
  vector-effect: non-scaling-stroke;
}

.acoustic-panels-hub .panels-hero-visual__room {
  stroke-width: 1.2;
  opacity: 0.42;
}

.acoustic-panels-hub .panels-hero-visual__floor {
  stroke-width: 1;
  opacity: 0.24;
}

.acoustic-panels-hub .panels-hero-visual__panel {
  fill: url("#panels-hero-panel-fill");
  stroke: currentColor;
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
  opacity: 0.74;
}

.acoustic-panels-hub .panels-hero-visual__panel--left {
  opacity: 0.62;
}

.acoustic-panels-hub .panels-hero-visual__panel--ceiling {
  opacity: 0.86;
}

.acoustic-panels-hub .panels-hero-visual__panel-weave {
  fill: url("#panels-hero-weave");
  stroke: none;
  opacity: 0.5;
}

.acoustic-panels-hub .panels-hero-visual__wave {
  stroke-linecap: round;
  stroke-linejoin: round;
}

.acoustic-panels-hub .panels-hero-visual__wave--messy {
  stroke-width: 1.1;
  stroke-dasharray: 2 10;
  opacity: 0.26;
}

.acoustic-panels-hub .panels-hero-visual__wave--calm {
  stroke-width: 1.6;
  opacity: 0.56;
}

.acoustic-panels-hub .panels-hero-visual__reflection {
  stroke-width: 1;
  stroke-linecap: round;
  stroke-dasharray: 6 10;
  opacity: 0.34;
}

@media (max-width: 699px) {
  .acoustic-panels-hub .mission--hub .mission__backdrop {
    inset: -2% -56%;
  }

  .acoustic-panels-hub .mission--hub .mission__backdrop .panels-hero-visual {
    width: 160vw;
    min-height: 22rem;
    opacity: 0.34;
  }
}

.panels-hero-ctas {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.panels-hero-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  transition: background 180ms ease, border-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.panels-hero-cta--primary {
  min-height: 44px;
  padding: 0 var(--space-5);
  border: 1px solid var(--color-accent);
  border-radius: 999px;
  background: var(--color-accent);
  color: var(--color-surface);
  font-family: var(--font-sans);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
}

.panels-hero-cta--secondary {
  color: color-mix(in srgb, var(--color-accent) 72%, white);
  font-family: var(--font-serif);
  font-size: var(--fs-sm);
  font-style: italic;
  border-bottom: 1px solid color-mix(in srgb, var(--color-accent) 34%, transparent);
}

.panels-hero-cta__icon {
  flex: 0 0 auto;
}

.panels-hero-cta:hover,
.panels-hero-cta:focus-visible {
  transform: translateY(-1px);
}

.panels-hero-cta--primary:hover,
.panels-hero-cta--primary:focus-visible {
  border-color: var(--color-accent-subtle);
  background: var(--color-accent-hover);
}

.panels-hero-cta--secondary:hover,
.panels-hero-cta--secondary:focus-visible {
  color: var(--color-surface);
  border-bottom-color: var(--color-accent);
}

.acoustic-panels-hub .page-section__header,
.acoustic-panels-hub .chapter__header {
  max-width: min(100%, 64rem);
}

.acoustic-panels-hub .page-section__title,
.acoustic-panels-hub .chapter-heading__text {
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-snug);
}

.acoustic-panels-hub .page-section__lede,
.acoustic-panels-hub .chapter-lede {
  max-width: min(100%, 56rem);
  margin-top: var(--space-4);
  font-family: var(--font-serif);
  font-size: var(--fs-md);
  line-height: var(--lh-relaxed);
}

.acoustic-panels-hub .treatment-shell > #next-topics {
  min-width: 0;
}

.acoustic-panels-hub .treatment-shell > #next-topics > .container {
  max-width: none;
  padding-inline: 0;
}

.acoustic-panels-hub .chapter-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-2) var(--space-3);
  align-items: start;
}

.acoustic-panels-hub .chapter-heading__num {
  grid-column: 1;
  grid-row: 1;
}

.acoustic-panels-hub .chapter-heading__text {
  grid-column: 1 / -1;
  grid-row: 2;
  font-size: var(--fs-3xl);
}

.acoustic-panels-hub .chapter-heading__copy-link {
  grid-column: 2;
  grid-row: 1;
  align-self: start;
}

.acoustic-panels-hub .stage-entry__gist,
.acoustic-panels-hub .spec-card__body,
.acoustic-panels-hub .quantity-read__gist,
.acoustic-panels-hub .planner-cta__body,
.acoustic-panels-hub .planner-cta__features li,
.acoustic-panels-hub .panels-room-link__fit,
.acoustic-panels-hub .pick-row__hook,
.acoustic-panels-hub .panel-silo__signal,
.acoustic-panels-hub .panel-silo-route__fit,
.acoustic-panels-hub .install-row__goal,
.acoustic-panels-hub .verify-item__test,
.acoustic-panels-hub .verify-item__pass-criterion,
.acoustic-panels-hub .myth-row__truth,
.acoustic-panels-hub .room-card__hook {
  font-family: var(--font-serif);
  line-height: var(--lh-relaxed);
}

.acoustic-panels-hub .stage-columns,
.acoustic-panels-hub .quantity-stack {
  gap: clamp(var(--space-6), 5vw, var(--space-12));
}

.acoustic-panels-hub .placement-stack {
  display: block;
}

.acoustic-panels-hub .planner-cta {
  gap: var(--space-3);
  padding: var(--space-5);
  background: var(--color-surface);
  color: var(--color-ink);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  box-shadow: none;
}

.acoustic-panels-hub .planner-cta::before {
  content: none;
}

.acoustic-panels-hub .planner-cta__eyebrow {
  color: var(--color-accent-hover);
}

.acoustic-panels-hub .planner-cta__title {
  font-size: var(--fs-xl);
  color: var(--color-ink);
}

.acoustic-panels-hub .planner-cta__body,
.acoustic-panels-hub .planner-cta__features li {
  color: var(--color-ink-muted);
}

.acoustic-panels-hub .planner-cta__features {
  margin: var(--space-2) 0;
}

.acoustic-panels-hub .planner-cta__launch {
  margin-top: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: var(--fs-sm);
}

.acoustic-panels-hub .placement-visual {
  display: grid;
  gap: var(--space-5);
}

.acoustic-panels-hub .room-map__stage {
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  box-shadow: none;
  scroll-margin-top: calc(var(--site-header-h, 80px) + var(--space-20));
}

.acoustic-panels-hub .room-map__svg {
  display: block;
  width: 100%;
  height: auto;
  color: var(--color-ink-muted);
}

.acoustic-panels-hub .room-map__caption {
  margin-top: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-ink-subtle);
  text-align: center;
}

.acoustic-panels-hub .room__ceiling {
  fill: var(--color-bg);
  stroke: var(--color-line);
}

.acoustic-panels-hub .room__side-wall {
  fill: var(--color-surface-2);
  stroke: var(--color-line);
}

.acoustic-panels-hub .room__front-wall {
  fill: var(--color-surface);
  stroke: var(--color-line);
  stroke-width: 1.5;
}

.acoustic-panels-hub .room__floor {
  fill: var(--color-line);
  stroke: var(--color-line);
  opacity: 0.5;
}

.acoustic-panels-hub .room__sofa {
  fill: var(--color-surface-2);
  stroke: var(--color-line);
  stroke-width: 1.25;
}

.acoustic-panels-hub .room__sofa-seam {
  stroke: var(--color-line);
  opacity: 0.45;
}

.acoustic-panels-hub .room__person-body,
.acoustic-panels-hub .room__person-head {
  fill: var(--color-ink);
  opacity: 0.88;
}

.acoustic-panels-hub .room-marker__shape {
  fill: color-mix(in srgb, var(--color-accent) 14%, transparent);
  stroke: var(--color-accent);
  stroke-width: 1.5;
  transition: fill 0.2s ease, stroke-width 0.2s ease;
}

.acoustic-panels-hub .room-marker__core {
  fill: var(--color-accent);
}

.acoustic-panels-hub .room-marker__number {
  fill: var(--color-surface);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: var(--fw-semibold);
  text-anchor: middle;
  dominant-baseline: central;
  pointer-events: none;
}

.acoustic-panels-hub .placement-visual[data-active="1"] .room-marker[data-zone="1"] .room-marker__shape,
.acoustic-panels-hub .placement-visual[data-active="2"] .room-marker[data-zone="2"] .room-marker__shape,
.acoustic-panels-hub .placement-visual[data-active="3"] .room-marker[data-zone="3"] .room-marker__shape,
.acoustic-panels-hub .placement-visual[data-active="4"] .room-marker[data-zone="4"] .room-marker__shape,
.acoustic-panels-hub .room-marker:hover .room-marker__shape,
.acoustic-panels-hub .room-marker:focus-visible .room-marker__shape {
  fill: var(--color-accent);
  stroke-width: 2.5;
}

.acoustic-panels-hub .placement-visual[data-active="1"] .room-marker[data-zone="1"] .room-marker__core,
.acoustic-panels-hub .placement-visual[data-active="2"] .room-marker[data-zone="2"] .room-marker__core,
.acoustic-panels-hub .placement-visual[data-active="3"] .room-marker[data-zone="3"] .room-marker__core,
.acoustic-panels-hub .placement-visual[data-active="4"] .room-marker[data-zone="4"] .room-marker__core,
.acoustic-panels-hub .room-marker:hover .room-marker__core,
.acoustic-panels-hub .room-marker:focus-visible .room-marker__core {
  fill: var(--color-accent-hover);
}

.acoustic-panels-hub .placement-visual[data-blink="1"] .room-marker[data-zone="1"] .room-marker__shape,
.acoustic-panels-hub .placement-visual[data-blink="2"] .room-marker[data-zone="2"] .room-marker__shape,
.acoustic-panels-hub .placement-visual[data-blink="3"] .room-marker[data-zone="3"] .room-marker__shape,
.acoustic-panels-hub .placement-visual[data-blink="4"] .room-marker[data-zone="4"] .room-marker__shape {
  animation: placement-marker-blink 0.8s ease-in-out 4;
}

@keyframes placement-marker-blink {
  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.45;
  }
}

.acoustic-panels-hub .placement-visual__routes {
  display: grid;
  gap: var(--space-3);
}

.acoustic-panels-hub .placement-route {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr);
  gap: var(--space-3);
  align-items: start;
  padding: var(--space-3);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  color: inherit;
  text-decoration: none;
  scroll-margin-top: calc(var(--site-header-h, 80px) + var(--space-20));
  transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

@media (min-width: 1100px) {
  .acoustic-panels-hub .room-map__stage,
  .acoustic-panels-hub .placement-route {
    scroll-margin-top: calc(var(--site-header-h, 80px) + var(--space-6));
  }
}

.acoustic-panels-hub .placement-route:hover,
.acoustic-panels-hub .placement-route:focus-visible,
.acoustic-panels-hub .placement-route:target,
.acoustic-panels-hub .placement-visual[data-active="1"] .placement-route[data-zone="1"],
.acoustic-panels-hub .placement-visual[data-active="2"] .placement-route[data-zone="2"],
.acoustic-panels-hub .placement-visual[data-active="3"] .placement-route[data-zone="3"],
.acoustic-panels-hub .placement-visual[data-active="4"] .placement-route[data-zone="4"] {
  background-color: color-mix(in srgb, var(--color-accent) 7%, transparent);
  border-color: color-mix(in srgb, var(--color-accent) 34%, var(--color-line));
  box-shadow: inset 3px 0 0 var(--color-accent);
}

.acoustic-panels-hub .placement-route__num {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  color: var(--color-accent);
  letter-spacing: 0.08em;
}

.acoustic-panels-hub .placement-route__body {
  display: grid;
  gap: var(--space-1);
}

.acoustic-panels-hub .placement-route__title {
  font-size: var(--fs-base);
  font-weight: var(--fw-bold);
  line-height: var(--lh-snug);
  color: var(--color-ink);
}

.acoustic-panels-hub .placement-route__hint {
  font-family: var(--font-serif);
  font-size: var(--fs-sm);
  line-height: var(--lh-normal);
  color: var(--color-ink-muted);
}

.acoustic-panels-hub .placement-room-fallback {
  display: grid;
  gap: var(--space-1);
  padding-top: var(--space-5);
  scroll-margin-top: calc(var(--site-header-h, 80px) + var(--space-20));
}

.acoustic-panels-hub .placement-room-fallback__intro {
  display: grid;
  gap: var(--space-2);
  max-width: 44rem;
}

.acoustic-panels-hub .placement-room-fallback__intro p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: var(--fs-md);
  line-height: var(--lh-relaxed);
  color: var(--color-ink-muted);
}

.acoustic-panels-hub .placement-room-fallback__eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent-hover);
}

@media (min-width: 1100px) {
  .acoustic-panels-hub .placement-room-fallback {
    scroll-margin-top: calc(var(--site-header-h, 80px) + var(--space-6));
  }
}

@media (min-width: 560px) {
  .acoustic-panels-hub .placement-visual__routes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3);
  }
}

@media (max-width: 559px) {
  .acoustic-panels-hub .room-map__stage {
    padding: var(--space-3);
  }

  .acoustic-panels-hub .placement-route__hint {
    display: none;
  }
}

.acoustic-panels-hub .spec-grid {
  counter-reset: panel-spec;
  display: block;
  gap: 0;
  margin-top: clamp(var(--space-6), 4vw, var(--space-8));
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.acoustic-panels-hub .spec-ledger__intro {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  align-items: baseline;
  padding-block: var(--space-4);
  border-bottom: 1px solid var(--color-line);
}

.acoustic-panels-hub .spec-ledger__count {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.acoustic-panels-hub .spec-ledger__summary {
  margin: 0;
  font-family: var(--font-serif);
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  color: var(--color-ink-muted);
}

.acoustic-panels-hub .spec-card {
  counter-increment: panel-spec;
  display: grid;
  grid-template-columns: minmax(2.6rem, auto) max-content minmax(18rem, 1fr) max-content;
  gap: var(--space-2) var(--space-4);
  align-items: center;
  padding-block: var(--space-4);
  border-bottom: 1px solid var(--color-line);
  color: inherit;
  text-decoration: none;
  transition: background-color 0.2s ease;
}

.acoustic-panels-hub .spec-card::before {
  content: counter(panel-spec, decimal-leading-zero);
  grid-column: 1;
  grid-row: 1;
  align-self: center;
  min-width: 2.5ch;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  line-height: 1.35;
  letter-spacing: 0.08em;
  color: var(--color-ink-subtle);
}

.acoustic-panels-hub .spec-card__tag {
  grid-column: 2;
  grid-row: 1;
  color: var(--color-ink-muted);
}

.acoustic-panels-hub .spec-card__spec {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(var(--fs-lg), 2vw, var(--fs-xl));
  font-weight: var(--fw-semibold);
  letter-spacing: var(--tracking-snug);
  white-space: nowrap;
}

.acoustic-panels-hub .spec-card__body {
  grid-column: 3;
  grid-row: 1;
  max-width: 48ch;
  margin: 0;
  font-size: var(--fs-base);
}

.acoustic-panels-hub .spec-card__cta {
  grid-column: 4;
  grid-row: 1;
  justify-self: end;
  margin-top: 0;
  color: var(--color-accent-hover);
}

.acoustic-panels-hub .spec-card:last-child {
  border-bottom: 0;
}

.acoustic-panels-hub .spec-card:hover,
.acoustic-panels-hub .spec-card:focus-visible {
  background-color: var(--color-surface, #f7f7f7);
}

.acoustic-panels-hub .spec-card:hover::before,
.acoustic-panels-hub .spec-card:focus-visible::before {
  color: var(--color-accent);
}

.acoustic-panels-hub .spec-card:hover .spec-card__spec,
.acoustic-panels-hub .spec-card:focus-visible .spec-card__spec {
  color: var(--color-accent-hover);
}

.panels-room-router {
  display: grid;
  gap: clamp(var(--space-6), 5vw, var(--space-10));
  margin-top: var(--space-8);
}

.panels-room-router__visual {
  border-top: 1px solid var(--color-line);
  padding-top: var(--space-6);
}

.panels-room-router__diagram {
  display: block;
  width: min(100%, 44rem);
  height: auto;
  margin-bottom: var(--space-4);
  color: var(--color-accent-hover);
}

.panels-diagnose-map {
  margin: 0 0 var(--space-6);
  padding: var(--space-5) var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md, 8px);
  color: var(--color-accent-hover);
}

.panels-diagnose-map__svg {
  display: block;
  width: 100%;
  max-width: 72rem;
  height: auto;
  margin: 0 auto;
}

/* ── Diagnose-map animations ──────────────────────────────────────── */

@keyframes diagnose-emit-burst {
  0%   { opacity: 0.06; transform: scale(0.78); }
  35%  { opacity: var(--emit-peak, 0.55); transform: scale(1.06); }
  100% { opacity: 0.06; transform: scale(0.78); }
}

@keyframes diagnose-reflect-bounce {
  0%, 100% { opacity: 0.08; transform: scale(1, 1); }
  25%      { opacity: 0.12; transform: scale(1, 1); }
  55%      { opacity: 0.42; transform: scale(0.96, 0.96); }
  75%      { opacity: 0.28; transform: scale(1.02, 1.02); }
}

@keyframes diagnose-scatter-drift {
  0%       { opacity: 0.1;  transform: translate(0, 0); }
  20%      { opacity: 0.36; transform: translate(2px, -1px); }
  45%      { opacity: 0.18; transform: translate(-2px, 1px); }
  70%      { opacity: 0.38; transform: translate(1px, 2px); }
  100%     { opacity: 0.1;  transform: translate(0, 0); }
}

@keyframes diagnose-wave-shift {
  0%, 100% { transform: translateX(0); opacity: 0.65; }
  50%      { transform: translateX(5px); opacity: 0.8; }
}

@keyframes diagnose-wave-travel {
  0%   { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: -60; }
}

.diagnose-map__emit {
  transform-origin: 185px 113px;
}

.diagnose-map__emit--inner {
  --emit-peak: 0.6;
  animation: diagnose-emit-burst 2s ease-in-out infinite;
}

.diagnose-map__emit--mid {
  --emit-peak: 0.5;
  animation: diagnose-emit-burst 2s ease-in-out 0.5s infinite;
}

.diagnose-map__emit--outer {
  --emit-peak: 0.42;
  animation: diagnose-emit-burst 2s ease-in-out 1s infinite;
}

.diagnose-map__reflect {
  transform-origin: 185px 113px;
  animation: diagnose-reflect-bounce 2.6s ease-in-out 1.4s infinite;
}

.diagnose-map__scatter {
  animation: diagnose-scatter-drift 3.2s ease-in-out infinite;
}

.diagnose-map__wave--solid path {
  animation: diagnose-wave-shift 2.2s ease-in-out infinite;
}

.diagnose-map__wave--faint path {
  stroke-dasharray: 4 6;
  animation: diagnose-wave-travel 2.4s linear infinite;
}

@media (prefers-reduced-motion: reduce) {
  .diagnose-map__emit,
  .diagnose-map__reflect,
  .diagnose-map__scatter,
  .diagnose-map__wave--solid path,
  .diagnose-map__wave--faint path {
    animation: none;
  }
  .diagnose-map__wave--faint path {
    stroke-dasharray: none;
  }
}

.panel-solve-check {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  width: 100vw;
  max-width: none;
  margin-inline: calc(50% - 50vw);
  align-items: start;
}

.panel-solve-check__list {
  display: grid;
  width: 100%;
}

.panel-solve-check__item {
  --panel-solve-accent: var(--color-ink-muted);
  --panel-solve-soft: color-mix(in srgb, var(--panel-solve-accent) 8%, var(--color-surface));
  --panel-solve-scene-width: clamp(6.75rem, 11vw, 8.5rem);
  display: grid;
  grid-template-columns: var(--panel-solve-scene-width) minmax(0, 1fr) auto;
  gap: clamp(var(--space-4), 3vw, var(--space-8));
  align-items: center;
  padding: var(--space-5) max(var(--space-5), calc((100vw - 72rem) / 2));
  color: inherit;
  text-decoration: none;
}

.panel-solve-check__item.panel-solve-check__item--static {
  grid-template-columns: var(--panel-solve-scene-width) minmax(0, 1fr);
}

.panel-solve-check__item--yes {
  --panel-solve-accent: var(--color-accent-hover);
  --panel-solve-soft: color-mix(in srgb, var(--color-accent) 10%, var(--color-surface));
}

.panel-solve-check__item--transfer {
  --panel-solve-accent: var(--color-ink-muted);
  --panel-solve-soft: color-mix(in srgb, var(--color-ink-muted) 10%, var(--color-surface));
}

.panel-solve-check__item--bass {
  --panel-solve-accent: color-mix(in srgb, var(--color-warning) 70%, var(--color-ink));
  --panel-solve-soft: color-mix(in srgb, var(--color-warning) 14%, var(--color-surface));
}

.panel-solve-check__scene {
  display: block;
  width: 100%;
  height: auto;
  color: var(--panel-solve-accent);
  overflow: visible;
  justify-self: center;
}

.panel-solve-check__badge {
  display: inline-flex;
  align-items: center;
  width: max-content;
  padding: 0.1rem calc(var(--space-2) * 0.75);
  font-size: calc(var(--fs-lg) * 0.55);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  line-height: 1.25;
  color: var(--panel-solve-accent);
  background: color-mix(in srgb, var(--panel-solve-accent) 14%, var(--color-surface));
  border-radius: var(--radius-full);
}

.panel-solve-check__scene-room {
  fill: var(--panel-solve-soft);
  stroke: currentColor;
  stroke-width: 1.2;
  opacity: 0.74;
}

.panel-solve-check__scene-source {
  fill: currentColor;
  opacity: 0.72;
  transform-box: fill-box;
  transform-origin: center;
  animation: panel-scene-source 2.8s ease-in-out infinite;
}

.panel-solve-check__scene-head {
  fill: currentColor;
  opacity: 0.42;
}

.panel-solve-check__scene-mic,
.panel-solve-check__scene-speaker,
.panel-solve-check__scene-sub {
  fill: var(--panel-solve-soft);
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.78;
}

.panel-solve-check__scene-mic-stand,
.panel-solve-check__scene-speaker-cone,
.panel-solve-check__scene-sub-cone {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.4;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.62;
}

.panel-solve-check__scene-ray,
.panel-solve-check__scene-ring,
.panel-solve-check__scene-wave,
.panel-solve-check__scene-wall,
.panel-solve-check__scene-transfer-wave,
.panel-solve-check__scene-transfer-faint,
.panel-solve-check__scene-bass-wave {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.panel-solve-check__scene-wall {
  stroke-width: 2.2;
  opacity: 0.62;
}

.panel-solve-check__scene-ray {
  stroke-width: 1.8;
  stroke-dasharray: 8 9;
  opacity: 0.62;
  animation: panel-scene-flow 2.5s linear infinite;
}

.panel-solve-check__scene-ray--b {
  animation-delay: -0.7s;
}

.panel-solve-check__scene-ray--c {
  animation-delay: -1.3s;
}

.panel-solve-check__scene-ring {
  stroke-width: 1.6;
  opacity: 0;
  transform-box: fill-box;
  transform-origin: center;
  animation: panel-scene-ring 3s ease-out infinite;
}

.panel-solve-check__scene-ring--b {
  animation-delay: 0.45s;
}

.panel-solve-check__scene-ring--c {
  animation-delay: 0.9s;
}

.panel-solve-check__scene-wave {
  stroke-width: 1.9;
  stroke-dasharray: 18 10;
  opacity: 0.58;
  animation: panel-scene-flow 3.2s linear infinite;
}

.panel-solve-check__scene-wave--b {
  animation-delay: -0.9s;
}

.panel-solve-check__scene-wave--c {
  animation-delay: -1.8s;
}

.panel-solve-check__scene-transfer-wave {
  stroke-width: 2;
  opacity: 0.68;
  transform-box: fill-box;
  transform-origin: center;
  animation: panel-scene-transfer 2.8s ease-in-out infinite;
}

.panel-solve-check__scene-transfer-wave--b {
  animation-delay: -1.1s;
}

.panel-solve-check__scene-transfer-faint {
  stroke-width: 2;
  stroke-dasharray: 3 7;
  opacity: 0.28;
  animation: panel-scene-flow 2.8s linear infinite;
}

.panel-solve-check__scene-bass-wave {
  stroke-width: 2.1;
  opacity: 0.48;
  transform-box: fill-box;
  transform-origin: center;
  animation: panel-scene-bass 3.2s ease-in-out infinite;
}

.panel-solve-check__scene-bass-wave--b {
  animation-delay: -1.6s;
}

.panel-solve-check__scene-burst {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  opacity: 0.6;
  transform-box: fill-box;
  transform-origin: center;
  animation: panel-scene-burst 2.4s ease-in-out infinite;
}

.panel-solve-check__scene-corner-blob {
  fill: currentColor;
  opacity: 0;
  transform-box: fill-box;
  transform-origin: center;
  animation: panel-scene-corner 3s ease-in-out infinite;
}

.panel-solve-check__scene-corner-blob--b {
  animation-delay: -1.5s;
}

@keyframes panel-scene-source {
  0%,
  100% {
    opacity: 0.58;
    transform: scale(1);
  }

  45% {
    opacity: 0.92;
    transform: scale(1.16);
  }
}

@keyframes panel-scene-flow {
  to {
    stroke-dashoffset: -34;
  }
}

@keyframes panel-scene-ring {
  0% {
    opacity: 0;
    transform: scale(0.74);
  }

  34% {
    opacity: 0.58;
  }

  100% {
    opacity: 0;
    transform: scale(1.18);
  }
}

@keyframes panel-scene-transfer {
  0%,
  100% {
    opacity: 0.42;
    transform: translateX(0);
  }

  50% {
    opacity: 0.78;
    transform: translateX(5px);
  }
}

@keyframes panel-scene-bass {
  0%,
  100% {
    opacity: 0.34;
    transform: scaleY(0.9);
  }

  50% {
    opacity: 0.68;
    transform: scaleY(1.08);
  }
}

@keyframes panel-scene-burst {
  0%,
  100% {
    opacity: 0.32;
    transform: scale(0.78);
  }

  45% {
    opacity: 0.92;
    transform: scale(1.16);
  }
}

@keyframes panel-scene-corner {
  0%,
  100% {
    opacity: 0;
    transform: scale(0.7);
  }

  50% {
    opacity: 0.5;
    transform: scale(1.08);
  }
}

@media (prefers-reduced-motion: reduce) {
  .panel-solve-check__scene-source,
  .panel-solve-check__scene-ray,
  .panel-solve-check__scene-ring,
  .panel-solve-check__scene-wave,
  .panel-solve-check__scene-transfer-wave,
  .panel-solve-check__scene-transfer-faint,
  .panel-solve-check__scene-bass-wave,
  .panel-solve-check__scene-burst,
  .panel-solve-check__scene-corner-blob {
    animation: none;
  }
}

.panel-solve-check__body {
  display: grid;
  gap: var(--space-2);
}

.panel-solve-check__title {
  font-family: var(--font-sans);
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-snug);
  color: var(--color-ink);
}

.panel-solve-check__text {
  font-family: var(--font-serif);
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  color: var(--color-ink-muted);
}

.panel-solve-check__text-link {
  color: var(--panel-solve-accent);
  font-weight: var(--fw-semibold);
  text-decoration: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

.panel-solve-check__text-link:hover,
.panel-solve-check__text-link:focus-visible {
  color: var(--color-accent-hover);
}

.panel-solve-check__arrow {
  color: var(--color-accent-hover);
  font-family: var(--font-mono);
  font-weight: var(--fw-bold);
  line-height: var(--lh-snug);
}

a.panel-solve-check__item:hover .panel-solve-check__title,
a.panel-solve-check__item:focus-visible .panel-solve-check__title {
  color: var(--color-accent-hover);
}

/* ── Chapter 1 diagnose grid — full-width SVG with editorial steps below ──
   The SVG owns the visual diagnosis. The ordered list below reads as a short
   editorial checklist, not article inventory cards. */
.diagnose-grid {
  display: grid;
  gap: var(--space-5);
  margin-bottom: var(--space-5);
}

.diagnose-grid__entries {
  display: grid;
  width: 100%;
  max-width: 72rem;
  margin-inline: auto;
  gap: 0;
  grid-template-columns: 1fr;
}

.diagnose-steps {
  padding: 0;
  list-style: none;
  counter-reset: diagnose-step;
}

.diagnose-step {
  counter-increment: diagnose-step;
  position: relative;
  display: grid;
  grid-template-columns: 3.5rem minmax(0, 1fr);
  gap: var(--space-5);
  padding: var(--space-6) 0;
}

.diagnose-step::before {
  content: "";
  position: absolute;
  left: 1.75rem;
  top: calc(var(--space-6) + 3.5rem);
  bottom: 0;
  width: 1px;
  background: var(--color-line);
}

.diagnose-step:last-child::before {
  content: none;
}

.diagnose-step::after {
  content: "";
  position: absolute;
  left: 1.75rem;
  top: 0;
  width: 1px;
  height: var(--space-6);
  background: var(--color-line);
}

.diagnose-step:first-child::after {
  content: none;
}

.diagnose-step__marker {
  display: grid;
  place-items: start center;
}

.diagnose-step__num {
  display: grid;
  place-items: center;
  width: 3.5rem;
  height: 3.5rem;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
  line-height: 1;
  color: var(--color-accent);
  background: var(--color-surface);
  border: 1px solid var(--color-accent-subtle);
  border-radius: 999px;
}

.diagnose-step__body {
  display: grid;
  gap: var(--space-3);
  align-content: start;
  max-width: 62rem;
}

.diagnose-step__title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(var(--fs-xl), 2vw, var(--fs-2xl));
  line-height: var(--lh-snug);
  letter-spacing: normal;
  color: var(--color-ink);
}

.diagnose-step__text,
.diagnose-step__verdict {
  margin: 0;
}

.diagnose-step__text {
  font-family: var(--font-serif);
  font-size: var(--fs-md);
  line-height: var(--lh-relaxed);
  color: var(--color-ink-muted);
}

.diagnose-step__text a {
  color: var(--color-accent-hover);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.diagnose-step__text a:hover {
  color: var(--color-ink);
}

.diagnose-step__verdict {
  font-size: var(--fs-sm);
  line-height: var(--lh-normal);
  color: var(--color-accent-hover);
}

.diagnose-step__verdict span {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink);
}

.diagnose-step__verdict a {
  color: var(--color-accent-hover);
  text-decoration: none;
}

.diagnose-step__verdict a:hover {
  text-decoration: underline;
}

.diagnose-sidenote {
  display: grid;
  gap: var(--space-3);
  max-width: 72rem;
  margin: 0 auto var(--space-6);
  padding: clamp(var(--space-4), 2.5vw, var(--space-5)) clamp(var(--space-5), 3vw, var(--space-6));
  border: 1px solid var(--color-line);
  border-left: 2px solid #B45309;
  border-radius: 12px;
  background: #FEF3C7;
  color: var(--color-ink);
  box-shadow: none;
}

.diagnose-sidenote__label {
  margin: 0;
  color: #B45309;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.diagnose-sidenote__icon {
  display: inline-block;
  margin-left: 0.15em;
  font-size: 1.15em;
  letter-spacing: 0;
  text-transform: none;
  vertical-align: -0.05em;
}

.diagnose-sidenote__value {
  max-width: 62ch;
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: clamp(var(--fs-lg), 1.6vw, var(--fs-xl));
  font-weight: var(--fw-semibold);
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.diagnose-sidenote__meta {
  max-width: 72ch;
  margin: 0;
  color: var(--color-ink-muted);
  font-size: var(--fs-sm);
  line-height: 1.6;
}

.diagnose-sidenote__meta a {
  color: var(--color-accent-hover);
  text-decoration: none;
}

.diagnose-sidenote__meta a:hover {
  text-decoration: underline;
}

/* Animated placement diagram: 4s loop, sequenced like the MIDI signal-flow */
.panels-room-router__diagram .panels-anim-driver {
  transform-box: fill-box;
  transform-origin: center;
  animation: panels-room-emit 4s ease-in-out infinite;
}

.panels-room-router__diagram .panels-anim-side {
  animation: panels-room-absorb 4s ease-in-out infinite;
}

.panels-room-router__diagram .panels-anim-listener-body {
  animation: panels-room-receive 4s ease-in-out infinite;
}

.panels-room-router__diagram .panels-anim-blip {
  opacity: 0;
  animation: panels-room-blip 4s ease-in-out infinite;
}

@keyframes panels-room-emit {
  0%, 100% { opacity: 0.7; transform: scale(1); }
  6%       { opacity: 1;   transform: scale(1.6); }
  14%      { opacity: 0.7; transform: scale(1); }
}

@keyframes panels-room-absorb {
  0%, 100%  { opacity: 0.5; }
  30%, 40%  { opacity: 0.95; }
}

@keyframes panels-room-receive {
  0%, 100% { fill-opacity: 0.18; }
  52%, 64% { fill-opacity: 0.45; }
}

@keyframes panels-room-blip {
  0%, 12%, 58%, 100% { opacity: 0; }
  18%, 50%           { opacity: 0.95; }
}

@media (prefers-reduced-motion: reduce) {
  .panels-room-router__diagram .panels-anim-driver,
  .panels-room-router__diagram .panels-anim-side,
  .panels-room-router__diagram .panels-anim-listener-body,
  .panels-room-router__diagram .panels-anim-blip {
    animation: none;
  }
  .panels-room-router__diagram .panels-anim-blip {
    display: none;
  }
}

.panels-room-router__caption {
  max-width: 32ch;
  margin: 0;
  font-family: var(--font-serif);
  font-size: var(--fs-md);
  line-height: var(--lh-relaxed);
  color: var(--color-ink-muted);
}

.panels-room-router__routes {
  display: grid;
  gap: var(--space-3);
  align-items: start;
}

.panels-room-group {
  display: grid;
  gap: var(--space-2);
  align-content: start;
  padding: var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
}

.panels-room-group__label {
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-line);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  line-height: var(--lh-snug);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent-hover);
}

.panels-room-link {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-1) var(--space-4);
  align-items: start;
  min-height: 100%;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-line);
  color: inherit;
  text-decoration: none;
}

.panels-room-link:last-child {
  border-bottom: 0;
}

.panels-room-link__room {
  grid-column: 1;
  font-size: var(--fs-base);
  font-weight: var(--fw-bold);
  line-height: var(--lh-snug);
  color: var(--color-ink);
  letter-spacing: var(--tracking-snug);
  transition: color var(--duration-base) var(--ease-out);
}

.panels-room-link__fit {
  grid-column: 1;
  font-size: var(--fs-sm);
  line-height: var(--lh-normal);
  color: var(--color-ink-muted);
}

.panels-room-link__arrow {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: center;
  color: var(--color-ink-subtle);
  transition: color var(--duration-base) var(--ease-out), transform var(--duration-base) var(--ease-out);
}

.panels-room-link:hover .panels-room-link__room,
.panels-room-link:focus-visible .panels-room-link__room,
.panels-room-link:hover .panels-room-link__arrow,
.panels-room-link:focus-visible .panels-room-link__arrow {
  color: var(--color-accent);
}

.panels-room-link:hover .panels-room-link__arrow,
.panels-room-link:focus-visible .panels-room-link__arrow {
  transform: translateX(4px);
}

.acoustic-panels-hub .panel-silo-chart {
  display: grid;
  border-top: 1px solid var(--color-line);
}

.acoustic-panels-hub .panel-silo-chart__labels {
  display: none;
}

.acoustic-panels-hub .panel-silo {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-5) 0;
  border-bottom: 1px solid var(--color-line);
}

.acoustic-panels-hub .panel-silo:last-child {
  border-bottom: 0;
}

.acoustic-panels-hub .panel-silo__title {
  margin: 0;
  font-size: clamp(var(--fs-lg), 1.6vw, var(--fs-xl));
  font-weight: var(--fw-semibold);
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-snug);
  color: var(--color-ink);
}

.acoustic-panels-hub .panel-silo__signal {
  max-width: 42ch;
  margin: 0;
  font-size: var(--fs-sm);
  color: var(--color-ink-muted);
}

.acoustic-panels-hub .panel-silo__routes {
  display: grid;
  gap: 0;
}

.acoustic-panels-hub .panel-silo-route {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: var(--space-2) var(--space-3);
  align-items: start;
  padding: var(--space-3) 0;
  color: inherit;
  text-decoration: none;
  transition: padding-left var(--duration-base) var(--ease-out);
}

.acoustic-panels-hub .panel-silo-route + .panel-silo-route {
  border-top: 1px solid var(--color-line);
}

.acoustic-panels-hub .panel-silo-route:hover,
.acoustic-panels-hub .panel-silo-route:focus-visible {
  padding-left: var(--space-3);
}

.acoustic-panels-hub .panel-silo-route__num {
  padding-top: 0.1em;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  line-height: var(--lh-snug);
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.acoustic-panels-hub .panel-silo-route__body {
  display: grid;
  gap: var(--space-2);
  min-width: 0;
}

.acoustic-panels-hub .panel-silo-route__room {
  font-size: var(--fs-base);
  font-weight: var(--fw-bold);
  line-height: var(--lh-snug);
  color: var(--color-ink);
  transition: color var(--duration-base) var(--ease-out);
}

.acoustic-panels-hub .panel-silo-route__title {
  margin-top: 0.1em;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  line-height: var(--lh-snug);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent-hover);
}

.acoustic-panels-hub .panel-silo-route__fit {
  max-width: 58ch;
  margin-top: 0.1em;
  font-size: var(--fs-sm);
  color: var(--color-ink-muted);
}

.acoustic-panels-hub .panel-silo-route__arrow {
  padding-top: 0.15em;
  color: var(--color-ink-subtle);
  transition: color var(--duration-base) var(--ease-out), transform var(--duration-base) var(--ease-out);
}

.acoustic-panels-hub .panel-silo-route:hover .panel-silo-route__room,
.acoustic-panels-hub .panel-silo-route:focus-visible .panel-silo-route__room,
.acoustic-panels-hub .panel-silo-route:hover .panel-silo-route__arrow,
.acoustic-panels-hub .panel-silo-route:focus-visible .panel-silo-route__arrow {
  color: var(--color-accent);
}

.acoustic-panels-hub .panel-silo-route:hover .panel-silo-route__arrow,
.acoustic-panels-hub .panel-silo-route:focus-visible .panel-silo-route__arrow {
  transform: translateX(4px);
}

@media (min-width: 760px) {
  .acoustic-panels-hub .panel-silo-chart__labels,
  .acoustic-panels-hub .panel-silo {
    display: grid;
    grid-template-columns: minmax(8rem, 0.72fr) minmax(12rem, 1fr) minmax(0, 1.55fr);
    gap: clamp(var(--space-5), 4vw, var(--space-8));
    align-items: start;
  }

  .acoustic-panels-hub .panel-silo-chart__labels {
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-line);
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    font-weight: var(--fw-bold);
    line-height: var(--lh-snug);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-accent-hover);
  }

  .acoustic-panels-hub .panel-silo {
    padding: var(--space-5) 0;
  }

  .acoustic-panels-hub .panel-silo__title,
  .acoustic-panels-hub .panel-silo__signal,
  .acoustic-panels-hub .panel-silo__routes {
    min-width: 0;
  }

  .acoustic-panels-hub .panel-silo-route:first-child {
    padding-top: 0;
  }
}

@media (min-width: 560px) {
  .acoustic-panels-hub .install-grid,
  .acoustic-panels-hub .library__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .acoustic-panels-hub .install-grid,
  .acoustic-panels-hub .library__list {
    column-gap: var(--space-6);
  }

  .panels-room-router__routes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3);
  }

  .acoustic-panels-hub .pick-row {
    grid-template-columns: 96px auto minmax(0, 1fr) auto;
    grid-template-rows: auto auto;
    gap: var(--space-3) var(--space-4);
    align-items: center;
  }

  .acoustic-panels-hub .pick-row__thumb-wrap {
    grid-column: 1;
    grid-row: 1 / span 2;
    width: 96px;
    aspect-ratio: 4 / 3;
    margin-bottom: 0;
  }

  .acoustic-panels-hub .pick-row__num {
    grid-column: 2;
    grid-row: 1;
  }

  .acoustic-panels-hub .pick-row__label {
    grid-column: 3;
    grid-row: 1;
    justify-self: start;
  }

  .acoustic-panels-hub .pick-row__main {
    grid-column: 2 / span 2;
    grid-row: 2;
  }

  .acoustic-panels-hub .pick-row__cta {
    grid-column: 4;
    grid-row: 1 / span 2;
    justify-self: end;
  }
}

@media (min-width: 700px) {
  .acoustic-panels-hub .stage-columns {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(260px, 0.9fr);
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .acoustic-panels-hub .quantity-stack {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(260px, 0.9fr);
    align-items: start;
  }

  .acoustic-panels-hub .quantity-stack__calc {
    order: initial;
    margin-top: 0;
    margin-bottom: 0;
  }
}

@media (min-width: 760px) {
  .acoustic-panels-hub .page-section__header,
  .acoustic-panels-hub .chapter__header {
    max-width: min(100%, 72rem);
  }

  .acoustic-panels-hub .page-section__lede,
  .acoustic-panels-hub .chapter-lede {
    max-width: min(100%, 64rem);
  }
}

@media (min-width: 900px) {
  .panels-room-router {
    grid-template-columns: minmax(220px, 300px) minmax(0, 1fr);
    align-items: start;
  }

  .panels-room-router__visual {
    position: sticky;
    top: calc(var(--site-header-h, 0px) + var(--space-6));
  }
}

@media (min-width: 1100px) {
  .acoustic-panels-hub .treatment-shell > #next-topics {
    grid-column: 2;
  }

  .acoustic-panels-hub .page-section__header,
  .acoustic-panels-hub .chapter__header {
    max-width: min(100%, 78rem);
  }

  .acoustic-panels-hub .page-section__lede,
  .acoustic-panels-hub .chapter-lede {
    max-width: min(100%, 68rem);
  }

  .panel-solve-check {
    width: 100%;
    max-width: 72rem;
    margin-inline: 0;
  }

  .panel-solve-check__item {
    padding-inline: 0;
  }

  .acoustic-panels-hub .library__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

}

@media (max-width: 899px) {
  .acoustic-panels-hub .mission--hub .mission__statement {
    max-width: min(100%, 58rem);
    font-size: clamp(1.9rem, 4vw, 2.35rem);
    line-height: 1.1;
  }

  .panel-solve-check {
    grid-template-columns: minmax(0, 1fr);
  }

  .acoustic-panels-hub .chapter-heading__text {
    font-size: clamp(var(--fs-2xl), 4vw, var(--fs-3xl));
  }

  .acoustic-panels-hub .spec-card {
    grid-template-columns: minmax(2.2rem, auto) minmax(10rem, 0.48fr) minmax(12rem, 1fr) max-content;
    gap: var(--space-1) var(--space-3);
    padding-block: var(--space-3);
  }

  .acoustic-panels-hub .spec-card__spec {
    font-size: var(--fs-lg);
    white-space: normal;
  }

  .acoustic-panels-hub .spec-card__body {
    font-size: var(--fs-sm);
    line-height: var(--lh-snug);
  }

  .acoustic-panels-hub .spec-card__cta {
    font-size: var(--fs-xs);
  }
}

@media (max-width: 640px) {
  .acoustic-panels-hub .mission--hub .mission__statement {
    max-width: 100%;
    font-size: clamp(1.65rem, 6.2vw, 2rem);
    line-height: 1.12;
  }

  .acoustic-panels-hub .mission--hub .mission__body {
    max-width: 100%;
  }

  .acoustic-panels-hub .page-section__lede,
  .acoustic-panels-hub .chapter-lede {
    font-size: var(--fs-base);
  }

  .panel-solve-check__item {
    --panel-solve-scene-width: clamp(4.75rem, 18vw, 6rem);
    grid-template-columns: var(--panel-solve-scene-width) minmax(0, 1fr) auto;
    gap: var(--space-3) var(--space-4);
  }

  .acoustic-panels-hub .spec-ledger__intro {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-1);
  }

  .acoustic-panels-hub .spec-card {
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: start;
    gap: 0 var(--space-3);
    padding-block: var(--space-3);
  }

  .acoustic-panels-hub .spec-card::before {
    grid-row: 1;
    align-self: start;
  }

  .acoustic-panels-hub .spec-card::after {
    content: "→";
    grid-column: 3;
    grid-row: 1;
    align-self: center;
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    color: var(--color-accent-hover);
  }

  .acoustic-panels-hub .spec-card__tag,
  .acoustic-panels-hub .spec-card__spec,
  .acoustic-panels-hub .spec-card__body,
  .acoustic-panels-hub .spec-card__cta {
    grid-column: 2;
  }

  .acoustic-panels-hub .spec-card__spec {
    grid-row: 1;
  }

  .acoustic-panels-hub .spec-card__body,
  .acoustic-panels-hub .spec-card__cta {
    display: none;
  }

  .acoustic-panels-hub .spec-card__cta {
    justify-self: start;
    margin-top: var(--space-1);
  }
}

@media (max-width: 559px) {
  .acoustic-panels-hub .mission--hub .mission__statement {
    max-width: 100%;
  }

  .panels-room-router__visual {
    padding-top: var(--space-5);
  }

  .panels-room-router__caption {
    font-size: var(--fs-base);
  }
}

.acoustic-panels-hub .treatment-content {
  gap: clamp(var(--space-12), 8vw, var(--space-16));
}

.acoustic-panels-hub .chapter {
  padding-block-start: clamp(var(--space-8), 6vw, var(--space-12));
  border-top: 1px solid var(--color-line);
}

.acoustic-panels-hub .chapter:first-child {
  padding-block-start: 0;
  border-top: 0;
}

/* Last visual row of install-grid: remove bottom border so it doesn't
   double with the next chapter's border-top. */
.acoustic-panels-hub .install-grid .install-row:last-child {
  border-bottom: 0;
}

@media (min-width: 1100px) {
  .acoustic-panels-hub .install-grid .install-row:nth-last-child(-n+3) {
    border-bottom: 0;
  }
}

.acoustic-panels-hub .stage-columns,
.acoustic-panels-hub .placement-stack,
.panels-room-router {
  display: block;
}

.acoustic-panels-hub .stage-columns__aside,
.acoustic-panels-hub .placement-stack__planner,
.panels-room-router__routes {
  margin-top: clamp(var(--space-6), 5vw, var(--space-10));
}

@media (max-width: 1099px) {
  .acoustic-panels-hub .quantity-stack {
    display: flex;
    flex-direction: column;
  }

  .acoustic-panels-hub .quantity-stack__calc {
    order: -1;
    margin-top: var(--space-4);
    margin-bottom: 0;
  }
}

.acoustic-panels-hub .planner-cta,
.acoustic-panels-hub .quantity-calc-frame {
  max-width: 44rem;
}

.acoustic-panels-hub .quantity-calc-frame .calc-btn {
  width: auto;
  min-width: 12rem;
  padding: var(--space-3) var(--space-5);
  justify-self: start;
  font-weight: var(--fw-bold);
}

.acoustic-panels-hub .quantity-calc-frame .calc-label,
.acoustic-panels-hub .quantity-calc-frame .dim-label,
.acoustic-panels-hub .quantity-calc-frame .select-label,
.acoustic-panels-hub .quantity-calc-frame input,
.acoustic-panels-hub .quantity-calc-frame select,
.acoustic-panels-hub .quantity-calc-frame button {
  font-size: var(--fs-sm);
  font-weight: var(--fw-regular);
}

.acoustic-panels-hub .quantity-stack__reads {
  display: grid;
  gap: var(--space-4);
}

@media (min-width: 560px) and (max-width: 1099px) {
  .acoustic-panels-hub .quantity-stack__reads {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: stretch;
  }

  .acoustic-panels-hub .quantity-read {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-content: start;
    align-items: start;
    border-top: 0;
    border-left: 3px solid var(--color-accent);
    padding: var(--space-5) 0 var(--space-5) var(--space-5);
    min-height: 100%;
  }

  .acoustic-panels-hub .quantity-read:hover,
  .acoustic-panels-hub .quantity-read:focus-visible,
  .acoustic-panels-hub .quantity-read--primary:hover,
  .acoustic-panels-hub .quantity-read--primary:focus-visible {
    padding-left: var(--space-5);
  }

  .acoustic-panels-hub .quantity-read__num {
    color: var(--color-accent);
  }
}

.acoustic-panels-hub .install-grid,
.acoustic-panels-hub .room-grid {
  grid-template-columns: minmax(0, 1fr);
}

.acoustic-panels-hub .spec-grid,
.acoustic-panels-hub .install-grid,
.acoustic-panels-hub .room-grid,
.panels-room-router__routes {
  max-width: 62rem;
}

.acoustic-panels-hub .panels-room-router__visual {
  max-width: 62rem;
  position: static;
}

.acoustic-panels-hub .panels-room-router__caption {
  max-width: 54ch;
}

.acoustic-panels-hub .room-grid {
  row-gap: 0;
  border-top: 1px solid var(--color-line);
}

.acoustic-panels-hub .room-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-1) var(--space-4);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-line);
}

.acoustic-panels-hub .room-card:first-child {
  border-top: 0;
}

.acoustic-panels-hub .room-card__frame {
  display: none;
}

.acoustic-panels-hub .room-card__room,
.acoustic-panels-hub .room-card__hook,
.acoustic-panels-hub .room-card__cta {
  grid-column: 1;
}

.acoustic-panels-hub .room-card__cta {
  align-self: center;
  grid-column: 2;
  grid-row: 1 / span 3;
}

.acoustic-panels-hub .verify-split {
  display: block;
}

/* ── Animated verify stepper ──────────────────────────────────────────────
   Auto-cycles through 4 post-install test steps on a 12s loop (3s each).
   Pure CSS — no JS required. Each slide fades in, holds, fades out. */
.verify-stepper {
  --stepper-duration: 12s;
  position: relative;
  padding: clamp(var(--space-5), 4vw, var(--space-8));
  border: 1px solid var(--color-line);
  border-radius: 12px;
  background: var(--color-surface);
  overflow: hidden;
}

.verify-stepper__title {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 var(--space-5);
}

.verify-stepper__visual {
  margin-bottom: var(--space-5);
  border: 1px solid color-mix(in srgb, var(--color-line) 72%, transparent);
  border-radius: 10px;
  background: #fbfaf6;
  overflow: hidden;
}

.verify-stepper__visual img {
  display: block;
  width: 100%;
  height: auto;
}

/* SVG scene carousel — synced with stepper slides */
.verify-stepper__visual {
  position: relative;
  aspect-ratio: 2 / 1;
}

.verify-stepper__scene {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  animation: stepper-slide var(--stepper-duration) infinite;
}

.verify-stepper__scene img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.verify-stepper__scene[data-step="1"] { animation-delay: 0s; }
.verify-stepper__scene[data-step="2"] { animation-delay: 3s; }
.verify-stepper__scene[data-step="3"] { animation-delay: 6s; }
.verify-stepper__scene[data-step="4"] { animation-delay: 9s; }

/* Sound wave pulse animation */
.vs-wave {
  animation: vs-wave-pulse 1.6s ease-out infinite;
}
.vs-wave--1 { animation-delay: 0s; }
.vs-wave--2 { animation-delay: 0.3s; }
.vs-wave--3 { animation-delay: 0.1s; }
.vs-wave--4 { animation-delay: 0.4s; }

@keyframes vs-wave-pulse {
  0%   { opacity: 0.4; transform: scale(0.92); }
  50%  { opacity: 0.2; transform: scale(1); }
  100% { opacity: 0; transform: scale(1.06); }
}

@media (prefers-reduced-motion: reduce) {
  .verify-stepper__scene {
    position: static;
    opacity: 1;
    animation: none;
    display: none;
  }
  .verify-stepper__scene[data-step="1"] {
    display: block;
  }
  .vs-wave {
    animation: none;
    opacity: 0.25;
  }
}

.verify-stepper__track {
  display: grid;
  gap: var(--space-5);
}

/* Progress pips */
.verify-stepper__progress {
  display: flex;
  gap: var(--space-2);
}

.verify-stepper__pip {
  flex: 1;
  height: 3px;
  border-radius: 2px;
  background: var(--color-line);
  position: relative;
  overflow: hidden;
}

.verify-stepper__pip::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--color-accent);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  animation: stepper-pip-fill var(--stepper-duration) infinite;
}

.verify-stepper__pip[data-step="1"]::after { animation-delay: 0s; }
.verify-stepper__pip[data-step="2"]::after { animation-delay: 3s; }
.verify-stepper__pip[data-step="3"]::after { animation-delay: 6s; }
.verify-stepper__pip[data-step="4"]::after { animation-delay: 9s; }

@keyframes stepper-pip-fill {
  0%      { transform: scaleX(0); }
  2%      { transform: scaleX(0); }
  23%     { transform: scaleX(1); }
  25%     { transform: scaleX(1); }
  25.01%  { transform: scaleX(0); }
  100%    { transform: scaleX(0); }
}

/* Slides container — stacked absolutely */
.verify-stepper__slides {
  position: relative;
  min-height: 140px;
}

.verify-stepper__slide {
  position: absolute;
  inset: 0;
  display: grid;
  gap: var(--space-2);
  align-content: start;
  opacity: 0;
  animation: stepper-slide var(--stepper-duration) infinite;
}

.verify-stepper__slide[data-step="1"] { animation-delay: 0s; }
.verify-stepper__slide[data-step="2"] { animation-delay: 3s; }
.verify-stepper__slide[data-step="3"] { animation-delay: 6s; }
.verify-stepper__slide[data-step="4"] { animation-delay: 9s; }

@keyframes stepper-slide {
  0%      { opacity: 0; transform: translateY(8px); }
  3%      { opacity: 1; transform: translateY(0); }
  23%     { opacity: 1; transform: translateY(0); }
  25%     { opacity: 0; transform: translateY(-4px); }
  100%    { opacity: 0; }
}

.verify-stepper__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 5vw, 40px);
  font-weight: var(--fw-bold);
  line-height: 1;
  color: var(--color-accent);
  opacity: 0.25;
}

.verify-stepper__name {
  font-family: var(--font-sans);
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  line-height: var(--lh-snug);
  color: var(--color-ink);
  margin: 0;
}

.verify-stepper__instruction {
  font-family: var(--font-serif);
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  color: var(--color-ink-muted);
  margin: 0;
}

.verify-stepper__pass {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  color: #059669;
  padding: var(--space-1) var(--space-3);
  background: color-mix(in srgb, #059669 8%, transparent);
  border-radius: 999px;
  width: fit-content;
}

.verify-stepper__pass::before {
  content: "✓";
  font-weight: var(--fw-bold);
}

/* Reduced motion: show all steps stacked statically */
@media (prefers-reduced-motion: reduce) {
  .verify-stepper__slides {
    position: static;
    min-height: auto;
  }
  .verify-stepper__slide {
    position: static;
    opacity: 1;
    animation: none;
    padding-block: var(--space-4);
    border-top: 1px solid var(--color-line);
  }
  .verify-stepper__slide:first-child {
    border-top: 0;
    padding-block-start: 0;
  }
  .verify-stepper__pip::after {
    animation: none;
    transform: scaleX(1);
  }
}

.acoustic-panels-hub .panels-myths {
  --myth-claim-color: #b42318;
  margin-top: clamp(var(--space-8), 6vw, var(--space-12));
  display: flex;
  flex-direction: column;
  gap: 0;
}

.acoustic-panels-hub .myth-row {
  display: grid;
  grid-template-columns: minmax(0, 5fr) auto minmax(0, 7fr);
  column-gap: var(--space-8);
  align-items: stretch;
  padding: var(--space-8) 0;
  border-top: 1px solid var(--color-line);
}

.acoustic-panels-hub .myth-row:first-child {
  border-top: 2px solid var(--color-ink);
}

.acoustic-panels-hub .myth-row:last-child {
  border-bottom: 1px solid var(--color-line);
}

.acoustic-panels-hub .myth-row__myth {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  align-items: flex-start;
}

.acoustic-panels-hub .myth-row__tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.acoustic-panels-hub .myth-row__tag--myth {
  color: color-mix(in srgb, var(--myth-claim-color) 68%, var(--color-ink-muted));
}

.acoustic-panels-hub .myth-row__tag--reality {
  color: var(--color-accent);
}

.acoustic-panels-hub .myth-row__tag-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: var(--fw-bold);
  line-height: 1;
}

.acoustic-panels-hub .myth-row__tag--myth .myth-row__tag-icon {
  color: currentColor;
  background: transparent;
  border: 1px solid color-mix(in srgb, var(--myth-claim-color) 38%, var(--color-line));
}

.acoustic-panels-hub .myth-row__tag--reality .myth-row__tag-icon {
  background: var(--color-accent);
  color: var(--color-surface);
}

.acoustic-panels-hub .myth-row__claim {
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  line-height: 1.25;
  letter-spacing: var(--tracking-snug);
  text-decoration-line: line-through;
  text-decoration-color: color-mix(in srgb, var(--myth-claim-color) 30%, var(--color-line-strong));
  text-decoration-thickness: 1px;
}

.acoustic-panels-hub .myth-row__divider {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-ink-subtle);
  font-family: var(--font-mono);
  font-size: var(--fs-xl);
}

.acoustic-panels-hub .myth-row__reality {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.acoustic-panels-hub .myth-row__truth {
  margin: 0;
  color: var(--color-ink);
  font-size: var(--fs-base);
}

.acoustic-panels-hub .myth-row__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.acoustic-panels-hub .myth-row__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  text-decoration: none;
  background: transparent;
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-pill);
  transition: border-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out);
}

.acoustic-panels-hub .myth-row__link:hover,
.acoustic-panels-hub .myth-row__link:focus-visible {
  outline: none;
  color: var(--color-accent-hover);
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.acoustic-panels-hub .myth-row__link::after {
  content: "→";
  margin-left: var(--space-1);
  color: currentColor;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  transition: transform var(--duration-fast) var(--ease-out);
}

.acoustic-panels-hub .myth-row__link:hover::after,
.acoustic-panels-hub .myth-row__link:focus-visible::after {
  transform: translateX(2px);
}

.acoustic-panels-hub .panel-library-routes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15.75rem), 1fr));
  gap: clamp(var(--space-4), 2.5vw, var(--space-6));
  margin: 0 0 clamp(var(--space-8), 5vw, var(--space-10));
}

.acoustic-panels-hub .panel-library-route {
  position: relative;
  display: grid;
  align-content: start;
  gap: var(--space-3);
  min-width: 0;
  min-height: 11.5rem;
  padding: clamp(var(--space-5), 2.4vw, var(--space-6));
  border: 1px solid var(--color-border, #E5E7EB);
  border-radius: 18px;
  background:
    linear-gradient(
      135deg,
      color-mix(in srgb, var(--color-accent-soft, #DDF7F4) 22%, #FFFFFF 78%) 0%,
      color-mix(in srgb, var(--color-bg, #F2FBF9) 72%, #FFFFFF 28%) 100%
    );
  box-shadow: 0 14px 36px -30px color-mix(in srgb, var(--color-accent, #2BA8A0) 35%, transparent);
  color: inherit;
  text-decoration: none;
  transition:
    background 180ms ease,
    border-color 180ms ease,
    transform 180ms ease,
    box-shadow 180ms ease;
}

.acoustic-panels-hub .panel-library-route__label {
  width: fit-content;
  padding: 3px 8px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--color-accent-soft, #DDF7F4) 52%, #FFFFFF 48%);
  color: var(--color-accent-hover, #047C74);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.acoustic-panels-hub .panel-library-route strong {
  color: var(--color-ink, #111827);
  font-family: var(--font-serif);
  font-size: clamp(20px, 2vw, 24px);
  font-weight: 500;
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-snug);
}

.acoustic-panels-hub .panel-library-route span:not(.panel-library-route__label) {
  color: var(--color-ink-muted, #4B5563);
  font-family: var(--font-serif);
  font-size: clamp(var(--fs-sm), 1.1vw, var(--fs-base));
  line-height: 1.5;
}

.acoustic-panels-hub .panel-library-route:hover,
.acoustic-panels-hub .panel-library-route:focus-visible {
  border-color: color-mix(in srgb, var(--color-accent, #2BA8A0) 34%, var(--color-border, #E5E7EB) 66%);
  background: color-mix(in srgb, var(--color-accent-soft, #DDF7F4) 34%, #FFFFFF 66%);
  box-shadow: 0 12px 32px -18px color-mix(in srgb, var(--color-accent, #2BA8A0) 32%, transparent);
  transform: translateY(-1px);
}

.acoustic-panels-hub .library__filters {
  margin-bottom: var(--space-6);
}

.acoustic-panels-hub .library__item[data-stage="orient"] {
  --stage-color: #2563EB;
}

.acoustic-panels-hub .library__item[data-stage="anatomy"] {
  --stage-color: #7C3AED;
}

.acoustic-panels-hub .library__item[data-stage="quantity"] {
  --stage-color: #D97706;
}

.acoustic-panels-hub .library__item[data-stage="placement"] {
  --stage-color: #0891B2;
}

.acoustic-panels-hub .library__item[data-stage="rooms"] {
  --stage-color: #059669;
}

.acoustic-panels-hub .library__item[data-stage="picks"] {
  --stage-color: #0284C7;
}

.acoustic-panels-hub .library__item[data-stage="install"] {
  --stage-color: #B45309;
}

.acoustic-panels-hub .library__item {
  border-left: 3px solid var(--stage-color, transparent);
}

.acoustic-panels-hub .library__stage-tag {
  color: var(--stage-color, var(--color-accent, #2BA8A0));
}

.acoustic-panels-hub .library__filter-dot {
  display: inline-block;
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  margin-right: 2px;
  border-radius: 50%;
  background: var(--color-accent, #2BA8A0);
}

.acoustic-panels-hub [data-filter="all"] .library__filter-dot {
  background: var(--color-accent, #2BA8A0);
}

.acoustic-panels-hub [data-filter="orient"] .library__filter-dot {
  background: #2563EB;
}

.acoustic-panels-hub [data-filter="anatomy"] .library__filter-dot {
  background: #7C3AED;
}

.acoustic-panels-hub [data-filter="quantity"] .library__filter-dot {
  background: #D97706;
}

.acoustic-panels-hub [data-filter="placement"] .library__filter-dot {
  background: #0891B2;
}

.acoustic-panels-hub [data-filter="rooms"] .library__filter-dot {
  background: #059669;
}

.acoustic-panels-hub [data-filter="picks"] .library__filter-dot {
  background: #0284C7;
}

.acoustic-panels-hub [data-filter="install"] .library__filter-dot {
  background: #B45309;
}

.acoustic-panels-hub .library__link {
  padding-left: var(--space-3);
  transition:
    margin-inline 180ms ease,
    padding-left var(--duration-base) var(--ease-out),
    padding-right 180ms ease,
    background 180ms ease,
    box-shadow 180ms ease,
    border-radius 180ms ease;
}

.acoustic-panels-hub .library__link:hover,
.acoustic-panels-hub .library__link:focus-visible {
  margin-inline: var(--space-1);
  padding-inline: var(--space-3);
  border-radius: 8px;
  background: color-mix(in srgb, var(--stage-color, var(--color-accent, #2BA8A0)) 8%, #FFFFFF 92%);
  box-shadow: inset 3px 0 0 color-mix(in srgb, var(--stage-color, var(--color-accent, #2BA8A0)) 70%, transparent);
}

.acoustic-panels-hub .library__item:target .library__link {
  margin-inline: var(--space-1);
  padding-inline: var(--space-3);
  border-radius: 8px;
  border-color: var(--stage-color, var(--color-accent, #2BA8A0));
  box-shadow: inset 3px 0 0 var(--stage-color, var(--color-accent, #2BA8A0));
  background: color-mix(in srgb, var(--stage-color, var(--color-accent, #2BA8A0)) 10%, #FFFFFF 90%);
}

.acoustic-panels-hub .adj-card[data-hub="acoustic"] {
  --hub-accent: #0891B2;
}

.acoustic-panels-hub .adj-card[data-hub="bass-traps"] {
  --hub-accent: #0D9488;
}

.acoustic-panels-hub .adj-card[data-hub="foam"] {
  --hub-accent: #06B6D4;
}

.acoustic-panels-hub .adj-card[data-hub="diffusers"] {
  --hub-accent: #B45309;
}

.acoustic-panels-hub .adj-card[data-hub="soundproofing"] {
  --hub-accent: #7C3AED;
}

.acoustic-panels-hub .adj-reads {
  display: flex;
  flex-direction: row;
  gap: clamp(var(--space-4), 2.2vw, var(--space-6));
  overflow-x: auto;
  overflow-y: visible;
  scroll-snap-type: x mandatory;
  scroll-padding-inline: 0;
  padding: var(--space-2) 0 var(--space-4);
  margin: 0;
  scrollbar-width: thin;
  scrollbar-color: color-mix(in srgb, var(--color-accent, #2BA8A0) 25%, transparent) transparent;
  -webkit-overflow-scrolling: touch;
  -webkit-mask-image: linear-gradient(to right, black 0, black calc(100% - 32px), transparent 100%);
  mask-image: linear-gradient(to right, black 0, black calc(100% - 32px), transparent 100%);
}

.acoustic-panels-hub .adj-reads::-webkit-scrollbar {
  height: 6px;
}

.acoustic-panels-hub .adj-reads::-webkit-scrollbar-track {
  background: transparent;
}

.acoustic-panels-hub .adj-reads::-webkit-scrollbar-thumb {
  border-radius: 4px;
  background: color-mix(in srgb, var(--color-accent, #2BA8A0) 22%, transparent);
}

.acoustic-panels-hub .adj-reads::-webkit-scrollbar-thumb:hover {
  background: color-mix(in srgb, var(--color-accent, #2BA8A0) 40%, transparent);
}

.acoustic-panels-hub .adj-reads .adj-card {
  flex: 0 0 min(84vw, 21rem);
  scroll-snap-align: start;
}

.acoustic-panels-hub .adj-card {
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  color: inherit;
  text-decoration: none;
  border: 1px solid var(--color-border, #E5E7EB);
  border-radius: 12px;
  background: color-mix(in srgb, var(--hub-accent, var(--color-accent, #2BA8A0)) 4%, #FFFFFF 96%);
  transition: border-color 280ms ease, box-shadow 280ms ease, transform 280ms ease;
}

.acoustic-panels-hub .adj-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 3px;
  background: var(--hub-accent, var(--color-accent, #2BA8A0));
  opacity: 0.6;
  transition: opacity 200ms ease;
}

.acoustic-panels-hub .adj-card__visual {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6) var(--space-5) var(--space-3);
  background: color-mix(in srgb, var(--hub-accent, var(--color-accent, #2BA8A0)) 3%, transparent);
}

.acoustic-panels-hub .adj-card__svg {
  display: block;
  width: 100%;
  max-width: 160px;
  height: auto;
  color: var(--hub-accent, var(--color-accent, #2BA8A0));
  opacity: 0.72;
  transition: opacity 280ms ease;
}

.acoustic-panels-hub .adj-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-5);
}

.acoustic-panels-hub .adj-card__role {
  color: var(--hub-accent, var(--color-accent, #2BA8A0));
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.acoustic-panels-hub .adj-card__name {
  margin: 0;
  color: var(--color-ink, #111827);
  font-family: var(--font-sans);
  font-size: var(--fs-xl, 24px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0;
  transition: color 200ms ease;
}

.acoustic-panels-hub .adj-card__hook {
  flex: 1;
  margin: 0;
  color: var(--color-ink-muted, #6B7280);
  font-family: var(--font-serif, "Source Serif 4", serif);
  font-size: var(--fs-sm, 14px);
  line-height: 1.6;
}

.acoustic-panels-hub .adj-card__cta {
  margin-top: var(--space-2);
  color: var(--hub-accent, var(--color-accent, #2BA8A0));
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: letter-spacing 200ms ease;
}

@media (hover: hover) and (pointer: fine) {
  .acoustic-panels-hub .adj-card:hover,
  .acoustic-panels-hub .adj-card:focus-visible {
    border-color: var(--hub-accent, var(--color-accent, #2BA8A0));
    box-shadow: 0 12px 32px -8px color-mix(in srgb, var(--hub-accent, var(--color-accent, #2BA8A0)) 20%, transparent);
    transform: translateY(-3px);
  }

  .acoustic-panels-hub .adj-card:hover::before,
  .acoustic-panels-hub .adj-card:focus-visible::before {
    opacity: 1;
  }

  .acoustic-panels-hub .adj-card:hover .adj-card__svg,
  .acoustic-panels-hub .adj-card:focus-visible .adj-card__svg {
    opacity: 0.88;
  }

  .acoustic-panels-hub .adj-card:hover .adj-card__name,
  .acoustic-panels-hub .adj-card:focus-visible .adj-card__name {
    color: var(--hub-accent, var(--color-accent, #2BA8A0));
  }

  .acoustic-panels-hub .adj-card:hover .adj-card__cta,
  .acoustic-panels-hub .adj-card:focus-visible .adj-card__cta {
    letter-spacing: 0.06em;
  }
}

@media (min-width: 780px) {
  .acoustic-panels-hub .adj-reads .adj-card {
    flex-basis: clamp(21rem, 34vw, 23.5rem);
  }
}

@media (min-width: 1120px) {
  .acoustic-panels-hub .adj-reads .adj-card {
    flex-basis: clamp(22rem, 29vw, 25rem);
  }
}

@media (max-width: 520px) {
  .acoustic-panels-hub .adj-card__visual {
    padding: var(--space-4) var(--space-4) var(--space-2);
  }

  .acoustic-panels-hub .adj-card__svg {
    max-width: 120px;
  }
}

@media (min-width: 700px) {
  .acoustic-panels-hub .stage-columns,
  .acoustic-panels-hub .placement-stack,
  .panels-room-router,
  .acoustic-panels-hub .install-grid,
  .acoustic-panels-hub .room-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .acoustic-panels-hub .panels-room-router__visual {
    position: static;
  }
}

@media (max-width: 899px) and (min-width: 620px) {
  .acoustic-panels-hub .myth-row {
    column-gap: var(--space-5);
    padding: var(--space-6) 0;
  }

  .acoustic-panels-hub .myth-row__claim {
    font-size: var(--fs-lg);
  }
}

@media (max-width: 619px) {
  .acoustic-panels-hub .myth-row {
    grid-template-columns: 1fr;
    row-gap: var(--space-4);
    padding: var(--space-6) 0;
  }

  .acoustic-panels-hub .myth-row__divider {
    justify-content: flex-start;
    width: 24px;
    height: 24px;
    transform: rotate(90deg);
  }

  .acoustic-panels-hub .myth-row__claim {
    font-size: var(--fs-lg);
  }
}