.service-page-main {
  min-height: 70vh;
}

.service-page-hero {
  padding: 76px 0 58px;
  background: var(--paper);
}

.service-breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-bottom: 25px;
  color: #6a7f89;
  font-size: 12px;
}

.service-breadcrumbs a {
  color: #285d76;
  font-weight: 600;
}

.service-page-hero h1 {
  max-width: 900px;
  margin: 18px 0;
  font-family: var(--font-display);
  font-size: clamp(40px, 6vw, 68px);
  font-weight: 600;
  letter-spacing: -.06em;
  line-height: 1.05;
}

.service-page-lead {
  max-width: 750px;
  margin: 0;
  color: var(--ink-soft);
  font-size: clamp(16px, 2vw, 20px);
  line-height: 1.65;
}

.service-page-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.service-page-actions .button-outline {
  min-height: 50px;
  font-size: 13px;
}

.service-page-content {
  padding: 54px 0 92px;
  background: #fff;
}

.service-page-grid {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(230px, .85fr);
  align-items: start;
  gap: 48px;
}

.service-page-copy {
  max-width: 760px;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.service-page-copy h2 {
  margin: 32px 0 10px;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 27px;
  font-weight: 600;
  letter-spacing: -.035em;
  line-height: 1.2;
}

.service-page-copy h2:first-child {
  margin-top: 0;
}

.service-page-copy h3 {
  margin: 23px 0 7px;
  color: var(--ink);
  font-size: 17px;
}

.service-page-copy p,
.service-page-copy ul {
  margin: 0 0 16px;
}

.service-page-copy ul {
  padding-left: 22px;
}

.service-page-aside {
  position: sticky;
  top: 24px;
  padding: 25px;
  border: 1px solid #d7e5eb;
  border-radius: 5px;
  background: #f5f9fb;
}

.service-page-aside h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 20px;
}

.service-page-aside p {
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.7;
}

.service-page-aside .button {
  width: 100%;
  justify-content: center;
  margin: 7px 0 14px;
}

.service-page-aside > a:not(.button) {
  color: #20556e;
  font-size: 14px;
  font-weight: 700;
}

.service-related {
  margin-top: 50px;
  padding-top: 28px;
  border-top: 1px solid #dbe7ec;
}

.service-related ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  padding: 0;
  list-style: none;
}

.service-related a {
  color: #20556e;
  font-size: 13px;
  font-weight: 700;
}

.iv-flow-section {
  background: #fff;
}

.iv-flow-section .service-page-copy h2 {
  margin-top: 12px;
}

.iv-faq-section {
  background: #f4f9fc;
}

.iv-savings-section {
  background: #f4f9fc;
}

.iv-sources-section {
  background: #fff;
}

.iv-faq-intro {
  max-width: 760px;
  margin-bottom: 26px;
}

.iv-faq-intro h2 {
  margin: 12px 0;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 600;
  letter-spacing: -.045em;
  line-height: 1.15;
}

.iv-faq-intro p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.7;
}

.iv-lto-demo {
  margin: 28px 0;
  padding: 26px 28px 18px;
  border: 1px solid #d7e5eb;
  border-radius: 8px;
  background: linear-gradient(145deg, #fff, #f3f8fa);
  box-shadow: 0 14px 36px rgba(31, 76, 96, .07);
}

.iv-lto-demo-heading {
  max-width: 680px;
}

.iv-lto-demo-heading h3 {
  margin: 8px 0 6px;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 27px);
  font-weight: 600;
  letter-spacing: -.035em;
  line-height: 1.2;
}

.iv-lto-demo-heading p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.6;
}

.iv-lto-model-picker {
  display: inline-flex;
  gap: 4px;
  margin-top: 18px;
  padding: 4px;
  border: 1px solid #d3e2e9;
  border-radius: 999px;
  background: #eef4f7;
}

.iv-lto-model-picker button {
  min-height: 38px;
  padding: 0 16px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: #496674;
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: background .2s ease, color .2s ease, box-shadow .2s ease;
}

.iv-lto-model-picker button[aria-pressed="true"] {
  background: #236b8b;
  color: #fff;
  box-shadow: 0 2px 7px rgba(18, 61, 82, .18);
}

.iv-lto-model-picker button:focus-visible {
  outline: 3px solid #5aa6c9;
  outline-offset: 3px;
}

.iv-lto-svg {
  width: 100%;
  height: auto;
  display: block;
  margin-top: 16px;
  overflow: visible;
}

.iv-lto-label {
  fill: #496674;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
}

.iv-lto-temp-pill {
  fill: #fff;
  stroke: #c9dce4;
  stroke-width: 1.5;
}

.iv-lto-temp-pill-lto {
  fill: #eaf5fa;
  stroke: #91bfd2;
}

.iv-lto-temp-pill-room {
  fill: #fff3e9;
  stroke: #e3ae82;
}

.iv-lto-temp {
  fill: #173f53;
  font-size: 16px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.iv-lto-duct {
  fill: none;
  stroke-width: 18;
  stroke-linecap: round;
}

.iv-lto-airflow {
  fill: none;
  stroke: rgba(255, 255, 255, .88);
  stroke-width: 2.5;
  stroke-dasharray: 3 11;
  stroke-linecap: round;
  animation: iv-lto-flow 1.2s linear infinite;
}

@keyframes iv-lto-flow {
  to { stroke-dashoffset: -28; }
}

.iv-lto-arrow {
  fill: none;
  stroke: #173f53;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.iv-lto-rotor-media {
  transform-box: fill-box;
  transform-origin: center;
  animation: iv-lto-rotor-spin 12s linear infinite;
}

.iv-lto-rotor-disc {
  fill: #e7f0f4;
  stroke: #527c90;
  stroke-width: 2;
}

.iv-lto-rotor-sector.is-warm {
  fill: #ef8d51;
  opacity: .88;
  animation: iv-lto-rotor-warm 8s ease-in-out infinite;
}

.iv-lto-rotor-sector.is-cool {
  fill: #78bad5;
  opacity: .88;
  animation: iv-lto-rotor-cool 8s ease-in-out infinite;
}

.iv-lto-rotor-sector.is-pair-b {
  animation-delay: -2s;
}

@keyframes iv-lto-rotor-warm {
  0%, 40% { fill: #ef8d51; opacity: .95; }
  50%, 90% { fill: #78bad5; opacity: .52; }
  100% { fill: #ef8d51; opacity: .95; }
}

@keyframes iv-lto-rotor-cool {
  0%, 40% { fill: #78bad5; opacity: .52; }
  50%, 90% { fill: #ef8d51; opacity: .95; }
  100% { fill: #78bad5; opacity: .52; }
}

.iv-lto-rotor-spokes {
  fill: none;
  stroke: #688c9b;
  stroke-width: 2.5;
}

.iv-lto-rotor-ring {
  fill: none;
  stroke: #527c90;
  stroke-width: 3;
}

.iv-lto-rotor-hub {
  fill: #f8fbfc;
  stroke: #527c90;
  stroke-width: 2;
}

.iv-lto-rotor-label {
  fill: #173f53;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
}

.iv-lto-demo[data-lto-model="crossflow"] .iv-lto-rotary-only,
.iv-lto-demo[data-lto-model="rotary"] .iv-lto-crossflow-only {
  display: none;
}

.iv-lto-crossflow-flow {
  stroke-dasharray: 3 11;
}

.iv-lto-demo[data-lto-model="crossflow"] #iv-lto-heater,
.iv-lto-demo[data-lto-model="crossflow"] .iv-lto-heater-label,
.iv-lto-demo[data-lto-model="crossflow"] .iv-lto-heater-state {
  transform: translate(-90px, 82px);
}

.iv-lto-demo[data-lto-model="crossflow"] .iv-lto-room-supply-label,
.iv-lto-demo[data-lto-model="crossflow"] .iv-lto-room-supply-temp-pill,
.iv-lto-demo[data-lto-model="crossflow"] .iv-lto-room-supply-temp-label {
  display: none;
}

.iv-lto-demo[data-lto-model="crossflow"] .iv-lto-intermediate-label,
.iv-lto-demo[data-lto-model="crossflow"] .iv-lto-temp-pill-lto,
.iv-lto-demo[data-lto-model="crossflow"] #iv-lto-supply-temp {
  display: none;
}

.iv-lto-crossflow-housing {
  fill: #21536b;
  stroke: #6fa3bc;
  stroke-width: 2;
}

.iv-lto-crossflow-core {
  fill: #dceaf1;
  stroke: #9fc3d4;
  stroke-width: 2;
}

.iv-lto-crossflow-core-highlight {
  fill: none;
  stroke: #a9dcef;
  stroke-width: 4;
  opacity: .48;
}

.iv-lto-crossflow-core-grid {
  fill: none;
  stroke: #8eb4c4;
  stroke-width: 1.5;
}

.iv-lto-crossflow-thermal {
  fill: none;
  stroke: #e5813a;
  stroke-width: 3.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  animation: iv-lto-crossflow-thermal 2.4s ease-in-out infinite;
}

@keyframes iv-lto-crossflow-thermal {
  0%, 100% { opacity: .3; stroke: #69b6d4; }
  50% { opacity: 1; stroke: #ef8a4d; }
}

@keyframes iv-lto-rotor-spin {
  to { transform: rotate(360deg); }
}

.iv-lto-heater-body {
  fill: #f1f6f8;
  stroke: #6d91a0;
  stroke-width: 2;
  transition: fill .25s ease, stroke .25s ease, filter .25s ease;
}

.iv-lto-heater-coil {
  fill: none;
  stroke: #718c98;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: stroke .25s ease;
}

.iv-lto-heater-led {
  fill: #6d91a0;
  transition: fill .25s ease;
}

.iv-lto-heater-label,
.iv-lto-heater-state {
  fill: #496674;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .06em;
}

.iv-lto-heater-state {
  fill: #607985;
  font-size: 8px;
  letter-spacing: .025em;
}

.iv-lto-heater.is-active .iv-lto-heater-body {
  fill: #fff0df;
  stroke: #c86d36;
  filter: drop-shadow(0 0 7px rgba(232, 137, 69, .45));
}

.iv-lto-heater.is-active .iv-lto-heater-coil {
  stroke: #d66e32;
  animation: iv-lto-heater-warm 1s ease-in-out infinite alternate;
}

.iv-lto-heater.is-active .iv-lto-heater-led {
  fill: #d66e32;
}

@keyframes iv-lto-heater-warm {
  to { opacity: .5; }
}

.iv-lto-heat-transfer {
  fill: none;
  stroke: #d47535;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
  animation: iv-lto-heat 2s ease-in-out infinite;
}

@keyframes iv-lto-heat {
  0%, 100% { opacity: .45; }
  50% { opacity: 1; }
}

.iv-lto-temp-summary {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin-top: 6px;
}

.iv-lto-mobile {
  display: none;
}

.iv-lto-temp-summary span {
  display: flex;
  flex-direction: column;
  gap: 4px;
  color: #607985;
  font-size: 11px;
  line-height: 1.45;
}

.iv-lto-temp-summary strong {
  color: #173f53;
  font-size: 16px;
  font-variant-numeric: tabular-nums;
}

.iv-lto-demo figcaption {
  margin-top: 12px;
  color: #607985;
  font-size: 11px;
  line-height: 1.6;
}

.iv-savings-calculator {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(250px, .8fr);
  gap: 32px;
  padding: 30px;
  border: 1px solid #d7e5eb;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 14px 36px rgba(31, 76, 96, .07);
}

.iv-savings-controls {
  display: grid;
  gap: 20px;
}

.iv-savings-control {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 9px 18px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 650;
}

.iv-savings-control > label {
  align-self: center;
  color: var(--ink);
  font-size: 13px;
  font-weight: 650;
}

.iv-savings-value-unit {
  display: flex;
  align-items: center;
  justify-self: end;
  gap: 9px;
}

.iv-savings-control output {
  color: #28627d;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.iv-savings-value-unit select {
  min-height: 32px;
  padding: 4px 24px 4px 9px;
  border: 1px solid #cbdce4;
  border-radius: 4px;
  background: #f7fafc;
  color: #20556e;
  font: inherit;
  font-size: 12px;
  font-weight: 700;
}

.iv-savings-value-unit select:focus-visible {
  outline: 3px solid #5aa6c9;
  outline-offset: 3px;
}

.iv-savings-control input {
  width: 100%;
  grid-column: 1 / -1;
  margin: 0;
  accent-color: #286f91;
  cursor: pointer;
}

.iv-savings-control-help {
  grid-column: 1 / -1;
  margin-top: -4px;
  color: #607985;
  font-size: 11px;
  font-weight: 400;
  line-height: 1.5;
}

.iv-savings-control input:focus-visible {
  outline: 3px solid #5aa6c9;
  outline-offset: 5px;
}

.iv-savings-result {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: 26px;
  border-radius: 6px;
  background: #173f53;
  color: #fff;
}

.iv-savings-result-label {
  color: #c2d9e4;
  font-size: 12px;
  line-height: 1.5;
}

.iv-savings-result strong {
  margin: 3px 0 20px;
  color: #a8dcf0;
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 46px);
  font-weight: 600;
  letter-spacing: -.04em;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}

.iv-savings-result strong:last-of-type {
  margin-bottom: 18px;
  color: #f2c45a;
}

.iv-savings-result p {
  margin: 0;
  color: #d0e0e7;
  font-size: 12px;
  line-height: 1.65;
}

.iv-bird-comparison {
  --lto-exhaust-strength: .2;
  margin-top: 28px;
  padding: 24px;
  border: 1px solid #d7e5eb;
  border-radius: 8px;
  background: linear-gradient(145deg, #fff, #f3f8fa);
}

.iv-bird-comparison-heading {
  max-width: 680px;
}

.iv-bird-comparison-heading h3 {
  margin: 8px 0 6px;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 600;
  letter-spacing: -.035em;
  line-height: 1.2;
}

.iv-bird-comparison-heading p,
.iv-bird-scene-caption,
.iv-bird-comparison-note {
  color: var(--ink-soft);
  font-size: 12px;
  line-height: 1.6;
}

.iv-bird-comparison-heading p {
  margin: 0;
}

.iv-bird-comparison-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.iv-bird-scene {
  min-width: 0;
  padding: 16px;
  overflow: hidden;
  border: 1px solid #d6e4e9;
  border-radius: 7px;
  background: #f8fbfc;
}

.iv-bird-scene.is-direct-exhaust {
  background: linear-gradient(180deg, #fffaf2, #f8fbfc 78%);
}

.iv-bird-scene.is-heat-recovered {
  background: linear-gradient(180deg, #eff8fc, #f8fbfc 78%);
}

.iv-bird-scene-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
}

.iv-bird-scene-heading h4 {
  margin: 0;
  color: #244e61;
  font-size: 13px;
  font-weight: 750;
  line-height: 1.4;
}

.iv-bird-temp {
  flex: 0 0 auto;
  padding: 4px 9px;
  border: 1px solid #e4b078;
  border-radius: 999px;
  background: #fff8ef;
  color: #945b2f;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  font-weight: 750;
}

.is-heat-recovered .iv-bird-temp {
  border-color: #a9cedd;
  background: #f2f9fc;
  color: #28627d;
}

.iv-bird-scene-art {
  width: 100%;
  max-height: 190px;
  display: block;
  margin: 4px auto 0;
}

.iv-bird-pipe {
  fill: #d9e5e9;
  stroke: #7895a1;
  stroke-width: 2;
}

.iv-bird-pipe-rim {
  fill: none;
  stroke: #527c90;
  stroke-width: 4;
  stroke-linecap: round;
}

.iv-bird-plume {
  fill: none;
  stroke-linecap: round;
  stroke-width: 5;
  stroke-dasharray: 16 9;
  animation: iv-bird-wisp 2.6s ease-in-out infinite;
}

.is-direct-exhaust .is-warm-plume {
  stroke: #e99557;
  opacity: .8;
}

.is-heat-recovered .is-cool-plume {
  stroke: #65abc8;
  opacity: var(--lto-exhaust-strength);
  animation-duration: 4.2s;
}

.iv-bird-plume.is-plume-delay {
  animation-delay: -1.3s;
}

.iv-bird-comparison[data-heat-recovered="no"] .is-heat-recovered .is-cool-plume {
  stroke: #e99557;
}

.iv-bird-heat-dot {
  fill: #efb778;
  animation: iv-bird-sparkle 2.2s ease-in-out infinite;
}

.iv-bird-heat-dot.is-heat-dot-two {
  animation-delay: -1.1s;
}

.iv-bird-nest {
  fill: #b98955;
  stroke: #855f3a;
  stroke-width: 2;
}

.iv-bird-nest-weave {
  fill: none;
  stroke: #e0bd8f;
  stroke-width: 2;
  stroke-linecap: round;
}

.iv-bird-body,
.iv-bird-head {
  fill: #e4b85f;
  stroke: #926c32;
  stroke-width: 1.6;
}

.iv-bird-wing {
  fill: #d29b45;
  stroke: #926c32;
  stroke-width: 1.3;
}

.iv-bird-beak {
  fill: #e98243;
  stroke: #a85c31;
  stroke-width: 1;
}

.iv-bird-eye {
  fill: #263f4a;
}

.iv-bird-feet {
  fill: none;
  stroke: #a85c31;
  stroke-width: 2;
  stroke-linecap: round;
}

.is-direct-exhaust .iv-bird-body,
.is-direct-exhaust .iv-bird-head {
  animation: iv-bird-bob 2.4s ease-in-out infinite;
  transform-box: fill-box;
  transform-origin: center;
}

.is-heat-recovered .iv-bird-body,
.is-heat-recovered .iv-bird-head {
  fill: #d5b75e;
}

.iv-bird-ground {
  fill: none;
  stroke: #c1d3d9;
  stroke-width: 2;
  stroke-linecap: round;
}

.iv-bird-thought {
  fill: #6a7880;
  font-size: 10px;
  font-weight: 700;
  text-anchor: middle;
}

.iv-bird-house {
  fill: #f3d58a;
  stroke: #d4a94e;
  stroke-width: 2;
}

.iv-bird-house-door {
  fill: none;
  stroke: #a9823d;
  stroke-width: 2;
}

.iv-bird-scene-caption {
  min-height: 38px;
  margin: 0;
}

.iv-bird-comparison-note {
  margin: 12px 0 0;
  font-size: 11px;
}

@keyframes iv-bird-wisp {
  0% { stroke-dashoffset: 0; transform: translateY(5px); }
  100% { stroke-dashoffset: -50; transform: translateY(-8px); }
}

@keyframes iv-bird-sparkle {
  0%, 100% { opacity: .25; transform: translateY(4px); }
  50% { opacity: 1; transform: translateY(-4px); }
}

@keyframes iv-bird-bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}

.iv-savings-method {
  max-width: 850px;
  margin: 15px 0 0;
  color: #607985;
  font-size: 12px;
  line-height: 1.65;
}

.iv-savings-source {
  max-width: 850px;
  margin: 10px 0 0;
  color: #607985;
  font-size: 12px;
  line-height: 1.65;
}

.iv-savings-source a {
  color: #205f7b;
  font-weight: 700;
  text-underline-offset: 3px;
}

.iv-savings-source a:focus-visible {
  outline: 3px solid #5aa6c9;
  outline-offset: 3px;
}

.iv-faq-list {
  display: grid;
  gap: 10px;
  max-width: 850px;
}

.iv-faq-list details {
  padding: 18px 20px;
  border: 1px solid #d7e5eb;
  border-radius: 4px;
  background: #fff;
}

.iv-faq-list summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  list-style: none;
  cursor: pointer;
}

.iv-faq-list summary::-webkit-details-marker {
  display: none;
}

.iv-faq-list summary::after {
  flex: 0 0 auto;
  color: #28627d;
  font-size: 20px;
  font-weight: 400;
  content: "+";
}

.iv-faq-list details[open] summary::after {
  content: "\2212";
}

.iv-faq-list summary:focus-visible {
  outline: 3px solid #5aa6c9;
  outline-offset: 4px;
}

.iv-faq-list details p {
  max-width: 760px;
  margin: 13px 0 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.75;
}

.iv-faq-cta {
  margin-top: 24px;
}

.iv-source-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.iv-source-list > a {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  min-height: 92px;
  padding: 18px 20px;
  border: 1px solid #d7e5eb;
  border-radius: 4px;
  background: #f7fafc;
  color: #20556e;
  transition: border-color .2s ease, background-color .2s ease;
}

.iv-source-list > a:hover,
.iv-source-list > a:focus-visible {
  border-color: #8bbbd0;
  background: #f0f7fa;
}

.iv-source-list > a:focus-visible {
  outline: 3px solid #5aa6c9;
  outline-offset: 3px;
}

.iv-source-list > a > span:first-child {
  display: grid;
  gap: 6px;
}

.iv-source-list strong {
  color: var(--ink);
  font-size: 14px;
  line-height: 1.45;
}

.iv-source-list > a > span:first-child > span {
  color: var(--ink-soft);
  font-size: 12px;
  line-height: 1.6;
}

.iv-source-list > a > span:last-child {
  flex: 0 0 auto;
  font-size: 16px;
}

.service-page-mobile-cta {
  display: none;
}

@media (max-width: 640px) {
  .iv-lto-svg,
  .iv-lto-temp-summary {
    display: none;
  }

  .iv-lto-mobile {
    display: grid;
    gap: 10px;
    margin-top: 16px;
  }

  .iv-lto-mobile-flow {
    display: grid;
    align-items: center;
    gap: 4px;
    padding: 12px 10px;
    border: 1px solid #d5e5eb;
    border-radius: 6px;
    background: #f4f9fb;
  }

  .iv-lto-mobile-flow.is-supply {
    grid-template-columns: minmax(42px, .7fr) 12px minmax(52px, .9fr) 12px minmax(68px, 1.2fr) 12px minmax(42px, .7fr);
  }

  .iv-lto-mobile-flow.is-extract {
    grid-template-columns: minmax(55px, 1fr) 14px minmax(72px, 1.2fr) 14px minmax(55px, 1fr);
    background: #fbf7f0;
  }

  .iv-lto-demo[data-lto-model="rotary"] .iv-lto-mobile-flow[data-mobile-model="crossflow"],
  .iv-lto-demo[data-lto-model="crossflow"] .iv-lto-mobile-flow[data-mobile-model="rotary"] {
    display: none;
  }

  .iv-lto-mobile-flow.is-crossflow-path {
    display: block;
    padding: 0;
    border: 0;
    background: transparent;
  }

  .iv-lto-crossflow-mobile-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
    gap: 6px 12px;
    padding: 12px 10px;
    border: 1px solid #d5e5eb;
    border-radius: 6px;
    background: #fbf7f0;
  }

  .iv-lto-crossflow-mobile-grid .is-align-end {
    text-align: right;
  }

  .iv-lto-crossflow-mobile-svg,
  .iv-lto-mobile-crossflow-core-label {
    grid-column: 1 / -1;
  }

  .iv-lto-crossflow-mobile-svg {
    width: 100%;
    height: 84px;
    display: block;
  }

  .iv-lto-mobile-x-supply,
  .iv-lto-mobile-x-extract {
    fill: none;
    stroke-width: 16;
    stroke-linecap: round;
  }

  .iv-lto-mobile-x-airflow {
    fill: none;
    stroke: rgba(255, 255, 255, .9);
    stroke-width: 2;
    stroke-dasharray: 3 8;
    stroke-linecap: round;
    animation: iv-lto-flow 1.2s linear infinite;
  }

  .iv-lto-mobile-x-core {
    fill: #dceaf1;
    stroke: #9fc3d4;
    stroke-width: 2;
  }

  .iv-lto-mobile-x-core-grid {
    fill: none;
    stroke: #8eb4c4;
    stroke-width: 1.5;
  }

  .iv-lto-mobile-crossflow-core-label {
    color: #496674;
    font-size: 9px;
    font-weight: 700;
    text-align: center;
  }

  .iv-lto-mobile-end,
  .iv-lto-mobile-step {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 3px;
  }

  .iv-lto-mobile-end span,
  .iv-lto-mobile-step strong {
    color: #496674;
    font-size: 9px;
    font-weight: 700;
    line-height: 1.3;
    overflow-wrap: anywhere;
  }

  .iv-lto-mobile-end strong,
  .iv-lto-mobile-step span {
    color: #173f53;
    font-size: 13px;
    font-variant-numeric: tabular-nums;
    line-height: 1.3;
  }

  .iv-lto-mobile-step {
    padding: 7px 5px;
    border: 1px solid #c8dbe3;
    border-radius: 4px;
    background: #fff;
    text-align: center;
  }

  .iv-lto-mobile-step.is-lto strong::before {
    width: 12px;
    height: 12px;
    display: inline-block;
    margin-right: 4px;
    border: 1px solid #527c90;
    border-radius: 50%;
    background: conic-gradient(#efb778 0 25%, #e7f0f4 25% 50%, #78bad5 50% 75%, #e7f0f4 75%);
    content: "";
    vertical-align: -2px;
    animation: iv-lto-rotor-spin 5s linear infinite;
  }

  .iv-lto-demo[data-lto-model="crossflow"] .iv-lto-mobile-step.is-lto strong::before {
    border-radius: 0;
    background:
      linear-gradient(45deg, transparent 43%, #7196a5 44% 49%, transparent 50% 93%, #7196a5 94%),
      linear-gradient(-45deg, transparent 43%, #7196a5 44% 49%, transparent 50% 93%, #7196a5 94%),
      #dceaf1;
    clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
    animation: iv-lto-crossflow-thermal 1.8s ease-in-out infinite;
  }

  .iv-lto-mobile-step.is-heater {
    border-color: #c8dbe3;
    background: #fff;
    transition: background .25s ease, border-color .25s ease, box-shadow .25s ease;
  }

  .iv-lto-mobile-step.is-heater.is-active {
    border-color: #d88750;
    background: #fff2e6;
    box-shadow: 0 0 0 2px rgba(216, 135, 80, .12);
  }

  .iv-lto-mobile-step small {
    color: #607985;
    font-size: 8px;
    line-height: 1.35;
  }

  .iv-lto-mobile-arrow {
    color: #357fa2;
    font-size: 14px;
    font-weight: 800;
    text-align: center;
    animation: iv-lto-mobile-flow 1.2s ease-in-out infinite;
  }

  .iv-lto-mobile-flow.is-extract .iv-lto-mobile-arrow {
    color: #be7b3c;
    animation-direction: reverse;
  }

  .iv-lto-crossflow-mobile-arrow {
    color: #be7b3c;
    font-size: 16px;
    font-weight: 800;
    text-align: center;
    animation: iv-lto-mobile-flow 1.2s ease-in-out infinite;
  }

  @keyframes iv-lto-mobile-flow {
    50% { opacity: .45; }
  }

  .iv-source-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .service-page {
    padding-bottom: 62px;
  }

  .service-page-hero {
    padding: 52px 0 42px;
  }

  .iv-lto-demo {
    padding: 20px 18px 16px;
  }

  .iv-lto-temp-summary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .iv-savings-calculator {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 22px;
  }

  .iv-savings-result {
    padding: 22px;
  }

  .iv-bird-comparison {
    padding: 18px;
  }

  .iv-bird-comparison-cards {
    grid-template-columns: 1fr;
  }

  .iv-bird-scene-art {
    max-height: 210px;
  }

  .service-page-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .service-page-aside {
    position: static;
  }
}

@media (max-width: 640px) {
  .service-page .primary-navigation {
    position: static;
    display: flex;
    flex-direction: row;
    gap: 0;
    padding: 0;
    border: 0;
    background: transparent;
    box-shadow: none;
  }

  .service-page .primary-navigation > a:not(.button) {
    display: none;
  }

  .service-page .primary-navigation .button {
    min-height: 40px;
    margin: 0;
    padding: 0 11px;
    font-size: 11px;
  }

  .service-page-mobile-cta {
    position: fixed;
    z-index: 1000;
    right: 0;
    bottom: 0;
    left: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    padding: 8px 12px calc(8px + env(safe-area-inset-bottom));
    border-top: 1px solid #d3e2e9;
    background: rgba(255, 255, 255, .97);
    box-shadow: 0 -5px 20px rgba(25, 60, 77, .1);
  }

  .service-page-mobile-cta a {
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ink);
    font-size: 12px;
    font-weight: 700;
  }

  .service-page-mobile-cta a + a {
    border-radius: 3px;
    background: var(--brand);
    color: #fff;
  }
}

@media (prefers-reduced-motion: reduce) {
  .iv-lto-rotor-media,
  .iv-lto-rotor-sector,
  .iv-lto-airflow,
  .iv-lto-mobile-x-airflow,
  .iv-lto-heat-transfer,
  .iv-lto-heater.is-active .iv-lto-heater-coil,
  .iv-lto-crossflow-thermal,
  .iv-lto-mobile-arrow,
  .iv-lto-crossflow-mobile-arrow,
  .iv-lto-mobile-step.is-rotor strong::before,
  .iv-bird-plume,
  .iv-bird-heat-dot,
  .is-direct-exhaust .iv-bird-body,
  .is-direct-exhaust .iv-bird-head {
    animation: none;
  }
}