/* Only the Capabilities page uses these engineering editorial layouts. */
.engineering-page {
  --engineering-accent: #188b88;
}
.engineering-page section[id] {
  scroll-margin-top: 115px;
}
.engineering-intro {
  padding: 56px 0 70px;
  background: linear-gradient(125deg, #0c273c, #19485c);
  color: white;
}
.engineering-hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 60px;
  align-items: center;
}
.engineering-intro .eyebrow {
  color: #8eddd3;
}
.engineering-intro h1 {
  font-size: clamp(40px, 4.3vw, 58px);
  line-height: 1.12;
  letter-spacing: -0.045em;
  margin: 24px 0;
}
.engineering-intro h1 em {
  color: #83d7d0;
  font-style: normal;
}
.engineering-lead {
  max-width: 510px;
  color: #c4d7e2;
  font-size: 16px;
  line-height: 1.85;
  margin-bottom: 28px;
}
.engineering-cover {
  min-width: 0;
  border: 1px solid #8ec4c334;
  background: #ffffff06;
  border-radius: 14px;
  overflow: hidden;
}
.engineering-cover-top {
  display: flex;
  justify-content: space-between;
  padding: 20px 22px;
  border-bottom: 1px solid #ffffff13;
  font-size: 9px;
  letter-spacing: 0.15em;
  color: #9ad7d1;
}
.engineering-cover img {
  display: block;
  width: 100%;
  height: auto;
  padding: 0 10px;
  filter: drop-shadow(0 20px 15px #0419256b);
}
.engineering-cover-caption {
  padding: 0 22px 23px;
  display: grid;
  gap: 9px;
  font-size: 11px;
  color: #bed2dd;
}
.engineering-cover-caption a {
  color: #8eddd3;
}
.engineering-cover-bottom {
  border-top: 1px solid #ffffff13;
  padding: 19px 22px;
  display: flex;
  gap: 17px;
  color: #c0d5df;
  font-size: 10px;
}
.engineering-cover-bottom b {
  display: block;
  color: #8eddd3;
  font-size: 15px;
  margin-bottom: 5px;
}
.engineering-jumps {
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.engineering-jumps .container {
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
  padding-block: 20px;
}
.engineering-jumps a {
  font-size: 12px;
  font-weight: 650;
}
.engineering-jumps a:hover {
  color: var(--engineering-accent);
}
.engineering-section-heading {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 65px;
  align-items: end;
  margin-bottom: 38px;
}
.engineering-section-heading h2 {
  margin: 14px 0 0;
  font-size: clamp(30px, 3.2vw, 43px);
  line-height: 1.17;
  letter-spacing: -0.04em;
}
.engineering-section-heading > p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
  margin: 0;
  max-width: 470px;
}
.engineering-topic-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.engineering-topic {
  display: flex;
  flex-direction: column;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  transition:
    border-color 0.2s,
    background 0.2s;
}
.engineering-topic:hover {
  border-color: #69b7b1;
  background: #f6fbfa;
}
.engineering-number {
  color: var(--engineering-accent);
  font-size: 12px;
  letter-spacing: 0.12em;
}
.engineering-topic h3 {
  font-size: 25px;
  line-height: 1.25;
  letter-spacing: -0.03em;
  margin: 23px 0 12px;
}
.engineering-topic p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.8;
  margin: 0 0 25px;
}
.engineering-topic-link {
  margin-top: auto;
  border-top: 1px solid var(--line);
  padding-top: 18px;
  font-size: 12px;
  font-weight: 650;
  color: var(--engineering-accent);
}
.engineering-light {
  background: #f3f7f9;
}
.engineering-two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 42px;
  align-items: start;
}
.engineering-two-column > * {
  min-width: 0;
}
.engineering-diagram {
  margin: 0;
  border: 1px solid #d7e4e9;
  border-radius: 12px;
  background: #fff;
  overflow: hidden;
}
.engineering-diagram-label {
  padding: 20px 24px 0;
  color: #52818c;
  font-size: 9px;
  font-weight: 650;
  letter-spacing: 0.14em;
}
.engineering-diagram svg {
  display: block;
  width: 100%;
  height: auto;
}
.engineering-diagram svg text {
  font-family: inherit;
  font-size: 15px;
}
.engineering-diagram svg .diagram-small {
  font-size: 12px;
}
.engineering-diagram figcaption {
  border-top: 1px solid #e2ebef;
  padding: 18px 24px;
  font-size: 12px;
  line-height: 1.8;
  color: #60798a;
}
/* Show inter-zone ducting at full width so its direction is easy to follow. */
.engineering-cascade-scroll {
  overflow-x: auto;
}
.engineering-cascade svg {
  max-width: 960px;
  margin-inline: auto;
}
.engineering-cascade svg .cascade-duct-title,
.engineering-cascade svg .cascade-web-label {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.07em;
  fill: #36596d;
}
.engineering-cascade svg .cascade-pipe-label {
  font-size: 17px;
}
.engineering-cascade svg .cascade-zone-label {
  font-size: 18px;
  font-weight: 700;
  fill: #173f59;
}
.engineering-cascade svg .cascade-temperature {
  font-size: 30px;
  font-weight: 700;
  fill: #173f59;
}
.engineering-cascade-key {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 0 24px 24px;
  padding: 18px 24px;
  border-radius: 8px;
  background: #f3f7f9;
}
.engineering-cascade-key span {
  display: block;
  font-size: 10px;
  letter-spacing: 0.08em;
  color: #60798a;
}
.engineering-cascade-key b {
  display: block;
  margin-top: 5px;
  font-size: 20px;
  color: #173f59;
}
.engineering-cascade-key > div:last-child b {
  color: var(--engineering-accent);
}
.engineering-diagram-hint {
  display: none;
}
.engineering-drying-layout .engineering-note-stack {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 32px;
}
.engineering-drying-layout .engineering-note-stack article {
  border: 0;
  padding: 0;
  margin: 0;
}
.engineering-diagram-dark {
  background: #103147;
  border-color: #234b60;
}
.engineering-diagram-dark .engineering-diagram-label {
  color: #8eddd3;
}
.engineering-diagram-dark figcaption {
  border-color: #ffffff18;
  color: #b1cbd9;
}
.engineering-note-stack article {
  border-bottom: 1px solid #dbe5ea;
  padding: 0 0 23px;
  margin-bottom: 23px;
}
.engineering-note-stack article:last-child {
  margin-bottom: 0;
}
.engineering-kicker {
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.08em;
  color: var(--engineering-accent);
}
.engineering-note-stack h3 {
  margin: 10px 0;
  font-size: 22px;
  line-height: 1.3;
  letter-spacing: -0.02em;
}
.engineering-note-stack p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.85;
  margin: 0;
}
.engineering-review {
  margin-top: 32px;
  padding: 26px 30px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 38px;
  background: #e7f0f1;
  border-radius: 9px;
}
.engineering-review b {
  font-size: 13px;
  color: #265862;
}
.engineering-review p {
  font-size: 13px;
  color: #4b6a79;
  line-height: 1.85;
  margin: 9px 0 0;
}
.engineering-source {
  font-size: 11px;
  color: #688394;
  line-height: 1.8;
  margin: 23px 0 0;
}
.engineering-source a {
  text-decoration: underline;
  text-underline-offset: 3px;
}
.engineering-observation-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 32px;
  border: 1px solid var(--line);
  border-radius: 9px;
}
.engineering-observation-grid > div {
  padding: 25px;
}
.engineering-observation-grid > div + div {
  border-left: 1px solid var(--line);
}
.engineering-observation-grid span,
.engineering-process-strip span {
  font-size: 9px;
  color: var(--engineering-accent);
  letter-spacing: 0.12em;
  font-weight: 650;
}
.engineering-observation-grid h3 {
  margin: 10px 0;
  font-size: 18px;
}
.engineering-observation-grid p {
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
  margin: 0;
}
.engineering-process-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.engineering-process-strip article {
  padding: 27px 23px;
  border-top: 2px solid #71b6b0;
  background: white;
  border-radius: 0 0 8px 8px;
}
.engineering-process-strip h3 {
  font-size: 19px;
  line-height: 1.3;
  margin: 17px 0 12px;
}
.engineering-process-strip p {
  font-size: 13px;
  line-height: 1.85;
  color: var(--muted);
  margin: 0;
}
.engineering-inline-link {
  display: inline-block;
  margin-top: 28px;
  font-size: 13px;
  color: var(--blue);
  font-weight: 650;
}
.engineering-verification-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 60px;
  align-items: start;
}
.engineering-field-notes h3 {
  margin: 0 0 22px;
  font-size: 22px;
}
.engineering-field-notes details {
  border-top: 1px solid var(--line);
  padding: 22px 0;
}
.engineering-field-notes details:last-child {
  border-bottom: 1px solid var(--line);
}
.engineering-field-notes summary {
  cursor: pointer;
  font-size: 15px;
  font-weight: 650;
  line-height: 1.6;
}
.engineering-field-notes summary span {
  color: var(--engineering-accent);
  margin-right: 10px;
  font-size: 11px;
}
.engineering-field-notes details p {
  font-size: 14px;
  line-height: 1.9;
  color: var(--muted);
  margin: 15px 0 0;
}
.engineering-record {
  background: #edf5f4;
  border: 1px solid #d6e9e5;
  border-radius: 12px;
  padding: 32px;
}
.engineering-record h3 {
  font-size: 28px;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin: 15px 0 24px;
}
.engineering-record ol {
  list-style: none;
  counter-reset: trial;
  margin: 0;
  padding: 0;
}
.engineering-record li {
  counter-increment: trial;
  position: relative;
  padding: 0 0 20px 35px;
}
.engineering-record li::before {
  content: counter(trial, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-size: 11px;
  color: #36877c;
}
.engineering-record li b {
  display: block;
  font-size: 13px;
  margin-bottom: 6px;
}
.engineering-record li span {
  display: block;
  font-size: 13px;
  line-height: 1.8;
  color: #5c7886;
}
.engineering-record a {
  display: block;
  margin-top: 6px;
  padding-top: 18px;
  border-top: 1px solid #cfe2df;
  font-size: 13px;
  font-weight: 650;
  color: #187b74;
}
.engineering-next {
  background: linear-gradient(115deg, #153d57, #0d2a3f);
  color: #fff;
  padding: 62px 0;
}
.engineering-next .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 35px;
}
.engineering-next .eyebrow {
  color: #89d9cf;
}
.engineering-next h2 {
  font-size: clamp(30px, 3.1vw, 42px);
  letter-spacing: -0.035em;
  line-height: 1.2;
  margin: 15px 0;
}
.engineering-next p {
  color: #b7d0dd;
  font-size: 14px;
  line-height: 1.85;
  max-width: 580px;
}
.engineering-page a:focus-visible,
.engineering-page summary:focus-visible {
  outline: 3px solid #53b9b2;
  outline-offset: 5px;
  border-radius: 3px;
}
@media (max-width: 1000px) {
  .engineering-hero-grid {
    gap: 30px;
  }
  .engineering-section-heading {
    gap: 35px;
  }
  .engineering-two-column {
    gap: 28px;
  }
  .engineering-verification-grid {
    gap: 32px;
  }
  .engineering-process-strip {
    grid-template-columns: repeat(2, 1fr);
  }
  .engineering-cover-bottom {
    flex-wrap: wrap;
  }
}
@media (max-width: 780px) {
  .engineering-cascade svg {
    min-width: 680px;
  }
  .engineering-cascade-key {
    gap: 12px;
    padding: 16px;
    margin-inline: 16px;
  }
  .engineering-cascade-key span {
    font-size: 9px;
  }
  .engineering-cascade-key b {
    font-size: 16px;
  }
  .engineering-diagram-hint {
    display: block;
    margin: 0 16px 18px;
    color: #60798a;
    font-size: 12px;
  }
  .engineering-drying-layout .engineering-note-stack {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .engineering-intro {
    padding: 35px 0 44px;
  }
  .engineering-hero-grid,
  .engineering-section-heading,
  .engineering-two-column,
  .engineering-review,
  .engineering-verification-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .engineering-intro h1 {
    font-size: 43px;
  }
  .engineering-lead {
    font-size: 15px;
  }
  .engineering-cover {
    max-width: 540px;
  }
  .engineering-jumps .container {
    gap: 12px 22px;
    padding-block: 18px;
  }
  .engineering-jumps a {
    font-size: 11px;
  }
  .engineering-topic-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .engineering-topic {
    padding: 24px;
  }
  .engineering-topic h3 {
    margin: 13px 0;
  }
  .engineering-topic h3 br {
    display: none;
  }
  .engineering-observation-grid {
    grid-template-columns: 1fr;
  }
  .engineering-observation-grid > div + div {
    border-left: 0;
    border-top: 1px solid var(--line);
  }
  .engineering-review {
    padding: 24px;
    gap: 20px;
  }
  .engineering-record {
    padding: 26px;
  }
  .engineering-next .container {
    align-items: flex-start;
    flex-direction: column;
    gap: 15px;
  }
}
@media (max-width: 480px) {
  .engineering-intro h1 {
    font-size: 38px;
  }
  .engineering-process-strip {
    grid-template-columns: 1fr;
  }
  .engineering-diagram-label {
    padding: 18px 16px 0;
    font-size: 8px;
  }
  .engineering-diagram figcaption {
    padding: 15px 16px;
  }
  .engineering-cover-top,
  .engineering-cover-bottom,
  .engineering-cover-caption {
    padding-inline: 18px;
  }
}