@import url("fonts.css");
:root {
  --navy: #0a243e;
  --deep: #071b2e;
  --blue: #006ca5;
  --orange: #ff7c39;
  --ink: #122e43;
  --muted: #546d7f;
  --line: #dce6ec;
  --paper: #f1f6f9;
  --bs-primary: #006ca5;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 110px;
}
body {
  margin: 0;
  background: #fff;
  color: var(--ink);
  font-family: "Inter", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.75;
}
a {
  color: var(--blue);
  text-underline-offset: 4px;
}
button,
input,
select {
  font: inherit;
}
img {
  max-width: 100%;
  height: auto;
}
header {
  height: 94px;
  padding: 0 4.3%;
  background: var(--deep);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid #ffffff18;
}
.brand {
  color: white;
  display: flex;
  gap: 12px;
  align-items: center;
  text-decoration: none;
  line-height: 1.2;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 1.8px;
  flex-shrink: 0;
}
.brand:hover {
  color: white;
}
.brand-mark {
  background: var(--orange);
  color: var(--deep);
  width: 47px;
  height: 47px;
  display: grid;
  place-items: center;
  font-weight: 900;
  letter-spacing: -2px;
  font-size: 24px;
  border-radius: 12px;
}
.brand small {
  display: block;
  color: #bdd0df;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.6px;
  margin-top: 6px;
}
nav {
  display: flex;
  align-items: center;
  gap: 24px;
}
nav a {
  font-size: 14px;
  color: #d7e2eb;
  text-decoration: none;
  position: relative;
  padding: 10px 0;
}
nav small {
  color: #a9bdce;
  font-size: 10px;
  vertical-align: top;
  margin-right: 4px;
}
nav a:hover,
nav a.active {
  color: white;
}
nav a.active:after {
  content: "";
  position: absolute;
  height: 3px;
  border-radius: 3px;
  background: var(--orange);
  left: 0;
  right: 0;
  bottom: 0;
}
.menu-toggle {
  display: none;
}
.skip {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 100;
  background: white;
  padding: 12px;
}
.skip:focus {
  top: 10px;
}
h1,
h2,
h3 {
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.04em;
}
h1 {
  font-size: clamp(42px, 5.5vw, 78px);
}
h2 {
  font-size: clamp(29px, 3.3vw, 45px);
}
h3 {
  font-size: 24px;
}
.eyebrow {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 2px;
  line-height: 1.6;
  color: #bf4b10;
  margin: 0 0 22px;
}
.btn {
  padding: 15px 24px;
  border-radius: 7px;
  font-size: 15px;
  font-weight: 750;
  border: 1px solid transparent;
  line-height: 1.5;
}
.btn-primary {
  background: var(--orange);
  color: #082339;
  border-color: var(--orange);
}
.btn-primary:hover,
.btn-primary:focus {
  background: #ff955c;
  color: #082339;
  border-color: #ff955c;
}
.btn-primary:disabled {
  background: #e1e7ed;
  border-color: #e1e7ed;
  color: #667985;
}
.btn-outline-primary {
  border-color: var(--blue);
  color: var(--blue);
}
.btn-light {
  background: white;
  color: var(--deep);
}
.btn span {
  padding-left: 18px;
}
.hero {
  background: var(--deep);
  color: white;
  min-height: 700px;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  padding: 60px 5% 65px;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.hero .eyebrow {
  color: #ffab7e;
}
.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 640px;
}
.hero h1 {
  margin: 0 0 25px;
  letter-spacing: -0.055em;
}
.hero em {
  font-style: normal;
  color: #ff995e;
}
.hero-intro {
  font-size: 15px;
  line-height: 1.8;
  color: #c4d4df;
  max-width: 540px;
}
.hero strong {
  color: white;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 25px;
  margin-top: 30px;
}
.hero-actions > a:not(.btn) {
  font-size: 14px;
  color: #dce8ef;
  text-decoration: none;
}
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 540px;
}
.hero-visual > img {
  position: relative;
  width: 100%;
  max-width: 650px;
  z-index: 1;
  filter: drop-shadow(0 25px 20px #0006);
}
.orbit {
  position: absolute;
  aspect-ratio: 1;
  width: 93%;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 35%, #145575, #0b334b 65%, #092840);
  border: 1px solid #5ba5c529;
}
.hero-label {
  position: absolute;
  bottom: 8%;
  right: -1%;
  z-index: 2;
  background: #102c45ee;
  border: 1px solid #ffffff28;
  border-radius: 10px;
  padding: 16px 25px;
  box-shadow: 0 10px 50px #0003;
  line-height: 1.5;
}
.hero-label span {
  display: block;
  font-size: 9px;
  letter-spacing: 1.5px;
  color: #ffae7e;
}
.hero-label b {
  display: block;
  font-size: 20px;
}
.hero-label small {
  color: #aec6d6;
  font-size: 12px;
}
.intro {
  padding: 82px 6%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 60px;
  max-width: 1440px;
  margin: auto;
}
.intro .eyebrow {
  grid-column: 1/-1;
}
.intro h2 {
  max-width: 580px;
  margin: 0;
}
.intro > p:last-child {
  align-self: center;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.9;
  margin: 0;
}
.trail {
  padding: 65px 6% 85px;
  background: var(--paper);
}
.section-title {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  align-items: end;
  margin-bottom: 35px;
}
.section-title .eyebrow {
  margin-bottom: 12px;
}
.section-title h2 {
  margin: 0;
}
.section-title > span {
  font-size: 13px;
  color: var(--muted);
  white-space: nowrap;
}
.modules {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.module {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--ink);
  background: white;
  border: 1px solid #dce7ef;
  border-radius: 12px;
  overflow: hidden;
  transition:
    transform 0.2s,
    box-shadow 0.2s;
}
.module:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 35px #11314b16;
  color: var(--ink);
}
.module-image {
  height: 230px;
  position: relative;
  background: #e6edf2;
  overflow: hidden;
}
.module-image > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.module-image.product > img {
  object-fit: contain;
  padding: 10px;
}
.module-num {
  position: absolute;
  top: 16px;
  left: 16px;
  width: 34px;
  height: 34px;
  background: var(--deep);
  color: white;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 800;
}
.module-copy {
  padding: 24px;
  display: flex;
  flex: 1;
  flex-direction: column;
}
.module-copy > p {
  font-size: 10px;
  letter-spacing: 1.8px;
  font-weight: 800;
  color: #b64c17;
  margin-bottom: 10px;
}
.module-copy h3 {
  font-size: 25px;
  margin: 0 0 12px;
}
.module-copy > span {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  display: block;
  margin-bottom: 25px;
}
.module-copy > b {
  font-size: 13px;
  color: var(--blue);
  margin-top: auto;
}
.spotlight {
  margin: 75px 6%;
  border-radius: 18px;
  overflow: hidden;
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  background: var(--navy);
  color: white;
  align-items: center;
}
.spotlight > div {
  padding: 48px;
}
.spotlight .eyebrow {
  color: #ffac7c;
}
.spotlight h2 {
  font-size: 50px;
  margin-bottom: 20px;
}
.spotlight p:not(.eyebrow) {
  font-size: 15px;
  color: #c3d4e0;
}
.spotlight figure {
  margin: 0;
  padding: 30px 30px 25px 0;
}
.spotlight img {
  border-radius: 8px;
  width: 100%;
}
.spotlight figcaption {
  color: #b5c7d4;
  font-size: 11px;
  margin-top: 12px;
}
.closing {
  text-align: center;
  padding: 35px 6% 90px;
  max-width: 1050px;
  margin: auto;
}
.closing h2 {
  font-size: 40px;
}
.closing > p:not(.eyebrow) {
  color: var(--muted);
  margin: 24px auto;
  max-width: 700px;
}
.closing > span {
  font-size: 14px;
  display: inline-block;
  background: #eaf4f9;
  border: 1px solid #d2e5ef;
  padding: 12px 25px;
  border-radius: 50px;
}
.chapter-hero {
  background: var(--paper);
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  align-items: center;
  padding: 35px 6%;
  min-height: 405px;
  gap: 55px;
  border-bottom: 1px solid var(--line);
}
.chapter-hero h1 {
  font-size: clamp(36px, 4.4vw, 62px);
  max-width: 660px;
  margin-bottom: 22px;
}
.chapter-hero > div > p:not(.eyebrow) {
  color: var(--muted);
  max-width: 540px;
  font-size: 17px;
}
.jump-link {
  font-size: 14px;
  font-weight: bold;
  text-decoration: none;
}
.chapter-cover {
  margin: 0;
  max-height: 330px;
  overflow: hidden;
  border-radius: 16px;
}
.chapter-cover img {
  width: 100%;
  height: 310px;
  object-fit: contain;
}
.chapter-cover.screen {
  box-shadow: 0 12px 35px #143c5419;
  background: white;
}
.chapter-cover.screen img {
  object-fit: cover;
}
.chapter-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 70px;
  max-width: 1360px;
  padding: 55px 5%;
  margin: auto;
  align-items: start;
}
.chapter-index {
  position: sticky;
  top: 126px;
  max-height: calc(100vh - 150px);
  overflow-y: auto;
  padding-right: 16px;
}
.chapter-index > p {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1.8px;
  color: #6b8191;
  margin-bottom: 18px;
}
.chapter-index > a {
  font-size: 12px;
  line-height: 1.55;
  display: block;
  text-decoration: none;
  color: #566e80;
  border-left: 2px solid #e1e9ed;
  padding: 9px 0 9px 16px;
}
.chapter-index > a:hover,
.chapter-index > a.active {
  color: var(--blue);
  border-color: var(--orange);
  background: #f5f9fb;
}
.chapter-index > a.back-top {
  border: none;
  font-weight: bold;
  padding-left: 0;
  margin-top: 25px;
}
.reading {
  min-width: 0;
  max-width: 880px;
}
.lesson {
  padding: 0 0 50px;
  margin-bottom: 45px;
  border-bottom: 1px solid var(--line);
  display: flow-root;
  scroll-margin-top: 125px;
}
.lesson > h2 {
  font-size: 30px;
  letter-spacing: -0.035em;
  line-height: 1.25;
  margin-bottom: 27px;
  display: flex;
  gap: 15px;
  align-items: baseline;
}
.section-number {
  font-size: 13px;
  letter-spacing: 0;
  color: var(--blue);
  background: #eaf3f8;
  border-radius: 7px;
  min-width: 34px;
  height: 34px;
  display: inline-grid;
  place-items: center;
  align-self: flex-start;
  flex-shrink: 0;
  margin-top: 3px;
}
.lesson p {
  font-size: 16px;
  line-height: 1.85;
  margin-bottom: 19px;
}
.lesson h3 {
  font-size: 22px;
  line-height: 1.3;
  margin: 26px 0 12px;
}
.lesson strong {
  color: #0b3754;
}
.steps {
  padding-left: 0;
  list-style: none;
  counter-reset: step;
}
.steps li {
  position: relative;
  margin: 0 0 14px;
  padding: 13px 16px 13px 51px;
  background: #f3f7fa;
  border-radius: 7px;
  font-size: 15px;
  line-height: 1.8;
}
.steps li:before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: 16px;
  left: 16px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
}
.note {
  background: #fff1e7;
  border-left: 4px solid var(--orange);
  padding: 22px 25px;
  margin: 25px 0;
  font-size: 15px;
  line-height: 1.8;
  border-radius: 0 8px 8px 0;
}
.media {
  margin: 28px 0;
  clear: both;
}
.zoom-image {
  position: relative;
  display: block;
  padding: 0;
  border: 1px solid #d9e4ec;
  border-radius: 10px;
  overflow: hidden;
  cursor: zoom-in;
  width: 100%;
  background: #eef3f6;
}
.zoom-image img {
  display: block;
  max-height: 600px;
  object-fit: contain;
  width: 100%;
}
.zoom-tag {
  position: absolute;
  bottom: 10px;
  right: 10px;
  border-radius: 5px;
  background: #08243edb;
  color: white;
  font-size: 10px;
  letter-spacing: 0.4px;
  padding: 6px 10px;
  opacity: 0;
  transition: opacity 0.2s;
}
.zoom-image:hover .zoom-tag,
.zoom-image:focus .zoom-tag {
  opacity: 1;
}
.media figcaption {
  font-size: 12px;
  line-height: 1.65;
  color: #657d8e;
  padding: 11px 2px;
}
.media.product .zoom-image img {
  max-height: 350px;
  padding: 20px;
}
.equipment-map {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 25px;
  background: var(--paper);
  padding: 20px;
  border-radius: 12px;
  align-items: center;
  margin: 28px 0;
}
.equipment-map .media {
  margin: 0;
}
.equipment-map .zoom-image {
  border: 0;
}
.component-list > div {
  border-bottom: 1px solid var(--line);
  padding: 14px 0;
}
.component-list > div:last-child {
  border: 0;
}
.component-list b {
  font-size: 14px;
}
.component-list p {
  font-size: 13px;
  line-height: 1.7;
  margin: 7px 0;
}
.float-media {
  max-width: 370px;
  margin: 0 auto 30px;
}
.visual-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.photo-sequence {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
}
.photo-sequence .media {
  margin-top: 0;
}
.photo-sequence img {
  aspect-ratio: 1.5;
  object-fit: cover;
}
.media-credit {
  font-size: 11px !important;
  color: #687c8b;
}
.table {
  font-size: 14px;
  line-height: 1.65;
  border-color: #dee7ed;
  margin: 0;
}
.table-responsive {
  border: 1px solid #dae5eb;
  border-radius: 10px;
  margin: 25px 0;
}
.table th {
  background: #0d304d;
  color: white;
  padding: 15px 18px;
  vertical-align: middle;
}
.table td {
  padding: 16px 18px;
  vertical-align: top;
  color: var(--ink);
}
.table tr:nth-child(even) td {
  background: #f5f8fa;
}
.material-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
  margin: 30px 0;
}
.material-cards > div {
  padding: 22px 20px;
  background: #edf4f8;
  border-radius: 10px;
  border-top: 4px solid #a5bbc9;
}
.material-cards > div:first-child {
  background: #e4f4ef;
  border-color: #15795b;
}
.material-cards span {
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 1.1px;
}
.material-cards h3 {
  font-size: 35px;
  margin: 14px 0;
}
.material-cards p {
  font-size: 13px;
  line-height: 1.65;
  margin: 0;
}
.process-strip {
  display: flex;
  align-items: center;
  gap: 13px;
  margin: 25px 0;
  flex-wrap: wrap;
}
.process-strip span {
  padding: 13px;
  background: #edf4f8;
  border-radius: 8px;
  font-weight: bold;
  font-size: 13px;
}
.process-strip b {
  color: #c45318;
}
.checklist {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.checklist label {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 17px;
  border: 1px solid #dce6ed;
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.5;
  cursor: pointer;
}
.checklist input {
  width: 20px;
  height: 20px;
  accent-color: #0077a9;
  flex-shrink: 0;
}
.checklist label:has(input:checked) {
  background: #edf8f3;
  border-color: #80b39e;
}
.check-result {
  font-size: 14px !important;
  font-weight: bold;
  margin-top: 20px;
  color: #0078a9;
}
.calculator {
  padding: 28px;
  background: var(--navy);
  border-radius: 12px;
  color: white;
  margin: 30px 0;
}
.calculator h3 {
  margin-top: 0;
}
.calculator label {
  display: inline-block;
  margin: 10px 20px 10px 0;
  font-size: 14px;
  max-width: 220px;
}
.calculator input,
.calculator select {
  margin-top: 8px;
  font-size: 16px;
}
.calculator small {
  font-size: 12px;
  color: #bfd4e3;
  display: block;
}
#layerResult {
  font-size: 35px;
  color: #ffab78;
  font-weight: bold;
  margin: 12px 0;
}
.guided {
  background: #eef6fb;
  border: 1px solid #c6deed;
  padding: 28px;
  border-radius: 12px;
  margin: 25px 0;
}
.step-label {
  font-weight: bold;
  color: var(--blue);
  font-size: 15px !important;
}
.step-body {
  min-height: 90px;
  font-size: 16px;
}
.step-buttons {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 25px;
}
.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 25px 0;
}
.compare > div {
  background: #f2f6f9;
  border-radius: 10px;
  padding: 23px;
}
.compare h3 {
  margin: 0 0 16px;
}
.compare p,
.compare li {
  font-size: 14px;
}
.compare .steps li {
  background: white;
}
.download-link {
  display: inline-block;
  text-decoration: none;
  font-size: 13px;
  font-weight: 750;
  color: #006f9e;
  background: #e7f3fa;
  border: 1px solid #bbd9ea;
  padding: 10px 15px;
  border-radius: 6px;
  margin-bottom: 15px;
}
.next {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  margin: 45px 0 25px;
  font-size: 14px;
}
.ref-head {
  background: var(--paper);
  padding: 65px 8%;
}
.ref-head h1 {
  font-size: 52px;
}
.standalone {
  margin: 60px auto;
  padding: 0 20px;
}
.sources li {
  padding: 7px 0;
  font-size: 15px;
}
footer {
  background: var(--deep);
  color: #bccedb;
  padding: 60px 6% 25px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 25px 80px;
  font-size: 14px;
}
footer .brand {
  margin-bottom: 20px;
}
footer p {
  line-height: 1.9;
}
footer > div:nth-child(2) {
  justify-self: end;
}
footer a {
  color: #b9e6ff;
}
.footer-bottom {
  grid-column: 1/-1;
  border-top: 1px solid #ffffff20;
  padding-top: 23px;
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  letter-spacing: 0.4px;
  margin-top: 25px;
}
dialog {
  border: 0;
  border-radius: 12px;
  padding: 18px;
  background: #f7fafc;
  max-width: 94vw;
  width: max-content;
  max-height: 94vh;
  box-shadow: 0 20px 100px #0008;
}
dialog::backdrop {
  background: #061a2ceb;
}
.dialog-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  font-size: 13px;
  margin-bottom: 14px;
}
.dialog-bar button {
  border: 0;
  background: var(--deep);
  color: white;
  padding: 8px 15px;
  border-radius: 5px;
  font-size: 13px;
}
dialog > img {
  max-width: 88vw;
  max-height: 73vh;
  display: block;
  object-fit: contain;
  background: #e9f0f5;
  border-radius: 6px;
  margin: auto;
}
#imageCaption {
  font-size: 12px;
  max-width: 850px;
  margin: 15px 0 0;
  color: var(--muted);
}
:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 4px;
}
@media (min-width: 1500px) {
  .hero,
  .intro,
  .trail,
  .chapter-hero {
    padding-left: max(6%, calc((100vw - 1320px) / 2));
    padding-right: max(6%, calc((100vw - 1320px) / 2));
  }
  .hero {
    grid-template-columns: 1fr 1fr;
  }
  .spotlight {
    max-width: 1320px;
    margin-left: auto;
    margin-right: auto;
  }
}
@media (max-width: 1100px) {
  nav {
    gap: 16px;
  }
  nav a {
    font-size: 12px;
  }
  nav small {
    display: none;
  }
  .hero {
    min-height: 620px;
  }
  .hero h1 {
    font-size: 60px;
  }
  .hero-visual {
    min-height: 450px;
  }
  .modules {
    grid-template-columns: repeat(2, 1fr);
  }
  .module-image {
    height: 250px;
  }
  .module-image.product img {
    padding: 0;
  }
  .chapter-layout {
    gap: 35px;
    grid-template-columns: 200px minmax(0, 1fr);
  }
  .spotlight h2 {
    font-size: 40px;
  }
  .spotlight > div {
    padding: 35px;
  }
  .chapter-hero {
    gap: 20px;
  }
  .equipment-map {
    grid-template-columns: 1fr;
  }
  .equipment-map .media.product img {
    height: 300px;
  }
  .component-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
  }
}
@media (max-width: 760px) {
  html {
    scroll-padding-top: 90px;
  }
  header {
    height: auto;
    min-height: 78px;
    padding: 15px 20px;
    flex-wrap: wrap;
    gap: 15px;
  }
  .brand-mark {
    width: 42px;
    height: 42px;
    font-size: 22px;
  }
  .brand {
    font-size: 16px;
  }
  .menu-toggle {
    display: block;
    background: #17354d;
    color: white;
    border: 1px solid #7590a3;
    border-radius: 6px;
    font-size: 22px;
    width: 43px;
    height: 40px;
  }
  .menu-toggle[aria-expanded="true"] {
    background: #28506c;
  }
  nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  nav.open {
    display: flex;
  }
  nav a {
    padding: 12px;
    font-size: 15px;
    border-bottom: 1px solid #ffffff17;
  }
  nav small {
    display: inline;
  }
  .hero {
    grid-template-columns: 1fr;
    padding: 40px 23px 30px;
    gap: 15px;
    min-height: 0;
  }
  .hero h1 {
    font-size: 52px;
  }
  .hero-intro {
    font-size: 14px;
  }
  .hero .eyebrow {
    font-size: 10px;
    letter-spacing: 1.3px;
  }
  .hero-actions {
    gap: 20px;
    flex-wrap: wrap;
  }
  .hero-visual {
    min-height: 380px;
    max-width: 480px;
    width: 100%;
    margin: auto;
  }
  .hero-visual img {
    max-height: 420px;
    width: auto;
  }
  .hero-label {
    right: 0;
    bottom: 7%;
    padding: 12px 18px;
  }
  .hero-label b {
    font-size: 18px;
  }
  .intro {
    grid-template-columns: 1fr;
    padding: 50px 24px;
    gap: 15px;
  }
  .intro .eyebrow {
    margin-bottom: 4px;
  }
  .intro h2 {
    font-size: 33px;
  }
  .intro > p:last-child {
    font-size: 15px;
  }
  .trail {
    padding: 45px 20px;
  }
  .section-title {
    display: block;
  }
  .section-title h2 {
    font-size: 31px;
  }
  .section-title > span {
    display: block;
    margin-top: 15px;
  }
  .modules {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .module {
    display: grid;
    grid-template-columns: 130px minmax(0, 1fr);
  }
  .module-image {
    height: 100%;
    min-height: 220px;
  }
  .module-image.product img {
    padding: 5px;
  }
  .module-image.screen img {
    object-fit: cover;
    object-position: left;
  }
  .module-num {
    top: 10px;
    left: 10px;
  }
  .module-copy {
    padding: 20px;
  }
  .module-copy h3 {
    font-size: 23px;
  }
  .module-copy > span {
    font-size: 13px;
    margin-bottom: 15px;
  }
  .spotlight {
    margin: 45px 20px;
    grid-template-columns: 1fr;
  }
  .spotlight > div {
    padding: 30px;
  }
  .spotlight h2 {
    font-size: 40px;
  }
  .spotlight figure {
    padding: 0 20px 25px;
  }
  .closing {
    padding: 20px 24px 55px;
  }
  .closing h2 {
    font-size: 31px;
  }
  .closing > p:not(.eyebrow) {
    font-size: 15px;
  }
  .closing > span {
    border-radius: 12px;
    font-size: 13px;
  }
  .chapter-hero {
    grid-template-columns: 1fr;
    padding: 35px 24px;
    gap: 20px;
  }
  .chapter-hero h1 {
    font-size: 43px;
  }
  .chapter-hero .eyebrow {
    margin-bottom: 15px;
  }
  .chapter-hero > div > p:not(.eyebrow) {
    font-size: 15px;
  }
  .chapter-cover {
    max-height: 260px;
  }
  .chapter-cover img {
    height: 250px;
  }
  .chapter-cover.product img {
    height: 260px;
  }
  .chapter-layout {
    display: block;
    padding: 30px 20px;
  }
  .chapter-index {
    position: static;
    max-height: none;
    background: #f1f6f9;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 35px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px 12px;
  }
  .chapter-index > p {
    grid-column: 1/-1;
  }
  .chapter-index > a {
    font-size: 11px;
    padding: 7px 0 7px 10px;
  }
  .chapter-index > a.back-top {
    display: none;
  }
  .lesson {
    margin-bottom: 35px;
    padding-bottom: 35px;
    scroll-margin-top: 100px;
  }
  .lesson > h2 {
    font-size: 26px;
    gap: 12px;
  }
  .lesson p {
    font-size: 15px;
  }
  .steps li {
    font-size: 14px;
  }
  .table th,
  .table td {
    padding: 12px;
    min-width: 130px;
  }
  .table {
    font-size: 13px;
  }
  .note {
    padding: 18px;
    font-size: 14px;
  }
  .visual-grid,
  .photo-sequence {
    grid-template-columns: 1fr;
  }
  .media {
    margin: 20px 0;
  }
  .media figcaption {
    font-size: 11px;
  }
  .media .zoom-tag {
    opacity: 1;
  }
  .equipment-map {
    padding: 15px;
  }
  .component-list {
    grid-template-columns: 1fr;
  }
  .material-cards {
    grid-template-columns: 1fr;
  }
  .material-cards > div {
    padding: 20px;
  }
  .material-cards h3 {
    font-size: 28px;
    margin: 8px 0;
  }
  .compare {
    grid-template-columns: 1fr;
  }
  .checklist {
    grid-template-columns: 1fr;
  }
  .guided {
    padding: 20px;
  }
  .step-body {
    min-height: 140px;
  }
  .step-buttons .btn {
    font-size: 13px;
    padding: 12px 16px;
  }
  .calculator {
    padding: 22px;
  }
  .calculator label {
    display: block;
    max-width: none;
    margin-right: 0;
  }
  .next .btn {
    font-size: 13px;
    padding: 13px 18px;
  }
  .next > a:first-child {
    font-size: 12px;
  }
  .ref-head {
    padding: 40px 23px;
  }
  .ref-head h1 {
    font-size: 38px;
  }
  .standalone {
    margin: 35px auto;
  }
  footer {
    grid-template-columns: 1fr;
    padding: 40px 25px 25px;
    gap: 25px;
  }
  footer > div:nth-child(2) {
    justify-self: start;
  }
  .footer-bottom {
    display: block;
    margin-top: 0;
  }
  .footer-bottom span {
    display: block;
    margin-top: 9px;
  }
  dialog {
    padding: 12px;
  }
  .dialog-bar {
    font-size: 12px;
    gap: 15px;
  }
  dialog > img {
    max-width: 86vw;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    transition: none !important;
  }
}
@media print {
  header,
  .chapter-index,
  .hero-actions,
  .next,
  footer,
  .step-buttons,
  .zoom-tag {
    display: none;
  }
  .chapter-layout {
    display: block;
    padding: 0;
  }
  .lesson {
    break-inside: auto;
    padding: 15px 0;
  }
  .media {
    break-inside: avoid;
  }
  .chapter-hero {
    min-height: 0;
    padding: 20px;
    display: block;
  }
  .chapter-cover {
    display: none;
  }
  .reading {
    max-width: none;
  }
  .note {
    border: 1px solid #999;
  }
  .zoom-image {
    border: 0;
  }
  body {
    font-size: 11pt;
  }
  .lesson p {
    font-size: 11pt;
  }
  .btn,
  .download-link {
    display: none;
  }
}