:root {
  --ink: #092434;
  --ink-2: #153746;
  --muted: #56707b;
  --paper: #ffffff;
  --mist: #f3f7f6;
  --mist-2: #e8f0ef;
  --line: #cfdddc;
  --teal: #17a9aa;
  --teal-dark: #0b737a;
  --aqua: #5ad2cf;
  --orange: #ed932f;
  --orange-soft: #fff2e3;
  --navy: #062b3c;
  --navy-2: #0b3a4e;
  --success: #147a54;
  --warning: #94610d;
  --danger: #a34135;
  --shadow: 0 18px 50px rgba(9, 36, 52, 0.10);
  --shadow-soft: 0 8px 28px rgba(9, 36, 52, 0.07);
  --shell: min(1320px, calc(100vw - 48px));
  --reading: 800px;
  --radius: 18px;
  --radius-sm: 10px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 112px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.68;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.nav-open {
  overflow: hidden;
}

img,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

figure {
  margin: 0;
}

a {
  color: var(--teal-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: #07545b;
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
summary {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid rgba(237, 147, 47, 0.72);
  outline-offset: 3px;
  border-radius: 3px;
}

.skip-link {
  position: fixed;
  z-index: 300;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  color: var(--paper);
  background: var(--navy);
  border-radius: 8px;
  transform: translateY(-150%);
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.narrow {
  width: min(var(--reading), calc(100vw - 48px));
  margin-inline: auto;
}

.section {
  padding-block: clamp(72px, 7vw, 112px);
}

.section--compact {
  padding-block: clamp(52px, 5vw, 78px);
}

.section--mist {
  background: var(--mist);
}

.section--navy {
  color: #eaf7f6;
  background:
    radial-gradient(circle at 82% 15%, rgba(90, 210, 207, 0.14), transparent 32%),
    linear-gradient(145deg, var(--navy), #073447);
}

.section--navy h2,
.section--navy h3 {
  color: var(--paper);
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--teal-dark);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  line-height: 1.35;
  text-transform: uppercase;
}

.section--navy .eyebrow,
.hero .eyebrow {
  color: var(--aqua);
}

h1,
h2,
h3,
h4 {
  margin-top: 0;
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 700;
  letter-spacing: -0.032em;
  line-height: 1.08;
  text-wrap: balance;
}

h1 {
  margin-bottom: 24px;
  font-size: clamp(2rem, 3.2vw, 2.8rem);
}

h2 {
  margin-bottom: 22px;
  font-size: clamp(2rem, 3.1vw, 3rem);
}

h3 {
  margin-bottom: 14px;
  font-size: clamp(1.35rem, 1.8vw, 1.75rem);
}

h4 {
  margin-bottom: 10px;
  font-size: 1.16rem;
}

p {
  margin: 0 0 1.2em;
}

.lede {
  max-width: 760px;
  color: #d8eaea;
  font-size: clamp(1.1rem, 1.45vw, 1.28rem);
  line-height: 1.65;
}

.section-lede {
  max-width: 780px;
  margin-bottom: 42px;
  color: var(--muted);
  font-size: 1.08rem;
}

.section-heading {
  max-width: 880px;
  margin-bottom: clamp(34px, 4vw, 56px);
}

.section-heading p:last-child {
  margin-bottom: 0;
}

.kicker-line {
  width: 56px;
  height: 4px;
  margin-bottom: 24px;
  background: linear-gradient(90deg, var(--teal), var(--orange));
  border-radius: 99px;
}

.site-header {
  position: sticky;
  z-index: 120;
  top: 0;
  background: rgba(255, 255, 255, 0.97);
  border-top: 5px solid var(--navy);
  border-bottom: 1px solid rgba(207, 221, 220, 0.95);
  backdrop-filter: blur(12px);
}

.header-inner {
  min-height: 92px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  color: var(--ink);
  text-decoration: none;
}

.brand img {
  width: 286px;
  height: auto;
}

.desktop-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
}

.nav-link,
.nav-dropdown > summary {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  gap: 7px;
  padding: 11px 13px;
  color: var(--ink);
  border-radius: 8px;
  font-size: 0.94rem;
  font-weight: 760;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
}

.nav-link:hover,
.nav-dropdown > summary:hover,
.nav-link[aria-current="page"] {
  color: var(--teal-dark);
  background: var(--mist);
}

.nav-dropdown {
  position: relative;
}

.nav-dropdown > summary {
  cursor: pointer;
  list-style: none;
}

.nav-dropdown > summary::-webkit-details-marker {
  display: none;
}

.nav-dropdown > summary::after {
  width: 7px;
  height: 7px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  content: "";
  transform: rotate(45deg) translateY(-2px);
  transition: transform 140ms ease;
}

.nav-dropdown[open] > summary::after {
  transform: rotate(225deg) translate(-1px, -1px);
}

.nav-panel {
  position: absolute;
  z-index: 150;
  top: calc(100% + 12px);
  left: 50%;
  width: min(620px, calc(100vw - 40px));
  padding: 14px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  transform: translateX(-50%);
}

.nav-panel--small {
  width: 420px;
}

.nav-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.nav-panel a {
  display: block;
  padding: 13px 14px;
  color: var(--ink);
  border-radius: 9px;
  text-decoration: none;
}

.nav-panel a:hover {
  background: var(--mist);
}

.nav-panel strong,
.nav-panel span {
  display: block;
}

.nav-panel strong {
  font-size: 0.92rem;
  line-height: 1.35;
}

.nav-panel span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.45;
}

.nav-panel .nav-view-all {
  margin-top: 8px;
  color: var(--teal-dark);
  border-top: 1px solid var(--line);
  border-radius: 0 0 8px 8px;
  font-weight: 800;
}

.nav-cta {
  margin-left: 4px;
  color: var(--paper);
  background: var(--navy);
  border: 1px solid var(--navy);
}

.nav-cta:hover {
  color: var(--paper);
  background: var(--teal-dark);
}

.menu-button,
.mobile-nav {
  display: none;
}

.language-label {
  padding-inline: 8px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 760;
}

.hero {
  position: relative;
  overflow: hidden;
  color: var(--paper);
  background:
    linear-gradient(90deg, rgba(6, 43, 60, 0.98) 0%, rgba(6, 43, 60, 0.95) 46%, rgba(7, 52, 71, 0.76) 100%),
    var(--navy);
}

.hero::after {
  position: absolute;
  right: -9%;
  bottom: -60%;
  width: 44vw;
  height: 44vw;
  min-width: 520px;
  min-height: 520px;
  border: 1px solid rgba(90, 210, 207, 0.16);
  border-radius: 50%;
  content: "";
  box-shadow:
    0 0 0 72px rgba(90, 210, 207, 0.025),
    0 0 0 144px rgba(90, 210, 207, 0.018);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  min-height: 560px;
  padding-block: clamp(64px, 7vw, 100px);
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(420px, 1.05fr);
  align-items: center;
  gap: clamp(36px, 5vw, 72px);
}

.hero-inner--text {
  grid-template-columns: minmax(0, 980px);
}

.hero-copy {
  max-width: 780px;
}

.hero h1 {
  max-width: 980px;
  color: var(--paper);
}

.hero-visual {
  position: relative;
}

.hero-visual-frame {
  padding: 18px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: var(--radius);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.22);
}

.hero-visual-frame img {
  width: 100%;
}

.hero-visual-frame--icon img {
  width: min(260px, 72%);
  margin-inline: auto;
}

.hero-caption {
  margin: 12px 4px 0;
  color: #cae3e2;
  font-size: 0.78rem;
  line-height: 1.5;
}

.hero-actions,
.button-row {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button-row--center {
  justify-content: center;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 12px 20px;
  color: var(--paper);
  background: var(--teal-dark);
  border: 1px solid var(--teal-dark);
  border-radius: 8px;
  font-size: 0.94rem;
  font-weight: 800;
  line-height: 1.25;
  text-align: center;
  text-decoration: none;
  transition: transform 150ms ease, background 150ms ease, border-color 150ms ease;
}

.button:hover {
  color: var(--paper);
  background: #075b62;
  border-color: #075b62;
  transform: translateY(-1px);
}

.button--accent {
  color: var(--ink);
  background: var(--orange);
  border-color: var(--orange);
}

.button--accent:hover {
  color: var(--ink);
  background: #f2a64f;
  border-color: #f2a64f;
}

.button--light {
  color: var(--ink);
  background: var(--paper);
  border-color: var(--paper);
}

.button--light:hover {
  color: var(--ink);
  background: #eaf6f5;
  border-color: #eaf6f5;
}

.button--outline {
  color: var(--teal-dark);
  background: transparent;
  border-color: var(--teal-dark);
}

.button--outline:hover {
  color: var(--paper);
  background: var(--teal-dark);
}

.button--text {
  min-height: 0;
  padding: 0;
  color: var(--teal-dark);
  background: none;
  border: 0;
}

.button--text:hover {
  color: #07545b;
  background: none;
  transform: none;
}

.breadcrumb-wrap {
  color: #cfe3e2;
  background: var(--navy);
}

.breadcrumbs {
  min-height: 54px;
  display: flex;
  align-items: center;
  gap: 9px;
  overflow-x: auto;
  color: #cfe3e2;
  font-size: 0.82rem;
  white-space: nowrap;
}

.breadcrumbs ol {
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 9px;
  list-style: none;
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 9px;
}

.breadcrumbs li + li::before {
  color: #7196a0;
  content: "/";
}

.breadcrumbs a {
  color: #e5f5f4;
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--aqua);
}

.breadcrumbs [aria-current="page"] {
  color: var(--aqua);
  font-weight: 700;
}

.article-hero {
  color: var(--paper);
  background:
    radial-gradient(circle at 82% 20%, rgba(90, 210, 207, 0.13), transparent 30%),
    var(--navy);
}

.article-hero-inner {
  padding-block: clamp(62px, 7vw, 100px);
}

.article-hero h1 {
  max-width: 1000px;
  color: var(--paper);
  font-size: clamp(2.45rem, 4vw, 3.55rem);
}

.article-hero .lede {
  max-width: 820px;
}

.article-meta {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  color: #a9c9ca;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 10px;
  color: #765013;
  background: var(--orange-soft);
  border: 1px solid #efc98e;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.04em;
  line-height: 1.2;
  text-transform: uppercase;
}

.status-badge::before {
  width: 7px;
  height: 7px;
  background: var(--orange);
  border-radius: 50%;
  content: "";
}

.grid {
  display: grid;
  gap: 24px;
}

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

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

.grid--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(380px, 0.88fr);
  align-items: center;
  gap: clamp(42px, 7vw, 92px);
}

.split--reverse .split-copy {
  order: 2;
}

.split-copy > :last-child {
  margin-bottom: 0;
}

.card {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 3vw, 36px);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.card > :last-child {
  margin-bottom: 0;
}

.card--flat {
  box-shadow: none;
}

.card--navy {
  color: #dceeed;
  background: var(--navy);
  border-color: var(--navy);
}

.card--navy h3,
.card--navy h4 {
  color: var(--paper);
}

.card--navy a {
  color: var(--aqua);
}

.card-number {
  display: inline-grid;
  width: 38px;
  height: 38px;
  margin-bottom: 22px;
  place-items: center;
  color: var(--paper);
  background: var(--teal-dark);
  border-radius: 50%;
  font-size: 0.78rem;
  font-weight: 850;
}

.route-card {
  padding: 0;
}

.route-card-visual {
  display: grid;
  min-height: 270px;
  padding: 24px;
  place-items: center;
  background: var(--mist);
  border-bottom: 1px solid var(--line);
}

.route-card-visual img {
  width: 100%;
  max-height: 250px;
}

.route-card-copy {
  padding: clamp(26px, 3.4vw, 42px);
}

.route-label {
  margin: 0 0 12px;
  color: var(--teal-dark);
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.route-card ul,
.check-list,
.plain-list {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.route-card li,
.check-list li {
  position: relative;
  padding: 9px 0 9px 26px;
  border-top: 1px solid var(--line);
}

.route-card li::before,
.check-list li::before {
  position: absolute;
  top: 13px;
  left: 2px;
  width: 12px;
  height: 7px;
  border-bottom: 2px solid var(--teal-dark);
  border-left: 2px solid var(--teal-dark);
  content: "";
  transform: rotate(-45deg);
}

.visual-card {
  overflow: hidden;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.visual-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: contain;
  background: var(--mist);
}

.visual-card-copy {
  padding: 24px;
}

.visual-card-copy > :last-child {
  margin-bottom: 0;
}

.icon-card img {
  width: 86px;
  margin-bottom: 22px;
}

.decision-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  overflow: hidden;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.decision-step {
  position: relative;
  min-height: 226px;
  padding: 30px 26px;
}

.decision-step + .decision-step {
  border-left: 1px solid var(--line);
}

.decision-step strong {
  display: block;
  margin-bottom: 12px;
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.25rem;
  line-height: 1.2;
}

.decision-step p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.decision-step .card-number {
  margin-bottom: 18px;
}

.answer-box {
  margin-bottom: 46px;
  padding: clamp(28px, 4vw, 44px);
  background: #eef8f7;
  border: 1px solid #b8dedd;
  border-left: 6px solid var(--teal);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.answer-box h2 {
  font-size: clamp(1.5rem, 2.3vw, 2rem);
}

.answer-box > :last-child {
  margin-bottom: 0;
}

.callout {
  margin-block: 34px;
  padding: 24px 28px;
  background: var(--orange-soft);
  border: 1px solid #f0c887;
  border-radius: var(--radius-sm);
}

.callout--blue {
  background: #eef7fb;
  border-color: #c5dfe9;
}

.callout--dark {
  color: #dceeed;
  background: var(--navy);
  border-color: var(--navy);
}

.callout--dark h3 {
  color: var(--paper);
}

.callout > :last-child {
  margin-bottom: 0;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, var(--reading)) 260px;
  align-items: start;
  justify-content: center;
  gap: clamp(52px, 7vw, 92px);
}

.article-body {
  width: 100%;
  min-width: 0;
}

.article-body h2 {
  margin-top: 2.2em;
  scroll-margin-top: 120px;
}

.article-body h3 {
  margin-top: 1.8em;
}

.article-body h2:first-child {
  margin-top: 0;
}

.article-body p,
.article-body li {
  color: #234653;
}

.article-body a {
  overflow-wrap: anywhere;
}

.article-body figure {
  margin-block: 38px;
  overflow: hidden;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.article-body figure img {
  width: 100%;
  padding: 14px;
  background: var(--paper);
}

figcaption {
  padding: 14px 18px 16px;
  color: var(--muted);
  background: var(--mist);
  border-top: 1px solid var(--line);
  font-size: 0.8rem;
  line-height: 1.5;
}

.article-aside {
  position: sticky;
  top: 120px;
  padding: 24px;
  background: var(--mist);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.article-aside h2 {
  margin-bottom: 14px;
  font-family: inherit;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.article-aside ol {
  margin: 0;
  padding-left: 20px;
}

.article-aside li {
  margin: 8px 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.45;
}

.article-aside a {
  color: var(--ink-2);
  text-decoration: none;
}

.formula {
  margin-block: 30px;
  padding: 24px;
  overflow-x: auto;
  color: var(--paper);
  background: var(--navy);
  border-radius: var(--radius-sm);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: clamp(0.86rem, 1.5vw, 1rem);
  line-height: 1.7;
}

.formula span {
  display: block;
  margin-top: 8px;
  color: #b8d8d8;
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
  font-size: 0.76rem;
}

.table-wrap {
  margin-block: 30px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--paper);
  font-size: 0.88rem;
}

caption {
  padding: 15px 18px;
  color: var(--ink);
  background: var(--mist);
  border-bottom: 1px solid var(--line);
  font-weight: 800;
  text-align: left;
}

th,
td {
  min-width: 138px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--ink);
  background: #f8fbfb;
  font-size: 0.78rem;
  letter-spacing: 0.03em;
}

tr:last-child td {
  border-bottom: 0;
}

.spec-table td:nth-child(1) {
  width: 25%;
  color: var(--ink);
  font-weight: 760;
}

.source-list {
  margin-top: 42px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}

.source-list h2 {
  margin-top: 0;
  font-size: 1.65rem;
}

.source-list ol {
  padding-left: 22px;
}

.source-list li {
  margin: 12px 0;
  font-size: 0.86rem;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.related-link {
  min-height: 165px;
  padding: 22px;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.related-link:hover {
  color: var(--ink);
  border-color: var(--teal);
  box-shadow: var(--shadow-soft);
}

.related-link span {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.5;
}

.product-facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.product-fact {
  min-height: 150px;
  padding: 26px 22px;
}

.product-fact + .product-fact {
  border-left: 1px solid var(--line);
}

.product-fact small,
.product-fact strong {
  display: block;
}

.product-fact small {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.product-fact strong {
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.25rem;
  line-height: 1.28;
}

.product-fact span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.45;
}

.state-key {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 22px 0 0;
}

.state-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 0.79rem;
}

.state-dot {
  width: 9px;
  height: 9px;
  background: var(--orange);
  border-radius: 50%;
}

.gas-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.gas-card {
  padding: 24px;
  text-align: center;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.gas-card img {
  width: 92px;
  margin: 0 auto 14px;
}

.gas-card strong,
.gas-card span {
  display: block;
}

.gas-card span {
  margin-top: 5px;
  color: var(--muted);
  font-size: 0.78rem;
}

.assessment-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.form-section {
  grid-column: 1 / -1;
  margin-top: 22px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}

.form-section:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.form-section h2 {
  margin-bottom: 10px;
  font-size: 1.8rem;
}

.form-section p {
  color: var(--muted);
  font-size: 0.9rem;
}

.field {
  min-width: 0;
}

.field--full {
  grid-column: 1 / -1;
}

.field label,
.field legend {
  display: block;
  margin-bottom: 8px;
  color: var(--ink);
  font-size: 0.86rem;
  font-weight: 790;
}

.field small {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.74rem;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  min-height: 48px;
  padding: 11px 13px;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid #abc2c2;
  border-radius: 7px;
}

.field textarea {
  min-height: 132px;
  resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--teal-dark);
  box-shadow: 0 0 0 3px rgba(23, 169, 170, 0.14);
  outline: none;
}

.choice-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.choice-card {
  position: relative;
  min-height: 130px;
  cursor: pointer;
}

.choice-card input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.choice-card span {
  height: 100%;
  padding: 18px;
  display: block;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.choice-card strong,
.choice-card small {
  display: block;
}

.choice-card strong {
  color: var(--ink);
  font-size: 0.9rem;
  line-height: 1.4;
}

.choice-card small {
  margin-top: 7px;
  color: var(--muted);
  font-size: 0.74rem;
  line-height: 1.45;
}

.choice-card input:checked + span {
  background: #edf9f8;
  border-color: var(--teal-dark);
  box-shadow: inset 0 0 0 1px var(--teal-dark);
}

.choice-card input:focus-visible + span {
  outline: 3px solid rgba(237, 147, 47, 0.72);
  outline-offset: 3px;
}

.conditional-fields[hidden] {
  display: none;
}

.privacy-check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.privacy-check input {
  width: 18px;
  min-height: 18px;
  margin-top: 4px;
}

.honeypot {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
  clip: rect(0 0 0 0) !important;
  clip-path: inset(50%) !important;
  white-space: nowrap !important;
}

.form-note {
  padding: 18px 20px;
  color: var(--muted);
  background: var(--mist);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
}

.legal-identity {
  margin-top: 60px;
  padding: 24px 28px;
  color: var(--muted);
  background: var(--mist);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
}

.legal-identity strong {
  color: var(--ink);
}

.cta-band {
  position: relative;
  overflow: hidden;
  padding-block: clamp(54px, 6vw, 84px);
  color: #dceeed;
  background: var(--navy);
}

.cta-band::after {
  position: absolute;
  right: 5%;
  bottom: -100px;
  width: 320px;
  height: 320px;
  border: 1px solid rgba(90, 210, 207, 0.18);
  border-radius: 50%;
  content: "";
}

.cta-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.cta-copy {
  max-width: 760px;
}

.cta-copy h2 {
  color: var(--paper);
}

.cta-copy p:last-child {
  margin-bottom: 0;
}

.site-footer {
  color: #b8d0d1;
  background: #041f2d;
}

.footer-main {
  padding-block: 62px 48px;
  display: grid;
  grid-template-columns: minmax(250px, 1.3fr) repeat(3, minmax(150px, 0.7fr));
  gap: 44px;
}

.footer-brand img {
  width: 252px;
  margin-bottom: 20px;
}

.footer-brand p {
  max-width: 390px;
  font-size: 0.86rem;
}

.footer-col h2 {
  margin-bottom: 16px;
  color: var(--paper);
  font-family: inherit;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.footer-col ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-col li {
  margin: 8px 0;
}

.footer-col a {
  color: #c7dcdc;
  font-size: 0.84rem;
  text-decoration: none;
}

.footer-col a:hover {
  color: var(--aqua);
}

.footer-legal {
  padding-block: 24px 34px;
  border-top: 1px solid rgba(207, 221, 220, 0.13);
  font-size: 0.72rem;
  line-height: 1.6;
}

.footer-legal-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 26px;
}

.footer-legal p {
  margin: 0;
}

.footer-legal a {
  color: #c7dcdc;
}

.not-found {
  min-height: 70vh;
  display: grid;
  place-items: center;
  text-align: center;
}

.not-found-inner {
  max-width: 700px;
}

.not-found-code {
  color: var(--teal-dark);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(5rem, 16vw, 10rem);
  font-weight: 700;
  letter-spacing: -0.08em;
  line-height: 0.8;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 1180px) {
  .brand img {
    width: 240px;
  }

  .desktop-nav {
    gap: 2px;
  }

  .nav-link,
  .nav-dropdown > summary {
    padding-inline: 9px;
    font-size: 0.88rem;
  }

  .language-label {
    display: none;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1fr);
  }
}

@media (max-width: 1020px) {
  :root {
    --shell: min(100% - 36px, 940px);
  }

  .desktop-nav {
    display: none;
  }

  .menu-button {
    width: 48px;
    height: 48px;
    padding: 0;
    display: inline-grid;
    place-items: center;
    color: var(--ink);
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 8px;
    cursor: pointer;
  }

  .menu-button span,
  .menu-button::before,
  .menu-button::after {
    width: 22px;
    height: 2px;
    grid-column: 1;
    grid-row: 1;
    background: currentColor;
    border-radius: 99px;
    content: "";
    transition: transform 180ms ease, opacity 180ms ease;
  }

  .menu-button::before {
    transform: translateY(-7px);
  }

  .menu-button::after {
    transform: translateY(7px);
  }

  .menu-button[aria-expanded="true"] span {
    opacity: 0;
  }

  .menu-button[aria-expanded="true"]::before {
    transform: rotate(45deg);
  }

  .menu-button[aria-expanded="true"]::after {
    transform: rotate(-45deg);
  }

  .mobile-nav {
    position: fixed;
    z-index: 119;
    inset: 97px 0 0;
    padding: 18px;
    overflow-y: auto;
    color: var(--ink);
    background: rgba(255, 255, 255, 0.995);
  }

  .mobile-nav.is-open {
    display: block;
  }

  .mobile-nav-inner {
    width: min(680px, 100%);
    margin: 0 auto;
  }

  .mobile-nav > .mobile-nav-inner > a,
  .mobile-nav summary {
    width: 100%;
    min-height: 54px;
    padding: 14px 4px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--ink);
    border-bottom: 1px solid var(--line);
    font-weight: 800;
    text-decoration: none;
    cursor: pointer;
    list-style: none;
  }

  .mobile-nav summary::-webkit-details-marker {
    display: none;
  }

  .mobile-nav summary::after {
    content: "+";
    font-size: 1.3rem;
    font-weight: 400;
  }

  .mobile-nav details[open] summary::after {
    content: "−";
  }

  .mobile-nav-sub {
    padding: 8px 0 16px 18px;
    border-bottom: 1px solid var(--line);
  }

  .mobile-nav-sub a {
    display: block;
    padding: 10px 4px;
    color: var(--ink-2);
    text-decoration: none;
  }

  .mobile-cta {
    margin-top: 20px;
    width: 100%;
  }

  .hero-inner {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    max-width: 720px;
  }

  .split,
  .split--reverse {
    grid-template-columns: 1fr;
  }

  .split--reverse .split-copy {
    order: initial;
  }

  .grid--4,
  .gas-grid,
  .product-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .product-fact + .product-fact {
    border-left: 0;
  }

  .product-fact:nth-child(even) {
    border-left: 1px solid var(--line);
  }

  .product-fact:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }

  .decision-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .decision-step + .decision-step {
    border-left: 0;
  }

  .decision-step:nth-child(even) {
    border-left: 1px solid var(--line);
  }

  .decision-step:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }

  .article-layout {
    grid-template-columns: minmax(0, var(--reading));
  }

  .article-aside {
    display: none;
  }

  .footer-main {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  :root {
    --shell: min(100% - 28px, 680px);
  }

  body {
    font-size: 16px;
  }

  h1 {
    font-size: clamp(2.18rem, 10vw, 3rem);
  }

  h2 {
    font-size: clamp(1.8rem, 8vw, 2.4rem);
  }

  .site-header {
    border-top-width: 4px;
  }

  .header-inner {
    min-height: 76px;
  }

  .brand img {
    width: 205px;
  }

  .mobile-nav {
    inset-block-start: 80px;
  }

  .hero-inner {
    min-height: auto;
    padding-block: 62px 70px;
  }

  .hero h1,
  .article-hero h1 {
    font-size: clamp(1.9rem, 9vw, 2.5rem);
  }

  .hero-visual-frame {
    padding: 10px;
  }

  .section {
    padding-block: 66px;
  }

  .section--compact {
    padding-block: 48px;
  }

  .grid--2,
  .grid--3,
  .grid--4,
  .gas-grid,
  .related-grid,
  .assessment-form,
  .choice-grid,
  .product-facts,
  .decision-strip {
    grid-template-columns: 1fr;
  }

  .decision-step + .decision-step,
  .decision-step:nth-child(even),
  .product-fact + .product-fact,
  .product-fact:nth-child(even) {
    border-left: 0;
  }

  .decision-step:nth-child(n + 2),
  .product-fact:nth-child(n + 2) {
    border-top: 1px solid var(--line);
  }

  .decision-step {
    min-height: 0;
  }

  .field,
  .field--full {
    grid-column: 1;
  }

  .article-hero-inner {
    padding-block: 54px 68px;
  }

  .article-meta {
    gap: 8px 14px;
  }

  .answer-box {
    border-left-width: 4px;
  }

  .cta-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .footer-brand img {
    width: 230px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}