:root {
  color-scheme: light;

  --arctic-deep: #071219;
  --arctic-surface: #0b1820;
  --frost: #f6f8fa;
  --snow: #fff;
  --cyan: #02cfe7;
  --teal: #2d6b7a;
  --green: #11c098;
  --text: #101418;
  --muted: #3a4a55;
  --border: #cbd7df;
  --ink: var(--text);
  --dark: var(--arctic-surface);
  --dark-deep: var(--arctic-deep);
  --paper: var(--frost);
  --ice: var(--border);
  --accent: var(--teal);
  --accent-strong: #1b4e5a;
  --aurora-cyan: var(--cyan);
  --aurora-green: var(--green);
  --focus: #0d7185;
  --font-display: georgia, "Times New Roman", serif;
  --font-ui: system-ui, -apple-system, blinkmacsystemfont, "Segoe UI", sans-serif;
  --container: 80rem;
  --reading: 45rem;
  --narrow: 35rem;
  --gutter: 1rem;
  --section-space: 3rem;
  --rule: 1px solid var(--border);
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: 1rem;
  line-height: 1.625;
  text-rendering: optimizelegibility;
}

body.nav-open {
  overflow: hidden;
}

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

a {
  color: var(--accent-strong);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--accent);
}

button,
input,
textarea {
  font: inherit;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

h1,
h2,
h3,
p,
ul,
ol,
figure {
  margin-top: 0;
}

h1,
h2,
h3 {
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: -0.025em;
}

h1 {
  max-width: 15ch;
  margin-bottom: 1.5rem;
  font-size: clamp(2.5rem, 5vw, 4rem);
  line-height: 1.06;
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  line-height: 1.16;
}

h3 {
  margin-bottom: 0.75rem;
  font-size: clamp(1.35rem, 2vw, 1.6rem);
  line-height: 1.25;
}

p:last-child,
ul:last-child,
ol:last-child {
  margin-bottom: 0;
}

.container {
  width: min(100% - (2 * var(--gutter)), var(--container));
  margin-inline: auto;
}

.reading-width {
  max-width: var(--reading);
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.7rem 1rem;
  transform: translateY(-160%);
  border-radius: var(--radius-sm);
  background: var(--snow);
  color: var(--ink);
  font-weight: 700;
}

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

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  border-bottom: var(--rule);
  background: color-mix(in srgb, var(--paper) 96%, transparent);
  backdrop-filter: blur(12px);
}

.site-header__inner {
  display: flex;
  min-height: 4rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  gap: 0.5rem;
  color: var(--ink);
  font-weight: 750;
  text-decoration: none;
}

.brand:hover {
  color: var(--ink);
}

.brand__logo {
  width: 2.5rem;
  height: 2.5rem;
  filter: brightness(0.78);
  transform: scale(1.2);
}

.brand__name {
  display: inline-flex;
  align-items: baseline;
  gap: 0.28rem;
  font-size: 0.96rem;
  letter-spacing: -0.01em;
  line-height: 1.15;
}

.brand__suffix {
  color: var(--muted);
  font-size: 0.78em;
  font-weight: 700;
}

.nav-toggle {
  display: none;
  min-width: 2.75rem;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ice);
  border-radius: var(--radius-sm);
  background: var(--snow);
  color: var(--ink);
  cursor: pointer;
  font-weight: 700;
}

.nav-panel {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.top-nav,
.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.top-nav a,
.lang-switch a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  padding: 0 0.75rem;
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 650;
  text-decoration: none;
}

.top-nav a:hover,
.top-nav a[aria-current="page"],
.top-nav a[aria-current="location"],
.lang-switch a:hover,
.lang-switch a[aria-current="true"] {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 0.4rem;
}

.lang-switch {
  padding-left: 1rem;
  border-left: 1px solid var(--ice);
}

.lang-switch span {
  color: var(--ice);
}

.page-main {
  min-height: 60vh;
}

.home-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 3rem 0;
  background-color: var(--dark-deep);
  background-image:
    radial-gradient(ellipse at 82% 36%, rgb(2 207 231 / 18%), transparent 32%),
    radial-gradient(ellipse at 102% 72%, rgb(17 192 152 / 10%), transparent 34%),
    linear-gradient(102deg, var(--dark-deep) 0%, var(--dark-deep) 42%, var(--dark) 68%, #0b2d33 100%);
  color: var(--snow);
}

.home-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 1.5rem;
}

.home-hero h1,
.home-hero a,
.dark-band h2,
.dark-band h3,
.dark-band a {
  color: var(--snow);
}

.home-hero__lead {
  max-width: 42rem;
  color: #dbe5e9;
  font-size: clamp(1.1rem, 2vw, 1.25rem);
  line-height: 1.55;
}

.home-hero__mark {
  position: relative;
  display: grid;
  min-height: 9rem;
  margin: 0;
  isolation: isolate;
  place-items: center;
}

.kide-field::before,
.kide-field::after {
  position: absolute;
  z-index: -1;
  top: 50%;
  left: 50%;
  content: "";
  pointer-events: none;
}

.kide-field::before {
  width: min(172%, 40rem);
  height: min(130%, 27rem);
  background:
    radial-gradient(ellipse at 42% 48%, rgb(2 207 231 / 20%), transparent 28%),
    radial-gradient(ellipse at 68% 34%, rgb(45 107 122 / 16%), transparent 34%),
    radial-gradient(ellipse at 78% 74%, rgb(17 192 152 / 12%), transparent 32%);
  filter: blur(5px);
  opacity: 0.9;
  transform: translate(-39%, -52%) rotate(-7deg);
  animation: arctic-field-drift 28s ease-in-out infinite alternate;
  /* stylelint-disable-next-line property-no-vendor-prefix -- Safari mask fallback. */
  -webkit-mask-image: radial-gradient(ellipse at 56% 50%, #000 18%, transparent 72%);
  mask-image: radial-gradient(ellipse at 56% 50%, #000 18%, transparent 72%);
  will-change: transform;
}

.kide-field::after {
  width: min(148%, 33rem);
  height: min(108%, 23rem);
  background-image:
    linear-gradient(90deg, transparent 5%, rgb(132 217 223 / 28%) 48%, transparent 94%),
    linear-gradient(0deg, transparent 8%, rgb(132 217 223 / 22%) 52%, transparent 92%);
  background-position: center 54%, 61% center;
  background-repeat: no-repeat;
  background-size: 100% 1px, 1px 100%;
  opacity: 0.24;
  transform: translate(-38%, -50%);
  /* stylelint-disable-next-line property-no-vendor-prefix -- Safari mask fallback. */
  -webkit-mask-image: radial-gradient(ellipse at 58% 50%, #000 10%, transparent 68%);
  mask-image: radial-gradient(ellipse at 58% 50%, #000 10%, transparent 68%);
}

.home-hero__mark img {
  position: relative;
  width: min(62%, 15.5rem);
  filter: drop-shadow(0 0 1.75rem rgb(2 207 231 / 10%));
}

@keyframes arctic-field-drift {
  from {
    transform: translate(-39%, -52%) rotate(-7deg);
  }

  to {
    transform: translate(-37.5%, -53%) rotate(-6.5deg);
  }
}

.eyebrow {
  margin-bottom: 1rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.home-hero .eyebrow,
.dark-band .eyebrow {
  color: #9ac2cb;
}

.hero-actions {
  display: flex;
  margin-top: 2rem;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem 1.25rem;
}

.btn {
  display: inline-flex;
  min-height: 3rem;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.25rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 750;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease;
}

.btn--primary {
  border-color: var(--accent-strong);
  background: var(--accent-strong);
  color: var(--snow);
}

.btn--primary:hover {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--snow);
}

.home-hero .btn--primary {
  border-color: var(--snow);
  background: var(--snow);
  color: var(--dark);
}

.home-hero .btn--primary:hover {
  border-color: #dbe5e9;
  background: #dbe5e9;
  color: var(--dark);
}

.text-link {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  font-weight: 700;
}

.section {
  padding-block: var(--section-space);
  scroll-margin-top: 6rem;
}

.section + .section {
  border-top: var(--rule);
}

.section--deep {
  position: relative;
  isolation: isolate;
  border-color: transparent;
  background-color: var(--dark);
  background-image:
    radial-gradient(ellipse at 88% 12%, rgb(2 207 231 / 10%), transparent 27%),
    radial-gradient(ellipse at 72% 100%, rgb(17 192 152 / 8%), transparent 32%),
    linear-gradient(120deg, var(--dark-deep), var(--dark));
  box-shadow: 0 0 0 100vmax var(--dark);
  clip-path: inset(0 -100vmax);
  color: #dbe5e9;
}

.section--deep h2,
.section--deep h3,
.section--deep a {
  color: var(--snow);
}

.section--deep .eyebrow {
  color: #84d9df;
}

.section--deep .section-heading > p,
.section--deep .signal-path p,
.section--deep .evidence-chain p,
.section--deep .principle-list p,
.section--deep .mapping-list p {
  color: #c7d5db;
}

.section--deep .signal-path,
.section--deep .evidence-chain,
.section--deep .signal-path li,
.section--deep .evidence-chain li {
  border-color: rgb(199 211 220 / 28%);
}

.section--deep .mapping-list li,
.section--deep .principle-list li,
.section--deep .card {
  border-color: rgb(199 211 220 / 28%);
  background: rgb(255 255 255 / 4%);
}

.section--deep .mapping-list strong {
  color: #84d9df;
}

.section-heading {
  display: grid;
  margin-bottom: 2.5rem;
  gap: 1rem;
}

.section-heading > p {
  max-width: 42rem;
  color: var(--muted);
  font-size: 1.08rem;
}

.signal-path,
.evidence-chain,
.principle-list,
.mapping-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.signal-path {
  position: relative;
  display: grid;
  gap: 0;
}

.signal-path::before {
  position: absolute;
  top: 0.4rem;
  bottom: 0.4rem;
  left: 0.31rem;
  width: 1px;
  background: linear-gradient(var(--cyan), var(--teal) 56%, var(--green));
  content: "";
  opacity: 0.7;
}

.signal-path li {
  position: relative;
  min-width: 0;
  padding: 0 0 2rem 3rem;

  --stage-color: var(--cyan);
}

.signal-path li:nth-child(2) {
  --stage-color: color-mix(in srgb, var(--cyan) 52%, var(--teal));
}

.signal-path li:nth-child(3) {
  --stage-color: color-mix(in srgb, var(--teal) 72%, var(--green));
}

.signal-path li:nth-child(4) {
  --stage-color: var(--green);
}

.signal-path li:last-child {
  padding-bottom: 0;
}

.signal-path__marker {
  position: relative;
  display: flex;
  margin: 0 0 0.5rem -3rem;
  align-items: center;
  gap: 0.75rem;
}

.signal-path__node {
  display: block;
  width: 0.625rem;
  height: 0.625rem;
  flex: 0 0 auto;
  border: 1px solid var(--stage-color);
  border-radius: 1px;
  background: var(--dark);
  box-shadow: 0 0 0 0.22rem color-mix(in srgb, var(--stage-color) 10%, transparent);
  transform: rotate(45deg);
}

.signal-path li::after {
  position: absolute;
  top: 1.05rem;
  left: 0.06rem;
  width: 0.65rem;
  height: 0.45rem;
  background: repeating-linear-gradient(0deg, var(--stage-color) 0 1px, transparent 1px 0.22rem);
  content: "";
  opacity: 0.32;
}

.signal-path__number,
.evidence-chain__number,
.evidence-chain__label {
  font-family: ui-monospace, "Cascadia Mono", "Segoe UI Mono", Consolas, monospace;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.signal-path__number {
  color: var(--stage-color);
}

.signal-path__label {
  display: none;
}

.process-list {
  display: grid;
  margin: 0;
  padding: 0;
  gap: 1.5rem;
  list-style: none;
}

.process-list li {
  display: grid;
  min-width: 0;
  grid-template-columns: 2rem minmax(0, 1fr);
  align-items: baseline;
  column-gap: 0.5rem;
}

.process-list__number {
  color: var(--accent-strong);
  font-family: ui-monospace, "Cascadia Mono", "Segoe UI Mono", Consolas, monospace;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.process-list h3 {
  margin: 0;
}

.process-list h3::before {
  content: "— ";
}

.process-list p {
  grid-column: 2;
  margin-top: 0.35rem;
}

.signal-path h3,
.evidence-chain h2 {
  margin-bottom: 0.5rem;
}

.signal-path p,
.evidence-chain p,
.principle-list p,
.mapping-list p {
  color: var(--muted);
}

.editorial-grid,
.trust-grid,
.contact-grid,
.legal-grid {
  display: grid;
  gap: 2rem;
}

.editorial-item {
  padding-top: 1.25rem;
  border-top: 3px solid var(--ink);
}

.evidence-chain {
  position: relative;
  display: grid;
  gap: 0;
}

.evidence-chain--compact {
  margin-top: 2rem;
}

.evidence-chain--compact::before,
.evidence-chain--full::before {
  position: absolute;
  top: 0.42rem;
  bottom: 0.42rem;
  left: 0.31rem;
  width: 1px;
  background: linear-gradient(var(--cyan), var(--teal) 52%, var(--green));
  content: "";
  opacity: 0.65;
}

.evidence-chain--compact li,
.evidence-chain--full li {
  position: relative;

  --stage-color: var(--cyan);
}

.evidence-chain li:nth-child(2) {
  --stage-color: color-mix(in srgb, var(--cyan) 62%, var(--teal));
}

.evidence-chain li:nth-child(3) {
  --stage-color: var(--teal);
}

.evidence-chain li:nth-child(4) {
  --stage-color: color-mix(in srgb, var(--teal) 58%, var(--green));
}

.evidence-chain li:nth-child(5) {
  --stage-color: var(--green);
}

.evidence-chain--compact li {
  display: grid;
  min-height: 3.75rem;
  padding: 0 0 1.5rem 3rem;
  align-content: start;
  gap: 0.2rem;
}

.evidence-chain--compact li::before,
.evidence-chain--full li::before {
  position: absolute;
  top: 0.08rem;
  left: 0;
  width: 0.625rem;
  height: 0.625rem;
  border: 1px solid var(--stage-color);
  border-radius: 1px;
  background: var(--paper);
  box-shadow: 0 0 0 0.22rem color-mix(in srgb, var(--stage-color) 10%, transparent);
  content: "";
  transform: rotate(45deg);
}

.evidence-chain--compact li::after,
.evidence-chain--full li::after {
  position: absolute;
  top: 0.1rem;
  left: 1.05rem;
  width: 1.15rem;
  height: 0.35rem;
  background: repeating-linear-gradient(90deg, var(--stage-color) 0 1px, transparent 1px 0.28rem);
  content: "";
  opacity: 0.34;
}

.evidence-chain--compact li:last-child {
  min-height: 0;
  padding-bottom: 0;
}

.evidence-chain--compact strong {
  color: var(--ink);
  line-height: 1.35;
}

.evidence-chain__number,
.evidence-chain__label {
  color: var(--stage-color);
}

.method-crosslink {
  margin-top: 1.5rem;
}

.dark-band {
  margin-block: 0;
  padding: 3rem 0;
  background-color: var(--dark);
  background-image:
    radial-gradient(ellipse at 12% 10%, rgb(2 207 231 / 10%), transparent 28%),
    linear-gradient(115deg, var(--dark-deep), var(--dark) 68%, #0b232b);
  color: #dbe5e9;
}

.dark-band__inner {
  display: grid;
  gap: 2rem;
}

.section--verified {
  position: relative;
  border-top: 1px solid var(--border);
  background: var(--snow);
  box-shadow: 0 0 0 100vmax var(--snow);
  clip-path: inset(0 -100vmax);
}

.page-hero + .section,
.section--deep + .section {
  border-top-color: transparent;
  background-image: linear-gradient(180deg, color-mix(in srgb, var(--cyan) 3%, var(--frost)) 0, var(--frost) 3rem);
}

.dark-band + .section--verified {
  background-image: linear-gradient(180deg, color-mix(in srgb, var(--cyan) 2%, var(--snow)) 0, var(--snow) 3rem);
}

.verified-heading {
  display: flex;
  margin-bottom: 2.5rem;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
}

.verified-heading__mark {
  width: 3.5rem;
  height: 3.5rem;
  flex: 0 0 auto;
  opacity: 0.72;
}

.trust-grid {
  border-top: 1px solid var(--ice);
}

.trust-item {
  padding-top: 1.25rem;
  border-top: 1px solid transparent;
}

.trust-item dt {
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.trust-item dd {
  margin: 0.3rem 0 0;
  color: var(--ink);
  font-weight: 700;
}

.trust-item__detail {
  display: block;
  margin-top: 0.15rem;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 500;
}

.association-official .trust-grid {
  gap: 1.25rem;
}

.association-membership {
  padding-block: 2.5rem;
}

.association-membership .callout h2 {
  font-size: clamp(1.35rem, 4vw, 1.75rem);
}

.page-hero {
  position: relative;
  isolation: isolate;
  display: grid;
  padding: 3.75rem 0 3rem;
  gap: 2rem;
  background-color: var(--dark-deep);
  background-image:
    radial-gradient(ellipse at 82% 10%, rgb(2 207 231 / 13%), transparent 31%),
    radial-gradient(ellipse at 98% 88%, rgb(17 192 152 / 9%), transparent 28%),
    linear-gradient(130deg, var(--dark-deep), var(--dark) 64%, #0b242d);
  box-shadow: 0 0 0 100vmax var(--dark-deep);
  clip-path: inset(0 -100vmax);
  color: #dbe5e9;
}

.page-hero h1 {
  color: var(--snow);
}

.page-hero .eyebrow {
  color: #84d9df;
}

.page-hero .page-hero__lead {
  color: #c7d5db;
}

.page-hero__content {
  max-width: var(--reading);
}

.page-hero__lead,
.section__hint,
.page-note {
  max-width: 44rem;
  color: var(--muted);
  font-size: 1.08rem;
}

.evidence-chain--full li {
  display: grid;
  padding: 0 0 2.5rem 3rem;
  gap: 1rem;
}

.evidence-chain--full li:last-child {
  padding-bottom: 0;
}

.evidence-chain__label {
  display: block;
  line-height: 1.45;
}

.principle-list,
.mapping-list {
  display: grid;
  gap: 1rem;
}

.principle-list li,
.mapping-list li,
.card {
  padding: 1.25rem;
  border: 1px solid var(--ice);
  border-radius: var(--radius-md);
  background: var(--snow);
}

.mapping-list strong {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--accent-strong);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
}

.callout {
  max-width: var(--reading);
  padding-left: 1.5rem;
  border-left: 4px solid var(--accent);
}

.callout p {
  color: var(--muted);
  font-size: 1.08rem;
}

.contact-grid {
  align-items: start;
}

.contact-details,
.contact-form-card {
  min-width: 0;
  padding: 1.5rem;
  border: 1px solid var(--ice);
  border-radius: var(--radius-md);
  background: var(--snow);
}

.info-list {
  display: grid;
  margin: 0;
  padding: 0;
  gap: 0.55rem;
  list-style: none;
}

.contact-form {
  display: grid;
  gap: 0.75rem;
}

.contact-form__label {
  margin-top: 0.5rem;
  color: var(--ink);
  font-weight: 750;
}

.contact-form__field {
  width: 100%;
  min-height: 3rem;
  padding: 0.7rem 0.85rem;
  border: 1px solid #93a3ac;
  border-radius: var(--radius-sm);
  background: var(--snow);
  color: var(--ink);
}

.contact-form__field--message {
  min-height: 10rem;
  resize: vertical;
}

.contact-form__field:focus {
  border-color: var(--focus);
}

.contact-form__honeypot {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  /* stylelint-disable-next-line property-no-deprecated -- Legacy hidden-field fallback. */
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  border: 0;
  white-space: nowrap;
}

.contact-form__honeypot label,
.contact-form__honeypot input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  border: 0;
}

.contact-form__consent {
  display: grid;
  margin-top: 0.75rem;
  align-items: start;
  grid-template-columns: 1.5rem 1fr;
  gap: 0.75rem;
}

.contact-form__consent input {
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.2rem;
}

.contact-form__turnstile {
  width: 100%;
  min-width: 0;
  min-height: 4.1rem;
  margin-top: 0.5rem;
  overflow: hidden;
}

.contact-form__turnstile .cf-turnstile,
.contact-form__turnstile .cf-turnstile > div,
.contact-form__turnstile iframe {
  width: 100% !important;
  max-width: 100%;
}

.contact-form__actions {
  margin-top: 0.5rem;
}

.contact-form__status {
  min-height: 1.625rem;
  margin: 0.25rem 0 0;
  color: var(--accent-strong);
  font-weight: 700;
}

.contact-form__status.is-error {
  color: #9c2f25;
}

.legal-content {
  max-width: var(--reading);
}

.legal-content .card {
  margin-bottom: 1.5rem;
}

.site-footer {
  margin-top: 0;
  padding: 3rem 0;
  background: var(--dark);
  color: #dbe5e9;
}

.site-footer a {
  color: var(--snow);
}

.site-footer__grid {
  display: grid;
  gap: 2rem;
}

.site-footer__identity {
  max-width: 28rem;
}

.site-footer__identity > p {
  padding-left: 3.5rem;
}

.site-footer__brand {
  display: flex;
  margin-bottom: 0.75rem;
  align-items: center;
  gap: 0.75rem;
}

.site-footer__mark {
  width: 2.75rem;
  height: 2.75rem;
  flex: 0 0 auto;
}

.site-footer__name {
  margin: 0;
  color: var(--snow);
  font-family: var(--font-display);
  font-size: 1.5rem;
}

.site-footer__label {
  margin-bottom: 0.35rem;
  color: #9ac2cb;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.site-footer__nav {
  display: grid;
  align-content: start;
  gap: 0.45rem;
}

.site-footer__legal {
  padding-top: 1.5rem;
  border-top: 1px solid color-mix(in srgb, var(--ice) 25%, transparent);
  color: #b9c7ce;
  font-size: 0.88rem;
}

.error-page {
  display: flex;
  min-height: calc(100vh - 4rem);
  flex-direction: column;
}

.error-main {
  position: relative;
  isolation: isolate;
  display: grid;
  flex: 1;
  place-items: center;
  padding-block: 5rem;
  background-color: var(--dark-deep);
  background-image:
    radial-gradient(ellipse at 78% 16%, rgb(2 207 231 / 16%), transparent 33%),
    radial-gradient(ellipse at 98% 74%, rgb(17 192 152 / 11%), transparent 30%),
    linear-gradient(135deg, var(--dark-deep), var(--dark));
  box-shadow: 0 0 0 100vmax var(--dark-deep);
  clip-path: inset(0 -100vmax);
  color: #dbe5e9;
}

.error-content {
  max-width: 38rem;
}

.error-code {
  margin-bottom: 0.5rem;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.15em;
}

.error-main h1,
.error-main a {
  color: var(--snow);
}

.error-main .page-hero__lead,
.error-main .page-note {
  color: #c7d5db;
}

@media (width >= 23.4375rem) {
  :root {
    --gutter: 1.25rem;
  }
}

/* stylelint-disable-next-line media-feature-range-notation -- Contracted breakpoint syntax. */
@media (min-width: 48rem) {
  :root {
    --gutter: 2rem;
  }

  .home-hero {
    padding-block: 5rem;
  }

  .section-heading {
    grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.75fr);
    align-items: start;
  }

  .section-heading > p {
    padding-top: 2.25rem;
  }

  .editorial-grid,
  .trust-grid,
  .principle-list,
  .mapping-list,
  .legal-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .evidence-chain--full li {
    grid-template-columns: 10rem minmax(0, 1fr);
    gap: 2rem;
  }

  .dark-band__inner,
  .contact-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  }

  .site-footer__grid {
    grid-template-columns: 1.35fr 0.8fr 1fr;
  }

  .site-footer__legal {
    grid-column: 1 / -1;
  }
}

/* stylelint-disable-next-line media-feature-range-notation -- Contracted breakpoint syntax. */
@media (min-width: 56rem) {
  :root {
    --section-space: 4.75rem;
  }

  .home-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(22rem, 5fr);
    align-items: center;
    gap: 3rem;
  }

  .home-hero__mark img {
    width: min(70%, 20rem);
  }

  .home-hero__mark {
    min-height: 11rem;
    transform: translate(6%, 4%);
  }

  .signal-path {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.5rem;
  }

  .signal-path::before {
    inset: 0.31rem calc(25% - 0.75rem) auto 0.31rem;
    width: auto;
    height: 1px;
    background: linear-gradient(90deg, var(--cyan), var(--teal) 56%, var(--green));
  }

  .signal-path li,
  .signal-path li:last-child {
    min-height: 10rem;
    padding: 2.75rem 1.5rem 0 0;
  }

  .signal-path__marker {
    position: absolute;
    top: 0;
    left: 0;
    margin: 0;
  }

  .signal-path__number {
    position: absolute;
    top: -1.75rem;
    left: 1.25rem;
    white-space: nowrap;
  }

  .signal-path__label {
    display: inline;
  }

  .signal-path li::after {
    top: 0.08rem;
    left: 1.1rem;
    width: 1.35rem;
    height: 0.4rem;
    background: repeating-linear-gradient(90deg, var(--stage-color) 0 1px, transparent 1px 0.32rem);
  }

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

/* stylelint-disable-next-line media-feature-range-notation -- Contracted breakpoint syntax. */
@media (max-width: 55.999rem) {
  .kide-field::before {
    animation: none;
    will-change: auto;
  }

  .site-header.nav-enhanced .nav-toggle {
    display: inline-flex;
  }

  .site-header.nav-enhanced .nav-panel {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    display: none;
    max-height: calc(100vh - 4rem);
    overflow-y: auto;
    padding: 1rem var(--gutter) 1.5rem;
    border-bottom: 1px solid var(--ice);
    background: var(--paper);
  }

  .site-header.nav-enhanced.is-open .nav-panel {
    display: block;
  }

  .top-nav,
  .lang-switch {
    align-items: stretch;
    flex-direction: column;
  }

  .top-nav a,
  .lang-switch a {
    min-height: 3rem;
    padding-inline: 0;
  }

  .lang-switch {
    margin-top: 0.75rem;
    padding: 0.75rem 0 0;
    border-top: 1px solid var(--ice);
    border-left: 0;
  }

  .lang-switch span {
    display: none;
  }

  .hero-actions .btn {
    width: 100%;
  }
}

@media (width >= 64rem) {
  :root {
    --gutter: 3rem;
  }

  .contact-grid {
    gap: 4rem;
  }

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

  .evidence-chain--compact {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 1.25rem;
  }

  .evidence-chain--compact::before {
    inset: 0.31rem calc(20% - 1.25rem) auto 0.31rem;
    width: auto;
    height: 1px;
    background: linear-gradient(90deg, var(--cyan), var(--teal) 52%, var(--green));
  }

  .evidence-chain--compact li,
  .evidence-chain--compact li:last-child {
    min-height: 6rem;
    padding: 2.25rem 1rem 0 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}