:root {
  --color-abyss: #0B131E;
  --color-hull: #111B27;
  --color-deck: #182332;
  --color-mist: #94A3B8;
  --color-foam: #F1F5F9;
  --color-signal: #00D2C4;
  --color-current: #06B6D4;
  --color-copper: #D97706;

  --font-heading: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;

  --text-display: clamp(2.5rem, 5vw, 4.5rem);
  --text-h1: clamp(2rem, 4vw, 3.25rem);
  --text-h2: clamp(1.5rem, 3vw, 2.25rem);
  --text-h3: clamp(1.25rem, 2vw, 1.5rem);
  --text-h4: 1.125rem;
  --text-body-lg: 1.125rem;
  --text-body: 1rem;
  --text-body-sm: 0.875rem;
  --text-caption: 0.75rem;
  --text-button: 0.9375rem;

  --leading-display: 1.05;
  --leading-h1: 1.1;
  --leading-h2: 1.15;
  --leading-h3: 1.2;
  --leading-h4: 1.3;
  --leading-body-lg: 1.65;
  --leading-body: 1.65;
  --leading-body-sm: 1.6;
  --leading-caption: 1.5;
  --leading-button: 1;

  --weight-body: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;

  --tracking-display: -0.02em;
  --tracking-h1: -0.02em;
  --tracking-h2: -0.01em;
  --tracking-h3: -0.01em;
  --tracking-h4: 0em;
  --tracking-body-lg: 0em;
  --tracking-body: 0em;
  --tracking-body-sm: 0em;
  --tracking-caption: 0.04em;
  --tracking-button: 0.01em;

  --space-3xs: 0.25rem;
  --space-2xs: 0.5rem;
  --space-xs: 0.75rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  --space-4xl: 8rem;

  --container-primary: 1200px;
  --container-wide: 1440px;
  --container-narrow: 720px;
  --container-padding-mobile: var(--space-md);
  --container-padding-desktop: var(--space-xl);

  --border-mist-15: 1px solid rgba(148, 163, 184, 0.15);
  --border-mist-25: 1px solid rgba(148, 163, 184, 0.25);
  --border-mist-12: 1px solid rgba(148, 163, 184, 0.12);

  --radius-0: 0px;
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;

  --transition-color: 150ms ease-out;
  --transition-transform: 200ms ease-out;
  --transition-opacity: 200ms ease-out;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  background-color: var(--color-abyss);
  color: var(--color-mist);
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  letter-spacing: var(--tracking-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
  letter-spacing: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
  text-align: inherit;
}

a {
  color: var(--color-signal);
  text-decoration: none;
  transition: color var(--transition-color);
}

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

ul,
ol {
  list-style: none;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
  width: 100%;
}

th,
td {
  text-align: left;
  vertical-align: top;
}

blockquote,
figure {
  margin: 0;
}

fieldset {
  border: none;
  margin: 0;
  padding: 0;
}

legend {
  padding: 0;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  color: var(--color-foam);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-h3);
  letter-spacing: var(--tracking-h3);
  margin-block-end: var(--space-sm);
}

h1 {
  font-size: var(--text-h1);
  font-weight: var(--weight-bold);
  line-height: var(--leading-h1);
  letter-spacing: var(--tracking-h1);
  margin-block-end: var(--space-md);
}

h2 {
  font-size: var(--text-h2);
  line-height: var(--leading-h2);
  letter-spacing: var(--tracking-h2);
  margin-block-end: var(--space-sm);
}

h3 {
  font-size: var(--text-h3);
  line-height: var(--leading-h3);
  letter-spacing: var(--tracking-h3);
  margin-block-end: var(--space-sm);
}

h4 {
  font-size: var(--text-h4);
  line-height: var(--leading-h4);
  letter-spacing: var(--tracking-h4);
  margin-block-end: var(--space-xs);
}

p {
  margin-block-end: var(--space-sm);
  line-height: var(--leading-body);
}

p:last-child {
  margin-block-end: 0;
}

ul,
ol {
  margin-block-end: var(--space-sm);
  padding-inline-start: var(--space-md);
}

ul:last-child,
ol:last-child {
  margin-block-end: 0;
}

ul {
  list-style: disc;
}

ol {
  list-style: decimal;
}

li {
  line-height: var(--leading-body);
}

blockquote {
  margin-block-end: var(--space-sm);
  padding-inline-start: var(--space-md);
  border-inline-start: 2px solid var(--color-signal);
  color: var(--color-mist);
  font-style: normal;
}

blockquote:last-child {
  margin-block-end: 0;
}

figure {
  margin-block-end: var(--space-sm);
}

figure:last-child {
  margin-block-end: 0;
}

figcaption {
  font-size: var(--text-caption);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-caption);
  text-transform: uppercase;
  color: var(--color-mist);
  margin-block-start: var(--space-2xs);
}

hr {
  border: none;
  border-top: var(--border-mist-12);
  margin-block: var(--space-lg);
}

code,
kbd,
samp,
pre {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.875em;
}

pre {
  background-color: var(--color-deck);
  border: var(--border-mist-15);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  overflow-x: auto;
  margin-block-end: var(--space-sm);
}

pre:last-child {
  margin-block-end: 0;
}

small {
  font-size: var(--text-body-sm);
  line-height: var(--leading-body-sm);
}

strong {
  font-weight: var(--weight-semibold);
  color: var(--color-foam);
}

em {
  font-style: normal;
  color: var(--color-signal);
}

abbr[title] {
  text-decoration: none;
  border-bottom: 1px dotted var(--color-mist);
  cursor: help;
}

mark {
  background-color: rgba(0, 210, 196, 0.15);
  color: var(--color-foam);
}

::selection {
  background-color: rgba(0, 210, 196, 0.25);
  color: var(--color-foam);
}

:focus-visible {
  outline: 2px solid var(--color-signal);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

.container {
  width: 100%;
  max-width: var(--container-primary);
  margin-inline: auto;
  padding-inline: var(--container-padding-mobile);
}

.container-wide {
  width: 100%;
  max-width: var(--container-wide);
  margin-inline: auto;
  padding-inline: var(--container-padding-mobile);
}

.surface-hull {
  background-color: var(--color-hull);
  border: var(--border-mist-15);
  border-radius: var(--radius-md);
}

.surface-deck {
  background-color: var(--color-deck);
  border: var(--border-mist-25);
  border-radius: var(--radius-md);
}

.coordinate-label {
  display: inline-block;
  font-size: var(--text-caption);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-caption);
  text-transform: uppercase;
  color: var(--color-mist);
  border-inline-start: 1px solid var(--color-signal);
  padding-inline-start: var(--space-2xs);
  margin-block-end: var(--space-sm);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xs);
  font-family: var(--font-body);
  font-size: var(--text-button);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-button);
  line-height: var(--leading-button);
  text-transform: uppercase;
  text-decoration: none;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  padding: var(--space-xs) var(--space-sm);
  min-height: 44px;
  min-width: 44px;
  cursor: pointer;
  transition: background-color var(--transition-color), border-color var(--transition-color), color var(--transition-color), transform var(--transition-transform);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background-color: var(--color-signal);
  color: var(--color-abyss);
  border-color: var(--color-signal);
}

.btn-primary:hover {
  background-color: var(--color-current);
  border-color: var(--color-current);
  color: var(--color-abyss);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-signal);
  border-color: var(--color-signal);
}

.btn-secondary:hover {
  background-color: rgba(0, 210, 196, 0.1);
  color: var(--color-signal);
  border-color: var(--color-signal);
}

.btn-tertiary {
  background-color: transparent;
  color: var(--color-mist);
  border-color: transparent;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.btn-tertiary:hover {
  color: var(--color-foam);
  text-decoration: underline;
}

.card {
  background-color: var(--color-hull);
  border: var(--border-mist-15);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

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

.card-deck {
  background-color: var(--color-deck);
  border: var(--border-mist-25);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.card-deck > :last-child {
  margin-block-end: 0;
}

.data-callout {
  background-color: var(--color-deck);
  border: var(--border-mist-15);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  margin-block-end: var(--space-sm);
}

.data-callout:last-child {
  margin-block-end: 0;
}

.data-callout-signal {
  border-inline-start: 3px solid var(--color-signal);
}

.data-callout-copper {
  border-inline-start: 3px solid var(--color-copper);
}

.image-card {
  background-color: var(--color-hull);
  border: var(--border-mist-15);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.image-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 0;
}

.image-card .image-card-body {
  padding: var(--space-md);
}

.image-card .image-card-body > :last-child {
  margin-block-end: 0;
}

.image-card h4 {
  margin-block-end: var(--space-2xs);
}

.image-card .caption {
  font-size: var(--text-caption);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-caption);
  text-transform: uppercase;
  color: var(--color-mist);
}

.breadcrumb {
  font-size: var(--text-caption);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-caption);
  text-transform: uppercase;
  color: var(--color-mist);
  margin-block-end: var(--space-sm);
}

.breadcrumb a {
  color: var(--color-mist);
  text-decoration: none;
  transition: color var(--transition-color);
}

.breadcrumb a:hover {
  color: var(--color-foam);
}

.breadcrumb .separator {
  margin-inline: var(--space-2xs);
  color: var(--color-mist);
}

.breadcrumb .current {
  color: var(--color-foam);
}

.accordion {
  background-color: var(--color-hull);
  border: var(--border-mist-15);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.accordion-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-foam);
  font-family: var(--font-heading);
  font-size: var(--text-body);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-body);
  text-align: start;
  min-height: 48px;
  transition: background-color var(--transition-color);
}

.accordion-header:hover {
  background-color: var(--color-deck);
}

.accordion-icon {
  flex-shrink: 0;
  color: var(--color-mist);
  transition: transform var(--transition-transform);
}

.accordion-header[aria-expanded="true"] .accordion-icon {
  transform: rotate(180deg);
}

.accordion-panel {
  padding: 0 var(--space-md) var(--space-md);
  font-size: var(--text-body-sm);
  line-height: var(--leading-body-sm);
  color: var(--color-mist);
}

.accordion-panel > :last-child {
  margin-block-end: 0;
}

.skeleton {
  background-color: var(--color-deck);
  border-radius: var(--radius-sm);
  position: relative;
  overflow: hidden;
  min-height: 1em;
}

.skeleton::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    rgba(148, 163, 184, 0.05) 0%,
    rgba(148, 163, 184, 0.15) 50%,
    rgba(148, 163, 184, 0.05) 100%
  );
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
}

@keyframes skeleton-shimmer {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

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

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-sm);
  z-index: 9999;
  background-color: var(--color-signal);
  color: var(--color-abyss);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-weight: var(--weight-semibold);
  text-decoration: none;
  transition: top var(--transition-transform);
}

.skip-link:focus {
  top: var(--space-sm);
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .btn:hover {
    transform: none;
  }

  .btn:active {
    transform: none;
  }

  .accordion-icon {
    transition: none;
  }

  .skeleton::after {
    animation: none;
  }
}

@media (min-width: 768px) {
  .container,
  .container-wide,
  .card {
    padding: var(--space-lg);
  }

  .card-deck {
    padding: var(--space-lg);
  }

  .image-card .image-card-body {
    padding: var(--space-lg);
  }
}