* { box-sizing: border-box; }

html {
  background: var(--porcelain);
  color: var(--charcoal);
  color-scheme: light;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: clip;
  background: var(--porcelain);
  color: var(--charcoal);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

body[data-state="transition"] { overflow: hidden; }

button, a { font: inherit; }
button { color: inherit; }
a { color: inherit; }

button:focus-visible,
a:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
}

[hidden] { display: none !important; }

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

.skip-link {
  position: fixed;
  z-index: 1000;
  top: .85rem;
  left: .85rem;
  translate: 0 -180%;
  padding: .75rem 1rem;
  background: var(--charcoal);
  color: var(--porcelain);
  border-radius: .25rem;
}

.skip-link:focus { translate: 0; }

.site-header {
  position: fixed;
  z-index: 200;
  inset: 0 0 auto;
  min-height: var(--header-height);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  padding: .85rem clamp(1rem, 3vw, 3rem);
  pointer-events: none;
  transition: background 240ms ease, color 240ms ease;
}

body[data-state="world"] .site-header,
body[data-state="express"] .site-header {
  background: linear-gradient(180deg, color-mix(in srgb, var(--porcelain) 94%, transparent), transparent);
}

.site-header > * { pointer-events: auto; }

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  width: fit-content;
  color: inherit;
  font: 600 .68rem/1 var(--mono);
  letter-spacing: .12em;
  text-decoration: none;
  min-width: 2.75rem;
  min-height: 2.75rem;
}

.wordmark:hover .wordmark__seal { rotate: -12deg; background: var(--charcoal); color: var(--porcelain); border-color: var(--charcoal); }

.wordmark__seal {
  transition: rotate .25s cubic-bezier(.2, 1.4, .4, 1), background-color .2s ease, color .2s ease;
  display: grid;
  width: 2rem;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50% 50% 50% 16%;
  font-family: var(--serif);
  font-size: 1rem;
  font-style: italic;
}

.site-header__route {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font: 600 .65rem/1 var(--mono);
  letter-spacing: .08em;
  text-transform: uppercase;
}

.status-light {
  width: .42rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--olive);
  box-shadow: 0 0 0 .22rem color-mix(in srgb, var(--olive) 16%, transparent);
}

.site-header__controls {
  grid-column: -2;
  justify-self: end;
  display: flex;
  align-items: center;
  gap: .45rem;
}

.utility-button {
  min-width: 2.75rem;
  min-height: 2.75rem;
  border: 1px solid var(--line);
  padding: .52rem .72rem;
  background: color-mix(in srgb, var(--porcelain) 82%, transparent);
  color: var(--charcoal);
  border-radius: 999px;
  font: 600 .62rem/1 var(--mono);
  letter-spacing: .04em;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  backdrop-filter: blur(12px);
}

.utility-button:hover { background: var(--white); }
.world-only { display: none; }
body[data-state="world"] .world-only { display: inline-flex; align-items: center; }

.noscript-card {
  position: fixed;
  z-index: 1000;
  inset: 6rem 1rem auto;
  max-width: 40rem;
  margin: auto;
  padding: 2rem;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}

@media (forced-colors: active) {
  button:focus-visible,
  a:focus-visible,
  [tabindex]:focus-visible { outline: 3px solid Highlight; }
  .route-card[aria-pressed="true"] { outline: 2px solid Highlight; outline-offset: -4px; }
}