:root {
  color-scheme: dark light;
  --canvas: #07090d;
  --surface: #10151d;
  --ink: #f2f6fb;
  --muted: #a7b0bd;
  --line: #27313d;
  --observe: #4cd8e8;
  --budget: #f5c451;
  --uncertain: #a78bfa;
  --verified: #59d88e;
  --danger: #ff6b8a;
  --shell: 72rem;
  --mono: ui-monospace, "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.6;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 20rem;
  background-color: var(--canvas);
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 4rem 4rem;
  background-position: center top;
}

a {
  color: inherit;
  text-decoration-color: var(--observe);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

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

:focus-visible {
  outline: 3px solid var(--budget);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 0.75rem;
  left: 0.75rem;
  min-height: 40px;
  padding: 0.5rem 0.8rem;
  color: var(--canvas);
  background: var(--budget);
  font-weight: 700;
  transform: translateY(-180%);
}

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

.site-header,
main,
.site-footer {
  width: min(calc(100% - 2rem), var(--shell));
  margin-inline: auto;
}

.site-header {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1.5rem;
  align-items: center;
  min-height: 5rem;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--canvas) 92%, transparent);
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.7rem;
  min-height: 40px;
  text-decoration: none;
}

.brand span {
  color: var(--observe);
  font-family: var(--mono);
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.brand small,
.language-switch,
.kicker,
.state-label,
.evidence-id,
code {
  font-family: var(--mono);
}

.brand small {
  color: var(--muted);
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-list a,
.language-switch,
.control {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  padding: 0.45rem 0.72rem;
  border: 1px solid transparent;
  text-decoration: none;
}

.nav-list a[aria-current="page"] {
  border-color: var(--observe);
  color: var(--observe);
  background: var(--surface);
}

.language-switch {
  color: var(--muted);
  font-size: 0.82rem;
}

main {
  padding-block: clamp(2rem, 6vw, 5rem);
}

.hero {
  position: relative;
  max-width: 58rem;
  padding: clamp(1.5rem, 5vw, 4rem);
  border: 1px solid var(--line);
  background: var(--surface);
}

.hero::before {
  position: absolute;
  top: -1px;
  left: -1px;
  width: 9rem;
  height: 3px;
  background: var(--observe);
  content: "";
}

.kicker {
  margin: 0 0 0.75rem;
  color: var(--observe);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2 {
  margin-block: 0;
  line-height: 1.12;
  letter-spacing: -0.025em;
}

h1 {
  max-width: 18ch;
  font-size: clamp(2.25rem, 7vw, 5.25rem);
}

h2 {
  font-size: clamp(1.45rem, 3vw, 2.2rem);
}

.lede {
  max-width: 68ch;
  margin: 1.5rem 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.28rem);
}

.status {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  align-items: center;
  max-width: max-content;
  margin: 1.5rem 0;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--line);
  background: var(--canvas);
}

.state-label {
  color: var(--ink);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status--observe,
.signal--observe {
  border-left: 4px solid var(--observe);
}

.status--budget,
.signal--budget {
  border-left: 4px solid var(--budget);
}

.status--uncertain,
.signal--uncertain {
  border-left: 4px solid var(--uncertain);
}

.status--verified,
.signal--verified {
  border-left: 4px solid var(--verified);
}

.status--danger,
.signal--danger {
  border-left: 4px solid var(--danger);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.control {
  border-color: var(--observe);
  background: var(--observe);
  color: var(--canvas);
  font-weight: 750;
}

.control:hover {
  background: transparent;
  color: var(--observe);
}

.control--quiet {
  border-color: var(--line);
  background: transparent;
  color: var(--ink);
}

.content-section {
  display: grid;
  grid-template-columns: minmax(13rem, 0.75fr) minmax(0, 1.5fr);
  gap: clamp(1.5rem, 5vw, 5rem);
  padding-block: clamp(2.5rem, 6vw, 5rem);
  border-bottom: 1px solid var(--line);
}

.content-section > p {
  max-width: 68ch;
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.signal-grid,
.evidence-list {
  grid-column: 2;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.signal {
  display: grid;
  gap: 0.35rem;
  min-height: 6.75rem;
  padding: 1rem;
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.signal > span:last-child {
  color: var(--muted);
}

.lab-panel {
  margin-top: clamp(2.5rem, 6vw, 5rem);
  padding: clamp(1.25rem, 4vw, 2.5rem);
  border: 1px solid var(--line);
  background: var(--surface);
}

.lab-notice {
  max-width: 68ch;
  color: var(--muted);
}

.apr-lab {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.apr-lab fieldset {
  min-width: 0;
  margin: 0;
  padding: 1rem;
  border: 1px solid var(--line);
}

.apr-lab legend,
.lab-output dt {
  font-family: var(--mono);
  font-weight: 800;
}

.lab-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.5rem;
}

.lab-choice {
  display: flex;
  min-height: 40px;
  gap: 0.55rem;
  align-items: center;
  padding: 0.45rem 0.65rem;
  border: 1px solid var(--line);
  background: var(--canvas);
  cursor: pointer;
}

.lab-choice:has(input:checked) {
  border-color: var(--observe);
}

.lab-choice input {
  width: 1.15rem;
  height: 1.15rem;
  margin: 0;
  accent-color: var(--observe);
}

.lab-output {
  grid-column: 1 / -1;
  display: block;
  min-height: 8rem;
  padding: 1rem;
  border-left: 4px solid var(--budget);
  background: var(--canvas);
}

.lab-output dl {
  display: grid;
  grid-template-columns: minmax(12rem, 0.7fr) minmax(0, 1fr);
  gap: 0;
  margin: 0;
}

.lab-output dt,
.lab-output dd {
  margin: 0;
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid var(--line);
}

.lab-output dd {
  overflow-wrap: anywhere;
  color: var(--muted);
}

.lab-error {
  margin: 0;
  color: var(--danger);
  font-weight: 700;
}

.evidence-list {
  grid-template-columns: 1fr;
}

.evidence-list a {
  display: grid;
  grid-template-columns: minmax(8rem, 0.3fr) minmax(0, 1fr);
  gap: 1rem;
  min-height: 40px;
  align-items: center;
  padding: 0.8rem;
  border: 1px solid var(--line);
  background: var(--surface);
  text-decoration: none;
}

.evidence-list code {
  overflow-wrap: anywhere;
  color: var(--muted);
  font-size: 0.82rem;
}

.evidence-id {
  color: var(--observe);
  font-size: 0.78rem;
}

.site-footer {
  padding-block: 2rem 4rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.site-footer code {
  overflow-wrap: anywhere;
}

@media (prefers-color-scheme: light) {
  :root {
    --canvas: #f3f7fa;
    --surface: #ffffff;
    --ink: #111820;
    --muted: #4c5865;
    --line: #cad5df;
    --observe: #007f91;
    --budget: #8a6200;
    --uncertain: #6847b8;
    --verified: #167447;
    --danger: #b1264b;
  }
}

@media (max-width: 52rem) {
  .site-header,
  .content-section,
  .signal-grid,
  .evidence-list a,
  .apr-lab,
  .lab-output dl {
    grid-template-columns: 1fr;
  }

  .site-header {
    gap: 0.5rem;
    padding-block: 1rem;
  }

  .nav-list {
    justify-content: flex-start;
  }

  .language-switch {
    justify-self: start;
  }

  .signal-grid,
  .evidence-list {
    grid-column: 1;
  }
}

@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;
  }
}