:root {
  --df-bg: #07050a;
  --df-surface: #100d14;
  --df-surface-raised: #17121c;
  --df-surface-soft: #1d1723;
  --df-border: #302737;
  --df-border-strong: #4b3c51;
  --df-text: #f5eff7;
  --df-muted: #b8abbc;
  --df-faint: #8d7f92;
  --df-pink: #f04a9d;
  --df-pink-soft: #2b1322;
  --df-cyan: #78d7df;
  --df-amber: #f0c46a;
  --df-green: #65d7a2;
  --df-red: #ff8585;
  --df-radius: 18px;
  --df-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --df-display: "Space Grotesk", Inter, system-ui, sans-serif;
  --df-body: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  color-scheme: dark;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 76% -10%, rgba(240, 74, 157, 0.08), transparent 34rem),
    var(--df-bg);
  color: var(--df-text);
  font-family: var(--df-body);
  -webkit-font-smoothing: antialiased;
}

button,
input,
select {
  font: inherit;
}

button,
a,
select,
input {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--df-cyan);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 12px;
  z-index: 1000;
  transform: translateY(-150%);
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--df-text);
  color: var(--df-bg);
  font-weight: 700;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 28px;
  min-height: 70px;
  padding: 0 clamp(18px, 4vw, 64px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(7, 5, 10, 0.92);
  backdrop-filter: blur(16px);
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid var(--df-border-strong);
  border-radius: 50%;
  color: var(--df-pink);
  font: 700 11px var(--df-mono);
}

.brand-name {
  font: 600 16px var(--df-display);
  letter-spacing: -0.02em;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  scrollbar-width: none;
}

.site-nav::-webkit-scrollbar {
  display: none;
}

.site-nav a {
  color: var(--df-muted);
  font-size: 13px;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--df-text);
}

.site-nav a[aria-current="page"] {
  text-decoration: underline;
  text-decoration-color: var(--df-pink);
  text-underline-offset: 8px;
}

.header-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--df-muted);
  font: 500 10px var(--df-mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

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

.depth-switcher {
  display: inline-flex;
  align-items: center;
  padding: 4px;
  border: 1px solid var(--df-border);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.025);
}

.depth-switcher button {
  min-height: 34px;
  padding: 0 12px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--df-faint);
  cursor: pointer;
  font-size: 11px;
}

.depth-switcher button:hover {
  color: var(--df-text);
}

.depth-switcher button.is-active {
  background: var(--df-surface-soft);
  color: var(--df-text);
  box-shadow: inset 0 0 0 1px var(--df-border);
}

.eyebrow {
  color: var(--df-cyan);
  font: 500 10px var(--df-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.classification,
.status-badge,
.freshness-badge,
.comparability-badge {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-height: 25px;
  padding: 4px 8px;
  border: 1px solid var(--df-border);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--df-muted);
  font: 500 9px/1.2 var(--df-mono);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.classification-observed {
  border-color: rgba(101, 215, 162, 0.36);
  color: var(--df-green);
}

.classification-normalized {
  border-color: rgba(120, 215, 223, 0.36);
  color: var(--df-cyan);
}

.classification-calculated {
  border-color: rgba(240, 196, 106, 0.36);
  color: var(--df-amber);
}

.classification-interpreted,
.comparability-badge {
  border-color: rgba(240, 74, 157, 0.35);
  color: #f59ac7;
}

.explainable {
  position: relative;
  border: 0;
  border-bottom: 1px dotted rgba(120, 215, 223, 0.65);
  background: transparent;
  color: inherit;
  cursor: help;
  text-align: inherit;
}

.explainable::after {
  margin-left: 0.35em;
  color: var(--df-cyan);
  content: "↗";
  font: 500 0.68em var(--df-mono);
  vertical-align: top;
}

.explainable:hover,
.explainable.is-explained {
  color: #fff;
  border-color: var(--df-pink);
}

.explanation-tooltip {
  position: fixed;
  z-index: 100;
  display: grid;
  gap: 6px;
  padding: 13px 14px;
  border: 1px solid var(--df-border-strong);
  border-radius: 12px;
  background: rgba(17, 13, 21, 0.98);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.5);
  pointer-events: none;
}

.explanation-tooltip[hidden] {
  display: none;
}

.explanation-tooltip strong,
.explanation-tooltip span,
.explanation-tooltip em {
  font-size: 12px;
  line-height: 1.45;
}

.explanation-tooltip strong {
  color: var(--df-text);
}

.explanation-tooltip span {
  color: var(--df-muted);
}

.explanation-tooltip em {
  color: var(--df-amber);
  font-style: normal;
}

.unknown-value {
  display: grid;
  gap: 8px;
  padding: 16px;
  border: 1px dashed rgba(240, 196, 106, 0.45);
  border-radius: 13px;
  background: rgba(240, 196, 106, 0.045);
}

.unknown-value strong {
  color: var(--df-amber);
  font: 600 15px var(--df-display);
}

.unknown-value p {
  margin: 0;
  color: var(--df-muted);
  font-size: 12px;
  line-height: 1.55;
}

.explanation-inspector {
  position: relative;
  min-width: 0;
  border: 1px solid var(--df-border);
  border-radius: var(--df-radius);
  background: var(--df-surface);
  box-shadow: 0 26px 80px rgba(0, 0, 0, 0.35);
}

.inspector-toolbar {
  display: flex;
  min-height: 50px;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
  border-bottom: 1px solid var(--df-border);
  color: var(--df-faint);
  font: 500 10px var(--df-mono);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.inspector-close {
  display: none;
  width: 34px;
  height: 34px;
  border: 1px solid var(--df-border);
  border-radius: 9px;
  background: transparent;
  color: var(--df-muted);
  cursor: pointer;
  font-size: 20px;
}

.inspector-body {
  padding: 22px;
}

.inspector-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
}

.inspector-heading h3 {
  margin: 7px 0 0;
  font: 600 clamp(22px, 3vw, 32px)/1.08 var(--df-display);
  letter-spacing: -0.035em;
}

.inspector-value {
  margin: 0 0 24px;
  font: 600 clamp(28px, 4vw, 46px)/1 var(--df-display);
  letter-spacing: -0.04em;
}

.inspector-value small {
  display: block;
  margin-top: 7px;
  color: var(--df-faint);
  font: 500 10px var(--df-mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.inspector-section {
  padding: 16px 0;
  border-top: 1px solid var(--df-border);
}

.inspector-section h4 {
  margin: 0 0 8px;
  color: var(--df-muted);
  font: 500 10px var(--df-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.inspector-section p,
.inspector-section li,
.inspector-empty {
  color: var(--df-muted);
  font-size: 13px;
  line-height: 1.6;
}

.inspector-section p,
.inspector-empty {
  margin: 0;
}

.inspector-section ul {
  display: grid;
  gap: 5px;
  margin: 0;
  padding-left: 18px;
}

.inspector-section.boundary {
  border: 1px solid rgba(240, 196, 106, 0.22);
  border-radius: 12px;
  padding: 14px;
  background: rgba(240, 196, 106, 0.04);
}

.inspector-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.audit-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--df-border);
  border-left: 1px solid var(--df-border);
}

.audit-field {
  min-width: 0;
  padding: 13px;
  border-right: 1px solid var(--df-border);
  border-bottom: 1px solid var(--df-border);
}

.audit-field dt {
  margin-bottom: 6px;
  color: var(--df-faint);
  font: 500 9px var(--df-mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.audit-field dd {
  margin: 0;
  overflow-wrap: anywhere;
  color: var(--df-text);
  font-size: 12px;
  line-height: 1.5;
}

.audit-unknown {
  color: var(--df-amber);
}

.source-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
  color: var(--df-cyan);
  font-size: 12px;
  font-weight: 600;
  text-decoration: none;
}

.source-link:hover {
  text-decoration: underline;
}

.source-missing {
  color: var(--df-amber);
  font-size: 12px;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 30px clamp(18px, 4vw, 64px);
  border-top: 1px solid var(--df-border);
  color: var(--df-faint);
  font-size: 11px;
}

.footer nav {
  display: flex;
  gap: 18px;
}

@media (max-width: 820px) {
  .site-header {
    grid-template-columns: 1fr auto;
    gap: 16px;
  }

  .site-nav {
    order: 3;
    grid-column: 1 / -1;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 12px;
  }

  .header-status {
    display: none;
  }

  .inspector-columns,
  .audit-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .explanation-inspector {
    position: fixed;
    inset: 0;
    z-index: 90;
    display: grid;
    align-items: end;
    border: 0;
    border-radius: 0;
    background: rgba(0, 0, 0, 0.68);
    opacity: 0;
    pointer-events: none;
    transition: opacity 160ms ease;
  }

  .explanation-inspector::before {
    position: absolute;
    inset: 0;
    content: "";
  }

  .explanation-inspector.is-open {
    opacity: 1;
    pointer-events: auto;
  }

  .inspector-panel {
    position: relative;
    z-index: 1;
    max-height: 88vh;
    overflow: auto;
    border: 1px solid var(--df-border-strong);
    border-bottom: 0;
    border-radius: 20px 20px 0 0;
    background: var(--df-surface);
    transform: translateY(24px);
    transition: transform 160ms ease;
  }

  .explanation-inspector.is-open .inspector-panel {
    transform: translateY(0);
  }

  .inspector-close {
    display: grid;
    place-items: center;
  }

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

@media (max-width: 520px) {
  .site-header {
    padding-inline: 14px;
  }

  .brand-name {
    font-size: 14px;
  }

  .site-nav {
    gap: 18px;
  }

  .depth-switcher button {
    padding: 0 8px;
    font-size: 10px;
  }

  .inspector-body {
    padding: 18px;
  }
}

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

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