/**
 * Design tokens and global styling.
 *
 * Art direction: a two-dimensional modern noir dossier. Muted environments,
 * inked silhouettes, high-contrast evidence panels, one warm highlight.
 *
 * Rules that are not negotiable because the gates check them:
 *   - colour is never the only carrier of meaning (WCAG 1.4.1)
 *   - every interactive control is at least 44x44 CSS px on touch (WCAG 2.5.5)
 *   - focus is always visible (WCAG 2.4.7)
 *   - `prefers-reduced-motion` removes transitions, it does not merely shorten
 *   - no horizontal scroll at 320px, and text reflows at 200% zoom
 */

:root {
  /* Surfaces */
  --ink-900: #0b0e12;
  --ink-800: #11151b;
  --ink-700: #171d25;
  --ink-600: #1f2731;
  --ink-500: #2a3542;
  --line: #33404f;
  --line-soft: #26313d;

  /* Text */
  --paper: #e8e3d9;
  --paper-dim: #b9b3a6;
  --paper-faint: #8b8579;

  /* Accent: one warm highlight, used sparingly */
  --highlight: #e8a33d;
  --highlight-dim: #8a6224;

  /* Semantic: always paired with a word or icon, never colour alone */
  --supports: #4fae7a;
  --rules-out: #c9564f;
  --neutral: #7d8b9c;

  /* Type */
  --font-display: 'Iowan Old Style', 'Palatino Linotype', Palatino, Georgia, serif;
  --font-body: ui-sans-serif, system-ui, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  /* Spacing */
  --gap-1: 0.25rem;
  --gap-2: 0.5rem;
  --gap-3: 0.75rem;
  --gap-4: 1rem;
  --gap-5: 1.5rem;
  --gap-6: 2rem;

  --radius: 4px;
  --tap: 44px;

  --maxw: 68rem;
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  overflow-x: hidden;
}

/* A visible focus ring on every focusable thing, never removed. */
:focus-visible {
  outline: 3px solid var(--highlight);
  outline-offset: 2px;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 var(--gap-3);
  text-wrap: balance;
}

h1 {
  font-size: clamp(1.6rem, 1.2rem + 2vw, 2.4rem);
}

h2 {
  font-size: clamp(1.25rem, 1.05rem + 1vw, 1.6rem);
}

p {
  margin: 0 0 var(--gap-3);
}

a {
  color: var(--highlight);
  text-underline-offset: 2px;
}

button {
  font: inherit;
  color: inherit;
}

/* --- layout ------------------------------------------------------------- */

.shell {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: var(--gap-4);
}

@media (min-width: 60rem) {
  .shell {
    padding: var(--gap-5);
  }
}

/* --- top bar ------------------------------------------------------------ */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: var(--gap-3);
  padding: var(--gap-2) var(--gap-4);
  background: color-mix(in srgb, var(--ink-900) 92%, transparent);
  border-bottom: 1px solid var(--line-soft);
  backdrop-filter: blur(8px);
}

.topbar__mark {
  font-family: var(--font-display);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.85rem;
  color: var(--paper-dim);
}

.topbar__budget {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--paper-dim);
  white-space: nowrap;
}

/* --- buttons ------------------------------------------------------------ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--gap-2);
  min-height: var(--tap);
  min-width: var(--tap);
  padding: var(--gap-2) var(--gap-4);
  background: var(--ink-700);
  color: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.95rem;
  text-align: center;
  transition: background 120ms ease, border-color 120ms ease;
}

.btn:hover:not(:disabled) {
  background: var(--ink-600);
  border-color: var(--highlight-dim);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn--primary {
  background: var(--highlight);
  border-color: var(--highlight);
  color: #17130a;
  font-weight: 600;
}

.btn--primary:hover:not(:disabled) {
  background: #f0b154;
  border-color: #f0b154;
  color: #17130a;
}

.btn--ghost {
  background: transparent;
}

.btn--block {
  width: 100%;
}

/* --- home --------------------------------------------------------------- */

.home {
  padding: var(--gap-6) var(--gap-4);
}

.home__lede {
  font-size: 1.05rem;
  color: var(--paper-dim);
  max-width: 44rem;
}

.modes {
  display: grid;
  gap: var(--gap-4);
  margin-top: var(--gap-5);
  grid-template-columns: 1fr;
}

@media (min-width: 40rem) {
  .modes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.mode {
  display: block;
  padding: var(--gap-4);
  background: var(--ink-800);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  min-height: var(--tap);
  transition: border-color 120ms ease, background 120ms ease;
}

.mode:hover {
  background: var(--ink-700);
  border-color: var(--highlight-dim);
}

.mode__name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin: 0 0 var(--gap-1);
}

.mode__desc {
  margin: 0;
  color: var(--paper-dim);
  font-size: 0.9rem;
}

.mode__meta {
  margin-top: var(--gap-2);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--paper-faint);
}

/* --- desk --------------------------------------------------------------- */

.desk {
  display: grid;
  gap: var(--gap-4);
  align-items: start;
}

@media (min-width: 64rem) {
  .desk {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }
}

.panel {
  background: var(--ink-800);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: var(--gap-4);
}

.panel + .panel {
  margin-top: var(--gap-4);
}

.panel__title {
  font-size: 0.95rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--paper-faint);
  margin: 0 0 var(--gap-3);
}

.dossier {
  color: var(--paper-dim);
  font-size: 0.95rem;
}

.dossier strong {
  color: var(--paper);
}

/* --- evidence list ------------------------------------------------------ */

.evidence {
  display: grid;
  gap: var(--gap-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.exhibit {
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-700);
  padding: var(--gap-3);
}

.exhibit--locked {
  opacity: 0.55;
  border-left-color: var(--ink-500);
  border-style: dashed;
}

.exhibit--open {
  border-left-color: var(--highlight);
}

.exhibit__head {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-2);
  align-items: baseline;
  margin-bottom: var(--gap-2);
}

.exhibit__name {
  font-weight: 600;
  margin: 0;
}

.exhibit__time {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--paper-faint);
}

.exhibit__text {
  margin: 0;
  color: var(--paper-dim);
  font-size: 0.92rem;
}

.exhibit__tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.1rem 0.35rem;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--paper-faint);
}

/* --- inquiries ---------------------------------------------------------- */

.inquiries {
  display: grid;
  gap: var(--gap-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.inquiry {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--gap-3);
  padding: var(--gap-3);
  background: var(--ink-700);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
}

.inquiry--done {
  opacity: 0.6;
}

.inquiry__label {
  flex: 1 1 14rem;
  min-width: 0;
  margin: 0;
  font-size: 0.92rem;
}

.inquiry__cost {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--paper-faint);
  white-space: nowrap;
}

.inquiry__reason {
  font-size: 0.78rem;
  color: var(--paper-faint);
  font-style: italic;
}

/* --- map ---------------------------------------------------------------- */

.map {
  width: 100%;
  height: auto;
  display: block;
  background: var(--ink-900);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
}

.map__node {
  fill: var(--ink-600);
  stroke: var(--line);
  stroke-width: 1.5;
}

.map__node--obscured {
  stroke-dasharray: 4 3;
}

.map__label {
  fill: var(--paper-dim);
  font-size: 11px;
  font-family: var(--font-body);
  paint-order: stroke;
  stroke: var(--ink-900);
  stroke-width: 3px;
}

.map__edge {
  stroke: var(--line-soft);
  stroke-width: 1.5;
}

/* --- theory board ------------------------------------------------------- */

.board {
  display: grid;
  gap: var(--gap-2);
}

.link {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--gap-2);
  padding: var(--gap-2) var(--gap-3);
  background: var(--ink-700);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  font-size: 0.88rem;
}

.link__rel {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.1rem 0.35rem;
  border-radius: 2px;
  border: 1px solid currentColor;
}

.link__rel--supports {
  color: var(--supports);
}
.link__rel--rules_out {
  color: var(--rules-out);
}
.link__rel--does_not_establish {
  color: var(--neutral);
}

.link__rm {
  margin-left: auto;
  background: none;
  border: none;
  color: var(--paper-faint);
  cursor: pointer;
  min-width: var(--tap);
  min-height: var(--tap);
}

/* --- verdict ------------------------------------------------------------ */

.verdict__row {
  display: grid;
  gap: var(--gap-2);
  margin-bottom: var(--gap-4);
}

.field {
  display: grid;
  gap: var(--gap-1);
}

.field > label {
  font-size: 0.85rem;
  color: var(--paper-dim);
}

select,
input[type='text'],
textarea {
  font: inherit;
  padding: var(--gap-2) var(--gap-3);
  background: var(--ink-900);
  color: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  min-height: var(--tap);
  width: 100%;
}

textarea {
  min-height: 6rem;
  resize: vertical;
}

/* --- debrief ------------------------------------------------------------ */

.debrief__score {
  font-family: var(--font-display);
  font-size: 3rem;
  line-height: 1;
  color: var(--highlight);
}

.debrief__grid {
  display: grid;
  gap: var(--gap-3);
  grid-template-columns: 1fr;
}

@media (min-width: 40rem) {
  .debrief__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.debrief__item {
  display: flex;
  justify-content: space-between;
  gap: var(--gap-3);
  padding: var(--gap-2) 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 0.9rem;
}

.debrief__item b {
  font-family: var(--font-mono);
}

/* --- misc --------------------------------------------------------------- */

.muted {
  color: var(--paper-dim);
}

.faint {
  color: var(--paper-faint);
}

.mono {
  font-family: var(--font-mono);
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-3);
  align-items: center;
}

.spread {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--gap-3);
}

.notice {
  padding: var(--gap-3);
  border: 1px solid var(--line);
  border-left: 3px solid var(--highlight);
  border-radius: var(--radius);
  background: var(--ink-700);
  font-size: 0.9rem;
  color: var(--paper-dim);
}

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

/* --- motion ------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* --- light mode --------------------------------------------------------- */

@media (prefers-color-scheme: light) {
  :root {
    --ink-900: #f4f1ea;
    --ink-800: #ebe7dd;
    --ink-700: #e0dbcf;
    --ink-600: #d3ccbc;
    --ink-500: #bdb4a1;
    --line: #a89e8b;
    --line-soft: #c9c0ae;
    --paper: #16181c;
    --paper-dim: #3d434c;
    --paper-faint: #5e646d;
  }
}