/* Phase 13 design system -- "Field Report" direction. Tokens mirror the
   scoring model itself: technical (denim) + practical (gold) are the only
   two hues in the palette, no third "brand" accent. */

:root {
  --color-paper: #FBFAF6;
  --color-surface: #F1EFE6;
  --color-ink: #1B1B18;
  --color-ink-muted: #5C594F;
  --color-rule: #DEDACB;
  --color-technical: #3A5A96;
  --color-technical-soft: #E2E6EF;
  --color-practical: #C08A2E;
  --color-practical-soft: #F2E4C8;

  --font-display: "Fraunces", Georgia, serif;
  --font-body: "IBM Plex Sans", -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "Courier New", monospace;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 40px;
  --space-6: 64px;

  --radius-card: 10px;
  --max-width: 1120px;
}

* { box-sizing: border-box; }

html {
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 var(--space-3);
}

h1 { font-size: clamp(2.2rem, 4vw, 3.4rem); }
h2 { font-size: clamp(1.5rem, 2.4vw, 2rem); }
h3 { font-size: 1.15rem; }

p { margin: 0 0 var(--space-3); color: var(--color-ink); }

a { color: var(--color-technical); text-decoration: none; }
a:hover { text-decoration: underline; }

.mono, code { font-family: var(--font-mono); overflow-wrap: anywhere; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.split-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  align-items: start;
}

/* -- Nav -------------------------------------------------------------- */

.site-nav {
  border-bottom: 1px solid var(--color-rule);
  background: var(--color-paper);
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.site-nav__mark {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--color-ink);
}

.site-nav__links {
  display: flex;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__links a {
  color: var(--color-ink-muted);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
}

.site-nav__links a[aria-current="page"] {
  color: var(--color-ink);
  border-bottom: 2px solid var(--color-technical);
  padding-bottom: 2px;
}

/* -- Split-bar signature element --------------------------------------- */

.split-bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.split-bar__track {
  flex: 1 1 auto;
  height: 8px;
  border-radius: 999px;
  overflow: hidden;
  display: flex;
  background: var(--color-ink);
  min-width: 60px;
}

.split-bar__technical { background: var(--color-technical); height: 100%; }
.split-bar__practical { background: var(--color-practical); height: 100%; }

.split-bar__total {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
}

/* -- Stat tiles ---------------------------------------------------------- */

.stat-tile-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-3);
  margin: var(--space-5) 0;
}

.stat-tile {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  padding: var(--space-4);
}

.stat-tile .eyebrow { margin-bottom: var(--space-2); }

.stat-tile__value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 600;
}

.stat-tile__caption {
  color: var(--color-ink-muted);
  font-size: 0.9rem;
  margin-top: var(--space-1);
}

/* -- Cards (nav cards / ticket stubs) ------------------------------------ */

.card-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
  margin: var(--space-5) 0;
}

.ticket-card {
  display: block;
  background: var(--color-paper);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-card);
  padding: var(--space-4);
  transition: border-color 0.15s ease;
}

.ticket-card:hover { border-color: var(--color-technical); text-decoration: none; }
.ticket-card h3 { margin-bottom: var(--space-2); }
.ticket-card p { color: var(--color-ink-muted); margin: 0; }

/* -- Chart sections -------------------------------------------------------- */

.chart-section { margin-top: var(--space-6); margin-bottom: var(--space-6); }

.chart-section__insight {
  font-family: var(--font-display);
  font-size: 1.2rem;
  max-width: 640px;
  margin-bottom: var(--space-3);
}

.chart-tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--color-ink);
  color: var(--color-paper);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: var(--space-2) var(--space-3);
  border-radius: 6px;
  opacity: 0;
  transition: opacity 0.1s ease;
  max-width: 240px;
  z-index: 20;
}

.chart-grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-4);
}

.chart-legend {
  display: flex;
  gap: var(--space-4);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  margin-bottom: var(--space-2);
}

.chart-legend__item { display: flex; align-items: center; gap: var(--space-1); }

.chart-legend__swatch {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  display: inline-block;
}

/* -- Explorer table -------------------------------------------------------- */

.table-controls { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-3); }

.table-controls input, .table-controls select {
  font-family: var(--font-body);
  border: 1px solid var(--color-rule);
  border-radius: 6px;
  padding: var(--space-2);
}

.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }

.btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: var(--color-surface);
  color: var(--color-ink);
  border: 1px solid var(--color-rule);
  border-radius: 6px;
  padding: var(--space-2) var(--space-3);
  cursor: pointer;
}

.btn:hover { border-color: var(--color-technical); }

.table-load-more { margin-top: var(--space-3); }

table.explorer-table { width: 100%; min-width: 640px; border-collapse: collapse; }

.explorer-table th, .explorer-table td {
  text-align: left;
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-rule);
  font-size: 0.9rem;
}

.explorer-table th {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
  cursor: pointer;
}

/* -- Pipeline diagrams ------------------------------------------------------ */

.pipeline-flow { display: flex; align-items: stretch; gap: var(--space-2); overflow-x: auto; padding: var(--space-3) 0; overflow-wrap: anywhere; }

.pipeline-stage-card {
  flex: 0 0 200px;
  background: var(--color-surface);
  border-radius: var(--radius-card);
  padding: var(--space-3);
}

.pipeline-stage-card--optional { border: 1px dashed var(--color-ink-muted); background: transparent; }

.pipeline-stage-card__name {
  font-family: var(--font-mono);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.85rem;
}

.pipeline-stage-card__tag {
  display: inline-block;
  margin-top: var(--space-1);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-ink-muted);
}

.pipeline-arrow { flex: 0 0 24px; align-self: center; color: var(--color-ink-muted); font-size: 1.2rem; }

.bucket-card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  padding: var(--space-3);
  margin-bottom: var(--space-2);
  font-size: 0.85rem;
}

.bucket-card__name { font-family: var(--font-mono); font-weight: 600; }

.callout-box {
  background: var(--color-technical-soft);
  border-left: 4px solid var(--color-technical);
  border-radius: 6px;
  padding: var(--space-3) var(--space-4);
  margin: var(--space-4) 0;
}

.callout-box h3 { margin-bottom: var(--space-2); }
.callout-box ol { margin: 0; padding-left: 1.2em; }

/* -- Footer ------------------------------------------------------------------ */

.site-footer {
  border-top: 1px solid var(--color-rule);
  margin-top: var(--space-6);
  padding: var(--space-4) 0;
  color: var(--color-ink-muted);
  font-size: 0.85rem;
}

/* -- Responsive --------------------------------------------------------------- */

.chart-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }

@media (max-width: 820px) {
  .split-layout { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .site-nav__links { gap: var(--space-3); flex-wrap: wrap; justify-content: center; }
  .site-nav .wrap { flex-direction: column; height: auto; padding: var(--space-2) var(--space-4); gap: var(--space-2); }
}

@media (max-width: 480px) {
  .wrap { padding: 0 var(--space-3); }
  .table-controls input, .table-controls select { flex: 1 1 100%; }
}

/* -- Accessibility ------------------------------------------------------------- */

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

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

/* -- Scoring engine diagram (pipeline page) --------------------------------- */

.scoring-engine {
  display: grid;
  grid-template-columns: 2fr auto 1fr auto 1fr;
  gap: var(--space-3);
  align-items: start;
  overflow-x: auto;
  padding: var(--space-3) 0;
  overflow-wrap: anywhere;
}

.scoring-engine__buckets, .scoring-engine__totals, .scoring-engine__total {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  min-width: 160px;
}

.scoring-engine__arrow {
  align-self: center;
  color: var(--color-ink-muted);
  font-size: 1.2rem;
}