/* Carriage matrix — shares the palette with /config, /map, /explainer and the
   tree view one level up. */

:root {
  --green:       #2d6a4f;
  --green-dark:  #1b4332;
  --green-mid:   #40916c;
  --green-light: #74c69d;
  --green-pale:  #d8f3dc;
  --blue:        #1a3a4a;
  --gold:        #f4c842;
  --gold-warm:   #f4a261;
  --accent:      #7e22ce;   /* "carried from another branch" — see src/main.js */
  --bg:          #f4f7f5;
  --surface:     #ffffff;
  --text:        #1a2e25;
  --text-muted:  #607a6e;
  --border:      #cce0d5;
  --border-soft: #e3eee8;
  --radius:      14px;
  --radius-sm:   9px;
  --shadow:      0 2px 16px rgba(27,67,50,0.10);
  --shadow-card: 0 1px 4px rgba(27,67,50,0.08);
  --font:        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, system-ui, sans-serif;
  --font-mono:   ui-monospace, "SF Mono", "Fira Code", Menlo, Consolas, monospace;

  --cell-w:      19px;
  --cell-h:      24px;
  --rowhead-w:   240px;
  --colhead-h:   82px;
  --grouprow-h:  20px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

code { font-family: var(--font-mono); }
a { color: var(--green); }
a:hover { color: var(--green-dark); }

.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;
}

.skip-link {
  position: absolute; top: -100%; left: 1rem; z-index: 100;
  background: var(--green-dark); color: #fff;
  padding: 0.5rem 1rem; border-radius: var(--radius-sm);
  font-size: 0.875rem; text-decoration: none;
}
.skip-link:focus { top: 1rem; }

:where(button, input, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--green); outline-offset: 2px;
}

/* ── Header ──────────────────────────────────────────────────────────────── */

.page-header {
  background: linear-gradient(135deg, var(--green-dark) 0%, var(--blue) 100%);
  color: #fff; padding: 1.75rem 1.5rem 2rem;
  position: relative; overflow: hidden;
}
.page-header::before {
  content: "";
  position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='60'%3E%3Cpolygon points='0,60 60,0 120,60' fill='rgba(255,255,255,0.03)'/%3E%3C/svg%3E") repeat-x bottom;
  background-size: 120px 60px;
}
.header-inner { position: relative; max-width: 1480px; margin: 0 auto; }

.page-header .badge {
  display: inline-flex; align-items: center; gap: 0.4rem;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 99px; padding: 0.25rem 0.75rem;
  font-size: 0.7rem; letter-spacing: 0.05em; text-transform: uppercase;
  font-weight: 600; margin-bottom: 0.6rem;
}
.page-header h1 {
  font-size: clamp(1.4rem, 3.4vw, 1.9rem);
  font-weight: 800; letter-spacing: -0.02em; line-height: 1.15;
}
.page-header .lede {
  margin-top: 0.45rem; font-size: 0.94rem; max-width: 64ch;
  color: rgba(255,255,255,0.82); line-height: 1.5;
}
.page-header em { font-style: normal; color: var(--gold); font-weight: 600; }

.header-nav { margin-top: 1rem; display: flex; flex-wrap: wrap; gap: 0.4rem; }
.header-nav a {
  font-size: 0.8rem; font-weight: 600; text-decoration: none;
  color: rgba(255,255,255,0.88);
  border: 1px solid rgba(255,255,255,0.22);
  background: rgba(255,255,255,0.07);
  border-radius: 99px; padding: 0.25rem 0.8rem;
  transition: background 0.15s, border-color 0.15s;
}
.header-nav a:hover { background: rgba(255,255,255,0.16); border-color: rgba(255,255,255,0.4); color: #fff; }
.header-nav a:first-child {
  background: rgba(255,255,255,0.16); border-color: rgba(255,255,255,0.45);
}

/* ── Page ────────────────────────────────────────────────────────────────── */

.page-main {
  max-width: 1480px; margin: 0 auto;
  padding: 1.5rem 1.5rem 4rem;
  display: flex; flex-direction: column; gap: 1.1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

/* ── How to read ─────────────────────────────────────────────────────────── */

.howto {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--gold);
  border-radius: var(--radius);
  padding: 1rem 1.25rem 1.1rem;
  box-shadow: var(--shadow-card);
}
.howto h2 {
  font-size: 0.7rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.09em; color: var(--text-muted); margin-bottom: 0.7rem;
}
.howto-steps {
  list-style: none; display: grid; gap: 0.7rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.howto-steps li { display: flex; gap: 0.6rem; font-size: 0.875rem; line-height: 1.45; }
.howto-num {
  flex: 0 0 auto; width: 22px; height: 22px; margin-top: 0.1rem;
  border-radius: 50%; background: var(--green-pale); color: var(--green-dark);
  font-size: 0.8rem; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
}
.howto em { font-style: italic; }

/* ── Controls ────────────────────────────────────────────────────────────── */

.controls {
  display: flex; flex-wrap: wrap; align-items: flex-start; gap: 1.5rem;
  padding: 0.9rem 1.1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}
.control-block { display: flex; flex-direction: column; gap: 0.4rem; min-width: 0; }
.control-search { flex: 1 1 240px; max-width: 320px; }

.control-label {
  font-size: 0.66rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.09em; color: var(--text-muted);
}

.btn-group { display: flex; gap: 0.4rem; }
.seg-btn {
  padding: 0.4rem 0.85rem; border: 2px solid var(--border); border-radius: var(--radius-sm);
  background: var(--surface); color: var(--text);
  font-family: inherit; font-size: 0.85rem; font-weight: 700; cursor: pointer;
  line-height: 1.25; text-align: left;
  transition: border-color 0.15s, background 0.15s, color 0.15s, box-shadow 0.15s;
}
.seg-btn small {
  display: block; font-weight: 500; font-size: 0.68rem;
  color: var(--text-muted); margin-top: 0.1rem;
}
.seg-btn:hover { border-color: var(--green-light); background: #f5fbf7; }
.seg-btn.selected {
  border-color: var(--green); background: #edf7f1; color: var(--green-dark);
  box-shadow: 0 0 0 3px rgba(45,106,79,0.10);
}
.seg-btn.selected small { color: var(--green-mid); }

.search-wrap { position: relative; display: flex; align-items: center; }
.search-wrap input {
  flex: 1; min-width: 0; font-family: inherit; font-size: 0.9rem;
  padding: 0.5rem 4.6rem 0.5rem 0.75rem;
  border: 2px solid var(--border); border-radius: var(--radius-sm);
  background: var(--surface); color: var(--text); outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.search-wrap input:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgba(45,106,79,0.12); }
.search-wrap input::placeholder { color: #aac0b4; }
.search-count {
  position: absolute; right: 0.7rem; font-size: 0.7rem;
  color: var(--text-muted); pointer-events: none;
}

.toggle {
  display: inline-flex; align-items: center; gap: 0.45rem;
  font-size: 0.84rem; cursor: pointer; padding: 0.4rem 0;
}
.toggle input { width: 15px; height: 15px; accent-color: var(--green); cursor: pointer; }

/* ── Readout ─────────────────────────────────────────────────────────────── */

.readout {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.35rem 0.8rem;
  min-height: 2.9rem;
  padding: 0.6rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-soft);
  background: #fbfdfc;
  font-size: 0.85rem; line-height: 1.5;
}
.readout.is-row { border-color: var(--green-light); background: #f4faf6; }
.readout.is-col { border-color: color-mix(in srgb, var(--accent) 35%, #fff); background: #faf6fe; }
.readout-hint, .readout-note { color: var(--text-muted); font-size: 0.82rem; }
.readout-note { font-style: italic; }
.readout-lead { font-weight: 700; white-space: nowrap; }
.readout-lead code {
  background: var(--green-dark); color: #fff;
  padding: 0.08rem 0.4rem; border-radius: 4px;
  font-size: 0.8rem; margin-right: 0.35rem;
}
.readout.is-col .readout-lead code { background: var(--accent); }
.readout-body { color: var(--text-muted); }
.readout-body code {
  font-size: 0.76rem; padding: 0.05rem 0.3rem; border-radius: 3px;
  background: rgba(45,106,79,0.09); color: var(--green-dark);
}
.readout-body code.t-extra,
.readout-body code.t-gated {
  background: color-mix(in srgb, var(--accent) 12%, #fff); color: var(--accent);
}
.readout-body code.t-gated { border: 1px dashed color-mix(in srgb, var(--accent) 45%, #fff); }
.readout-plus { color: var(--accent); font-weight: 800; margin: 0 0.1rem; }

/* ── Matrix ──────────────────────────────────────────────────────────────── */

.matrix-card { overflow: hidden; }
.card-head { padding: 0.9rem 1.1rem 0.7rem; }
.card-head h2 { font-size: 1rem; font-weight: 700; color: var(--green-dark); }
.card-sub { font-size: 0.78rem; color: var(--text-muted); margin-top: 0.15rem; }

.matrix-scroll {
  overflow: auto;
  max-height: min(74vh, 900px);
  border-top: 1px solid var(--border-soft);
}
.matrix-inner { position: relative; width: max-content; }
.loading { padding: 3rem 1rem; color: var(--text-muted); }

/* Fixed layout needs a real width, or the group-row colspans widen the columns
   under them and the cells stop being square. */
.matrix {
  border-collapse: separate; border-spacing: 0; table-layout: fixed;
  width: calc(var(--rowhead-w) + var(--cols) * var(--cell-w));
}
.matrix col.col-rowhead { width: var(--rowhead-w); }
.matrix col.col-cell { width: var(--cell-w); }

/* Column headers — two sticky bands: group names, then tags. */
.matrix thead th {
  position: sticky; z-index: 3;
  background: var(--surface);
}
.matrix .group-row th { top: 0; height: var(--grouprow-h); }
.matrix .tag-row th { top: var(--grouprow-h); height: var(--colhead-h); }

.group-head {
  font-size: 0.6rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.05em; color: var(--text-muted);
  border-bottom: 1px solid var(--border-soft);
  border-left: 1px solid var(--border-soft);
  padding: 0 0.25rem; overflow: hidden;
}
/* Narrow groups (two or three tags) can't fit their name — clip it rather than
   let it push the columns out of square; the full name is on the title. */
.group-head span {
  display: block; white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis;
}

.col-head {
  width: var(--cell-w); min-width: var(--cell-w); max-width: var(--cell-w);
  padding: 0 0 0.3rem; vertical-align: bottom;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
}
.col-head-text {
  writing-mode: vertical-rl; transform: rotate(180deg);
  font: 600 10.5px/1.1 var(--font-mono);
  color: var(--text-muted); letter-spacing: 0.02em;
  white-space: nowrap; text-align: left;
  transition: color 0.12s;
}
.col-head:hover .col-head-text,
.col-head.is-focus .col-head-text { color: var(--accent); font-weight: 800; }
.col-head.is-selected .col-head-text { color: var(--accent); font-weight: 800; }
.col-head.is-match .col-head-text { color: var(--green-dark); font-weight: 800; }
.col-head.is-dim .col-head-text { opacity: 0.35; }

.corner {
  left: 0; z-index: 5 !important;
  width: var(--rowhead-w); min-width: var(--rowhead-w);
  text-align: left; padding: 0 0.7rem 0.4rem;
  vertical-align: bottom;
  font-size: 0.64rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  border-right: 1px solid var(--border-soft);
}
.corner-group { border-bottom: 1px solid var(--border-soft); }

/* Row headers */
.matrix tbody th.row-head {
  position: sticky; left: 0; z-index: 2;
  background: var(--surface);
  width: var(--rowhead-w); min-width: var(--rowhead-w);
  height: var(--cell-h);
  text-align: left; padding: 0 0.7rem;
  border-right: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
  font-weight: 500; font-size: 0.78rem;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  cursor: pointer;
}
.row-head code {
  display: inline-block; min-width: 3.4em;
  font-size: 0.74rem; font-weight: 700; color: var(--green-dark);
}
.row-name { color: var(--text-muted); }
.row-head.is-focus, tbody tr.is-focus th.row-head { background: #eaf5ee; }
.row-head.is-focus code, tbody tr.is-focus th.row-head code { color: var(--green-dark); }
/* Selecting also sets is-focus, and the focus rule above is the more specific
   one — so the selected styles have to match its specificity or the row ends up
   with white text on the pale focus background. */
tbody tr th.row-head.is-selected { background: var(--green-dark); }
tbody tr th.row-head.is-selected code,
tbody tr th.row-head.is-selected .row-name { color: #fff; }
.row-head.is-match code { text-decoration: underline; text-decoration-color: var(--gold); text-decoration-thickness: 2px; }

/* The cell spans the whole table, so sticking the cell does nothing — its text
   would scroll away to the left. Stick the label inside it instead. */
.row-group th {
  height: 26px; text-align: left; padding: 0.4rem 0 0.15rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border-soft);
}
.row-group th span {
  position: sticky; left: 0; display: inline-block;
  padding: 0 0.7rem;
  font-size: 0.62rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--text-muted);
}

/* Cells */
.matrix td.cell {
  width: var(--cell-w); min-width: var(--cell-w);
  height: var(--cell-h);
  padding: 0; text-align: center; vertical-align: middle;
  border-bottom: 1px solid var(--border-soft);
  position: relative;
}
tbody tr:hover td.cell, tbody tr.is-focus td.cell { background: rgba(45,106,79,0.05); }
tbody tr.is-dim { opacity: 0.32; }

/* Stacking order, low to high: column crosshair (0) · marks (1) · sticky row
   header (2) · sticky column headers (3) · the corner (5). Marks have to clear
   the crosshair but stay under the row header, or they show through it once the
   grid is scrolled sideways. */
.mark {
  display: inline-block; width: 13px; height: 13px; border-radius: 3px;
  vertical-align: middle;
  position: relative; z-index: 1;
}
.is-ancestry .mark { background: var(--fill); }
.is-self .mark {
  background: var(--fill);
  box-shadow: inset 0 0 0 2px var(--gold);
}
/* Shape carries the distinction as well as colour: ancestry is a square, a tag
   from another branch is a circle. */
.is-extra .mark { background: var(--accent); border-radius: 50%; }
.is-gated .mark {
  border-radius: 50%;
  background: transparent;
  box-shadow: inset 0 0 0 2px var(--accent);
}
/* Three readable states, not two: off at this type (faint outline), on but only
   because of the type (a solid ring with a hollow centre), and unconditional (the
   solid circle above). */
.is-gated.is-ghost .mark {
  box-shadow: inset 0 0 0 1.5px color-mix(in srgb, var(--accent) 38%, #fff);
}
.is-gated.is-on .mark {
  background: var(--accent);
  box-shadow: inset 0 0 0 3px #fff;
}

/* Column crosshair — one moved element instead of a class on ~2000 cells. */
.col-crosshair {
  position: absolute; top: 0; z-index: 0;
  background: color-mix(in srgb, var(--accent) 9%, transparent);
  border-left: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  border-right: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  pointer-events: none;
}

/* ── Legend ──────────────────────────────────────────────────────────────── */

.legend {
  display: flex; flex-wrap: wrap; gap: 0.4rem 1.75rem;
  padding: 0.7rem 1.1rem 0.85rem;
  border-top: 1px solid var(--border-soft);
  background: #fbfdfc;
  font-size: 0.74rem; color: var(--text-muted);
}
.legend-group { display: flex; align-items: center; flex-wrap: wrap; gap: 0.5rem; }
.legend-title {
  font-size: 0.63rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.09em;
}
.legend-item { display: inline-flex; align-items: center; gap: 0.35rem; }
.legend-note { font-style: italic; }
.lg { width: 13px; height: 13px; border-radius: 3px; flex: 0 0 auto; }
.lg-ancestry { background: var(--green-mid); }
.lg-self { background: var(--green-mid); box-shadow: inset 0 0 0 2px var(--gold); }
.lg-extra { background: var(--accent); border-radius: 50%; }
.lg-gated {
  border-radius: 50%; background: transparent;
  box-shadow: inset 0 0 0 1.5px color-mix(in srgb, var(--accent) 45%, #fff);
}

/* ── Detail ──────────────────────────────────────────────────────────────── */

.detail-card { padding: 1.1rem 1.25rem 1.3rem; }
.detail-empty h2, .detail-head h2 {
  font-size: 1.05rem; font-weight: 700; color: var(--green-dark); line-height: 1.3;
}
.detail-empty p { font-size: 0.86rem; margin-top: 0.4rem; max-width: 72ch; line-height: 1.55; }
.detail-empty strong { color: var(--green-dark); }

.detail-kind {
  display: inline-block; font-size: 0.6rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-muted);
  margin-bottom: 0.2rem;
}
.detail-head h2 code {
  background: var(--green-dark); color: #fff;
  padding: 0.05rem 0.4rem; border-radius: 5px; font-size: 0.9rem; margin-right: 0.35rem;
}
.detail-meta { font-size: 0.78rem; color: var(--text-muted); margin-top: 0.15rem; }
.detail-meta code { font-size: 0.74rem; }

.detail-cols {
  display: grid; gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  margin-top: 1rem;
}
.detail-cols h3 {
  font-size: 0.65rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.09em; color: var(--text-muted); margin-bottom: 0.4rem;
}
.detail-note { font-size: 0.78rem; line-height: 1.5; margin-top: 0.4rem; color: var(--text); }
.detail-note code { font-size: 0.73rem; color: var(--text-muted); }
.detail-foot { font-size: 0.75rem; color: var(--text-muted); line-height: 1.45; margin-top: 0.4rem; }
.detail-foot code { font-size: 0.72rem; }

.chip-row { display: flex; flex-wrap: wrap; gap: 0.28rem; }
.chip {
  display: inline-flex; text-decoration: none;
  border: 1.5px solid var(--border); border-radius: 6px;
  padding: 0.08rem 0.4rem; background: var(--surface);
  transition: border-color 0.12s, background 0.12s;
}
.chip code { font-size: 0.74rem; font-weight: 700; color: var(--text); }
.chip:hover { border-color: var(--green); background: #f2f9f5; }
.chip.is-ancestry { border-color: var(--green-pale); background: #f4faf6; }
.chip.is-ancestry code { color: var(--green-dark); }
.chip.is-self { border-color: var(--green-dark); background: var(--green-dark); }
.chip.is-self code { color: #fff; }
.chip.is-extra { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, #fff); }
.chip.is-extra code { color: var(--accent); }
.chip.is-gated { border-color: var(--accent); border-style: dashed; }
.chip.is-gated code { color: var(--accent); }

.reach-group { margin-bottom: 0.55rem; }
.reach-label {
  display: block; font-size: 0.68rem; font-weight: 700;
  color: var(--text-muted); margin-bottom: 0.2rem;
}

/* ── Footer ──────────────────────────────────────────────────────────────── */

.page-footer {
  font-size: 0.78rem; color: var(--text-muted); line-height: 1.5;
  text-align: center; padding-top: 0.5rem;
}

/* ── Responsive ──────────────────────────────────────────────────────────── */

/* On a phone the row header gives up its prose and keeps only the tag, so the
   grid itself gets most of the width. */
@media (max-width: 720px) {
  :root { --rowhead-w: 74px; }
  .page-main { padding: 1rem 0.85rem 3rem; }
  .row-name { display: none; }
  .corner-text { display: none; }
  .matrix-scroll { max-height: none; }
  .detail-cols { gap: 1rem; }
}

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