/* ===========================================================================
   music.css — genre dashboard. Layered on top of home.css; inherits every
   token from its :root. Nothing here redefines a base component, it only adds
   the chart surfaces.

   Chart colours are NOT hand-picked. They were validated with the palette
   checker (OKLCH lightness band, chroma floor, protan/deutan separation,
   normal-vision floor, contrast vs the paper surface) and all six checks pass
   on both --paper and --paper-2. Re-run the validator before changing any of
   them:
     node scripts/validate_palette.js "<hex,...>" --mode light --surface "#f7f3ec"
   =========================================================================== */

:root {
  /* Categorical — fixed order, assigned in sequence, never cycled.
     Worst adjacent CVD ΔE 14.8, normal-vision 21.1, all >= 3:1 contrast. */
  --cat-1: #b4490f; /* rust — the site accent, so charts feel native */
  --cat-2: #3f4f8f; /* indigo */
  --cat-3: #6b8f21; /* olive-green */
  --cat-4: #a02d5e; /* plum */
  --cat-5: #a97400; /* ochre */
  --cat-6: #0b7d9e; /* teal-blue */

  /* Sequential rust ramp — monotone lightness, light end clears 2:1 on paper. */
  --seq-1: #d69f79;
  --seq-2: #c58353;
  --seq-3: #b3652c;
  --seq-4: #a14c11;
  --seq-5: #88370b;

  /* Everything past the token ceiling folds in here. Never a generated hue. */
  --cat-other: #99917f;
  --deemph: #cfc7b6;
}

/* ---------- page header ---------- */

/* This page has no .hero, so it supplies its own clearance for the fixed nav. */
.music-hero {
  padding: 150px 0 40px;
}

.music-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 5.2vw, 3.4rem);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.12;
  margin: 0.7rem 0 0;
  max-width: 16ch;
}

.music-lede {
  color: var(--muted);
  max-width: 640px;
  margin: 1.3rem 0 0;
  font-size: 1.05rem;
}

.music-lede a {
  color: var(--rust);
  border-bottom: 1px solid rgba(180, 73, 15, 0.3);
}

.music-lede a:hover { border-bottom-color: var(--rust); }

.music-hero .rotation-bar { max-width: 640px; }

.music-empty {
  margin-top: 2rem;
  padding: 1.1rem 1.3rem;
  border: 1px dashed var(--hairline);
  border-radius: 14px;
  background: var(--paper-2);
  color: var(--muted);
  max-width: 640px;
}

.music-empty p { margin: 0; font-size: 0.94rem; }

.music-empty code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background: var(--paper-3);
  padding: 0.1rem 0.35rem;
  border-radius: 5px;
}

/* ---------- hero figure ---------- */

.hero-figure {
  display: flex;
  align-items: baseline;
  gap: 1.6rem;
  margin: 2.6rem 0 1.6rem;
  flex-wrap: wrap;
}

.hero-figure-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(3.4rem, 9vw, 5.6rem);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--rust);
  font-variant-numeric: tabular-nums;
}

.hero-figure-gloss {
  color: var(--muted);
  max-width: 460px;
  margin: 0;
  font-size: 0.98rem;
  flex: 1;
  min-width: 260px;
}

.hero-figure-gloss strong {
  color: var(--ink);
  font-weight: 600;
}

.music-body .hero-stats { margin-top: 1.4rem; }

/* ---------- chart surfaces ---------- */

.section:first-of-type { padding-top: 3.5rem; }

.viz-card {
  border: 1px solid var(--hairline);
  border-radius: 16px;
  background: var(--paper-2);
  padding: 1.4rem 1.5rem 1.2rem;
}

.viz-figure { margin: 0; }

.viz-holder {
  position: relative;
  width: 100%;
  height: 560px;
}

/* Charts whose height is computed from row count rather than fixed. */
.viz-holder--auto { height: auto; }

.viz-holder svg { display: block; width: 100%; overflow: visible; }

.viz-caption {
  margin-top: 0.9rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--hairline-soft);
  font-size: 0.84rem;
  color: var(--muted);
}

/* ---------- legends + toolbar ---------- */

.viz-toolbar {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.1rem;
}

.viz-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  flex: 1;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  font-family: var(--font-body);
  font-size: 0.78rem;
  color: var(--muted);
  background: var(--paper);
  border: 1px solid var(--hairline-soft);
  border-radius: 999px;
  padding: 0.28rem 0.7rem;
  cursor: pointer;
  transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease;
}

.viz-legend--static .legend-item { cursor: default; }

.legend-item:hover,
.legend-item[aria-pressed="true"] {
  border-color: var(--hairline);
  color: var(--ink);
  background: var(--paper-3);
}

.legend-swatch {
  width: 10px;
  height: 10px;
  border-radius: 3px;
  flex-shrink: 0;
  background: var(--deemph);
}

.viz-reset {
  font-family: var(--font-body);
  font-size: 0.78rem;
  color: var(--rust);
  background: none;
  border: 0;
  cursor: pointer;
  padding: 0.28rem 0;
}

.viz-reset:hover { color: var(--rust-deep); }

/* ---------- axes + marks ---------- */

.axis-label,
.tick-label {
  font-family: var(--font-body);
  font-size: 11px;
  fill: var(--muted);
}

.tick-label--strong { fill: var(--ink); font-weight: 500; }

.value-label {
  font-family: var(--font-mono);
  font-size: 11px;
  fill: var(--muted);
  font-variant-numeric: tabular-nums;
}

.grid-line { stroke: var(--hairline-soft); stroke-width: 1; }
.axis-line { stroke: var(--hairline); stroke-width: 1; }

/* 2px surface gap between adjacent fills, per the mark spec. */
.bar { stroke: var(--paper-2); stroke-width: 2; }

.node-circle { stroke: var(--paper-2); stroke-width: 1.5; }
.link-line { stroke: var(--hairline); fill: none; }

.treemap-cell rect { stroke: var(--paper-2); stroke-width: 2; }
.treemap-label {
  font-family: var(--font-body);
  font-size: 11px;
  pointer-events: none;
}

.slope-line { fill: none; stroke-width: 2; }
.slope-dot { stroke: var(--paper-2); stroke-width: 2; }

/* Soft backing for each family cluster. Kept very light — overlapping hulls
   at higher opacity turn the whole graph into grey mush. */
.hull { opacity: 0.055; stroke-width: 16px; stroke-linejoin: round; }

.cluster-label {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  fill: var(--ink);
  pointer-events: none;
  paint-order: stroke;
  stroke: var(--paper-2);
  stroke-width: 3px;
  stroke-linejoin: round;
}

/* ---------- tooltip ---------- */

.viz-tooltip {
  position: fixed;
  z-index: 60;
  pointer-events: none;
  background: var(--ink);
  color: var(--paper-2);
  border-radius: 10px;
  padding: 0.55rem 0.75rem;
  font-size: 0.82rem;
  line-height: 1.45;
  max-width: 260px;
  box-shadow: 0 8px 24px rgba(33, 29, 24, 0.22);
}

.viz-tooltip strong {
  font-family: var(--font-display);
  font-weight: 600;
  display: block;
}

.viz-tooltip .tt-meta {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  opacity: 0.78;
  display: block;
  margin-top: 0.15rem;
}

/* ---------- genre detail panel ---------- */

.genre-panel {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 70;
  width: 320px;
  max-height: 68vh;
  overflow-y: auto;
  background: var(--paper-2);
  border: 1px solid var(--hairline);
  border-radius: 16px;
  box-shadow: 0 18px 44px rgba(33, 29, 24, 0.18);
  padding: 1.2rem 1.3rem 1.3rem;
}

.genre-panel-close {
  position: absolute;
  top: 0.6rem;
  right: 0.7rem;
  font-size: 1.2rem;
  line-height: 1;
  color: var(--faint);
  background: none;
  border: 0;
  cursor: pointer;
  padding: 0.3rem 0.4rem;
  border-radius: 6px;
}

.genre-panel-close:hover { color: var(--ink); background: var(--paper-3); }

.genre-panel-kicker {
  font-family: var(--font-body);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--rust);
  margin-bottom: 0.4rem;
}

.genre-panel-name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 0.7rem;
  padding-right: 1.2rem;
  line-height: 1.2;
}

.genre-panel-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  font-size: 0.8rem;
  color: var(--muted);
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--hairline-soft);
}

.genre-panel-stats strong {
  font-family: var(--font-mono);
  color: var(--ink);
  font-weight: 700;
}

.genre-panel-label {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
  margin: 0.95rem 0 0.55rem;
}

.genre-panel-chips { display: flex; flex-wrap: wrap; gap: 0.35rem; }

.genre-panel-chips .chip { font-size: 0.76rem; padding: 0.26rem 0.66rem; }

/* Neighbouring genres are clickable — they re-open the panel on that genre. */
.genre-panel-chips button.chip {
  cursor: pointer;
  font-family: var(--font-body);
  color: var(--muted);
}

.genre-panel-chips button.chip:hover { color: var(--rust); border-color: var(--rust); }

.node-circle, .treemap-cell { cursor: pointer; }
.data-table tbody tr { cursor: pointer; }
.data-table tbody tr.is-selected td { background: var(--paper-3); }

@media (max-width: 640px) {
  .genre-panel {
    right: 12px;
    left: 12px;
    bottom: 12px;
    width: auto;
    max-height: 56vh;
  }
}

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

.table-wrap { max-height: 520px; overflow: auto; border-radius: 10px; }

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.data-table thead th {
  position: sticky;
  top: 0;
  background: var(--paper-2);
  text-align: left;
  border-bottom: 1px solid var(--hairline);
  padding: 0;
  z-index: 1;
}

.data-table thead th button {
  font-family: var(--font-body);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  background: none;
  border: 0;
  padding: 0.7rem 0.8rem;
  cursor: pointer;
  width: 100%;
  text-align: inherit;
}

.data-table thead th button:hover { color: var(--rust); }
.data-table thead th[aria-sort] button { color: var(--ink); }

.data-table thead th[aria-sort="ascending"] button::after { content: " ↑"; }
.data-table thead th[aria-sort="descending"] button::after { content: " ↓"; }

.data-table td {
  padding: 0.5rem 0.8rem;
  border-bottom: 1px solid var(--hairline-soft);
  color: var(--muted);
}

.data-table td:first-child { color: var(--ink); }
.data-table .num { text-align: right; font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.data-table tbody tr:hover td { background: var(--paper); }

.family-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  margin-right: 0.45rem;
  vertical-align: baseline;
  background: var(--deemph);
}

.table-note {
  margin: 0.9rem 0 0;
  font-size: 0.82rem;
  color: var(--faint);
}

/* ---------- method ---------- */

.method-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
}

.method-stats {
  grid-template-columns: repeat(2, 1fr);
  margin-bottom: 1.3rem;
}

.method-stats .stat { padding: 1rem 1.1rem; }
.method-stats .stat-num { font-size: 1.5rem; color: var(--rust); }
.method-stats .stat-label { font-size: 0.76rem; line-height: 1.4; }

.provenance-line {
  font-size: 0.84rem;
  color: var(--faint);
  border-top: 1px solid var(--hairline-soft);
  padding-top: 0.9rem;
  margin: 0 0 1.1rem;
}

.method-foot {
  margin-top: 2.2rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--hairline-soft);
  color: var(--muted);
  font-size: 0.88rem;
}

.method-foot code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink);
}

.method-foot a { color: var(--rust); font-weight: 500; }
.method-foot a:hover { color: var(--rust-deep); }

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

/* ---------- responsive — match home.css breakpoints exactly ---------- */

/* NB: these must exclude --auto. A bare `.viz-holder { height: … }` inside a
   media query has the same specificity as `.viz-holder--auto` but comes later
   in the file, so it wins — which clamps the auto-height charts and makes their
   SVGs overflow on top of the caption. */

@media (max-width: 1024px) {
  .method-grid { grid-template-columns: repeat(2, 1fr); }
  .viz-holder:not(.viz-holder--auto) { height: 480px; }
}

/* 880px is the nav switchover in home.css — do not diverge from it. */
@media (max-width: 880px) {
  .music-hero { padding: 135px 0 32px; }
  .viz-holder:not(.viz-holder--auto) { height: 460px; }
  .viz-card { padding: 1.1rem 1.1rem 1rem; }
  .hero-figure { gap: 1.1rem; margin: 2rem 0 1.2rem; }
}

@media (max-width: 640px) {
  .method-grid { grid-template-columns: 1fr; }
  .method-stats { grid-template-columns: 1fr; }
  /* The constellation needs MORE room on a narrow screen, not less — 16
     clusters in 390px is already tight. */
  .viz-holder:not(.viz-holder--auto) { height: 540px; }
  .hero-figure-gloss { min-width: 0; }
  .table-wrap { max-height: 420px; }
  .viz-card { padding: 0.9rem 0.8rem 0.9rem; }
}

@media (prefers-reduced-motion: reduce) {
  .legend-item { transition: none; }
}

/* ---------- discovery ---------- */

.disc-list-head { margin-bottom: 1.1rem; }

.disc-list-head h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0 0 0.3rem;
}

.disc-list-head p { margin: 0; font-size: 0.86rem; color: var(--muted); }

.disc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--hairline-soft);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  overflow: hidden;
}

.disc-item {
  background: var(--paper-2);
  padding: 0.85rem 1rem;
  display: block;
  transition: background 0.16s ease;
}

.disc-item:hover { background: var(--paper); }

.disc-item-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--ink);
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
}

.disc-item-name .arrow { color: var(--rust); font-size: 0.8rem; }

.disc-item-via {
  font-size: 0.76rem;
  color: var(--muted);
  margin-top: 0.2rem;
  line-height: 1.45;
}

/* Engine badges — the three validated categorical slots, one per engine. */
.disc-engines { display: flex; gap: 0.28rem; margin-top: 0.45rem; }

.disc-dot {
  width: 8px; height: 8px; border-radius: 2px;
  background: var(--deemph);
}

.disc-dot--lastfm { background: var(--cat-1); }
.disc-dot--deezer { background: var(--cat-2); }
.disc-dot--listenbrainz { background: var(--cat-3); }

.disc-item--consensus { background: var(--paper-3); }

@media (max-width: 880px) { .disc-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .disc-grid { grid-template-columns: 1fr; } }

.disc-solo { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.3rem; }

.disc-solo-col h4 {
  font-family: var(--font-body);
  font-size: 0.72rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  margin: 0 0 0.2rem;
  display: flex;
  align-items: center;
  gap: 0.42rem;
  color: var(--ink);
}

.disc-solo-col .blurb {
  font-size: 0.76rem;
  color: var(--faint);
  margin: 0 0 0.75rem;
}

.disc-solo-col ol { list-style: none; margin: 0; padding: 0; }

.disc-solo-col li {
  border-top: 1px solid var(--hairline-soft);
  padding: 0.5rem 0;
  font-size: 0.9rem;
}

.disc-solo-col li a { color: var(--ink); font-weight: 500; }
.disc-solo-col li a:hover { color: var(--rust); }
.disc-solo-col li span { display: block; font-size: 0.74rem; color: var(--muted); }

@media (max-width: 880px) { .disc-solo { grid-template-columns: 1fr; gap: 1.6rem; } }