/* ═══════════════════════════════════════════════════════
   BWV 565 · Musical Representations
   ═══════════════════════════════════════════════════════ */

/* ── Variables ────────────────────────────────────────── */
:root {
  --bg:           #F9F9F7;
  --bg-card:      #EBEBEA;
  --bg-elevated:  #FFFFFF;
  --bg-code:      #111111;
  --text:         #111111;
  --text-muted:   #555555;
  --text-dim:     #999999;
  --accent:       #CC2200;
  --accent-glow:  rgba(204,34,0,0.08);
  --border:       #CCCCCC;
  --border-bright:#888888;

  --cat-sonido:    #f97316;
  --cat-senal:     #0077cc;
  --cat-partitura: #7730bb;
  --cat-evento:    #1a8a3e;
  --cat-fuente:    #cc2200;
  --cat-codigo:    #cc8800;
  --cat-braille:   #aa1177;

  --axis-h: 92px;
  --player-h: 58px;
  --r: 0px;
}

/* ── Reset ────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', system-ui, -apple-system, sans-serif;
  line-height: 1.7;
  min-height: 100vh;
  padding-bottom: calc(var(--player-h) + 24px);
}

/* ── Typography ──────────────────────────────────────── */
h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.05;
  text-transform: uppercase;
}
h1 em { color: var(--accent); font-style: normal; }
h2 { font-size: clamp(1.1rem, 2.5vw, 1.6rem); font-weight: 700; letter-spacing: 0; }
code { font-family: 'JetBrains Mono', 'Cascadia Code', monospace; font-size: 0.875em; }
a { color: var(--accent); text-decoration: none; }

/* ── HEADER ──────────────────────────────────────────── */
#site-header {
  padding: 40px 24px 36px;
  text-align: center;
  background: #111111;
  border-bottom: 6px solid var(--accent);
  position: relative;
}
#site-header::before {
  display: none;
}
/* Text on dark header */
#site-header h1           { color: #F9F9F7; }
#site-header .piece-meta-top  { color: #777777; }
#site-header .piece-meta-top em { color: #999999; }
#site-header .site-tagline    { color: #777777; }
#site-header .site-tagline strong { color: #F9F9F7; }
.header-inner { position: relative; max-width: 800px; margin: 0 auto; }
.header-top-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.piece-meta-top {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0;
}
.piece-meta-top em { font-style: italic; text-transform: none; letter-spacing: 0; }
#about-btn {
  flex-shrink: 0;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 4px 10px;
  border: 1px solid #444;
  border-radius: 0;
  background: transparent;
  color: #777;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
#about-btn:hover,
#about-btn[aria-expanded="true"] {
  color: var(--accent);
  border-color: var(--accent);
}
/* About card */
#about-card {
  max-width: 400px;
  margin: 24px auto 0;
  background: #1a1a1a;
  border: 2px solid #333;
  border-radius: 0;
  padding: 20px 24px;
  text-align: left;
}
#about-card[hidden] { display: none; }
.about-author {
  font-size: 0.9rem;
  color: #cccccc;
  margin-bottom: 12px;
}
.about-author a { color: var(--accent); text-decoration: underline; }
.about-links {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}
.about-links a {
  font-size: 0.82rem;
  color: #888888;
  text-decoration: none;
  transition: color 0.15s;
}
.about-links a:hover { color: var(--accent); }
.about-credit {
  font-size: 0.72rem;
  color: #555555;
  margin-bottom: 0;
  letter-spacing: 0.05em;
}
.site-tagline {
  margin-top: 20px;
  font-size: 1.05rem;
  color: var(--text-muted);
}
.site-tagline strong { color: var(--text); }

/* ── AXIS ─────────────────────────────────────────────── */
#axis {
  position: sticky;
  top: 0;
  z-index: 100;
  min-height: var(--axis-h);
  padding: 7px 20px 5px;
  background: rgba(249,249,247,0.97);
  backdrop-filter: blur(16px);
  border-bottom: 2px solid #111111;
}

/* Top row: title + category filters */
.axis-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 4px;
}

.axis-title {
  font-size: 0.57rem;
  font-weight: 500;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--text-dim);
  white-space: nowrap;
  flex-shrink: 0;
}

/* Category filter buttons */
.axis-cats {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.cat-filter-btn {
  font-size: 0.5rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  padding: 2px 6px;
  border-radius: 3px;
  border: 1px solid var(--border-bright);
  background: none;
  color: var(--text-dim);
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
  white-space: nowrap;
}
.cat-filter-btn[data-filter="sonido"]    { --fc: var(--cat-sonido); }
.cat-filter-btn[data-filter="senal"]     { --fc: var(--cat-senal); }
.cat-filter-btn[data-filter="partitura"] { --fc: var(--cat-partitura); }
.cat-filter-btn[data-filter="evento"]    { --fc: var(--cat-evento); }
.cat-filter-btn[data-filter="fuente"]    { --fc: var(--cat-fuente); }
.cat-filter-btn[data-filter="codigo"]    { --fc: var(--cat-codigo); }
.cat-filter-btn[data-filter="braille"]   { --fc: var(--cat-braille); }

.cat-filter-btn:hover,
.cat-filter-btn.active {
  color: var(--fc);
  border-color: var(--fc);
}
.cat-filter-btn.active {
  background: color-mix(in srgb, var(--fc) 12%, transparent);
}

/* Scrollable dots track */
.axis-scroll {
  overflow-x: auto;
  scrollbar-width: none;
}
.axis-scroll::-webkit-scrollbar { display: none; }

/* ── Filter behavior: toggle labels per category (multi-select) ── */

/* Per-category: show labels when that category is active (~= matches space-separated list) */
#axis[data-filter~="sonido"]    .axis-dot[data-cat="sonido"]    span { opacity: 1; }
#axis[data-filter~="senal"]     .axis-dot[data-cat="senal"]     span { opacity: 1; }
#axis[data-filter~="partitura"] .axis-dot[data-cat="partitura"] span { opacity: 1; }
#axis[data-filter~="evento"]    .axis-dot[data-cat="evento"]    span { opacity: 1; }
#axis[data-filter~="fuente"]    .axis-dot[data-cat="fuente"]    span { opacity: 1; }
#axis[data-filter~="codigo"]    .axis-dot[data-cat="codigo"]    span { opacity: 1; }
#axis[data-filter~="braille"]   .axis-dot[data-cat="braille"]   span { opacity: 1; }

#axis[data-filter~="sonido"]    .axis-dot[data-cat="sonido"]::before    { background: var(--cat-sonido);    transform: scale(1.5); }
#axis[data-filter~="senal"]     .axis-dot[data-cat="senal"]::before     { background: var(--cat-senal);     transform: scale(1.5); }
#axis[data-filter~="partitura"] .axis-dot[data-cat="partitura"]::before { background: var(--cat-partitura); transform: scale(1.5); }
#axis[data-filter~="evento"]    .axis-dot[data-cat="evento"]::before    { background: var(--cat-evento);    transform: scale(1.5); }
#axis[data-filter~="fuente"]    .axis-dot[data-cat="fuente"]::before    { background: var(--cat-fuente);    transform: scale(1.5); }
#axis[data-filter~="codigo"]    .axis-dot[data-cat="codigo"]::before    { background: var(--cat-codigo);    transform: scale(1.5); }
#axis[data-filter~="braille"]   .axis-dot[data-cat="braille"]::before   { background: var(--cat-braille);   transform: scale(1.5); }

/* Body: trunk + branches side by side */
.axis-body {
  display: flex;
  align-items: stretch;
  gap: 0;
}

/* Trunk: sonido + senal */
.axis-trunk {
  display: flex;
  align-items: center;
  gap: 0;
  flex-shrink: 0;
  position: relative;
}
/* Horizontal connector: trunk → fork */
.axis-trunk::after {
  content: '';
  display: block;
  width: 6px;
  height: 1px;
  background: #888888;
  flex-shrink: 0;
  align-self: center;
}

/* Vertical fork rail */
.axis-branches {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 2px;
  border-left: 1px solid #888888;
}

/* Each branch row */
.axis-branch {
  display: flex;
  align-items: center;
  gap: 0;
  position: relative;
}
/* Horizontal connector: fork → branch dots */
.axis-branch::before {
  content: '';
  display: block;
  width: 8px;
  height: 1px;
  background: #888888;
  flex-shrink: 0;
}

.branch-label {
  font-size: 0.52rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--text-dim);
  white-space: nowrap;
  flex-shrink: 0;
  padding-right: 4px;
}

/* Dots */
.axis-dot {
  position: relative;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 4px 5px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-dim);
  transition: color 0.2s;
  min-width: 36px;
}
.axis-dot::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--border-bright);
  transition: all 0.25s;
  position: relative;
  z-index: 1;
}
.axis-dot span {
  font-size: 0.52rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  white-space: nowrap;
  opacity: 0;
  transition: opacity 0.2s;
}
.axis-dot:hover span,
.axis-dot.active span { opacity: 1; }

.axis-dot:hover::before {
  transform: scale(1.4);
  background: var(--text-muted);
}
.axis-dot.active::before {
  transform: scale(1.6);
}
.axis-dot.active { color: currentColor; }

/* Category colors on dots */
.axis-dot[data-cat="sonido"].active::before    { background: var(--cat-sonido); }
.axis-dot[data-cat="senal"].active::before     { background: var(--cat-senal); }
.axis-dot[data-cat="partitura"].active::before { background: var(--cat-partitura); }
.axis-dot[data-cat="evento"].active::before    { background: var(--cat-evento); }
.axis-dot[data-cat="fuente"].active::before    { background: var(--cat-fuente); }
.axis-dot[data-cat="codigo"].active::before    { background: var(--cat-codigo); }
.axis-dot[data-cat="braille"].active::before   { background: var(--cat-braille); }

.axis-dot[data-cat="sonido"].active    { color: var(--cat-sonido); }
.axis-dot[data-cat="senal"].active     { color: var(--cat-senal); }
.axis-dot[data-cat="partitura"].active { color: var(--cat-partitura); }
.axis-dot[data-cat="evento"].active    { color: var(--cat-evento); }
.axis-dot[data-cat="fuente"].active    { color: var(--cat-fuente); }
.axis-dot[data-cat="codigo"].active    { color: var(--cat-codigo); }
.axis-dot[data-cat="braille"].active   { color: var(--cat-braille); }

/* ── FIXED PLAYER ────────────────────────────────────── */
#sticky-player {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: var(--player-h);
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 20px;
  background: rgba(17,17,17,0.97);
  backdrop-filter: blur(20px);
  border-top: 2px solid var(--accent);
}
.player-piece {
  font-size: 0.72rem;
  color: #888888;
  white-space: nowrap;
  font-weight: 500;
  letter-spacing: 0.04em;
}
.play-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
  background: none;
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s;
}
.play-btn:hover { background: var(--accent-glow); }
.play-btn svg { width: 16px; height: 16px; }
#mini-wave { flex: 1; height: 32px; }
.player-time {
  font-size: 0.75rem;
  font-family: 'JetBrains Mono', monospace;
  color: #888888;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 3px;
}
.time-sep { color: #444444; }

/* ── SECTIONS ─────────────────────────────────────────── */
.rep-section {
  border-bottom: 2px solid #111111;
  scroll-margin-top: var(--axis-h);
}
.section-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 72px 24px 64px;
}

/* Category left accent */
.rep-section[data-cat="sonido"]    { --cat-color: var(--cat-sonido); }
.rep-section[data-cat="senal"]     { --cat-color: var(--cat-senal); }
.rep-section[data-cat="partitura"] { --cat-color: var(--cat-partitura); }
.rep-section[data-cat="evento"]    { --cat-color: var(--cat-evento); }
.rep-section[data-cat="fuente"]    { --cat-color: var(--cat-fuente); }
.rep-section[data-cat="codigo"]    { --cat-color: var(--cat-codigo); }
.rep-section[data-cat="braille"]   { --cat-color: var(--cat-braille); }

/* Section header row */
.section-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.section-num {
  font-size: 3rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--accent);
  opacity: 1;
  line-height: 1;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}
.section-title-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
}
.section-ext {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.04em;
  order: -1;
  flex-shrink: 0;
}

/* Category badge — Bauhaus: yellow block with black border */
.cat-badge {
  font-size: 0.62rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 4px 9px;
  border-radius: 0;
  border: 2px solid #111111;
  background: #F5B800;
  color: #111111;
  flex-shrink: 0;
}
.cat-badge[data-cat="sonido"],
.cat-badge[data-cat="senal"],
.cat-badge[data-cat="partitura"],
.cat-badge[data-cat="evento"],
.cat-badge[data-cat="fuente"],
.cat-badge[data-cat="codigo"],
.cat-badge[data-cat="braille"] {
  color: #111111;
  border-color: #111111;
  background: #F5B800;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 760px;
  margin-bottom: 36px;
  line-height: 1.75;
}
.section-desc code { color: var(--accent); background: var(--bg-code); padding: 1px 5px; border-radius: 3px; }

/* Section content area */
.section-content {
  margin-bottom: 36px;
  border-radius: var(--r);
  overflow: hidden;
}

/* Section meta */
.section-meta {
  display: flex;
  align-items: flex-start;
  gap: 32px;
  padding: 20px 0;
  border-top: 2px solid #111111;
  flex-wrap: wrap;
}
.meta-list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 16px;
  font-size: 0.82rem;
}
.meta-list dt { color: var(--text-dim); font-weight: 500; white-space: nowrap; }
.meta-list dd { color: var(--text-muted); }

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border: 2px solid #111111;
  border-radius: 0;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: #F9F9F7;
  background: #1133BB;
  white-space: nowrap;
  transition: background 0.15s;
  margin-left: auto;
  flex-shrink: 0;
}
.download-btn:hover {
  background: #0022AA;
  color: #FFFFFF;
}

/* Tool links — open-in-editor row inside section-meta */
.tool-links {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  flex-basis: 100%;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.tool-links-label {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  white-space: nowrap;
  margin-right: 2px;
}
.tool-link {
  font-size: 0.68rem;
  padding: 2px 9px;
  border: 1px solid var(--border);
  border-radius: 0;
  color: var(--text-muted);
  text-decoration: none;
  font-family: 'JetBrains Mono', monospace;
  transition: color .15s, border-color .15s;
}
.tool-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ── AUDIO ────────────────────────────────────────────── */
#audio-player-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 24px;
}
.audio-simple-player {
  display: flex;
  justify-content: center;
  padding: 24px 0;
}
.audio-native {
  width: 100%;
  max-width: 480px;
  accent-color: var(--accent);
  border-radius: var(--r);
}
.audio-controls {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 16px;
}
.btn-play-section {
  padding: 8px 20px;
  border-radius: var(--r);
  border: 1px solid var(--accent);
  background: var(--accent-glow);
  color: var(--accent);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-play-section:hover { background: rgba(200,168,75,0.25); }
.audio-duration { font-size: 0.8rem; color: var(--text-dim); font-family: monospace; }

/* ── WAVEFORM EXACT ───────────────────────────────────── */
.waveform-exact-wrap {
  position: relative;
  border-radius: var(--r);
  border: 1px solid var(--border);
  overflow: hidden;
}
.wf-loading-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  background: #0d0d14;
  z-index: 2;
}
.wf-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-top: 1px solid var(--border);
  background: var(--bg-card);
}
.wf-btn {
  width: 28px; height: 28px;
  border: 1px solid var(--border-bright);
  border-radius: 4px;
  background: var(--bg-elevated);
  color: var(--accent);
  font-size: 1.2rem;
  line-height: 1;
  cursor: pointer;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
}
.wf-btn:hover { background: var(--accent-glow); }
.wf-btn[id*="yzoom"] { font-size: 0.7rem; font-weight: 600; font-family: 'JetBrains Mono', monospace; width: 32px; }
.wf-sep { color: var(--border-bright); padding: 0 2px; user-select: none; }
.wf-slider { flex: 1; accent-color: var(--cat-senal); cursor: pointer; }
.wf-hint { font-size: 0.7rem; color: var(--text-dim); white-space: nowrap; }
.inline-link { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
.inline-link:hover { color: #e8c870; }
.wf-info-bar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 5px 12px;
  border-top: 1px solid var(--border);
  background: var(--bg-card);
  overflow: hidden;
}
.wf-info-text, .wf-tooltip-text {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── SPECTROGRAM EXACT ────────────────────────────────── */
.spec-exact-wrap {
  position: relative;
  border-radius: var(--r);
  border: 1px solid var(--border);
  overflow: hidden;
}
.spec-loading-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  background: #0d0d14;
  z-index: 2;
}
.spec-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-top: 1px solid var(--border);
  background: var(--bg-card);
}
.spec-btn {
  width: 28px; height: 28px;
  border: 1px solid var(--border-bright);
  border-radius: 4px;
  background: var(--bg-elevated);
  color: var(--accent);
  font-size: 1.2rem;
  line-height: 1;
  cursor: pointer;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
}
.spec-btn:hover { background: var(--accent-glow); }
.spec-btn[id*="fzoom"] { font-size: 0.7rem; font-weight: 600; font-family: 'JetBrains Mono', monospace; width: 32px; }
.spec-sep { color: var(--border-bright); padding: 0 2px; user-select: none; }
.spec-slider { flex: 1; accent-color: var(--cat-senal); cursor: pointer; }
.spec-hint { font-size: 0.7rem; color: var(--text-dim); white-space: nowrap; }
.spec-info-bar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 5px 12px;
  border-top: 1px solid var(--border);
  background: var(--bg-card);
  overflow: hidden;
}
.spec-info-text, .spec-tooltip-text {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── PDF CONTAINER ────────────────────────────────────── */
.pdf-container {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
  text-align: center;
}
.pdf-scroll {
  max-height: 480px;
  overflow-y: auto;
  overflow-x: hidden;
  min-height: 200px;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  scrollbar-width: thin;
  scrollbar-color: var(--border-bright) transparent;
}
.pdf-container canvas {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}
.pdf-loading {
  position: absolute;
  color: var(--text-dim);
  font-size: 0.85rem;
}
.pdf-loading.done { display: none; }

/* ── SCAN ZOOM ────────────────────────────────────────── */
.scan-zoom-hint {
  position: absolute; bottom: 10px; right: 12px;
  padding: 3px 8px;
  background: rgba(0,0,0,0.68);
  color: #F9F9F7;
  font-size: 0.68rem;
  font-family: 'JetBrains Mono', monospace;
  border-radius: 3px;
  pointer-events: none;
  user-select: none;
}
.scan-zoom-info-bar {
  display: flex;
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-top: none;
  background: var(--bg-card);
  border-radius: 0 0 var(--r) var(--r);
}
.scan-zoom-info-text {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── IMAGES ──────────────────────────────────────────── */
.img-container {
  background: #fff;
  border-radius: var(--r);
  overflow-y: auto;
  overflow-x: hidden;
  text-align: center;
  padding: 24px;
  max-height: 480px;
  scrollbar-width: thin;
  scrollbar-color: #bbb transparent;
}
.score-img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}

/* ── OSMD (SHEET MUSIC) ───────────────────────────────── */
#osmd-container {
  background: #fff;
  border-radius: var(--r);
  overflow: hidden;
  padding: 20px;
  min-height: 200px;
  position: relative;
}
.content-loading {
  color: var(--text-dim);
  font-size: 0.85rem;
  text-align: center;
  padding: 40px;
}

/* ── MIDI ─────────────────────────────────────────────── */
.midi-player-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
  margin-bottom: 16px;
}
midi-player {
  display: block;
  --player-background: var(--bg-elevated);
  --player-link-color: var(--accent);
  --player-button-size: 36px;
  padding: 16px;
  border-bottom: 1px solid var(--border);
}
midi-visualizer {
  display: block;
  height: 180px;
  background: var(--bg-code);
  overflow: hidden;
}
midi-visualizer::part(note) {
  border-radius: 2px;
}

.midi-data-box {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
}
.midi-data-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
}
.midi-tab {
  padding: 6px 16px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-dim);
  cursor: pointer;
  transition: color .15s, border-color .15s;
}
.midi-tab.active    { color: var(--accent); border-bottom-color: var(--accent); }
.midi-tab:hover:not(.active) { color: var(--text); }

.midi-hex {
  padding: 16px 20px;
  max-height: 220px;
  overflow-x: auto;
  overflow-y: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  line-height: 1.8;
  color: var(--cat-codigo);
}

.hex-hl-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-top: 1px solid #333333;
  background: #1a1a1a;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  color: #888888;
}
.hex-hl-btn {
  padding: 2px 9px;
  border: 1px solid #444444;
  border-radius: 3px;
  background: transparent;
  color: #888888;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  cursor: pointer;
  transition: border-color .15s, color .15s;
}
.hex-hl-btn[data-range="mtrk"].on    { border-color: hsl(200 70% 55%); color: hsl(200 70% 55%); }
.hex-hl-btn[data-range="keysig"].on  { border-color: hsl(270 65% 65%); color: hsl(270 65% 65%); }
.hex-hl-btn[data-range="noteon"].on  { border-color: var(--accent);    color: var(--accent); }
.hex-hl-btn[data-range="noteoff"].on { border-color: hsl(38 95% 58%);  color: hsl(38 95% 58%); }
.hex-hl-btn[data-range="eot"].on     { border-color: hsl(0 70% 60%);   color: hsl(0 70% 60%); }
.hex-hl-btn[data-range="delta"].on   { border-color: hsl(210 70% 60%); color: hsl(210 70% 60%); }
.hex-hl-btn[data-range="status"].on  { border-color: hsl(300 60% 65%); color: hsl(300 60% 65%); }
.hex-hl-btn[data-range="noteid"].on  { border-color: hsl(160 75% 50%); color: hsl(160 75% 50%); }
.hex-hl-btn[data-range="veloc"].on   { border-color: hsl(20 90% 60%);  color: hsl(20 90% 60%); }
.hex-hl-btn:hover { color: #CCCCCC; border-color: #666666; }
.hex-hl-sub { opacity: 0.8; }
.hex-hl-sep { color: #444444; user-select: none; }

/* Per-byte highlight spans inside the hex dump */
.hb.hl-mtrk    { background: hsl(200 70% 55%); color: var(--bg); border-radius: 2px; }
.hb.hl-keysig  { background: hsl(270 65% 65%); color: var(--bg); border-radius: 2px; }
.hb.hl-noteon  { background: var(--accent);    color: var(--bg); border-radius: 2px; }
.hb.hl-noteoff { background: hsl(38 95% 58%);  color: var(--bg); border-radius: 2px; }
.hb.hl-eot     { background: hsl(0 70% 60%);   color: var(--bg); border-radius: 2px; }
.hb.hl-delta   { background: hsl(210 70% 60%); color: var(--bg); border-radius: 2px; }
.hb.hl-status  { background: hsl(300 60% 65%); color: var(--bg); border-radius: 2px; }
.hb.hl-noteid  { background: hsl(160 75% 50%); color: var(--bg); border-radius: 2px; }
.hb.hl-veloc   { background: hsl(20 90% 60%);  color: var(--bg); border-radius: 2px; }

/* Section 10 — interpreted MIDI note event highlights */
.hex-hl-btn[data-range="non_a1"].on  { border-color: hsl(135 60% 48%); color: hsl(135 60% 48%); }
.hex-hl-btn[data-range="noff_a1"].on { border-color: hsl(5 70% 58%);   color: hsl(5 70% 58%); }
.hex-hl-btn[data-range="non_gs"].on  { border-color: hsl(165 60% 48%); color: hsl(165 60% 48%); }
.hex-hl-btn[data-range="noff_gs"].on { border-color: hsl(25 80% 58%);  color: hsl(25 80% 58%); }
.hex-hl-btn[data-range="non_a2"].on  { border-color: hsl(110 70% 50%); color: hsl(110 70% 50%); }
.hex-hl-btn[data-range="noff_a2"].on { border-color: hsl(45 90% 55%);  color: hsl(45 90% 55%); }
.hb.hl-non-a1  { background: hsl(135 60% 48%); color: var(--bg); border-radius: 2px; }
.hb.hl-noff-a1 { background: hsl(5 70% 58%);   color: var(--bg); border-radius: 2px; }
.hb.hl-non-gs  { background: hsl(165 60% 48%); color: var(--bg); border-radius: 2px; }
.hb.hl-noff-gs { background: hsl(25 80% 58%);  color: var(--bg); border-radius: 2px; }
.hb.hl-non-a2  { background: hsl(110 70% 50%); color: var(--bg); border-radius: 2px; }
.hb.hl-noff-a2 { background: hsl(45 90% 55%);  color: var(--bg); border-radius: 2px; }

/* ── COLLAPSIBLE EXPLANATION ─────────────────────────── */
.section-explain {
  margin: 20px 0 0;
  border: 2px solid #111111;
  border-radius: 0;
  overflow: hidden;
}
.section-explain > summary {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #1133BB;
  background: var(--bg-card);
  user-select: none;
  transition: color 0.15s, background 0.15s;
}
.section-explain > summary::-webkit-details-marker { display: none; }
.section-explain > summary::before {
  content: '▶';
  font-size: 0.5rem;
  transition: transform 0.2s;
  flex-shrink: 0;
}
.section-explain[open] > summary::before { transform: rotate(90deg); }
.section-explain > summary:hover { color: #111111; background: var(--bg-elevated); }
.section-explain-body {
  padding: 20px 24px 24px;
  border-top: 2px solid #111111;
}
.section-explain-body p,
.section-explain-body .section-desc {
  font-size: 0.88rem;
  line-height: 1.78;
  color: var(--text-muted);
  margin-bottom: 0.9rem;
}
.section-explain-body p:last-child,
.section-explain-body .section-desc:last-child { margin-bottom: 0; }
.section-explain-body code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82em;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0;
  padding: 1px 5px;
}
.section-explain-body a { color: var(--accent); }
.section-explain-body strong { color: var(--text); }
/* Dentro del explain la section-desc no debe tener max-width (ya está
   acotada por .section-inner; el 760px global crearía un hueco derecho) */
.section-explain-body .section-desc { max-width: none; }

.section-body {
  padding: 4px 0 8px;
}
.section-body p {
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--text-dim);
  margin-bottom: 0.85rem;
}

.midi-byte-table {
  width: 100%;
  border-collapse: collapse;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  margin: 0.5rem 0 1rem;
}
.midi-byte-table th {
  text-align: left;
  padding: 5px 10px;
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
  font-weight: 500;
}
.midi-byte-table td {
  padding: 5px 10px;
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
  vertical-align: top;
}
.midi-byte-table td:first-child { color: var(--text-muted); width: 2rem; text-align: center; }
.midi-byte-table td:nth-child(2) { width: 3rem; }
.midi-byte-table td code { font-size: 0.85em; }

.midi-byte-table .row-delta  td:nth-child(2) { color: hsl(210 70% 65%); }
.midi-byte-table .row-status td:nth-child(2) { color: hsl(300 60% 70%); }
.midi-byte-table .row-noteid td:nth-child(2) { color: hsl(160 75% 55%); }
.midi-byte-table .row-veloc  td:nth-child(2) { color: hsl(20 90% 65%);  }

.midi-byte-table .row-delta  td:nth-child(3) { color: hsl(210 70% 65%); }
.midi-byte-table .row-status td:nth-child(3) { color: hsl(300 60% 70%); }
.midi-byte-table .row-noteid td:nth-child(3) { color: hsl(160 75% 55%); }
.midi-byte-table .row-veloc  td:nth-child(3) { color: hsl(20 90% 65%);  }
.section-body p:last-child { margin-bottom: 0; }
.section-body code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82em;
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 1px 5px;
  color: var(--cat-codigo);
}

/* ── BINARY DISPLAY ──────────────────────────────────── */
/* ── MSCZ Explorer ──────────────────────────────────── */
.mscz-explorer {
  display: flex;
  gap: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
  min-height: 320px;
}
.mscz-tree-panel {
  width: 240px;
  flex-shrink: 0;
  padding: 20px 16px;
  border-right: 1px solid var(--border);
  overflow-y: auto;
}
.mscz-viewer-panel {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.mscz-viewer-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-code);
  flex-shrink: 0;
}
.mscz-viewer-fname {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: #AAAAAA;
}
.mscz-viewer-note {
  font-size: 0.72rem;
  color: #777777;
  font-style: italic;
  white-space: nowrap;
}
.mscz-code {
  flex: 1;
  margin: 0;
  padding: 14px;
  overflow: auto;
  max-height: 380px;
  background: var(--bg-code);
  color: #CCCCCC;
  font-size: 0.75rem;
  line-height: 1.55;
  tab-size: 2;
}
.mscz-img-panel {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.mscz-img-panel img {
  max-width: 100%;
  max-height: 340px;
  border-radius: 4px;
  border: 1px solid var(--border);
}
mark.xml-note-hl {
  background: hsl(135 55% 18%);
  outline: 1px solid hsl(135 55% 35%);
  outline-offset: 1px;
  border-radius: 2px;
  color: inherit;
}
.bin-item.mscz-file {
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.bin-item.mscz-file:hover {
  border-color: var(--accent);
  background: var(--accent-glow);
}
.bin-item.mscz-file.active {
  border-color: var(--accent);
  background: var(--accent-glow);
}
.bin-item.mscz-file.active .bin-name { color: var(--accent); }

.binary-display {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
}
.binary-structure { padding: 24px; }
.bin-title {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.bin-tree { display: flex; flex-direction: column; gap: 8px; }
.bin-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--bg-code);
  border-radius: 6px;
  border: 1px solid var(--border);
}
.bin-icon { font-size: 1rem; flex-shrink: 0; }
.bin-name {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  color: #CCCCCC;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.bin-size { font-size: 0.75rem; color: #777777; white-space: nowrap; flex-shrink: 0; }

/* MSCZ tree panel: size on new line so filename gets full width */
.mscz-tree-panel .bin-item { flex-wrap: wrap; gap: 4px 12px; }
.mscz-tree-panel .bin-size  { flex-basis: 100%; padding-left: 28px; font-size: 0.65rem; }

.bin-note {
  margin-top: 14px;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-style: italic;
  padding: 10px 14px;
  background: var(--accent-glow);
  border-radius: 6px;
  border-left: 2px solid var(--accent);
}

/* ── CODE BLOCKS ──────────────────────────────────────── */
.code-container {
  border-radius: var(--r);
  overflow: hidden;
  border: 1px solid var(--border);
}
.code-block {
  margin: 0 !important;
  border-radius: 0 !important;
  font-family: 'JetBrains Mono', monospace !important;
  font-size: 0.82rem !important;
  line-height: 1.7 !important;
  max-height: 480px;
  overflow: auto;
  background: var(--bg-code) !important;
}
.code-block code {
  font-family: inherit !important;
}

/* ── MusicXML semantic highlight bar ─────────────────── */
.xml-hl-bar {
  display: flex;
  align-items: center;
  gap: .4rem;
  padding: .45rem .7rem;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.xml-hl-btn {
  font-size: .68rem;
  padding: .18rem .5rem;
  border-radius: 3px;
  border: 1px solid var(--btn-c, #666);
  color: var(--btn-c, #aaa);
  background: transparent;
  cursor: pointer;
  font-family: inherit;
  transition: background .15s, color .15s;
}
.xml-hl-btn.active {
  background: var(--btn-c, #666);
  color: #fff;
}
.xml-hl-stats {
  font-size: .63rem;
  color: var(--text-dim);
  margin-left: auto;
}
/* Per-line category spans */
#code-pre-musicxml span[data-cat] { display: block; }
#code-pre-musicxml[data-hl~="notas"]          span[data-cat="notas"]          { background: hsl(135 55% 11%); outline: 1px solid hsl(135 55% 22%); }
#code-pre-musicxml[data-hl~="apariencia"]     span[data-cat="apariencia"]     { background: hsl(220 50% 15%); outline: 1px solid hsl(220 50% 28%); }
#code-pre-musicxml[data-hl~="meta"]           span[data-cat="meta"]           { background: hsl(40  60% 13%); outline: 1px solid hsl(40  60% 26%); }
#code-pre-musicxml[data-hl~="instrumentacion"] span[data-cat="instrumentacion"] { background: hsl(280 45% 15%); outline: 1px solid hsl(280 45% 28%); }
#code-pre-musicxml[data-hl~="atributos"]      span[data-cat="atributos"]      { background: hsl(195 55% 13%); outline: 1px solid hsl(195 55% 26%); }
#code-pre-musicxml[data-hl~="indicaciones"]   span[data-cat="indicaciones"]   { background: hsl(10  55% 13%); outline: 1px solid hsl(10  55% 26%); }

/* Override Prism theme for our dark bg */
pre[class*="language-"], code[class*="language-"] {
  background: var(--bg-code) !important;
  text-shadow: none !important;
}

/* ── MEI note n1 highlight ───────────────────────────── */
#code-pre-mei span.mei-line { display: block; }
#code-pre-mei[data-hl~="n1"] span.mei-line[data-motif="n1"] {
  background: hsl(200 65% 12%);
  outline: 1px solid hsl(200 65% 30%);
}

/* ── ABC note highlight ──────────────────────────────── */
#code-pre-abc span { display: block; }
#code-pre-abc[data-hl~="note"] span[data-motif="note"] {
  background: hsl(135 55% 11%);
  outline: 1px solid hsl(135 55% 22%);
}

/* ── LilyPond mordent highlight ─────────────────────── */
#code-pre-lilypond span { display: block; }
#code-pre-lilypond[data-hl~="mordent"] span[data-motif="mordent"] {
  background: hsl(50 70% 13%);
  outline: 1px solid hsl(50 70% 32%);
}

/* ── Kern / Humdrum highlight ───────────────────────── */
#code-pre-kern span { display: block; }
#code-pre-kern[data-hl~="note"] span[data-motif="note"] {
  background: hsl(300 50% 12%);
  outline: 1px solid hsl(300 50% 28%);
}

/* ── BRAILLE ─────────────────────────────────────────── */
.braille-display {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
}
.braille-score {
  padding: 28px 28px 20px;
  border-bottom: 1px solid var(--border);
}
.braille-line-label {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 8px;
  margin-top: 20px;
}
.braille-line-label:first-child { margin-top: 0; }
.braille-text {
  font-size: 2rem;
  letter-spacing: 0.15em;
  color: var(--cat-especial);
  line-height: 1.8;
  font-family: 'Segoe UI', system-ui, sans-serif;
}
.braille-legend { padding: 24px 28px; overflow-x: auto; }
.braille-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}
.braille-table th {
  text-align: left;
  color: var(--text-dim);
  font-weight: 500;
  padding: 6px 12px 10px;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border);
}
.braille-table td {
  padding: 7px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  vertical-align: middle;
}
.braille-table tr:last-child td { border-bottom: none; }
.br-sym {
  font-size: 1.3rem;
  color: var(--cat-especial);
  letter-spacing: 0.1em;
  font-family: 'Segoe UI', system-ui, sans-serif;
}

/* ── SVG LAYER DEMO ──────────────────────────────────── */
.svg-layer-demo { margin: 1rem 0; }
.svg-note-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r) var(--r) 0 0;
  padding: 12px 16px 8px;
}
.svg-note-wrap svg { display: block; max-width: 340px; margin: 0 auto; }
.svg-layer-controls {
  display: flex; flex-wrap: wrap; gap: 6px;
  padding: 8px 10px;
  background: var(--bg-card);
  border: 1px solid var(--border); border-top: none;
}
.layer-btn {
  padding: 3px 10px;
  font-family: 'JetBrains Mono', monospace; font-size: 0.72rem;
  border: 1px solid var(--border); border-radius: 3px;
  background: var(--bg); color: var(--text-dim);
  cursor: pointer; transition: border-color .15s, color .15s;
}
.layer-btn.on  { border-color: var(--accent); color: var(--accent); }
.layer-btn:hover { color: var(--text); }
.svg-layer-snip {
  font-family: 'JetBrains Mono', monospace; font-size: 0.68rem;
  color: var(--text-muted); background: var(--bg);
  border: 1px solid var(--border); border-top: none;
  border-radius: 0 0 var(--r) var(--r);
  padding: 6px 12px; min-height: 3rem; white-space: pre;
}

/* ── FOOTER ──────────────────────────────────────────── */
#site-footer {
  padding: 40px 24px;
  text-align: center;
  border-top: 1px solid var(--border);
}
.footer-inner { max-width: 600px; margin: 0 auto; }
.footer-inner p { color: var(--text-dim); font-size: 0.85rem; }
.footer-inner em { color: var(--text-muted); font-style: italic; }
.footer-note { margin-top: 8px; font-size: 0.75rem !important; }
.footer-inner a { color: var(--text-muted); text-decoration: underline; transition: color 0.15s; }
.footer-inner a:hover { color: var(--accent); }

/* ── RESPONSIVE ──────────────────────────────────────── */
@media (max-width: 640px) {

  /* ── Variables móvil ── */
  :root {
    --axis-h: 60px;   /* el eje es más compacto en móvil */
  }

  /* ── Axis ── */
  #axis {
    padding: 5px 12px 4px;
    overflow-x: hidden;   /* evita desbordamiento lateral */
  }
  .axis-title { display: none; }   /* ahorra espacio, queda los botones */
  .axis-top { gap: 4px; }
  /* Botones de categoría: fila scrollable en lugar de desbordarse */
  .axis-cats {
    overflow-x: auto;
    flex-wrap: nowrap;
    scrollbar-width: none;
    padding-bottom: 2px;
  }
  .axis-cats::-webkit-scrollbar { display: none; }
  .cat-filter-btn { font-size: 0.45rem; padding: 2px 5px; }

  /* ── Secciones ── */
  .section-inner { padding: 40px 16px 36px; }
  .section-head { gap: 10px; }
  .section-num { font-size: 2rem; }
  .section-meta { flex-direction: column; gap: 16px; }
  .download-btn { margin-left: 0; width: 100%; justify-content: center; }
  .tool-links { padding-top: 10px; }

  /* ── MSCZ s.11: árbol encima, código/imagen debajo ── */
  .mscz-explorer {
    flex-direction: column;
    min-height: auto;
  }
  .mscz-tree-panel {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border);
    max-height: 220px;
    overflow-y: auto;
  }
  .mscz-viewer-panel { min-height: 280px; }

  /* ── Player flotante ── */
  #sticky-player {
    gap: 8px;
    padding: 0 12px;
  }
  .player-piece { display: none; }
  #mini-wave { min-width: 0; }
  .player-time { font-size: 0.68rem; gap: 2px; }

  /* ── Otros ── */
  .braille-text { font-size: 1.4rem; }
  .bin-item { flex-wrap: wrap; }

  /* Explain body: menos padding lateral en pantallas pequeñas */
  .section-explain-body { padding: 16px 16px 20px; }
}