/* ======================================================
   ESPACIO BPM — explorar.css
   Visor 3D · Figuras Rítmicas · Programa de Estudio
====================================================== */

@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=DM+Sans:wght@300;400;500&display=swap');

/* ======================================================
   VARIABLES
====================================================== */

:root {
  --gold:      #d4af37;
  --gold-dim:  #8a7020;
  --gold-glow: rgba(212,175,55,0.12);
  --bg:        #0a0a0a;
  --surface:   #111111;
  --surface2:  #161616;
  --border:    #1e1e1e;
  --text:      #e8e8e8;
  --muted:     #555;
  --sidebar-w: 200px;
  --header-h:  52px;
}

/* ======================================================
   RESET
====================================================== */

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

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-weight: 300;
  overflow: hidden;
}

/* ======================================================
   HEADER
====================================================== */

.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px 0 0;
  background: rgba(10,10,10,0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-logo-area {
  display: flex;
  align-items: center;
  width: var(--sidebar-w);
  padding: 0 24px;
  border-right: 1px solid var(--border);
  height: 100%;
  flex-shrink: 0;
}

.header-logo {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.95rem;
  letter-spacing: 0.3em;
  color: var(--gold);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.section-title {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.35em;
  color: var(--muted);
  transition: color 0.3s;
}

.back-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  padding: 5px 16px;
  border-radius: 100px;
  cursor: pointer;
  transition: all 0.25s;
}
.back-btn:hover { border-color: var(--gold); color: var(--gold); }

/* ======================================================
   LAYOUT
====================================================== */

.layout {
  display: flex;
  height: 100vh;
  padding-top: var(--header-h);
}

/* ======================================================
   SIDEBAR
====================================================== */

.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  height: 100%;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 24px 0;
  overflow-y: auto;
}

.sidebar-section-label {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.58rem;
  letter-spacing: 0.4em;
  color: var(--muted);
  padding: 0 20px 10px;
  opacity: 0.5;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 20px;
  cursor: pointer;
  border-left: 2px solid transparent;
  transition: all 0.2s ease;
}
.nav-item:hover { background: rgba(255,255,255,0.03); border-left-color: var(--border); }
.nav-item.active { background: var(--gold-glow); border-left-color: var(--gold); }

.nav-icon {
  width: 28px; height: 28px;
  border-radius: 6px;
  background: var(--surface2);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s;
}
.nav-item.active .nav-icon { border-color: var(--gold-dim); background: rgba(212,175,55,0.08); }
.nav-icon svg { opacity: 0.5; transition: opacity 0.2s; }
.nav-item.active .nav-icon svg,
.nav-item:hover .nav-icon svg { opacity: 1; }

.nav-text { display: flex; flex-direction: column; gap: 1px; }

.nav-label {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  transition: color 0.2s;
  line-height: 1;
}
.nav-item:hover .nav-label { color: var(--text); }
.nav-item.active .nav-label { color: var(--gold); }

.nav-sub {
  font-size: 0.6rem;
  color: #333;
  letter-spacing: 0.05em;
  line-height: 1;
  transition: color 0.2s;
}
.nav-item:hover .nav-sub { color: #444; }
.nav-item.active .nav-sub { color: var(--gold-dim); }

/* ======================================================
   MAIN + PANELS
====================================================== */

.main {
  flex: 1;
  height: 100%;
  overflow: hidden;
  position: relative;
}

/* Panel material scrollea dentro del main */
#panel-material {
  overflow-y: auto;
  overflow-x: hidden;
}

/* Cuando está activo, permite scroll interno */
#panel-material.active {
  position: absolute;
  inset: 0;
  overflow-y: auto;
}

.panel {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.panel.active {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

#panel-visor    { display: flex; flex-direction: column; overflow: hidden; }
#panel-programa { overflow: hidden; position: relative; height: 100%; }

/* ======================================================
   VISOR 3D
====================================================== */

.viewer-header {
  padding: 20px 28px 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.viewer-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 6px var(--gold);
  animation: glow-pulse 2.5s ease-in-out infinite;
}
@keyframes glow-pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 6px var(--gold); }
  50%       { opacity: 0.4; box-shadow: 0 0 3px var(--gold); }
}

.viewer-dot-label {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.65rem;
  letter-spacing: 0.3em;
  color: var(--muted);
}

.viewer-body {
  flex: 1;
  min-height: 0;
  padding: 0 28px 28px;
  display: flex;
  flex-direction: column;
}

#three-container {
  flex: 1;
  min-height: 0;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 0 0 1px var(--border), 0 20px 60px rgba(0,0,0,0.5);
  position: relative;
}

/* ======================================================
   NOTATION PANEL (overlay visor)
====================================================== */

.notation-panel {
  position: absolute;
  bottom: 24px;
  right: 24px;
  z-index: 10;
  pointer-events: none;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.35s ease, transform 0.35s ease;
  width: 300px;
  max-height: calc(100% - 48px);
  overflow-y: auto;
  scrollbar-width: none;
}
.notation-panel::-webkit-scrollbar { display: none; }
.notation-panel.visible { opacity: 1; transform: translateY(0); }

.notation-inner {
  background: rgba(8,8,8,0.9);
  border: 1px solid rgba(212,175,55,0.14);
  border-radius: 12px;
  padding: 16px 16px 18px;
  backdrop-filter: blur(16px);
  pointer-events: all;
}

.notation-name {
  display: none;
}

/* SVG partitura dentro del panel */
#notation-svg {
  width: 100%;
}

#notation-svg svg {
  width: 100% !important;
  height: auto !important;
  max-height: 250px;
  display: block;
}


/* Botones de sonido */
#notation-buttons {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 10px;
  border-top: 1px solid var(--border);
  padding-top: 10px;
}

#notation-buttons:empty {
  display: none;
}

.notation-play-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(10,10,10,0.75);
  border: 1px solid rgba(212,175,55,0.2);
  color: rgba(212,175,55,0.7);
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  padding: 10px 14px;
  border-radius: 4px;
  cursor: pointer;
  pointer-events: all;
  transition: all 0.2s;
  white-space: nowrap;
  flex: 1;
}
.notation-play-btn svg { flex-shrink: 0; width: 10px; height: 10px; }
.notation-play-btn svg polygon { fill: currentColor; }
.notation-play-btn:hover {
  background: rgba(212,175,55,0.1);
  border-color: var(--gold);
  color: var(--gold);
}

/* ======================================================
   MATERIAL DE ESTUDIO
====================================================== */

.material-inner {
  padding: 6px 24px 60px;
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

.material-heading {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  line-height: 1;
  margin-bottom: 0;
  flex-shrink: 0;
}


.subtabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0;
  flex-shrink: 0;
}

.subtab {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--muted);
  padding: 5px 16px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color 0.2s, border-color 0.2s;
}
.subtab:hover { color: var(--text); }
.subtab.active { color: var(--gold); border-bottom-color: var(--gold); }

.subtab-panel { display: none; }
.subtab-panel.active {
  display: block;
}
.subtab-panel.active::-webkit-scrollbar { display: none; }

/* ======================================================
   TABLA DE FIGURAS
====================================================== */

.tabla-wrapper {
  background: transparent;
  border: none;
  border-radius: 0;
  overflow: visible;
  flex-shrink: 0;
  height: calc(100vh - var(--header-h) - 80px);
  min-height: 340px;
  display: flex;
  flex-direction: column;
}

.tabla-titulo {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.62rem;
  letter-spacing: 0.4em;
  color: var(--gold-dim);
  padding: 10px 24px 8px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  border-bottom: 1px solid var(--border);
}
.tabla-titulo::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.tabla-body {
  display: flex;
  flex: 1;
  min-height: 0;
}

/* Columna izquierda: árbol */
.tabla-arbol {
  flex: 0 0 52%;
  border-right: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  overflow: hidden;
  position: relative;
}

.tabla-arbol-hint {
  position: absolute;
  bottom: 14px;
  left: 0; right: 0;
  text-align: center;
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.52rem;
  letter-spacing: 0.3em;
  color: var(--muted);
  opacity: 0.5;
  pointer-events: none;
}

#tabla-figuras-svg {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
#tabla-figuras-svg svg {
  width: 100%;
  height: 100%;
  max-height: 100%;
  max-width: 420px;
  object-fit: contain;
  margin: 0 auto;
  display: block;
}

/* Columna derecha: info */
.tabla-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  scrollbar-width: none;
}
.tabla-info::-webkit-scrollbar { display: none; }

.tabla-info-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 32px;
  opacity: 0.35;
}
.tabla-info-empty-icon {
  width: 32px; height: 32px;
  border: 1px solid var(--muted);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}
.tabla-info-empty span {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.6rem;
  letter-spacing: 0.3em;
  color: var(--muted);
  text-align: center;
}

.tabla-figura-panel {
  display: none;
  flex-direction: column;
  padding: 18px 20px;
  gap: 10px;
  animation: fadeInPanel 0.2s ease;
}
.tabla-figura-panel.visible { display: flex; }

@keyframes fadeInPanel {
  from { opacity: 0; transform: translateX(8px); }
  to   { opacity: 1; transform: translateX(0); }
}

.tabla-figura-nombre {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.4rem;
  letter-spacing: 0.15em;
  color: var(--gold);
  line-height: 1;
}

.tabla-figura-desc {
  font-size: 0.74rem;
  color: #ccc;
  line-height: 1.6;
}

.tabla-figura-stats { display: flex; gap: 16px; }

.tabla-figura-stat { display: flex; flex-direction: column; gap: 2px; }

.tabla-figura-stat-num {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.6rem;
  color: #fff;
  line-height: 1;
}

.tabla-figura-stat-lbl {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.52rem;
  letter-spacing: 0.2em;
  color: #aaa;
}

.tabla-figura-svgs { display: flex; gap: 20px; align-items: flex-start; }

.tabla-figura-svg-bloque {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.tabla-figura-svg-lbl {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.48rem;
  letter-spacing: 0.25em;
  color: #aaa;
}

.tabla-figura-svg-wrap {
  width: 48px; height: 68px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 6px;
  padding: 4px;
}
.tabla-figura-svg-wrap svg { width: 100%; height: 100%; }

.tabla-silencio-desc {
  font-size: 0.52rem;
  color: #aaa;
  line-height: 1.4;
  text-align: center;
  font-style: italic;
  max-width: 90px;
}

/* Figuras clickeables */
.fig-clickable {
  cursor: pointer;
  border-radius: 6px;
  box-shadow: 0 0 0 1px rgba(212,175,55,0.2), 0 0 10px rgba(212,175,55,0.1);
  transition: box-shadow 0.2s ease, opacity 0.2s ease;
}
.fig-clickable:hover {
  box-shadow: 0 0 0 1px rgba(212,175,55,0.5), 0 0 16px rgba(212,175,55,0.3);
  opacity: 0.85;
}
.fig-clickable.fig-active path,
.fig-clickable.fig-active rect,
.fig-clickable.fig-active use { fill: var(--gold) !important; }
.fig-clickable.fig-active path[fill="none"] { stroke: var(--gold) !important; }

/* Videos figuras rítmicas */
.figuras-videos-row {
  display: flex;
  flex-direction: row;
  gap: 20px;
  justify-content: center;
  align-items: flex-start;
  padding: 20px 24px 40px;
  flex-shrink: 0;
  border-top: 1px solid var(--border);
}

.figuras-video-bloque {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  flex: 1;
  max-width: 380px;
}

.figuras-video-titulo {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.62rem;
  letter-spacing: 0.3em;
  color: var(--gold-dim);
  text-align: center;
}

.figuras-video {
  width: 100%;
  aspect-ratio: 720 / 900;
  object-fit: cover;
  background: #000;
  display: block;
  border-radius: 8px;
}

/* ======================================================
   PROGRAMA DE ESTUDIO — REPRODUCTOR
====================================================== */

.rp-layout {
  display: flex;
  flex-direction: row;
  position: absolute;
  inset: 0;
  overflow: hidden;
}

/* Columna izquierda */
.rp-left {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-right: 1px solid var(--border);
}

/* Título del ejercicio */
.rp-ej-header {
  flex-shrink: 0;
  padding: 12px 20px 8px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.rp-ej-titulo {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.25em;
  color: var(--gold);
}

/* Descripción del ejercicio */
.rp-desc-overlay {
  position: relative;
  background: rgba(10,10,10,0.92);
  border-bottom: 1px solid var(--border);
  border-left: 2px solid var(--gold-dim);
  padding: 10px 40px 10px 16px;
  flex-shrink: 0;
}

.rp-desc-text {
  font-size: 0.75rem;
  color: #aaa;
  line-height: 1.6;
}

.rp-desc-close {
  position: absolute;
  top: 8px; right: 10px;
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.7rem;
  transition: color 0.15s;
}
.rp-desc-close:hover { color: var(--text); }

/* Partitura SVG */
.rp-score-wrap {
  width: 100%;
  flex-shrink: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  height: 180px;
  overflow: hidden;
}

.rp-score-wrap svg {
  width: 100%;
  height: auto;
  display: block;
  overflow: hidden;
}

.rp-score-wrap svg path,
.rp-score-wrap svg rect,
.rp-score-wrap svg polygon,
.rp-score-wrap svg polyline,
.rp-score-wrap svg use,
.rp-score-wrap svg ellipse {
  fill: white !important;
  stroke: white !important;
}
.rp-score-wrap svg text { fill: white !important; stroke: none !important; }

/* Highlight notas activas — sobreescribe el blanco */
.rp-score-wrap .note-active path,
.rp-score-wrap .note-active use,
.rp-score-wrap .note-active polygon,
.rp-score-wrap .note-active polyline,
.rp-score-wrap .note-active ellipse,
.rp-score-wrap .note-active rect {
  fill: var(--gold) !important;
  stroke: var(--gold) !important;
  filter: drop-shadow(0 0 8px rgba(212,175,55,0.9));
}

/* Controles reproductor */
.rp-controls {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 12px 20px;
  flex-shrink: 0;
  flex-wrap: wrap;
}

.rp-btn-play {
  background: var(--gold);
  color: #000;
  border: none;
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1rem;
  letter-spacing: 0.1em;
  padding: 7px 22px;
  cursor: pointer;
  border-radius: 4px;
  transition: background 0.15s;
  min-width: 90px;
}
.rp-btn-play:hover    { background: var(--gold-dim); color: #fff; }
.rp-btn-play.playing  { background: #c0392b; color: #fff; }
.rp-btn-play:disabled { opacity: 0.3; cursor: not-allowed; }

.rp-label {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.52rem;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.rp-bpm-display { display: flex; flex-direction: column; gap: 2px; }

.rp-bpm-val {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.1rem;
  color: var(--gold);
}

.rp-progress-wrap { flex: 1; min-width: 80px; display: flex; flex-direction: column; gap: 6px; }

.rp-progress-bg {
  width: 100%;
  height: 2px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}
.rp-progress-fill {
  height: 100%;
  background: var(--gold);
  width: 0%;
  transition: width 0.1s linear;
}

.rp-beat-wrap { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.rp-beat-dots { display: flex; gap: 6px; }

.rp-beat-dot {
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--border);
  border: 1px solid #2a2a2a;
  display: flex; align-items: center; justify-content: center;
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.65rem;
  color: #333;
  transition: background 0.05s, box-shadow 0.05s, color 0.05s;
}
.rp-beat-dot.active {
  background: var(--gold);
  border-color: var(--gold);
  color: #000;
  box-shadow: 0 0 8px rgba(212,175,55,0.7);
}
.rp-beat-dot.rp-beat-one.active {
  background: #e05c2a;
  border-color: #e05c2a;
  color: #fff;
  box-shadow: 0 0 10px rgba(224,92,42,0.7);
}

.rp-btn-loop {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  padding: 6px 14px;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.15s;
}
.rp-btn-loop.active { color: var(--gold); border-color: var(--gold); }

/* Lista ejercicios */
.rp-sidebar {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  scrollbar-width: none;
  padding: 12px 0;
  background: var(--bg);
}
.rp-sidebar::-webkit-scrollbar { display: none; }

.rp-sidebar-title {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.5rem;
  letter-spacing: 0.4em;
  color: var(--muted);
  opacity: 0.5;
  padding: 0 16px 10px;
  display: block;
}

.rp-nivel { display: flex; flex-direction: column; margin-bottom: 4px; }

.rp-nivel-label {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.52rem;
  letter-spacing: 0.3em;
  color: var(--gold-dim);
  padding: 6px 16px 5px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.ej-card {
  padding: 8px 16px;
  cursor: pointer;
  border-left: 2px solid transparent;
  transition: all 0.18s;
}
.ej-card:hover  { background: rgba(255,255,255,0.04); border-left-color: var(--border); }
.ej-card.active { background: var(--gold-glow); border-left-color: var(--gold); }

.ej-nombre {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  transition: color 0.18s;
  display: block;
}
.ej-card:hover  .ej-nombre { color: var(--text); }
.ej-card.active .ej-nombre { color: var(--gold); }

/* Comentario */
.rp-comentario {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.6;
  padding: 10px 16px;
  border-left: 2px solid var(--gold-dim);
  background: rgba(212,175,55,0.04);
  border-radius: 0 6px 6px 0;
  flex-shrink: 0;
}

/* Loading */
.rp-loading {
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-align: center;
  font-family: 'Bebas Neue', sans-serif;
}

/* Columna derecha: video */
.rp-video-wrap {
  flex-shrink: 0;
  background: #000;
  overflow: hidden;
  position: relative;
  aspect-ratio: 4/5;
  height: 100%;
  width: auto;
}
.rp-video-wrap video {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}

/* Overlay precuenta */
#rp-countdown-overlay {
  display: none;
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.72);
  backdrop-filter: blur(8px);
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  z-index: 10;
}
#rp-countdown-overlay.visible { display: flex; }

.rp-cd-number {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 8rem;
  color: var(--gold);
  line-height: 1;
  letter-spacing: 0.05em;
  opacity: 0;
  transform: scale(0.7);
  text-shadow: 0 0 40px rgba(212,175,55,0.5);
}
.rp-cd-number.pop { animation: rp-pop 0.55s ease forwards; }

@keyframes rp-pop {
  0%   { opacity: 0; transform: scale(0.6); }
  20%  { opacity: 1; transform: scale(1.15); }
  40%  { transform: scale(0.95); }
  60%  { transform: scale(1.05); }
  80%  { transform: scale(1); opacity: 1; }
  100% { opacity: 0.3; transform: scale(1); }
}

/* ======================================================
   RESPONSIVE
====================================================== */

/* Select mobile: oculto en desktop, visible solo en mobile */
.rp-select-mobile-wrap { display: none; }

@media (max-width: 768px) and (orientation: portrait) {

  /* ── HEADER ───────────────────────────────────────── */
  .header { padding: 0 16px; }
  .section-title { display: none; }
  .header-logo-area {
    width: auto;
    border-right: none;
    padding: 0;
  }

  /* ── LAYOUT — sidebar va abajo ────────────────────── */
  .layout {
    flex-direction: column;
    padding-top: var(--header-h);
    padding-bottom: 56px;
  }

  /* ── SIDEBAR como tab bar fija abajo ──────────────── */
  .sidebar {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    width: 100%;
    height: 56px;
    flex-direction: row;
    align-items: center;
    justify-content: space-around;
    padding: 0;
    border-right: none;
    border-top: 1px solid var(--border);
    z-index: 100;
  }
  .sidebar-section-label { display: none; }
  .nav-item {
    flex: 1;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 8px 4px;
    border-left: none;
    border-top: 2px solid transparent;
    gap: 4px;
  }
  .nav-item.active { border-left-color: transparent; border-top-color: var(--gold); }
  .nav-text { display: none; }
  .nav-icon { width: 24px; height: 24px; }

  /* ── MAIN ocupa todo ──────────────────────────────── */
  .main { width: 100%; height: 100%; }

  /* ── VISOR ────────────────────────────────────────── */
  .viewer-body  { padding: 0 12px 12px; }
  .viewer-header { padding: 12px 16px 8px; }
  .notation-panel { width: 160px; bottom: 12px; right: 12px; }
  .notation-inner { padding: 10px 10px 12px; }

  /* ── ÁRBOL FIGURAS ────────────────────────────────── */
  .tabla-wrapper { height: auto; min-height: unset; }
  .tabla-body { flex-direction: column; }
  .tabla-arbol {
    flex: 0 0 auto;
    height: 72vw;
    border-right: none;
    border-bottom: 1px solid var(--border);
    justify-content: center;
    align-items: center;
    padding: 8px;
  }
  #tabla-figuras-svg {
    width: 120%; height: 120%;
    display: flex; align-items: center; justify-content: center;
  }
  #tabla-figuras-svg svg {
    width: auto; height: 120%;
    max-width: 100%; display: block;
    margin: 0 auto; transform: translateX(10%);
  }
  .tabla-figura-panel    { padding: 9px 11px; gap: 5px; }
  .tabla-figura-nombre   { font-size: 0.85rem; }
  .tabla-figura-desc     { font-size: 0.58rem; line-height: 1.4; }
  .tabla-figura-stats    { gap: 9px; }
  .tabla-figura-stat-num { font-size: 1rem; }
  .tabla-figura-stat-lbl { font-size: 0.4rem; }
  .tabla-figura-svgs     { gap: 11px; }
  .tabla-figura-svg-wrap { width: 32px; height: 47px; }
  .tabla-silencio-desc   { font-size: 0.4rem; max-width: 63px; }
  .figuras-videos-row    { flex-direction: column; align-items: center; padding: 16px 0 40px; }
  .figuras-video-bloque  { max-width: 100%; width: 100%; }

  /* ══════════════════════════════════════════════════
     PROGRAMA DE ESTUDIO — MOBILE

     Layout (todo visible, sin scroll):
     ┌──────────────────────────────────┐
     │  [select ejercicio  ▾]           │
     ├──────────────────────────────────┤
     │  título + desc                   │
     ├──────────────────────────────────┤
     │  SVG partitura  (80px)           │
     ├──────────────────────────────────┤
     │  controles BPM/beats/loop        │
     ├──────────────────────────────────┤
     │  VIDEO full-width (resto)        │
     └──────────────────────────────────┘
  ══════════════════════════════════════════════════ */

  #panel-programa { overflow: hidden; }

  .rp-layout {
    flex-direction: column;
    height: 100%;
    overflow: hidden;
  }

  /* select mobile: visible solo en mobile */
  /* DESPUÉS */
  .rp-select-mobile-wrap {
    display: block;
    flex-shrink: 0;
    padding: 3px 12px;
    border-bottom: 1px solid var(--border);
    background: var(--bg);
    position: relative;
    z-index: 50;
    overflow: visible;
  }

  .rp-select-mobile {
    width: 100%;
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 3px;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.7rem;
    font-weight: 400;
    padding: 3px 8px;
    cursor: pointer;
    appearance: auto;
  }
  /* los optgroup (niveles) los colorea el sistema nativo */

  .rp-left {
    flex: none;
    height: auto;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border-right: none;
  }

  /* título */
  .rp-ej-header {
    padding: 6px 12px 4px;
    flex-shrink: 0;
  }
  .rp-ej-titulo { font-size: 0.6rem; letter-spacing: 0.15em; }

  /* descripción */
  .rp-desc-overlay {
    padding: 5px 28px 5px 12px;
    flex-shrink: 0;
  }
  .rp-desc-text { font-size: 0.62rem; line-height: 1.4; }

  /* partitura: altura fija que muestra el SVG completo */
  .rp-score-wrap {
    height: 80px;
    flex-shrink: 0;
  }

  /* controles en una sola fila */
  .rp-controls {
    padding: 4px 10px;
    gap: 8px;
    flex-shrink: 0;
    flex-wrap: nowrap;
    overflow: hidden;
  }
  .rp-btn-play      { font-size: 0.65rem; padding: 4px 10px; min-width: 54px; }
  .rp-bpm-val       { font-size: 0.8rem; }
  .rp-label         { font-size: 0.38rem; }
  .rp-beat-dot      { width: 14px; height: 14px; font-size: 0.46rem; }
  .rp-beat-dots     { gap: 3px; }
  .rp-btn-loop      { font-size: 0.5rem; padding: 4px 8px; }
  .rp-progress-wrap { min-width: 30px; }

  /* lista: OCULTA en mobile (reemplazada por el select) */
  .rp-sidebar       { display: none; }
  .rp-comentario    { display: none; }

  /* video: ocupa todo el espacio que queda */
  .rp-video-wrap {
    flex: 1;
    min-height: 0;
    width: 100%;
    aspect-ratio: unset;
    position: relative;
    overflow: hidden;
    border-top: 1px solid var(--border);
  }
  .rp-video-wrap video {
    position: absolute;
    inset: 0;
    width: 100%; height: 100%;
    object-fit: cover;
    object-position: center 100%;
  }

  /* countdown */
  #rp-countdown-overlay { border-radius: 0; }
  .rp-cd-number { font-size: 4rem; }

  /* custom select */
  .rp-custom-select {
    position: relative;
    width: 100%;
  }
  .rp-custom-select-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 3px;
    padding: 6px 10px;
    cursor: pointer;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.7rem;
    color: var(--text);
    transition: border-color 0.2s;
  }
  .rp-custom-select-trigger:hover { border-color: var(--gold-dim); }
  .rp-custom-select-arrow {
    font-size: 0.55rem;
    color: var(--muted);
    transition: transform 0.2s;
  }
  .rp-custom-select.open .rp-custom-select-arrow { transform: rotate(180deg); }
  .rp-custom-select-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-top: none;
    border-radius: 0 0 4px 4px;
    z-index: 500;
    max-height: 220px;
    overflow-y: auto;
  }
  .rp-custom-select.open .rp-custom-select-dropdown { display: block; }
  .rp-custom-select-nivel {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 0.5rem;
    letter-spacing: 0.3em;
    color: var(--gold-dim);
    padding: 8px 12px 4px;
    border-top: 1px solid var(--border);
  }
  .rp-custom-select-option {
    padding: 7px 12px;
    font-size: 0.68rem;
    color: var(--muted);
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
  }
  .rp-custom-select-option:hover { background: var(--gold-glow); color: var(--text); }
  .rp-custom-select-option.active { color: var(--gold); }

}