/* ====================================================================
   STRINGS TRAINER STUDIO - STUDIO PRO LIGHT 2.0
   Baixo, Guitarra e Violão (macOS Glassmorphism & Titanium Metal)
   ==================================================================== */

:root {
  --font-sans: 'SF Pro Display', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Cores macOS Studio Pro Light */
  --bg-desktop: #ECEEF2;
  --window-bg: rgba(255, 255, 255, 0.86);
  --glass-bg: rgba(255, 255, 255, 0.82);
  --glass-border: rgba(255, 255, 255, 0.95);
  --glass-shadow: 0 16px 36px -8px rgba(0, 0, 0, 0.08);

  /* Titânio Escovado (Sidebar) */
  --sidebar-gradient: linear-gradient(180deg, #DCE0E4 0%, #CCD1D7 100%);
  --sidebar-border: rgba(180, 185, 195, 0.5);

  /* Acentos Apple Pro */
  --accent-blue: #007AFF;
  --accent-blue-hover: #0062CC;
  --accent-amber: #FF9500;
  --amber-glow: rgba(255, 149, 0, 0.45);
  --accent-green: #34C759;
  --accent-red: #FF3B30;
  --accent-purple: #AF52DE;
  
  /* Textos */
  --text-main: #1D1D1F;
  --text-secondary: #6E6E73;
  --text-tertiary: #86868B;
  --card-bg: rgba(255, 255, 255, 0.76);
  --card-border: rgba(210, 215, 225, 0.6);

  /* Traffic lights */
  --tl-red: #FF5F56;
  --tl-yellow: #FFBD2E;
  --tl-green: #27C93F;

  /* Cores das Cordas (Padrão Rocksmith / Studio Pro) */
  --string-6-color: #FF3B30; /* Corda 6 (E grave) - Vermelho */
  --string-5-color: #FFCC00; /* Corda 5 (A) - Amarelo */
  --string-4-color: #007AFF; /* Corda 4 (D) - Azul */
  --string-3-color: #FF9500; /* Corda 3 (G) - Laranja */
  --string-2-color: #34C759; /* Corda 2 (B) - Verde */
  --string-1-color: #AF52DE; /* Corda 1 (E aguda) - Roxo */
  --string-sub-color: #5AC8FA; /* Corda Baixo B (Grave) - Ciano */

  /* Braço de Madeira Realista */
  --fretboard-wood: #2B1D14; /* Rosewood profundo */
  --fretboard-inlay: #E8E5DD;
  --fret-wire: #D8DCE3;
  --nut-color: #FFFDF7;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

.hidden {
  display: none !important;
}

.nav-item * {
  pointer-events: none;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-desktop);
  background-image: 
    radial-gradient(at 0% 0%, rgba(200, 215, 240, 0.5) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(225, 230, 245, 0.6) 0px, transparent 50%);
  height: 100vh;
  height: 100dvh;
  width: 100vw;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Janela macOS */
.macos-window {
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  background: var(--window-bg);
  backdrop-filter: blur(25px);
  -webkit-backdrop-filter: blur(25px);
  display: flex;
  flex-direction: column;
  box-shadow: var(--glass-shadow);
  overflow: hidden;
}

/* Barra Superior da Janela macOS */
.window-titlebar {
  height: 42px;
  background: rgba(245, 247, 250, 0.92);
  border-bottom: 1px solid rgba(210, 215, 225, 0.6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  user-select: none;
  z-index: 50;
}

.traffic-lights {
  display: flex;
  gap: 8px;
  align-items: center;
}

.traffic-btn {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: inline-block;
  cursor: pointer;
  transition: opacity 0.15s;
}

.traffic-btn.red { background-color: var(--tl-red); }
.traffic-btn.yellow { background-color: var(--tl-yellow); }
.traffic-btn.green { background-color: var(--tl-green); }

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 18px;
  cursor: pointer;
  color: var(--text-main);
  padding: 4px 8px;
}

.window-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-main);
}

.window-title .title-badge {
  font-size: 10.5px;
  background: rgba(0, 122, 255, 0.12);
  color: var(--accent-blue);
  padding: 2px 7px;
  border-radius: 999px;
  font-weight: 700;
}

.titlebar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.instrument-tag-badge {
  font-size: 11px;
  font-weight: 700;
  background: #FFF;
  color: var(--text-main);
  padding: 3px 9px;
  border-radius: 6px;
  border: 1px solid rgba(200, 205, 215, 0.8);
}

.engine-badge {
  font-size: 10.5px;
  font-weight: 600;
  color: var(--accent-green);
  background: rgba(52, 199, 89, 0.12);
  padding: 3px 8px;
  border-radius: 6px;
}

/* Corpo da Janela */
.window-body {
  flex: 1;
  display: flex;
  position: relative;
  overflow: hidden;
}

/* Sidebar Titânio Escovado */
.sidebar-metal {
  width: 250px;
  background: var(--sidebar-gradient);
  border-right: 1px solid var(--sidebar-border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 16px 12px;
  z-index: 40;
  box-shadow: 2px 0 10px rgba(0, 0, 0, 0.03);
}

.studio-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  padding: 0 4px;
}

.brand-logo {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #1D1D1F 0%, #3A3A3C 100%);
  color: #FFF;
  font-weight: 800;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.brand-info h2 {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: 0.5px;
}

.brand-info p {
  font-size: 10.5px;
  color: var(--text-secondary);
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 8px;
  border: none;
  background: transparent;
  color: var(--text-main);
  font-size: 12.5px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: left;
  position: relative;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.6);
}

.nav-item.active {
  background: #FFFFFF;
  color: var(--accent-blue);
  font-weight: 600;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06);
}

.nav-icon {
  width: 17px;
  height: 17px;
  fill: currentColor;
  opacity: 0.85;
}

.nav-counter {
  margin-left: auto;
  font-size: 10px;
  padding: 1px 6px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.08);
  font-weight: 600;
}

.sidebar-footer {
  padding-top: 12px;
  border-top: 1px solid rgba(180, 185, 195, 0.4);
}

.volume-slider-box {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--text-secondary);
}

/* Área de Conteúdo Principal */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  background: rgba(255, 255, 255, 0.65);
  overflow: hidden;
}

/* Topbar Flutuante */
.floating-topbar {
  height: 52px;
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(220, 225, 235, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  gap: 12px;
  z-index: 30;
  overflow-x: auto;
}

.topbar-metric {
  display: flex;
  flex-direction: column;
}

.metric-label {
  font-size: 9px;
  font-weight: 700;
  color: var(--text-tertiary);
  letter-spacing: 0.8px;
}

.metric-value {
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 700;
}

.score-val { color: var(--accent-blue); }
.combo-val { color: var(--accent-amber); }
.acc-val { color: var(--accent-green); }

.hit-feedback-container {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 0, 0, 0.04);
  padding: 4px 10px;
  border-radius: 8px;
}

.chord-detect-tag {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-main);
  min-width: 140px;
}

.amber-glow-tag {
  font-size: 10px;
  font-weight: 800;
  background: var(--amber-glow);
  color: #B25900;
  padding: 2px 7px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}

.sustain-pedal-indicator {
  font-size: 9.5px;
  font-weight: 700;
  color: var(--text-tertiary);
  background: rgba(0, 0, 0, 0.05);
  padding: 4px 8px;
  border-radius: 6px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  transition: all 0.15s;
}

.sustain-pedal-indicator.active {
  background: rgba(0, 122, 255, 0.15);
  color: var(--accent-blue);
  border-color: var(--accent-blue);
}

.view-selectors {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}

.macos-select {
  height: 28px;
  background: #FFF;
  border: 1px solid rgba(200, 205, 215, 0.8);
  border-radius: 6px;
  padding: 0 8px;
  font-size: 11.5px;
  font-weight: 500;
  color: var(--text-main);
  cursor: pointer;
  outline: none;
}

.macos-select:focus {
  border-color: var(--accent-blue);
}

.macos-range {
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: rgba(0, 0, 0, 0.15);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

.macos-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #FFF;
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
  border: 1px solid rgba(0,0,0,0.1);
  cursor: pointer;
}

/* ÁREA CENTRAL: SPLIT-SCREEN DINÂMICO */
.split-viewport {
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.split-pane {
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  background: #FAFAFC;
  border-bottom: 1px solid rgba(220, 225, 235, 0.7);
}

.split-pane.pane-right {
  border-bottom: none;
}

.pane-header {
  height: 28px;
  background: rgba(240, 243, 248, 0.8);
  border-bottom: 1px solid rgba(220, 225, 235, 0.5);
  display: flex;
  align-items: center;
  padding: 0 12px;
  user-select: none;
}

.pane-tag {
  font-size: 10.5px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.pane-body {
  flex: 1;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Modo Lado a Lado (50 / 50) */
.split-viewport.layout-splitscreen {
  flex-direction: row;
}

.split-viewport.layout-splitscreen .split-pane.pane-left {
  border-bottom: none;
  border-right: 1px solid rgba(220, 225, 235, 0.7);
}

/* Modo Fretboard Embaixo (Alinhado Studio) */
.split-viewport.layout-fretboard-bottom .split-pane.pane-left {
  flex: 1.1;
}

.split-viewport.layout-fretboard-bottom .split-pane.pane-right {
  flex: 0.9;
  min-height: 180px;
}

/* ====================================================================
   RENDERIZAÇÃO DO BRAÇO INTERATIVO (REALISTIC FRETBOARD)
   ==================================================================== */
.fretboard-container {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  overflow-x: auto;
  overflow-y: hidden;
}

.fretboard-neck {
  position: relative;
  height: 160px;
  min-width: 900px;
  width: 98%;
  background: linear-gradient(180deg, #3C2719 0%, #22150E 100%);
  border-radius: 6px;
  box-shadow: inset 0 2px 8px rgba(0,0,0,0.6), 0 8px 18px rgba(0,0,0,0.2);
  display: flex;
  border: 1px solid #150C07;
  user-select: none;
}

.fretboard-nut {
  width: 14px;
  height: 100%;
  background: linear-gradient(90deg, #FFFDF8 0%, #D8D2C5 100%);
  border-radius: 5px 0 0 5px;
  box-shadow: 2px 0 4px rgba(0,0,0,0.5);
  z-index: 10;
}

.fret-wire {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, #FFFFFF 0%, #A0A5AE 50%, #686D76 100%);
  box-shadow: 1px 0 3px rgba(0,0,0,0.4);
  z-index: 5;
}

.fret-number-marker {
  position: absolute;
  bottom: -20px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--text-tertiary);
  transform: translateX(-50%);
}

.inlay-dot {
  position: absolute;
  width: 12px;
  height: 12px;
  background: radial-gradient(circle, #FFFDF5 0%, #C8C5BC 100%);
  border-radius: 50%;
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.3);
  z-index: 3;
}

.inlay-dot-double {
  display: flex;
  flex-direction: column;
  gap: 40px;
  position: absolute;
  z-index: 3;
}

.guitar-string-line {
  position: absolute;
  left: 0;
  right: 0;
  background: linear-gradient(180deg, #FFFFFF 0%, #B8BAC0 50%, #757982 100%);
  box-shadow: 0 2px 4px rgba(0,0,0,0.6);
  z-index: 8;
  pointer-events: none;
}

.fret-cell {
  position: absolute;
  cursor: pointer;
  z-index: 12;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.08s ease;
}

.fret-cell:hover .fret-note-bubble {
  opacity: 0.9;
  transform: scale(1.05);
}

.fret-note-bubble {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  border: 1.5px solid rgba(0, 0, 0, 0.2);
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 5px rgba(0,0,0,0.3);
  transition: all 0.1s ease;
  opacity: 0.6;
}

.fret-note-bubble.highlighted {
  opacity: 1;
  background: var(--accent-blue);
  color: #FFF;
  border-color: #FFF;
  box-shadow: 0 0 10px rgba(0, 122, 255, 0.8);
}

.fret-note-bubble.root-note {
  background: var(--accent-red) !important;
  color: #FFF !important;
  font-weight: 800;
}

.fret-note-bubble.blue-note {
  background: var(--accent-amber) !important;
  color: #FFF !important;
  font-weight: 800;
}

.fret-note-bubble.pressed {
  background: var(--accent-green) !important;
  color: #FFF !important;
  transform: scale(1.25) !important;
  box-shadow: 0 0 16px rgba(52, 199, 89, 1) !important;
  opacity: 1 !important;
}

/* ====================================================================
   FRETBOARD HIGHWAY 3D (CANVAS 60 FPS)
   ==================================================================== */
.highway-canvas-wrapper {
  width: 100%;
  height: 100%;
  position: relative;
  background: radial-gradient(circle at 50% 10%, #202530 0%, #0F1218 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.highway-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* ====================================================================
   TABLATURA & PARTITURA EM TEMPO REAL
   ==================================================================== */
.tab-canvas-wrapper {
  width: 100%;
  height: 100%;
  background: #FFF;
  position: relative;
  overflow: hidden;
}

.tab-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* ====================================================================
   BARRA DE TRANSPORTE FLUTUANTE
   ==================================================================== */
.floating-transport-bar {
  height: 54px;
  background: rgba(255, 255, 255, 0.92);
  border-top: 1px solid rgba(215, 220, 230, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 35;
}

.transport-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.transport-btn {
  height: 32px;
  padding: 0 14px;
  border-radius: 7px;
  border: 1px solid rgba(200, 205, 215, 0.8);
  background: #FFF;
  color: var(--text-main);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  transition: all 0.12s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.transport-btn:hover {
  background: rgba(245, 247, 250, 0.9);
  border-color: rgba(180, 185, 195, 0.9);
}

.transport-btn.play-btn {
  background: var(--accent-green);
  color: #FFF;
  border-color: var(--accent-green);
  width: 36px;
  padding: 0;
  font-size: 14px;
}

.transport-btn.stop-btn {
  background: #FFF;
  color: var(--accent-red);
  border-color: rgba(255, 59, 48, 0.3);
  width: 36px;
  padding: 0;
}

.transport-btn.rec-btn {
  color: var(--accent-red);
  font-weight: 700;
}

.transport-btn.active {
  background: rgba(0, 122, 255, 0.12);
  color: var(--accent-blue);
  border-color: var(--accent-blue);
}

.transport-divider {
  width: 1px;
  height: 20px;
  background: rgba(200, 205, 215, 0.7);
  margin: 0 4px;
}

.bpm-control-box {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(0, 0, 0, 0.03);
  padding: 3px 8px;
  border-radius: 6px;
}

.bpm-label {
  font-size: 10px;
  font-weight: 700;
  color: var(--text-tertiary);
}

.bpm-input {
  width: 44px;
  height: 24px;
  border: 1px solid rgba(200, 205, 215, 0.8);
  border-radius: 4px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.bpm-slider {
  width: 60px;
}

.transport-exercise-info {
  font-size: 12px;
  color: var(--text-secondary);
}

.transport-exercise-info strong {
  color: var(--text-main);
}

/* ====================================================================
   OVERLAYS / BENTO GRIDS
   ==================================================================== */
.view-overlay-layer {
  position: absolute;
  top: 52px;
  left: 0;
  right: 0;
  bottom: 54px;
  background: rgba(245, 247, 250, 0.94);
  backdrop-filter: blur(25px);
  -webkit-backdrop-filter: blur(25px);
  z-index: 45;
  overflow-y: auto;
  padding: 24px;
}

.overlay-panel {
  max-width: 1100px;
  margin: 0 auto;
}

.panel-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 20px;
  border-bottom: 1px solid rgba(215, 220, 230, 0.8);
  padding-bottom: 14px;
}

.panel-header h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
}

.panel-subtitle {
  font-size: 12.5px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.close-overlay-btn {
  background: none;
  border: none;
  font-size: 24px;
  color: var(--text-tertiary);
  cursor: pointer;
  line-height: 1;
}

.close-overlay-btn:hover {
  color: var(--text-main);
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 16px;
}

.bento-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.bento-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
}

.bento-card.full-width {
  grid-column: 1 / -1;
}

.daw-btn-preset {
  height: 28px;
  padding: 0 12px;
  border-radius: 6px;
  border: 1px solid rgba(200, 205, 215, 0.8);
  background: #FFF;
  color: var(--text-main);
  font-size: 11.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.12s ease;
}

.daw-btn-preset.primary {
  background: var(--accent-blue);
  color: #FFF;
  border-color: var(--accent-blue);
}

.daw-btn-preset.active {
  background: rgba(0, 122, 255, 0.12);
  color: var(--accent-blue);
  border-color: var(--accent-blue);
}

/* ====================================================================
   AFINADOR CROMÁTICO (TUNER)
   ==================================================================== */
.tuner-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.tuner-meter-card {
  width: 360px;
  background: #FFF;
  border-radius: 16px;
  border: 1px solid var(--card-border);
  padding: 24px;
  box-shadow: var(--glass-shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.tuner-arc-wrapper {
  width: 260px;
  height: 130px;
  position: relative;
  border-bottom: 2px solid rgba(0,0,0,0.1);
  overflow: hidden;
}

.tuner-needle {
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 3px;
  height: 115px;
  background: var(--accent-red);
  transform-origin: bottom center;
  transform: translateX(-50%) rotate(0deg);
  transition: transform 0.08s linear, background-color 0.2s;
  border-radius: 2px;
}

.tuner-needle.in-tune {
  background: var(--accent-green);
  box-shadow: 0 0 12px rgba(52, 199, 89, 0.8);
}

.tuner-center-pin {
  position: absolute;
  bottom: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 14px;
  height: 14px;
  background: #1D1D1F;
  border-radius: 50%;
  border: 2px solid #FFF;
}

.tuner-readout {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.tuner-note-name {
  font-size: 54px;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--text-main);
  line-height: 1;
}

.tuner-cents-val {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--text-secondary);
}

.tuner-freq-val {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-tertiary);
}

.tuner-status-pill {
  margin-top: 6px;
  font-size: 10px;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(0,0,0,0.06);
  color: var(--text-secondary);
  letter-spacing: 0.5px;
}

.tuner-controls {
  margin-top: 18px;
  display: flex;
  gap: 10px;
}

.tuner-strings-reference {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.tuner-string-btn {
  width: 50px;
  height: 50px;
  border-radius: 10px;
  background: #FFF;
  border: 1px solid var(--card-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,0.04);
  transition: all 0.12s;
}

.tuner-string-btn:hover {
  border-color: var(--accent-blue);
  transform: translateY(-2px);
}

.tuner-string-btn .str-num {
  font-size: 9px;
  color: var(--text-tertiary);
  font-weight: 700;
}

.tuner-string-btn .str-note {
  font-size: 15px;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--text-main);
}

/* ====================================================================
   PEDALEIRA VIRTUAL (MULTI-FX RACK)
   ==================================================================== */
.pedalboard-rack {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.pedal-chassis {
  width: 200px;
  border-radius: 12px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  box-shadow: 0 8px 24px rgba(0,0,0,0.15), inset 0 1px 1px rgba(255,255,255,0.4);
  border: 1px solid rgba(0,0,0,0.2);
  color: #FFF;
}

.ts-pedal { background: linear-gradient(180deg, #1C7B38 0%, #0E4F22 100%); }
.chorus-pedal { background: linear-gradient(180deg, #1A649C 0%, #0C3E64 100%); }
.delay-pedal { background: linear-gradient(180deg, #7A288A 0%, #4D1258 100%); }
.reverb-pedal { background: linear-gradient(180deg, #C26315 0%, #7E3B06 100%); }

.pedal-brand {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.pedal-led {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #333;
  margin-bottom: 12px;
  border: 1px solid rgba(255,255,255,0.3);
  transition: all 0.15s;
}

.pedal-led.active {
  background: #FF3B30;
  box-shadow: 0 0 10px #FF3B30;
}

.ts-pedal .pedal-led.active {
  background: #FF3B30;
  box-shadow: 0 0 10px #FF3B30;
}

.pedal-knobs {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.knob-box {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.knob-box label {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.5px;
  opacity: 0.9;
}

.knob-box span {
  font-size: 10px;
  font-family: var(--font-mono);
  align-self: flex-end;
  opacity: 0.8;
}

.pedal-footswitch {
  width: 100%;
  height: 34px;
  background: linear-gradient(180deg, #EEEEEE 0%, #B8B8B8 100%);
  border: 1px solid #777;
  border-radius: 8px;
  color: #111;
  font-size: 11px;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 4px 6px rgba(0,0,0,0.3);
  transition: transform 0.05s ease;
}

.pedal-footswitch:active {
  transform: scale(0.96);
  box-shadow: 0 2px 3px rgba(0,0,0,0.4);
}

/* ====================================================================
   TREINO DE OUVIDO (EAR LAB)
   ==================================================================== */
.earlab-game-card {
  max-width: 600px;
  margin: 0 auto;
  background: #FFF;
  border-radius: 16px;
  border: 1px solid var(--card-border);
  padding: 24px;
  box-shadow: var(--glass-shadow);
}

.earlab-stats-row {
  display: flex;
  justify-content: space-around;
  margin-bottom: 20px;
  border-bottom: 1px solid rgba(0,0,0,0.06);
  padding-bottom: 14px;
}

.ear-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.ear-stat .lbl {
  font-size: 9.5px;
  font-weight: 700;
  color: var(--text-tertiary);
}

.ear-stat .val {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 800;
  color: var(--text-main);
}

.earlab-prompt-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  text-align: center;
}

.earlab-options-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.ear-option-btn {
  height: 48px;
  background: rgba(245, 247, 250, 0.9);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.12s;
}

.ear-option-btn:hover {
  background: #FFF;
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  transform: translateY(-2px);
}

.ear-option-btn.correct {
  background: var(--accent-green) !important;
  color: #FFF !important;
  border-color: var(--accent-green) !important;
}

.ear-option-btn.wrong {
  background: var(--accent-red) !important;
  color: #FFF !important;
  border-color: var(--accent-red) !important;
}

/* ====================================================================
   MOBILE DRAWER & RESPONSIVIDADE
   ==================================================================== */
.mobile-pane-switcher {
  display: none;
}

@media (max-width: 900px) {
  .mobile-menu-btn {
    display: block;
  }

  .sidebar-metal {
    position: fixed;
    top: 42px;
    bottom: 0;
    left: -260px;
    transition: left 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .sidebar-metal.open {
    left: 0;
  }

  .mobile-pane-switcher {
    display: flex;
    gap: 4px;
    background: rgba(0, 0, 0, 0.05);
    padding: 3px;
    border-radius: 8px;
    margin: 6px 12px;
  }

  .mobile-pane-pill {
    flex: 1;
    border: none;
    background: transparent;
    padding: 6px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
  }

  .mobile-pane-pill.active {
    background: #FFF;
    color: var(--text-main);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
  }
}

/* ====================================================================
   GRADE DE LEVADAS & ARPEJOS (DAW STRUMMING MATRIX)
   ==================================================================== */
.strumming-matrix-wrapper {
  width: 100%;
  height: 100%;
  background: #FFF;
  display: flex;
  flex-direction: column;
  padding: 12px 16px;
  overflow-x: auto;
  overflow-y: hidden;
  user-select: none;
}

.matrix-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  flex-shrink: 0;
  gap: 10px;
  flex-wrap: wrap;
}

.matrix-presets-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.matrix-grid {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
  min-width: 680px;
  justify-content: center;
}

.matrix-step-headers {
  display: flex;
  gap: 4px;
  margin-bottom: 2px;
}

.matrix-row-label-placeholder {
  width: 140px;
  flex-shrink: 0;
}

.matrix-header-cell {
  flex: 1;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--text-tertiary);
  padding: 2px 0;
}

.matrix-header-cell.beat-start {
  color: var(--accent-blue);
  font-weight: 800;
  border-bottom: 2px solid var(--accent-blue);
}

.matrix-row {
  display: flex;
  gap: 4px;
  align-items: center;
}

.matrix-row-label {
  width: 140px;
  flex-shrink: 0;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 6px;
}

.matrix-row-label .row-icon {
  font-size: 13px;
  width: 18px;
  text-align: center;
}

.matrix-step-btn {
  flex: 1;
  height: 28px;
  background: rgba(240, 243, 248, 0.7);
  border: 1px solid rgba(215, 220, 230, 0.8);
  border-radius: 5px;
  cursor: pointer;
  transition: all 0.08s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: transparent;
}

.matrix-step-btn:hover {
  background: rgba(225, 232, 242, 0.9);
  border-color: rgba(180, 190, 205, 0.9);
}

.matrix-step-btn.active.row-down {
  background: var(--accent-blue);
  color: #FFF;
  border-color: var(--accent-blue);
  box-shadow: 0 2px 6px rgba(0, 122, 255, 0.4);
}

.matrix-step-btn.active.row-up {
  background: var(--accent-green);
  color: #FFF;
  border-color: var(--accent-green);
  box-shadow: 0 2px 6px rgba(52, 199, 89, 0.4);
}

.matrix-step-btn.active.row-mute {
  background: var(--accent-red);
  color: #FFF;
  border-color: var(--accent-red);
  box-shadow: 0 2px 6px rgba(255, 59, 48, 0.4);
}

.matrix-step-btn.active.row-bass {
  background: var(--accent-amber);
  color: #FFF;
  border-color: var(--accent-amber);
  box-shadow: 0 2px 6px rgba(255, 149, 0, 0.4);
}

.matrix-step-btn.active.row-index,
.matrix-step-btn.active.row-middle {
  background: var(--accent-purple);
  color: #FFF;
  border-color: var(--accent-purple);
  box-shadow: 0 2px 6px rgba(175, 82, 222, 0.4);
}

.matrix-step-btn.playhead {
  outline: 2px solid var(--accent-amber);
  outline-offset: -1px;
  filter: brightness(1.25);
}

/* ====================================================================
   CIFRA CLUB STYLE CHORD CAROUSEL, DIAGRAMS & VARIATIONS MODAL
   ==================================================================== */

/* 1. Fretboard Chord Toolbar (Dock Superior do Braço) */
.fretboard-chord-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
}

.fb-chord-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(0, 0, 0, 0.05);
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 6px;
  padding: 3px 8px;
}

.fb-chord-sym {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 13px;
  color: var(--accent-amber);
}

.fb-chord-var {
  font-size: 10.5px;
  font-weight: 600;
  color: var(--text-secondary);
}

.fb-stepper {
  display: flex;
  align-items: center;
  gap: 2px;
  background: rgba(0, 0, 0, 0.04);
  border-radius: 6px;
  padding: 2px;
  border: 1px solid rgba(0, 0, 0, 0.08);
}

.fb-step-btn {
  width: 22px;
  height: 22px;
  border: none;
  background: transparent;
  color: var(--text-main);
  border-radius: 4px;
  font-size: 10px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.12s;
}

.fb-step-btn:hover {
  background: rgba(0, 0, 0, 0.08);
}

.fb-step-idx {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--text-main);
  padding: 0 4px;
}

/* 2. Horizontal Chord Strip / Carousel (Dark Cifra Club Style) */
.chord-carousel-section {
  background: #121214;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 14px 16px;
  margin-bottom: 20px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
}

.carousel-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.carousel-section-title {
  font-size: 12.5px;
  font-weight: 800;
  color: #FF9500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.carousel-section-hint {
  font-size: 11px;
  color: #8E8E93;
}

.carousel-arrows {
  display: flex;
  gap: 6px;
}

.carousel-arrow-btn {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #2C2C2E;
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #FFF;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.carousel-arrow-btn:hover {
  background: #3A3A3C;
  border-color: #FF9500;
  color: #FF9500;
}

.chord-carousel-track {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  scroll-behavior: smooth;
  padding: 6px 2px 10px 2px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: #3A3A3C transparent;
}

.chord-carousel-track::-webkit-scrollbar {
  height: 6px;
}

.chord-carousel-track::-webkit-scrollbar-thumb {
  background: #3A3A3C;
  border-radius: 3px;
}

/* Container e elemento SVG do diagrama de acordes */
.chord-strip-svg-box {
  width: 114px;
  height: 152px;
  min-width: 114px;
  min-height: 152px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 6px;
  overflow: visible;
  flex-shrink: 0;
}

.chord-diagram-svg {
  width: 114px !important;
  height: 152px !important;
  min-width: 114px !important;
  min-height: 152px !important;
  display: block !important;
  flex-shrink: 0;
}

/* Card individual da faixa de acordes */
.chord-strip-card {
  width: 126px;
  min-width: 126px;
  min-height: 240px;
  background: #1C1C1E;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 10px 6px 12px 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
  user-select: none;
  flex-shrink: 0;
}

.chord-strip-card:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 149, 0, 0.6);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.45);
}

.chord-strip-card.active {
  border-color: #FF9500;
  box-shadow: 0 0 16px rgba(255, 149, 0, 0.45);
  background: #222226;
}

/* Botão Variar exato do print do usuário */
.btn-chord-variar {
  background: #2C2C2E;
  color: #FFFFFF;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 20px;
  padding: 5px 14px;
  font-size: 11px;
  font-weight: 700;
  margin-top: 6px;
  width: 86%;
  text-align: center;
  cursor: pointer;
  transition: all 0.12s ease;
}

.btn-chord-variar:hover {
  background: #3A3A3C;
  border-color: #FF9500;
  color: #FF9500;
}

.chord-strip-card.active .btn-chord-variar {
  border-color: #FF9500;
  color: #FF9500;
}

/* Ações rápidas no card */
.chord-strip-actions {
  display: flex;
  gap: 4px;
  margin-top: 6px;
  width: 100%;
  justify-content: center;
}

.strip-action-btn {
  background: transparent;
  border: none;
  color: #8E8E93;
  font-size: 10.5px;
  font-weight: 600;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  transition: all 0.12s;
}

.strip-action-btn:hover {
  color: #FFF;
  background: rgba(255, 255, 255, 0.1);
}

/* 3. Cards Bento Grid Atualizados (Estilo Dark Cifra Club) */
.chord-bento-card {
  background: #1C1C1E;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 14px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
  display: flex;
  gap: 14px;
  align-items: center;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.chord-bento-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 149, 0, 0.45);
}

.chord-bento-diagram {
  flex-shrink: 0;
}

.chord-bento-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
}

.chord-bento-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.chord-bento-num {
  font-size: 11px;
  font-weight: 800;
  color: var(--accent-green);
}

.chord-bento-cat {
  font-size: 10px;
  font-weight: 700;
  background: rgba(52, 199, 89, 0.12);
  color: var(--accent-green);
  padding: 2px 7px;
  border-radius: 4px;
}

.chord-bento-title {
  font-size: 17px;
  font-weight: 800;
  font-family: var(--font-mono);
  color: #FF9500;
  margin-bottom: 2px;
}

.chord-bento-name {
  font-size: 12px;
  font-weight: 600;
  color: #E5E5EA;
  margin-bottom: 6px;
}

.chord-bento-desc {
  font-size: 11px;
  color: #8E8E93;
  line-height: 1.4;
  margin-bottom: 10px;
}

.chord-bento-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

/* 4. Modal de Variações de Acorde (Conforme Print 3 do Usuário) */
.chord-var-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 120;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.chord-var-modal-card {
  background: #1C1C1E;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 18px;
  width: 100%;
  max-width: 820px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.8);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: modalPopIn 0.18s ease-out;
}

@keyframes modalPopIn {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

.var-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.var-chord-title-badge {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 800;
  color: #FF9500;
}

.var-chord-subtitle {
  font-size: 12px;
  color: #8E8E93;
}

.var-modal-body {
  display: flex;
  align-items: center;
  padding: 20px 14px;
  gap: 10px;
  position: relative;
}

.var-scroll-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: #2C2C2E;
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #FFF;
  font-size: 20px;
  font-weight: 700;
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.12s;
}

.var-scroll-btn:hover {
  background: #3A3A3C;
  border-color: #FF9500;
  color: #FF9500;
}

.var-cards-container {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  padding: 6px 4px;
  scroll-behavior: smooth;
  flex: 1;
  scrollbar-width: thin;
  scrollbar-color: #3A3A3C transparent;
}

.var-cards-container::-webkit-scrollbar {
  height: 6px;
}

.var-cards-container::-webkit-scrollbar-thumb {
  background: #3A3A3C;
  border-radius: 3px;
}

.var-item-card {
  min-width: 130px;
  width: 130px;
  background: #242426;
  border: 1.5px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 10px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
}

.var-item-card:hover {
  border-color: rgba(255, 149, 0, 0.5);
  transform: translateY(-2px);
}

.var-item-card.selected {
  border-color: #FF9500;
  box-shadow: 0 0 16px rgba(255, 149, 0, 0.45);
  background: #2A2A2E;
}

.var-item-label {
  font-size: 10.5px;
  font-weight: 700;
  color: #E5E5EA;
  margin-top: 8px;
  text-align: center;
  line-height: 1.3;
}

.var-item-card.selected .var-item-label {
  color: #FF9500;
}

.var-modal-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: #161618;
  flex-wrap: wrap;
  gap: 10px;
}

.var-toggle-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: #8E8E93;
  cursor: pointer;
  user-select: none;
}

.var-toggle-label input[type="checkbox"] {
  accent-color: #FF9500;
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.var-footer-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-reset-round {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #2C2C2E;
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #E5E5EA;
  font-size: 15px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.12s;
}

.btn-reset-round:hover {
  background: #3A3A3C;
  color: #FFF;
}

.btn-apply-round {
  background: #FFFFFF !important;
  color: #1C1C1E !important;
  border: none !important;
  border-radius: 20px !important;
  padding: 0 20px !important;
  height: 32px !important;
  font-size: 12px !important;
  font-weight: 700 !important;
  cursor: pointer;
  transition: all 0.12s;
}

.btn-apply-round:hover {
  opacity: 0.9;
  transform: scale(1.02);
}

/* Animação de pulso nas casas do braço ao variar */
@keyframes chordBubblePulse {
  0% { transform: scale(1); filter: drop-shadow(0 0 2px #FF9500); }
  50% { transform: scale(1.28); filter: drop-shadow(0 0 10px #FF9500); }
  100% { transform: scale(1); }
}

.fret-note-bubble.chord-pulse {
  animation: chordBubblePulse 0.45s ease-out;
}

/* ====================================================================
   17. MASTERCLASS MODERNA: FUSION, PROG METAL & TÉCNICAS MISTAS
   ==================================================================== */

.masterclass-header {
  border-bottom: 1px solid rgba(56, 189, 248, 0.2);
  padding-bottom: 16px;
  margin-bottom: 16px;
}

.masterclass-badge-top {
  display: inline-block;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  background: linear-gradient(90deg, #38bdf8, #818cf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 4px;
}

/* Faixa dos Mestres */
.masterclass-masters-bar {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding: 4px 2px 14px 2px;
  margin-bottom: 14px;
  scrollbar-width: thin;
}

.master-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(210, 215, 225, 0.7);
  border-radius: 12px;
  padding: 8px 14px;
  min-width: 220px;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.master-chip:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
}

.master-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 13px;
  color: #FFF;
  flex-shrink: 0;
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

.master-info h4 {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}

.master-info span {
  font-size: 11px;
  color: var(--text-secondary);
}

.master-info .master-style {
  font-size: 10px;
  font-weight: 600;
  color: #0284c7;
  display: block;
}

/* Navegador de Módulos (Tabs) */
.masterclass-nav-strip {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 2px 14px 2px;
  margin-bottom: 18px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  scrollbar-width: thin;
}

.masterclass-tab-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(210, 215, 225, 0.7);
  border-radius: 10px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}

.masterclass-tab-btn:hover {
  background: rgba(255, 255, 255, 0.9);
  color: var(--text-main);
}

.masterclass-tab-btn.active {
  background: linear-gradient(135deg, #0284c7 0%, #4f46e5 100%);
  border-color: transparent;
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.35);
}

.masterclass-tab-btn .mod-pill {
  font-size: 10px;
  font-weight: 800;
  background: rgba(0, 0, 0, 0.08);
  padding: 2px 6px;
  border-radius: 4px;
}

.masterclass-tab-btn.active .mod-pill {
  background: rgba(255, 255, 255, 0.25);
  color: #FFF;
}

/* Container de Conteúdo */
.masterclass-body-container {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding-bottom: 40px;
}

/* Module Header Banner */
.master-module-banner {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(30, 27, 75, 0.95) 100%);
  border-radius: 14px;
  padding: 22px 24px;
  color: #FFFFFF;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.15);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.master-module-banner::before {
  content: '';
  position: absolute;
  top: -50px;
  right: -50px;
  width: 160px;
  height: 160px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.3) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.banner-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.banner-icon {
  font-size: 36px;
  background: rgba(255, 255, 255, 0.1);
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.banner-title-box h3 {
  font-size: 20px;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 4px;
}

.banner-title-box p {
  font-size: 13px;
  color: #cbd5e1;
}

.banner-badge {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
  background: rgba(56, 189, 248, 0.2);
  border: 1px solid #38bdf8;
  color: #38bdf8;
  padding: 4px 10px;
  border-radius: 20px;
}

/* Seções Teóricas */
.master-section-block {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 20px 22px;
}

.master-section-block h3 {
  font-size: 16px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 10px;
  border-left: 4px solid var(--accent-blue);
  padding-left: 10px;
}

.master-section-block p {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

/* Callouts */
.master-callout {
  border-radius: 10px;
  padding: 12px 16px;
  margin: 14px 0;
  border-left: 4px solid;
}

.master-callout-warning {
  background: rgba(255, 149, 0, 0.08);
  border-color: #ff9500;
  color: #8c5300;
}

.master-callout-info {
  background: rgba(0, 122, 255, 0.08);
  border-color: #007aff;
  color: #004fb3;
}

.master-callout-success {
  background: rgba(52, 199, 89, 0.08);
  border-color: #34c759;
  color: #176b2e;
}

.master-callout .callout-title {
  font-size: 12.5px;
  font-weight: 800;
  margin-bottom: 4px;
}

.master-callout p {
  font-size: 12px;
  line-height: 1.5;
  margin: 0;
  color: inherit;
}

/* Grids 2 e 3 */
.master-grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
  margin-top: 12px;
}

.master-grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
  margin-top: 12px;
}

.master-step-card {
  display: flex;
  gap: 12px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(210, 215, 225, 0.6);
  border-radius: 12px;
  padding: 14px;
}

.master-step-card .step-num {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: #0284c7;
  color: #FFF;
  font-weight: 800;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* Exercise Cards */
.master-exercise-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.master-exercise-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 8px;
}

.master-exercise-title h4 {
  font-size: 16px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 4px;
}

.master-exercise-title span {
  font-size: 12px;
  color: var(--text-secondary);
}

.master-badge-bar {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  align-items: center;
}

.badge-nivel {
  font-size: 10px;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(175, 82, 222, 0.12);
  color: #af52de;
}

.badge-tempo {
  font-size: 10px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(0, 122, 255, 0.1);
  color: #007aff;
}

.badge-focus {
  font-size: 10px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(255, 149, 0, 0.12);
  color: #d97706;
}

/* Visualizador de Tablatura */
.master-tab-block {
  background: #090d16;
  border: 1px solid #1e293b;
  border-radius: 10px;
  padding: 14px 16px;
  overflow-x: auto;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.4);
}

.master-tab-pre {
  font-family: 'JetBrains Mono', 'Fira Code', Menlo, monospace;
  font-size: 11.5px;
  line-height: 1.5;
  color: #cbd5e1;
  margin: 0;
  white-space: pre;
}

.master-tab-pre .pick {
  color: #38bdf8;
  font-weight: 700;
}

.master-tab-pre .finger {
  color: #34d399;
  font-weight: 600;
}

.master-tab-pre .meta {
  color: #94a3b8;
}

/* Ações do Exercício */
.master-actions-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.btn-practice-master {
  background: linear-gradient(135deg, #0284c7 0%, #4f46e5 100%) !important;
  color: #FFFFFF !important;
  border: none !important;
  font-weight: 700 !important;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.3) !important;
  padding: 8px 18px !important;
  border-radius: 8px !important;
  font-size: 12.5px !important;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
}

.btn-practice-master:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(2, 132, 199, 0.4) !important;
}

.btn-view-fretboard-master {
  background: rgba(255, 255, 255, 0.8) !important;
  color: var(--text-main) !important;
  border: 1px solid rgba(210, 215, 225, 0.8) !important;
  font-weight: 600 !important;
  padding: 8px 14px !important;
  border-radius: 8px !important;
  font-size: 12px !important;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-view-fretboard-master:hover {
  background: #FFF !important;
  border-color: #007aff !important;
}

/* Rotinas e Diário (Módulo 7) */
.master-routine-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.master-routine-card.featured {
  border-color: #0284c7;
  box-shadow: 0 6px 20px rgba(2, 132, 199, 0.15);
  background: linear-gradient(180deg, rgba(2, 132, 199, 0.04) 0%, rgba(255, 255, 255, 0.85) 100%);
}

.routine-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.routine-header h4 {
  font-size: 15px;
  font-weight: 800;
  color: var(--text-main);
}

.routine-steps {
  list-style: none;
  padding: 0;
  margin: 10px 0 16px 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.master-timer-display {
  background: #090d16;
  border: 1px solid #1e293b;
  border-radius: 12px;
  padding: 16px;
  text-align: center;
  margin: 14px 0;
  color: #38bdf8;
}

.master-timer-readout {
  font-family: 'JetBrains Mono', monospace;
  font-size: 38px;
  font-weight: 800;
  letter-spacing: 2px;
}

/* Tabela do Diário */
.master-journal-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
  margin-top: 10px;
}

.master-journal-table th {
  background: rgba(0, 0, 0, 0.04);
  color: var(--text-secondary);
  font-weight: 700;
  padding: 8px 10px;
  text-align: left;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.master-journal-table td {
  padding: 8px 10px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  color: var(--text-main);
}