/* =============================================
   DJ Mixer Pro - Design Profissional Moderno
   ============================================= */

/* --- CSS Custom Properties (Variáveis) --- */
:root {
  /* Cores Principais - Gradientes Modernos */
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --success-gradient: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
  --warning-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
  --danger-gradient: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
  
  /* Cores de Fundo - Design Glassmorphism */
  --bg-primary: #0a0a0f;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #16213e;
  --bg-glass: rgba(26, 26, 46, 0.8);
  --bg-overlay: rgba(0, 0, 0, 0.4);
  --bg-card: rgba(255, 255, 255, 0.05);
  --bg-hover: rgba(255, 255, 255, 0.1);
  
  /* Cores de Texto */
  --text-primary: #ffffff;
  --text-secondary: #b8b8d4;
  --text-muted: #6b6b8a;
  --text-accent: #667eea;
  
  /* Cores de Estado */
  --success: #43e97b;
  --warning: #fa709a;
  --error: #ff6b6b;
  --info: #4facfe;
  
  /* Sombras Modernas */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.12);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.24);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.32);
  --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.3);
  
  /* Bordas */
  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 16px;
  --border-radius-xl: 24px;
  --border-radius-full: 50%;
  
  /* Transições */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Espaçamentos */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Tipografia */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  
  /* Z-Index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-popover: 1050;
  --z-tooltip: 1060;
}

/* Tema Escuro (Padrão) */
[data-theme="dark"] {
  --bg-primary: #0a0a0f;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #16213e;
  --text-primary: #ffffff;
  --text-secondary: #b8b8d4;
  --bg-glass: rgba(26, 26, 46, 0.8);
}

/* Tema Claro */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --bg-glass: rgba(255, 255, 255, 0.9);
  --bg-card: rgba(0, 0, 0, 0.05);
  --bg-hover: rgba(0, 0, 0, 0.1);
}

/* --- Reset e Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  font-size: var(--font-size-base);
  font-weight: 400;
}

/* --- Loading Screen --- */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-content {
  text-align: center;
  max-width: 400px;
  padding: var(--spacing-xl);
}

.loading-logo {
  font-size: 4rem;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: var(--spacing-lg);
  animation: pulse 2s infinite;
  filter: drop-shadow(0 0 20px rgba(102, 126, 234, 0.3));
}

.loading-text {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  font-weight: 500;
}

.loading-bar {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
  position: relative;
}

.loading-progress {
  height: 100%;
  background: var(--primary-gradient);
  border-radius: 3px;
  animation: loading 2s infinite;
  position: relative;
}

.loading-progress::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation: shimmer 1.5s infinite;
}

@keyframes loading {
  0% { width: 0%; }
  50% { width: 70%; }
  100% { width: 100%; }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* --- Header --- */
.header {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
  padding: var(--spacing-xl) var(--spacing-md);
  text-align: center;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 80%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(245, 87, 108, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.header-content {
  position: relative;
  z-index: 1;
}

.header-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  letter-spacing: -0.02em;
}

.header-title i {
  font-size: 0.8em;
  filter: drop-shadow(0 0 10px rgba(102, 126, 234, 0.5));
}

.header-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--text-secondary);
  font-weight: 400;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.5;
}

.theme-toggle {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  background: var(--bg-glass);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-full);
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-normal);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-md);
}

.theme-toggle:hover {
  background: var(--bg-hover);
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

.theme-toggle:active {
  transform: scale(0.95);
}

/* --- Container Principal --- */
.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.player-container {
  flex: 1;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  padding-top: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
}

/* --- Visualizador --- */
.visualizer-section {
  position: relative;
  height: 280px;
  border-radius: var(--border-radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  background: var(--bg-secondary);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

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

.visualizer-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, var(--bg-overlay) 0%, transparent 100%);
  pointer-events: none;
}

.visualizer-controls {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  display: flex;
  gap: var(--spacing-sm);
}

.visualizer-btn {
  background: var(--bg-glass);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-md);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-normal);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-md);
}

.visualizer-btn:hover {
  background: var(--bg-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.visualizer-btn.active {
  background: var(--primary-gradient);
  color: var(--bg-primary);
  box-shadow: var(--shadow-glow);
}

/* --- Player Principal --- */
.main-player-section {
  background: var(--bg-glass);
  backdrop-filter: blur(30px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.main-player-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 80%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(245, 87, 108, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.main-player-section::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, transparent 0%, rgba(255, 255, 255, 0.02) 50%, transparent 100%);
  pointer-events: none;
}

.player-info {
  display: flex;
  align-items: center;
  margin-bottom: var(--spacing-xl);
  position: relative;
  z-index: 1;
  gap: var(--spacing-lg);
}

.album-art {
  width: 100px;
  height: 100px;
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
  transition: all var(--transition-normal);
}

.album-art:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-xl);
}

.album-art::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: inherit;
  filter: blur(30px);
  opacity: 0.4;
  transform: scale(1.3);
}

.album-art i {
  position: relative;
  z-index: 1;
  color: rgba(255, 255, 255, 0.95);
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

/* Cores para as capas dos álbuns */
.color-1 { background: var(--primary-gradient); }
.color-2 { background: var(--secondary-gradient); }
.color-3 { background: var(--accent-gradient); }
.color-4 { background: var(--success-gradient); }
.color-5 { background: var(--warning-gradient); }
.color-6 { background: var(--danger-gradient); }

.track-details {
  flex: 1;
  min-width: 0;
}

.track-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.track-artist {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  font-weight: 500;
  line-height: 1.4;
}

/* --- Barra de Progresso --- */
.progress-container {
  position: relative;
  width: 100%;
  height: 10px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--border-radius-sm);
  margin: var(--spacing-xl) 0;
  cursor: pointer;
  transition: all var(--transition-normal);
  overflow: hidden;
}

.progress-container:hover {
  height: 12px;
  background: rgba(255, 255, 255, 0.12);
}

.progress-buffer {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--border-radius-sm);
  width: 0%;
  transition: width var(--transition-fast);
}

.progress-bar {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: var(--primary-gradient);
  border-radius: var(--border-radius-sm);
  width: 0%;
  transition: width var(--transition-fast);
  box-shadow: var(--shadow-glow);
  position: relative;
}

.progress-bar::after {
  content: '';
  position: absolute;
  right: -8px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  background: var(--primary-gradient);
  border-radius: var(--border-radius-full);
  box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.2), var(--shadow-md);
  opacity: 0;
  transition: all var(--transition-normal);
}

.progress-container:hover .progress-bar::after {
  opacity: 1;
  transform: translateY(-50%) scale(1.1);
}

.time-display {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}

.time-separator {
  margin: 0 var(--spacing-xs);
  opacity: 0.6;
}

/* --- Controles do Player --- */
.player-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.control-btn {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  width: 56px;
  height: 56px;
  border-radius: var(--border-radius-full);
  color: var(--text-primary);
  font-size: var(--font-size-lg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.control-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--primary-gradient);
  opacity: 0;
  transition: opacity var(--transition-normal);
  border-radius: inherit;
}

.control-btn:hover::before {
  opacity: 0.15;
}

.control-btn:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 255, 255, 0.2);
}

.control-btn:active {
  transform: translateY(-1px);
}

.control-btn i {
  position: relative;
  z-index: 1;
  transition: transform var(--transition-fast);
}

.control-btn:hover i {
  transform: scale(1.1);
}

.main-play-pause {
  width: 80px;
  height: 80px;
  font-size: var(--font-size-2xl);
  background: var(--primary-gradient);
  border: none;
  box-shadow: var(--shadow-lg);
}

.main-play-pause::before {
  background: rgba(255, 255, 255, 0.2);
}

.main-play-pause:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.control-btn.active {
  background: var(--primary-gradient);
  color: var(--bg-primary);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

/* --- Volume Control --- */
.volume-control {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
}

.volume-icon {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  min-width: 24px;
  transition: color var(--transition-normal);
}

.volume-control:hover .volume-icon {
  color: var(--text-primary);
}

.volume-slider {
  flex: 1;
  height: 8px;
  -webkit-appearance: none;
  appearance: none;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-sm);
  outline: none;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.volume-slider:hover {
  background: rgba(255, 255, 255, 0.15);
}

.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: var(--border-radius-full);
  background: var(--primary-gradient);
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  border: 2px solid rgba(255, 255, 255, 0.2);
}

.volume-slider::-webkit-slider-thumb:hover {
  transform: scale(1.3);
  box-shadow: var(--shadow-lg), 0 0 0 6px rgba(102, 126, 234, 0.2);
}

.volume-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: var(--border-radius-full);
  background: var(--primary-gradient);
  cursor: pointer;
  border: 2px solid rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-md);
}

.volume-display {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  min-width: 48px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

/* --- Mixer de Faixas --- */
.track-mixer-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  background: var(--bg-glass);
  backdrop-filter: blur(30px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.track-mixer-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 30% 70%, rgba(102, 126, 234, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 70% 30%, rgba(245, 87, 108, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.track-control {
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-normal);
  position: relative;
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-md);
}

.track-control:hover {
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.deck-a {
  border-left: 4px solid var(--success);
}

.deck-b {
  border-left: 4px solid var(--warning);
}

.track-control h3 {
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-primary);
  font-size: var(--font-size-lg);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.track-select {
  width: 100%;
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-md);
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  outline: none;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
}

.track-select:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: var(--bg-hover);
}

.track-select:focus {
  border-color: var(--success);
  box-shadow: 0 0 0 3px rgba(67, 233, 123, 0.1);
}

.volume-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  background: var(--bg-card);
  border-radius: var(--border-radius-md);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
}

.volume-value {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  min-width: 40px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

.deck-controls {
  display: flex;
  gap: var(--spacing-md);
}

.deck-play-pause {
  background: var(--primary-gradient);
  flex: 1;
  border-radius: var(--border-radius-md);
  height: 48px;
  width: auto;
  font-size: var(--font-size-lg);
  font-weight: 600;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.deck-play-pause:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.deck-cue-btn {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-md);
  padding: 0 var(--spacing-lg);
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  transition: all var(--transition-normal);
  white-space: nowrap;
  backdrop-filter: blur(10px);
  font-weight: 500;
}

.deck-cue-btn:hover {
  background: var(--bg-hover);
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.2);
}

.deck-cue-btn.active {
  background: var(--warning-gradient);
  color: var(--bg-primary);
  border-color: transparent;
  box-shadow: var(--shadow-md);
}

/* --- Equalizador --- */
.equalizer-section {
  background: var(--bg-glass);
  backdrop-filter: blur(30px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.equalizer-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 80%, rgba(102, 126, 234, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(245, 87, 108, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.equalizer-section h3 {
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-primary);
  font-size: var(--font-size-xl);
  font-weight: 700;
  letter-spacing: -0.01em;
  position: relative;
  z-index: 1;
}

.eq-preset-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
}

.eq-preset-container label {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.eq-preset-container select {
  flex: 1;
  padding: var(--spacing-md);
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-md);
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  outline: none;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
}

.eq-preset-container select:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
}

.eq-preset-container select:focus {
  border-color: var(--success);
  box-shadow: 0 0 0 3px rgba(67, 233, 123, 0.1);
}

.eq-reset-btn {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-md);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}

.eq-reset-btn:hover {
  background: var(--bg-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.equalizer-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--spacing-xl);
}

.eq-band {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
  position: relative;
}

.eq-band:hover {
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.eq-band-label {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  font-weight: 600;
  text-align: center;
  letter-spacing: 0.02em;
}

.eq-band-slider {
  -webkit-appearance: slider-vertical;
  appearance: slider-vertical;
  width: 10px;
  height: 140px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-sm);
  outline: none;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.eq-band-slider:hover {
  background: rgba(255, 255, 255, 0.15);
}

.eq-band-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: var(--border-radius-full);
  background: var(--primary-gradient);
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  border: 2px solid rgba(255, 255, 255, 0.2);
}

.eq-band-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: var(--shadow-lg), 0 0 0 6px rgba(102, 126, 234, 0.2);
}

.eq-band-value {
  font-size: var(--font-size-xs);
  color: var(--text-primary);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  min-height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* --- Efeitos --- */
.effects-section {
  background: var(--bg-glass);
  backdrop-filter: blur(30px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.effects-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 30% 70%, rgba(102, 126, 234, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 70% 30%, rgba(245, 87, 108, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.effects-section h3 {
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-primary);
  font-size: var(--font-size-xl);
  font-weight: 700;
  letter-spacing: -0.01em;
  position: relative;
  z-index: 1;
}

.effects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-lg);
}

.effect-btn {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  transition: all var(--transition-normal);
  text-align: center;
  min-height: 100px;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
}

.effect-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--primary-gradient);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.effect-btn:hover::before {
  opacity: 0.15;
}

.effect-btn:hover {
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.effect-btn.active {
  background: var(--primary-gradient);
  color: var(--bg-primary);
  border-color: transparent;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.effect-btn i {
  font-size: var(--font-size-2xl);
  position: relative;
  z-index: 1;
  transition: transform var(--transition-fast);
}

.effect-btn:hover i {
  transform: scale(1.1);
}

.effect-btn span {
  position: relative;
  z-index: 1;
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* --- Drum Pad --- */
.drum-pad-section {
  background: var(--bg-glass);
  backdrop-filter: blur(30px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.drum-pad-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 30% 70%, rgba(102, 126, 234, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 70% 30%, rgba(245, 87, 108, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.drum-pad-section h3 {
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-primary);
  font-size: var(--font-size-xl);
  font-weight: 700;
  letter-spacing: -0.01em;
  position: relative;
  z-index: 1;
}

.drum-pad-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.drum-pad {
  aspect-ratio: 1/1;
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  min-height: 100px;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
}

.drum-pad::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--primary-gradient);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.drum-pad:hover::before {
  opacity: 0.15;
}

.drum-pad:hover {
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.drum-pad.playing {
  transform: scale(0.95);
  background: rgba(102, 126, 234, 0.3);
  border-color: var(--success);
  box-shadow: 0 0 30px rgba(102, 126, 234, 0.5);
}

.drum-pad.playing::before {
  opacity: 0.4;
}

.drum-pad-key {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
  position: relative;
  z-index: 1;
  letter-spacing: -0.02em;
}

.drum-pad-label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  font-weight: 600;
  position: relative;
  z-index: 1;
  letter-spacing: 0.02em;
}

/* --- Paleta de Cores --- */
.color-palette-section {
  background: var(--bg-glass);
  backdrop-filter: blur(30px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.color-palette-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 30% 70%, rgba(102, 126, 234, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 70% 30%, rgba(245, 87, 108, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.color-palette-section h3 {
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-primary);
  font-size: var(--font-size-xl);
  font-weight: 700;
  letter-spacing: -0.01em;
  position: relative;
  z-index: 1;
}

.color-palette-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.color-box {
  aspect-ratio: 1/1;
  border-radius: var(--border-radius-lg);
  cursor: pointer;
  transition: all var(--transition-normal);
  border: 3px solid transparent;
  position: relative;
  overflow: hidden;
  min-height: 80px;
  box-shadow: var(--shadow-md);
}

.color-box:nth-child(1) { background: var(--primary-gradient); }
.color-box:nth-child(2) { background: var(--secondary-gradient); }
.color-box:nth-child(3) { background: var(--accent-gradient); }
.color-box:nth-child(4) { background: var(--success-gradient); }
.color-box:nth-child(5) { background: var(--warning-gradient); }
.color-box:nth-child(6) { background: var(--danger-gradient); }

.color-box:hover {
  transform: scale(1.1) translateY(-3px);
  box-shadow: var(--shadow-xl);
}

.color-box.active {
  border-color: var(--text-primary);
  box-shadow: 0 0 0 6px rgba(255, 255, 255, 0.2), var(--shadow-lg);
}

.color-tip {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  text-align: center;
  font-style: italic;
  position: relative;
  z-index: 1;
}

/* --- Playlist --- */
.playlist-section {
  background: var(--bg-glass);
  backdrop-filter: blur(30px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.playlist-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 30% 70%, rgba(102, 126, 234, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 70% 30%, rgba(245, 87, 108, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.playlist-section h3 {
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-primary);
  font-size: var(--font-size-xl);
  font-weight: 700;
  letter-spacing: -0.01em;
  position: relative;
  z-index: 1;
}

.playlist-controls {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  position: relative;
  z-index: 1;
}

.playlist-control-btn {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-sm);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  font-weight: 500;
}

.playlist-control-btn:hover {
  background: var(--bg-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.playlist-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-sm);
  max-height: 400px;
  overflow-y: auto;
  padding-right: var(--spacing-sm);
  position: relative;
  z-index: 1;
}

.playlist-grid::-webkit-scrollbar {
  width: 8px;
}

.playlist-grid::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-sm);
}

.playlist-grid::-webkit-scrollbar-thumb {
  background: var(--primary-gradient);
  border-radius: var(--border-radius-sm);
}

.playlist-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  background: var(--bg-card);
  cursor: pointer;
  transition: all var(--transition-normal);
  border: 1px solid transparent;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}

.playlist-item:hover {
  background: var(--bg-hover);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
}

.playlist-item.playing {
  background: rgba(102, 126, 234, 0.2);
  border-color: var(--success);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1), var(--shadow-md);
}

.playlist-art {
  width: 60px;
  height: 60px;
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  box-shadow: var(--shadow-md);
  flex-shrink: 0;
}

.playlist-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  min-width: 0;
}

.playlist-track {
  font-size: var(--font-size-base);
  color: var(--text-primary);
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.3;
}

.playlist-artist {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-weight: 500;
}

.playlist-duration {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  font-weight: 600;
}

/* --- Modal --- */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  backdrop-filter: blur(10px);
}

.modal-content {
  background: var(--bg-secondary);
  border-radius: var(--border-radius-xl);
  max-width: 500px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-xl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.modal-header h3 {
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-lg);
  font-weight: 700;
}

.modal-close {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  font-size: var(--font-size-xl);
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-md);
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}

.modal-close:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
}

.modal-body {
  padding: var(--spacing-xl);
}

.modal-body p {
  color: var(--text-secondary);
  line-height: 1.6;
  font-size: var(--font-size-base);
}

/* --- Footer --- */
.footer {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
  padding: var(--spacing-2xl) var(--spacing-md);
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: auto;
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 80%, rgba(102, 126, 234, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(245, 87, 108, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.footer-content {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.footer-title {
  font-size: var(--font-size-lg);
  color: var(--text-primary);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.01em;
}

.footer-subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  font-weight: 500;
}

.footer-help {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  font-style: italic;
  font-weight: 500;
}

/* --- Animações --- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
  from { transform: translateX(-100%); }
  to { transform: translateX(0); }
}

@keyframes bounce {
  0%, 20%, 53%, 80%, 100% { transform: translate3d(0, 0, 0); }
  40%, 43% { transform: translate3d(0, -15px, 0); }
  70% { transform: translate3d(0, -8px, 0); }
  90% { transform: translate3d(0, -3px, 0); }
}

@keyframes glow {
  0%, 100% { box-shadow: 0 0 10px rgba(102, 126, 234, 0.3); }
  50% { box-shadow: 0 0 30px rgba(102, 126, 234, 0.6); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

.fade-in {
  animation: fadeIn 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide-in {
  animation: slideIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.bounce {
  animation: bounce 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.glow {
  animation: glow 3s infinite;
}

.pulse {
  animation: pulse 2s infinite;
}

.float {
  animation: float 3s ease-in-out infinite;
}

/* --- Responsividade --- */
@media (max-width: 1400px) {
  .player-container {
    max-width: 1200px;
    padding: 0 var(--spacing-lg);
  }
}

@media (max-width: 1200px) {
  .player-container {
    max-width: 1000px;
    gap: var(--spacing-lg);
  }
  
  .equalizer-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .effects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 1024px) {
  .track-mixer-section {
    grid-template-columns: 1fr;
  }
  
  .color-palette-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .main-player-section,
  .track-mixer-section,
  .equalizer-section,
  .effects-section,
  .drum-pad-section,
  .color-palette-section,
  .playlist-section {
    padding: var(--spacing-xl);
  }
}

@media (max-width: 768px) {
  .player-container {
    padding: 0 var(--spacing-md);
    gap: var(--spacing-lg);
  }
  
  .header-title {
    font-size: clamp(2rem, 5vw, 2.5rem);
  }
  
  .header-subtitle {
    font-size: clamp(0.9rem, 2.5vw, 1rem);
  }
  
  .theme-toggle {
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 48px;
    height: 48px;
  }
  
  .player-info {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-md);
  }
  
  .album-art {
    margin-bottom: var(--spacing-md);
  }
  
  .player-controls {
    gap: var(--spacing-md);
  }
  
  .control-btn {
    width: 52px;
    height: 52px;
  }
  
  .main-play-pause {
    width: 72px;
    height: 72px;
  }
  
  .drum-pad-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .color-palette-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .equalizer-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .effects-grid {
    grid-template-columns: 1fr;
  }
  
  .visualizer-section {
    height: 220px;
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 0.75rem;
    --spacing-lg: 1rem;
    --spacing-xl: 1.5rem;
    --spacing-2xl: 2rem;
  }
  
  .header {
    padding: var(--spacing-lg) var(--spacing-md);
  }
  
  .main-player-section,
  .track-mixer-section,
  .equalizer-section,
  .effects-section,
  .drum-pad-section,
  .color-palette-section,
  .playlist-section {
    padding: var(--spacing-lg);
  }
  
  .visualizer-section {
    height: 180px;
  }
  
  .drum-pad-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .color-palette-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .equalizer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .eq-band-slider {
    height: 100px;
  }
  
  .playlist-item {
    grid-template-columns: auto 1fr;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
  }
  
  .playlist-duration {
    display: none;
  }
  
  .album-art {
    width: 80px;
    height: 80px;
    font-size: 2rem;
  }
  
  .track-title {
    font-size: var(--font-size-lg);
  }
  
  .track-artist {
    font-size: var(--font-size-sm);
  }
}

/* --- Melhorias de Performance --- */
* {
  will-change: auto;
}

.visualizer-canvas {
  will-change: transform;
}

.progress-bar {
  will-change: width;
}

.drum-pad.playing {
  will-change: transform, background-color;
}

/* --- Acessibilidade --- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-contrast: high) {
  :root {
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --bg-primary: #000000;
    --bg-secondary: #111111;
    --bg-card: rgba(255, 255, 255, 0.2);
    --bg-hover: rgba(255, 255, 255, 0.3);
  }
}

@media (prefers-color-scheme: light) {
  :root {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --bg-glass: rgba(255, 255, 255, 0.9);
    --bg-card: rgba(0, 0, 0, 0.05);
    --bg-hover: rgba(0, 0, 0, 0.1);
  }
}

/* --- Estados de Foco --- */
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--success);
  outline-offset: 3px;
  border-radius: var(--border-radius-sm);
}

/* --- Utilitários --- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.hidden { display: none !important; }
.visible { display: block !important; }

.no-scroll { overflow: hidden; }

/* --- Glassmorphism Utilities --- */
.glass {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow-md);
}

/* --- Gradient Text --- */
.gradient-text {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* --- Hover Effects --- */
.hover-lift {
  transition: transform var(--transition-normal);
}

.hover-lift:hover {
  transform: translateY(-3px);
}

.hover-scale {
  transition: transform var(--transition-normal);
}

.hover-scale:hover {
  transform: scale(1.05);
}

/* --- Print Styles --- */
@media print {
  .header,
  .footer,
  .visualizer-section,
  .drum-pad-section,
  .color-palette-section,
  .theme-toggle,
  .visualizer-controls {
    display: none;
  }
  
  .player-container {
    max-width: none;
    padding: 0;
    gap: var(--spacing-md);
  }
  
  .main-player-section,
  .track-mixer-section,
  .equalizer-section,
  .effects-section,
  .playlist-section {
    break-inside: avoid;
    page-break-inside: avoid;
  }
  
  * {
    background: white !important;
    color: black !important;
    box-shadow: none !important;
    border: 1px solid #ddd !important;
  }
  
  .track-title,
  .track-artist {
    color: black !important;
  }
}