/**
 * Voice Changer - GreenGetWare Theme
 * Enhanced UI/UX Version
 */

:root {
  --primary: #39d353;
  --primary-dark: #176f3c;
  --primary-hover: #2fb344;
  --primary-light: rgba(57, 211, 83, 0.15);
  --primary-gradient: linear-gradient(135deg, #39d353 0%, #176f3c 100%);
  --accent: #00c9ff;
  --accent-gradient: linear-gradient(135deg, #00c9ff 0%, #0099cc 100%);
  --secondary: #64748b;
  --success: #39d353;
  --warning: #f59e0b;
  --danger: #ef4444;
  --danger-gradient: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  
  --bg-primary: #0a0a14;
  --bg-secondary: #12121f;
  --bg-tertiary: #1a1a2e;
  --bg-card: rgba(20, 20, 35, 0.95);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-color: rgba(255, 255, 255, 0.06);
  --border-glow: rgba(57, 211, 83, 0.3);
  
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 60px rgba(57, 211, 83, 0.2);
  
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.95);
  --text-primary: #1a1a2e;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --border-color: rgba(0, 0, 0, 0.08);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  background-image: 
    radial-gradient(ellipse at 20% 0%, rgba(57, 211, 83, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(0, 201, 255, 0.06) 0%, transparent 50%);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.text-gradient {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Header */
.app-header {
  background: var(--bg-card);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: var(--space-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand-section {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.logo i {
  color: var(--primary);
  font-size: 1.75rem;
}

.brand-badge {
  font-size: 0.6875rem;
  color: var(--text-muted);
  font-weight: 500;
}

.header-actions {
  display: flex;
  gap: var(--space-sm);
}

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bg-tertiary);
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  background: var(--primary);
  color: white;
}

.btn-home {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--primary-gradient);
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 4px 15px rgba(57, 211, 83, 0.3);
  transition: all var(--transition-fast);
}

.btn-home:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(57, 211, 83, 0.4);
  color: white;
}

.btn-home span {
  display: none;
}

@media (min-width: 768px) {
  .btn-home span {
    display: inline;
  }
}

/* Main Content */
.main-content {
  padding: var(--space-xl) 0;
}

/* Hero Section */
.hero-section {
  text-align: center;
  margin-bottom: var(--space-xl);
  padding: var(--space-xl) 0;
}

.hero-icon {
  width: 100px;
  height: 100px;
  background: var(--primary-gradient);
  border-radius: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-lg);
  box-shadow: 
    0 0 60px rgba(57, 211, 83, 0.4),
    0 20px 40px rgba(0, 0, 0, 0.3),
    inset 0 -5px 20px rgba(0, 0, 0, 0.2);
  animation: heroFloat 3s ease-in-out infinite;
  position: relative;
}

.hero-icon::before {
  content: '';
  position: absolute;
  inset: -3px;
  background: var(--primary-gradient);
  border-radius: 33px;
  z-index: -1;
  opacity: 0.5;
  filter: blur(15px);
  animation: glowPulse 2s ease-in-out infinite;
}

@keyframes heroFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-10px) rotate(2deg); }
}

@keyframes glowPulse {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 0.8; transform: scale(1.05); }
}

.hero-icon i {
  font-size: 3rem;
  color: white;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
}

.hero-section h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
}

.hero-section p {
  color: var(--text-secondary);
  font-size: 1.125rem;
  max-width: 500px;
  margin: 0 auto;
}

/* App Container */
.app-container {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  padding: var(--space-2xl);
  margin-bottom: var(--space-2xl);
  box-shadow: 
    0 25px 50px rgba(0, 0, 0, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
  position: relative;
  overflow: hidden;
}

.app-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(57, 211, 83, 0.5), transparent);
}

/* Visualizer */
.visualizer-section {
  position: relative;
  background: linear-gradient(180deg, var(--bg-secondary) 0%, rgba(57, 211, 83, 0.05) 100%);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: var(--space-xl);
  border: 1px solid var(--border-color);
  box-shadow: inset 0 0 60px rgba(57, 211, 83, 0.05);
}

#visualizer {
  width: 100%;
  height: 180px;
  display: block;
}

.visualizer-overlay {
  position: absolute;
  top: var(--space-md);
  left: var(--space-md);
  right: var(--space-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.current-effect {
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(10px);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary);
  border: 1px solid rgba(57, 211, 83, 0.3);
  box-shadow: 0 0 20px rgba(57, 211, 83, 0.2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Controls */
.controls-section {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.main-controls {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.control-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-lg) var(--space-xl);
  background: var(--bg-glass);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  min-width: 100px;
  position: relative;
  overflow: hidden;
}

.control-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.05) 0%, transparent 50%);
  pointer-events: none;
}

.control-btn i {
  font-size: 1.75rem;
  transition: transform 0.3s ease;
}

.control-btn:hover:not(:disabled) {
  transform: translateY(-3px);
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.control-btn:hover:not(:disabled) i {
  transform: scale(1.1);
}

.control-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.control-btn.record {
  border-color: rgba(239, 68, 68, 0.5);
  color: var(--danger);
  background: rgba(239, 68, 68, 0.1);
}

.control-btn.record:hover:not(:disabled) {
  background: var(--danger-gradient);
  border-color: var(--danger);
  color: white;
  box-shadow: 0 10px 30px rgba(239, 68, 68, 0.3);
}

.control-btn.record.recording {
  background: var(--danger-gradient);
  border-color: var(--danger);
  color: white;
  animation: recording-pulse 1.5s ease-in-out infinite;
}

@keyframes recording-pulse {
  0%, 100% { 
    box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.6), 0 10px 30px rgba(239, 68, 68, 0.3); 
  }
  50% { 
    box-shadow: 0 0 0 15px rgba(239, 68, 68, 0), 0 10px 30px rgba(239, 68, 68, 0.3); 
  }
}

.control-btn.play {
  border-color: rgba(57, 211, 83, 0.5);
  color: var(--primary);
  background: rgba(57, 211, 83, 0.1);
}

.control-btn.play:hover:not(:disabled) {
  background: var(--primary-gradient);
  border-color: var(--primary);
  color: white;
  box-shadow: 0 10px 30px rgba(57, 211, 83, 0.3);
}

.control-btn.download {
  border-color: rgba(0, 201, 255, 0.5);
  color: var(--accent);
  background: rgba(0, 201, 255, 0.1);
}

.control-btn.download:hover:not(:disabled) {
  background: var(--accent-gradient);
  border-color: var(--accent);
  color: white;
  box-shadow: 0 10px 30px rgba(0, 201, 255, 0.3);
}

.timer {
  font-size: 2.5rem;
  font-weight: 800;
  font-family: 'Inter', monospace;
  color: var(--text-primary);
  letter-spacing: 0.05em;
  text-shadow: 0 0 30px rgba(57, 211, 83, 0.3);
}

/* Effects Section */
.effects-section,
.custom-section,
.upload-section {
  margin-bottom: var(--space-xl);
}

.effects-section h3,
.custom-section h3,
.upload-section h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.effects-section h3 i,
.custom-section h3 i,
.upload-section h3 i {
  color: var(--primary);
}

.effects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: var(--space-sm);
}

.effect-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-sm);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.effect-btn::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary-gradient);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.effect-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.effect-btn:hover::after {
  transform: scaleX(1);
}

.effect-btn.active {
  background: linear-gradient(180deg, rgba(57, 211, 83, 0.15) 0%, rgba(57, 211, 83, 0.05) 100%);
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: 0 0 20px rgba(57, 211, 83, 0.15);
}

.effect-btn.active::after {
  transform: scaleX(1);
}

.effect-icon {
  width: 48px;
  height: 48px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid var(--border-color);
}

.effect-btn.active .effect-icon,
.effect-btn:hover .effect-icon {
  background: var(--primary-gradient);
  border-color: transparent;
  transform: scale(1.05);
  box-shadow: 0 5px 15px rgba(57, 211, 83, 0.3);
}

.effect-icon i {
  font-size: 1.4rem;
  transition: all 0.3s ease;
}

.effect-btn.active .effect-icon i,
.effect-btn:hover .effect-icon i {
  color: white;
  transform: scale(1.1);
}

/* Custom Sliders */
.sliders-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.slider-group {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--bg-glass);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.slider-group:hover {
  border-color: rgba(57, 211, 83, 0.3);
  background: rgba(57, 211, 83, 0.05);
}

.slider-group label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  min-width: 80px;
  font-weight: 500;
}

.slider-group input[type="range"] {
  flex: 1;
  height: 6px;
  background: var(--bg-secondary);
  border-radius: 3px;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}

.slider-group input[type="range"]::-webkit-slider-track {
  background: linear-gradient(90deg, var(--primary) 0%, var(--bg-secondary) 0%);
  border-radius: 3px;
}

.slider-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  background: var(--primary-gradient);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(57, 211, 83, 0.4);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.slider-group input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 4px 15px rgba(57, 211, 83, 0.5);
}

.slider-value {
  font-size: 0.875rem;
  color: var(--primary);
  font-weight: 700;
  min-width: 55px;
  text-align: right;
  background: var(--bg-secondary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
}

.reset-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.reset-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(57, 211, 83, 0.1);
  transform: translateY(-2px);
}

/* Upload Section */
.upload-area {
  background: linear-gradient(180deg, var(--bg-glass) 0%, var(--bg-secondary) 100%);
  border: 2px dashed rgba(57, 211, 83, 0.3);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  text-align: center;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.upload-area::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(57, 211, 83, 0.1) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.upload-area:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: 0 15px 40px rgba(57, 211, 83, 0.15);
}

.upload-area:hover::before {
  opacity: 1;
}

.upload-area i {
  font-size: 3.5rem;
  color: var(--primary);
  margin-bottom: var(--space-md);
  display: block;
  filter: drop-shadow(0 0 20px rgba(57, 211, 83, 0.4));
}

.upload-area p {
  font-size: 1.125rem;
  margin-bottom: var(--space-sm);
  font-weight: 500;
}

.upload-area span {
  font-size: 0.875rem;
  color: var(--text-muted);
  display: block;
}

/* Features Section */
.features-section {
  margin-top: var(--space-2xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--border-color);
}

.features-section h2 {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-xl);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  transition: all var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: var(--primary-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-md);
}

.feature-icon i {
  font-size: 1.75rem;
  color: var(--primary);
}

.feature-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.feature-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Footer */
.app-footer {
  padding: var(--space-xl) 0;
  text-align: center;
  border-top: 1px solid var(--border-color);
  margin-top: var(--space-2xl);
}

.app-footer p {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hero-section h1 {
    font-size: 1.75rem;
  }
  
  .main-controls {
    flex-wrap: wrap;
  }
  
  .control-btn {
    min-width: 70px;
    padding: var(--space-sm) var(--space-md);
  }
  
  .effects-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .sliders-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .effects-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}