frontend/src/index.css

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Noto+Sans+Devanagari:wght@300;400;500;600;700&display=swap');

@tailwind base;
@tailwind components;
@tailwind utilities;

/* Voice Cloning App Design System - AI-themed with bilingual support */

@layer base {
  :root {
    /* Core backgrounds and surfaces */
    --background: 240 10% 3.9%;
    --foreground: 210 40% 98%;
    --surface: 240 10% 7%;
    --surface-elevated: 240 9% 12%;

    /* AI-themed brand colors */
    --primary: 262 83% 58%;
    --primary-foreground: 210 40% 98%;
    --primary-glow: 262 100% 70%;
    
    --secondary: 240 10% 15%;
    --secondary-foreground: 210 40% 98%;
    
    --accent: 196 75% 50%;
    --accent-foreground: 210 40% 98%;
    --accent-glow: 196 100% 60%;

    /* UI elements */
    --card: 240 10% 7%;
    --card-foreground: 210 40% 98%;
    --border: 240 10% 18%;
    --input: 240 10% 12%;
    --ring: 262 83% 58%;
    
    /* Interactive states */
    --muted: 240 5% 25%;
    --muted-foreground: 240 5% 64%;
    --destructive: 0 84% 60%;
    --destructive-foreground: 210 40% 98%;

    /* Audio visualization */
    --waveform-primary: 262 83% 58%;
    --waveform-secondary: 196 75% 50%;
    --audio-glow: 262 100% 70%;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, hsl(262 83% 58%), hsl(196 75% 50%));
    --gradient-surface: linear-gradient(135deg, hsl(240 10% 7%), hsl(240 9% 12%));
    --gradient-glow: radial-gradient(circle at center, hsl(262 100% 70% / 0.3), transparent 70%);
    
    /* Shadows and effects */
    --shadow-glow: 0 0 50px hsl(262 83% 58% / 0.3);
    --shadow-accent: 0 0 30px hsl(196 75% 50% / 0.2);
    --shadow-elevated: 0 10px 40px hsl(240 10% 3.9% / 0.5);

    /* Popover elements */
    --popover: 240 10% 7%;
    --popover-foreground: 210 40% 98%;

    --radius: 0.75rem;
  }

  .light {
    /* Light mode for future extensibility */
    --background: 0 0% 100%;
    --foreground: 240 10% 3.9%;
    --surface: 240 5% 96%;
    --surface-elevated: 0 0% 100%;
    
    --primary: 262 83% 48%;
    --primary-foreground: 210 40% 98%;
    --primary-glow: 262 83% 58%;
    
    --card: 0 0% 100%;
    --card-foreground: 240 10% 3.9%;
    --border: 240 5% 89%;
    --input: 240 5% 96%;
    --ring: 262 83% 48%;
    
    --muted: 240 5% 96%;
    --muted-foreground: 240 5% 45%;
    
    --gradient-primary: linear-gradient(135deg, hsl(262 83% 48%), hsl(196 75% 40%));
    --shadow-glow: 0 0 50px hsl(262 83% 48% / 0.2);
  }
}

@layer base {
  * {
    @apply border-border;
  }

  body {
    @apply bg-background text-foreground font-sans antialiased;
    font-family: 'Inter', 'Noto Sans Devanagari', system-ui, sans-serif;
  }

  /* Custom scrollbar */
  ::-webkit-scrollbar {
    width: 8px;
  }
  
  ::-webkit-scrollbar-track {
    @apply bg-surface;
  }
  
  ::-webkit-scrollbar-thumb {
    @apply bg-muted rounded-full;
  }
  
  ::-webkit-scrollbar-thumb:hover {
    @apply bg-muted-foreground;
  }
}

@layer components {
  /* Waveform animation */
  .waveform-bar {
    @apply bg-gradient-to-t from-primary to-accent;
    animation: waveform 1.5s ease-in-out infinite;
  }
  
  .waveform-bar:nth-child(2) { animation-delay: 0.1s; }
  .waveform-bar:nth-child(3) { animation-delay: 0.2s; }
  .waveform-bar:nth-child(4) { animation-delay: 0.3s; }
  .waveform-bar:nth-child(5) { animation-delay: 0.4s; }

  /* Glow effects */
  .glow-primary {
    box-shadow: var(--shadow-glow);
  }
  
  .glow-accent {
    box-shadow: var(--shadow-accent);
  }

  /* Recording pulse */
  .recording-pulse {
    animation: pulse-glow 2s ease-in-out infinite;
  }

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

  /* Hindi text optimization */
  .hindi-text {
    font-family: 'Noto Sans Devanagari', 'Inter', system-ui, sans-serif;
    line-height: 1.7;
  }
}

@layer utilities {
  .glass-effect {
    @apply bg-surface/50 backdrop-blur-xl border border-border/50;
  }
  
  .surface-elevated {
    @apply bg-surface-elevated shadow-elevated;
  }
}

@keyframes waveform {
  0%, 100% { transform: scaleY(0.3); }
  50% { transform: scaleY(1); }
}

@keyframes pulse-glow {
  0%, 100% { 
    box-shadow: 0 0 20px hsl(var(--primary) / 0.5);
  }
  50% { 
    box-shadow: 0 0 40px hsl(var(--primary) / 0.8), 0 0 60px hsl(var(--primary) / 0.4);
  }
}

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