/* ==========================================================================
   THEME & DESIGN SYSTEM TOKENS
   Universal QR, Barcode & Code Generator Suite
   ========================================================================== */

:root {
  /* Color Palette - Dark Mode Default (Obsidian & Electric Cyan) */
  --bg-base: #07090e;
  --bg-primary: #0d121f;
  --bg-surface: #141b2d;
  --bg-surface-elevated: #1b243b;
  --bg-glass: rgba(20, 27, 45, 0.72);
  --bg-glass-card: rgba(27, 36, 59, 0.55);
  --bg-preview-canvas: #ffffff;
  --bg-preview-wrapper: #0d121f;

  /* Accent & Gradients */
  --accent-cyan: #06b6d4;
  --accent-cyan-light: #22d3ee;
  --accent-blue: #3b82f6;
  --accent-indigo: #6366f1;
  --accent-teal: #14b8a6;
  --accent-gradient: linear-gradient(135deg, #06b6d4 0%, #3b82f6 50%, #6366f1 100%);
  --accent-gradient-hover: linear-gradient(135deg, #22d3ee 0%, #60a5fa 50%, #818cf8 100%);
  --accent-glow: 0 0 24px rgba(6, 182, 212, 0.35);

  /* Borders & Dividers */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.14);
  --border-focus: #06b6d4;
  --border-glow: 0 0 0 2px rgba(6, 182, 212, 0.25);

  /* Typography Colors */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-on-accent: #ffffff;

  /* State Colors */
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.14);
  --success-border: rgba(16, 185, 129, 0.3);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.14);
  --warning-border: rgba(245, 158, 11, 0.3);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.14);
  --danger-border: rgba(239, 68, 68, 0.3);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;

  /* Elevations & Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 8px 28px rgba(0, 0, 0, 0.45);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.55);
  --shadow-card: 0 8px 32px 0 rgba(0, 0, 0, 0.37);

  /* Spacing & Radii */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 350ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Theme Variables Toggle */
[data-theme="light"] {
  --bg-base: #f1f5f9;
  --bg-primary: #ffffff;
  --bg-surface: #f8fafc;
  --bg-surface-elevated: #e2e8f0;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --bg-glass-card: rgba(248, 250, 252, 0.85);
  --bg-preview-canvas: #ffffff;
  --bg-preview-wrapper: #f1f5f9;

  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-medium: rgba(0, 0, 0, 0.16);
  --border-focus: #0284c7;
  --border-glow: 0 0 0 2px rgba(2, 132, 199, 0.25);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);
}