:root {
  /* Color Palette - Light Theme (Default) */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-surface: rgba(255, 255, 255, 0.94);
  --bg-surface-hover: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.88);
  --border-subtle: rgba(15, 23, 42, 0.10);
  --border-focus: rgba(2, 132, 199, 0.5);
  --border-glow: rgba(2, 132, 199, 0.2);

  /* Accent & Brand Colors */
  --accent-cyan: #0284c7;
  --accent-cyan-glow: rgba(2, 132, 199, 0.2);
  --accent-indigo: #4f46e5;
  --accent-violet: #7c3aed;
  --accent-emerald: #10b981;
  --accent-rose: #f43f5e;
  --accent-amber: #f59e0b;

  /* Gradients */
  --grad-primary: linear-gradient(135deg, #0284c7 0%, #4f46e5 50%, #7c3aed 100%);
  --grad-surface: linear-gradient(180deg, rgba(255, 255, 255, 0.95) 0%, rgba(241, 245, 249, 0.8) 100%);
  --grad-glow: radial-gradient(circle at 50% 0%, rgba(2, 132, 199, 0.1), transparent 70%);

  /* Text Colors */
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  /* Typography */
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing & Layout */
  --container-max: 1200px;
  --container-padding: clamp(1rem, 5vw, 2.5rem);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  /* Glassmorphism & Effects */
  --glass-blur: blur(16px);
  --glass-border: 1px solid var(--border-subtle);
  --shadow-sm: 0 2px 4px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 28px -4px rgba(0, 0, 0, 0.12);
  --shadow-cyan: 0 0 20px rgba(2, 132, 199, 0.15);
  --shadow-indigo: 0 0 25px rgba(79, 70, 229, 0.15);

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-surface: rgba(255, 255, 255, 0.94);
  --bg-surface-hover: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.88);
  --border-subtle: rgba(15, 23, 42, 0.10);
  --border-focus: rgba(2, 132, 199, 0.5);
  --border-glow: rgba(2, 132, 199, 0.2);

  --accent-cyan: #0284c7;
  --accent-cyan-glow: rgba(2, 132, 199, 0.2);
  --accent-indigo: #4f46e5;
  --accent-violet: #7c3aed;

  --grad-primary: linear-gradient(135deg, #0284c7 0%, #4f46e5 50%, #7c3aed 100%);
  --grad-surface: linear-gradient(180deg, rgba(255, 255, 255, 0.95) 0%, rgba(241, 245, 249, 0.8) 100%);
  --grad-glow: radial-gradient(circle at 50% 0%, rgba(2, 132, 199, 0.1), transparent 70%);

  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  --shadow-sm: 0 2px 4px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 28px -4px rgba(0, 0, 0, 0.12);
  --shadow-cyan: 0 0 20px rgba(2, 132, 199, 0.15);
  --shadow-indigo: 0 0 25px rgba(79, 70, 229, 0.15);
}