:root {
  /* Brand Colors */
  --brand-primary: #0369a1;
  --brand-secondary: #7c3aed;
  --brand-accent: #0ea5e9;
  --accent-color: #3b82f6;

  /* Neutral Colors */
  --neutral-0: #ffffff;
  --neutral-50: #f8fafc;
  --neutral-100: #f1f5f9;
  --neutral-200: #e2e8f0;
  --neutral-300: #cbd5e1;
  --neutral-400: #94a3b8;
  --neutral-500: #64748b;
  --neutral-600: #475569;
  --neutral-700: #334155;
  --neutral-800: #1e293b;
  --neutral-900: #0f172a;

  /* Feedback Colors */
  --feedback-success: #059669;
  --feedback-warning: #f59e0b;
  --feedback-error: #dc2626;
  --feedback-success-subtle: rgba(5, 150, 105, 0.1);
  --feedback-error-subtle: rgba(239, 68, 68, 0.1);
  --feedback-warning-subtle: rgba(245, 158, 11, 0.1);
  --text-on-accent: var(--neutral-0);

  /* Fonts */
  --font-primary: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-secondary: "Source Serif 4", serif;
  --font-mono: "Roboto Mono", monospace;

  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* New Typographic Scale */
  --font-size-xs: 0.8rem;    
  --font-size-sm: 0.9rem;  
  --font-size-base: 1rem;   
  --font-size-md: 1.2rem;  
  --font-size-lg: 1.5rem;   
  --font-size-xl: 1.75rem;  
  --font-size-2xl: 2rem;   
  --font-size-3xl: 2.5rem;  /* 40px */
  --font-size-4xl: 3rem;    /* 48px */

  /* Line Heights */
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  /* Letter Spacing */
  --letter-spacing-xs: 0.025em;
  --letter-spacing-sm: 0.05em;
  --letter-spacing-md: 0.075em;


  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;

  /* Borders */
  --border-radius-sm: 4px;
  --border-radius-md: 6px;
  --border-radius-lg: 8px;
  --border-radius-xl: 24px;
  --border-radius-pill: 50px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-inner: inset 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 12px 48px rgba(0,0,0,0.08);
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-2xl: 64px;
  --spacing-3xl: 96px;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;

  --ease-apple: cubic-bezier(0.25, 0.1, 0.25, 1);
  --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-dopamine: cubic-bezier(0.175, 0.885, 0.32, 1.175);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --ease-dramatic: cubic-bezier(0.25, 0.46, 0.45, 0.94);

  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 350ms;
  --duration-elegant: 600ms;
  --duration-dopamine-bounce: 400ms;
  --duration-transformation: 800ms;
  --duration-stagger-base: 100ms;
}