/* Design System Variables */
:root {
  /* Colors */
  --color-primary: #007aff;
  --color-primary-hover: #0056b3;
  --color-primary-light: rgba(0, 122, 255, 0.1);
  
  --color-secondary: #f2f2f7;
  --color-secondary-hover: #e5e5ea;
  
  --color-background: #f5f5f7;
  --color-surface: #ffffff;
  --color-surface-elevated: #fafafa;
  
  --color-text-primary: #1d1d1f;
  --color-text-secondary: #86868b;
  --color-text-tertiary: #c7c7cc;
  
  --color-border: #d1d1d6;
  --color-border-light: #e5e5e7;
  --color-border-focus: var(--color-primary);
  
  --color-success: #2d5a2d;
  --color-success-bg: #e8f5e8;
  --color-success-border: #c3e6c3;
  --color-success-light: #4a7c59;
  --color-success-dark: #1e3a2e;
  
  --color-error: #d32f2f;
  --color-error-bg: #ffe5e5;
  --color-error-border: #ffb3b3;
  
  --color-info: #e3f2fd;
  --color-info-border: var(--color-primary);
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-mono: 'SF Mono', Monaco, 'Cascadia Code', monospace;
  
  --font-size-xs: 12px;
  --font-size-sm: 13px;
  --font-size-base: 14px;
  --font-size-md: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 32px;
  
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.6;
  
  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-base: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 50%;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-base: 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
  --transition-slow: 0.3s ease;
  
  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-tooltip: 1050;
  
  /* Header */
  --header-height: 120px;
  
  /* Breakpoints */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
}