/**
 * Design Tokens
 * Centralized design system variables — Notion-inspired minimal palette
 * All design decisions should reference these tokens
 */

:root {
    /* ========================================
       COLOR PALETTE
       ======================================== */
    
    /* Primary Colors */
    --color-primary-50: #eff6ff;
    --color-primary-100: #dbeafe;
    --color-primary-200: #bfdbfe;
    --color-primary-300: #93c5fd;
    --color-primary-400: #60a5fa;
    --color-primary-500: #3b82f6;
    --color-primary-600: #2563eb;
    --color-primary-700: #1d4ed8;
    --color-primary-800: #1e40af;
    --color-primary-900: #1e3a8a;
    --color-primary: #013bc1;
    
    /* Secondary Colors */
    --color-secondary-50: #f0f9ff;
    --color-secondary-100: #e0f2fe;
    --color-secondary-200: #bae6fd;
    --color-secondary-300: #7dd3fc;
    --color-secondary-400: #38bdf8;
    --color-secondary-500: #0ea5e9;
    --color-secondary-600: #0284c7;
    --color-secondary-700: #0369a1;
    --color-secondary-800: #075985;
    --color-secondary-900: #0c4a6e;
    --color-secondary: #0284C7;
    
    /* Accent Colors */
    --color-accent-50: #fffbeb;
    --color-accent-100: #fef3c7;
    --color-accent-200: #fde68a;
    --color-accent-300: #fcd34d;
    --color-accent-400: #fbbf24;
    --color-accent-500: #f59e0b;
    --color-accent-600: #d97706;
    --color-accent-700: #b45309;
    --color-accent-800: #92400e;
    --color-accent-900: #78350f;
    --color-accent: #F59E0B;
    
    /* Success Colors */
    --color-success-50: #f0fdf4;
    --color-success-100: #dcfce7;
    --color-success-200: #bbf7d0;
    --color-success-300: #86efac;
    --color-success-400: #4ade80;
    --color-success-500: #22c55e;
    --color-success-600: #16a34a;
    --color-success-700: #15803d;
    --color-success-800: #166534;
    --color-success-900: #14532d;
    --color-success: #22c55e;
    
    /* Warning Colors */
    --color-warning-50: #fffbeb;
    --color-warning-100: #fef3c7;
    --color-warning-200: #fde68a;
    --color-warning-300: #fcd34d;
    --color-warning-400: #fbbf24;
    --color-warning-500: #f59e0b;
    --color-warning-600: #d97706;
    --color-warning-700: #b45309;
    --color-warning-800: #92400e;
    --color-warning-900: #78350f;
    --color-warning: #f59e0b;
    
    /* Error/Danger Colors */
    --color-error-50: #fef2f2;
    --color-error-100: #fee2e2;
    --color-error-200: #fecaca;
    --color-error-300: #fca5a5;
    --color-error-400: #f87171;
    --color-error-500: #ef4444;
    --color-error-600: #dc2626;
    --color-error-700: #b91c1c;
    --color-error-800: #991b1b;
    --color-error-900: #7f1d1d;
    --color-error: #ef4444;
    
    /* Neutral/Gray Colors — Notion-inspired warm grays */
    --color-gray-50: #FAFAFA;
    --color-gray-100: #F5F5F5;
    --color-gray-200: #EBEBEB;
    --color-gray-300: #D6D6D4;
    --color-gray-400: #ACACAA;
    --color-gray-500: #777672;
    --color-gray-600: #5A5955;
    --color-gray-700: #37352F;
    --color-gray-800: #2B2926;
    --color-gray-900: #1B1B18;
    
    /* Background Colors */
    --color-background: #FFFFFF;
    --color-background-secondary: #FFFFFF;
    --color-background-tertiary: #F5F5F5;
    
    /* Text Colors — Notion warm grays */
    --color-text: #37352F;
    --color-text-secondary: #777672;
    --color-text-tertiary: #ACACAA;
    --color-text-muted: #D6D6D4;
    --color-text-inverse: #ffffff;
    
    /* Border Colors */
    --color-border: #EBEBEB;
    --color-border-light: #F5F5F5;
    --color-border-dark: #D6D6D4;
    
    /* Hover */
    --color-hover: rgba(0, 0, 0, 0.04);
    
    /* ========================================
       TYPOGRAPHY
       ======================================== */
    
    /* Font Families — Inter only for minimal aesthetic */
    --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;
    --font-display: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Font Sizes */
    --text-xs: 0.75rem;      /* 12px */
    --text-sm: 0.875rem;     /* 14px */
    --text-base: 1rem;       /* 16px */
    --text-lg: 1.125rem;     /* 18px */
    --text-xl: 1.25rem;      /* 20px */
    --text-2xl: 1.5rem;      /* 24px */
    --text-3xl: 1.875rem;    /* 30px */
    --text-4xl: 2.25rem;     /* 36px */
    --text-5xl: 3rem;        /* 48px */
    --text-6xl: 3.75rem;     /* 60px */
    
    /* Line Heights */
    --leading-none: 1;
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;
    
    /* Font Weights */
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    
    /* Letter Spacing */
    --tracking-tighter: -0.05em;
    --tracking-tight: -0.025em;
    --tracking-normal: 0;
    --tracking-wide: 0.025em;
    --tracking-wider: 0.05em;
    --tracking-widest: 0.1em;
    
    /* ========================================
       SPACING
       ======================================== */
    
    --space-0: 0;
    --space-1: 0.25rem;      /* 4px */
    --space-2: 0.5rem;       /* 8px */
    --space-3: 0.75rem;      /* 12px */
    --space-4: 1rem;         /* 16px */
    --space-5: 1.25rem;      /* 20px */
    --space-6: 1.5rem;       /* 24px */
    --space-8: 2rem;         /* 32px */
    --space-10: 2.5rem;      /* 40px */
    --space-12: 3rem;        /* 48px */
    --space-16: 4rem;        /* 64px */
    --space-20: 5rem;        /* 80px */
    --space-24: 6rem;        /* 96px */
    --space-32: 8rem;        /* 128px */
    
    /* ========================================
       BORDER RADIUS — Notion-style subtle
       ======================================== */
    
    --radius-none: 0;
    --radius-sm: 2px;
    --radius-base: 4px;
    --radius-md: 5px;
    --radius-lg: 6px;
    --radius-xl: 8px;
    --radius-2xl: 12px;
    --radius-3xl: 16px;
    --radius-full: 9999px;
    
    /* ========================================
       SHADOWS — Lighter, Notion-inspired
       ======================================== */
    
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: rgba(15, 15, 15, 0.1) 0px 0px 0px 1px, rgba(15, 15, 15, 0.06) 0px 3px 6px;
    --shadow-lg: rgba(15, 15, 15, 0.1) 0px 0px 0px 1px, rgba(15, 15, 15, 0.1) 0px 5px 10px, rgba(15, 15, 15, 0.06) 0px 15px 40px;
    --shadow-xl: rgba(15, 15, 15, 0.1) 0px 0px 0px 1px, rgba(15, 15, 15, 0.1) 0px 5px 10px, rgba(15, 15, 15, 0.1) 0px 20px 50px;
    --shadow-2xl: rgba(15, 15, 15, 0.15) 0px 0px 0px 1px, rgba(15, 15, 15, 0.15) 0px 10px 20px, rgba(15, 15, 15, 0.1) 0px 30px 60px;
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.04);
    
    /* ========================================
       TRANSITIONS
       ======================================== */
    
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    --transition-slower: 500ms ease;
    
    /* Timing Functions */
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* ========================================
       Z-INDEX SCALE
       ======================================== */
    
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-popover: 600;
    --z-tooltip: 700;
    --z-toast: 800;
    
    /* ========================================
       BREAKPOINTS (for reference)
       ======================================== */
    
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
    --breakpoint-2xl: 1536px;
}