/* Design System Variables */
:root {
    /* ===== COLORS ===== */

    /* Primary Brand */
    --color-primary: #284354;
    --color-primary-light: #3a5768;
    --color-primary-dark: #1a2d3a;

    /* Accent */
    --color-accent: #d4a853;
    --color-accent-light: #e6b84d;
    --color-accent-dark: #b88f3a;

    /* Success (CTA) */
    --color-success: #48bb78;
    --color-success-light: #68d391;
    --color-success-dark: #38a169;

    /* Grays */
    --color-gray-50: #fafafa;
    --color-gray-100: #f5f5f5;
    --color-gray-200: #e0e0e0;
    --color-gray-300: #cccccc;
    --color-gray-400: #999999;
    --color-gray-500: #666666;
    --color-gray-600: #4a5568;
    --color-gray-700: #333333;
    --color-gray-800: #2d3748;
    --color-gray-900: #1a1a1a;

    /* Semantic Colors */
    --color-background: #ffffff;
    --color-text-primary: #333333;
    --color-text-secondary: #666666;
    --color-border: #e0e0e0;

    /* Gamification */
    --color-ready: #48bb78;
    --color-partial: #f6ad55;
    --color-not-ready: #fc8181;
    --color-locked: #a0aec0;

    /* Streaks & Points */
    --color-fire: #ed8936;
    --color-gold: #d4a853;

    /* Status Colors */
    --color-error: #f56565;
    --color-warning: #ed8936;
    --color-info: #4299e1;


    /* ===== TYPOGRAPHY ===== */

    /* Font Families */
    --font-primary: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    --font-secondary: Arial, Helvetica, sans-serif;
    --font-mono: 'Courier New', monospace;

    /* 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 */

    /* Font Weights */
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;

    /* Line Heights */
    --leading-tight: 1.25;
    --leading-normal: 1.5;
    --leading-relaxed: 1.75;
    --leading-loose: 2;


    /* ===== SPACING ===== */
    --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 */


    /* ===== BORDERS ===== */
    --border-width: 1px;
    --border-width-thick: 2px;
    --border-radius-sm: 4px;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 15px;
    --border-radius-full: 9999px;


    /* ===== SHADOWS ===== */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 12px 32px rgba(0, 0, 0, 0.15);


    /* ===== TRANSITIONS ===== */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;


    /* ===== Z-INDEX ===== */
    --z-base: 1;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-popover: 600;
    --z-tooltip: 700;


    /* ===== LAYOUT ===== */
    --container-max-width: 1200px;
    --header-height: 70px;
    --sidebar-width: 280px;
}