/* CSS Variables - Design System */
:root {
    /* Colors - Primary Palette */
    --color-primary: #2B4B87;
    --color-primary-50: #f0f4ff;
    --color-primary-100: #e0e7ff;
    --color-primary-200: #c7d2fe;
    --color-primary-300: #a5b4fc;
    --color-primary-400: #818cf8;
    --color-primary-500: #6366f1;
    --color-primary-600: #4f46e5;
    --color-primary-700: #4338ca;
    --color-primary-800: #3730a3;
    --color-primary-900: #312e81;
    --color-primary-light: #4A6B9A;
    --color-primary-dark: #000000;
    
    /* Colors - Accent */
    --color-accent: #FF6B35;
    --color-accent-50: #fff7ed;
    --color-accent-100: #ffedd5;
    --color-accent-200: #fed7aa;
    --color-accent-300: #fdba74;
    --color-accent-400: #fb923c;
    --color-accent-500: #f97316;
    --color-accent-600: #ea580c;
    --color-accent-700: #c2410c;
    --color-accent-800: #9a3412;
    --color-accent-900: #7c2d12;
    --color-accent-light: #FF8A5B;
    --color-accent-dark: #E55A2B;
    
    /* Colors - Background */
    --color-background: #FFFFFF;
    --color-background-light: #F8F9FA;
    --color-background-dark: #F1F3F5;
    --color-background-alt: #FAFBFC;
    
    /* Colors - Text */
    --color-text-primary: #2C3E50;
    --color-text-secondary: #5A6C7D;
    --color-text-light: #8B9CAD;
    --color-text-white: #FFFFFF;
    --color-text-inverse: #FFFFFF;
    
    /* Colors - Status */
    --color-success: #27AE60;
    --color-success-light: #2ECC71;
    --color-success-dark: #229954;
    --color-warning: #F39C12;
    --color-warning-light: #F1C40F;
    --color-warning-dark: #E67E22;
    --color-error: #E74C3C;
    --color-error-light: #EC7063;
    --color-error-dark: #C0392B;
    --color-info: #3498DB;
    --color-info-light: #5DADE2;
    --color-info-dark: #2980B9;
    
    /* Colors - Neutrals */
    --color-light-gray: #F8F9FA;
    --color-medium-gray: #DEE2E6;
    --color-dark-gray: #495057;
    --color-border: #E9ECEF;
    --color-border-light: #F1F3F5;
    --color-border-dark: #CED4DA;
    --color-shadow: rgba(0, 0, 0, 0.1);
    --color-shadow-light: rgba(0, 0, 0, 0.05);
    --color-shadow-dark: rgba(0, 0, 0, 0.15);
    
    /* Typography - Font Families */
    --font-primary: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    --font-secondary: 'Merriweather', Georgia, 'Times New Roman', serif;
    --font-system: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    
    /* Typography - Font Sizes */
    --font-size-xs: 0.75rem;        /* 12px */
    --font-size-sm: 0.875rem;       /* 14px */
    --font-size-base: 1rem;         /* 16px */
    --font-size-lg: 1.125rem;       /* 18px */
    --font-size-xl: 1.25rem;        /* 20px */
    --font-size-2xl: 1.5rem;        /* 24px */
    --font-size-3xl: 1.875rem;      /* 30px */
    --font-size-4xl: 2.25rem;       /* 36px */
    --font-size-5xl: 3rem;          /* 48px */
    --font-size-6xl: 3.75rem;       /* 60px */
    --font-size-7xl: 4.5rem;        /* 72px */
    
    /* Typography - Responsive Font Sizes */
    --font-size-h1: clamp(2.25rem, 4vw, 3rem);
    --font-size-h2: clamp(1.875rem, 3vw, 2.25rem);
    --font-size-h3: clamp(1.5rem, 2.5vw, 1.875rem);
    --font-size-h4: clamp(1.25rem, 2vw, 1.5rem);
    --font-size-h5: clamp(1.125rem, 1.5vw, 1.25rem);
    --font-size-h6: clamp(1rem, 1.25vw, 1.125rem);
    
    /* Typography - Font Weights */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    --font-weight-black: 900;
    
    /* Typography - Line Heights */
    --line-height-none: 1;
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.6;
    --line-height-loose: 1.8;
    
    /* Typography - Letter Spacing */
    --letter-spacing-tighter: -0.05em;
    --letter-spacing-tight: -0.025em;
    --letter-spacing-normal: 0;
    --letter-spacing-wide: 0.025em;
    --letter-spacing-wider: 0.05em;
    --letter-spacing-widest: 0.1em;
    
    /* Spacing System */
    --spacing-0: 0;
    --spacing-1: 0.25rem;          /* 4px */
    --spacing-2: 0.5rem;           /* 8px */
    --spacing-3: 0.75rem;          /* 12px */
    --spacing-4: 1rem;             /* 16px */
    --spacing-5: 1.25rem;          /* 20px */
    --spacing-6: 1.5rem;           /* 24px */
    --spacing-7: 1.75rem;          /* 28px */
    --spacing-8: 2rem;             /* 32px */
    --spacing-9: 2.25rem;          /* 36px */
    --spacing-10: 2.5rem;          /* 40px */
    --spacing-11: 2.75rem;         /* 44px */
    --spacing-12: 3rem;            /* 48px */
    --spacing-16: 4rem;            /* 64px */
    --spacing-20: 5rem;            /* 80px */
    --spacing-24: 6rem;            /* 96px */
    --spacing-32: 8rem;            /* 128px */
    
    /* Spacing - Semantic Names */
    --spacing-xs: var(--spacing-2);
    --spacing-sm: var(--spacing-4);
    --spacing-md: var(--spacing-6);
    --spacing-lg: var(--spacing-8);
    --spacing-xl: var(--spacing-12);
    --spacing-2xl: var(--spacing-16);
    --spacing-3xl: var(--spacing-24);
    --spacing-4xl: var(--spacing-32);
    
    /* Layout */
    --container-max-width: 1200px;
    --container-padding: 1rem;
    --container-padding-sm: 1.5rem;
    --container-padding-lg: 2rem;
    --grid-gap: 1.5rem;
    --grid-gap-sm: 1rem;
    --grid-gap-lg: 2rem;
    
    /* Breakpoints */
    --breakpoint-xs: 475px;
    --breakpoint-sm: 576px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 992px;
    --breakpoint-xl: 1200px;
    --breakpoint-2xl: 1440px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-all: all 0.3s ease;
    --transition-colors: color 0.3s ease, background-color 0.3s ease, border-color 0.3s ease;
    --transition-transform: transform 0.3s ease;
    --transition-opacity: opacity 0.3s ease;
    
    /* Shadows */
    --shadow-none: none;
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.15);
    --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.1);
    
    /* Border Radius */
    --border-radius-none: 0;
    --border-radius-xs: 0.125rem;
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.375rem;
    --border-radius-lg: 0.5rem;
    --border-radius-xl: 0.75rem;
    --border-radius-2xl: 1rem;
    --border-radius-3xl: 1.5rem;
    --border-radius-full: 9999px;
    
    /* Z-Index */
    --z-index-dropdown: 1000;
    --z-index-sticky: 1020;
    --z-index-fixed: 1030;
    --z-index-modal-backdrop: 1040;
    --z-index-modal: 1050;
    --z-index-popover: 1060;
    --z-index-tooltip: 1070;
    --z-index-toast: 1080;
    
    /* Animation */
    --animation-duration-fast: 0.15s;
    --animation-duration-normal: 0.3s;
    --animation-duration-slow: 0.5s;
    --animation-timing-ease: ease;
    --animation-timing-ease-in: ease-in;
    --animation-timing-ease-out: ease-out;
    --animation-timing-ease-in-out: ease-in-out;
    
    /* Component Specific */
    --button-height: 2.75rem;
    --button-height-sm: 2.25rem;
    --button-height-lg: 3.5rem;
    --button-padding-x: 1.5rem;
    --button-padding-x-sm: 1rem;
    --button-padding-x-lg: 2rem;
    
    --input-height: 2.75rem;
    --input-padding-x: 1rem;
    --input-padding-y: 0.75rem;
    
    --card-padding: 1.5rem;
    --card-padding-sm: 1rem;
    --card-padding-lg: 2rem;
    
    --header-height: 4rem;
    --header-height-mobile: 3.5rem;
    
    --footer-padding-y: 3rem;
    --footer-padding-y-sm: 2rem;
    
    --section-padding-y: 5rem;
    --section-padding-y-sm: 3rem;
    --section-padding-y-lg: 6rem;
}