/* ============================================
   Design System Variables
   Emmanuel Travel Agency
   ============================================ */

:root {
    /* ---- Color Palette ---- */
    
    /* Primary Backgrounds */
    --color-bg-primary: #F5F7FA;
    --color-bg-secondary: #EEF2F7;
    --color-bg-dark: #1A2B4A;
    --color-bg-darker: #0F1A2E;
    
    /* Card & Surface Colors */
    --color-surface: #FFFFFF;
    --color-surface-glass: rgba(255, 255, 255, 0.85);
    --color-surface-glass-strong: rgba(255, 255, 255, 0.95);
    
    /* Primary Brand Colors */
    --color-primary: #2F5BFF;
    --color-primary-dark: #1E3FCC;
    --color-primary-light: #5B7FFF;
    --color-primary-subtle: rgba(47, 91, 255, 0.1);
    
    /* Accent Gradient */
    --gradient-sky: linear-gradient(135deg, #87CEEB 0%, #5BB3CF 50%, #4ECDC4 100%);
    --gradient-hero: linear-gradient(180deg, #D6EAF8 0%, #AED6F1 40%, #85C1E9 100%);
    --gradient-primary: linear-gradient(135deg, #2F5BFF 0%, #4ECDC4 100%);
    --gradient-cta: linear-gradient(135deg, #2F5BFF 0%, #1E3FCC 100%);
    
    /* Text Colors */
    --color-text-primary: #1F2933;
    --color-text-secondary: #6B7280;
    --color-text-muted: #9CA3AF;
    --color-text-inverse: #FFFFFF;
    --color-text-link: #2F5BFF;
    
    /* Border Colors */
    --color-border-light: rgba(0, 0, 0, 0.06);
    --color-border-medium: rgba(0, 0, 0, 0.1);
    --color-border-focus: rgba(47, 91, 255, 0.5);
    
    /* State Colors */
    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-error: #EF4444;
    
    /* ---- Typography ---- */
    
    --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', 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 */
    
    /* Font Weights */
    --font-regular: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    
    /* Line Heights */
    --leading-tight: 1.2;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    
    /* Letter Spacing */
    --tracking-tight: -0.025em;
    --tracking-normal: 0;
    --tracking-wide: 0.025em;
    
    /* ---- 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 */
    --space-24: 6rem;        /* 96px */
    
    /* ---- Border Radius ---- */
    
    --radius-sm: 0.375rem;   /* 6px */
    --radius-md: 0.5rem;     /* 8px */
    --radius-lg: 0.75rem;    /* 12px */
    --radius-xl: 1rem;       /* 16px */
    --radius-2xl: 1.5rem;    /* 24px */
    --radius-3xl: 2rem;      /* 32px */
    --radius-full: 9999px;
    
    /* ---- Shadows ---- */
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.08);
    --shadow-glow: 0 0 40px rgba(47, 91, 255, 0.15);
    
    /* ---- Transitions ---- */
    
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* ---- Z-Index ---- */
    
    --z-base: 0;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal: 400;
    --z-tooltip: 500;
    
    /* ---- Container ---- */
    
    --container-max: 1200px;
    --container-padding: var(--space-6);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    :root {
        --text-5xl: 2.25rem;
        --text-6xl: 2.75rem;
        --container-padding: var(--space-4);
    }
}