/**
 * CSS Variables - LogiTransportes
 * Sistema de variables CSS centralizado para mantener consistencia
 * en colores, espaciado, tipografía y efectos visuales.
 * 
 * @description Fase 1 - Optimización de CSS
 */

:root {
    /* ========================================
       COLORES PRIMARIOS
       ======================================== */
    --color-primary: #007bff;
    --color-primary-dark: #0056b3;
    --color-primary-light: #66b3ff;
    --color-primary-rgb: 0, 123, 255;
    
    /* Estados */
    --color-success: #28a745;
    --color-success-dark: #1e7e34;
    --color-success-light: #71dd8a;
    
    --color-danger: #dc3545;
    --color-danger-dark: #bd2130;
    --color-danger-light: #f1aeb5;
    
    --color-warning: #ffc107;
    --color-warning-dark: #d39e00;
    --color-warning-light: #ffe69c;
    
    --color-info: #17a2b8;
    --color-info-dark: #117a8b;
    --color-info-light: #6edff6;
    
    /* Neutros */
    --color-dark: #343a40;
    --color-secondary: #6c757d;
    --color-light: #f8f9fa;
    --color-white: #ffffff;
    --color-muted: #6c757d;
    
    /* Bordes */
    --color-border: #dee2e6;
    --color-border-light: #e9ecef;
    
    /* Colores de fondo claros (para celdas de tabla, etc.) */
    --color-success-bg: #d4edda;
    --color-danger-bg: #f8d7da;
    --color-warning-bg: #fff3cd;
    --color-info-bg: #d1ecf1;
    --color-primary-bg: #cce5ff;
    
    /* Color de tabla header (reportes) */
    --color-table-header: var(--color-primary);
    
    /* Colores de texto */
    --color-text-dark: #2c3e50;
    --color-text-muted-alt: #7f8c8d;
    
    /* ========================================
       ESPACIADO
       ======================================== */
    --spacing-xs: 0.25rem;   /* 4px */
    --spacing-sm: 0.5rem;    /* 8px */
    --spacing-md: 1rem;      /* 16px */
    --spacing-lg: 1.5rem;    /* 24px */
    --spacing-xl: 2rem;      /* 32px */
    --spacing-xxl: 3rem;     /* 48px */
    
    /* ========================================
       TIPOGRAFÍA
       ======================================== */
    --font-family-base: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-family-mono: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    
    --font-size-xs: 0.75rem;   /* 12px */
    --font-size-sm: 0.875rem;  /* 14px */
    --font-size-base: 1rem;    /* 16px */
    --font-size-lg: 1.25rem;   /* 20px */
    --font-size-xl: 1.5rem;    /* 24px */
    --font-size-xxl: 2rem;     /* 32px */
    
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    --line-height-tight: 1.25;
    --line-height-base: 1.5;
    --line-height-relaxed: 1.75;
    
    /* ========================================
       TRANSICIONES
       ======================================== */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* ========================================
       SOMBRAS
       ======================================== */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --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, 0.15);
    --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.06);
    
    /* Sombras con color */
    --shadow-primary: 0 4px 14px rgba(var(--color-primary-rgb), 0.25);
    
    /* ========================================
       BORDER RADIUS
       ======================================== */
    --radius-sm: 0.25rem;   /* 4px */
    --radius-md: 0.375rem;  /* 6px */
    --radius-lg: 0.5rem;    /* 8px */
    --radius-xl: 0.75rem;   /* 12px */
    --radius-full: 9999px;
    
    /* ========================================
       Z-INDEX
       ======================================== */
    --z-base: 1;
    --z-sticky-content: 10;  /* Para filtros sticky dentro del contenido */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 1080;
    
    /* ========================================
       BREAKPOINTS (para referencia en JS)
       ======================================== */
    --breakpoint-sm: 576px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 992px;
    --breakpoint-xl: 1200px;
    --breakpoint-xxl: 1400px;
}

/* Dark mode support (preparado para futuro) */
/* 
@media (prefers-color-scheme: dark) {
    :root {
        --color-dark: #f8f9fa;
        --color-light: #212529;
    }
}
*/