/*
  ============================================
  BGF WELDING - CSS VARIABLES
  Sistema de diseño con variables reutilizables
  ============================================
*/

:root {
  /* ========== COLORES PRINCIPALES ========== */
  /* Primarios - Azul Industrial */
  --color-primary-dark: #1a2332;
  --color-primary: #2c3e50;
  --color-primary-light: #34495e;
  
  /* Acentos - Naranja Soldadura */
  --color-accent: #ff6b35;
  --color-accent-dark: #e85a2a;
  --color-accent-light: #ff8555;
  --color-accent-glow: #f7931e;
  
  /* Neutros */
  --color-white: #ffffff;
  --color-light: #f8f9fa;
  --color-light-gray: #e9ecef;
  --color-gray: #6c757d;
  --color-dark-gray: #495057;
  --color-dark: #212529;
  --color-black: #000000;
  
  /* Colores de estado */
  --color-success: #28a745;
  --color-warning: #ffc107;
  --color-danger: #dc3545;
  --color-info: #17a2b8;
  
  /* ========== TIPOGRAFÍA ========== */
  /* Familias de fuentes */
  --font-primary: 'Montserrat', 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-secondary: 'Inter', 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-monospace: 'Courier New', monospace;
  
  /* Tamaños base */
  --font-size-base: 16px;
  --font-size-small: 0.875rem;    /* 14px */
  --font-size-tiny: 0.75rem;      /* 12px */
  
  /* Escala tipográfica responsive */
  --font-size-h1: clamp(2.5rem, 5vw, 4rem);      /* 40px - 64px */
  --font-size-h2: clamp(2rem, 4vw, 3rem);        /* 32px - 48px */
  --font-size-h3: clamp(1.5rem, 3vw, 2.25rem);   /* 24px - 36px */
  --font-size-h4: clamp(1.25rem, 2.5vw, 1.75rem);/* 20px - 28px */
  --font-size-h5: clamp(1.125rem, 2vw, 1.5rem);  /* 18px - 24px */
  --font-size-h6: clamp(1rem, 1.5vw, 1.25rem);   /* 16px - 20px */
  --font-size-body: clamp(1rem, 1.2vw, 1.125rem);/* 16px - 18px */
  
  /* Pesos de fuente */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-black: 900;
  
  /* Altura de línea */
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  --line-height-loose: 2;
  
  /* ========== ESPACIADOS ========== */
  --spacing-xs: 0.25rem;    /* 4px */
  --spacing-sm: 0.5rem;     /* 8px */
  --spacing-md: 1rem;       /* 16px */
  --spacing-lg: 1.5rem;     /* 24px */
  --spacing-xl: 2rem;       /* 32px */
  --spacing-2xl: 3rem;      /* 48px */
  --spacing-3xl: 4rem;      /* 64px */
  --spacing-4xl: 6rem;      /* 96px */
  --spacing-5xl: 8rem;      /* 128px */
  
  /* ========== LAYOUT ========== */
  /* Contenedores */
  --container-max-width: 1200px;
  --container-padding: var(--spacing-lg);
  --container-padding-mobile: var(--spacing-md);
  
  /* Grid */
  --grid-gap: var(--spacing-xl);
  --grid-gap-mobile: var(--spacing-lg);
  
  /* ========== BORDES ========== */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --border-radius-xl: 16px;
  --border-radius-full: 9999px;
  
  --border-width: 1px;
  --border-width-thick: 2px;
  --border-width-thicker: 4px;
  
  /* ========== SOMBRAS ========== */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --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, 0.25);
  --shadow-glow: 0 0 20px rgba(255, 107, 53, 0.3);
  
  /* ========== TRANSICIONES ========== */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
  
  /* Curvas de animación */
  --ease-in-quad: cubic-bezier(0.55, 0.085, 0.68, 0.53);
  --ease-out-quad: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-in-out-quad: cubic-bezier(0.455, 0.03, 0.515, 0.955);
  --ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);
  
  /* ========== 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;
  
  /* ========== BREAKPOINTS (para JS) ========== */
  --breakpoint-sm: 576px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 992px;
  --breakpoint-xl: 1200px;
  --breakpoint-xxl: 1400px;
}

/* ========== MODO OSCURO (Opcional) ========== */
@media (prefers-color-scheme: dark) {
  :root[data-theme="auto"] {
    --color-primary-dark: #0d1117;
    --color-primary: #161b22;
    --color-light: #21262d;
    --color-light-gray: #30363d;
  }
}

/* ========== VARIABLES PARA ANIMACIONES ========== */
:root {
  --animation-duration-fast: 0.2s;
  --animation-duration-base: 0.4s;
  --animation-duration-slow: 0.6s;
  --animation-duration-slower: 0.8s;
}