/* ===================================
   VARIABLES CSS - SISTEMA DE DISEÑO
   =================================== */

:root {
  /* === COLORES PRINCIPALES === */
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #dbeafe;
  --primary-dark: #1e40af;
  
  --secondary-color: #64748b;
  --secondary-hover: #475569;
  --secondary-light: #f1f5f9;
  --secondary-dark: #334155;
  
  --accent-color: #10b981;
  --accent-hover: #059669;
  --accent-light: #d1fae5;
  
  --warning-color: #f59e0b;
  --warning-hover: #d97706;
  --warning-light: #fef3c7;
  
  --danger-color: #ef4444;
  --danger-hover: #dc2626;
  --danger-light: #fee2e2;
  
  --success-color: #22c55e;
  --success-hover: #16a34a;
  --success-light: #dcfce7;
  
  /* === COLORES DE FONDO === */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-dark: #0f172a;
  --bg-dark-secondary: #1e293b;
  --bg-dark-tertiary: #334155;
  
  /* === COLORES DE TEXTO === */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #64748b;
  --text-light: #ffffff;
  --text-muted: #94a3b8;
  
  /* === TIPOGRAFÍA === */
  --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-secondary: 'JetBrains Mono', 'Fira Code', monospace;
  
  --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-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  
  /* === ESPACIADO === */
  --spacing-xs: 0.25rem;   /* 4px */
  --spacing-sm: 0.5rem;    /* 8px */
  --spacing-md: 0.75rem;   /* 12px */
  --spacing-lg: 1rem;      /* 16px */
  --spacing-xl: 1.5rem;    /* 24px */
  --spacing-2xl: 2rem;     /* 32px */
  --spacing-3xl: 3rem;     /* 48px */
  --spacing-4xl: 4rem;     /* 64px */
  --spacing-5xl: 6rem;     /* 96px */
  
  /* === BORDES === */
  --border-radius-sm: 0.25rem;  /* 4px */
  --border-radius-md: 0.375rem; /* 6px */
  --border-radius-lg: 0.5rem;   /* 8px */
  --border-radius-xl: 0.75rem;  /* 12px */
  --border-radius-2xl: 1rem;    /* 16px */
  --border-radius-full: 9999px;
  
  --border-width: 1px;
  --border-width-2: 2px;
  --border-width-4: 4px;
  
  --border-color: #e2e8f0;
  --border-color-dark: #475569;
  
  /* === SOMBRAS === */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  
  /* === TRANSICIONES === */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
  
  /* === Z-INDEX === */
  --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 === */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
  
  /* === COLORES ESPECÍFICOS WALLEE === */
  --wallee-primary: #2563eb;
  --wallee-secondary: #10b981;
  --wallee-accent: #f59e0b;
  --wallee-mda: #8b5cf6;
  --wallee-crypto: #f97316;
  --wallee-usd: #22c55e;
  
  /* === GRADIENTES === */
  --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
  --gradient-secondary: linear-gradient(135deg, var(--secondary-color) 0%, var(--secondary-hover) 100%);
  --gradient-success: linear-gradient(135deg, var(--success-color) 0%, var(--success-hover) 100%);
  --gradient-wallee: linear-gradient(135deg, var(--wallee-primary) 0%, var(--wallee-secondary) 100%);
}

/* === TEMA OSCURO === */
[data-theme="dark"] {
  --bg-primary: var(--bg-dark);
  --bg-secondary: var(--bg-dark-secondary);
  --bg-tertiary: var(--bg-dark-tertiary);
  
  --text-primary: var(--text-light);
  --text-secondary: #cbd5e1;
  --text-tertiary: #94a3b8;
  --text-muted: #64748b;
  
  --border-color: var(--border-color-dark);
  
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.4);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.4);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.4), 0 8px 10px -6px rgb(0 0 0 / 0.4);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.6);
}

/* === UTILIDADES === */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.transition-all {
  transition: all var(--transition-normal);
}

.transition-colors {
  transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
}

.transition-transform {
  transition: transform var(--transition-normal);
}