/* ================================================================
   01-BASE-SISTEMA.css - VARIABLES Y RESET GRIZALUM
   Variables CSS, colores, fuentes, espaciados y reset
   ================================================================ */

/* RESET AVANZADO */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* ===== COLORES PREMIUM GRIZALUM ===== */
    --peru-gold: #d4af37;
    --peru-gold-dark: #b87333;
    --peru-gold-light: #f5d76e;
    
    /* ===== GRADIENTES PROFESIONALES ===== */
    --gradient-gold: linear-gradient(135deg, var(--peru-gold) 0%, var(--peru-gold-dark) 100%);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-warning: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    --gradient-danger: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    --gradient-purple: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
    
    /* ===== EFECTOS GLASS PREMIUM ===== */
    --glass-effect: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --backdrop-blur: blur(20px);
    
    /* ===== ESCALA DE GRISES PROFESIONAL ===== */
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* ===== SOMBRAS PREMIUM ===== */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --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-gold: 0 10px 40px rgba(212, 175, 55, 0.3);
    
    /* ===== DIMENSIONES CONTROLADAS ===== */
    --sidebar-width: 280px;
    --header-height: 60px;
    
    /* ===== ESPACIADOS PRECISOS ===== */
    --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 */
   
    /* ===== ESPACIADOS ESPECÍFICOS DASHBOARD ===== */
    --dashboard-padding: 14px;
    --dashboard-gap: 10px;
    --cards-gap: 12px;
    --cards-bottom-margin: 18px;
    --header-to-content: 2px;

    /* ===== ESPACIADOS MÓVIL ===== */
    --dashboard-padding-mobile: 8px;
    --cards-gap-mobile: 8px;
   
    /* ===== TIPOGRAFÍA CONTROLADA ===== */
    --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 */
    
    /* ===== TRANSICIONES SUAVES ===== */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== RESET Y BASE PROFESIONAL ===== */
html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
    font-variant-numeric: tabular-nums;
}

/* ===== PANTALLA DE CARGA ===== */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: linear-gradient(135deg, var(--gray-900) 0%, var(--gray-800) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-screen.hide {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    text-align: center;
    color: white;
}

.loading-logo {
    font-size: 3rem;
    color: var(--peru-gold);
    margin-bottom: var(--spacing-lg);
}

.loading-content h1 {
    font-size: var(--text-3xl);
    font-weight: 900;
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: var(--spacing-sm);
}

.loading-content p {
    font-size: var(--text-base);
    color: var(--gray-400);
    margin-bottom: var(--spacing-xl);
}

.loading-bar {
    width: 200px;
    height: 4px;
    background: var(--gray-700);
    border-radius: 2px;
    overflow: hidden;
    margin: 0 auto;
}

.loading-progress {
    height: 100%;
    background: var(--gradient-gold);
    width: 0%;
    animation: loadingProgress 3s ease-in-out forwards;
}

@keyframes loadingProgress {
    to { width: 100%; }
}

/* ===== SCROLLBAR PERSONALIZADO GLOBAL ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--peru-gold), var(--peru-gold-dark));
    border-radius: 4px;
    transition: all var(--transition-normal);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--peru-gold-dark);
    transform: scaleY(1.1);
}

/* ===== SOPORTE PARA DARK MODE ===== */
@media (prefers-color-scheme: dark) {
    :root {
        --gray-50: #0f172a;
        --gray-100: #1e293b;
        --gray-200: #334155;
        --gray-300: #475569;
        --gray-400: #64748b;
        --gray-500: #94a3b8;
        --gray-600: #cbd5e1;
        --gray-700: #e2e8f0;
        --gray-800: #f1f5f9;
        --gray-900: #f8fafc;
        --white: #0f172a;
    }
    
    body {
        background: linear-gradient(135deg, var(--gray-900) 0%, var(--gray-800) 100%);
        color: var(--gray-100);
    }
}

/* ===== ACCESIBILIDAD ===== */
.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;
}

/* ===== FOCUS STYLES MEJORADOS ===== */
button:focus,
a:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--peru-gold);
    outline-offset: 2px;
}

/* ===== OPTIMIZACIONES DE RENDIMIENTO ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===== PRINT STYLES BASE ===== */
@media print {
    body {
        background: white !important;
        color: black !important;
    }
    
    * {
        box-shadow: none !important;
        background: transparent !important;
    }
}