/* ==========================================================================
   VARIABLES — Design Tokens y Sistema de Diseño de Finanzas Personales
   Centralización de la identidad visual azul, paleta semántica, tipografía,
   espaciados, radios de curvatura, sombras y soporte de modo oscuro.
   ========================================================================== */

:root {
    color-scheme: light dark;

    /* --- Identidad Visual Centralizada (Azul Financiero) --- */
    --color-primary: #1d4ed8;
    --color-primary-dark: #1e3a8a;
    --color-primary-light: #3b82f6;
    --color-primary-subtle: #eff6ff;
    --color-primary-glow: rgba(29, 78, 216, 0.15);

    /* --- Superficies y Fondos Neutros --- */
    --color-background: #f8fafc;
    --color-surface: #ffffff;
    --color-surface-alt: #f1f5f9;
    --color-surface-hover: #e2e8f0;
    --color-surface-glass: rgba(255, 255, 255, 0.85);

    /* --- Sidebar & Contraste --- */
    --color-sidebar-bg: #0f172a;
    --color-sidebar-surface: #1e293b;
    --color-sidebar-hover: #334155;
    --color-sidebar-text: #f8fafc;
    --color-sidebar-muted: #94a3b8;
    --color-sidebar-border: #1e293b;

    /* --- Textos y Tipografía --- */
    --color-text: #0f172a;
    --color-text-subtle: #334155;
    --color-muted: #64748b;
    --color-text-inverse: #ffffff;

    /* --- Bordes y Separadores --- */
    --color-border: #e2e8f0;
    --color-border-strong: #cbd5e1;

    /* --- Estados Semánticos Financieros --- */
    --color-success: #10b981;
    --color-success-dark: #047857;
    --color-success-subtle: #ecfdf5;

    --color-danger: #ef4444;
    --color-danger-dark: #b91c1c;
    --color-danger-subtle: #fef2f2;

    --color-warning: #f59e0b;
    --color-warning-dark: #b45309;
    --color-warning-subtle: #fffbeb;

    --color-info: #0284c7;
    --color-info-subtle: #f0f9ff;

    /* Alias semánticos requeridos para el negocio */
    --color-ingreso: var(--color-success);
    --color-ingreso-subtle: var(--color-success-subtle);
    --color-gasto: var(--color-danger);
    --color-gasto-subtle: var(--color-danger-subtle);

    /* Enfoque y Accesibilidad */
    --color-focus: #2563eb;
    --color-focus-ring: rgba(37, 99, 235, 0.35);

    /* --- Tipografía --- */
    --fuente-base: "Plus Jakarta Sans", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --fuente-mono: "JetBrains Mono", "Fira Code", SFMono-Regular, Consolas, monospace;

    --texto-xs: 0.75rem;    /* 12px */
    --texto-sm: 0.875rem;   /* 14px */
    --texto-md: 1rem;       /* 16px */
    --texto-lg: 1.125rem;   /* 18px */
    --texto-xl: 1.25rem;    /* 20px */
    --texto-2xl: 1.5rem;    /* 24px */
    --texto-3xl: 1.875rem;  /* 30px */
    --texto-4xl: 2.25rem;   /* 36px */

    --interlineado-apretado: 1.2;
    --interlineado: 1.5;
    --interlineado-amplio: 1.65;

    /* --- Espaciado Sistemático (Múltiplos de 4px) --- */
    --espacio-1: 0.25rem;   /* 4px */
    --espacio-2: 0.5rem;    /* 8px */
    --espacio-3: 0.75rem;   /* 12px */
    --espacio-4: 1rem;      /* 16px */
    --espacio-5: 1.25rem;   /* 20px */
    --espacio-6: 1.5rem;    /* 24px */
    --espacio-7: 2rem;      /* 32px */
    --espacio-8: 2.5rem;    /* 40px */
    --espacio-9: 3rem;      /* 48px */

    /* --- Radios de Curvatura --- */
    --radio-xs: 0.25rem;
    --radio-sm: 0.375rem;
    --radio-md: 0.5rem;
    --radio-lg: 0.75rem;
    --radio-xl: 1rem;
    --radio-2xl: 1.25rem;
    --radio-completo: 9999px;

    /* --- Sombras de Elevación --- */
    --sombra-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
    --sombra-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.08), 0 1px 2px -1px rgba(15, 23, 42, 0.08);
    --sombra-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.06);
    --sombra-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
    --sombra-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.09), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
    --sombra-azul: 0 10px 25px -5px rgba(29, 78, 216, 0.25);

    /* --- Dimensiones de Layout --- */
    --ancho-sidebar: 16.5rem;
    --altura-header: 4.25rem;
    --ancho-max-contenido: 84rem;
    --altura-tactil: 2.75rem;

    /* --- Transiciones --- */
    --transicion-rapida: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transicion-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transicion-suave: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Paleta de Tema Oscuro --- */
@media (prefers-color-scheme: dark) {
    :root {
        --color-primary: #3b82f6;
        --color-primary-dark: #60a5fa;
        --color-primary-light: #93c5fd;
        --color-primary-subtle: rgba(59, 130, 246, 0.12);
        --color-primary-glow: rgba(59, 130, 246, 0.25);

        --color-background: #090d16;
        --color-surface: #111827;
        --color-surface-alt: #1a2234;
        --color-surface-hover: #242e44;
        --color-surface-glass: rgba(17, 24, 39, 0.85);

        --color-sidebar-bg: #080c14;
        --color-sidebar-surface: #111827;
        --color-sidebar-hover: #1e293b;
        --color-sidebar-text: #f8fafc;
        --color-sidebar-muted: #818cf8;
        --color-sidebar-border: #1a2234;

        --color-text: #f8fafc;
        --color-text-subtle: #cbd5e1;
        --color-muted: #94a3b8;
        --color-text-inverse: #090d16;

        --color-border: #1e293b;
        --color-border-strong: #334155;

        --color-success: #34d399;
        --color-success-dark: #6ee7b7;
        --color-success-subtle: rgba(52, 211, 153, 0.12);

        --color-danger: #f87171;
        --color-danger-dark: #fca5a5;
        --color-danger-subtle: rgba(248, 113, 113, 0.12);

        --color-warning: #fbbf24;
        --color-warning-dark: #fde68a;
        --color-warning-subtle: rgba(251, 191, 36, 0.12);

        --color-info: #38bdf8;
        --color-info-subtle: rgba(56, 189, 248, 0.12);

        --color-focus: #60a5fa;
        --color-focus-ring: rgba(96, 165, 250, 0.4);

        --sombra-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
        --sombra-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4);
        --sombra-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
        --sombra-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.45);
        --sombra-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
    }
}