/* ============================================
   STYLES.CSS - Diseño moderno y profesional
   QuickVenta by Legacy EcoTec
   Versión: 5.1 - Corregida (Contraste en modo oscuro)
   ============================================ */

/* --------------------------------------------
   ARQUITECTURA CON CSS LAYERS
   Control total de especificidad
   Orden: reset → variables → base → components → utilities
   -------------------------------------------- */
@layer reset, variables, base, components, utilities;

/* --------------------------------------------
   LAYER 1: RESET MODERNO
   -------------------------------------------- */
@layer reset {
    *, *::before, *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }

    html {
        font-size: 16px;
        scroll-behavior: smooth;
        -webkit-text-size-adjust: 100%;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        text-rendering: optimizeLegibility;
    }

    body {
        font-family: var(--font-sans);
        font-size: var(--text-base);
        line-height: 1.6;
        color: var(--color-text-primary);
        background-color: var(--color-bg-secondary);
        overflow-x: hidden;
        transition: var(--transition-colors);
    }
}

/* --------------------------------------------
   LAYER 2: VARIABLES
   - Técnicas (paleta pura)
   - Semánticas (alias de negocio)
   - Light/Dark mode (CORREGIDO)
   -------------------------------------------- */
@layer variables {
    :root {
        /* ===== PALETA TÉCNICA (valores puros) ===== */
        --primary-50: #f0f9f1;
        --primary-100: #dcf0dd;
        --primary-200: #b9e1bb;
        --primary-300: #8fcb92;
        --primary-400: #65b569;
        --primary-500: #4CAF50;
        --primary-600: #3d8c40;
        --primary-700: #2e6930;
        --primary-800: #1f4620;
        --primary-900: #0f2310;
        
        --gray-50: #f9fafb;
        --gray-100: #f3f4f6;
        --gray-200: #e5e7eb;
        --gray-300: #d1d5db;
        --gray-400: #9ca3af;
        --gray-500: #6b7280;
        --gray-600: #4b5563;
        --gray-700: #374151;
        --gray-800: #1f2937;
        --gray-900: #111827;
        
        --accent-50: #fef2f2;
        --accent-100: #fee2e2;
        --accent-200: #fecaca;
        --accent-300: #fca5a5;
        --accent-400: #f87171;
        --accent-500: #ef4444;
        --accent-600: #dc2626;
        --accent-700: #b91c1c;
        --accent-800: #991b1b;
        --accent-900: #7f1d1d;
        
        --success: #10b981;
        --success-light: #d1fae5;
        --warning: #f59e0b;
        --warning-light: #fed7aa;
        --error: #ef4444;
        --error-light: #fee2e2;
        --info: #3b82f6;
        --info-light: #dbeafe;

        /* ===== ALIAS SEMÁNTICOS DE MARCA ===== */
        --color-brand-primary: var(--primary-500);
        --color-brand-secondary: var(--primary-600);
        --color-brand-trust: var(--primary-700);
        --color-brand-growth: var(--primary-400);
        --color-brand-urgent: var(--accent-500);
        --color-brand-calm: var(--gray-500);
        
        --color-cta-primary: var(--primary-600);
        --color-cta-primary-hover: var(--primary-700);
        --color-cta-buy: var(--primary-500);
        --color-cta-buy-hover: var(--primary-600);
        --color-cta-secondary: var(--gray-600);
        --color-cta-secondary-hover: var(--gray-700);

        /* ===== TIPOGRAFÍA ===== */
        --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        --font-serif: 'Playfair Display', Georgia, serif;
        
        --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
        --text-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
        --text-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
        --text-lg: clamp(1.125rem, 1rem + 0.625vw, 1.25rem);
        --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
        --text-2xl: clamp(1.5rem, 1.3rem + 1vw, 1.875rem);
        --text-3xl: clamp(1.875rem, 1.5rem + 1.5vw, 2.25rem);
        --text-4xl: clamp(2.25rem, 1.8rem + 2vw, 3rem);
        --text-5xl: clamp(3rem, 2.4rem + 3vw, 3.75rem);
        
        /* ===== ESPACIADO ===== */
        --space-1: 0.25rem;
        --space-2: 0.5rem;
        --space-3: 0.75rem;
        --space-4: 1rem;
        --space-5: 1.25rem;
        --space-6: 1.5rem;
        --space-8: 2rem;
        --space-10: 2.5rem;
        --space-12: 3rem;
        --space-16: 4rem;
        --space-20: 5rem;
        --space-24: 6rem;
        
        /* ===== BORDES ===== */
        --radius-sm: 0.25rem;
        --radius-md: 0.375rem;
        --radius-lg: 0.5rem;
        --radius-xl: 0.75rem;
        --radius-2xl: 1rem;
        --radius-3xl: 1.5rem;
        --radius-full: 9999px;
        
        /* ===== SOMBRAS ===== */
        --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
        --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
        --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);
        --shadow-inner: inset 0 2px 4px 0 rgb(0 0 0 / 0.05);
        
        /* ===== TRANSICIONES ===== */
        --transition-all: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --transition-transform: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --transition-colors: background-color 0.3s cubic-bezier(0.4, 0, 0.2, 1), 
                             border-color 0.3s cubic-bezier(0.4, 0, 0.2, 1), 
                             color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --transition-opacity: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --transition-shadow: box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        
        /* ===== 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-loader: 9999;
        
        /* ===== LIGHT MODE (valores semánticos) ===== */
        --color-bg-primary: #ffffff;
        --color-bg-secondary: var(--gray-50);
        --color-bg-tertiary: var(--gray-100);
        --color-bg-card: #ffffff;
        
        --color-text-primary: var(--gray-900);
        --color-text-secondary: var(--gray-600);
        --color-text-tertiary: var(--gray-400);
        --color-text-inverse: #ffffff;
        
        --color-border-light: var(--gray-200);
        --color-border-medium: var(--gray-300);
        --color-border-dark: var(--gray-400);
        
        --color-header-bg: rgba(255, 255, 255, 0.95);
        --color-header-border: var(--gray-200);
        
        --color-input-bg: #ffffff;
        --color-input-border: var(--gray-300);
        --color-input-focus: var(--primary-500);
        
        --shadow-card: var(--shadow-sm);
        --shadow-card-hover: var(--shadow-lg);
        --shadow-header: var(--shadow-sm);
    }

    /* ===== DARK MODE CORREGIDO ===== */
    @media (prefers-color-scheme: dark) {
        :root {
            --color-bg-primary: #1f2937;
            --color-bg-secondary: #111827;
            --color-bg-tertiary: #374151;
            --color-bg-card: #1f2937;
            
            --color-text-primary: #f9fafb;
            --color-text-secondary: #d1d5db;
            --color-text-tertiary: #9ca3af;
            --color-text-inverse: #111827;
            
            --color-border-light: #374151;
            --color-border-medium: #4b5563;
            --color-border-dark: #6b7280;
            
            --color-header-bg: rgba(31, 41, 55, 0.95);
            --color-header-border: #374151;
            
            --color-input-bg: #374151;
            --color-input-border: #4b5563;
            --color-input-focus: var(--primary-400);
            
            --shadow-card: 0 4px 6px rgba(0, 0, 0, 0.4);
            --shadow-card-hover: 0 10px 15px rgba(0, 0, 0, 0.5);
            --shadow-header: 0 4px 6px rgba(0, 0, 0, 0.3);
            
            /* Colores de fondo para badges y alertas en modo oscuro */
            --primary-50: #1a3a2a;
            --primary-100: #1e4a2e;
            
            --success-light: #064e3b;
            --warning-light: #78350f;
            --error-light: #7f1d1d;
            --info-light: #1e3a8a;
        }
    }

    /* ===== DARK MODE MANUAL ===== */
    [data-theme="dark"] {
        --color-bg-primary: #1f2937;
        --color-bg-secondary: #111827;
        --color-bg-tertiary: #374151;
        --color-bg-card: #1f2937;
        
        --color-text-primary: #f9fafb;
        --color-text-secondary: #d1d5db;
        --color-text-tertiary: #9ca3af;
        --color-text-inverse: #111827;
        
        --color-border-light: #374151;
        --color-border-medium: #4b5563;
        --color-border-dark: #6b7280;
        
        --color-header-bg: rgba(31, 41, 55, 0.95);
        --color-header-border: #374151;
        
        --color-input-bg: #374151;
        --color-input-border: #4b5563;
        --color-input-focus: var(--primary-400);
        
        --shadow-card: 0 4px 6px rgba(0, 0, 0, 0.4);
        --shadow-card-hover: 0 10px 15px rgba(0, 0, 0, 0.5);
        --shadow-header: 0 4px 6px rgba(0, 0, 0, 0.3);
        
        --primary-50: #1a3a2a;
        --primary-100: #1e4a2e;
        
        --success-light: #064e3b;
        --warning-light: #78350f;
        --error-light: #7f1d1d;
        --info-light: #1e3a8a;
    }
}

/* --------------------------------------------
   LAYER 3: BASE (Elementos HTML)
   -------------------------------------------- */
@layer base {
    :focus-visible {
        outline: 2px solid var(--color-brand-primary);
        outline-offset: 2px;
        border-radius: var(--radius-sm);
    }

    @media (forced-colors: active) {
        :focus-visible {
            outline: 2px solid transparent;
        }
    }

    h1, h2, h3, h4, h5, h6 {
        font-family: var(--font-sans);
        font-weight: 700;
        line-height: 1.2;
        color: var(--color-text-primary);
        letter-spacing: -0.025em;
        margin-bottom: var(--space-4);
    }

    h1 { font-size: var(--text-5xl); font-weight: 800; }
    h2 { font-size: var(--text-4xl); }
    h3 { font-size: var(--text-3xl); }
    h4 { font-size: var(--text-2xl); }
    h5 { font-size: var(--text-xl); }
    h6 { font-size: var(--text-lg); }

    p {
        margin-bottom: var(--space-4);
        color: var(--color-text-secondary);
        line-height: 1.7;
    }

    a {
        color: var(--color-brand-secondary);
        text-decoration: none;
        transition: var(--transition-colors);
    }

    a:hover {
        color: var(--color-brand-trust);
    }
}

/* --------------------------------------------
   LAYER 4: COMPONENTES
   -------------------------------------------- */
@layer components {
    /* ===== CONTENEDORES ===== */
    .container {
        width: 100%;
        max-width: 1280px;
        margin: 0 auto;
        padding: 0 var(--space-4);
    }
    
    @media (min-width: 640px) {
        .container {
            padding: 0 var(--space-6);
        }
    }

    .container--sm { max-width: 768px; }
    .container--md { max-width: 1024px; }
    .container--lg { max-width: 1280px; }
    .container--fluid {
        width: 100%;
        padding: 0 var(--space-4);
    }

    /* ===== HEADER PROFESIONAL ===== */
    .header {
        position: sticky;
        top: 0;
        left: 0;
        right: 0;
        background: var(--color-header-bg);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        border-bottom: 1px solid var(--color-header-border);
        z-index: var(--z-fixed);
        transition: var(--transition-all);
    }

    .header--scrolled {
        box-shadow: var(--shadow-header);
        background: var(--color-bg-primary);
    }

    .header__container {
        display: flex;
        justify-content: space-between;
        align-items: center;
        height: 70px;
        max-width: 1280px;
        margin: 0 auto;
        padding: 0 var(--space-4);
        flex-wrap: nowrap;
        gap: var(--space-2);
    }
    
    @media (min-width: 768px) {
        .header__container {
            height: 80px;
            padding: 0 var(--space-6);
        }
    }

    .header__logo {
        display: flex;
        align-items: center;
        gap: var(--space-2);
        text-decoration: none;
        max-width: 280px;
        min-width: 160px;
        flex-shrink: 0;
    }
    
    @media (min-width: 1024px) {
        .header__logo {
            max-width: 300px;
        }
    }

    .header__logo-image {
        width: 40px;
        height: 40px;
        border-radius: var(--radius-lg);
        overflow: hidden;
        position: relative;
        box-shadow: var(--shadow-sm);
        flex-shrink: 0;
    }
    
    @media (min-width: 768px) {
        .header__logo-image {
            width: 48px;
            height: 48px;
        }
    }

    .header__logo-image::after {
        content: '';
        position: absolute;
        inset: 0;
        border-radius: var(--radius-lg);
        box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
    }

    .header__logo-img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

    .header__logo-text {
        display: flex;
        flex-direction: column;
        overflow: hidden;
        flex: 1;
    }

    .header__logo-primary {
        font-size: clamp(1rem, 2vw, 1.25rem);
        font-weight: 700;
        color: var(--color-text-primary);
        line-height: 1.2;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .header__logo-secondary {
        font-size: clamp(0.7rem, 1.5vw, 0.8rem);
        color: var(--color-text-tertiary);
        font-weight: 500;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .header__nav {
        display: none;
    }
    
    @media (min-width: 768px) {
        .header__nav {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
            flex-wrap: wrap;
            justify-content: flex-end;
        }
    }

    .header__nav-link {
        padding: 0.4rem 0.6rem;
        font-weight: 500;
        color: var(--color-text-secondary);
        border-radius: var(--radius-full);
        transition: var(--transition-all);
        position: relative;
        font-size: 0.85rem;
        white-space: nowrap;
    }
    
    @media (min-width: 1024px) {
        .header__nav-link {
            padding: 0.5rem 0.75rem;
            font-size: 0.9rem;
        }
    }

    .header__nav-link::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 0;
        height: 2px;
        background: var(--color-brand-primary);
        transition: var(--transition-all);
        border-radius: var(--radius-full);
    }

    .header__nav-link:hover {
        color: var(--color-brand-secondary);
    }

    .header__nav-link:hover::after {
        width: 70%;
    }

    .header__nav-link--active {
        color: var(--color-brand-secondary);
        font-weight: 600;
    }

    .header__nav-link--active::after {
        width: 70%;
    }

    .header__nav-item--employee {
        margin-left: auto;
    }

    .header__nav-link--employee {
        background: #34495E;
        border: 1px solid #E74C3C;
        padding: 0.4rem 0.8rem;
        display: flex;
        align-items: center;
        gap: 0.3rem;
        white-space: nowrap;
    }

    .header__menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        background: var(--color-bg-tertiary);
        border: 1px solid var(--color-border-light);
        border-radius: var(--radius-full);
        color: var(--color-text-secondary);
        font-size: var(--text-lg);
        cursor: pointer;
        transition: var(--transition-all);
        flex-shrink: 0;
    }
    
    @media (min-width: 768px) {
        .header__menu-toggle {
            display: none;
        }
    }

    .header__menu-toggle:hover {
        background: var(--primary-100);
        color: var(--color-brand-secondary);
        border-color: var(--primary-200);
    }

    /* ===== FOOTER ===== */
    .footer {
        background: var(--color-bg-tertiary);
        border-top: 1px solid var(--color-border-light);
        padding: var(--space-12) 0 var(--space-6);
        margin-top: var(--space-16);
    }

    .footer__grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: var(--space-8);
        margin-bottom: var(--space-12);
    }
    
    @media (min-width: 640px) {
        .footer__grid {
            grid-template-columns: repeat(2, 1fr);
        }
    }
    
    @media (min-width: 1024px) {
        .footer__grid {
            grid-template-columns: 2fr 1fr 1fr 1fr;
        }
    }

    .footer__info {
        max-width: 300px;
    }

    .footer__logo {
        display: flex;
        align-items: center;
        gap: var(--space-2);
        margin-bottom: var(--space-4);
    }

    .footer__logo-img {
        width: 40px;
        height: 40px;
        border-radius: var(--radius-lg);
    }

    .footer__logo-text {
        font-size: var(--text-xl);
        font-weight: 700;
        color: var(--color-text-primary);
    }

    .footer__description {
        color: var(--color-text-secondary);
        font-size: var(--text-sm);
        margin-bottom: var(--space-4);
    }

    .footer__social {
        display: flex;
        gap: var(--space-3);
    }

    .footer__social-link {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 36px;
        height: 36px;
        border-radius: var(--radius-full);
        background: var(--color-bg-secondary);
        color: var(--color-text-secondary);
        transition: var(--transition-all);
    }
    
    .footer__social-link:hover {
        background: var(--color-brand-secondary);
        color: white;
        transform: translateY(-2px);
    }

    .footer__title {
        font-size: var(--text-lg);
        font-weight: 600;
        color: var(--color-text-primary);
        margin-bottom: var(--space-4);
    }

    .footer__list {
        list-style: none;
    }

    .footer__list-item {
        margin-bottom: var(--space-2);
    }

    .footer__link {
        color: var(--color-text-secondary);
        font-size: var(--text-sm);
        transition: var(--transition-colors);
    }
    
    .footer__link:hover {
        color: var(--color-brand-secondary);
        padding-left: var(--space-1);
    }

    .footer__contact-item {
        display: flex;
        align-items: center;
        gap: var(--space-2);
        margin-bottom: var(--space-3);
        color: var(--color-text-secondary);
        font-size: var(--text-sm);
    }

    .footer__bottom {
        padding-top: var(--space-6);
        border-top: 1px solid var(--color-border-light);
        text-align: center;
        color: var(--color-text-tertiary);
        font-size: var(--text-xs);
    }

    /* ===== BOTONES ===== */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: var(--space-2);
        padding: var(--space-2) var(--space-4);
        font-weight: 600;
        font-size: var(--text-sm);
        line-height: 1.5;
        border-radius: var(--radius-full);
        border: 1px solid transparent;
        cursor: pointer;
        transition: var(--transition-all);
        text-decoration: none;
        white-space: nowrap;
        box-shadow: var(--shadow-xs);
    }
    
    @media (min-width: 768px) {
        .btn {
            padding: var(--space-3) var(--space-6);
        }
    }
    
    .btn:focus-visible {
        outline: 2px solid var(--color-brand-primary);
        outline-offset: 2px;
    }

    .btn--sm {
        padding: var(--space-1) var(--space-3);
        font-size: var(--text-xs);
    }

    .btn--lg {
        padding: var(--space-3) var(--space-8);
        font-size: var(--text-base);
    }
    
    @media (min-width: 768px) {
        .btn--lg {
            padding: var(--space-4) var(--space-8);
        }
    }

    .btn--full {
        width: 100%;
        justify-content: center;
    }

    .btn--primary {
        background: var(--color-cta-primary);
        color: white;
        border-color: var(--color-cta-primary);
    }
    
    .btn--primary:hover {
        background: var(--color-cta-primary-hover);
        border-color: var(--color-cta-primary-hover);
        transform: translateY(-2px);
        box-shadow: var(--shadow-lg);
    }

    .btn--buy {
        background: var(--color-cta-buy);
        color: white;
        border-color: var(--color-cta-buy);
        position: relative;
        overflow: hidden;
    }
    
    .btn--buy::before {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        width: 0;
        height: 0;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.3);
        transform: translate(-50%, -50%);
        transition: width 0.6s, height 0.6s;
    }
    
    .btn--buy:hover {
        background: var(--color-cta-buy-hover);
        border-color: var(--color-cta-buy-hover);
        transform: translateY(-2px) scale(1.02);
        box-shadow: var(--shadow-xl);
    }
    
    .btn--buy:hover::before {
        width: 300px;
        height: 300px;
    }
    
    .btn--buy:active {
        transform: translateY(0) scale(0.98);
    }

    .btn--secondary {
        background: var(--color-bg-primary);
        color: var(--color-text-secondary);
        border-color: var(--color-border-medium);
    }
    
    .btn--secondary:hover {
        background: var(--color-bg-tertiary);
        border-color: var(--color-text-tertiary);
        transform: translateY(-2px);
        box-shadow: var(--shadow-md);
    }

    .btn--outline {
        background: transparent;
        color: var(--color-brand-secondary);
        border-color: var(--color-brand-secondary);
    }
    
    .btn--outline:hover {
        background: var(--primary-50);
        transform: translateY(-2px);
    }

    .btn--accent {
        background: var(--color-brand-urgent);
        color: white;
        border-color: var(--color-brand-urgent);
    }
    
    .btn--accent:hover {
        background: var(--accent-600);
        border-color: var(--accent-600);
        transform: translateY(-2px);
        box-shadow: var(--shadow-lg);
    }

    .btn:disabled,
    .btn--disabled {
        opacity: 0.5;
        cursor: not-allowed;
        pointer-events: none;
    }

    /* ===== CARDS ===== */
    .card {
        background: var(--color-bg-card);
        border-radius: var(--radius-xl);
        overflow: hidden;
        box-shadow: var(--shadow-card);
        transition: var(--transition-all);
        border: 1px solid var(--color-border-light);
        position: relative;
        height: 100%;
        display: flex;
        flex-direction: column;
    }
    
    .card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-card-hover);
        border-color: var(--primary-200);
    }
    
    .card:focus-within {
        outline: 2px solid var(--color-brand-primary);
        outline-offset: 2px;
    }

    .card__header {
        padding: var(--space-4);
        border-bottom: 1px solid var(--color-border-light);
    }
    
    @media (min-width: 768px) {
        .card__header {
            padding: var(--space-6);
        }
    }

    .card__body {
        padding: var(--space-4);
        flex: 1;
    }
    
    @media (min-width: 768px) {
        .card__body {
            padding: var(--space-6);
        }
    }

    .card__footer {
        padding: var(--space-4);
        border-top: 1px solid var(--color-border-light);
        background: var(--color-bg-tertiary);
    }
    
    @media (min-width: 768px) {
        .card__footer {
            padding: var(--space-6);
        }
    }

    /* ===== FORMULARIOS ===== */
    .form {
        max-width: 100%;
    }

    .form__group {
        margin-bottom: var(--space-4);
    }

    .form__label {
        display: block;
        margin-bottom: var(--space-2);
        font-weight: 600;
        font-size: var(--text-sm);
        color: var(--color-text-secondary);
    }
    
    .form__label i {
        color: var(--color-brand-secondary);
        margin-right: var(--space-1);
    }

    .form__label--required::after {
        content: '*';
        color: var(--error);
        margin-left: var(--space-1);
    }

    .form__control {
        width: 100%;
        padding: var(--space-3) var(--space-4);
        font-size: var(--text-base);
        border: 2px solid var(--color-input-border);
        border-radius: var(--radius-lg);
        background: var(--color-input-bg);
        transition: var(--transition-all);
        color: var(--color-text-primary);
    }
    
    .form__control:focus {
        outline: none;
        border-color: var(--color-input-focus);
        box-shadow: 0 0 0 4px var(--primary-100);
    }
    
    .form__control:disabled,
    .form__control[readonly] {
        background: var(--color-bg-tertiary);
        cursor: not-allowed;
        opacity: 0.7;
    }

    .form__control--error {
        border-color: var(--error);
    }
    
    .form__control--error:focus {
        box-shadow: 0 0 0 4px var(--error-light);
    }

    textarea.form__control {
        min-height: 100px;
        resize: vertical;
    }
    
    @media (min-width: 768px) {
        textarea.form__control {
            min-height: 120px;
        }
    }

    .form__error {
        display: block;
        margin-top: var(--space-1);
        font-size: var(--text-xs);
        color: var(--error);
    }

    .form__hint {
        display: block;
        margin-top: var(--space-1);
        font-size: var(--text-xs);
        color: var(--color-text-tertiary);
    }

    .form__checkbox,
    .form__radio {
        display: flex;
        align-items: center;
        gap: var(--space-2);
        margin-bottom: var(--space-3);
        cursor: pointer;
    }

    .form__checkbox-input,
    .form__radio-input {
        width: 18px;
        height: 18px;
        cursor: pointer;
        accent-color: var(--color-brand-primary);
    }

    .form__checkbox-label,
    .form__radio-label {
        color: var(--color-text-secondary);
        font-size: var(--text-sm);
        cursor: pointer;
        user-select: none;
    }

    /* ===== BADGES ===== */
    .badge {
        display: inline-flex;
        align-items: center;
        gap: var(--space-1);
        padding: var(--space-1) var(--space-3);
        border-radius: var(--radius-full);
        font-size: var(--text-xs);
        font-weight: 600;
        line-height: 1.5;
        white-space: nowrap;
    }

    .badge--primary {
        background: var(--primary-100);
        color: var(--primary-700);
    }

    .badge--success {
        background: var(--success-light);
        color: #065f46;
    }
    
    [data-theme="dark"] .badge--success {
        color: #86efac;
    }

    .badge--warning {
        background: var(--warning-light);
        color: #92400e;
    }
    
    [data-theme="dark"] .badge--warning {
        color: #fde68a;
    }

    .badge--error {
        background: var(--error-light);
        color: #991b1b;
    }
    
    [data-theme="dark"] .badge--error {
        color: #fecaca;
    }

    /* ===== MODAL ===== */
    .modal {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        z-index: var(--z-modal-backdrop);
        align-items: center;
        justify-content: center;
        padding: var(--space-4);
    }

    .modal--active {
        display: flex;
    }

    .modal__content {
        background: var(--color-bg-primary);
        border-radius: var(--radius-2xl);
        max-width: 600px;
        width: 100%;
        max-height: 90vh;
        overflow-y: auto;
        box-shadow: var(--shadow-2xl);
        animation: modal-slide-in 0.3s ease;
        position: relative;
    }

    .modal__header {
        padding: var(--space-4);
        border-bottom: 1px solid var(--color-border-light);
        position: sticky;
        top: 0;
        background: var(--color-bg-primary);
        z-index: 1;
    }
    
    @media (min-width: 768px) {
        .modal__header {
            padding: var(--space-6);
        }
    }

    .modal__body {
        padding: var(--space-4);
    }
    
    @media (min-width: 768px) {
        .modal__body {
            padding: var(--space-6);
        }
    }

    .modal__footer {
        padding: var(--space-4);
        border-top: 1px solid var(--color-border-light);
        background: var(--color-bg-tertiary);
        position: sticky;
        bottom: 0;
    }
    
    @media (min-width: 768px) {
        .modal__footer {
            padding: var(--space-6);
        }
    }

    .modal__close {
        position: absolute;
        top: var(--space-3);
        right: var(--space-3);
        width: 36px;
        height: 36px;
        border-radius: var(--radius-full);
        background: var(--color-bg-tertiary);
        border: 1px solid var(--color-border-light);
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--color-text-secondary);
        transition: var(--transition-all);
        z-index: 2;
    }
    
    .modal__close:hover {
        background: var(--error-light);
        color: var(--error);
        border-color: var(--error);
        transform: rotate(90deg);
    }

    /* ===== PAGINACIÓN ===== */
    .pagination {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--space-2);
        margin: var(--space-8) 0;
        list-style: none;
    }

    .pagination__item {
        display: inline-flex;
    }

    .pagination__link {
        display: flex;
        align-items: center;
        justify-content: center;
        min-width: 40px;
        height: 40px;
        padding: 0 var(--space-2);
        border-radius: var(--radius-md);
        background: var(--color-bg-card);
        color: var(--color-text-secondary);
        font-size: var(--text-sm);
        font-weight: 500;
        border: 1px solid var(--color-border-light);
        transition: var(--transition-all);
    }
    
    .pagination__link:hover {
        background: var(--color-bg-tertiary);
        border-color: var(--color-border-medium);
    }

    .pagination__link--active {
        background: var(--color-brand-secondary);
        color: white;
        border-color: var(--color-brand-secondary);
    }
    
    .pagination__link--active:hover {
        background: var(--color-brand-trust);
        color: white;
    }

    .pagination__link--disabled {
        opacity: 0.5;
        cursor: not-allowed;
        pointer-events: none;
    }

    /* ===== LOADER ===== */
    .loader {
        position: fixed;
        inset: 0;
        background: var(--color-bg-primary);
        z-index: var(--z-loader);
        display: flex;
        align-items: center;
        justify-content: center;
        transition: opacity 0.3s ease, visibility 0.3s ease;
    }

    .loader--hidden {
        opacity: 0;
        visibility: hidden;
    }

    .loader__spinner {
        width: 50px;
        height: 50px;
        border: 3px solid var(--color-border-light);
        border-top-color: var(--color-brand-primary);
        border-radius: 50%;
        animation: spin 1s linear infinite;
    }

    /* ===== ALERTAS ===== */
    .alert {
        padding: var(--space-4);
        border-radius: var(--radius-lg);
        margin-bottom: var(--space-4);
        border-left: 4px solid transparent;
    }

    .alert--success {
        background: var(--success-light);
        color: #065f46;
        border-left-color: var(--success);
    }
    
    [data-theme="dark"] .alert--success {
        color: #86efac;
    }

    .alert--error {
        background: var(--error-light);
        color: #991b1b;
        border-left-color: var(--error);
    }
    
    [data-theme="dark"] .alert--error {
        color: #fecaca;
    }

    .alert--warning {
        background: var(--warning-light);
        color: #92400e;
        border-left-color: var(--warning);
    }
    
    [data-theme="dark"] .alert--warning {
        color: #fde68a;
    }

    .alert--info {
        background: var(--info-light);
        color: #1e40af;
        border-left-color: var(--info);
    }
    
    [data-theme="dark"] .alert--info {
        color: #bfdbfe;
    }
}

/* --------------------------------------------
   LAYER 5: UTILIDADES
   -------------------------------------------- */
@layer utilities {
    /* Grid utilities */
    .grid {
        display: grid;
        gap: var(--space-4);
    }
    
    @media (min-width: 640px) {
        .grid {
            gap: var(--space-6);
        }
    }

    .grid--cols-1 { grid-template-columns: 1fr; }
    .grid--cols-2 { grid-template-columns: repeat(2, 1fr); }
    .grid--cols-3 { grid-template-columns: repeat(3, 1fr); }
    .grid--cols-4 { grid-template-columns: repeat(4, 1fr); }

    @media (max-width: 1024px) {
        .grid--cols-4 { grid-template-columns: repeat(3, 1fr); }
    }

    @media (max-width: 768px) {
        .grid--cols-3,
        .grid--cols-4 { 
            grid-template-columns: repeat(2, 1fr); 
        }
    }

    @media (max-width: 640px) {
        .grid--cols-2,
        .grid--cols-3,
        .grid--cols-4 { 
            grid-template-columns: 1fr; 
        }
    }

    /* Flex utilities */
    .flex { display: flex; }
    .flex--col { flex-direction: column; }
    .flex--row { flex-direction: row; }
    .flex--wrap { flex-wrap: wrap; }
    .flex--nowrap { flex-wrap: nowrap; }

    .items--center { align-items: center; }
    .items--start { align-items: flex-start; }
    .items--end { align-items: flex-end; }
    .items--stretch { align-items: stretch; }

    .justify--center { justify-content: center; }
    .justify--between { justify-content: space-between; }
    .justify--around { justify-content: space-around; }
    .justify--evenly { justify-content: space-evenly; }
    .justify--end { justify-content: flex-end; }
    .justify--start { justify-content: flex-start; }

    /* Gap */
    .gap-1 { gap: var(--space-1); }
    .gap-2 { gap: var(--space-2); }
    .gap-3 { gap: var(--space-3); }
    .gap-4 { gap: var(--space-4); }
    .gap-5 { gap: var(--space-5); }
    .gap-6 { gap: var(--space-6); }
    .gap-8 { gap: var(--space-8); }

    /* Text */
    .text--primary { color: var(--color-brand-primary); }
    .text--success { color: var(--success); }
    .text--warning { color: var(--warning); }
    .text--error { color: var(--error); }
    .text--white { color: #ffffff; }
    .text--gray { color: var(--color-text-tertiary); }
    .text--center { text-align: center; }
    .text--left { text-align: left; }
    .text--right { text-align: right; }
    .text--justify { text-align: justify; }
    .text--uppercase { text-transform: uppercase; }
    .text--bold { font-weight: 700; }
    .text--semibold { font-weight: 600; }
    .text--medium { font-weight: 500; }
    .text--normal { font-weight: 400; }
    .text--light { font-weight: 300; }

    /* Backgrounds */
    .bg--primary { background: var(--color-brand-primary); }
    .bg--primary-light { background: var(--primary-50); }
    .bg--success { background: var(--success-light); }
    .bg--warning { background: var(--warning-light); }
    .bg--error { background: var(--error-light); }
    .bg--white { background: var(--color-bg-primary); }
    .bg--gray { background: var(--color-bg-tertiary); }
    .bg--transparent { background: transparent; }

    /* Margins */
    .m-0 { margin: 0; }
    .mt-1 { margin-top: var(--space-1); }
    .mt-2 { margin-top: var(--space-2); }
    .mt-3 { margin-top: var(--space-3); }
    .mt-4 { margin-top: var(--space-4); }
    .mt-5 { margin-top: var(--space-5); }
    .mt-6 { margin-top: var(--space-6); }
    .mt-8 { margin-top: var(--space-8); }
    .mt-10 { margin-top: var(--space-10); }
    .mt-12 { margin-top: var(--space-12); }
    .mt-16 { margin-top: var(--space-16); }

    .mb-1 { margin-bottom: var(--space-1); }
    .mb-2 { margin-bottom: var(--space-2); }
    .mb-3 { margin-bottom: var(--space-3); }
    .mb-4 { margin-bottom: var(--space-4); }
    .mb-5 { margin-bottom: var(--space-5); }
    .mb-6 { margin-bottom: var(--space-6); }
    .mb-8 { margin-bottom: var(--space-8); }
    .mb-10 { margin-bottom: var(--space-10); }
    .mb-12 { margin-bottom: var(--space-12); }
    .mb-16 { margin-bottom: var(--space-16); }

    .ml-1 { margin-left: var(--space-1); }
    .ml-2 { margin-left: var(--space-2); }
    .ml-3 { margin-left: var(--space-3); }
    .ml-4 { margin-left: var(--space-4); }
    .ml-auto { margin-left: auto; }

    .mr-1 { margin-right: var(--space-1); }
    .mr-2 { margin-right: var(--space-2); }
    .mr-3 { margin-right: var(--space-3); }
    .mr-4 { margin-right: var(--space-4); }
    .mr-auto { margin-right: auto; }

    .mx-auto { margin-left: auto; margin-right: auto; }

    /* Paddings */
    .p-0 { padding: 0; }
    .p-1 { padding: var(--space-1); }
    .p-2 { padding: var(--space-2); }
    .p-3 { padding: var(--space-3); }
    .p-4 { padding: var(--space-4); }
    .p-5 { padding: var(--space-5); }
    .p-6 { padding: var(--space-6); }
    .p-8 { padding: var(--space-8); }

    .pt-1 { padding-top: var(--space-1); }
    .pt-2 { padding-top: var(--space-2); }
    .pt-3 { padding-top: var(--space-3); }
    .pt-4 { padding-top: var(--space-4); }
    .pt-5 { padding-top: var(--space-5); }
    .pt-6 { padding-top: var(--space-6); }
    .pt-8 { padding-top: var(--space-8); }

    .pb-1 { padding-bottom: var(--space-1); }
    .pb-2 { padding-bottom: var(--space-2); }
    .pb-3 { padding-bottom: var(--space-3); }
    .pb-4 { padding-bottom: var(--space-4); }
    .pb-5 { padding-bottom: var(--space-5); }
    .pb-6 { padding-bottom: var(--space-6); }
    .pb-8 { padding-bottom: var(--space-8); }

    /* Borders */
    .rounded--sm { border-radius: var(--radius-sm); }
    .rounded--md { border-radius: var(--radius-md); }
    .rounded--lg { border-radius: var(--radius-lg); }
    .rounded--xl { border-radius: var(--radius-xl); }
    .rounded--2xl { border-radius: var(--radius-2xl); }
    .rounded--3xl { border-radius: var(--radius-3xl); }
    .rounded--full { border-radius: var(--radius-full); }
    .rounded--none { border-radius: 0; }

    /* Shadows */
    .shadow--sm { box-shadow: var(--shadow-sm); }
    .shadow--md { box-shadow: var(--shadow-md); }
    .shadow--lg { box-shadow: var(--shadow-lg); }
    .shadow--xl { box-shadow: var(--shadow-xl); }
    .shadow--2xl { box-shadow: var(--shadow-2xl); }
    .shadow--none { box-shadow: none; }

    /* Display */
    .d-none { display: none; }
    .d-block { display: block; }
    .d-inline-block { display: inline-block; }
    .d-inline { display: inline; }
    .d-flex { display: flex; }
    .d-inline-flex { display: inline-flex; }
    .d-grid { display: grid; }

    /* Position */
    .position-relative { position: relative; }
    .position-absolute { position: absolute; }
    .position-fixed { position: fixed; }
    .position-sticky { position: sticky; }

    /* Width */
    .w-full { width: 100%; }
    .w-auto { width: auto; }
    .w-1-2 { width: 50%; }
    .w-1-3 { width: 33.333%; }
    .w-2-3 { width: 66.666%; }
    .w-1-4 { width: 25%; }
    .w-3-4 { width: 75%; }

    /* Height */
    .h-full { height: 100%; }
    .h-auto { height: auto; }
    .h-screen { height: 100vh; }

    /* Overflow */
    .overflow-hidden { overflow: hidden; }
    .overflow-auto { overflow: auto; }
    .overflow-scroll { overflow: scroll; }
    .overflow-visible { overflow: visible; }
}

/* --------------------------------------------
   ANIMACIONES GLOBALES
   -------------------------------------------- */
@keyframes modal-slide-in {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slide-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slide-left {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slide-right {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scale-in {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Clases de animación */
.animate-fade-in { animation: fade-in 0.6s ease; }
.animate-slide-up { animation: slide-up 0.6s ease; }
.animate-slide-left { animation: slide-left 0.6s ease; }
.animate-slide-right { animation: slide-right 0.6s ease; }
.animate-scale { animation: scale-in 0.6s ease; }
.animate-float { animation: float 3s ease-in-out infinite; }
.animate-pulse { animation: pulse 2s ease-in-out infinite; }

/* --------------------------------------------
   SCROLLBAR PERSONALIZADA
   -------------------------------------------- */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb {
    background: var(--color-text-tertiary);
    border-radius: var(--radius-full);
    border: 3px solid var(--color-bg-tertiary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-brand-primary);
}

/* Para Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--color-text-tertiary) var(--color-bg-tertiary);
}

/* --------------------------------------------
   SELECTOR DE TEXTO
   -------------------------------------------- */
::selection {
    background: var(--color-brand-primary);
    color: white;
}

::-moz-selection {
    background: var(--color-brand-primary);
    color: white;
}

/* --------------------------------------------
   PREFERENCIAS DE MOVIMIENTO
   -------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* --------------------------------------------
   ESTILOS DE IMPRESIÓN
   -------------------------------------------- */
@media print {
    .header,
    .footer,
    .btn,
    .modal,
    .header__menu-toggle,
    .loader,
    .pagination {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
        font-size: 12pt;
    }
    
    a {
        color: black;
        text-decoration: underline;
    }
    
    .card,
    .card--pricing {
        box-shadow: none;
        border: 1px solid #ddd;
        break-inside: avoid;
    }
    
    .container {
        max-width: 100%;
        padding: 0;
    }
}

/* --------------------------------------------
   MEDIA QUERIES ESPECÍFICAS
   -------------------------------------------- */
@media (max-width: 480px) {
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .modal__content {
        margin: var(--space-2);
        max-height: 95vh;
    }
    
    .card__price {
        font-size: var(--text-3xl);
    }
    
    .footer__grid {
        gap: var(--space-6);
    }
}

@media (min-width: 481px) and (max-width: 768px) {
    .btn--lg {
        padding: var(--space-3) var(--space-6);
    }
}

@media (min-width: 1921px) {
    .container {
        max-width: 1600px;
    }
    
    html {
        font-size: 18px;
    }
}