/**
 * main.css - Estilos Principales
 * Portal de Clientes MVP
 * 
 * Estructura:
 * 1. Variables CSS (Custom Properties)
 * 2. Reset y Base
 * 3. Tipografía
 * 4. Layout / Container
 * 5. Componentes Comunes
 * 6. Header / Navegación
 * 7. Hero Section
 * 8. Plans Section
 * 9. Templates Section
 * 10. How It Works Section
 * 11. Footer
 * 12. Utilidades
 * 13. Responsive
 */

/* ============================================================================
   1. VARIABLES CSS (Custom Properties)
   ============================================================================ */

:root {
    /* Colores primarios - FOXPLAIN */
    --color-primary: #ff7a00; /* naranja principal */
    --color-primary-dark: #e05f00; /* naranja más oscuro */
    --color-primary-light: #ff9a3c; /* naranja claro */
    --color-primary-gradient: linear-gradient(135deg, #ff7a00 0%, #ff9a3c 45%, #ff4b00 100%);

    /* Colores secundarios (apoyo, más cálidos) */
    --color-secondary: #ff9a3c;
    --color-secondary-dark: #e17d1f;
    --color-secondary-light: #ffd2a3;
    
    /* Colores de estado */
    --color-success: #48bb78;
    --color-success-light: #c6f6d5;
    --color-warning: #ed8936;
    --color-warning-light: #feebc8;
    --color-error: #e53e3e;
    --color-error-light: #fed7d7;
    --color-info: #4299e1;
    --color-info-light: #bee3f8;
    
    /* Grises */
    --color-gray-50: #f7fafc;
    --color-gray-100: #edf2f7;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e0;
    --color-gray-400: #a0aec0;
    --color-gray-500: #718096;
    --color-gray-600: #4a5568;
    --color-gray-700: #2d3748;
    --color-gray-800: #1a202c;
    --color-gray-900: #171923;
    
    /* Texto */
    --color-text-primary: #1a202c;
    --color-text-secondary: #4a5568;
    --color-text-muted: #718096;
    --color-text-light: #a0aec0;
    --color-text-inverse: #ffffff;
    
    /* Fondos */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f7fafc;
    --color-bg-tertiary: #edf2f7;
    
    /* Bordes */
    --color-border: #e2e8f0;
    --color-border-light: #edf2f7;
    --color-border-dark: #cbd5e0;
    
    /* Tipografía */
    --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-family-mono: 'SF Mono', SFMono-Regular, Consolas, 'Liberation Mono', Menlo, monospace;
    
    /* Tamaños de fuente */
    --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-size-5xl: 3rem;      /* 48px */
    
    /* Pesos de fuente */
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Altura de línea */
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* Espaciado */
    --spacing-1: 0.25rem;   /* 4px */
    --spacing-2: 0.5rem;    /* 8px */
    --spacing-3: 0.75rem;   /* 12px */
    --spacing-4: 1rem;      /* 16px */
    --spacing-5: 1.25rem;   /* 20px */
    --spacing-6: 1.5rem;    /* 24px */
    --spacing-8: 2rem;      /* 32px */
    --spacing-10: 2.5rem;   /* 40px */
    --spacing-12: 3rem;     /* 48px */
    --spacing-16: 4rem;     /* 64px */
    --spacing-20: 5rem;     /* 80px */
    --spacing-24: 6rem;     /* 96px */
    
    /* Border Radius */
    --radius-sm: 0.25rem;   /* 4px */
    --radius-md: 0.5rem;    /* 8px */
    --radius-lg: 0.75rem;   /* 12px */
    --radius-xl: 1rem;      /* 16px */
    --radius-2xl: 1.5rem;   /* 24px */
    --radius-full: 9999px;
    
    /* 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);
    
    /* Transiciones */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    
    /* Z-index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-tooltip: 600;
    
    /* Contenedor */
    --container-max-width: 1200px;
    --container-padding: 1rem;
}


/* ============================================================================
   2. RESET Y BASE
   ============================================================================ */

*,
*::before,
*::after {
    box-sizing: border-box;
}

* {
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    min-height: 100vh;
}

img,
picture,
video,
canvas,
svg {
    display: block;
    max-width: 100%;
    height: auto;
}

input,
button,
textarea,
select {
    font: inherit;
    color: inherit;
}

button {
    cursor: pointer;
    background: none;
    border: none;
}

a {
    color: inherit;
    text-decoration: none;
}

ul,
ol {
    list-style: none;
}

/* ============================================================================
   3. TIPOGRAFÍA
   ============================================================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--color-text-primary);
}

h1 {
    font-size: var(--font-size-4xl);
}

h2 {
    font-size: var(--font-size-3xl);
}

h3 {
    font-size: var(--font-size-2xl);
}

h4 {
    font-size: var(--font-size-xl);
}

h5 {
    font-size: var(--font-size-lg);
}

h6 {
    font-size: var(--font-size-base);
}

p {
    margin-bottom: var(--spacing-4);
}

p:last-child {
    margin-bottom: 0;
}

strong, b {
    font-weight: var(--font-weight-semibold);
}

small {
    font-size: var(--font-size-sm);
}

/* ============================================================================
   4. LAYOUT / CONTAINER
   ============================================================================ */

.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-12);
}

.section-header h2 {
    margin-bottom: var(--spacing-4);
}

.section-header p {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================================================
   5. COMPONENTES COMUNES
   ============================================================================ */

/* Botones */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    line-height: 1;
    text-align: center;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.3);
}

.btn--primary {
    background: var(--color-primary-gradient);
    color: var(--color-text-inverse);
    border-color: transparent;
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn--outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn--outline:hover {
    background: var(--color-primary);
    color: var(--color-text-inverse);
}

.btn--secondary {
    background: var(--color-gray-100);
    color: var(--color-text-secondary);
    border-color: var(--color-gray-100);
}

.btn--secondary:hover {
    background: var(--color-gray-200);
    border-color: var(--color-gray-200);
}

.btn--lg {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-lg);
}

.btn--sm {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-sm);
}

.btn--block {
    width: 100%;
}

.btn:disabled,
.btn.disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Iconos */
.icon {
    width: 1.25em;
    height: 1.25em;
    flex-shrink: 0;
}

/* Alertas */
.alert {
    padding: var(--spacing-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-4);
    font-size: var(--font-size-sm);
}

.alert--success {
    background-color: var(--color-success-light);
    color: #276749;
    border: 1px solid #9ae6b4;
}

.alert--error {
    background-color: var(--color-error-light);
    color: #c53030;
    border: 1px solid #fc8181;
}

.alert--warning {
    background-color: var(--color-warning-light);
    color: #c05621;
    border: 1px solid #fbd38d;
}

.alert--info {
    background-color: var(--color-info-light);
    color: #2b6cb0;
    border: 1px solid #90cdf4;
}

/* ============================================================================
   6. HEADER / NAVEGACIÓN
   ============================================================================ */

.header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-4) 0;
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-6);
}

.header__logo a {
    display: flex;
    align-items: center;
}

.header__logo img {
    height: 40px;
    width: auto;
}

.header__nav ul {
    display: flex;
    align-items: center;
    gap: var(--spacing-8);
}

.header__nav a {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.header__nav a:hover {
    color: var(--color-primary);
}

.header__actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.header__mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    padding: 4px;
}

.header__mobile-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* ============================================================================
   7. HERO SECTION
   ============================================================================ */

.hero {
    padding: var(--spacing-16) 0 var(--spacing-20);
    background: var(--color-bg-secondary);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-12);
    align-items: center;
}

.hero__content h1 {
    font-size: var(--font-size-5xl);
    margin-bottom: var(--spacing-6);
    background: var(--color-primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-8);
    line-height: var(--line-height-relaxed);
}

.hero__cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-4);
}

.hero__image {
    display: flex;
    justify-content: center;
}

.hero__image img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
}

/* ============================================================================
   8. PLANS SECTION
   ============================================================================ */

.plans {
    padding: var(--spacing-20) 0;
}

.plans__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-8);
    max-width: 900px;
    margin: 0 auto;
}

.plan-card {
    position: relative;
    background: var(--color-bg-primary);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-8);
    transition: all var(--transition-base);
}

.plan-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-xl);
}

.plan-card--featured {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-xl);
}

.plan-card__badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary-gradient);
    color: var(--color-text-inverse);
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.plan-card__header {
    text-align: center;
    padding-bottom: var(--spacing-6);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--spacing-6);
}

.plan-card__header h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-4);
}

.plan-card__price .price {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

.plan-card__body {
    margin-bottom: var(--spacing-6);
}

.plan-card__features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.plan-card__features li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.plan-card__features li.included .icon {
    color: var(--color-success);
}

.plan-card__features li.not-included {
    color: var(--color-text-muted);
}

.plan-card__features li.not-included .icon {
    color: var(--color-gray-400);
}

.plan-card__footer {
    padding-top: var(--spacing-6);
    border-top: 1px solid var(--color-border);
}

/* ============================================================================
   9. TEMPLATES SECTION
   ============================================================================ */

.templates {
    padding: var(--spacing-20) 0;
    background: var(--color-bg-secondary);
}

.templates__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-10);
}

.template-card {
    background: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.template-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.template-card__image {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
}

.template-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.template-card:hover .template-card__image img {
    transform: scale(1.05);
}

.template-card__content {
    padding: var(--spacing-4);
}

.template-card__content h4 {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-1);
}

.template-card__content p {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.templates__cta {
    text-align: center;
}

/* ============================================================================
   10. HOW IT WORKS SECTION
   ============================================================================ */

.how-it-works {
    padding: var(--spacing-20) 0;
}

.steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-8);
}

.step {
    text-align: center;
    position: relative;
}

.step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 28px;
    right: -20%;
    width: 40%;
    height: 2px;
    background: var(--color-border);
}

.step__number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: var(--color-primary-gradient);
    color: var(--color-text-inverse);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-4);
}

.step__content h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-2);
}

.step__content p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
}

/* ============================================================================
   11. FOOTER
   ============================================================================ */

.footer {
    background: var(--color-gray-800);
    color: var(--color-text-inverse);
    padding: var(--spacing-16) 0 var(--spacing-8);
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-10);
    margin-bottom: var(--spacing-10);
}

.footer__brand p {
    margin-top: var(--spacing-4);
    color: var(--color-gray-400);
    font-size: var(--font-size-sm);
}

.footer__links h5,
.footer__contact h5 {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-4);
    color: var(--color-gray-300);
}

.footer__links ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.footer__links a {
    font-size: var(--font-size-sm);
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

.footer__links a:hover {
    color: var(--color-text-inverse);
}

.footer__contact p {
    font-size: var(--font-size-sm);
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-2);
}

.footer__contact a {
    color: var(--color-primary-light);
}

.footer__contact a:hover {
    text-decoration: underline;
}

.footer__bottom {
    padding-top: var(--spacing-8);
    border-top: 1px solid var(--color-gray-700);
    text-align: center;
}

.footer__bottom p {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

/* ============================================================================
   12. UTILIDADES
   ============================================================================ */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-success { color: var(--color-success); }
.text-error { color: var(--color-error); }

.mt-4 { margin-top: var(--spacing-4); }
.mt-8 { margin-top: var(--spacing-8); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-8 { margin-bottom: var(--spacing-8); }

.hidden { display: none !important; }
.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;
}

/* ============================================================================
   13. RESPONSIVE
   ============================================================================ */

/* Tablet */
@media (max-width: 1024px) {
    :root {
        --container-padding: 1.5rem;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero__content h1 {
        font-size: var(--font-size-4xl);
    }
    
    .hero__cta {
        justify-content: center;
    }
    
    .hero__image {
        order: -1;
    }
    
    .plans__grid {
        grid-template-columns: 1fr;
        max-width: 450px;
    }
    
    .templates__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .steps {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-10);
    }
    
    .step:not(:last-child)::after {
        display: none;
    }
    
    .footer__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Móvil */
@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.25rem;
        --font-size-4xl: 1.875rem;
        --font-size-3xl: 1.5rem;
    }
    
    .header__nav,
    .header__actions {
        display: none;
    }
    
    .header__mobile-toggle {
        display: flex;
    }
    
    /* Menú móvil abierto */
    .header.menu-open .header__nav,
    .header.menu-open .header__actions {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg-primary);
        padding: var(--spacing-6);
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-lg);
    }
    
    .header.menu-open .header__nav {
        border-bottom: 1px solid var(--color-border);
        padding-bottom: var(--spacing-4);
        margin-bottom: var(--spacing-4);
    }
    
    .header.menu-open .header__nav ul {
        flex-direction: column;
        gap: var(--spacing-4);
    }
    
    .hero__subtitle {
        font-size: var(--font-size-lg);
    }
    
    .hero__cta {
        flex-direction: column;
    }
    
    .hero__cta .btn {
        width: 100%;
    }
    
    .templates__grid {
        grid-template-columns: 1fr;
    }
    
    .steps {
        grid-template-columns: 1fr;
    }
    
    .footer__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-8);
    }
    
    .plan-card {
        padding: var(--spacing-6);
    }
}

/* Móvil pequeño */
@media (max-width: 480px) {
    :root {
        --container-padding: 1rem;
    }
    
    .hero {
        padding: var(--spacing-10) 0 var(--spacing-12);
    }
    
    .plans,
    .templates,
    .how-it-works {
        padding: var(--spacing-12) 0;
    }
    
    .section-header {
        margin-bottom: var(--spacing-8);
    }
}