/* ============================================
   VARIABLES CSS - Sistema de diseño
   ============================================ */
:root {
    /* Colores según specs */
    --color-primary: #1DB954;      /* Verde - solo para acciones/CTAs */
    --color-dark: #1F2933;         /* Charcoal */
    --color-light: #F9FAFB;        /* Off White */
    --color-accent: #F59E0B;       /* Amber */
    
    /* Colores adicionales para UI */
    --color-text: #1F2933;
    --color-text-light: #6B7280;
    --color-white: #FFFFFF;
    --color-border: #E5E7EB;
    
    /* Tipografía */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-weight-normal: 400;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Espaciado */
    --spacing-xs: 0.5rem;    /* 8px */
    --spacing-sm: 1rem;      /* 16px */
    --spacing-md: 1.5rem;    /* 24px */
    --spacing-lg: 2rem;      /* 32px */
    --spacing-xl: 3rem;      /* 48px */
    --spacing-2xl: 4rem;     /* 64px */
    
    /* Breakpoints (mobile-first) */
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
    
    /* Transiciones */
    --transition-base: 0.2s ease;
    --transition-smooth: 0.3s ease;
}

/* ============================================
   RESET Y BASE
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-weight: var(--font-weight-normal);
    color: var(--color-text);
    background-color: var(--color-light);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   ACCESIBILIDAD
   ============================================ */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-sm);
    text-decoration: none;
    z-index: 1000;
}

.skip-link:focus {
    top: 0;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ============================================
   UTILIDADES
   ============================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
}

/* ============================================
   HEADER
   ============================================ */
.header {
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
}

.logo {
    text-decoration: none;
    color: var(--color-text);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

/* Menú hamburguesa (móvil) */
.menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    z-index: 101;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: var(--transition-base);
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Navegación */
.nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.nav.active {
    display: block;
}

.nav-list {
    list-style: none;
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.nav-link {
    color: var(--color-text);
    text-decoration: none;
    font-weight: var(--font-weight-normal);
    padding: var(--spacing-sm);
    display: block;
    transition: var(--transition-base);
}

.nav-link:hover,
.nav-link:focus {
    color: var(--color-primary);
}

.nav-cta {
    margin-top: var(--spacing-sm);
    width: 100%;
    text-align: center;
}

/* Desktop: navegación horizontal */
@media (min-width: 768px) {
    .menu-toggle {
        display: none;
    }
    
    .nav {
        display: block;
        position: static;
        background: none;
        border: none;
        box-shadow: none;
    }
    
    .nav-list {
        flex-direction: row;
        align-items: center;
        padding: 0;
        gap: var(--spacing-lg);
    }
    
    .nav-link {
        padding: 0;
    }
    
    .nav-cta {
        margin-top: 0;
        margin-left: var(--spacing-md);
        width: auto;
    }
}

/* ============================================
   BOTONES
   ============================================ */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 8px;
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
    text-align: center;
    transition: var(--transition-smooth);
    cursor: pointer;
    border: none;
    font-size: 1rem;
    font-family: var(--font-family);
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: #1aa045;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(29, 185, 84, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-text);
    border: 2px solid var(--color-border);
}

.btn-secondary:hover,
.btn-secondary:focus {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1.125rem;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, var(--color-light) 0%, var(--color-white) 100%);
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.hero-subheadline {
    font-size: 1.125rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.hero-keyline {
    font-size: 1rem;
    color: var(--color-text);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-xl);
}

.hero-image {
    margin: var(--spacing-xl) 0;
    max-width: 100%;
    display: flex;
    justify-content: center;
}

.hero-screenshot {
    max-width: 100%;
    width: 100%;
    max-width: 400px;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    border: 1px solid var(--color-border);
    background-color: var(--color-light);
    min-height: 200px;
    object-fit: cover;
}

.hero-ctas {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    align-items: center;
    margin-top: var(--spacing-lg);
}

@media (min-width: 640px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-screenshot {
        max-width: 500px;
    }
    
    .hero-ctas {
        flex-direction: row;
        justify-content: center;
    }
}

@media (min-width: 768px) {
    .hero {
        padding: var(--spacing-2xl) 0 calc(var(--spacing-2xl) * 1.5);
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-subheadline {
        font-size: 1.25rem;
    }
    
    .hero-screenshot {
        max-width: 600px;
    }
}

/* ============================================
   SECCIONES GENERALES
   ============================================ */
section {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--color-text);
}

@media (min-width: 768px) {
    .section-title {
        font-size: 2.5rem;
    }
}

/* ============================================
   CÓMO FUNCIONA
   ============================================ */
.how-it-works {
    background-color: var(--color-white);
}

.steps {
    display: grid;
    gap: var(--spacing-xl);
    max-width: 900px;
    margin: 0 auto;
}

.step {
    text-align: center;
    padding: var(--spacing-lg);
    background-color: var(--color-light);
    border-radius: 12px;
    transition: var(--transition-smooth);
}

.step:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.step-number {
    width: 48px;
    height: 48px;
    background-color: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    margin: 0 auto var(--spacing-md);
}

.step-title {
    font-size: 1.5rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.step-description {
    color: var(--color-text-light);
    font-size: 1rem;
}

.step-screenshot {
    margin-top: var(--spacing-md);
    display: flex;
    justify-content: center;
}

.step-image {
    max-width: 100%;
    width: 100%;
    max-width: 280px;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--color-border);
    background-color: var(--color-light);
    min-height: 150px;
    object-fit: cover;
}

@media (min-width: 768px) {
    .steps {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-lg);
    }
    
    .step-image {
        max-width: 240px;
    }
}

/* ============================================
   SECCIÓN DE ROLES
   ============================================ */
.roles {
    background-color: var(--color-light);
}

.roles-grid {
    display: grid;
    gap: var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.role-card {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: var(--transition-smooth);
}

.role-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.role-emoji {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.role-title {
    font-size: 1.75rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.role-benefits {
    list-style: none;
    margin-bottom: var(--spacing-lg);
    text-align: left;
}

.role-benefits li {
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-md);
    position: relative;
    color: var(--color-text-light);
}

.role-benefits li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: var(--font-weight-bold);
}

.role-closing {
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    margin: var(--spacing-md) 0 var(--spacing-lg);
    font-style: italic;
}

.role-screenshot {
    margin: var(--spacing-lg) 0;
    display: flex;
    justify-content: center;
}

.role-image {
    max-width: 100%;
    width: 100%;
    max-width: 300px;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    border: 1px solid var(--color-border);
    background-color: var(--color-light);
    min-height: 180px;
    object-fit: cover;
}

.role-card .btn {
    width: 100%;
    margin-top: var(--spacing-md);
}

@media (min-width: 768px) {
    .roles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .role-image {
        max-width: 320px;
    }
}

/* ============================================
   BENEFICIOS POR ROL
   ============================================ */
.benefits {
    background-color: var(--color-white);
}

.benefits-section {
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.benefits-section:last-child {
    margin-bottom: 0;
}

.benefits-role-title {
    font-size: 1.5rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
    text-align: center;
    color: var(--color-text);
}

.benefits-list {
    list-style: none;
    display: grid;
    gap: var(--spacing-md);
}

.benefit-item {
    padding: var(--spacing-md);
    background-color: var(--color-light);
    border-radius: 8px;
    border-left: 4px solid var(--color-primary);
    color: var(--color-text);
    font-size: 1.125rem;
}

@media (min-width: 768px) {
    .benefits-section {
        max-width: 800px;
    }
    
    .benefits-list {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ============================================
   CONFIANZA
   ============================================ */
.trust {
    background-color: var(--color-light);
    text-align: center;
}

.trust-content {
    max-width: 800px;
    margin: 0 auto;
    display: grid;
    gap: var(--spacing-lg);
}

.trust-message {
    font-size: 1.125rem;
    color: var(--color-text);
    font-weight: var(--font-weight-semibold);
    padding: var(--spacing-md);
}

@media (min-width: 768px) {
    .trust-content {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ============================================
   CTA FINAL
   ============================================ */
.cta-final {
    background: linear-gradient(135deg, var(--color-primary) 0%, #1aa045 100%);
    color: var(--color-white);
    text-align: center;
    padding: var(--spacing-2xl) 0;
}

.cta-title {
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-lg);
    color: var(--color-white);
}

.cta-subtext {
    margin-top: var(--spacing-md);
    font-size: 1rem;
    opacity: 0.95;
}

.cta-final .btn-primary {
    background-color: var(--color-white);
    color: var(--color-primary);
}

.cta-final .btn-primary:hover,
.cta-final .btn-primary:focus {
    background-color: var(--color-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

@media (min-width: 768px) {
    .cta-title {
        font-size: 2.5rem;
    }
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background-color: var(--color-dark);
    color: var(--color-white);
    padding: var(--spacing-xl) 0;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    text-align: center;
}

.footer-logo .logo-text {
    color: var(--color-white);
}

.footer-nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-link {
    color: var(--color-white);
    text-decoration: none;
    opacity: 0.8;
    transition: var(--transition-base);
}

.footer-link:hover,
.footer-link:focus {
    opacity: 1;
    color: var(--color-primary);
}

@media (min-width: 640px) {
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
    
    .footer-nav-list {
        flex-direction: row;
        gap: var(--spacing-lg);
    }
}

/* ============================================
   ANIMACIONES SUTILES
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.step,
.role-card,
.benefit-item {
    animation: fadeInUp 0.6s ease-out;
}

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