/* ═══════════════════════════════════════════════
   ubi-k2 · landing.css
   Paleta: Azul marino #0B2F5E · Verde teal #1D9E75
   Mobile-first responsive
   Fase 2: Secciones de producto + FAQ + Testimonios
═══════════════════════════════════════════════ */

/* === Variables CSS === */
:root {
    --color-primary: #0B2F5E;
    --color-secondary: #1D9E75;
    --color-white: #FFFFFF;
    --color-light: #F8F9FA;
    --color-gray: #6C757D;
    --color-dark: #212529;
    
    --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-base: 16px;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 2.5rem;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* === Reset y base === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-dark);
    background-color: var(--color-white);
}

/* === Header === */
.header {
    position: sticky;
    top: 0;
    background-color: var(--color-white);
    box-shadow: var(--box-shadow);
    z-index: 1000;
    height: 78px; /* Altura fija */
    padding: 6px var(--spacing-md); /* Padding reducido */
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.header-logo img {
    height: 65px;
    width: auto;
    max-width: 180px; /* Previene logos muy anchos en mobile */
}

.header-nav {
    display: none;
    gap: var(--spacing-md);
}

.header-nav a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.header-nav a:hover {
    color: var(--color-secondary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.whatsapp-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: #25D366;
    border-radius: 50%;
    transition: var(--transition);
}

.whatsapp-icon:hover {
    transform: scale(1.1);
    box-shadow: var(--box-shadow);
}

.whatsapp-icon svg {
    width: 24px;
    height: 24px;
    fill: var(--color-white);
}

.btn-login {
    display: none;
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--color-primary);
    color: var(--color-white);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
}

.btn-login:hover {
    background-color: var(--color-secondary);
}

/* === Hero Section === */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, #1a4a8f 100%);
    color: var(--color-white);
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
}

.hero-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

/* === Selector de casos de uso === */
.selector-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.selector-card {
    background-color: var(--color-white);
    color: var(--color-dark);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    box-shadow: var(--box-shadow);
}

.selector-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.selector-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.selector-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.selector-description {
    font-size: var(--font-size-base);
    color: var(--color-gray);
}

/* === Badge Programa de Apoyo === */
.badge-apoyo {
    display: inline-block;
    background-color: var(--color-secondary);
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 600;
    margin-top: var(--spacing-xs);
}

/* === Secciones de producto === */
.section-producto {
    padding: var(--spacing-xl) var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.section-producto:nth-child(even) {
    background-color: var(--color-light);
}

.section-title {
    font-size: var(--font-size-2xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    text-align: center;
    font-weight: 700;
}

.section-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.section-text h3 {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.section-text p {
    color: var(--color-gray);
    margin-bottom: var(--spacing-md);
}

.section-image {
    text-align: center;
}

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

/* === Beneficios === */
.beneficios-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.beneficio-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.beneficio-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.beneficio-text h4 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.beneficio-text p {
    color: var(--color-gray);
    font-size: 0.95rem;
}

/* === CTAs === */
.cta-whatsapp {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: #25D366;
    color: var(--color-white);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
    margin-top: var(--spacing-sm);
}

.cta-whatsapp:hover {
    background-color: #20ba5a;
    transform: translateY(-2px);
    box-shadow: var(--box-shadow);
}

.cta-whatsapp svg {
    width: 20px;
    height: 20px;
    fill: var(--color-white);
}

/* === Cómo Funciona === */
.pasos-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.paso-item {
    text-align: center;
    padding: var(--spacing-lg);
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.paso-numero {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background-color: var(--color-secondary);
    color: var(--color-white);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    border-radius: 50%;
    margin-bottom: var(--spacing-sm);
}

.paso-item h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.paso-item p {
    color: var(--color-gray);
}

/* === Testimonios === */
.testimonios-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.testimonio-card {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.testimonio-text {
    font-style: italic;
    color: var(--color-dark);
    margin-bottom: var(--spacing-md);
}

.testimonio-autor {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.testimonio-avatar {
    width: 50px;
    height: 50px;
    background-color: var(--color-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-weight: 700;
}

.testimonio-info h4 {
    color: var(--color-primary);
    font-size: 1rem;
}

.testimonio-info p {
    color: var(--color-gray);
    font-size: 0.875rem;
}

/* === FAQ === */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-busqueda {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid var(--color-light);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-lg);
    transition: var(--transition);
}

.faq-busqueda:focus {
    outline: none;
    border-color: var(--color-secondary);
}

.faq-item {
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--box-shadow);
    overflow: hidden;
}

.faq-pregunta {
    padding: var(--spacing-md);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    color: var(--color-primary);
    transition: var(--transition);
}

.faq-pregunta:hover {
    background-color: var(--color-light);
}

.faq-icon {
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-respuesta {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0 var(--spacing-md);
}

.faq-item.active .faq-respuesta {
    max-height: 500px;
    padding: 0 var(--spacing-md) var(--spacing-md);
}

.faq-respuesta p {
    color: var(--color-gray);
    line-height: 1.8;
}

/* === Responsive: Tablet (768px+) === */
@media (min-width: 768px) {
    .header-nav {
        display: flex;
    }
    
    .btn-login {
        display: inline-block;
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .selector-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .section-content {
        grid-template-columns: 1fr 1fr;
    }
    
    .beneficios-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pasos-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .testimonios-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* === Responsive: Desktop (1024px+) === */
@media (min-width: 1024px) {
    .selector-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .beneficios-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .pasos-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .testimonios-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* === Utilidades === */
.desktop-only {
    display: none;
}

@media (min-width: 768px) {
    .desktop-only {
        display: block;
    }
}
/* ═══════════════════════════════════════════════
   Fase 3: Formulario Programa de Apoyo + Footer + Polish
═══════════════════════════════════════════════ */

/* === Formulario Programa de Apoyo === */
.formulario-apoyo {
    background: linear-gradient(135deg, var(--color-primary) 0%, #1a4a8f 100%);
    color: var(--color-white);
    padding: var(--spacing-xl) var(--spacing-md);
}

.formulario-container {
    max-width: 700px;
    margin: 0 auto;
    background-color: var(--color-white);
    color: var(--color-dark);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

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

.formulario-header h2 {
    color: var(--color-primary);
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-sm);
}

.formulario-header .badge-gratuito {
    display: inline-block;
    background-color: var(--color-secondary);
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius);
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.formulario-header p {
    color: var(--color-gray);
    font-size: var(--font-size-base);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid var(--color-light);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-family: var(--font-primary);
    transition: var(--transition);
    background-color: var(--color-white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(29, 158, 117, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group .error-message {
    color: #dc3545;
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
    display: none;
}

.form-group.error input,
.form-group.error select,
.form-group.error textarea {
    border-color: #dc3545;
}

.form-group.error .error-message {
    display: block;
}

.btn-whatsapp-form {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: var(--spacing-md);
    background-color: #25D366;
    color: var(--color-white);
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-lg);
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    margin-top: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-whatsapp-form:hover {
    background-color: #20ba5a;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(37, 211, 102, 0.4);
}

.btn-whatsapp-form:active {
    transform: translateY(0);
}

.btn-whatsapp-form svg {
    width: 28px;
    height: 28px;
    fill: var(--color-white);
}

.form-nota {
    text-align: center;
    color: var(--color-gray);
    font-size: 0.875rem;
    margin-top: var(--spacing-sm);
    font-style: italic;
}

/* === Footer Completo === */
.footer-completo {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-xl) var(--spacing-md) var(--spacing-md);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-col h3 {
    color: var(--color-white);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.footer-col p,
.footer-col a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 0.95rem;
    line-height: 1.8;
    transition: var(--transition);
}

.footer-col a:hover {
    color: var(--color-secondary);
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-logo img {
    height: 60px;
    margin-bottom: var(--spacing-sm);
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: var(--transition);
}

.footer-social a:hover {
    background-color: var(--color-secondary);
    transform: translateY(-3px);
}

.footer-social svg {
    width: 20px;
    height: 20px;
    fill: var(--color-white);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    margin: 0 var(--spacing-xs);
}

.footer-bottom a:hover {
    color: var(--color-secondary);
}

/* === Micro-interacciones y Polish === */
.selector-card:active {
    transform: scale(0.98);
}

.beneficio-item {
    transition: var(--transition);
}

.beneficio-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}

.paso-item {
    transition: var(--transition);
}

.paso-item:hover {
    transform: translateY(-4px);
}

.paso-numero {
    transition: var(--transition);
}

.paso-item:hover .paso-numero {
    transform: scale(1.1);
    background-color: var(--color-primary);
}

.testimonio-card {
    transition: var(--transition);
}

.testimonio-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}

/* Botón flotante WhatsApp */
.whatsapp-flotante {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 60px;
    height: 60px;
    background-color: #25D366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(37, 211, 102, 0.4);
    z-index: 999;
    transition: var(--transition);
    animation: pulse 2s infinite;
}

.whatsapp-flotante:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.6);
}

.whatsapp-flotante svg {
    width: 32px;
    height: 32px;
    fill: var(--color-white);
}

@keyframes pulse {
    0% {
        box-shadow: 0 4px 12px rgba(37, 211, 102, 0.4);
    }
    50% {
        box-shadow: 0 4px 20px rgba(37, 211, 102, 0.8);
    }
    100% {
        box-shadow: 0 4px 12px rgba(37, 211, 102, 0.4);
    }
}

/* === Responsive Formulario === */
@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }
    
    .formulario-container {
        padding: var(--spacing-xl) var(--spacing-lg);
    }
}

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

/* Focus visible para accesibilidad */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid var(--color-secondary);
    outline-offset: 2px;
}