/* Variables CSS */
:root {
 --primary-color: #3b82f6; /* Azul Profesional */
 --secondary-color: #6b7280; /* Gris Neutro */
 --accent-color: #aed6f1; /* Azul más claro para detalles */
 --background-light: #f9fafb; /* Blanco Limpio */
 --background-dark: #2c3e50; /* Gris oscuro para contraste */
 --text-color-primary: #374151; /* Texto oscuro */
 --text-color-secondary: #4b5563; /* Texto gris */
 --text-color-light: #ffffff; /* Texto claro */
 --border-color: #e5e7eb; /* Color de borde sutil */
 --font-heading: 'Merriweather', serif;
 --font-body: 'Poppins', sans-serif;
 --spacing-xs: 0.5rem;
 --spacing-sm: 1rem;
 --spacing-md: 1.5rem;
 --spacing-lg: 2rem;
 --spacing-xl: 3rem;
 --radius-sm: 8px;
 --radius-md: 12px;
 --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.1);
 --shadow-md: 0 10px 15px rgba(0, 0, 0, 0.1);
 --transition-speed: 0.3s ease;
}

/* Reset Básico */
*, *::before, *::after {
 margin: 0;
 padding: 0;
 box-sizing: border-box;
}

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

body {
 font-family: var(--font-body);
 color: var(--text-color-primary);
 line-height: 1.6;
 background-color: var(--background-light);
 -webkit-font-smoothing: antialiased;
 -moz-osx-font-smoothing: grayscale;
 overflow-x: hidden; /* Previene desbordamiento horizontal */
}

/* Tipografía */
h1, h2, h3, h4, h5, h6 {
 font-family: var(--font-heading);
 color: var(--text-color-primary);
 margin-bottom: var(--spacing-md);
 line-height: 1.2;
}

h1 {
 font-size: clamp(2.5rem, 6vw, 4rem);
 font-weight: 700;
}

h2 {
 font-size: clamp(2rem, 5vw, 3rem);
 font-weight: 700;
 text-align: center;
}

h3 {
 font-size: clamp(1.5rem, 4vw, 2.2rem);
 font-weight: 600;
}

p {
 font-size: var(--spacing-md);
 margin-bottom: var(--spacing-sm);
}

a {
 color: var(--primary-color);
 text-decoration: none;
 transition: color var(--transition-speed);
}

a:hover {
 color: var(--accent-color);
}

.button {
 display: inline-flex;
 align-items: center;
 justify-content: center;
 padding: var(--spacing-sm) var(--spacing-lg);
 border-radius: var(--radius-sm);
 font-weight: 600;
 cursor: pointer;
 transition: all var(--transition-speed);
 text-transform: uppercase;
 letter-spacing: 0.05em;
 font-size: 1rem;
 border: 2px solid transparent;
}

.primary-button {
 background-color: var(--primary-color);
 color: var(--text-color-light);
 border-color: var(--primary-color);
}

.primary-button:hover {
 background-color: #2563eb; /* Un azul ligeramente más oscuro */
 border-color: #2563eb;
 transform: translateY(-2px);
 box-shadow: var(--shadow-sm);
}

.secondary-button {
 background-color: transparent;
 color: var(--primary-color);
 border-color: var(--primary-color);
}

.secondary-button:hover {
 background-color: var(--primary-color);
 color: var(--text-color-light);
 transform: translateY(-2px);
 box-shadow: var(--shadow-sm);
}

.small-button {
 padding: 0.6rem 1.2rem;
 font-size: 0.9rem;
}

.cta-button {
 padding: var(--spacing-md) var(--spacing-xl);
 font-size: 1.1rem;
 background-color: var(--background-light);
 color: var(--primary-color);
 border-color: var(--background-light);
}

.cta-button:hover {
 background-color: var(--primary-color);
 color: var(--text-color-light);
 border-color: var(--primary-color);
}

/* Layout General */
.container {
 max-width: 1200px;
 margin: 0 auto;
 padding: 0 var(--spacing-md);
}

.section {
 padding: var(--spacing-xl) var(--spacing-md);
 position: relative;
 overflow: hidden;
}

.section-subtitle {
 text-align: center;
 max-width: 700px;
 margin: var(--spacing-sm) auto var(--spacing-xl);
 color: var(--text-color-secondary);
 font-size: 1.1rem;
}

.bg-light {
 background-color: var(--background-light);
}

.bg-gradient {
 background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
 color: var(--text-color-light);
}

.bg-gradient h2, .bg-gradient p {
 color: var(--text-color-light);
}

/* Header (Navbar) */
.header {
 background-color: var(--background-light);
 box-shadow: var(--shadow-sm);
 padding: var(--spacing-sm) 0;
 position: fixed;
 width: 100%;
 top: 0;
 left: 0;
 z-index: 1000;
 transition: background-color var(--transition-speed), box-shadow var(--transition-speed);
}

.header.scrolled {
 background-color: rgba(255, 255, 255, 0.95);
 box-shadow: var(--shadow-md);
}

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

.logo {
 font-family: var(--font-heading);
 font-size: 1.8rem;
 font-weight: 700;
 color: var(--primary-color);
 text-transform: uppercase;
}

.nav-menu {
 list-style: none;
 display: flex;
 gap: var(--spacing-lg);
}

.nav-link {
 font-weight: 600;
 color: var(--text-color-primary);
 padding: 0.5rem 0;
 position: relative;
}

.nav-link::after {
 content: '';
 position: absolute;
 bottom: 0;
 left: 0;
 width: 0;
 height: 2px;
 background-color: var(--primary-color);
 transition: width var(--transition-speed);
}

.nav-link:hover::after,
.nav-link.active::after {
 width: 100%;
}

.nav-toggle {
 display: none;
 flex-direction: column;
 justify-content: space-between;
 width: 30px;
 height: 20px;
 background: none;
 border: none;
 cursor: pointer;
 padding: 0;
 position: relative;
 z-index: 1001;
}

.nav-toggle span {
 display: block;
 width: 100%;
 height: 2px;
 background-color: var(--text-color-primary);
 transition: transform var(--transition-speed), opacity var(--transition-speed);
}

/* Hero Section */
.hero-section {
 display: flex;
 flex-direction: column;
 align-items: center;
 justify-content: center;
 text-align: center;
 background-color: var(--background-dark);
 color: var(--text-color-light);
 padding-top: 80px; /* offset for fixed header */
 position: relative;
 overflow: hidden;
 min-height: 80vh;
}

.hero-section::before {
 content: '';
 position: absolute;
 top: 0;
 left: 0;
 width: 100%;
 height: 100%;
 background: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.6));
 z-index: 1;
}

.hero-image {
 position: absolute;
 top: 0;
 left: 0;
 width: 100%;
 height: 100%;
 object-fit: cover;
 z-index: 0;
}

.hero-content {
 position: relative;
 z-index: 2;
 max-width: 900px;
 padding: var(--spacing-xl) var(--spacing-md);
}

.hero-content h1 {
 color: var(--text-color-light);
 margin-bottom: var(--spacing-lg);
}

.hero-content p {
 font-size: 1.2rem;
 margin-bottom: var(--spacing-xl);
 max-width: 700px;
 margin-left: auto;
 margin-right: auto;
 color: var(--accent-color);
}

.hero-buttons {
 display: flex;
 gap: var(--spacing-md);
 justify-content: center;
 flex-wrap: wrap;
}

/* Features Section */
.features-grid {
 display: grid;
 grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
 gap: var(--spacing-lg);
}

.feature-card {
 background-color: var(--background-light);
 border-radius: var(--radius-md);
 box-shadow: var(--shadow-sm);
 padding: var(--spacing-lg);
 text-align: center;
 transition: transform var(--transition-speed), box-shadow var(--transition-speed);
 display: flex;
 flex-direction: column;
 align-items: center;
 justify-content: space-between;
}

.feature-card:hover {
 transform: translateY(-5px);
 box-shadow: var(--shadow-md);
}

.feature-card img {
 width: 100%;
 height: 200px;
 object-fit: cover;
 border-radius: var(--radius-sm);
 margin-bottom: var(--spacing-md);
}

.feature-card h3 {
 color: var(--primary-color);
 margin-bottom: var(--spacing-sm);
 font-size: 1.4rem;
}

.feature-card p {
 font-size: 1rem;
 color: var(--text-color-secondary);
 flex-grow: 1;
 margin-bottom: var(--spacing-md);
}

/* Dual Layout Section (About Preview, etc.) */
.dual-layout {
 display: flex;
 flex-direction: column;
 gap: var(--spacing-xl);
 align-items: center;
 text-align: center;
}

.dual-layout .layout-image {
 width: 100%;
 max-width: 600px;
 height: auto;
 border-radius: var(--radius-md);
 box-shadow: var(--shadow-sm);
}

.dual-layout .layout-content {
 flex: 1;
}

.dual-layout .layout-content h2 {
 text-align: center;
 margin-bottom: var(--spacing-lg);
}

.dual-layout .layout-content p {
 margin-bottom: var(--spacing-md);
 color: var(--text-color-secondary);
 font-size: 1.1rem;
}

.dual-layout .layout-content ul {
 list-style: none;
 margin-bottom: var(--spacing-lg);
 padding-left: 0;
 text-align: left;
 max-width: 400px;
 margin-left: auto;
 margin-right: auto;
}

.dual-layout .layout-content ul li {
 display: flex;
 align-items: center;
 margin-bottom: var(--spacing-sm);
 font-size: 1.1rem;
 color: var(--text-color-secondary);
}

.dual-layout .layout-content ul li .icon {
 color: var(--primary-color);
 font-size: 1.5rem;
 margin-right: var(--spacing-sm);
}

/* Testimonials Section */
.testimonials-grid {
 display: grid;
 grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
 gap: var(--spacing-lg);
}

.testimonial-card {
 background-color: var(--background-light);
 border-radius: var(--radius-md);
 box-shadow: var(--shadow-sm);
 padding: var(--spacing-lg);
 text-align: center;
 display: flex;
 flex-direction: column;
 align-items: center;
 transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}
.testimonial-card:hover {
 transform: translateY(-5px);
 box-shadow: var(--shadow-md);
}

.testimonial-avatar {
 width: 80px;
 height: 80px;
 border-radius: 50%;
 object-fit: cover;
 margin-bottom: var(--spacing-md);
 border: 3px solid var(--primary-color);
}

.testimonial-text {
 font-style: italic;
 color: var(--text-color-secondary);
 margin-bottom: var(--spacing-sm);
 flex-grow: 1;
}

.testimonial-author {
 font-weight: 600;
 color: var(--text-color-primary);
 font-size: 0.95rem;
}

/* Blog Preview Section */
.blog-grid {
 display: grid;
 grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
 gap: var(--spacing-lg);
 margin-bottom: var(--spacing-xl);
}

.blog-card {
 background-color: var(--background-light);
 border-radius: var(--radius-md);
 box-shadow: var(--shadow-sm);
 overflow: hidden;
 transition: transform var(--transition-speed), box-shadow var(--transition-speed);
 display: flex;
 flex-direction: column;
}

.blog-card:hover {
 transform: translateY(-5px);
 box-shadow: var(--shadow-md);
}

.blog-card img {
 width: 100%;
 height: 200px;
 object-fit: cover;
 display: block;
}

.blog-card h3 {
 margin: var(--spacing-md);
 font-size: 1.3rem;
 flex-grow: 1;
}

.blog-card h3 a {
 color: var(--primary-color);
}

.blog-card p {
 padding: 0 var(--spacing-md) var(--spacing-md) var(--spacing-md);
 color: var(--text-color-secondary);
 font-size: 1rem;
}

.blog-card .read-more {
 display: block;
 padding: var(--spacing-sm) var(--spacing-md);
 color: var(--primary-color);
 font-weight: 600;
 border-top: 1px solid var(--border-color);
 margin-top: auto; /* Pushes to bottom */
}

.blog-card .read-more:hover {
 background-color: var(--accent-color);
 color: var(--text-color-light);
}

.button-center {
 text-align: center;
}

/* FAQ Section */
.accordion-container {
 max-width: 800px;
 margin: var(--spacing-lg) auto;
 border: 1px solid var(--border-color);
 border-radius: var(--radius-md);
 overflow: hidden;
 box-shadow: var(--shadow-sm);
}

.accordion-item {
 border-bottom: 1px solid var(--border-color);
}

.accordion-item:last-child {
 border-bottom: none;
}

.accordion-header {
 width: 100%;
 background-color: var(--background-light);
 padding: var(--spacing-md) var(--spacing-lg);
 border: none;
 text-align: left;
 font-family: var(--font-heading);
 font-size: 1.15rem;
 font-weight: 600;
 color: var(--primary-color);
 cursor: pointer;
 display: flex;
 justify-content: space-between;
 align-items: center;
 transition: background-color var(--transition-speed);
}

.accordion-header:hover {
 background-color: var(--accent-color);
 color: var(--text-color-light);
}
.accordion-header:hover .accordion-icon {
 filter: invert(1);
}

.accordion-header.active {
 background-color: var(--primary-color);
 color: var(--text-color-light);
}
.accordion-header.active .accordion-icon {
 filter: invert(1);
}

.accordion-icon {
 display: inline-block;
 width: 24px;
 height: 24px;
 background-image: url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"%3E%3Cpath fill="%233b82f6" d="M24 10h-10v-10h-4v10h-10v4h10v10h4v-10h10z"/%3E%3C/svg%3E'); /* Plus icon */
 background-size: contain;
 background-repeat: no-repeat;
 transition: transform var(--transition-speed);
}

.accordion-header.active .accordion-icon {
 transform: rotate(45deg); /* Rotates to X for active state */
}

.accordion-content {
 max-height: 0;
 overflow: hidden;
 transition: max-height 0.4s ease-out, padding 0.4s ease-out;
 padding: 0 var(--spacing-lg);
 background-color: var(--background-light);
}

.accordion-content.show {
 max-height: 200px; /* Adjust based on expected content */
 padding: var(--spacing-sm) var(--spacing-lg) var(--spacing-md) var(--spacing-lg);
}

.accordion-content p {
 font-size: 1rem;
 color: var(--text-color-secondary);
}

/* CTA Section */
.cta-section {
 text-align: center;
 padding: var(--spacing-xl) var(--spacing-md);
}

.cta-section h2 {
 color: var(--text-color-light);
 margin-bottom: var(--spacing-sm);
}

.cta-section p {
 font-size: 1.2rem;
 margin-bottom: var(--spacing-lg);
 color: var(--accent-color);
}

/* Footer */
.footer {
 background-color: var(--background-dark);
 color: var(--text-color-light);
 padding: var(--spacing-xl) 0 var(--spacing-sm) 0;
 font-size: 0.95rem;
}

.footer-grid {
 display: grid;
 grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
 gap: var(--spacing-lg);
 margin-bottom: var(--spacing-xl);
}

.footer-col h3 {
 color: var(--primary-color);
 margin-bottom: var(--spacing-sm);
 font-size: 1.2rem;
}

.footer-col p {
 color: var(--accent-color);
 margin-bottom: var(--spacing-sm);
}

.footer-col ul {
 list-style: none;
 padding: 0;
}

.footer-col ul li {
 margin-bottom: 0.5rem;
}

.footer-col ul li a {
 color: var(--accent-color);
 transition: color var(--transition-speed);
}

.footer-col ul li a:hover {
 color: var(--text-color-light);
}

.footer-contact a {
 display: block;
 margin-bottom: var(--spacing-xs);
}

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

.social-links a {
 color: var(--accent-color);
 font-size: 1.5rem;
 display: flex;
 align-items: center;
 justify-content: center;
}

.social-links a:hover {
 color: var(--primary-color);
 transform: translateY(-2px);
}

.social-links a svg {
 fill: currentColor;
 width: 24px;
 height: 24px;
}

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

/* Scroll Animations */
.animate-on-scroll {
 opacity: 0;
 transform: translateY(20px);
 transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.is-visible {
 opacity: 1;
 transform: translateY(0);
}

/* Media Queries */

/* Tablet (768px) */
@media (max-width: 768px) {
 .navbar {
 padding: 0 var(--spacing-sm);
 }

 .nav-menu {
 flex-direction: column;
 position: fixed;
 top: 0;
 right: -100%;
 width: 70%;
 max-width: 300px;
 height: 100vh;
 background-color: var(--background-dark); /* Dark background for mobile menu */
 padding: var(--spacing-xl) var(--spacing-md);
 box-shadow: -2px 0 10px rgba(0, 0, 0, 0.2);
 transition: right var(--transition-speed);
 z-index: 999;
 justify-content: center;
 align-items: center;
 gap: var(--spacing-lg);
 }

 .nav-menu.open {
 right: 0;
 }

 .nav-menu li {
 width: 100%;
 text-align: center;
 }

 .nav-menu li a {
 color: var(--text-color-light); /* Light text in dark menu */
 font-size: 1.3rem;
 display: block;
 padding: var(--spacing-sm) 0;
 }
 .nav-menu li a::after {
 background-color: var(--primary-color); /* Primary color for underline in open menu */
 }

 .nav-toggle {
 display: flex;
 }

 .nav-toggle.active span:nth-child(1) {
 transform: translateY(9px) rotate(45deg);
 }

 .nav-toggle.active span:nth-child(2) {
 opacity: 0;
 }

 .nav-toggle.active span:nth-child(3) {
 transform: translateY(-9px) rotate(-45deg);
 }

 .hero-content {
 padding: var(--spacing-lg) var(--spacing-sm);
 }

 .hero-content h1 {
 font-size: clamp(2rem, 8vw, 3rem);
 }

 .hero-content p {
 font-size: 1rem;
 }

 .hero-buttons {
 flex-direction: column;
 gap: var(--spacing-sm);
 }

 .dual-layout {
 flex-direction: column;
 }
 .dual-layout:nth-child(even) { /* Reverse order for even sections */
 flex-direction: column;
 }

 .dual-layout .layout-content h2,
 .dual-layout .layout-content p {
 text-align: center;
 }

 .features-grid,
 .testimonials-grid,
 .blog-grid {
 grid-template-columns: 1fr;
 }

 .section {
 padding: var(--spacing-lg) var(--spacing-sm);
 }

 .footer-grid {
 grid-template-columns: 1fr;
 text-align: center;
 }

 .footer-col ul {
 display: flex;
 flex-direction: column;
 align-items: center
}
}