/* ============================================
   CSS PROFESIONAL OPTIMIZADO PARA SEO & UX
   Core Web Vitals: LCP, CLS, INP óptimos
   ============================================ */

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

:root {
    --primary: #9d0208;
    --primary-dark: #6a040f;
    --primary-light: #dc2f02;
    --secondary: #ffba08;
    --accent: #f48c06;
    --dark: #1f2937;
    --darker: #111827;
    --light: #f9fafb;
    --lighter: #f3f4f6;
    --gray: #6b7280;
    --white: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
    font-family: var(--font-family);
    line-height: 1.7;
    color: var(--dark);
    background-color: var(--light);
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    transition: var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-lg);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition-base);
    letter-spacing: -0.025em;
}

.logo:hover {
    color: var(--primary-dark);
    transform: scale(1.02);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 0.375rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger-line {
    width: 1.75rem;
    height: 0.1875rem;
    background: var(--dark);
    transition: var(--transition-base);
    border-radius: 9999px;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    list-style: none;
    align-items: center;
}

.nav-menu a {
    color: var(--dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: var(--transition-base);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -0.25rem;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition-base);
}

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

.nav-menu a:hover::after,
.nav-menu a[aria-current="page"]::after {
    width: 100%;
}

/* ============================================
   HERO SLIDER
   ============================================ */

.hero-slider {
    margin-top: 4.75rem;
    position: relative;
    height: 38rem;
    overflow: hidden;
}

.slider-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.8s ease, visibility 0.8s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide.active {
    opacity: 1;
    visibility: visible;
}

.slide-content {
    width: 100%;
    text-align: center;
    color: var(--white);
    padding: 4rem 0;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.1;
    animation: fadeInUp 0.8s ease forwards;
    letter-spacing: -0.025em;
}

.hero-description {
    font-size: 1.125rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    max-width: 42rem;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.8s ease 0.2s both;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2.25rem;
    border-radius: 9999px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: var(--transition-base);
    border: 2px solid transparent;
    cursor: pointer;
}

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

.cta-button.primary:hover {
    transform: translateY(-0.25rem);
    box-shadow: 0 1.25rem 2.5rem rgba(0, 0, 0, 0.25);
}

.cta-button.secondary {
    background: transparent;
    color: var(--white);
    border-color: rgba(255, 255, 255, 0.5);
}

.cta-button.secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--white);
    transform: translateY(-0.25rem);
}

/* Slider Controls */
.slider-controls {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.slider-btn {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.5);
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.25rem;
    font-weight: bold;
    transition: var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
}

.slider-btn:hover {
    background: var(--white);
    color: var(--primary);
    border-color: var(--white);
    transform: scale(1.1);
}

.slider-dots {
    display: flex;
    gap: 0.75rem;
}

.dot {
    width: 0.875rem;
    height: 0.875rem;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: var(--transition-base);
    border: 2px solid transparent;
}

.dot.active {
    background: var(--white);
    transform: scale(1.25);
    border-color: rgba(255, 255, 255, 0.5);
}

/* ============================================
   BREADCRUMB
   ============================================ */

.breadcrumb {
    background: var(--white);
    padding: 1rem 0;
    border-bottom: 1px solid var(--lighter);
    box-shadow: var(--shadow-sm);
}

.breadcrumb ol {
    display: flex;
    gap: 0.5rem;
    list-style: none;
    flex-wrap: wrap;
    font-size: 0.875rem;
}

.breadcrumb li {
    display: flex;
    align-items: center;
    color: var(--gray);
}

.breadcrumb li::after {
    content: '›';
    margin-left: 0.75rem;
    font-size: 1.25rem;
    color: var(--gray);
}

.breadcrumb li:last-child::after {
    content: '';
}

.breadcrumb li:last-child {
    color: var(--dark);
    font-weight: 500;
}

.breadcrumb a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition-base);
}

.breadcrumb a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* ============================================
   SECTIONS
   ============================================ */

.section {
    padding: 5rem 0;
}

.section-alt {
    background: var(--white);
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 800;
    text-align: center;
    margin-bottom: 0.75rem;
    color: var(--dark);
    line-height: 1.2;
    letter-spacing: -0.025em;
}

.section-subtitle {
    text-align: center;
    color: var(--gray);
    font-size: 1.125rem;
    margin-bottom: 3rem;
}

/* Introduction Section */
.intro-section {
    background: linear-gradient(to bottom, var(--white), var(--light));
}

.intro-content {
    max-width: 64rem;
    margin: 0 auto;
}

.intro-text {
    font-size: 1.125rem;
    color: var(--dark);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(20rem, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--white);
    padding: 2.25rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-0.75rem);
    box-shadow: var(--shadow-xl);
}

.service-icon {
    width: 4rem;
    height: 4rem;
    margin: 0 auto 1.5rem;
    color: var(--primary);
}

.service-icon svg {
    width: 100%;
    height: 100%;
}

.service-card h3 {
    font-size: 1.375rem;
    margin-bottom: 1rem;
    color: var(--dark);
    font-weight: 700;
}

.service-card p {
    color: var(--gray);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.service-features {
    list-style: none;
    margin-bottom: 1.5rem;
    text-align: left;
}

.service-features li {
    padding: 0.5rem 0;
    color: var(--dark);
    font-size: 0.9375rem;
}

.service-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-base);
}

.service-link:hover {
    color: var(--primary-dark);
    gap: 0.75rem;
}

/* Benefits Grid */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
    gap: 2rem;
}

.benefit-item {
    padding: 2rem;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.benefit-item:hover {
    transform: translateY(-0.5rem);
    box-shadow: var(--shadow-xl);
}

.benefit-item h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--dark);
    font-weight: 700;
}

.benefit-item p {
    color: var(--gray);
    line-height: 1.7;
}

/* Comparison Table */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
}

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

.comparison-table th,
.comparison-table td {
    padding: 1.25rem;
    text-align: center;
    border-bottom: 1px solid var(--lighter);
}

.comparison-table th {
    background: var(--primary);
    color: var(--white);
    font-weight: 700;
}

.comparison-table th:first-child {
    border-radius: var(--radius-lg) 0 0 0;
    text-align: left;
}

.comparison-table th:last-child {
    border-radius: 0 var(--radius-lg) 0 0;
}

.comparison-table td:first-child {
    text-align: left;
    font-weight: 600;
}

.comparison-table .highlight {
    background: rgba(16, 185, 129, 0.1);
    color: var(--secondary);
    font-weight: 600;
}

.comparison-table tr:last-child td:first-child {
    border-radius: 0 0 0 var(--radius-lg);
}

.comparison-table tr:last-child td:last-child {
    border-radius: 0 0 var(--radius-lg) 0;
}

.comparison-table tbody tr:hover {
    background: var(--lighter);
}

/* About Section */
.about-content {
    max-width: 56rem;
    margin: 0 auto;
}

.about-text h3 {
    font-size: 1.5rem;
    margin: 2rem 0 1rem;
    color: var(--dark);
    font-weight: 700;
}

.about-text h3:first-child {
    margin-top: 0;
}

.about-text p {
    color: var(--gray);
    margin-bottom: 1.5rem;
    line-height: 1.8;
    font-size: 1.0625rem;
}

.values-list {
    list-style: none;
    margin-top: 1rem;
}

.values-list li {
    padding: 0.75rem 0;
    color: var(--dark);
    line-height: 1.7;
}

.values-list strong {
    color: var(--primary);
}

/* Related Links */
.related-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
    gap: 2rem;
}

.related-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.related-card:hover {
    transform: translateY(-0.5rem);
    box-shadow: var(--shadow-xl);
}

.related-link {
    display: block;
    padding: 2rem;
    text-decoration: none;
    color: inherit;
    height: 100%;
}

.related-link h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--primary);
    font-weight: 700;
}

.related-link p {
    color: var(--gray);
    line-height: 1.7;
}

/* FAQ Section */
.faq-list {
    max-width: 56rem;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: var(--transition-base);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: 1.5rem;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--dark);
    transition: var(--transition-base);
}

.faq-question:hover {
    color: var(--primary);
}

.faq-icon {
    font-size: 1.5rem;
    transition: var(--transition-base);
    color: var(--primary);
    font-weight: 400;
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-answer[aria-hidden="false"] {
    max-height: 50rem;
}

.faq-answer p {
    padding: 0 1.5rem 1.5rem;
    color: var(--gray);
    line-height: 1.8;
}

/* Contact Section */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 3rem;
    max-width: 72rem;
    margin: 0 auto;
}

.contact-info {
    padding: 2rem;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.contact-info h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--dark);
    font-weight: 700;
}

.contact-item {
    margin-bottom: 1.5rem;
}

.contact-item strong {
    display: block;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.contact-item p,
.contact-item a {
    color: var(--gray);
    text-decoration: none;
    line-height: 1.6;
}

.contact-item a:hover {
    color: var(--primary);
    text-decoration: underline;
}

.contact-form {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--dark);
    font-size: 0.9375rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--lighter);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition-base);
    background: var(--white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 7.5rem;
}

.checkbox-group {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin-top: 0.25rem;
    cursor: pointer;
}

.checkbox-group label {
    font-weight: 400;
    margin-bottom: 0;
}

.checkbox-group a {
    color: var(--primary);
    text-decoration: none;
}

.checkbox-group a:hover {
    text-decoration: underline;
}

.submit-btn {
    background: var(--primary);
    color: var(--white);
    padding: 1rem 2.5rem;
    border: none;
    border-radius: 9999px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    justify-content: center;
}

.submit-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-0.125rem);
    box-shadow: var(--shadow-lg);
}

.btn-icon {
    width: 1.25rem;
    height: 1.25rem;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    background: var(--darker);
    color: var(--white);
    padding: 3.5rem 0 1.5rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-col h4 {
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
    color: var(--white);
    font-weight: 700;
}

.footer-col p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

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

.footer-col li {
    margin-bottom: 0.75rem;
}

.footer-col a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition-base);
}

.footer-col a:hover {
    color: var(--primary-light);
    padding-left: 0.25rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--white);
    transition: var(--transition-base);
}

.social-links a:hover {
    background: var(--primary);
    transform: translateY(-0.25rem);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9375rem;
}

.footer-legal {
    display: flex;
    gap: 1.5rem;
}

.footer-legal a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 0.9375rem;
    transition: var(--transition-base);
}

.footer-legal a:hover {
    color: var(--primary-light);
}

/* ============================================
   BACK TO TOP BUTTON
   ============================================ */

.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3rem;
    height: 3rem;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-0.25rem);
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(2rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   RESPONSIVE STYLES
   ============================================ */

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
        z-index: 1001;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--white);
        padding: 1.5rem;
        gap: 1.25rem;
        display: none;
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .hero-slider {
        height: 32rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .cta-button {
        width: 100%;
    }
    
    .slider-controls {
        gap: 1rem;
    }
    
    .slider-btn {
        width: 2.5rem;
        height: 2.5rem;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .back-to-top {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 2.75rem;
        height: 2.75rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .section {
        padding: 3.5rem 0;
    }
    
    .services-grid,
    .benefits-grid,
    .related-links {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 3px;
}

@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;
    }
}

/* ============================================
   BLOG SECTION
   ============================================ */

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.blog-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.blog-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.blog-image {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.blog-image svg {
    width: 80px;
    height: 80px;
    opacity: 0.9;
}

.blog-content {
    padding: 1.5rem;
}

.blog-date {
    color: var(--gray);
    font-size: 0.875rem;
    display: block;
    margin-bottom: 0.5rem;
}

.blog-content h3 {
    font-size: 1.25rem;
    color: var(--dark);
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.blog-content p {
    color: var(--gray);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.blog-link {
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-base);
}

.blog-link:hover {
    color: var(--primary-dark);
}

.blog-cta {
    text-align: center;
    margin-top: 2rem;
}

@media (max-width: 768px) {
    .blog-grid {
        grid-template-columns: 1fr;
    }
}