/* ==================== VARIABLES CSS ==================== */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-dark: #111827;
    --border-color: #e5e7eb;
    --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);
    --transition: all 0.3s ease;
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

ul {
    list-style: none;
}

/* ==================== CONTAINER ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ==================== HEADER & NAVIGATION ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    box-shadow: var(--shadow-md);
    z-index: 1000;
}

.navbar {
    padding: 1rem 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo img {
    width: 40px;
    height: 40px;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-menu li a {
    font-weight: 500;
    transition: var(--transition);
}

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

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    transition: var(--transition);
}

/* ==================== BUTTONS ==================== */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

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

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

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

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

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

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

.btn-download {
    background-color: var(--secondary-color);
    color: white;
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
}

.btn-download:hover {
    background-color: #059669;
}

.btn-download-large {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    background-color: var(--primary-color);
    color: white;
    border-radius: 10px;
}

.btn-download-large:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

/* ==================== HERO SECTION ==================== */
.hero {
    padding: 150px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.highlight {
    color: var(--accent-color);
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
}

.hero-image img {
    border-radius: 15px;
    box-shadow: var(--shadow-xl);
}

/* ==================== SECTIONS ==================== */
section {
    padding: 80px 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

/* ==================== FEATURES SECTION ==================== */
.features {
    background-color: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--bg-primary);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: white;
}

.feature-icon svg {
    width: 30px;
    height: 30px;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==================== BENEFITS SECTION ==================== */
.benefits {
    background-color: var(--bg-primary);
}

.benefits-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.benefits-text h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

.benefits-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.benefits-list li {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.benefits-list svg {
    width: 24px;
    height: 24px;
    color: var(--secondary-color);
    flex-shrink: 0;
    margin-top: 2px;
}

/* ==================== CAROUSEL DE BENEFICIOS ==================== */
.benefits-carousel {
    position: relative;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.carousel-container {
    position: relative;
    min-height: 350px;
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.6s ease-in-out;
    text-align: center;
    color: white;
    padding: 20px;
}

.carousel-slide.active {
    opacity: 1;
    transform: translateX(0);
    position: relative;
}

.carousel-slide.prev {
    transform: translateX(-100%);
    opacity: 0;
}

.benefit-icon {
    margin: 0 auto 20px;
    width: 100px;
    height: 100px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
}

.benefit-icon svg {
    color: white;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
}

.carousel-slide h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: white;
    font-weight: 700;
}

.carousel-slide p {
    font-size: 1.1rem;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.95);
    max-width: 500px;
    margin: 0 auto;
}

/* Controles del carrusel */
.carousel-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
}

.carousel-prev,
.carousel-next {
    background-color: rgba(255, 255, 255, 0.3);
    border: none;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.carousel-prev:hover,
.carousel-next:hover {
    background-color: rgba(255, 255, 255, 0.5);
    transform: scale(1.1);
}

.carousel-dots {
    display: flex;
    gap: 10px;
}

.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    padding: 0;
}

.carousel-dot.active {
    background-color: white;
    width: 30px;
    border-radius: 5px;
}

.carousel-dot:hover {
    background-color: rgba(255, 255, 255, 0.7);
}

/* ==================== PRICING SECTION ==================== */
.pricing {
    background-color: var(--bg-secondary);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.pricing-card {
    background-color: var(--bg-primary);
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    position: relative;
    transition: var(--transition);
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.pricing-card.featured {
    border: 3px solid var(--primary-color);
}

.badge {
    position: absolute;
    top: -15px;
    right: 20px;
    background-color: var(--accent-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.85rem;
}

.pricing-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.price {
    display: flex;
    align-items: flex-start;
    margin-bottom: 2rem;
}

.currency {
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: 0.5rem;
}

.amount {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
}

.period {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-top: 1.5rem;
    margin-left: 0.5rem;
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.features-list li {
    display: flex;
    align-items: center;
    color: var(--text-secondary);
}

.features-list li.disabled {
    color: var(--text-light);
}

.pricing-card .btn {
    width: 100%;
}

/* ==================== DOWNLOAD SECTION ==================== */
.download {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

.download-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.download-content > p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.download-info {
    font-size: 0.9rem;
    opacity: 0.8;
    margin-bottom: 0.5rem;
}

.download-requirements {
    font-size: 0.85rem;
    opacity: 0.7;
}

/* ==================== CONTACT SECTION ==================== */
.contact {
    background-color: var(--bg-secondary);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    gap: 1.5rem;
}

.contact-item svg {
    width: 40px;
    height: 40px;
    color: var(--primary-color);
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.contact-item p {
    color: var(--text-secondary);
}

.contact-form {
    background-color: var(--bg-primary);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.contact-form .btn {
    width: 100%;
}

/* ==================== FOOTER ==================== */
.footer {
    background-color: var(--bg-dark);
    color: white;
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-col h4 {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.footer-col p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

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

.footer-col ul li a:hover {
    color: white;
    padding-left: 5px;
}

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

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

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

.social-links svg {
    width: 20px;
    height: 20px;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-light);
}

.footer-bottom p:first-child {
    margin-bottom: 0.5rem;
}

/* ==================== BACK TO TOP BUTTON ==================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    z-index: 999;
}

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-5px);
}

.back-to-top.show {
    display: flex;
}

.back-to-top svg {
    width: 24px;
    height: 24px;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 1024px) {
    .hero .container,
    .benefits-content,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }

    /* Carrusel en tablets */
    .benefits-carousel {
        padding: 30px 20px;
    }

    .carousel-slide {
        min-height: 320px;
    }

    .carousel-slide h3 {
        font-size: 1.5rem;
    }

    .carousel-slide p {
        font-size: 1rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background-color: var(--bg-primary);
        flex-direction: column;
        padding: 2rem;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero {
        padding: 120px 0 60px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid,
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .download-buttons {
        flex-direction: column;
    }

    /* Carrusel en móviles */
    .benefits-carousel {
        padding: 25px 15px;
    }

    .carousel-container {
        min-height: 380px;
    }

    .carousel-slide {
        padding: 10px;
    }

    .benefit-icon {
        width: 80px;
        height: 80px;
        margin-bottom: 15px;
    }

    .benefit-icon svg {
        width: 60px;
        height: 60px;
    }

    .carousel-slide h3 {
        font-size: 1.3rem;
        margin-bottom: 12px;
    }

    .carousel-slide p {
        font-size: 0.95rem;
    }

    .carousel-prev,
    .carousel-next {
        width: 35px;
        height: 35px;
        font-size: 20px;
    }

    .carousel-controls {
        gap: 15px;
        margin-top: 20px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }

    .carousel-container {
        min-height: 400px;
    }

    .carousel-slide h3 {
        font-size: 1.2rem;
    }

    .carousel-slide p {
        font-size: 0.9rem;
        padding: 0 10px;
    }
}