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

:root {
    /* Colors */
    --primary-color: #25D366;
    --primary-dark: #1fb855;
    --secondary-color: #128C7E;
    --accent-color: #FF6B35;
    --dark-bg: #0a0e27;
    --dark-bg-secondary: #141b3d;
    --text-primary: #ffffff;
    --text-secondary: #b8c1ec;
    --text-dark: #1a1a1a;
    --gradient-primary: linear-gradient(135deg, #25D366 0%, #128C7E 100%);
    --gradient-hero: linear-gradient(135deg, #0a0e27 0%, #1a2456 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 12px 48px rgba(0, 0, 0, 0.3);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: #ffffff;
    overflow-x: hidden;
}

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

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

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

/* =================================
   HEADER & NAVIGATION
   ================================= */
.header {
    background: var(--dark-bg);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

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

.logo h1 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

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

.nav a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.nav a:hover,
.nav a.active {
    color: var(--primary-color);
    background: rgba(37, 211, 102, 0.1);
}

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

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* =================================
   HERO SECTION
   ================================= */
.hero {
    background: var(--gradient-hero);
    padding: var(--spacing-xxl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(37, 211, 102, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.hero-features .feature {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-features .icon {
    font-size: 2rem;
    display: block;
    margin-bottom: var(--spacing-xs);
}

.hero-features p {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
}

/* =================================
   BUTTONS & CTAs
   ================================= */
.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 1.1rem;
    transition: var(--transition-normal);
    cursor: pointer;
    border: none;
    text-align: center;
}

.cta-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.3);
}

.cta-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(37, 211, 102, 0.4);
}

.cta-secondary {
    background: white;
    color: var(--secondary-color);
    border: 2px solid var(--primary-color);
}

.cta-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.whatsapp-icon {
    font-size: 1.5rem;
}

/* =================================
   SECTIONS
   ================================= */
.features-section,
.services-section,
.cta-section {
    padding: var(--spacing-xxl) 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--dark-bg);
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    border: 1px solid #f0f0f0;
}

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

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

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--dark-bg);
}

.feature-card p {
    color: #666;
    line-height: 1.7;
}

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

.service-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-normal);
    border: 2px solid transparent;
    cursor: pointer;
}

.service-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.service-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--dark-bg);
}

.service-card p {
    color: #666;
    margin-bottom: var(--spacing-md);
}

.service-link {
    color: var(--primary-color);
    font-weight: 600;
    display: inline-block;
}

/* CTA Section */
.cta-section {
    background: var(--gradient-hero);
    text-align: center;
    color: var(--text-primary);
}

.cta-section h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

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

/* =================================
   FOOTER
   ================================= */
.footer {
    background: var(--dark-bg);
    color: var(--text-secondary);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-col h4 {
    color: var(--text-primary);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

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

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

.footer-col a {
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

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

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

/* =================================
   WHATSAPP FLOATING BUTTON
   ================================= */
.whatsapp-float {
    position: fixed;
    width: 60px;
    height: 60px;
    bottom: 30px;
    right: 30px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.5);
    z-index: 999;
    transition: var(--transition-normal);
    animation: pulse 2s infinite;
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(37, 211, 102, 0.6);
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 4px 20px rgba(37, 211, 102, 0.5);
    }
    50% {
        box-shadow: 0 4px 30px rgba(37, 211, 102, 0.8);
    }
}

/* =================================
   ARTICLE PAGES
   ================================= */
.breadcrumb {
    background: #f8f9fa;
    padding: var(--spacing-sm) 0;
    font-size: 0.9rem;
}

.breadcrumb a {
    color: var(--primary-color);
}

.main-content {
    padding: var(--spacing-xxl) 0;
    background: #ffffff;
}

.article {
    max-width: 900px;
    margin: 0 auto;
}

.page-title {
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--dark-bg);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.article-meta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    color: #666;
    font-size: 0.9rem;
}

.article h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark-bg);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.article h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark-bg);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.article p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #333;
    margin-bottom: var(--spacing-md);
}

.article strong {
    color: var(--dark-bg);
    font-weight: 700;
}

.article ul,
.article ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.article li {
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

/* CTA Boxes */
.cta-box-top,
.cta-box-bottom {
    background: var(--gradient-primary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    margin: var(--spacing-xl) 0;
    color: white;
}

.cta-box-top h3,
.cta-box-bottom h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-sm);
    color: white;
}

.cta-box-top p,
.cta-box-bottom p {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    color: rgba(255, 255, 255, 0.9);
}

.cta-note {
    font-size: 0.9rem;
    margin-top: var(--spacing-sm);
    opacity: 0.9;
}

/* Benefits Grid */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.benefit-item {
    background: #f8f9fa;
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary-color);
}

.benefit-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.benefit-item h3 {
    margin-top: 0;
    font-size: 1.2rem;
}

/* Features List */
.features-list {
    background: #f8f9fa;
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    margin: var(--spacing-xl) 0;
}

.features-list li {
    font-size: 1.05rem;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid #e0e0e0;
}

.features-list li:last-child {
    border-bottom: none;
}

/* Steps Container */
.steps-container {
    margin: var(--spacing-xl) 0;
}

.step {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: #f8f9fa;
    border-radius: var(--radius-md);
}

.step-number {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
}

.step-content h3 {
    margin-top: 0;
    font-size: 1.3rem;
}

.step-content p {
    margin-bottom: 0;
    color: #666;
}

/* Info Box */
.info-box {
    background: #e3f2fd;
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    border-left: 4px solid #2196f3;
    margin: var(--spacing-xl) 0;
}

.info-box h3 {
    color: #1976d2;
    margin-top: 0;
}

.info-box ul {
    margin-bottom: 0;
}

/* Devices Grid */
.devices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-xl) 0;
}

.device-card {
    text-align: center;
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 2px solid #f0f0f0;
}

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

.device-card h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
}

.device-card p {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 0;
}

/* FAQ Section */
.faq-section {
    margin: var(--spacing-xl) 0;
}

.faq-item {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid var(--primary-color);
}

.faq-item h3 {
    color: var(--dark-bg);
    font-size: 1.2rem;
    margin-top: 0;
    margin-bottom: var(--spacing-sm);
}

.faq-item p {
    color: #666;
    margin-bottom: 0;
}

/* Related Links */
.related-links {
    background: #f8f9fa;
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-xl);
}

.related-links h3 {
    margin-top: 0;
}

.related-links ul {
    list-style: none;
    padding-left: 0;
}

.related-links li {
    margin-bottom: var(--spacing-sm);
}

.related-links a {
    color: var(--primary-color);
    font-weight: 600;
    display: inline-block;
    transition: var(--transition-fast);
}

.related-links a:hover {
    transform: translateX(5px);
}

/* =================================
   RESPONSIVE DESIGN
   ================================= */
@media (max-width: 968px) {
    .nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-features {
        flex-direction: column;
        align-items: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .page-title {
        font-size: 2rem;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .cta-button {
        padding: 0.8rem 1.5rem;
        font-size: 1rem;
    }
    
    .whatsapp-float {
        width: 50px;
        height: 50px;
        bottom: 20px;
        right: 20px;
    }
    
    .step {
        flex-direction: column;
    }
}