:root {
    /* Core colors */
    --primary: #2563EB;
    --primary-dark: #1D4ED8;
    --secondary: #10B981;
    --accent: #7C3AED;
    
    /* Text colors */
    --text-primary: #1F2937;
    --text-secondary: #4B5563;
    --text-light: #9CA3AF;
    
    /* Background colors */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F3F4F6;
    --bg-accent: #EEF2FF;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #2563EB, #7C3AED);
    --gradient-secondary: linear-gradient(135deg, #10B981, #3B82F6);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 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);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;
}

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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-primary);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
}

/* Header & Navigation */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo img {
    height: 50px;
    width: auto;
    transition: transform 0.3s ease;
}

.logo img:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
    transition: color 0.3s ease;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

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

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

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

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

.btn-outline {
    border: 2px solid var(--primary);
    color: var(--primary);
    background: transparent;
}

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

.btn-whatsapp {
    background: #25D366;
    color: white;
    width: 3rem;
    height: 3rem;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    font-size: 1.5rem;
}

.btn-whatsapp:hover {
    background: #128C7E;
    transform: scale(1.1);
}

/* Hero Section */
.hero {
    background: var(--gradient-primary);
    min-height: 100vh;
    padding: 180px 20px 60px;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="20" height="20" viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><circle cx="2" cy="2" r="1" fill="rgba(255,255,255,0.1)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    color: white;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
    opacity: 0.9;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    display: block;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

/* Featured Courses */
.featured-courses {
    padding: var(--spacing-xl) var(--spacing-lg);
    background: var(--bg-secondary);
}

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

.section-header h2 {
    font-size: 2.5rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto var(--spacing-xl);
}

.course-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

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

.course-card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.course-card-header i {
    font-size: 2rem;
    color: var(--primary);
}

.course-card h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
}

.course-features {
    list-style: none;
    margin-bottom: var(--spacing-lg);
}

.course-features li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.course-features li::before {
    content: '•';
    color: var(--primary);
}

/* Why Choose Us */
.why-choose-us {
    padding: var(--spacing-xl) var(--spacing-lg);
    background: var(--bg-accent);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    text-align: center;
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

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

.feature-card i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

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

/* CTA Section */
.cta-section {
    background: var(--gradient-primary);
    padding: var(--spacing-xl) var(--spacing-lg);
    color: white;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.cta-form {
    display: grid;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.cta-form input,
.cta-form select {
    padding: 1rem;
    border-radius: var(--radius-md);
    border: none;
    font-size: 1rem;
}

/* FAQ Section */
.faq-section {
    padding: var(--spacing-xl) var(--spacing-lg);
    background: var(--bg-secondary);
}

.faq-grid {
    max-width: 800px;
    margin: 0 auto;
}

.accordion-item {
    background: white;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

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

.accordion-trigger {
    width: 100%;
    padding: var(--spacing-lg);
    background: transparent;
    border: none;
    text-align: left;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.accordion-trigger::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--primary);
    transition: transform 0.3s ease;
}

.accordion-item[data-active="true"] .accordion-trigger::after {
    transform: rotate(45deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    padding: 0 var(--spacing-lg);
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.accordion-item[data-active="true"] .accordion-content {
    max-height: 300px;
    padding: 0 var(--spacing-lg) var(--spacing-lg);
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-lg);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.footer-section h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
}

.footer-section p {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
}

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

.social-links a {
    color: white;
    font-size: 1.5rem;
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.1);
}

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

.social-links a.facebook:hover {
    background: #1877F2;
}

.social-links a.instagram:hover {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
}

.social-links a.linkedin:hover {
    background: #0A66C2;
}

.social-links a.youtube:hover {
    background: #FF0000;
}

.social-links a.twitter:hover {
    background: #1DA1F2;
}

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

.footer-section ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-section ul li a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: white;
}

.footer-section address {
    font-style: normal;
    color: var(--text-light);
}

.footer-section address p {
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-section address a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section address a:hover {
    color: white;
}

.footer-bottom {
    max-width: 1200px;
    margin: var(--spacing-xl) auto 0;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: var(--text-light);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        padding: var(--spacing-sm);
    }
    
    .nav-links {
        flex-direction: column;
        text-align: center;
        margin: var(--spacing-md) 0;
    }
    
    .nav-actions {
        width: 100%;
        justify-content: center;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .course-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-up {
    animation: fadeInUp 0.6s ease forwards;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.animate-slide-in {
    animation: slideIn 0.6s ease forwards;
}

/* Page Header */
.page-header {
    background: var(--gradient-primary);
    padding: calc(var(--spacing-xl) * 2) var(--spacing-lg) var(--spacing-xl);
    text-align: center;
    color: white;
    margin-top: 80px;
}

.page-header h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.page-header p {
    font-size: 1.25rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* Courses Grid Layout */
.courses-grid {
    padding: var(--spacing-xl) 0;
}

.course-category {
    margin-bottom: var(--spacing-xl);
}

.course-category h2 {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.course-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.course-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

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

.course-card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.course-card-header i {
    font-size: 2rem;
    color: var(--primary);
    background: var(--bg-accent);
    width: 4rem;
    height: 4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
}

.course-card h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin: 0;
}

.course-features {
    list-style: none;
    margin: 0 0 var(--spacing-lg);
    padding: 0;
    flex-grow: 1;
}

.course-features li {
    padding: 0.75rem 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 1px solid var(--bg-secondary);
}

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

.course-features li::before {
    content: '✓';
    color: var(--secondary);
    font-weight: bold;
}

.course-footer {
    margin-top: auto;
}

.course-footer .btn {
    width: 100%;
    justify-content: center;
}

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

/* Success Message */
.success-message {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--bg-accent);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
}

.success-message i {
    font-size: 3rem;
    color: var(--secondary);
    margin-bottom: var(--spacing-md);
}

.success-message h3 {
    margin-bottom: var(--spacing-sm);
}

/* Accessibility Improvements */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary);
    color: white;
    padding: 8px;
    z-index: 1001;
    transition: top 0.3s ease;
}

.skip-link:focus {
    top: 0;
}

/* Breadcrumb Styles */
.breadcrumb {
    background: var(--bg-secondary);
    padding: var(--spacing-sm) 0;
    margin-top: 80px;
    border-bottom: 1px solid rgba(0,0,0,0.1);
}

.breadcrumb ol {
    list-style: none;
    display: flex;
    gap: var(--spacing-sm);
    margin: 0;
    padding: 0;
}

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

.breadcrumb li:not(:last-child)::after {
    content: '/';
    margin-left: var(--spacing-sm);
    color: var(--text-light);
}

.breadcrumb a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* Enhanced Mobile Styles */
@media (max-width: 768px) {
    .course-card {
        margin: var(--spacing-sm);
        padding: var(--spacing-md);
    }

    .course-actions {
        flex-direction: column;
    }

    .course-actions .btn {
        width: 100%;
        margin-bottom: var(--spacing-sm);
    }

    .nav-links {
        gap: var(--spacing-sm);
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .breadcrumb {
        padding: var(--spacing-sm) var(--spacing-md);
    }
}

/* Touch-friendly Improvements */
@media (hover: none) {
    .btn, .course-card, .nav-links a {
        min-height: 44px;
        min-width: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .course-features li {
        padding: var(--spacing-sm) 0;
    }
}

/* Loading States */
.loading-state {
    position: relative;
    overflow: hidden;
    background: var(--bg-secondary);
}

.loading-state::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    animation: loading-shine 1.5s infinite;
}

@keyframes loading-shine {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* Focus Styles */
:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}

/* Enhanced Button Styles */
.btn {
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 300%;
    height: 300%;
    background: radial-gradient(circle, rgba(255,255,255,0.2) 0%, transparent 60%);
    transform: translate(-50%, -50%) scale(0);
    transition: transform 0.5s ease;
}

.btn:active::after {
    transform: translate(-50%, -50%) scale(1);
}

.disclaimer-banner {
    background-color: #ff9800;
    color: #fff;
    padding: 12px 0;
    font-weight: 600;
    font-size: 1.1rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    z-index: 999;
}

.disclaimer-banner marquee {
    width: 100%;
}

.disclaimer-banner marquee:hover {
    animation-play-state: paused;
}