:root {
    /* Colors */
    --primary: #15c256;
    --primary-dark: #00a000;
    --primary-light: #5ce88b;
    --secondary: #39b7ea;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --gray: #64748b;
    --gray-light: #e2e8f0;
    --gray-lightest: #f8fafc;
    --white: #ffffff;
    --success: #10b981;
    --warning: #f59e0b;
    
    /* Typography */
    --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
    
    /* Spacing */
    --section-padding: 120px;
    --section-padding-mobile: 60px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--dark);
    background: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

/* ========================================
   NAVIGATION
   ======================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-light);
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo img {
    height: 50px;
    width: auto;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    font-size: 15px;
    transition: var(--transition);
}

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

.btn-nav {
    background: var(--primary);
    color: var(--white) !important;
    padding: 10px 24px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

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

/* ========================================
   HERO SECTION
   ======================================== */

.hero {
    padding-top: 160px;
    padding-bottom: var(--section-padding);
    background: linear-gradient(135deg, var(--gray-lightest) 0%, var(--white) 100%);
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero-tag {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary-dark);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 24px;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    color: var(--dark);
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.hero-description {
    font-size: 1.25rem;
    line-height: 1.7;
    color: var(--gray);
    margin-bottom: 40px;
}

.hero-features {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 40px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--dark);
    font-weight: 500;
}

.feature-icon {
    width: 24px;
    height: 24px;
    color: var(--primary);
    flex-shrink: 0;
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-visual {
    position: relative;
}

.hero-image-wrapper {
    position: relative;
}

.hero-image {
    width: 100%;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    position: relative;
    z-index: 2;
}

.hero-decoration {
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary) 100%);
    border-radius: var(--radius-xl);
    z-index: 1;
    opacity: 0.3;
}

/* ========================================
   BUTTONS
   ======================================== */

.btn-primary,
.btn-secondary {
    display: inline-block;
    padding: 16px 32px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 16px;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    text-align: center;
}

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

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

.btn-secondary {
    background: transparent;
    color: var(--dark);
    border: 2px solid var(--gray-light);
}

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

.btn-large {
    padding: 20px 48px;
    font-size: 18px;
}

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

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-tag {
    display: inline-block;
    background: var(--gray-lightest);
    color: var(--primary);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    line-height: 1.2;
    color: var(--dark);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-description {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--gray);
}

/* ========================================
   ABOUT SECTION
   ======================================== */

.about {
    padding: var(--section-padding) 0;
    background: var(--white);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.about-card {
    text-align: center;
    padding: 40px 30px;
    border-radius: var(--radius-lg);
    background: var(--gray-lightest);
    transition: var(--transition);
}

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

.about-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 24px;
    background: var(--primary-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-icon svg {
    width: 32px;
    height: 32px;
    color: var(--primary-dark);
}

.about-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}

.about-card p {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--gray);
}

/* ========================================
   CONTENT SECTION
   ======================================== */

.content {
    padding: var(--section-padding) 0;
    background: var(--gray-lightest);
}

.content-modules {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}

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

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

.module-header {
    padding: 32px 32px 24px;
}

.module-number {
    display: inline-block;
    background: var(--primary);
    color: var(--white);
    padding: 6px 16px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
}

.module-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 0;
}

.module-image-container {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.module-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.module-topics {
    list-style: none;
    padding: 32px;
}

.module-topics li {
    padding: 12px 0;
    padding-left: 32px;
    position: relative;
    color: var(--dark);
    border-bottom: 1px solid var(--gray-light);
}

.module-topics li:last-child {
    border-bottom: none;
}

.module-topics li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
    font-size: 18px;
}

/* ========================================
   TESTIMONIALS SECTION
   ======================================== */

.testimonials {
    padding: var(--section-padding) 0;
    background: var(--white);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}

.testimonial-card {
    background: var(--gray-lightest);
    border-radius: var(--radius-lg);
    padding: 40px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    transition: var(--transition);
}

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

.stars {
    color: var(--warning);
    font-size: 20px;
    letter-spacing: 2px;
}

.testimonial-text {
    font-size: 1.0625rem;
    line-height: 1.7;
    color: var(--dark);
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 16px;
}

.author-image {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    object-fit: cover;
}

.author-info h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 4px;
}

.author-info p {
    font-size: 0.875rem;
    color: var(--gray);
}

/* ========================================
   STATS SECTION
   ======================================== */

.stats {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    text-align: center;
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 1.125rem;
    opacity: 0.95;
}

/* ========================================
   PRICING SECTION
   ======================================== */

.pricing {
    padding: var(--section-padding) 0;
    background: var(--gray-lightest);
}

.pricing-card {
    max-width: 600px;
    margin: 0 auto;
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.pricing-content {
    padding: 60px;
}

.pricing-header {
    text-align: center;
    margin-bottom: 40px;
}

.pricing-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.pricing-subtitle {
    font-size: 1.125rem;
    color: var(--gray);
}

.pricing-price {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 0;
    border-top: 1px solid var(--gray-light);
    border-bottom: 1px solid var(--gray-light);
}

.price-main {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    margin-bottom: 12px;
}

.price-currency {
    font-size: 2rem;
    font-weight: 600;
    color: var(--dark);
    margin-right: 8px;
    margin-top: 8px;
}

.price-value {
    font-size: 5rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.price-period {
    font-size: 2rem;
    font-weight: 600;
    color: var(--dark);
    margin-top: 8px;
}

.price-installment {
    font-size: 1.125rem;
    color: var(--gray);
}

.pricing-features {
    margin-bottom: 40px;
}

.pricing-features h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 24px;
}

.pricing-features ul {
    list-style: none;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    color: var(--dark);
    font-size: 1.0625rem;
}

.check-icon {
    width: 24px;
    height: 24px;
    color: var(--success);
    flex-shrink: 0;
}

.pricing-guarantee {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 32px;
    padding: 24px;
    background: var(--gray-lightest);
    border-radius: var(--radius-md);
}

.shield-icon {
    width: 32px;
    height: 32px;
    color: var(--primary);
    flex-shrink: 0;
}

.pricing-guarantee p {
    font-size: 0.9375rem;
    color: var(--gray);
    margin: 0;
}

/* ========================================
   FAQ SECTION
   ======================================== */

.faq {
    padding: var(--section-padding) 0;
    background: var(--white);
}

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

.faq-item {
    border-bottom: 1px solid var(--gray-light);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 0;
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--dark);
    transition: var(--transition);
}

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

.faq-icon {
    width: 24px;
    height: 24px;
    color: var(--gray);
    flex-shrink: 0;
    transition: var(--transition);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
    color: var(--primary);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding-bottom: 24px;
}

.faq-answer p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--gray);
}

/* ========================================
   CTA SECTION
   ======================================== */

.cta-section {
    padding: var(--section-padding) 0;
    background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
    color: var(--white);
    text-align: center;
}

.cta-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.cta-description {
    font-size: 1.25rem;
    line-height: 1.7;
    max-width: 700px;
    margin: 0 auto 40px;
    opacity: 0.9;
}

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

.footer {
    padding: 80px 0 40px;
    background: var(--dark);
    color: var(--white);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 60px;
    margin-bottom: 60px;
}

.footer-section h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-section p {
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--gray-light);
}

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

.footer-section ul li {
    margin-bottom: 12px;
}

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

.footer-section ul li a:hover {
    color: var(--primary);
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.875rem;
    color: var(--gray-light);
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--gray-light);
    text-decoration: none;
    transition: var(--transition);
}

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

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

@media (max-width: 1024px) {
    :root {
        --section-padding: 80px;
    }
    
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .hero-visual {
        order: -1;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 60px;
    }
    
    .nav-links {
        display: none;
    }
    
    .hero {
        padding-top: 120px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1.125rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
    }
    
    .about-grid,
    .content-modules,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pricing-content {
        padding: 40px 24px;
    }
    
    .price-value {
        font-size: 3.5rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
}

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

@media (prefers-reduced-motion: no-preference) {
    .about-card,
    .module-card,
    .testimonial-card {
        animation: fadeInUp 0.6s ease-out backwards;
    }
    
    .about-card:nth-child(1) { animation-delay: 0.1s; }
    .about-card:nth-child(2) { animation-delay: 0.2s; }
    .about-card:nth-child(3) { animation-delay: 0.3s; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}