/* ===== CSS Variables ===== */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #f97316;
    --secondary-dark: #ea580c;
    --dark: #1e293b;
    --dark-light: #334155;
    --gray: #64748b;
    --gray-light: #94a3b8;
    --gray-lighter: #e2e8f0;
    --light: #f8fafc;
    --white: #ffffff;
    --success: #22c55e;
    --error: #ef4444;
    --warning: #f59e0b;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    
    --radius: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--dark);
    background-color: var(--white);
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

/* ===== Container ===== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 28px;
    font-family: inherit;
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    box-shadow: 0 4px 14px rgb(37 99 235 / 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgb(37 99 235 / 0.5);
}

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

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

/* Modal button outline variant */
.modal .btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
    margin-top: 12px;
}

.modal .btn-outline:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
}

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

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

.btn-course {
    width: 100%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    padding: 16px;
    font-size: 16px;
}

.btn-course:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgb(37 99 235 / 0.5);
}

.btn-featured {
    background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
    box-shadow: 0 4px 14px rgb(249 115 22 / 0.4);
}

.btn-featured:hover {
    box-shadow: 0 6px 20px rgb(249 115 22 / 0.5);
}

.btn-block {
    width: 100%;
}

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
}

.logo i {
    font-size: 28px;
}

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

.nav a {
    font-weight: 500;
    color: var(--dark);
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

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

.nav a:hover::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--dark);
    cursor: pointer;
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 50%, #06b6d4 100%);
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: url('https://images.unsplash.com/photo-1589939705384-5185137a7f0f?w=1920') center/cover no-repeat;
    opacity: 0.15;
}

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

.hero-content {
    max-width: 700px;
    color: var(--white);
    padding: 100px 0;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.hero-content h1 {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-content h1 span {
    background: linear-gradient(90deg, #fbbf24, #f59e0b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    gap: 48px;
}

.stat {
    text-align: center;
}

.stat strong {
    display: block;
    font-size: 36px;
    font-weight: 700;
}

.stat span {
    font-size: 14px;
    opacity: 0.8;
}

/* ===== Features Section ===== */
.features {
    padding: 80px 0;
    background: var(--light);
    margin-top: -60px;
    position: relative;
    z-index: 2;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--white);
    padding: 32px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius);
    font-size: 28px;
    color: var(--white);
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--dark);
}

.feature-card p {
    font-size: 14px;
    color: var(--gray);
}

/* ===== Section Header ===== */
.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 60px;
}

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(59, 130, 246, 0.1));
    color: var(--primary);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--dark);
}

.section-header p {
    font-size: 16px;
    color: var(--gray);
}

/* ===== Courses Section ===== */
.courses {
    padding: 100px 0;
    background: var(--white);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.course-card {
    position: relative;
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 40px 32px;
    box-shadow: var(--shadow);
    border: 2px solid var(--gray-lighter);
    transition: var(--transition);
}

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

.course-card.featured {
    border-color: var(--secondary);
    transform: scale(1.05);
}

.course-card.featured:hover {
    transform: scale(1.05) translateY(-8px);
}

.course-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 8px 20px;
    background: var(--primary);
    color: var(--white);
    font-size: 12px;
    font-weight: 600;
    border-radius: 50px;
    text-transform: uppercase;
}

.course-badge.popular {
    background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
}

.course-header {
    text-align: center;
    margin-bottom: 24px;
}

.course-header h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.course-header p {
    font-size: 14px;
    color: var(--gray);
}

.course-price {
    text-align: center;
    margin-bottom: 32px;
    padding: 24px;
    background: var(--light);
    border-radius: var(--radius-lg);
}

.course-price .currency {
    font-size: 20px;
    font-weight: 600;
    color: var(--gray);
    vertical-align: top;
}

.course-price .value {
    font-size: 48px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.featured .course-price .value {
    color: var(--secondary);
}

.course-price .period {
    font-size: 20px;
    font-weight: 600;
    color: var(--gray);
}

.course-features {
    margin-bottom: 32px;
}

.course-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-lighter);
    font-size: 14px;
    color: var(--dark-light);
}

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

.course-features i {
    color: var(--success);
    font-size: 16px;
}

/* ===== About Section ===== */
.about {
    padding: 100px 0;
    background: var(--light);
}

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

.about-image {
    position: relative;
}

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

.experience-badge {
    position: absolute;
    bottom: -30px;
    right: -30px;
    width: 150px;
    height: 150px;
    background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

.experience-badge .number {
    font-size: 42px;
    font-weight: 800;
    line-height: 1;
}

.experience-badge .text {
    font-size: 14px;
    text-align: center;
    line-height: 1.3;
}

.about-content h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--dark);
}

.about-content > p {
    font-size: 16px;
    color: var(--gray);
    margin-bottom: 32px;
    line-height: 1.8;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.about-feature {
    display: flex;
    gap: 16px;
}

.about-feature i {
    font-size: 24px;
    color: var(--primary);
    margin-top: 4px;
}

.about-feature h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--dark);
}

.about-feature p {
    font-size: 14px;
    color: var(--gray);
}

/* ===== Testimonials Section ===== */
.testimonials {
    padding: 100px 0;
    background: var(--white);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.testimonial-card {
    background: var(--white);
    padding: 32px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-lighter);
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stars {
    color: #fbbf24;
    margin-bottom: 16px;
}

.stars i {
    font-size: 16px;
}

.testimonial-card p {
    font-size: 15px;
    color: var(--dark-light);
    line-height: 1.8;
    margin-bottom: 24px;
    font-style: italic;
}

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

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

.testimonial-author strong {
    display: block;
    font-size: 16px;
    color: var(--dark);
}

.testimonial-author span {
    font-size: 13px;
    color: var(--gray);
}

/* ===== CTA Section ===== */
.cta {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    text-align: center;
}

.cta-content h2 {
    font-size: 40px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== Contact Section ===== */
.contact {
    padding: 100px 0;
    background: var(--light);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--primary);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--white);
}

.contact-item h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 14px;
    color: var(--gray);
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--dark);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    font-family: inherit;
    font-size: 15px;
    border: 2px solid var(--gray-lighter);
    border-radius: var(--radius);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ===== Footer ===== */
.footer {
    background: var(--dark);
    color: var(--white);
    padding: 80px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand .logo {
    color: var(--white);
    margin-bottom: 16px;
}

.footer-brand p {
    color: var(--gray-light);
    font-size: 14px;
    margin-bottom: 24px;
}

.social-links {
    display: flex;
    gap: 12px;
}

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

.social-links a:hover {
    background: var(--primary);
    transform: translateY(-4px);
}

.footer-links h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 24px;
}

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

.footer-links a {
    color: var(--gray-light);
    font-size: 14px;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    color: var(--gray-light);
    font-size: 14px;
}

.payment-methods {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--gray-light);
    font-size: 14px;
}

/* ===== Modal ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 20px;
    overflow-y: auto;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.modal-overlay.active {
    display: flex;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal {
    background: var(--white);
    border-radius: var(--radius-xl);
    max-width: 550px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    animation: slideUp 0.3s ease;
}

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

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    background: var(--gray-lighter);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
}

.modal-close:hover {
    background: var(--error);
    color: var(--white);
}

.modal-header {
    padding: 32px 32px 0;
    text-align: center;
}

.modal-header h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.modal-header p {
    color: var(--gray);
    font-size: 14px;
}

.modal-body {
    padding: 32px;
    min-height: 300px;
}

.payment-step {
    display: block;
    animation: fadeInStep 0.3s ease;
}

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

.payment-step.hidden {
    display: none !important;
}

/* Step Indicator */
.step-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 32px;
}

.step {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--gray-lighter);
    color: var(--gray);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
}

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

.step.completed {
    background: var(--success);
    color: var(--white);
}

.step-line {
    width: 60px;
    height: 3px;
    background: var(--gray-lighter);
    margin: 0 8px;
}

.step-line.active {
    background: var(--success);
}

.payment-step h4 {
    font-size: 18px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 24px;
    color: var(--dark);
}

/* Order Summary */
.order-summary {
    background: var(--light);
    border-radius: var(--radius);
    padding: 20px;
    margin: 24px 0;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    font-size: 14px;
    color: var(--gray);
}

.summary-row.total {
    border-top: 1px solid var(--gray-lighter);
    padding-top: 16px;
    margin-top: 8px;
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
}

/* PIX Container */
.pix-container {
    text-align: center;
}

.qr-code-wrapper {
    width: 220px;
    height: 220px;
    margin: 0 auto 24px;
    background: var(--light);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.qr-code-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.loading-spinner {
    text-align: center;
    color: var(--gray);
}

.loading-spinner i {
    font-size: 40px;
    margin-bottom: 12px;
    color: var(--primary);
}

.loading-spinner p {
    font-size: 14px;
}

.pix-instructions {
    font-size: 14px;
    color: var(--gray);
    margin-bottom: 16px;
}

.pix-code-container {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}

.pix-code-container input {
    flex: 1;
    padding: 12px;
    border: 2px solid var(--gray-lighter);
    border-radius: var(--radius);
    font-size: 12px;
    font-family: monospace;
    background: var(--light);
}

.btn-copy {
    padding: 12px 16px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-copy:hover {
    background: var(--primary-dark);
}

.pix-timer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px;
    background: #fef3c7;
    border-radius: var(--radius);
    color: var(--warning);
    font-size: 14px;
    margin-bottom: 20px;
}

.payment-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px;
    background: var(--light);
    border-radius: var(--radius);
    color: var(--gray);
    font-size: 14px;
    margin-bottom: 20px;
}

.payment-status i {
    color: var(--primary);
}

/* Success Container */
.success-container {
    text-align: center;
}

.success-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, #22c55e, #16a34a);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.success-icon i {
    font-size: 40px;
    color: var(--white);
}

.success-container h4 {
    font-size: 24px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}

.success-container > p {
    color: var(--gray);
    margin-bottom: 24px;
}

.order-details {
    background: var(--light);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 24px;
    text-align: left;
}

.order-details p {
    padding: 8px 0;
    font-size: 14px;
    color: var(--dark-light);
}

.order-details strong {
    color: var(--dark);
}

/* ===== Utilities ===== */
.hidden {
    display: none !important;
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .courses-grid {
        grid-template-columns: 1fr;
        max-width: 450px;
        margin: 0 auto;
    }
    
    .course-card.featured {
        transform: none;
    }
    
    .course-card.featured:hover {
        transform: translateY(-8px);
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .about-image {
        max-width: 500px;
        margin: 0 auto;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-150%);
        transition: var(--transition);
    }
    
    .nav.active {
        transform: translateY(0);
    }
    
    .menu-toggle {
        display: block;
    }
    
    .hero-content h1 {
        font-size: 36px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 24px;
        align-items: flex-start;
    }
    
    .stat {
        text-align: left;
    }
    
    .stat strong {
        font-size: 28px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .section-header h2 {
        font-size: 28px;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
    
    .cta-content h2 {
        font-size: 28px;
    }
    
    .experience-badge {
        width: 120px;
        height: 120px;
        right: 10px;
        bottom: -20px;
    }
    
    .experience-badge .number {
        font-size: 32px;
    }
}

@media (max-width: 480px) {
    .hero-content {
        padding: 80px 0 60px;
    }
    
    .hero-content h1 {
        font-size: 28px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .course-price .value {
        font-size: 36px;
    }
    
    .modal-body {
        padding: 20px;
    }
    
    .pix-code-container {
        flex-direction: column;
    }
}

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

.hero-content,
.feature-card,
.course-card,
.testimonial-card {
    animation: fadeInUp 0.6s ease forwards;
}

.feature-card:nth-child(2) { animation-delay: 0.1s; }
.feature-card:nth-child(3) { animation-delay: 0.2s; }
.feature-card:nth-child(4) { animation-delay: 0.3s; }

.course-card:nth-child(2) { animation-delay: 0.1s; }
.course-card:nth-child(3) { animation-delay: 0.2s; }
/* ===== Credit Card Payment Styles ===== */
.payment-methods-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 8px;
}

.payment-method-option {
    cursor: pointer;
}

.payment-method-option input[type="radio"] {
    display: none;
}

.method-card {
    padding: 20px;
    border: 2px solid var(--gray-lighter);
    border-radius: var(--radius);
    background: var(--white);
    text-align: center;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.method-card i {
    font-size: 32px;
    color: var(--primary);
    transition: var(--transition);
}

.method-card span {
    font-weight: 600;
    color: var(--dark);
    display: block;
}

.method-card small {
    font-size: 12px;
    color: var(--gray);
}

.payment-method-option input[type="radio"]:checked + .method-card {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(29, 78, 216, 0.05));
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.15);
}

.payment-method-option input[type="radio"]:checked + .method-card i {
    color: var(--primary-dark);
    transform: scale(1.1);
}

.method-card:hover {
    border-color: var(--primary-light);
    transform: translateY(-2px);
}

.card-brand-icon {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 32px;
}

.payment-step .form-group {
    position: relative;
}

.expiry-inputs {
    display: flex;
    align-items: center;
    gap: 8px;
}

.expiry-inputs input {
    text-align: center;
    font-weight: 600;
}

.form-group input[type="text"],
.form-group input[type="tel"],
.form-group input[type="email"] {
    color: var(--dark);
}

#cardNumber {
    padding-right: 50px;
}

#cardholderName {
    text-transform: uppercase;
}

.expiry-inputs span {
    font-size: 20px;
    font-weight: 600;
    color: var(--gray);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-select {
    width: 100%;
    padding: 14px;
    border: 2px solid var(--gray-lighter);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 16px;
    color: var(--dark);
    background: var(--white);
    cursor: pointer;
    transition: var(--transition);
}

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

.installment-info {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(29, 78, 216, 0.05));
    border-radius: var(--radius);
    color: var(--primary-dark);
    font-weight: 500;
    margin-bottom: 16px;
}

.installment-info i {
    color: var(--primary);
}

.secure-payment-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px;
    margin-top: 16px;
    background: var(--light);
    border-radius: var(--radius);
    color: var(--gray);
    font-size: 14px;
}

.secure-payment-badge i {
    color: var(--success);
    font-size: 18px;
}

/* API Response Display */
.api-response-container {
    margin: 20px 0;
    border: 2px solid var(--gray-lighter);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--light);
}

.api-response-container.hidden {
    display: none;
}

.api-response-container.error {
    border-color: var(--error);
}

.api-response-container.success {
    border-color: var(--success);
}

.api-response-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--gray-lighter);
    font-weight: 600;
    color: var(--dark);
    font-size: 14px;
}

.api-response-container.error .api-response-header {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error);
}

.api-response-container.success .api-response-header {
    background: rgba(34, 197, 94, 0.1);
    color: var(--success);
}

.api-response-content {
    padding: 16px;
    font-size: 14px;
    line-height: 1.6;
    color: var(--dark);
    max-height: 300px;
    overflow-y: auto;
}

.api-response-content pre {
    background: rgba(0, 0, 0, 0.05);
    padding: 12px;
    border-radius: 6px;
    overflow-x: auto;
    font-size: 12px;
    font-family: 'Courier New', monospace;
    margin: 8px 0 0 0;
}

.api-response-content strong {
    color: var(--primary);
}

@media (max-width: 768px) {
    .modal {
        max-width: 100%;
        max-height: 100vh;
        border-radius: 0;
    }
    
    .modal-overlay {
        padding: 0;
    }
    
    .modal-header {
        padding: 24px 20px 0;
    }
    
    .modal-body {
        padding: 24px 20px;
    }
    
    .payment-methods-selector {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}