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

:root {
    --black: #000000;
    --white: #ffffff;
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-200: #e5e5e5;
    --gray-300: #d4d4d4;
    --gray-400: #a3a3a3;
    --gray-500: #737373;
    --gray-600: #525252;
    --gray-700: #404040;
    --gray-800: #262626;
    --gray-900: #171717;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius: 12px;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--white);
    color: var(--black);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Typography */
h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.2;
}

.highlight {
    color: var(--black);
    position: relative;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0;
    width: 100%;
    height: 6px;
    background-color: var(--gray-200);
    z-index: -1;
}

.bold {
    font-weight: 700;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: var(--white);
    border-bottom: 1px solid var(--gray-200);
    z-index: 1000;
    padding: 16px 0;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.9);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 600;
    color: var(--black);
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--black);
}

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

.nav-link {
    color: var(--gray-700);
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--black);
}

.btn-whatsapp {
    background: #25D366;
    color: white;
    padding: 10px 20px;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.btn-whatsapp:hover {
    background: #1da851;
    transform: translateY(-2px);
}

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

/* Hero Section */
.hero {
    padding: 160px 0 80px;
    background-color: var(--white);
}

.hero-content {
    max-width: 800px;
}

.hero-title {
    font-size: 64px;
    margin-bottom: 24px;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--gray-600);
    margin-bottom: 48px;
    max-width: 600px;
}

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

.stat h3 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 8px;
}

.stat p {
    color: var(--gray-500);
    font-size: 16px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: var(--gray-800);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-enroll {
    width: 100%;
    background-color: var(--black);
    color: var(--white);
    margin-top: 24px;
}

.btn-enroll:hover {
    background-color: var(--gray-800);
}

.btn-enroll.special {
    background: linear-gradient(45deg, var(--black), var(--gray-800));
}

.btn-secondary {
    background-color: var(--gray-100);
    color: var(--black);
}

.btn-secondary:hover {
    background-color: var(--gray-200);
}

.btn-pay {
    width: 100%;
    background-color: var(--black);
    color: var(--white);
    font-size: 18px;
    padding: 20px;
}

.btn-pay:hover {
    background-color: var(--gray-800);
}

.btn-access {
    width: 100%;
    background-color: var(--black);
    color: var(--white);
    margin-top: 16px;
}

.btn-access:hover {
    background-color: var(--gray-800);
}

/* Courses Section */
.courses {
    padding: 80px 0;
    background-color: var(--gray-50);
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-header h2 {
    font-size: 48px;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 20px;
    color: var(--gray-600);
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.course-card {
    background-color: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
}

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

.course-header {
    position: relative;
}

.course-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    background-color: var(--black);
    color: var(--white);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    z-index: 1;
}

.course-image {
    height: 200px;
    overflow: hidden;
}

.course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.course-card:hover .course-image img {
    transform: scale(1.05);
}

.course-content {
    padding: 32px;
}

.course-content h3 {
    font-size: 24px;
    margin-bottom: 16px;
}

.course-description {
    color: var(--gray-600);
    margin-bottom: 24px;
    line-height: 1.6;
}

.course-features {
    display: flex;
    justify-content: space-between;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--gray-200);
}

.feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--gray-600);
    font-size: 14px;
}

.feature i {
    font-size: 20px;
}

.course-pricing {
    display: flex;
    align-items: center;
    gap: 16px;
}

.price-original {
    color: var(--gray-400);
    text-decoration: line-through;
    font-size: 18px;
}

.price-current {
    display: flex;
    align-items: center;
    gap: 12px;
}

.currency {
    font-size: 32px;
    font-weight: 700;
}

.discount {
    background-color: var(--gray-100);
    color: var(--black);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

.discount.special {
    background-color: var(--black);
    color: var(--white);
}

/* Features Section */
.features {
    padding: 80px 0;
    background-color: var(--white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 48px;
    margin-top: 48px;
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    background-color: var(--gray-100);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.feature-icon i {
    font-size: 24px;
    color: var(--black);
}

.feature-item h3 {
    font-size: 20px;
    margin-bottom: 12px;
}

.feature-item p {
    color: var(--gray-600);
    line-height: 1.6;
}

/* About Section */
.about {
    padding: 80px 0;
    background-color: var(--gray-50);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.about-text h3 {
    font-size: 32px;
    margin-bottom: 24px;
}

.about-text p {
    color: var(--gray-600);
    margin-bottom: 24px;
    line-height: 1.6;
}

.contact-info p {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    color: var(--gray-700);
}

.about-image img {
    width: 100%;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-content {
    background-color: var(--white);
    border-radius: var(--radius);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalSlide 0.3s ease;
}

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

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    background: var(--white);
    z-index: 1;
}

.modal-header h3 {
    font-size: 24px;
}

.modal-close {
    background: none;
    border: none;
    color: var(--gray-500);
    font-size: 24px;
    cursor: pointer;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--black);
}

.modal-body {
    padding: 24px;
}

.order-summary {
    background-color: var(--gray-50);
    padding: 20px;
    border-radius: var(--radius);
    margin-bottom: 24px;
}

.order-summary h4 {
    margin-bottom: 12px;
    font-size: 18px;
}

.amount-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 18px;
}

.amount {
    font-size: 32px;
    font-weight: 700;
}

.order-note {
    color: var(--gray-600);
    font-size: 14px;
    margin-top: 12px;
}

.payment-section h4 {
    margin-bottom: 16px;
    font-size: 18px;
}

.payment-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 24px;
}

.payment-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 20px;
    background-color: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
}

.payment-option.active {
    border-color: var(--black);
    background-color: var(--gray-50);
}

.payment-option:hover {
    border-color: var(--gray-400);
}

.payment-option img {
    width: 48px;
    height: 48px;
}

.payment-option i {
    font-size: 32px;
    color: var(--black);
}

.payment-note {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    background-color: var(--gray-50);
    padding: 16px;
    border-radius: var(--radius);
    margin-bottom: 24px;
}

.payment-note i {
    color: var(--gray-500);
    margin-top: 2px;
}

.payment-note p {
    color: var(--gray-600);
    font-size: 14px;
}

.payment-instructions {
    background-color: var(--gray-50);
    padding: 20px;
    border-radius: var(--radius);
    margin-bottom: 24px;
}

.payment-instructions h5 {
    margin-bottom: 12px;
    font-size: 16px;
}

.payment-instructions ol {
    padding-left: 20px;
    color: var(--gray-600);
    font-size: 14px;
}

.payment-instructions li {
    margin-bottom: 8px;
}

.modal-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Success Modal */
.success .modal-content {
    text-align: center;
    padding: 40px;
}

.success-icon {
    width: 80px;
    height: 80px;
    background-color: var(--gray-100);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

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

.success .modal-content h3 {
    font-size: 28px;
    margin-bottom: 16px;
}

.success .modal-content p {
    color: var(--gray-600);
    margin-bottom: 32px;
}

.drive-section {
    text-align: left;
    margin-bottom: 32px;
}

.drive-section h4 {
    margin-bottom: 16px;
    font-size: 18px;
}

.drive-link {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.drive-link input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-family: 'Inter', monospace;
    font-size: 14px;
    background-color: var(--gray-50);
}

.btn-copy {
    background-color: var(--gray-100);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    padding: 12px 20px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-copy:hover {
    background-color: var(--gray-200);
}

.success-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.btn-whatsapp {
    background: #25D366;
    color: white;
    border: none;
}

.btn-whatsapp:hover {
    background: #1da851;
}

/* Footer */
.footer {
    background-color: var(--gray-50);
    padding: 64px 0 32px;
    border-top: 1px solid var(--gray-200);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 48px;
    margin-bottom: 48px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.footer-logo-img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--black);
}

.footer-logo h3 {
    font-size: 20px;
    margin-bottom: 4px;
}

.footer-logo p {
    color: var(--gray-600);
    font-size: 14px;
}

.footer-section h4 {
    font-size: 18px;
    margin-bottom: 24px;
}

.footer-section a {
    display: block;
    color: var(--gray-600);
    text-decoration: none;
    margin-bottom: 12px;
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--black);
}

.footer-section p {
    color: var(--gray-600);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-bottom {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid var(--gray-200);
    color: var(--gray-500);
    font-size: 14px;
}

.footer-bottom p {
    margin-bottom: 8px;
}

.disclaimer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

/* WhatsApp Float Button */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: #25D366;
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    text-decoration: none;
    transition: var(--transition);
}

.whatsapp-float:hover {
    background-color: #1da851;
    transform: scale(1.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 48px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 32px;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        border-top: 1px solid var(--gray-200);
        box-shadow: var(--shadow);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .course-grid {
        grid-template-columns: 1fr;
    }
    
    .payment-options {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .hero {
        padding: 120px 0 60px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .section-header h2 {
        font-size: 36px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}