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

:root {
    --primary-color: #5b5dd8;
    --primary-dark: #4547c7;
    --primary-light: #7b7df5;
    --secondary-color: #06b6d4;
    --success-color: #22c55e;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --purple-gradient: linear-gradient(135deg, #5b5dd8 0%, #7b7df5 100%);
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-white: #ffffff;
    --bg-gray: #f9fafb;
    --bg-light: #f3f4f6;
    --bg-purple-light: #f5f5ff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--border-color);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

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

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

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

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

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

.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);
}

/* Buttons */
.btn-primary {
    background: var(--purple-gradient);
    color: white;
    padding: 12px 28px;
    border-radius: var(--border-radius);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    background: white;
    color: var(--primary-color);
    padding: 12px 28px;
    border-radius: var(--border-radius);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    transition: var(--transition);
    border: 2px solid var(--primary-color);
    cursor: pointer;
}

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

.btn-primary.large,
.btn-secondary.large {
    padding: 16px 36px;
    font-size: 18px;
}

/* App Store & Play Store Buttons */
.btn-appstore,
.btn-playstore {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 14px 28px;
    border-radius: 12px;
    text-decoration: none;
    transition: var(--transition);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    border: 2px solid transparent;
}

.btn-appstore {
    background: #000000;
    color: white;
}

.btn-appstore:hover {
    background: #1a1a1a;
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.btn-playstore {
    background: #000000;
    color: white;
}

.btn-playstore:hover {
    background: #1a1a1a;
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.store-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
}

.store-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
}

.store-label {
    font-size: 11px;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    opacity: 0.9;
}

.store-name {
    font-size: 20px;
    font-weight: 600;
    line-height: 1;
}

.btn-appstore.large,
.btn-playstore.large {
    padding: 16px 32px;
}

.btn-appstore.large .store-name,
.btn-playstore.large .store-name {
    font-size: 22px;
}

/* Hero Section */
.hero {
    padding: 140px 0 80px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #f5f7ff 0%, #ffffff 100%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.8;
}

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

.download-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Phone Mockup */
.phone-mockup {
    position: relative;
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
}

.phone-mockup img {
    width: 100%;
    border-radius: 30px;
    box-shadow: 0 40px 80px -20px rgba(0, 0, 0, 0.3);
}

.floating-card {
    position: absolute;
    background: white;
    padding: 16px 24px;
    border-radius: 16px;
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: float 3s ease-in-out infinite;
}

.floating-card.card-1 {
    top: 10%;
    left: -40px;
    animation-delay: 0s;
}

.floating-card.card-2 {
    top: 50%;
    right: -40px;
    animation-delay: 1s;
}

.floating-card.card-3 {
    bottom: 10%;
    left: -40px;
    animation-delay: 2s;
}

.card-icon {
    font-size: 24px;
}

.card-text {
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* Hero Background */
.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    overflow: hidden;
}

.circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
}

.circle-1 {
    width: 500px;
    height: 500px;
    background: var(--primary-color);
    top: -200px;
    right: -100px;
}

.circle-2 {
    width: 300px;
    height: 300px;
    background: var(--secondary-color);
    bottom: -100px;
    left: -50px;
}

.circle-3 {
    width: 200px;
    height: 200px;
    background: var(--success-color);
    top: 50%;
    left: 10%;
}

/* Section Styles */
section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.section-description {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Features Section */
.features {
    background: white;
}

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

.feature-card {
    padding: 32px;
    background: var(--bg-gray);
    border-radius: var(--border-radius);
    transition: var(--transition);
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* How It Works Section */
.how-it-works {
    background: var(--bg-gray);
}

.steps {
    display: flex;
    justify-content: space-between;
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.step {
    flex: 1;
    text-align: center;
}

.step-number {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-weight: 700;
    margin: 0 auto 24px;
    box-shadow: var(--shadow-lg);
}

.step-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.step-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Levels Section */
.levels {
    background: white;
}

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

.level-card {
    padding: 32px;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.level-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.level-badge {
    display: inline-block;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
    color: white;
}

.level-badge.beginner {
    background: linear-gradient(135deg, #22c55e, #16a34a);
}

.level-badge.elementary {
    background: var(--purple-gradient);
}

.level-badge.intermediate {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.level-badge.advanced {
    background: linear-gradient(135deg, #6366f1, #4f46e5);
}

.level-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.level-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.7;
}

.level-features {
    list-style: none;
}

.level-features li {
    padding: 8px 0;
    color: var(--text-secondary);
}

/* Stats Section */
.stats-section {
    background: var(--purple-gradient);
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

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

.stat-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.stat-value {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 8px;
}

/* Testimonials Section */
.testimonials {
    background: var(--bg-gray);
}

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

.testimonial-card {
    padding: 32px;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

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

.testimonial-rating {
    font-size: 20px;
    margin-bottom: 16px;
}

.testimonial-text {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.8;
    font-style: italic;
}

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

.author-avatar {
    width: 50px;
    height: 50px;
    background: var(--bg-gray);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.author-name {
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.author-title {
    font-size: 14px;
    color: var(--text-secondary);
}

/* CTA Section */
.cta {
    background: white;
    position: relative;
    overflow: hidden;
}

.cta-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.cta-title {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.cta-description {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.cta-features {
    display: flex;
    gap: 32px;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-feature {
    color: var(--text-secondary);
    font-weight: 500;
}

.cta-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.gradient-blob {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
    filter: blur(60px);
}

.gradient-blob.blob-1 {
    width: 400px;
    height: 400px;
    background: var(--primary-color);
    top: -100px;
    left: -100px;
}

.gradient-blob.blob-2 {
    width: 400px;
    height: 400px;
    background: var(--secondary-color);
    bottom: -100px;
    right: -100px;
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-description {
    color: var(--text-light);
    margin-bottom: 24px;
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-link {
    color: white;
    text-decoration: none;
    transition: var(--transition);
}

.social-link:hover {
    color: var(--primary-light);
}

.footer-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-links {
    list-style: none;
}

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

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

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

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: var(--text-light);
}

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

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: start;
}

.contact-info {
    position: sticky;
    top: 120px;
}

.contact-info .section-title {
    text-align: left;
    font-size: 36px;
    margin-bottom: 16px;
}

.contact-info .section-description {
    text-align: left;
    margin-bottom: 40px;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.contact-method {
    display: flex;
    gap: 20px;
    align-items: start;
}

.contact-icon {
    font-size: 36px;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: 50%;
    box-shadow: var(--shadow-md);
}

.contact-details h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.contact-details p,
.contact-details a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

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

.social-links-contact {
    display: flex;
    gap: 16px;
}

.social-links-contact a {
    padding: 8px 16px;
    background: white;
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.social-links-contact a:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Contact Form */
.contact-form-wrapper {
    background: white;
    padding: 48px;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 15px;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 14px 18px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 16px;
    font-family: inherit;
    transition: var(--transition);
    background: var(--bg-white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(91, 93, 216, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-light);
}

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

.form-group select {
    cursor: pointer;
}

.submit-btn {
    width: 100%;
    justify-content: center;
    margin-top: 8px;
    font-size: 16px;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 42px;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .levels-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-description {
        font-size: 18px;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-direction: column;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .phone-mockup {
        max-width: 300px;
    }
    
    .floating-card {
        display: none;
    }
    
    .features-grid,
    .levels-grid,
    .testimonials-grid,
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .steps {
        flex-direction: column;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .cta-title {
        font-size: 32px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-appstore,
    .btn-playstore {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-info {
        position: static;
    }
    
    .contact-form-wrapper {
        padding: 32px 24px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .cta-title {
        font-size: 28px;
    }
    
    .btn-primary.large,
    .btn-secondary.large {
        padding: 14px 28px;
        font-size: 16px;
    }
    
    .btn-appstore.large,
    .btn-playstore.large {
        padding: 12px 24px;
    }
    
    .store-name {
        font-size: 18px;
    }
    
    .contact-form-wrapper {
        padding: 24px 20px;
    }
    
    .cta-features {
        flex-direction: column;
        gap: 12px;
    }
}