* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

 :root {
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --secondary: #ec4899;
    --accent: #14b8a6;
    --text: #f8fafc;
    --text-light: #cbd5e1;
    --text-dim: #94a3b8;
    --bg: #0a0a0f;
    --bg-alt: #13131f;
    --border: rgba(255,255,255, 0.12);
    --glass: rgba(255,255,255, 0.08);
    --glass-border: rgba(255,255,255, 0.15);
 }

html {
    scroll-behavior: smooth;
}

 body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.8;
    overflow-x: hidden;
    font-size: 16px;
 }

h1, h2, h3, h4 {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

header {
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    height: 40px;
    width: auto;
    display: block;
    mix-blend-mode: multiply;
    filter: drop-shadow(0 0 10px rgba(99, 102, 241, 0.3));
        border-radius: 12px;
    }

.logo-icon {
    display: none;
}

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

.nav-links a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

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

.cta-small {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 12px 28px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: 1px solid transparent;
}

.cta-small:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    padding: 120px 0 80px;
    overflow: hidden;
}

#ai-visualization {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-gradient {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(10, 10, 15, 0.7) 0%, var(--bg) 100%);
    z-index: 2;
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 3;
}

.hero-badge {
    display: inline-block;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2) 0%, rgba(236, 72, 153, 0.2) 100%);
    border: 1px solid var(--primary-light);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease;
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    line-height: 1.1;
    margin-bottom: 24px;
    color: white;
    animation: fadeInUp 0.8s ease 0.1s backwards;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary) 50%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: clamp(1.1rem, 2.5vw, 1.35rem);
    color: var(--text-light);
    margin-bottom: 40px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.8s ease 0.2s backwards;
    font-weight: 400;
}

.cta-group {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 32px;
    animation: fadeInUp 0.8s ease 0.3s backwards;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 36px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s;
    border: 1px solid transparent;
}

.cta-button.primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
}

.cta-button.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(99, 102, 241, 0.5);
}

.cta-button.glass {
    background: var(--glass);
    backdrop-filter: blur(10px);
    color: white;
    border: 1px solid var(--glass-border);
}

.cta-button.glass:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary-light);
}

.cta-button.large {
    padding: 20px 60px;
    font-size: 1.25rem;
}

.cta-button.full-width {
    width: 100%;
}

.trust-badges {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.4s backwards;
}

.badge {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--glass);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--text-light);
}

.badge .icon {
    color: var(--accent);
    font-weight: 700;
}

section {
    padding: 100px 0;
}

.section-badge {
    display: inline-block;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2) 0%, rgba(236, 72, 153, 0.2) 100%);
    border: 1px solid var(--primary-light);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

section h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    text-align: center;
    margin-bottom: 16px;
    color: white;
    text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

section > .container > p {
    text-align: center;
    font-size: 1.15rem;
    color: var(--text-light);
    max-width: 650px;
    margin: 0 auto 60px;
    font-weight: 400;
}

.glass {
    background: var(--glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
}

.problem-section {
    background: var(--bg-alt);
}

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

.problem-header h2 {
    margin-bottom: 16px;
}

.problem-header p {
    font-size: 1.15rem;
    color: var(--text-light);
    font-weight: 400;
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.problem-card {
    padding: 32px;
    transition: all 0.3s;
}

.problem-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary-light);
    box-shadow: 0 8px 32px rgba(99, 102, 241, 0.2);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.problem-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    color: white;
}

.problem-card p {
    color: var(--text-light);
    font-size: 1rem;
    font-weight: 400;
}

.solution-section {
    background: var(--bg);
    position: relative;
}

.solution-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 1px;
    height: 100%;
    background: linear-gradient(180deg, transparent 0%, var(--primary) 50%, transparent 100%);
    opacity: 0.3;
}

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

.versions-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
    align-items: start;
}

.version-card {
    position: relative;
    overflow: hidden;
    transition: all 0.4s;
}

.version-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
}

.version-card.v2.featured::before {
    background: linear-gradient(90deg, var(--secondary) 0%, var(--accent) 100%);
}

.version-card.v3::before {
    background: linear-gradient(90deg, var(--accent) 0%, var(--primary) 100%);
}

.version-card:hover {
    transform: translateY(-8px);
}

.popular-tag {
    position: absolute;
    top: 16px;
    right: 16px;
    background: linear-gradient(135deg, var(--secondary) 0%, var(--accent) 100%);
    color: white;
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.version-header {
    display: flex;
    gap: 16px;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.version-number {
    font-size: 2.5rem;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.1);
    line-height: 1;
}

.version-title {
    flex: 1;
}

.version-title h3 {
    font-size: 1.4rem;
    color: white;
    margin-bottom: 4px;
}

.version-subtitle {
    font-size: 0.9rem;
    color: var(--text-light);
}

.version-tag {
    padding: 6px 12px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.version-tag.beginner {
    background: rgba(20, 184, 166, 0.2);
    color: var(--accent);
}

.version-tag.intermediate {
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-light);
}

.version-tag.advanced {
    background: rgba(236, 72, 153, 0.2);
    color: var(--secondary);
}

.version-content p.version-desc {
    color: var(--text-light);
    margin-bottom: 20px;
    font-size: 1rem;
    font-weight: 400;
}

.feature-list {
    list-style: none;
    margin: 20px 0;
}

.feature-list li {
    display: flex;
    align-items: start;
    gap: 12px;
    padding: 10px 0;
    color: var(--text-light);
    font-size: 0.95rem;
    font-weight: 400;
}

.feature-list .check {
    color: var(--accent);
    font-weight: 700;
    font-size: 1.1rem;
}

.version-outcome {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.version-outcome h4 {
    font-size: 1rem;
    color: white;
    margin-bottom: 8px;
}

.version-outcome p {
    color: var(--text-light);
    font-size: 0.95rem;
    font-weight: 400;
}

.what-you-learn {
    background: var(--bg-alt);
}

.difference-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.diff-item {
    padding: 32px;
    text-align: center;
}

.diff-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.diff-item h3 {
    font-size: 1.2rem;
    color: white;
    margin-bottom: 12px;
}

.diff-item p {
    color: var(--text-light);
    font-size: 1rem;
    font-weight: 400;
}

.testimonials {
    background: var(--bg);
}

.testimonials-header {
    text-align: center;
    margin-bottom: 48px;
}

.testimonials-header h2 {
    margin-bottom: 8px;
}

.testimonials-header p {
    color: var(--text-light);
    font-size: 1rem;
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

.testimonial-card {
    padding: 32px;
}

.stars {
    color: #fbbf24;
    font-size: 1.2rem;
    margin-bottom: 16px;
}

.testimonial-card p {
    color: var(--text-light);
    font-style: italic;
    margin-bottom: 20px;
    line-height: 1.8;
    font-size: 1.05rem;
}

.author {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 0.9rem;
}

.author-info strong {
    display: block;
    color: white;
    font-size: 1rem;
}

.author-info span {
    color: var(--text-dim);
    font-size: 0.9rem;
}

.comparison-section {
    background: var(--bg-alt);
}

.comparison-table {
    overflow-x: auto;
}

.comp-header {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 16px;
    padding: 20px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: 12px 12px 0 0;
}

.comp-header > div:first-child {
    color: white;
    font-weight: 600;
}

.v1-header, .v2-header, .v3-header {
    color: white;
    text-align: center;
}

.v1-header span, .v2-header span, .v3-header span {
    font-size: 0.85rem;
    opacity: 0.9;
}

.comp-row {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 16px;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    align-items: center;
}

.comp-row:last-child {
    border-radius: 0 0 12px 12px;
    border-bottom: none;
}

.comp-row:nth-child(even) {
    background: var(--glass);
}

.comp-row span {
    color: var(--text-light);
    font-weight: 500;
}

.comp-row .check {
    text-align: center;
    color: var(--accent);
    font-size: 1.3rem;
    font-weight: 700;
}

.comp-row .dash {
    text-align: center;
    color: var(--text-light);
    font-size: 1.3rem;
}

.comp-row.price {
    background: var(--glass);
    font-weight: 700;
}

.comp-row.price .price {
    text-align: center;
    color: white;
    font-size: 1.4rem;
}

.pricing-section {
    background: var(--bg);
}

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

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    margin-bottom: 48px;
}

.pricing-card {
    padding: 32px;
    position: relative;
    transition: all 0.3s;
}

.pricing-card.featured {
    border: 2px solid var(--secondary);
    transform: scale(1.02);
}

.pricing-card:hover {
    transform: translateY(-8px) scale(1.02);
}

.pricing-card:not(.featured):hover {
    transform: translateY(-8px);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--secondary) 0%, var(--accent) 100%);
    color: white;
    padding: 6px 20px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.price-header {
    margin-bottom: 24px;
}

.version-label {
    display: inline-block;
    background: var(--glass);
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.75rem;
    color: var(--text-light);
    margin-bottom: 12px;
}

.price-header h3 {
    font-size: 1.4rem;
    color: white;
    margin-bottom: 16px;
}

.price {
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.price .currency {
    font-size: 1.5rem;
    color: var(--primary-light);
}

.price .amount {
    font-size: 3.5rem;
    font-weight: 900;
    color: white;
}

.price .period {
    color: var(--text-light);
    font-size: 0.9rem;
}

.features {
    list-style: none;
    margin: 24px 0;
}

.features li {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    color: var(--text-light);
    font-size: 1rem;
    font-weight: 400;
}

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

.bundle-option {
    max-width: 500px;
    margin: 0 auto;
}

.bundle-card {
    padding: 40px;
    text-align: center;
    border: 2px solid var(--primary-light);
}

.bundle-card h4 {
    font-size: 1.4rem;
    color: white;
    margin-bottom: 8px;
}

.bundle-card p {
    color: var(--text-light);
    margin-bottom: 20px;
    font-size: 1.05rem;
}

.bundle-price {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin: 20px 0 30px;
}

.bundle-price .original {
    font-size: 1.5rem;
    color: var(--text-light);
    text-decoration: line-through;
}

.bundle-price .final {
    font-size: 3.5rem;
    font-weight: 900;
    color: white;
}

.bundle-price .save {
    background: var(--accent);
    color: var(--bg);
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 700;
}

.guarantee-section {
    background: var(--bg-alt);
}

.guarantee-card {
    max-width: 700px;
    margin: 0 auto;
    padding: 48px;
    text-align: center;
}

.guarantee-icon {
    font-size: 4rem;
    margin-bottom: 24px;
}

.guarantee-card h2 {
    color: white;
    margin-bottom: 16px;
}

.guarantee-card p {
    color: var(--text-light);
    font-size: 1.15rem;
}

.faq-section {
    background: var(--bg);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 24px;
}

.faq-item {
    padding: 32px;
}

.faq-item h3 {
    font-size: 1.1rem;
    color: white;
    margin-bottom: 12px;
}

.faq-item p {
    color: var(--text-light);
    font-size: 1rem;
    font-weight: 400;
}

.final-cta {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 50%, var(--secondary) 100%);
    text-align: center;
    padding: 120px 0;
}

.final-cta h2 {
    color: white;
    margin-bottom: 16px;
}

.final-cta p {
    font-size: 1.3rem;
    margin-bottom: 32px;
    opacity: 0.95;
    color: white;
}

.final-cta .cta-button {
    background: white;
    color: var(--primary-dark);
}

.final-cta .cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
}

.final-note {
    margin-top: 24px;
    opacity: 0.9;
    color: white;
}

footer {
    background: var(--bg-alt);
    padding: 60px 0 30px;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 48px;
    margin-bottom: 40px;
}

.footer-brand p {
    color: var(--text-dim);
    margin-top: 16px;
    font-size: 0.95rem;
}

.footer-links h4 {
    color: white;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
}

.footer-links a {
    display: block;
    color: var(--text-light);
    text-decoration: none;
    padding: 8px 0;
    transition: color 0.3s;
    font-weight: 400;
}

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

footer p {
    text-align: center;
    color: var(--text-dim);
    font-size: 0.9rem;
    padding-top: 30px;
    border-top: 1px solid var(--border);
}

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

@media (max-width: 1024px) {
    .comp-header, .comp-row {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .comp-header > div:first-child {
        display: none;
    }
}

@media (max-width: 768px) {
    nav {
        flex-wrap: wrap;
        gap: 16px;
    }
    
    .nav-links {
        display: none;
    }
    
    .hero {
        padding: 80px 0 60px;
    }
    
    section {
        padding: 60px 0;
    }
    
    .versions-container {
        grid-template-columns: 1fr;
    }
    
    .version-header {
        flex-wrap: wrap;
    }
    
    .version-card.v2.featured {
        transform: none;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .faq-grid {
        grid-template-columns: 1fr;
    }
}