:root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --secondary: #6366f1;
    --accent: #8b5cf6;
    --dark: #1e293b;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --white: #ffffff;
    --success: #10b981;
    --warning: #f59e0b;
}

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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
}

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

/* Header */
header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    border-bottom: 1px solid var(--gray-200);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.cta-header {
    background: var(--primary);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.cta-header:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--gray-50) 0%, #e0e7ff 100%);
    padding: 120px 0 80px;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero .subtitle {
    font-size: 1.3rem;
    color: var(--gray-600);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-image {
    width: 100%;
    max-width: 500px;
    height: 400px;
    background: linear-gradient(45deg, #f0f4f8, #d6e7f0);
    border-radius: 20px;
    margin: 2rem auto;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--gray-600);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    overflow: hidden;
}

.cta-primary {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: 1rem 3rem;
    font-size: 1.2rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 12px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

.cta-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.4);
}

/* Features Section */
.features {
    padding: 100px 0;
    background: var(--white);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--gray-600);
    margin-bottom: 4rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.feature-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 16px;
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    border-color: var(--primary);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: white;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

/* Price Display */
.price-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin: 1.5rem 0;
    flex-wrap: wrap;
}

.price-label {
    font-size: 1.1rem;
    color: var(--gray-600);
    font-weight: 500;
}

.price-current {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    text-shadow: 0 2px 4px rgba(59, 130, 246, 0.2);
}

.price-original {
    font-size: 1.2rem;
    color: var(--gray-500);
    text-decoration: line-through;
}

.price-discount {
    background: var(--success);
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* Responsive price */
@media (max-width: 480px) {
    .price-current {
        font-size: 2rem;
    }
    
    .price-display {
        gap: 0.5rem;
    }
}

.feature-card p {
    color: var(--gray-600);
    line-height: 1.7;
}

/* Specifications */
.specs {
    padding: 100px 0;
    background: var(--gray-50);
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.spec-item {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 12px;
    border-left: 4px solid var(--primary);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.spec-label {
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.spec-value {
    color: var(--gray-600);
}

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

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.testimonial {
    background: var(--gray-50);
    padding: 2rem;
    border-radius: 16px;
    position: relative;
}

.testimonial::before {
    content: '"';
    font-size: 4rem;
    color: var(--primary);
    position: absolute;
    top: -10px;
    left: 20px;
    font-family: serif;
}

.testimonial-text {
    font-style: italic;
    color: var(--gray-700);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    line-height: 1.7;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-avatar {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
}

.author-info h4 {
    font-weight: 600;
    color: var(--gray-900);
}

.author-info p {
    color: var(--gray-600);
    font-size: 0.9rem;
}

.stars {
    color: #fbbf24;
    margin-top: 0.5rem;
}

/* FAQ */
.faq {
    padding: 100px 0;
    background: var(--gray-50);
}

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

.faq-item {
    margin-bottom: 1rem;
}

.faq-item details {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.faq-item summary {
    padding: 1.5rem;
    font-weight: 600;
    color: var(--gray-900);
    cursor: pointer;
    border-bottom: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

.faq-item summary:hover {
    background: var(--gray-50);
}

.faq-content {
    padding: 1.5rem;
    color: var(--gray-600);
    line-height: 1.7;
}

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

.cta-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-final {
    display: inline-block;
    background: var(--white);
    color: var(--primary);
    padding: 1rem 3rem;
    font-size: 1.2rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.cta-final:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255,255,255,0.3);
}

/* Footer */
footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    color: var(--white);
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-section p,
.footer-section a {
    color: var(--gray-400);
    text-decoration: none;
    line-height: 1.8;
}

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

.footer-bottom {
    border-top: 1px solid var(--gray-700);
    padding-top: 2rem;
    text-align: center;
    color: var(--gray-500);
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero .subtitle {
        font-size: 1.1rem;
        padding: 0 1rem;
    }
    
    .features-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .cta-primary,
    .cta-final {
        padding: 0.8rem 2rem;
        font-size: 1.1rem;
    }
}